2014-11-04 16:14:14 -07:00
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/*
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* Copyright (C) 2014 Red Hat
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* Copyright (C) 2014 Intel Corp.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Rob Clark <robdclark@gmail.com>
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* Daniel Vetter <daniel.vetter@ffwll.ch>
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*/
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#include <drm/drmP.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_crtc_helper.h>
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drm: Atomic crtc/connector updates using crtc/plane helper interfaces
So this is finally the integration of the crtc and plane helper
interfaces into the atomic helper functions.
In the check function we now have a few steps:
- First we update the output routing and figure out which crtcs need a
full mode set. Suitable encoders are selected using ->best_encoder,
with the same semantics as the crtc helpers of implicitly disabling
all connectors currently using the encoder.
- Then we pull all other connectors into the state update which feed
from a crtc which changes. This must be done do catch mode changes
and similar updates - atomic updates are differences on top of the
current state.
- Then we call all the various ->mode_fixup to compute the adjusted
mode. Note that here we have a slight semantic difference compared
to the crtc helpers: We have not yet updated the encoder->crtc link
when calling the encoder's ->mode_fixup function. But that's a
requirement when converting to atomic since we want to prepare the
entire state completely contained with the over drm_atomic_state
structure. So this must be carefully checked when converting drivers
over to atomic helpers.
- Finally we do call the atomic_check functions on planes and crtcs.
The commit function is also quite a beast:
- The only step that can fail is done first, namely pinning the
framebuffers. After that we cross the point of no return, an async
commit would push all that into the worker thread.
- The disabling of encoders and connectors is a bit tricky, since
depending upon the final state we need to select different crtc
helper functions.
- Software tracking is a bit clarified compared to the crtc helpers:
We commit the software state before starting to touch the hardware,
like crtc helpers. But since we just swap them we still have the old
state (i.e. the current hw state) around, which is really handy to
write simple disable functions. So no more
drm_crtc_helper_disable_all_unused_functions kind of fun because
we're leaving unused crtcs/encoders behind. Everything gets shut
down in-order now, which is one of the key differences of the i915
helpers compared to crtc helpers and a really nice additional
guarantee.
- Like with the plane helpers the atomic commit function waits for one
vblank to pass before calling the framebuffer cleanup function.
Compared to Rob's helper approach there's a bunch of upsides:
- All the interfaces which can fail are called in the ->check hook
(i.e. ->best_match and the various ->mode_fixup hooks). This means
that drivers can just reuse those functions and don't need to move
everything into ->atomic_check callbacks. If drivers have no need
for additional constraint checking beyong their existing crtc
helper callbacks they don't need to do anything.
- The actual commit operation is properly stage: First we prepare
framebuffers, which can potentially still fail (due to memory
exhausting). This is important for the async case, where this must
be done synchronously to correctly return errors.
- The output configuration changes (done with crtc helper functions)
and the plane update (using atomic plane helpers) are correctly
interleaved: First we shut down any crtcs that need changing, then
we update planes and finally we enable everything again. Hardware
without GO bits must be more careful with ordering, which this
sequence enables.
- Also for hardware with shared output resources (like display PLLs)
we first must shut down the old configuration before we can enable
the new one. Otherwise we can hit an impossible intermediate state
where there's not enough PLLs (which is the point behind atomic
updates).
v2:
- Ensure that users of ->check update crtc_state->enable correctly.
- Update the legacy state in crtc/plane structures. Eventually we want
to remove that, but for now the drm core still expects this (especially
the plane->fb pointer).
v3: A few changes for better async handling:
- Reorder the software side state commit so that it happens all before
we touch the hardware. This way async support becomes very easy
since we can punt all the actual hw touching to a worker thread. And
as long as we synchronize with that thread (flushing or cancelling,
depending upon what the driver can handle) before we commit the next
software state there's no need for any locking in the worker thread
at all. Which greatly simplifies things.
And as long as we synchronize with all relevant threads we can have
a lot of them (e.g. per-crtc for per-crtc updates) running in
parallel.
- Expose pre/post plane commit steps separately. We need to expose the
actual hw commit step anyway for drivers to be able to implement
asynchronous commit workers. But if we expose pre/post and plane
commit steps individually we allow drivers to selectively use atomic
helpers.
- I've forgotten to call encoder/bridge ->mode_set functions, fix
this.
v4: Add debug output and fix a mixup between current and new state
that resulted in crtcs not getting updated correctly. And in an
Oops ...
v5:
- Be kind to driver writers in the vblank wait functions.. if thing
aren't working yet, and vblank irq will never come, then let's not
block forever.. especially under console-lock.
- Correctly clear connector_state->best_encoder when disabling.
Spotted while trying to understand a report from Rob Clark.
- Only steal encoder if it actually changed, otherwise hilarity ensues
if we steal from the current connector and so set the ->crtc pointer
unexpectedly to NULL. Reported by Rob Clark.
- Bail out in disable_outputs if an output currently doesn't have a
best_encoder - this means it's already disabled.
v6: Fixupe kerneldoc as reported by Paulo. And also fix up kerneldoc
in drm_crtc.h.
v7: Take ownership of the atomic state and clean it up with
drm_atomic_state_free().
v8 Various improvements all over:
- Polish code comments and kerneldoc.
- Improve debug output to make sure all failure cases are logged.
- Treat enabled crtc with no connectors as invalid input from userspace.
- Don't ignore the return value from mode_fixup().
v9:
- Improve debug output for crtc_state->mode_changed.
v10:
- Fixup the vblank waiting code to properly balance the vblank_get/put
calls.
- Better comments when checking/computing crtc->mode_changed
v11: Fixup the encoder stealing logic: We can't look at encoder->crtc
since that's not in the atomic state structures and might be updated
asynchronously in and async commit. Instead we need to inspect all the
connector states and check whether the encoder is currently in used
and if so, on which crtc.
v12: Review from Sean:
- A few spelling fixes.
- Flatten control flow indent by converting if blocks to early
continue/return in 2 places.
- Capture connectors_for_crtc return value in int num_connectors
instead of bool has_connectors and do an explicit int->bool
conversion with !!. I think the helper is more useful for drivers if
it returns the number of connectors (e.g. to detect cloning
configurations), so decided to keep that return value.
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-09-16 09:50:47 -06:00
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#include <drm/drm_atomic_helper.h>
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2014-11-04 16:14:14 -07:00
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static void
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drm_atomic_helper_plane_changed(struct drm_atomic_state *state,
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struct drm_plane_state *plane_state,
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struct drm_plane *plane)
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{
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struct drm_crtc_state *crtc_state;
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if (plane->state->crtc) {
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crtc_state = state->crtc_states[drm_crtc_index(plane->crtc)];
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if (WARN_ON(!crtc_state))
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return;
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crtc_state->planes_changed = true;
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}
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if (plane_state->crtc) {
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crtc_state =
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state->crtc_states[drm_crtc_index(plane_state->crtc)];
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if (WARN_ON(!crtc_state))
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return;
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crtc_state->planes_changed = true;
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}
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}
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drm: Atomic crtc/connector updates using crtc/plane helper interfaces
So this is finally the integration of the crtc and plane helper
interfaces into the atomic helper functions.
In the check function we now have a few steps:
- First we update the output routing and figure out which crtcs need a
full mode set. Suitable encoders are selected using ->best_encoder,
with the same semantics as the crtc helpers of implicitly disabling
all connectors currently using the encoder.
- Then we pull all other connectors into the state update which feed
from a crtc which changes. This must be done do catch mode changes
and similar updates - atomic updates are differences on top of the
current state.
- Then we call all the various ->mode_fixup to compute the adjusted
mode. Note that here we have a slight semantic difference compared
to the crtc helpers: We have not yet updated the encoder->crtc link
when calling the encoder's ->mode_fixup function. But that's a
requirement when converting to atomic since we want to prepare the
entire state completely contained with the over drm_atomic_state
structure. So this must be carefully checked when converting drivers
over to atomic helpers.
- Finally we do call the atomic_check functions on planes and crtcs.
The commit function is also quite a beast:
- The only step that can fail is done first, namely pinning the
framebuffers. After that we cross the point of no return, an async
commit would push all that into the worker thread.
- The disabling of encoders and connectors is a bit tricky, since
depending upon the final state we need to select different crtc
helper functions.
- Software tracking is a bit clarified compared to the crtc helpers:
We commit the software state before starting to touch the hardware,
like crtc helpers. But since we just swap them we still have the old
state (i.e. the current hw state) around, which is really handy to
write simple disable functions. So no more
drm_crtc_helper_disable_all_unused_functions kind of fun because
we're leaving unused crtcs/encoders behind. Everything gets shut
down in-order now, which is one of the key differences of the i915
helpers compared to crtc helpers and a really nice additional
guarantee.
- Like with the plane helpers the atomic commit function waits for one
vblank to pass before calling the framebuffer cleanup function.
Compared to Rob's helper approach there's a bunch of upsides:
- All the interfaces which can fail are called in the ->check hook
(i.e. ->best_match and the various ->mode_fixup hooks). This means
that drivers can just reuse those functions and don't need to move
everything into ->atomic_check callbacks. If drivers have no need
for additional constraint checking beyong their existing crtc
helper callbacks they don't need to do anything.
- The actual commit operation is properly stage: First we prepare
framebuffers, which can potentially still fail (due to memory
exhausting). This is important for the async case, where this must
be done synchronously to correctly return errors.
- The output configuration changes (done with crtc helper functions)
and the plane update (using atomic plane helpers) are correctly
interleaved: First we shut down any crtcs that need changing, then
we update planes and finally we enable everything again. Hardware
without GO bits must be more careful with ordering, which this
sequence enables.
- Also for hardware with shared output resources (like display PLLs)
we first must shut down the old configuration before we can enable
the new one. Otherwise we can hit an impossible intermediate state
where there's not enough PLLs (which is the point behind atomic
updates).
v2:
- Ensure that users of ->check update crtc_state->enable correctly.
- Update the legacy state in crtc/plane structures. Eventually we want
to remove that, but for now the drm core still expects this (especially
the plane->fb pointer).
v3: A few changes for better async handling:
- Reorder the software side state commit so that it happens all before
we touch the hardware. This way async support becomes very easy
since we can punt all the actual hw touching to a worker thread. And
as long as we synchronize with that thread (flushing or cancelling,
depending upon what the driver can handle) before we commit the next
software state there's no need for any locking in the worker thread
at all. Which greatly simplifies things.
And as long as we synchronize with all relevant threads we can have
a lot of them (e.g. per-crtc for per-crtc updates) running in
parallel.
