![Keith Packard](/assets/img/avatar_default.png)
Making the drm_crtc.c code recognize the DPMS property and invoke the connector->dpms function doesn't remove any capability from the driver while reducing code duplication. That just highlighted the problem with the existing DPMS functions which could turn off the connector, but failed to turn off any relevant crtcs. The new drm_helper_connector_dpms function manages all of that, using the drm_helper-specific crtc and encoder dpms functions, automatically computing the appropriate DPMS level for each object in the system. This fixes the current troubles in the i915 driver which left PLLs, pipes and planes running while in DPMS_OFF mode or even while they were unused. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
1096 lines
28 KiB
C
1096 lines
28 KiB
C
/*
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* Copyright (c) 2006-2008 Intel Corporation
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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*
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* DRM core CRTC related functions
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*
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* Authors:
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* Keith Packard
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* Eric Anholt <eric@anholt.net>
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* Dave Airlie <airlied@linux.ie>
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* Jesse Barnes <jesse.barnes@intel.com>
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*/
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#include "drmP.h"
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#include "drm_crtc.h"
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#include "drm_crtc_helper.h"
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/*
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* Detailed mode info for 800x600@60Hz
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*/
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static struct drm_display_mode std_modes[] = {
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{ DRM_MODE("800x600", DRM_MODE_TYPE_DEFAULT, 40000, 800, 840,
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968, 1056, 0, 600, 601, 605, 628, 0,
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DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
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};
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static void drm_mode_validate_flag(struct drm_connector *connector,
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int flags)
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{
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struct drm_display_mode *mode, *t;
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if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
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return;
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
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!(flags & DRM_MODE_FLAG_INTERLACE))
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mode->status = MODE_NO_INTERLACE;
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if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
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!(flags & DRM_MODE_FLAG_DBLSCAN))
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mode->status = MODE_NO_DBLESCAN;
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}
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return;
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}
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/**
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* drm_helper_probe_connector_modes - get complete set of display modes
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* @dev: DRM device
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* @maxX: max width for modes
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* @maxY: max height for modes
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*
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* LOCKING:
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* Caller must hold mode config lock.
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*
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* Based on @dev's mode_config layout, scan all the connectors and try to detect
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* modes on them. Modes will first be added to the connector's probed_modes
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* list, then culled (based on validity and the @maxX, @maxY parameters) and
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* put into the normal modes list.
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*
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* Intended to be used either at bootup time or when major configuration
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* changes have occurred.
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*
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* FIXME: take into account monitor limits
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*
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* RETURNS:
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* Number of modes found on @connector.
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*/
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int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
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uint32_t maxX, uint32_t maxY)
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{
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struct drm_device *dev = connector->dev;
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struct drm_display_mode *mode, *t;
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struct drm_connector_helper_funcs *connector_funcs =
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connector->helper_private;
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int count = 0;
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int mode_flags = 0;
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DRM_DEBUG("%s\n", drm_get_connector_name(connector));
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/* set all modes to the unverified state */
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list_for_each_entry_safe(mode, t, &connector->modes, head)
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mode->status = MODE_UNVERIFIED;
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connector->status = connector->funcs->detect(connector);
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if (connector->status == connector_status_disconnected) {
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DRM_DEBUG("%s is disconnected\n",
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drm_get_connector_name(connector));
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/* TODO set EDID to NULL */
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return 0;
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}
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count = (*connector_funcs->get_modes)(connector);
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if (!count)
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return 0;
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drm_mode_connector_list_update(connector);
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if (maxX && maxY)
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drm_mode_validate_size(dev, &connector->modes, maxX,
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maxY, 0);
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if (connector->interlace_allowed)
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mode_flags |= DRM_MODE_FLAG_INTERLACE;
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if (connector->doublescan_allowed)
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mode_flags |= DRM_MODE_FLAG_DBLSCAN;
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drm_mode_validate_flag(connector, mode_flags);
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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if (mode->status == MODE_OK)
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mode->status = connector_funcs->mode_valid(connector,
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mode);
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}
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drm_mode_prune_invalid(dev, &connector->modes, true);
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if (list_empty(&connector->modes))
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return 0;
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drm_mode_sort(&connector->modes);
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DRM_DEBUG("Probed modes for %s\n", drm_get_connector_name(connector));
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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mode->vrefresh = drm_mode_vrefresh(mode);
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drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
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drm_mode_debug_printmodeline(mode);
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}
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return count;
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}
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EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
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int drm_helper_probe_connector_modes(struct drm_device *dev, uint32_t maxX,
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uint32_t maxY)
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{
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struct drm_connector *connector;
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int count = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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count += drm_helper_probe_single_connector_modes(connector,
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maxX, maxY);
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}
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return count;
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}
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EXPORT_SYMBOL(drm_helper_probe_connector_modes);
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static void drm_helper_add_std_modes(struct drm_device *dev,
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struct drm_connector *connector)
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{
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struct drm_display_mode *mode, *t;
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int i;
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for (i = 0; i < ARRAY_SIZE(std_modes); i++) {
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struct drm_display_mode *stdmode;
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/*
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* When no valid EDID modes are available we end up
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* here and bailed in the past, now we add some standard
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* modes and move on.
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*/
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stdmode = drm_mode_duplicate(dev, &std_modes[i]);
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drm_mode_probed_add(connector, stdmode);
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drm_mode_list_concat(&connector->probed_modes,
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&connector->modes);
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DRM_DEBUG("Adding mode %s to %s\n", stdmode->name,
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drm_get_connector_name(connector));
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}
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drm_mode_sort(&connector->modes);
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DRM_DEBUG("Added std modes on %s\n", drm_get_connector_name(connector));
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list_for_each_entry_safe(mode, t, &connector->modes, head) {
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mode->vrefresh = drm_mode_vrefresh(mode);
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drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
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drm_mode_debug_printmodeline(mode);
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}
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}
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/**
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* drm_helper_encoder_in_use - check if a given encoder is in use
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* @encoder: encoder to check
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*
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* LOCKING:
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* Caller must hold mode config lock.
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*
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* Walk @encoders's DRM device's mode_config and see if it's in use.
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*
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* RETURNS:
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* True if @encoder is part of the mode_config, false otherwise.
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*/
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bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
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{
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struct drm_connector *connector;
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struct drm_device *dev = encoder->dev;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head)
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if (connector->encoder == encoder)
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return true;
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return false;
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}
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EXPORT_SYMBOL(drm_helper_encoder_in_use);
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/**
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* drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
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* @crtc: CRTC to check
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*
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* LOCKING:
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* Caller must hold mode config lock.
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*
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* Walk @crtc's DRM device's mode_config and see if it's in use.
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*
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* RETURNS:
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* True if @crtc is part of the mode_config, false otherwise.
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*/
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bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
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{
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struct drm_encoder *encoder;
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struct drm_device *dev = crtc->dev;
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/* FIXME: Locking around list access? */
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head)
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if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
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return true;
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return false;
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}
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EXPORT_SYMBOL(drm_helper_crtc_in_use);
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/**
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* drm_disable_unused_functions - disable unused objects
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* @dev: DRM device
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*
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* LOCKING:
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* Caller must hold mode config lock.
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*
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* If an connector or CRTC isn't part of @dev's mode_config, it can be disabled
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* by calling its dpms function, which should power it off.