- Expose pre/post plane commit steps separately. We need to expose the
actual hw commit step anyway for drivers to be able to implement
asynchronous commit workers. But if we expose pre/post and plane
commit steps individually we allow drivers to selectively use atomic
helpers.
- I've forgotten to call encoder/bridge ->mode_set functions, fix
this.
v4: Add debug output and fix a mixup between current and new state
that resulted in crtcs not getting updated correctly. And in an
Oops ...
v5:
- Be kind to driver writers in the vblank wait functions.. if thing
aren't working yet, and vblank irq will never come, then let's not
block forever.. especially under console-lock.
- Correctly clear connector_state->best_encoder when disabling.
Spotted while trying to understand a report from Rob Clark.
- Only steal encoder if it actually changed, otherwise hilarity ensues
if we steal from the current connector and so set the ->crtc pointer
unexpectedly to NULL. Reported by Rob Clark.
- Bail out in disable_outputs if an output currently doesn't have a
best_encoder - this means it's already disabled.
v6: Fixupe kerneldoc as reported by Paulo. And also fix up kerneldoc
in drm_crtc.h.
v7: Take ownership of the atomic state and clean it up with
drm_atomic_state_free().
v8 Various improvements all over:
- Polish code comments and kerneldoc.
- Improve debug output to make sure all failure cases are logged.
- Treat enabled crtc with no connectors as invalid input from userspace.
- Don't ignore the return value from mode_fixup().
v9:
- Improve debug output for crtc_state->mode_changed.
v10:
- Fixup the vblank waiting code to properly balance the vblank_get/put
calls.
- Better comments when checking/computing crtc->mode_changed
v11: Fixup the encoder stealing logic: We can't look at encoder->crtc
since that's not in the atomic state structures and might be updated
asynchronously in and async commit. Instead we need to inspect all the
connector states and check whether the encoder is currently in used
and if so, on which crtc.
v12: Review from Sean:
- A few spelling fixes.
- Flatten control flow indent by converting if blocks to early
continue/return in 2 places.
- Capture connectors_for_crtc return value in int num_connectors
instead of bool has_connectors and do an explicit int->bool
conversion with !!. I think the helper is more useful for drivers if
it returns the number of connectors (e.g. to detect cloning
configurations), so decided to keep that return value.
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-09-16 09:50:47 -06:00
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static struct drm_crtc *
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get_current_crtc_for_encoder(struct drm_device *dev,
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struct drm_encoder *encoder)
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{
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struct drm_mode_config *config = &dev->mode_config;
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struct drm_connector *connector;
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WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
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list_for_each_entry(connector, &config->connector_list, head) {
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if (connector->state->best_encoder != encoder)
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continue;
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return connector->state->crtc;
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}
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return NULL;
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}
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static int
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steal_encoder(struct drm_atomic_state *state,
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struct drm_encoder *encoder,
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struct drm_crtc *encoder_crtc)
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{
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struct drm_mode_config *config = &state->dev->mode_config;
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struct drm_crtc_state *crtc_state;
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struct drm_connector *connector;
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struct drm_connector_state *connector_state;
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2014-07-27 05:46:52 -06:00
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int ret;
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drm: Atomic crtc/connector updates using crtc/plane helper interfaces
So this is finally the integration of the crtc and plane helper
interfaces into the atomic helper functions.
In the check function we now have a few steps:
- First we update the output routing and figure out which crtcs need a
full mode set. Suitable encoders are selected using ->best_encoder,
with the same semantics as the crtc helpers of implicitly disabling
all connectors currently using the encoder.
- Then we pull all other connectors into the state update which feed
from a crtc which changes. This must be done do catch mode changes
and similar updates - atomic updates are differences on top of the
current state.
- Then we call all the various ->mode_fixup to compute the adjusted
mode. Note that here we have a slight semantic difference compared
to the crtc helpers: We have not yet updated the encoder->crtc link
when calling the encoder's ->mode_fixup function. But that's a
requirement when converting to atomic since we want to prepare the
entire state completely contained with the over drm_atomic_state
structure. So this must be carefully checked when converting drivers
over to atomic helpers.
- Finally we do call the atomic_check functions on planes and crtcs.
The commit function is also quite a beast:
- The only step that can fail is done first, namely pinning the
framebuffers. After that we cross the point of no return, an async
commit would push all that into the worker thread.
- The disabling of encoders and connectors is a bit tricky, since
depending upon the final state we need to select different crtc
helper functions.
- Software tracking is a bit clarified compared to the crtc helpers:
We commit the software state before starting to touch the hardware,
like crtc helpers. But since we just swap them we still have the old
state (i.e. the current hw state) around, which is really handy to
write simple disable functions. So no more
drm_crtc_helper_disable_all_unused_functions kind of fun because
we're leaving unused crtcs/encoders behind. Everything gets shut
down in-order now, which is one of the key differences of the i915
helpers compared to crtc helpers and a really nice additional
guarantee.
- Like with the plane helpers the atomic commit function waits for one
vblank to pass before calling the framebuffer cleanup function.
Compared to Rob's helper approach there's a bunch of upsides:
- All the interfaces which can fail are called in the ->check hook
(i.e. ->best_match and the various ->mode_fixup hooks). This means
that drivers can just reuse those functions and don't need to move
everything into ->atomic_check callbacks. If drivers have no need
for additional constraint checking beyong their existing crtc
helper callbacks they don't need to do anything.
- The actual commit operation is properly stage: First we prepare
framebuffers, which can potentially still fail (due to memory
exhausting). This is important for the async case, where this must
be done synchronously to correctly return errors.
- The output configuration changes (done with crtc helper functions)
and the plane update (using atomic plane helpers) are correctly
interleaved: First we shut down any crtcs that need changing, then
we update planes and finally we enable everything again. Hardware
without GO bits must be more careful with ordering, which this
sequence enables.
- Also for hardware with shared output resources (like display PLLs)
we first must shut down the old configuration before we can enable
the new one. Otherwise we can hit an impossible intermediate state
where there's not enough PLLs (which is the point behind atomic
updates).
v2:
- Ensure that users of ->check update crtc_state->enable correctly.
- Update the legacy state in crtc/plane structures. Eventually we want
to remove that, but for now the drm core still expects this (especially
the plane->fb pointer).
v3: A few changes for better async handling:
- Reorder the software side state commit so that it happens all before
we touch the hardware. This way async support becomes very easy
since we can punt all the actual hw touching to a worker thread. And
as long as we synchronize with that thread (flushing or cancelling,
depending upon what the driver can handle) before we commit the next
software state there's no need for any locking in the worker thread
at all. Which greatly simplifies things.
And as long as we synchronize with all relevant threads we can have
a lot of them (e.g. per-crtc for per-crtc updates) running in
parallel.
- Expose pre/post plane commit steps separately. We need to expose the
actual hw commit step anyway for drivers to be able to implement
asynchronous commit workers. But if we expose pre/post and plane
commit steps individually we allow drivers to selectively use atomic
helpers.
- I've forgotten to call encoder/bridge ->mode_set functions, fix
this.
v4: Add debug output and fix a mixup between current and new state
that resulted in crtcs not getting updated correctly. And in an
Oops ...
v5:
- Be kind to driver writers in the vblank wait functions.. if thing
aren't working yet, and vblank irq will never come, then let's not
block forever.. especially under console-lock.
- Correctly clear connector_state->best_encoder when disabling.
Spotted while trying to understand a report from Rob Clark.
- Only steal encoder if it actually changed, otherwise hilarity ensues
if we steal from the current connector and so set the ->crtc pointer
unexpectedly to NULL. Reported by Rob Clark.
- Bail out in disable_outputs if an output currently doesn't have a
best_encoder - this means it's already disabled.
v6: Fixupe kerneldoc as reported by Paulo. And also fix up kerneldoc
in drm_crtc.h.
v7: Take ownership of the atomic state and clean it up with
drm_atomic_state_free().
v8 Various improvements all over:
- Polish code comments and kerneldoc.
- Improve debug output to make sure all failure cases are logged.
- Treat enabled crtc with no connectors as invalid input from userspace.
- Don't ignore the return value from mode_fixup().
v9:
- Improve debug output for crtc_state->mode_changed.
v10:
- Fixup the vblank waiting code to properly balance the vblank_get/put
calls.
- Better comments when checking/computing crtc->mode_changed
v11: Fixup the encoder stealing logic: We can't look at encoder->crtc
since that's not in the atomic state structures and might be updated
asynchronously in and async commit. Instead we need to inspect all the
connector states and check whether the encoder is currently in used
and if so, on which crtc.
v12: Review from Sean:
- A few spelling fixes.
- Flatten control flow indent by converting if blocks to early
continue/return in 2 places.
- Capture connectors_for_crtc return value in int num_connectors
instead of bool has_connectors and do an explicit int->bool
conversion with !!. I think the helper is more useful for drivers if
it returns the number of connectors (e.g. to detect cloning
configurations), so decided to keep that return value.
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-09-16 09:50:47 -06:00
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/*
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* We can only steal an encoder coming from a connector, which means we
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* must already hold the connection_mutex.
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*/
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WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
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|
|
DRM_DEBUG_KMS("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n",
|
|
|
|
|
encoder->base.id, encoder->name,
|
|
|
|
|
encoder_crtc->base.id);
|
|
|
|
|
|
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc);
|
|
|
|
|
if (IS_ERR(crtc_state))
|
|
|
|
|
return PTR_ERR(crtc_state);
|
|
|
|
|
|
|
|
|
|
crtc_state->mode_changed = true;
|
|
|
|
|
|
|
|
|
|
list_for_each_entry(connector, &config->connector_list, head) {
|
|
|
|
|
if (connector->state->best_encoder != encoder)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
DRM_DEBUG_KMS("Stealing encoder from [CONNECTOR:%d:%s]\n",
|
|
|
|
|
connector->base.id,
|
|
|
|
|
connector->name);
|
|
|
|
|
|
|
|
|
|
connector_state = drm_atomic_get_connector_state(state,
|
|
|
|
|
connector);
|
|
|
|
|
if (IS_ERR(connector_state))
|
|
|
|
|
return PTR_ERR(connector_state);
|
|
|
|
|
|
2014-07-27 05:46:52 -06:00
|
|
|
ret = drm_atomic_set_crtc_for_connector(connector_state, NULL);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
drm: Atomic crtc/connector updates using crtc/plane helper interfaces
So this is finally the integration of the crtc and plane helper
interfaces into the atomic helper functions.