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*/
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void drm_helper_disable_unused_functions(struct drm_device *dev)
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{
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struct drm_encoder *encoder;
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struct drm_encoder_helper_funcs *encoder_funcs;
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struct drm_crtc *crtc;
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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encoder_funcs = encoder->helper_private;
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if (!drm_helper_encoder_in_use(encoder))
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(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
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}
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
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crtc->enabled = drm_helper_crtc_in_use(crtc);
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if (!crtc->enabled) {
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crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
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crtc->fb = NULL;
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}
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}
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}
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EXPORT_SYMBOL(drm_helper_disable_unused_functions);
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static struct drm_display_mode *drm_has_preferred_mode(struct drm_connector *connector, int width, int height)
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{
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struct drm_display_mode *mode;
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list_for_each_entry(mode, &connector->modes, head) {
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if (drm_mode_width(mode) > width ||
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drm_mode_height(mode) > height)
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continue;
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if (mode->type & DRM_MODE_TYPE_PREFERRED)
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return mode;
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}
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return NULL;
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}
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static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
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{
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bool enable;
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if (strict) {
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enable = connector->status == connector_status_connected;
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} else {
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enable = connector->status != connector_status_disconnected;
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}
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return enable;
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}
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static void drm_enable_connectors(struct drm_device *dev, bool *enabled)
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{
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bool any_enabled = false;
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struct drm_connector *connector;
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int i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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enabled[i] = drm_connector_enabled(connector, true);
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DRM_DEBUG("connector %d enabled? %s\n", connector->base.id,
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enabled[i] ? "yes" : "no");
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any_enabled |= enabled[i];
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i++;
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}
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if (any_enabled)
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return;
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i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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enabled[i] = drm_connector_enabled(connector, false);
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i++;
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}
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}
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static bool drm_target_preferred(struct drm_device *dev,
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struct drm_display_mode **modes,
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bool *enabled, int width, int height)
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{
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struct drm_connector *connector;
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int i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (enabled[i] == false) {
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i++;
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continue;
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}
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DRM_DEBUG("looking for preferred mode on connector %d\n",
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connector->base.id);
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modes[i] = drm_has_preferred_mode(connector, width, height);
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/* No preferred modes, pick one off the list */
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if (!modes[i] && !list_empty(&connector->modes)) {
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list_for_each_entry(modes[i], &connector->modes, head)
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break;
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}
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DRM_DEBUG("found mode %s\n", modes[i] ? modes[i]->name :
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"none");
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i++;
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}
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return true;
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}
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static int drm_pick_crtcs(struct drm_device *dev,
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struct drm_crtc **best_crtcs,
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struct drm_display_mode **modes,
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int n, int width, int height)
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{
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int c, o;
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struct drm_connector *connector;
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struct drm_connector_helper_funcs *connector_funcs;
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struct drm_encoder *encoder;
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struct drm_crtc *best_crtc;
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int my_score, best_score, score;
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struct drm_crtc **crtcs, *crtc;
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if (n == dev->mode_config.num_connector)
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return 0;
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c = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (c == n)
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break;
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c++;
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}
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best_crtcs[n] = NULL;
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best_crtc = NULL;
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best_score = drm_pick_crtcs(dev, best_crtcs, modes, n+1, width, height);
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if (modes[n] == NULL)
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return best_score;
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crtcs = kmalloc(dev->mode_config.num_connector *
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sizeof(struct drm_crtc *), GFP_KERNEL);
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if (!crtcs)
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return best_score;
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my_score = 1;
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if (connector->status == connector_status_connected)
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my_score++;
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if (drm_has_preferred_mode(connector, width, height))
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my_score++;
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connector_funcs = connector->helper_private;
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encoder = connector_funcs->best_encoder(connector);
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if (!encoder)
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goto out;
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connector->encoder = encoder;
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/* select a crtc for this connector and then attempt to configure
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remaining connectors */
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c = 0;
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list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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if ((connector->encoder->possible_crtcs & (1 << c)) == 0) {
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c++;
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continue;
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}
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for (o = 0; o < n; o++)
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if (best_crtcs[o] == crtc)
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break;
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if (o < n) {
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/* ignore cloning for now */
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c++;
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continue;
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}
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crtcs[n] = crtc;
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memcpy(crtcs, best_crtcs, n * sizeof(struct drm_crtc *));
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score = my_score + drm_pick_crtcs(dev, crtcs, modes, n + 1,
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width, height);
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if (score > best_score) {
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best_crtc = crtc;
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best_score = score;
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memcpy(best_crtcs, crtcs,
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dev->mode_config.num_connector *
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sizeof(struct drm_crtc *));
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}
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c++;
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}
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out:
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kfree(crtcs);
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return best_score;
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}
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static void drm_setup_crtcs(struct drm_device *dev)
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{
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struct drm_crtc **crtcs;
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struct drm_display_mode **modes;
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struct drm_encoder *encoder;
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struct drm_connector *connector;
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bool *enabled;
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int width, height;
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int i, ret;
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DRM_DEBUG("\n");
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width = dev->mode_config.max_width;
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height = dev->mode_config.max_height;
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/* clean out all the encoder/crtc combos */
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list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
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encoder->crtc = NULL;
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}
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crtcs = kcalloc(dev->mode_config.num_connector,
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sizeof(struct drm_crtc *), GFP_KERNEL);
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modes = kcalloc(dev->mode_config.num_connector,
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sizeof(struct drm_display_mode *), GFP_KERNEL);
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enabled = kcalloc(dev->mode_config.num_connector,
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sizeof(bool), GFP_KERNEL);
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drm_enable_connectors(dev, enabled);
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ret = drm_target_preferred(dev, modes, enabled, width, height);
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if (!ret)
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DRM_ERROR("Unable to find initial modes\n");
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DRM_DEBUG("picking CRTCs for %dx%d config\n", width, height);
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drm_pick_crtcs(dev, crtcs, modes, 0, width, height);
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i = 0;
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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struct drm_display_mode *mode = modes[i];
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struct drm_crtc *crtc = crtcs[i];
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if (connector->encoder == NULL) {
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i++;
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continue;
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}
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if (mode && crtc) {
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DRM_DEBUG("desired mode %s set on crtc %d\n",
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mode->name, crtc->base.id);
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crtc->desired_mode = mode;
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connector->encoder->crtc = crtc;
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} else
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connector->encoder->crtc = NULL;
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i++;
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}
|
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kfree(crtcs);
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kfree(modes);
|
|
kfree(enabled);
|
|
}
|
|
|
|
/**
|
|
* drm_encoder_crtc_ok - can a given crtc drive a given encoder?
|
|
* @encoder: encoder to test
|
|
* @crtc: crtc to test
|
|
*
|
|
* Return false if @encoder can't be driven by @crtc, true otherwise.
|
|
*/
|
|
static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
|
|
struct drm_crtc *crtc)
|
|
{
|
|
struct drm_device *dev;
|
|
struct drm_crtc *tmp;
|
|
int crtc_mask = 1;
|
|
|
|
WARN(!crtc, "checking null crtc?");
|
|
|
|
dev = crtc->dev;
|
|
|
|
list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
|
|
if (tmp == crtc)
|
|
break;
|
|
crtc_mask <<= 1;
|
|
}
|
|
|
|
if (encoder->possible_crtcs & crtc_mask)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Check the CRTC we're going to map each output to vs. its current
|
|
* CRTC. If they don't match, we have to disable the output and the CRTC
|
|
* since the driver will have to re-route things.
|
|
*/
|
|
static void
|
|
drm_crtc_prepare_encoders(struct drm_device *dev)
|
|
{
|
|
struct drm_encoder_helper_funcs *encoder_funcs;
|
|
struct drm_encoder *encoder;
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
encoder_funcs = encoder->helper_private;
|
|
/* Disable unused encoders */
|
|
if (encoder->crtc == NULL)
|
|
(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
|
|
/* Disable encoders whose CRTC is about to change */
|
|
if (encoder_funcs->get_crtc &&
|
|
encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
|
|
(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* drm_crtc_set_mode - set a mode
|
|
* @crtc: CRTC to program
|
|
* @mode: mode to use
|
|
* @x: width of mode
|
|
* @y: height of mode
|
|
*
|
|
* LOCKING:
|
|
* Caller must hold mode config lock.