In the check function we now have a few steps:
- First we update the output routing and figure out which crtcs need a
full mode set. Suitable encoders are selected using ->best_encoder,
with the same semantics as the crtc helpers of implicitly disabling
all connectors currently using the encoder.
- Then we pull all other connectors into the state update which feed
from a crtc which changes. This must be done do catch mode changes
and similar updates - atomic updates are differences on top of the
current state.
- Then we call all the various ->mode_fixup to compute the adjusted
mode. Note that here we have a slight semantic difference compared
to the crtc helpers: We have not yet updated the encoder->crtc link
when calling the encoder's ->mode_fixup function. But that's a
requirement when converting to atomic since we want to prepare the
entire state completely contained with the over drm_atomic_state
structure. So this must be carefully checked when converting drivers
over to atomic helpers.
- Finally we do call the atomic_check functions on planes and crtcs.
The commit function is also quite a beast:
- The only step that can fail is done first, namely pinning the
framebuffers. After that we cross the point of no return, an async
commit would push all that into the worker thread.
- The disabling of encoders and connectors is a bit tricky, since
depending upon the final state we need to select different crtc
helper functions.
- Software tracking is a bit clarified compared to the crtc helpers:
We commit the software state before starting to touch the hardware,
like crtc helpers. But since we just swap them we still have the old
state (i.e. the current hw state) around, which is really handy to
write simple disable functions. So no more
drm_crtc_helper_disable_all_unused_functions kind of fun because
we're leaving unused crtcs/encoders behind. Everything gets shut
down in-order now, which is one of the key differences of the i915
helpers compared to crtc helpers and a really nice additional
guarantee.
- Like with the plane helpers the atomic commit function waits for one
vblank to pass before calling the framebuffer cleanup function.
Compared to Rob's helper approach there's a bunch of upsides:
- All the interfaces which can fail are called in the ->check hook
(i.e. ->best_match and the various ->mode_fixup hooks). This means
that drivers can just reuse those functions and don't need to move
everything into ->atomic_check callbacks. If drivers have no need
for additional constraint checking beyong their existing crtc
helper callbacks they don't need to do anything.
- The actual commit operation is properly stage: First we prepare
framebuffers, which can potentially still fail (due to memory
exhausting). This is important for the async case, where this must
be done synchronously to correctly return errors.
- The output configuration changes (done with crtc helper functions)
and the plane update (using atomic plane helpers) are correctly
interleaved: First we shut down any crtcs that need changing, then
we update planes and finally we enable everything again. Hardware
without GO bits must be more careful with ordering, which this
sequence enables.
- Also for hardware with shared output resources (like display PLLs)
we first must shut down the old configuration before we can enable
the new one. Otherwise we can hit an impossible intermediate state
where there's not enough PLLs (which is the point behind atomic
updates).
v2:
- Ensure that users of ->check update crtc_state->enable correctly.
- Update the legacy state in crtc/plane structures. Eventually we want
to remove that, but for now the drm core still expects this (especially
the plane->fb pointer).
v3: A few changes for better async handling:
- Reorder the software side state commit so that it happens all before
we touch the hardware. This way async support becomes very easy
since we can punt all the actual hw touching to a worker thread. And
as long as we synchronize with that thread (flushing or cancelling,
depending upon what the driver can handle) before we commit the next
software state there's no need for any locking in the worker thread
at all. Which greatly simplifies things.
And as long as we synchronize with all relevant threads we can have
a lot of them (e.g. per-crtc for per-crtc updates) running in
parallel.
- Expose pre/post plane commit steps separately. We need to expose the
actual hw commit step anyway for drivers to be able to implement
asynchronous commit workers. But if we expose pre/post and plane
commit steps individually we allow drivers to selectively use atomic
helpers.
- I've forgotten to call encoder/bridge ->mode_set functions, fix
this.
v4: Add debug output and fix a mixup between current and new state
that resulted in crtcs not getting updated correctly. And in an
Oops ...
v5:
- Be kind to driver writers in the vblank wait functions.. if thing
aren't working yet, and vblank irq will never come, then let's not
block forever.. especially under console-lock.
- Correctly clear connector_state->best_encoder when disabling.
Spotted while trying to understand a report from Rob Clark.
- Only steal encoder if it actually changed, otherwise hilarity ensues
if we steal from the current connector and so set the ->crtc pointer
unexpectedly to NULL. Reported by Rob Clark.
- Bail out in disable_outputs if an output currently doesn't have a
best_encoder - this means it's already disabled.
v6: Fixupe kerneldoc as reported by Paulo. And also fix up kerneldoc
in drm_crtc.h.
v7: Take ownership of the atomic state and clean it up with
drm_atomic_state_free().
v8 Various improvements all over:
- Polish code comments and kerneldoc.
- Improve debug output to make sure all failure cases are logged.
- Treat enabled crtc with no connectors as invalid input from userspace.
- Don't ignore the return value from mode_fixup().
v9:
- Improve debug output for crtc_state->mode_changed.
v10:
- Fixup the vblank waiting code to properly balance the vblank_get/put
calls.
- Better comments when checking/computing crtc->mode_changed
v11: Fixup the encoder stealing logic: We can't look at encoder->crtc
since that's not in the atomic state structures and might be updated
asynchronously in and async commit. Instead we need to inspect all the
connector states and check whether the encoder is currently in used
and if so, on which crtc.
v12: Review from Sean:
- A few spelling fixes.
- Flatten control flow indent by converting if blocks to early
continue/return in 2 places.
- Capture connectors_for_crtc return value in int num_connectors
instead of bool has_connectors and do an explicit int->bool
conversion with !!. I think the helper is more useful for drivers if
it returns the number of connectors (e.g. to detect cloning
configurations), so decided to keep that return value.
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-09-16 09:50:47 -06:00
|
|
|
connector_state->best_encoder = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
update_connector_routing(struct drm_atomic_state *state, int conn_idx)
|
|
|
|
|
{
|
|
|
|
|
struct drm_connector_helper_funcs *funcs;
|
|
|
|
|
struct drm_encoder *new_encoder;
|
|
|
|
|
struct drm_crtc *encoder_crtc;
|
|
|
|
|
struct drm_connector *connector;
|
|
|
|
|
struct drm_connector_state *connector_state;
|
|
|
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
|
int idx, ret;
|
|
|
|
|
|
|
|
|
|
connector = state->connectors[conn_idx];
|
|
|
|
|
connector_state = state->connector_states[conn_idx];
|
|
|
|
|
|
|
|
|
|
if (!connector)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
DRM_DEBUG_KMS("Updating routing for [CONNECTOR:%d:%s]\n",
|
|
|
|
|
connector->base.id,
|
|
|
|
|
connector->name);
|
|
|
|
|
|
|
|
|
|
if (connector->state->crtc != connector_state->crtc) {
|
|
|
|
|
if (connector->state->crtc) {
|
|
|
|
|
idx = drm_crtc_index(connector->state->crtc);
|
|
|
|
|
|
|
|
|
|
crtc_state = state->crtc_states[idx];
|
|
|
|
|
crtc_state->mode_changed = true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (connector_state->crtc) {
|
|
|
|
|
idx = drm_crtc_index(connector_state->crtc);
|
|
|
|
|
|
|
|
|
|
crtc_state = state->crtc_states[idx];
|
|
|
|
|
crtc_state->mode_changed = true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!connector_state->crtc) {
|
|
|
|
|
DRM_DEBUG_KMS("Disabling [CONNECTOR:%d:%s]\n",
|
|
|
|
|
connector->base.id,
|
|
|
|
|
connector->name);
|
|
|
|
|
|
|
|
|
|
connector_state->best_encoder = NULL;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
funcs = connector->helper_private;
|
|
|
|
|
new_encoder = funcs->best_encoder(connector);
|
|
|
|
|
|
|
|
|
|
if (!new_encoder) {
|
|
|
|
|
DRM_DEBUG_KMS("No suitable encoder found for [CONNECTOR:%d:%s]\n",
|
|
|
|
|
connector->base.id,
|
|
|
|
|
connector->name);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (new_encoder == connector_state->best_encoder) {
|
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n",
|
|
|
|
|
connector->base.id,
|
|
|
|
|
connector->name,
|
|
|
|
|
new_encoder->base.id,
|
|
|
|
|
new_encoder->name,
|
|
|
|
|
connector_state->crtc->base.id);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
encoder_crtc = get_current_crtc_for_encoder(state->dev,
|
|
|
|
|
new_encoder);
|
|
|
|
|
|
|
|
|
|
if (encoder_crtc) {
|
|
|
|
|
ret = steal_encoder(state, new_encoder, encoder_crtc);
|
|
|
|
|
if (ret) {
|
|
|
|
|
DRM_DEBUG_KMS("Encoder stealing failed for [CONNECTOR:%d:%s]\n",
|
|
|
|
|
connector->base.id,
|
|
|
|
|
connector->name);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
connector_state->best_encoder = new_encoder;
|
|
|
|
|
idx = drm_crtc_index(connector_state->crtc);
|
|
|
|
|
|
|
|
|
|
crtc_state = state->crtc_states[idx];
|
|
|
|
|
crtc_state->mode_changed = true;
|
|
|
|
|
|
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n",
|
|
|
|
|
connector->base.id,
|
|
|
|
|
connector->name,
|
|
|
|
|
new_encoder->base.id,
|
|
|
|
|
new_encoder->name,
|
|
|
|
|
connector_state->crtc->base.id);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
mode_fixup(struct drm_atomic_state *state)
|
|
|
|
|
{
|
|
|
|
|
int ncrtcs = state->dev->mode_config.num_crtc;
|
|
|
|
|
int nconnectors = state->dev->mode_config.num_connector;
|
|
|
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
|
struct drm_connector_state *conn_state;
|
|
|
|
|
int i;
|
|
|
|
|
bool ret;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
crtc_state = state->crtc_states[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc_state || !crtc_state->mode_changed)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
struct drm_encoder_helper_funcs *funcs;
|
|
|
|
|
struct drm_encoder *encoder;
|
|
|
|
|
|
|
|
|
|
conn_state = state->connector_states[i];
|
|
|
|
|
|
|
|
|
|
if (!conn_state)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc);
|
|
|
|
|
|
|
|
|
|
if (!conn_state->crtc || !conn_state->best_encoder)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
crtc_state =
|
|
|
|
|
state->crtc_states[drm_crtc_index(conn_state->crtc)];
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Each encoder has at most one connector (since we always steal
|
|
|
|
|
* it away), so we won't call ->mode_fixup twice.
|
|
|
|
|
*/
|
|
|
|
|
encoder = conn_state->best_encoder;
|
|
|
|
|
funcs = encoder->helper_private;
|
|
|
|
|
|
|
|
|
|
if (encoder->bridge && encoder->bridge->funcs->mode_fixup) {
|
|
|
|
|
ret = encoder->bridge->funcs->mode_fixup(
|
|
|
|
|
encoder->bridge, &crtc_state->mode,
|
|
|
|
|
&crtc_state->adjusted_mode);
|
|
|
|
|
if (!ret) {
|
|
|
|
|
DRM_DEBUG_KMS("Bridge fixup failed\n");
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
ret = funcs->mode_fixup(encoder, &crtc_state->mode,
|
|
|
|
|
&crtc_state->adjusted_mode);
|
|
|
|
|
if (!ret) {
|
|
|
|
|
DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n",
|
|
|
|
|
encoder->base.id, encoder->name);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
|
|
|
struct drm_crtc *crtc;
|
|
|
|
|
|
|
|
|
|
crtc_state = state->crtc_states[i];
|
|
|
|
|
crtc = state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc_state || !crtc_state->mode_changed)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
|
ret = funcs->mode_fixup(crtc, &crtc_state->mode,
|
|
|
|
|
&crtc_state->adjusted_mode);
|
|
|
|
|
if (!ret) {
|
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n",
|
|
|
|
|
crtc->base.id);
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
drm_atomic_helper_check_prepare(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *state)
|
|
|
|
|
{
|
|
|
|
|
int ncrtcs = dev->mode_config.num_crtc;
|
|
|
|
|
int nconnectors = dev->mode_config.num_connector;
|
|
|
|
|
struct drm_crtc *crtc;
|
|
|
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
crtc = state->crtcs[i];
|
|
|
|
|
crtc_state = state->crtc_states[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
|
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] mode changed\n",
|
|
|
|
|
crtc->base.id);
|
|
|
|
|
crtc_state->mode_changed = true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (crtc->state->enable != crtc_state->enable) {
|
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] enable changed\n",
|
|
|
|
|
crtc->base.id);
|
|
|
|
|
crtc_state->mode_changed = true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
/*
|
|
|
|
|
* This only sets crtc->mode_changed for routing changes,
|
|
|
|
|
* drivers must set crtc->mode_changed themselves when connector
|
|
|
|
|
* properties need to be updated.
|
|
|
|
|
*/
|
|
|
|
|
ret = update_connector_routing(state, i);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* After all the routing has been prepared we need to add in any
|
|
|
|
|
* connector which is itself unchanged, but who's crtc changes it's
|
|
|
|
|
* configuration. This must be done before calling mode_fixup in case a
|
|
|
|
|
* crtc only changed its mode but has the same set of connectors.
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
int num_connectors;
|
|
|
|
|
|
|
|
|
|
crtc = state->crtcs[i];
|
|
|
|
|
crtc_state = state->crtc_states[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc || !crtc_state->mode_changed)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] needs full modeset, enable: %c\n",
|
|
|
|
|
crtc->base.id,
|
|
|
|
|
crtc_state->enable ? 'y' : 'n');
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_add_affected_connectors(state, crtc);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
num_connectors = drm_atomic_connectors_for_crtc(state,
|
|
|
|
|
crtc);
|
|
|
|
|
|
|
|
|
|
if (crtc_state->enable != !!num_connectors) {
|
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n",
|
|
|
|
|
crtc->base.id);
|
|
|
|
|
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return mode_fixup(state);
|
|
|
|
|
}
|
|
|
|
|
|
2014-11-04 16:14:14 -07:00
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_check - validate state object
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @state: the driver state object
|
|
|
|
|
*
|
|
|
|
|
* Check the state object to see if the requested state is physically possible.
|
|
|
|
|
* Only crtcs and planes have check callbacks, so for any additional (global)
|
|
|
|
|
* checking that a driver needs it can simply wrap that around this function.
|
|
|
|
|
* Drivers without such needs can directly use this as their ->atomic_check()
|
|
|
|
|
* callback.
|
|
|
|
|
*
|
|
|
|
|
* RETURNS
|
|
|
|
|
* Zero for success or -errno
|
|
|
|
|
*/
|
|
|
|
|
int drm_atomic_helper_check(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *state)
|
|
|
|
|
{
|
|
|
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
|
|
|
int ncrtcs = dev->mode_config.num_crtc;
|
|
|
|
|
int i, ret = 0;
|
|
|
|
|
|
drm: Atomic crtc/connector updates using crtc/plane helper interfaces
So this is finally the integration of the crtc and plane helper
interfaces into the atomic helper functions.
In the check function we now have a few steps:
- First we update the output routing and figure out which crtcs need a
full mode set. Suitable encoders are selected using ->best_encoder,
with the same semantics as the crtc helpers of implicitly disabling
all connectors currently using the encoder.
- Then we pull all other connectors into the state update which feed
from a crtc which changes. This must be done do catch mode changes
and similar updates - atomic updates are differences on top of the
current state.
- Then we call all the various ->mode_fixup to compute the adjusted
mode. Note that here we have a slight semantic difference compared
to the crtc helpers: We have not yet updated the encoder->crtc link
when calling the encoder's ->mode_fixup function. But that's a
requirement when converting to atomic since we want to prepare the
entire state completely contained with the over drm_atomic_state
structure. So this must be carefully checked when converting drivers
over to atomic helpers.
- Finally we do call the atomic_check functions on planes and crtcs.
The commit function is also quite a beast:
- The only step that can fail is done first, namely pinning the
framebuffers. After that we cross the point of no return, an async
commit would push all that into the worker thread.
- The disabling of encoders and connectors is a bit tricky, since
depending upon the final state we need to select different crtc
helper functions.
- Software tracking is a bit clarified compared to the crtc helpers:
We commit the software state before starting to touch the hardware,
like crtc helpers. But since we just swap them we still have the old
state (i.e. the current hw state) around, which is really handy to
write simple disable functions. So no more
drm_crtc_helper_disable_all_unused_functions kind of fun because
we're leaving unused crtcs/encoders behind. Everything gets shut
down in-order now, which is one of the key differences of the i915
helpers compared to crtc helpers and a really nice additional
guarantee.
- Like with the plane helpers the atomic commit function waits for one
vblank to pass before calling the framebuffer cleanup function.
Compared to Rob's helper approach there's a bunch of upsides:
- All the interfaces which can fail are called in the ->check hook
(i.e. ->best_match and the various ->mode_fixup hooks). This means
that drivers can just reuse those functions and don't need to move
everything into ->atomic_check callbacks. If drivers have no need
for additional constraint checking beyong their existing crtc
helper callbacks they don't need to do anything.
- The actual commit operation is properly stage: First we prepare
framebuffers, which can potentially still fail (due to memory
exhausting). This is important for the async case, where this must
be done synchronously to correctly return errors.
- The output configuration changes (done with crtc helper functions)
and the plane update (using atomic plane helpers) are correctly
interleaved: First we shut down any crtcs that need changing, then
we update planes and finally we enable everything again. Hardware
without GO bits must be more careful with ordering, which this
sequence enables.
- Also for hardware with shared output resources (like display PLLs)
we first must shut down the old configuration before we can enable
the new one. Otherwise we can hit an impossible intermediate state
where there's not enough PLLs (which is the point behind atomic
updates).
v2:
- Ensure that users of ->check update crtc_state->enable correctly.
- Update the legacy state in crtc/plane structures. Eventually we want
to remove that, but for now the drm core still expects this (especially
the plane->fb pointer).
v3: A few changes for better async handling:
- Reorder the software side state commit so that it happens all before
we touch the hardware. This way async support becomes very easy
since we can punt all the actual hw touching to a worker thread. And
as long as we synchronize with that thread (flushing or cancelling,
depending upon what the driver can handle) before we commit the next
software state there's no need for any locking in the worker thread
at all. Which greatly simplifies things.
And as long as we synchronize with all relevant threads we can have
a lot of them (e.g. per-crtc for per-crtc updates) running in
parallel.
- Expose pre/post plane commit steps separately. We need to expose the
actual hw commit step anyway for drivers to be able to implement
asynchronous commit workers. But if we expose pre/post and plane
commit steps individually we allow drivers to selectively use atomic
helpers.
- I've forgotten to call encoder/bridge ->mode_set functions, fix
this.
v4: Add debug output and fix a mixup between current and new state
that resulted in crtcs not getting updated correctly. And in an
Oops ...
v5:
- Be kind to driver writers in the vblank wait functions.. if thing
aren't working yet, and vblank irq will never come, then let's not
block forever.. especially under console-lock.
- Correctly clear connector_state->best_encoder when disabling.
Spotted while trying to understand a report from Rob Clark.
- Only steal encoder if it actually changed, otherwise hilarity ensues
if we steal from the current connector and so set the ->crtc pointer
unexpectedly to NULL. Reported by Rob Clark.
- Bail out in disable_outputs if an output currently doesn't have a
best_encoder - this means it's already disabled.
v6: Fixupe kerneldoc as reported by Paulo. And also fix up kerneldoc
in drm_crtc.h.
v7: Take ownership of the atomic state and clean it up with
drm_atomic_state_free().
v8 Various improvements all over:
- Polish code comments and kerneldoc.
- Improve debug output to make sure all failure cases are logged.
- Treat enabled crtc with no connectors as invalid input from userspace.
- Don't ignore the return value from mode_fixup().
v9:
- Improve debug output for crtc_state->mode_changed.
v10:
- Fixup the vblank waiting code to properly balance the vblank_get/put
calls.
- Better comments when checking/computing crtc->mode_changed
v11: Fixup the encoder stealing logic: We can't look at encoder->crtc
since that's not in the atomic state structures and might be updated
asynchronously in and async commit. Instead we need to inspect all the
connector states and check whether the encoder is currently in used
and if so, on which crtc.
v12: Review from Sean:
- A few spelling fixes.
- Flatten control flow indent by converting if blocks to early
continue/return in 2 places.
- Capture connectors_for_crtc return value in int num_connectors
instead of bool has_connectors and do an explicit int->bool
conversion with !!. I think the helper is more useful for drivers if
it returns the number of connectors (e.g. to detect cloning
configurations), so decided to keep that return value.