|
|
*
|
|
* Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
|
|
* to fixup or reject the mode prior to trying to set it.
|
|
*
|
|
* RETURNS:
|
|
* True if the mode was set successfully, or false otherwise.
|
|
*/
|
|
bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
|
|
struct drm_display_mode *mode,
|
|
int x, int y,
|
|
struct drm_framebuffer *old_fb)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
struct drm_display_mode *adjusted_mode, saved_mode;
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
struct drm_encoder_helper_funcs *encoder_funcs;
|
|
int saved_x, saved_y;
|
|
struct drm_encoder *encoder;
|
|
bool ret = true;
|
|
|
|
adjusted_mode = drm_mode_duplicate(dev, mode);
|
|
|
|
crtc->enabled = drm_helper_crtc_in_use(crtc);
|
|
|
|
if (!crtc->enabled)
|
|
return true;
|
|
|
|
saved_mode = crtc->mode;
|
|
saved_x = crtc->x;
|
|
saved_y = crtc->y;
|
|
|
|
/* Update crtc values up front so the driver can rely on them for mode
|
|
* setting.
|
|
*/
|
|
crtc->mode = *mode;
|
|
crtc->x = x;
|
|
crtc->y = y;
|
|
|
|
/* Pass our mode to the connectors and the CRTC to give them a chance to
|
|
* adjust it according to limitations or connector properties, and also
|
|
* a chance to reject the mode entirely.
|
|
*/
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
encoder_funcs = encoder->helper_private;
|
|
if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
|
|
adjusted_mode))) {
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
if (!(ret = crtc_funcs->mode_fixup(crtc, mode, adjusted_mode))) {
|
|
goto done;
|
|
}
|
|
|
|
/* Prepare the encoders and CRTCs before setting the mode. */
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
encoder_funcs = encoder->helper_private;
|
|
/* Disable the encoders as the first thing we do. */
|
|
encoder_funcs->prepare(encoder);
|
|
}
|
|
|
|
drm_crtc_prepare_encoders(dev);
|
|
|
|
crtc_funcs->prepare(crtc);
|
|
|
|
/* Set up the DPLL and any encoders state that needs to adjust or depend
|
|
* on the DPLL.
|
|
*/
|
|
ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
|
|
if (!ret)
|
|
goto done;
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
DRM_INFO("%s: set mode %s %x\n", drm_get_encoder_name(encoder),
|
|
mode->name, mode->base.id);
|
|
encoder_funcs = encoder->helper_private;
|
|
encoder_funcs->mode_set(encoder, mode, adjusted_mode);
|
|
}
|
|
|
|
/* Now enable the clocks, plane, pipe, and connectors that we set up. */
|
|
crtc_funcs->commit(crtc);
|
|
|
|
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
|
|
|
|
if (encoder->crtc != crtc)
|
|
continue;
|
|
|
|
encoder_funcs = encoder->helper_private;
|
|
encoder_funcs->commit(encoder);
|
|
|
|
}
|
|
|
|
/* XXX free adjustedmode */
|
|
drm_mode_destroy(dev, adjusted_mode);
|
|
/* FIXME: add subpixel order */
|
|
done:
|
|
if (!ret) {
|
|
crtc->mode = saved_mode;
|
|
crtc->x = saved_x;
|
|
crtc->y = saved_y;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_crtc_helper_set_mode);
|
|
|
|
|
|
/**
|
|
* drm_crtc_helper_set_config - set a new config from userspace
|
|
* @crtc: CRTC to setup
|
|
* @crtc_info: user provided configuration
|
|
* @new_mode: new mode to set
|
|
* @connector_set: set of connectors for the new config
|
|
* @fb: new framebuffer
|
|
*
|
|
* LOCKING:
|
|
* Caller must hold mode config lock.
|
|
*
|
|
* Setup a new configuration, provided by the user in @crtc_info, and enable
|
|
* it.