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-09-16 09:50:47 -06:00
|
|
|
ret = drm_atomic_helper_check_prepare(dev, state);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
|
2014-11-04 16:14:14 -07:00
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
|
|
|
struct drm_plane_helper_funcs *funcs;
|
|
|
|
|
struct drm_plane *plane = state->planes[i];
|
|
|
|
|
struct drm_plane_state *plane_state = state->plane_states[i];
|
|
|
|
|
|
|
|
|
|
if (!plane)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
|
|
|
|
|
|
drm_atomic_helper_plane_changed(state, plane_state, plane);
|
|
|
|
|
|
|
|
|
|
if (!funcs || !funcs->atomic_check)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
ret = funcs->atomic_check(plane, plane_state);
|
|
|
|
|
if (ret) {
|
|
|
|
|
DRM_DEBUG_KMS("[PLANE:%d] atomic check failed\n",
|
|
|
|
|
plane->base.id);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
|
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
|
|
|
|
|
|
if (!funcs || !funcs->atomic_check)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
ret = funcs->atomic_check(crtc, state->crtc_states[i]);
|
|
|
|
|
if (ret) {
|
|
|
|
|
DRM_DEBUG_KMS("[CRTC:%d] atomic check failed\n",
|
|
|
|
|
crtc->base.id);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_check);
|
|
|
|
|
|
drm: Atomic crtc/connector updates using crtc/plane helper interfaces
So this is finally the integration of the crtc and plane helper
interfaces into the atomic helper functions.
In the check function we now have a few steps:
- First we update the output routing and figure out which crtcs need a
full mode set. Suitable encoders are selected using ->best_encoder,
with the same semantics as the crtc helpers of implicitly disabling
all connectors currently using the encoder.
- Then we pull all other connectors into the state update which feed
from a crtc which changes. This must be done do catch mode changes
and similar updates - atomic updates are differences on top of the
current state.
- Then we call all the various ->mode_fixup to compute the adjusted
mode. Note that here we have a slight semantic difference compared
to the crtc helpers: We have not yet updated the encoder->crtc link
when calling the encoder's ->mode_fixup function. But that's a
requirement when converting to atomic since we want to prepare the
entire state completely contained with the over drm_atomic_state
structure. So this must be carefully checked when converting drivers
over to atomic helpers.
- Finally we do call the atomic_check functions on planes and crtcs.
The commit function is also quite a beast:
- The only step that can fail is done first, namely pinning the
framebuffers. After that we cross the point of no return, an async
commit would push all that into the worker thread.
- The disabling of encoders and connectors is a bit tricky, since
depending upon the final state we need to select different crtc
helper functions.
- Software tracking is a bit clarified compared to the crtc helpers:
We commit the software state before starting to touch the hardware,
like crtc helpers. But since we just swap them we still have the old
state (i.e. the current hw state) around, which is really handy to
write simple disable functions. So no more
drm_crtc_helper_disable_all_unused_functions kind of fun because
we're leaving unused crtcs/encoders behind. Everything gets shut
down in-order now, which is one of the key differences of the i915
helpers compared to crtc helpers and a really nice additional
guarantee.
- Like with the plane helpers the atomic commit function waits for one
vblank to pass before calling the framebuffer cleanup function.
Compared to Rob's helper approach there's a bunch of upsides:
- All the interfaces which can fail are called in the ->check hook
(i.e. ->best_match and the various ->mode_fixup hooks). This means
that drivers can just reuse those functions and don't need to move
everything into ->atomic_check callbacks. If drivers have no need
for additional constraint checking beyong their existing crtc
helper callbacks they don't need to do anything.
- The actual commit operation is properly stage: First we prepare
framebuffers, which can potentially still fail (due to memory
exhausting). This is important for the async case, where this must
be done synchronously to correctly return errors.
- The output configuration changes (done with crtc helper functions)
and the plane update (using atomic plane helpers) are correctly
interleaved: First we shut down any crtcs that need changing, then
we update planes and finally we enable everything again. Hardware
without GO bits must be more careful with ordering, which this
sequence enables.
- Also for hardware with shared output resources (like display PLLs)
we first must shut down the old configuration before we can enable
the new one. Otherwise we can hit an impossible intermediate state
where there's not enough PLLs (which is the point behind atomic
updates).
v2:
- Ensure that users of ->check update crtc_state->enable correctly.
- Update the legacy state in crtc/plane structures. Eventually we want
to remove that, but for now the drm core still expects this (especially
the plane->fb pointer).
v3: A few changes for better async handling:
- Reorder the software side state commit so that it happens all before
we touch the hardware. This way async support becomes very easy
since we can punt all the actual hw touching to a worker thread. And
as long as we synchronize with that thread (flushing or cancelling,
depending upon what the driver can handle) before we commit the next
software state there's no need for any locking in the worker thread
at all. Which greatly simplifies things.
And as long as we synchronize with all relevant threads we can have
a lot of them (e.g. per-crtc for per-crtc updates) running in
parallel.
- Expose pre/post plane commit steps separately. We need to expose the
actual hw commit step anyway for drivers to be able to implement
asynchronous commit workers. But if we expose pre/post and plane
commit steps individually we allow drivers to selectively use atomic
helpers.
- I've forgotten to call encoder/bridge ->mode_set functions, fix
this.
v4: Add debug output and fix a mixup between current and new state
that resulted in crtcs not getting updated correctly. And in an
Oops ...
v5:
- Be kind to driver writers in the vblank wait functions.. if thing
aren't working yet, and vblank irq will never come, then let's not
block forever.. especially under console-lock.
- Correctly clear connector_state->best_encoder when disabling.
Spotted while trying to understand a report from Rob Clark.
- Only steal encoder if it actually changed, otherwise hilarity ensues
if we steal from the current connector and so set the ->crtc pointer
unexpectedly to NULL. Reported by Rob Clark.
- Bail out in disable_outputs if an output currently doesn't have a
best_encoder - this means it's already disabled.
v6: Fixupe kerneldoc as reported by Paulo. And also fix up kerneldoc
in drm_crtc.h.
v7: Take ownership of the atomic state and clean it up with
drm_atomic_state_free().
v8 Various improvements all over:
- Polish code comments and kerneldoc.
- Improve debug output to make sure all failure cases are logged.
- Treat enabled crtc with no connectors as invalid input from userspace.
- Don't ignore the return value from mode_fixup().
v9:
- Improve debug output for crtc_state->mode_changed.
v10:
- Fixup the vblank waiting code to properly balance the vblank_get/put
calls.
- Better comments when checking/computing crtc->mode_changed
v11: Fixup the encoder stealing logic: We can't look at encoder->crtc
since that's not in the atomic state structures and might be updated
asynchronously in and async commit. Instead we need to inspect all the
connector states and check whether the encoder is currently in used
and if so, on which crtc.
v12: Review from Sean:
- A few spelling fixes.
- Flatten control flow indent by converting if blocks to early
continue/return in 2 places.
- Capture connectors_for_crtc return value in int num_connectors
instead of bool has_connectors and do an explicit int->bool
conversion with !!. I think the helper is more useful for drivers if
it returns the number of connectors (e.g. to detect cloning
configurations), so decided to keep that return value.
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-09-16 09:50:47 -06:00
|
|
|
static void
|
|
|
|
|
disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
|
|
{
|
|
|
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
|
|
int nconnectors = old_state->dev->mode_config.num_connector;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
struct drm_connector_state *old_conn_state;
|
|
|
|
|
struct drm_connector *connector;
|
|
|
|
|
struct drm_encoder_helper_funcs *funcs;
|
|
|
|
|
struct drm_encoder *encoder;
|
|
|
|
|
|
|
|
|
|
old_conn_state = old_state->connector_states[i];
|
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
|
|
|
|
|
|
/* Shut down everything that's in the changeset and currently
|
|
|
|
|
* still on. So need to check the old, saved state. */
|
|
|
|
|
if (!old_conn_state || !old_conn_state->crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
encoder = connector->state->best_encoder;
|
|
|
|
|
|
|
|
|
|
if (!encoder)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = encoder->helper_private;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Each encoder has at most one connector (since we always steal
|
|
|
|
|
* it away), so we won't call call disable hooks twice.
|
|
|
|
|
*/
|
|
|
|
|
if (encoder->bridge)
|
|
|
|
|
encoder->bridge->funcs->disable(encoder->bridge);
|
|
|
|
|
|
|
|
|
|
/* Right function depends upon target state. */
|
|
|
|
|
if (connector->state->crtc)
|
|
|
|
|
funcs->prepare(encoder);
|
|
|
|
|
else if (funcs->disable)
|
|
|
|
|
funcs->disable(encoder);
|
|
|
|
|
else
|
|
|
|
|
funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
|
|
|
|
|
|
|
|
|
|
if (encoder->bridge)
|
|
|
|
|
encoder->bridge->funcs->post_disable(encoder->bridge);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
|
|
|
struct drm_crtc *crtc;
|
|
|
|
|
|
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
/* Shut down everything that needs a full modeset. */
|
|
|
|
|
if (!crtc || !crtc->state->mode_changed)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
|
|
|
|
|
|
/* Right function depends upon target state. */
|
|
|
|
|
if (crtc->state->enable)
|
|
|
|
|
funcs->prepare(crtc);
|
|
|
|
|
else if (funcs->disable)
|
|
|
|
|
funcs->disable(crtc);
|
|
|
|
|
else
|
|
|
|
|
funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
|
|
{
|
|
|
|
|
int nconnectors = dev->mode_config.num_connector;
|
|
|
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
/* clear out existing links */
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
struct drm_connector *connector;
|
|
|
|
|
|
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
|
|
|
|
|
|
if (!connector || !connector->encoder)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
WARN_ON(!connector->encoder->crtc);
|
|
|
|
|
|
|
|
|
|
connector->encoder->crtc = NULL;
|
|
|
|
|
connector->encoder = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* set new links */
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
struct drm_connector *connector;
|
|
|
|
|
|
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
|
|
|
|
|
|
if (!connector || !connector->state->crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (WARN_ON(!connector->state->best_encoder))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
connector->encoder = connector->state->best_encoder;
|
|
|
|
|
connector->encoder->crtc = connector->state->crtc;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* set legacy state in the crtc structure */
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc *crtc;
|
|
|
|
|
|
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
crtc->mode = crtc->state->mode;
|
|
|
|
|
crtc->enabled = crtc->state->enable;
|
|
|
|
|
crtc->x = crtc->primary->state->src_x >> 16;
|
|
|
|
|
crtc->y = crtc->primary->state->src_y >> 16;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
|
|
{
|
|
|
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
|
|
int nconnectors = old_state->dev->mode_config.num_connector;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
|
|
|
struct drm_crtc *crtc;
|
|
|
|
|
|
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc || !crtc->state->mode_changed)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
|
|
|
|
|
|
if (crtc->state->enable)
|
|
|
|
|
funcs->mode_set_nofb(crtc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
struct drm_connector *connector;
|
|
|
|
|
struct drm_crtc_state *new_crtc_state;
|
|
|
|
|
struct drm_encoder_helper_funcs *funcs;
|
|
|
|
|
struct drm_encoder *encoder;
|
|
|
|
|
struct drm_display_mode *mode, *adjusted_mode;
|
|
|
|
|
|
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
|
|
|
|
|
|
if (!connector || !connector->state->best_encoder)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
encoder = connector->state->best_encoder;
|
|
|
|
|
funcs = encoder->helper_private;
|
|
|
|
|
new_crtc_state = connector->state->crtc->state;
|
|
|
|
|
mode = &new_crtc_state->mode;
|
|
|
|
|
adjusted_mode = &new_crtc_state->adjusted_mode;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Each encoder has at most one connector (since we always steal
|
|
|
|
|
* it away), so we won't call call mode_set hooks twice.
|
|
|
|
|
*/
|
|
|
|
|
funcs->mode_set(encoder, mode, adjusted_mode);
|
|
|
|
|
|
|
|
|
|
if (encoder->bridge && encoder->bridge->funcs->mode_set)
|
|
|
|
|
encoder->bridge->funcs->mode_set(encoder->bridge,
|
|
|
|
|
mode, adjusted_mode);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_commit_pre_planes - modeset commit before plane updates
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @state: atomic state
|
|
|
|
|
*
|
|
|
|
|
* This function commits the modeset changes that need to be committed before
|
|
|
|
|
* updating planes. It shuts down all the outputs that need to be shut down and
|
|
|
|
|
* prepares them (if required) with the new mode.
|
|
|
|
|
*/
|
|
|
|
|
void drm_atomic_helper_commit_pre_planes(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *state)
|
|
|
|
|
{
|
|
|
|
|
disable_outputs(dev, state);
|
|
|
|
|
set_routing_links(dev, state);
|
|
|
|
|
crtc_set_mode(dev, state);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_commit_post_planes - modeset commit after plane updates
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @old_state: atomic state object with old state structures
|
|
|
|
|
*
|
|
|
|
|
* This function commits the modeset changes that need to be committed after
|
|
|
|
|
* updating planes: It enables all the outputs with the new configuration which
|
|
|
|
|
* had to be turned off for the update.
|
|
|
|
|
*/
|
|
|
|
|
void drm_atomic_helper_commit_post_planes(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *old_state)
|
|
|
|
|
{
|
|
|
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
|
|
int nconnectors = old_state->dev->mode_config.num_connector;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
|
|
|
struct drm_crtc *crtc;
|
|
|
|
|
|
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
/* Need to filter out CRTCs where only planes change. */
|
|
|
|
|
if (!crtc || !crtc->state->mode_changed)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
|
|
|
|
|
|
if (crtc->state->enable)
|
|
|
|
|
funcs->commit(crtc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
struct drm_connector *connector;
|
|
|
|
|
struct drm_encoder_helper_funcs *funcs;
|
|
|
|
|
struct drm_encoder *encoder;
|
|
|
|
|
|
|
|
|
|
connector = old_state->connectors[i];
|
|
|
|
|
|
|
|
|
|
if (!connector || !connector->state->best_encoder)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
encoder = connector->state->best_encoder;
|
|
|
|
|
funcs = encoder->helper_private;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Each encoder has at most one connector (since we always steal
|
|
|
|
|
* it away), so we won't call call enable hooks twice.
|
|
|
|
|
*/
|
|
|
|
|
if (encoder->bridge)
|
|
|
|
|
encoder->bridge->funcs->pre_enable(encoder->bridge);
|
|
|
|
|
|
|
|
|
|
funcs->commit(encoder);
|
|
|
|
|
|
|
|
|
|
if (encoder->bridge)
|
|
|
|
|
encoder->bridge->funcs->enable(encoder->bridge);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes);
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
wait_for_vblanks(struct drm_device *dev, struct drm_atomic_state *old_state)
|
|
|
|
|
{
|
|
|
|
|
struct drm_crtc *crtc;
|
|
|
|
|
struct drm_crtc_state *old_crtc_state;
|
|
|
|
|
int ncrtcs = old_state->dev->mode_config.num_crtc;
|
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
|
old_crtc_state = old_state->crtc_states[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* No one cares about the old state, so abuse it for tracking
|
|
|
|
|
* and store whether we hold a vblank reference (and should do a
|
|
|
|
|
* vblank wait) in the ->enable boolean. */
|
|
|
|
|
old_crtc_state->enable = false;
|
|
|
|
|
|
|
|
|
|
if (!crtc->state->enable)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
ret = drm_crtc_vblank_get(crtc);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
old_crtc_state->enable = true;
|
|
|
|
|
old_crtc_state->last_vblank_count = drm_vblank_count(dev, i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
crtc = old_state->crtcs[i];
|
|
|
|
|
old_crtc_state = old_state->crtc_states[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc || !old_crtc_state->enable)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
ret = wait_event_timeout(dev->vblank[i].queue,
|
|
|
|
|
old_crtc_state->last_vblank_count !=
|
|
|
|
|
drm_vblank_count(dev, i),
|
|
|
|
|
msecs_to_jiffies(50));
|
|
|
|
|
|
|
|
|
|
drm_crtc_vblank_put(crtc);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_commit - commit validated state object
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @state: the driver state object
|
|
|
|
|
* @async: asynchronous commit
|
|
|
|
|
*
|
|
|
|
|
* This function commits a with drm_atomic_helper_check() pre-validated state
|
|
|
|
|
* object. This can still fail when e.g. the framebuffer reservation fails. For
|
|
|
|
|
* now this doesn't implement asynchronous commits.
|
|
|
|
|
*
|
|
|
|
|
* RETURNS
|
|
|
|
|
* Zero for success or -errno.
|
|
|
|
|
*/
|
|
|
|
|
int drm_atomic_helper_commit(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *state,
|
|
|
|
|
bool async)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (async)
|
|
|
|
|
return -EBUSY;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_helper_prepare_planes(dev, state);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This is the point of no return - everything below never fails except
|
|
|
|
|
* when the hw goes bonghits. Which means we can commit the new state on
|
|
|
|
|
* the software side now.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
drm_atomic_helper_swap_state(dev, state);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Everything below can be run asynchronously without the need to grab
|
|
|
|
|
* any modeset locks at all under one conditions: It must be guaranteed
|
|
|
|
|
* that the asynchronous work has either been cancelled (if the driver
|
|
|
|
|
* supports it, which at least requires that the framebuffers get
|
|
|
|
|
* cleaned up with drm_atomic_helper_cleanup_planes()) or completed
|
|
|
|
|
* before the new state gets committed on the software side with
|
|
|
|
|
* drm_atomic_helper_swap_state().
|
|
|
|
|
*
|
|
|
|
|
* This scheme allows new atomic state updates to be prepared and
|
|
|
|
|
* checked in parallel to the asynchronous completion of the previous
|
|
|
|
|
* update. Which is important since compositors need to figure out the
|
|
|
|
|
* composition of the next frame right after having submitted the
|
|
|
|
|
* current layout.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
drm_atomic_helper_commit_pre_planes(dev, state);
|
|
|
|
|
|
|
|
|
|
drm_atomic_helper_commit_planes(dev, state);
|
|
|
|
|
|
|
|
|
|
drm_atomic_helper_commit_post_planes(dev, state);
|
|
|
|
|
|
|
|
|
|
wait_for_vblanks(dev, state);
|
|
|
|
|
|
|
|
|
|
drm_atomic_helper_cleanup_planes(dev, state);
|
|
|
|
|
|
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit);
|
|
|
|
|
|
2014-11-04 16:14:14 -07:00
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_prepare_planes - prepare plane resources after commit
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @state: atomic state object with old state structures
|
|
|
|
|
*
|
|
|
|
|
* This function prepares plane state, specifically framebuffers, for the new
|
|
|
|
|
* configuration. If any failure is encountered this function will call
|
|
|
|
|
* ->cleanup_fb on any already successfully prepared framebuffer.
|
|
|
|
|
*
|
|
|
|
|
* Returns:
|
|
|
|
|
* 0 on success, negative error code on failure.
|
|
|
|
|
*/
|
|
|
|
|
int drm_atomic_helper_prepare_planes(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *state)
|
|
|
|
|
{
|
|
|
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
|
|
|
int ret, i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
|
|
|
struct drm_plane_helper_funcs *funcs;
|
|
|
|
|
struct drm_plane *plane = state->planes[i];
|
|
|
|
|
struct drm_framebuffer *fb;
|
|
|
|
|
|
|
|
|
|
if (!plane)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
|
|
|
|
|
|
fb = state->plane_states[i]->fb;
|
|
|
|
|
|
|
|
|
|
if (fb && funcs->prepare_fb) {
|
|
|
|
|
ret = funcs->prepare_fb(plane, fb);
|
|
|
|
|
if (ret)
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
fail:
|
|
|
|
|
for (i--; i >= 0; i--) {
|
|
|
|
|
struct drm_plane_helper_funcs *funcs;
|
|
|
|
|
struct drm_plane *plane = state->planes[i];
|
|
|
|
|
struct drm_framebuffer *fb;
|
|
|
|
|
|
|
|
|
|
if (!plane)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
|
|
|
|
|
|
fb = state->plane_states[i]->fb;
|
|
|
|
|
|
|
|
|
|
if (fb && funcs->cleanup_fb)
|
|
|
|
|
funcs->cleanup_fb(plane, fb);
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_prepare_planes);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_commit_planes - commit plane state
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @state: atomic state
|
|
|
|
|
*
|
|
|
|
|
* This function commits the new plane state using the plane and atomic helper
|
|
|
|
|
* functions for planes and crtcs. It assumes that the atomic state has already
|
|
|
|
|
* been pushed into the relevant object state pointers, since this step can no
|
|
|
|
|
* longer fail.
|
|
|
|
|
*
|
|
|
|
|
* It still requires the global state object @state to know which planes and
|
|
|
|
|
* crtcs need to be updated though.
|
|
|
|
|
*/
|
|
|
|
|
void drm_atomic_helper_commit_planes(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *state)
|
|
|
|
|
{
|
|
|
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
|
|
|
int ncrtcs = dev->mode_config.num_crtc;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
|
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
|
|
|
|
|
|
if (!funcs || !funcs->atomic_begin)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs->atomic_begin(crtc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
|
|
|
struct drm_plane_helper_funcs *funcs;
|
|
|
|
|
struct drm_plane *plane = state->planes[i];
|
|
|
|
|
|
|
|
|
|
if (!plane)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
|
|
|
|
|
|
if (!funcs || !funcs->atomic_update)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs->atomic_update(plane);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc_helper_funcs *funcs;
|
|
|
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = crtc->helper_private;
|
|
|
|
|
|
|
|
|
|
if (!funcs || !funcs->atomic_flush)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs->atomic_flush(crtc);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @old_state: atomic state object with old state structures
|
|
|
|
|
*
|
|
|
|
|
* This function cleans up plane state, specifically framebuffers, from the old
|
|
|
|
|
* configuration. Hence the old configuration must be perserved in @old_state to
|
|
|
|
|
* be able to call this function.
|
|
|
|
|
*
|
|
|
|
|
* This function must also be called on the new state when the atomic update
|
|
|
|
|
* fails at any point after calling drm_atomic_helper_prepare_planes().
|
|
|
|
|
*/
|
|
|
|
|
void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *old_state)
|
|
|
|
|
{
|
|
|
|
|
int nplanes = dev->mode_config.num_total_plane;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nplanes; i++) {
|
|
|
|
|
struct drm_plane_helper_funcs *funcs;
|
|
|
|
|
struct drm_plane *plane = old_state->planes[i];
|
|
|
|
|
struct drm_framebuffer *old_fb;
|
|
|
|
|
|
|
|
|
|
if (!plane)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
funcs = plane->helper_private;
|
|
|
|
|
|
|
|
|
|
old_fb = old_state->plane_states[i]->fb;
|
|
|
|
|
|
|
|
|
|
if (old_fb && funcs->cleanup_fb)
|
|
|
|
|
funcs->cleanup_fb(plane, old_fb);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_swap_state - store atomic state into current sw state
|
|
|
|
|
* @dev: DRM device
|
|
|
|
|
* @state: atomic state
|
|
|
|
|
*
|
|
|
|
|
* This function stores the atomic state into the current state pointers in all
|
|
|
|
|
* driver objects. It should be called after all failing steps have been done
|
|
|
|
|
* and succeeded, but before the actual hardware state is committed.
|
|
|
|
|
*
|
|
|
|
|
* For cleanup and error recovery the current state for all changed objects will
|
|
|
|
|
* be swaped into @state.
|
|
|
|
|
*
|
|
|
|
|
* With that sequence it fits perfectly into the plane prepare/cleanup sequence:
|
|
|
|
|
*
|
|
|
|
|
* 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
|
|
|
|
|
*
|
|
|
|
|
* 2. Do any other steps that might fail.
|
|
|
|
|
*
|
|
|
|
|
* 3. Put the staged state into the current state pointers with this function.
|
|
|
|
|
*
|
|
|
|
|
* 4. Actually commit the hardware state.
|
|
|
|
|
*
|
|
|
|
|
* 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3
|
|
|
|
|
* contains the old state. Also do any other cleanup required with that state.
|
|
|
|
|
*/
|
|
|
|
|
void drm_atomic_helper_swap_state(struct drm_device *dev,
|
|
|
|
|
struct drm_atomic_state *state)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < dev->mode_config.num_connector; i++) {
|
|
|
|
|
struct drm_connector *connector = state->connectors[i];
|
|
|
|
|
|
|
|
|
|
if (!connector)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
connector->state->state = state;
|
|
|
|
|
swap(state->connector_states[i], connector->state);
|
|
|
|
|
connector->state->state = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < dev->mode_config.num_crtc; i++) {
|
|
|
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
crtc->state->state = state;
|
|
|
|
|
swap(state->crtc_states[i], crtc->state);
|
|
|
|
|
crtc->state->state = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < dev->mode_config.num_total_plane; i++) {
|
|
|
|
|
struct drm_plane *plane = state->planes[i];
|
|
|
|
|
|
|
|
|
|
if (!plane)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
plane->state->state = state;
|
|
|
|
|
swap(state->plane_states[i], plane->state);
|
|
|
|
|
plane->state->state = NULL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_swap_state);
|
2014-07-27 05:46:52 -06:00
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_update_plane - Helper for primary plane update using atomic
|
|
|
|
|
* @plane: plane object to update
|
|
|
|
|
* @crtc: owning CRTC of owning plane
|
|
|
|
|
* @fb: framebuffer to flip onto plane
|
|
|
|
|
* @crtc_x: x offset of primary plane on crtc
|
|
|
|
|
* @crtc_y: y offset of primary plane on crtc
|
|
|
|
|
* @crtc_w: width of primary plane rectangle on crtc
|
|
|
|
|
* @crtc_h: height of primary plane rectangle on crtc
|
|
|
|
|
* @src_x: x offset of @fb for panning
|
|
|
|
|
* @src_y: y offset of @fb for panning
|
|
|
|
|
* @src_w: width of source rectangle in @fb
|
|
|
|
|
* @src_h: height of source rectangle in @fb
|
|
|
|
|
*
|
|
|
|
|
* Provides a default plane update handler using the atomic driver interface.
|
|
|
|
|
*
|
|
|
|
|
* RETURNS:
|
|
|
|
|
* Zero on success, error code on failure
|
|
|
|
|
*/
|
|
|
|
|
int drm_atomic_helper_update_plane(struct drm_plane *plane,
|
|
|
|
|
struct drm_crtc *crtc,
|
|
|
|
|
struct drm_framebuffer *fb,
|
|
|
|
|
int crtc_x, int crtc_y,
|
|
|
|
|
unsigned int crtc_w, unsigned int crtc_h,
|
|
|
|
|
uint32_t src_x, uint32_t src_y,
|
|
|
|
|
uint32_t src_w, uint32_t src_h)
|
|
|
|
|
{
|
|
|
|
|
struct drm_atomic_state *state;
|
|
|
|
|
struct drm_plane_state *plane_state;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
state = drm_atomic_state_alloc(plane->dev);
|
|
|
|
|
if (!state)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
|
|
|
retry:
|
|
|
|
|
plane_state = drm_atomic_get_plane_state(state, plane);
|
|
|
|
|
if (IS_ERR(plane_state)) {
|
|
|
|
|
ret = PTR_ERR(plane_state);
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
plane_state->fb = fb;
|
|
|
|
|
plane_state->crtc_x = crtc_x;
|
|
|
|
|
plane_state->crtc_y = crtc_y;
|
|
|
|
|
plane_state->crtc_h = crtc_h;
|
|
|
|
|
plane_state->crtc_w = crtc_w;
|
|
|
|
|
plane_state->src_x = src_x;
|
|
|
|
|
plane_state->src_y = src_y;
|
|
|
|
|
plane_state->src_h = src_h;
|
|
|
|
|
plane_state->src_w = src_w;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_commit(state);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
|
|
|
return 0;
|
|
|
|
|
fail:
|
|
|
|
|
if (ret == -EDEADLK)
|
|
|
|
|
goto backoff;
|
|
|
|
|
|
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
backoff:
|
|
|
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
|
drm_atomic_state_clear(state);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Someone might have exchanged the framebuffer while we dropped locks
|
|
|
|
|
* in the backoff code. We need to fix up the fb refcount tracking the
|
|
|
|
|
* core does for us.
|
|
|
|
|
*/
|
|
|
|
|
plane->old_fb = plane->fb;
|
|
|
|
|
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_update_plane);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
|
|
|
|
|
* @plane: plane to disable
|
|
|
|
|
*
|
|
|
|
|
* Provides a default plane disable handler using the atomic driver interface.
|
|
|
|
|
*
|
|
|
|
|
* RETURNS:
|
|
|
|
|
* Zero on success, error code on failure
|
|
|
|
|
*/
|
|
|
|
|
int drm_atomic_helper_disable_plane(struct drm_plane *plane)
|
|
|
|
|
{
|
|
|
|
|
struct drm_atomic_state *state;
|
|
|
|
|
struct drm_plane_state *plane_state;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
state = drm_atomic_state_alloc(plane->dev);
|
|
|
|
|
if (!state)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc);
|
|
|
|
|
retry:
|
|
|
|
|
plane_state = drm_atomic_get_plane_state(state, plane);
|
|
|
|
|
if (IS_ERR(plane_state)) {
|
|
|
|
|
ret = PTR_ERR(plane_state);
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
plane_state->fb = NULL;
|
|
|
|
|
plane_state->crtc_x = 0;
|
|
|
|
|
plane_state->crtc_y = 0;
|
|
|
|
|
plane_state->crtc_h = 0;
|
|
|
|
|
plane_state->crtc_w = 0;
|
|
|
|
|
plane_state->src_x = 0;
|
|
|
|
|
plane_state->src_y = 0;
|
|
|
|
|
plane_state->src_h = 0;
|
|
|
|
|
plane_state->src_w = 0;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_commit(state);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
|
|
|
return 0;
|
|
|
|
|
fail:
|
|
|
|
|
if (ret == -EDEADLK)
|
|
|
|
|
goto backoff;
|
|
|
|
|
|
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
backoff:
|
|
|
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
|
drm_atomic_state_clear(state);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Someone might have exchanged the framebuffer while we dropped locks
|
|
|
|
|
* in the backoff code. We need to fix up the fb refcount tracking the
|
|
|
|
|
* core does for us.
|
|
|
|
|
*/
|
|
|
|
|
plane->old_fb = plane->fb;
|
|
|
|
|
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_disable_plane);
|
|
|
|
|
|
|
|
|
|
static int update_output_state(struct drm_atomic_state *state,
|
|
|
|
|
struct drm_mode_set *set)
|
|
|
|
|
{
|
|
|
|
|
struct drm_device *dev = set->crtc->dev;
|
|
|
|
|
struct drm_connector_state *conn_state;
|
|
|
|
|
int nconnectors = state->dev->mode_config.num_connector;
|
|
|
|
|
int ncrtcs = state->dev->mode_config.num_crtc;
|
|
|
|
|
int ret, i, j;
|
|
|
|
|
|
|
|
|
|
ret = drm_modeset_lock(&dev->mode_config.connection_mutex,
|
|
|
|
|
state->acquire_ctx);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
/* First grab all affected connector/crtc states. */
|
|
|
|
|
for (i = 0; i < set->num_connectors; i++) {
|
|
|
|
|
conn_state = drm_atomic_get_connector_state(state,
|
|
|
|
|
set->connectors[i]);
|
|
|
|
|
if (IS_ERR(conn_state))
|
|
|
|
|
return PTR_ERR(conn_state);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_add_affected_connectors(state, crtc);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Then recompute connector->crtc links and crtc enabling state. */
|
|
|
|
|
for (i = 0; i < nconnectors; i++) {
|
|
|
|
|
struct drm_connector *connector;
|
|
|
|
|
|
|
|
|
|
connector = state->connectors[i];
|
|
|
|
|
conn_state = state->connector_states[i];
|
|
|
|
|
|
|
|
|
|
if (!connector)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (conn_state->crtc == set->crtc) {
|
|
|
|
|
ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
|
|
|
NULL);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (j = 0; j < set->num_connectors; j++) {
|
|
|
|
|
if (set->connectors[j] == connector) {
|
|
|
|
|
ret = drm_atomic_set_crtc_for_connector(conn_state,
|
|
|
|
|
set->crtc);
|
|
|
|
|
if (ret)
|
|
|
|
|
return ret;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ncrtcs; i++) {
|
|
|
|
|
struct drm_crtc *crtc = state->crtcs[i];
|
|
|
|
|
struct drm_crtc_state *crtc_state = state->crtc_states[i];
|
|
|
|
|
|
|
|
|
|
if (!crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* Don't update ->enable for the CRTC in the set_config request,
|
|
|
|
|
* since a mismatch would indicate a bug in the upper layers.
|
|
|
|
|
* The actual modeset code later on will catch any
|
|
|
|
|
* inconsistencies here. */
|
|
|
|
|
if (crtc == set->crtc)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
crtc_state->enable =
|
|
|
|
|
drm_atomic_connectors_for_crtc(state, crtc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_set_config - set a new config from userspace
|
|
|
|
|
* @set: mode set configuration
|
|
|
|
|
*
|
|
|
|
|
* Provides a default crtc set_config handler using the atomic driver interface.
|
|
|
|
|
*
|
|
|
|
|
* Returns:
|
|
|
|
|
* Returns 0 on success, negative errno numbers on failure.
|
|
|
|
|
*/
|
|
|
|
|
int drm_atomic_helper_set_config(struct drm_mode_set *set)
|
|
|
|
|
{
|
|
|
|
|
struct drm_atomic_state *state;
|
|
|
|
|
struct drm_crtc *crtc = set->crtc;
|
|
|
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
|
struct drm_plane_state *primary_state;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
state = drm_atomic_state_alloc(crtc->dev);
|
|
|
|
|
if (!state)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
|
|
|
|
|
retry:
|
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
|
|
|
if (IS_ERR(crtc_state)) {
|
|
|
|
|
ret = PTR_ERR(crtc_state);
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!set->mode) {
|
|
|
|
|
WARN_ON(set->fb);
|
|
|
|
|
WARN_ON(set->num_connectors);
|
|
|
|
|
|
|
|
|
|
crtc_state->enable = false;
|
|
|
|
|
goto commit;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
WARN_ON(!set->fb);
|
|
|
|
|
WARN_ON(!set->num_connectors);
|
|
|
|
|
|
|
|
|
|
crtc_state->enable = true;
|
|
|
|
|
drm_mode_copy(&crtc_state->mode, set->mode);
|
|
|
|
|
|
|
|
|
|
primary_state = drm_atomic_get_plane_state(state, crtc->primary);
|
|
|
|
|
if (IS_ERR(primary_state)) {
|
|
|
|
|
ret = PTR_ERR(primary_state);
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_set_crtc_for_plane(primary_state, crtc);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
primary_state->fb = set->fb;
|
|
|
|
|
primary_state->crtc_x = 0;
|
|
|
|
|
primary_state->crtc_y = 0;
|
|
|
|
|
primary_state->crtc_h = set->mode->vdisplay;
|
|
|
|
|
primary_state->crtc_w = set->mode->hdisplay;
|
|
|
|
|
primary_state->src_x = set->x << 16;
|
|
|
|
|
primary_state->src_y = set->y << 16;
|
|
|
|
|
primary_state->src_h = set->mode->vdisplay << 16;
|
|
|
|
|
primary_state->src_w = set->mode->hdisplay << 16;
|
|
|
|
|
|
|
|
|
|
commit:
|
|
|
|
|
ret = update_output_state(state, set);
|
|
|
|
|
if (ret)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_commit(state);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
|
|
|
return 0;
|
|
|
|
|
fail:
|
|
|
|
|
if (ret == -EDEADLK)
|
|
|
|
|
goto backoff;
|
|
|
|
|
|
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
backoff:
|
|
|
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
|
drm_atomic_state_clear(state);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Someone might have exchanged the framebuffer while we dropped locks
|
|
|
|
|
* in the backoff code. We need to fix up the fb refcount tracking the
|
|
|
|
|
* core does for us.
|
|
|
|
|
*/
|
|
|
|
|
crtc->primary->old_fb = crtc->primary->fb;
|
|
|
|
|
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_set_config);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_crtc_set_property - helper for crtc prorties
|
|
|
|
|
* @crtc: DRM crtc
|
|
|
|
|
* @property: DRM property
|
|
|
|
|
* @val: value of property
|
|
|
|
|
*
|
|
|
|
|
* Provides a default plane disablle handler using the atomic driver interface.
|
|
|
|
|
*
|
|
|
|
|
* RETURNS:
|
|
|
|
|
* Zero on success, error code on failure
|
|
|
|
|
*/
|
|
|
|
|
int
|
|
|
|
|
drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
|
|
|
|
|
struct drm_property *property,
|
|
|
|
|
uint64_t val)
|
|
|
|
|
{
|
|
|
|
|
struct drm_atomic_state *state;
|
|
|
|
|
struct drm_crtc_state *crtc_state;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
state = drm_atomic_state_alloc(crtc->dev);
|
|
|
|
|
if (!state)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
/* ->set_property is always called with all locks held. */
|
|
|
|
|
state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
|
|
|
|
|
retry:
|
|
|
|
|
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
|
|
|
|
if (IS_ERR(crtc_state)) {
|
|
|
|
|
ret = PTR_ERR(crtc_state);
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = crtc->funcs->atomic_set_property(crtc, crtc_state,
|
|
|
|
|
property, val);
|
|
|
|
|
if (ret)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_commit(state);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
|
|
|
return 0;
|
|
|
|
|
fail:
|
|
|
|
|
if (ret == -EDEADLK)
|
|
|
|
|
goto backoff;
|
|
|
|
|
|
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
backoff:
|
|
|
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
|
drm_atomic_state_clear(state);
|
|
|
|
|
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_plane_set_property - helper for plane prorties
|
|
|
|
|
* @plane: DRM plane
|
|
|
|
|
* @property: DRM property
|
|
|
|
|
* @val: value of property
|
|
|
|
|
*
|
|
|
|
|
* Provides a default plane disable handler using the atomic driver interface.
|
|
|
|
|
*
|
|
|
|
|
* RETURNS:
|
|
|
|
|
* Zero on success, error code on failure
|
|
|
|
|
*/
|
|
|
|
|
int
|
|
|
|
|
drm_atomic_helper_plane_set_property(struct drm_plane *plane,
|
|
|
|
|
struct drm_property *property,
|
|
|
|
|
uint64_t val)
|
|
|
|
|
{
|
|
|
|
|
struct drm_atomic_state *state;
|
|
|
|
|
struct drm_plane_state *plane_state;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
state = drm_atomic_state_alloc(plane->dev);
|
|
|
|
|
if (!state)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
/* ->set_property is always called with all locks held. */
|
|
|
|
|
state->acquire_ctx = plane->dev->mode_config.acquire_ctx;
|
|
|
|
|
retry:
|
|
|
|
|
plane_state = drm_atomic_get_plane_state(state, plane);
|
|
|
|
|
if (IS_ERR(plane_state)) {
|
|
|
|
|
ret = PTR_ERR(plane_state);
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = plane->funcs->atomic_set_property(plane, plane_state,
|
|
|
|
|
property, val);
|
|
|
|
|
if (ret)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_commit(state);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
|
|
|
return 0;
|
|
|
|
|
fail:
|
|
|
|
|
if (ret == -EDEADLK)
|
|
|
|
|
goto backoff;
|
|
|
|
|
|
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
backoff:
|
|
|
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
|
drm_atomic_state_clear(state);
|
|
|
|
|
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_plane_set_property);
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* drm_atomic_helper_connector_set_property - helper for connector prorties
|
|
|
|
|
* @connector: DRM connector
|
|
|
|
|
* @property: DRM property
|
|
|
|
|
* @val: value of property
|
|
|
|
|
*
|
|
|
|
|
* Provides a default plane disablle handler using the atomic driver interface.
|
|
|
|
|
*
|
|
|
|
|
* RETURNS:
|
|
|
|
|
* Zero on success, error code on failure
|
|
|
|
|
*/
|
|
|
|
|
int
|
|
|
|
|
drm_atomic_helper_connector_set_property(struct drm_connector *connector,
|
|
|
|
|
struct drm_property *property,
|
|
|
|
|
uint64_t val)
|
|
|
|
|
{
|
|
|
|
|
struct drm_atomic_state *state;
|
|
|
|
|
struct drm_connector_state *connector_state;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
state = drm_atomic_state_alloc(connector->dev);
|
|
|
|
|
if (!state)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
|
|
/* ->set_property is always called with all locks held. */
|
|
|
|
|
state->acquire_ctx = connector->dev->mode_config.acquire_ctx;
|
|
|
|
|
retry:
|
|
|
|
|
connector_state = drm_atomic_get_connector_state(state, connector);
|
|
|
|
|
if (IS_ERR(connector_state)) {
|
|
|
|
|
ret = PTR_ERR(connector_state);
|
|
|
|
|
goto fail;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = connector->funcs->atomic_set_property(connector, connector_state,
|
|
|
|
|
property, val);
|
|
|
|
|
if (ret)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
ret = drm_atomic_commit(state);
|
|
|
|
|
if (ret != 0)
|
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
|
|
/* Driver takes ownership of state on successful commit. */
|
|
|
|
|
return 0;
|
|
|
|
|
fail:
|
|
|
|
|
if (ret == -EDEADLK)
|
|
|
|
|
goto backoff;
|
|
|
|
|
|
|
|
|
|
drm_atomic_state_free(state);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
backoff:
|
|
|
|
|
drm_atomic_legacy_backoff(state);
|
|
|
|
|
drm_atomic_state_clear(state);
|
|
|
|
|
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL(drm_atomic_helper_connector_set_property);
|