|
|
*
|
|
* RETURNS:
|
|
* Zero. (FIXME)
|
|
*/
|
|
int drm_crtc_helper_set_config(struct drm_mode_set *set)
|
|
{
|
|
struct drm_device *dev;
|
|
struct drm_crtc **save_crtcs, *new_crtc;
|
|
struct drm_encoder **save_encoders, *new_encoder;
|
|
struct drm_framebuffer *old_fb = NULL;
|
|
bool save_enabled;
|
|
bool mode_changed = false;
|
|
bool fb_changed = false;
|
|
struct drm_connector *connector;
|
|
int count = 0, ro, fail = 0;
|
|
struct drm_crtc_helper_funcs *crtc_funcs;
|
|
int ret = 0;
|
|
|
|
DRM_DEBUG("\n");
|
|
|
|
if (!set)
|
|
return -EINVAL;
|
|
|
|
if (!set->crtc)
|
|
return -EINVAL;
|
|
|
|
if (!set->crtc->helper_private)
|
|
return -EINVAL;
|
|
|
|
crtc_funcs = set->crtc->helper_private;
|
|
|
|
DRM_DEBUG("crtc: %p %d fb: %p connectors: %p num_connectors: %d (x, y) (%i, %i)\n",
|
|
set->crtc, set->crtc->base.id, set->fb, set->connectors,
|
|
(int)set->num_connectors, set->x, set->y);
|
|
|
|
dev = set->crtc->dev;
|
|
|
|
/* save previous config */
|
|
save_enabled = set->crtc->enabled;
|
|
|
|
/*
|
|
* We do mode_config.num_connectors here since we'll look at the
|
|
* CRTC and encoder associated with each connector later.
|
|
*/
|
|
save_crtcs = kzalloc(dev->mode_config.num_connector *
|
|
sizeof(struct drm_crtc *), GFP_KERNEL);
|
|
if (!save_crtcs)
|
|
return -ENOMEM;
|
|
|
|
save_encoders = kzalloc(dev->mode_config.num_connector *
|
|
sizeof(struct drm_encoders *), GFP_KERNEL);
|
|
if (!save_encoders) {
|
|
kfree(save_crtcs);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* We should be able to check here if the fb has the same properties
|
|
* and then just flip_or_move it */
|
|
if (set->crtc->fb != set->fb) {
|
|
/* If we have no fb then treat it as a full mode set */
|
|
if (set->crtc->fb == NULL) {
|
|
DRM_DEBUG("crtc has no fb, full mode set\n");
|
|
mode_changed = true;
|
|
} else if ((set->fb->bits_per_pixel !=
|
|
set->crtc->fb->bits_per_pixel) ||
|
|
set->fb->depth != set->crtc->fb->depth)
|
|
fb_changed = true;
|
|
else
|
|
fb_changed = true;
|
|
}
|
|
|
|
if (set->x != set->crtc->x || set->y != set->crtc->y)
|
|
fb_changed = true;
|
|
|
|
if (set->mode && !drm_mode_equal(set->mode, &set->crtc->mode)) {
|
|
DRM_DEBUG("modes are different, full mode set\n");
|
|
drm_mode_debug_printmodeline(&set->crtc->mode);
|
|
drm_mode_debug_printmodeline(set->mode);
|
|
mode_changed = true;
|
|
}
|
|
|
|
/* a) traverse passed in connector list and get encoders for them */
|
|
count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
struct drm_connector_helper_funcs *connector_funcs =
|
|
connector->helper_private;
|
|
save_encoders[count++] = connector->encoder;
|
|
new_encoder = connector->encoder;
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
if (set->connectors[ro] == connector) {
|
|
new_encoder = connector_funcs->best_encoder(connector);
|
|
/* if we can't get an encoder for a connector
|
|
we are setting now - then fail */
|
|
if (new_encoder == NULL)
|
|
/* don't break so fail path works correct */
|
|
fail = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (new_encoder != connector->encoder) {
|
|
DRM_DEBUG("encoder changed, full mode switch\n");
|
|
mode_changed = true;
|
|
connector->encoder = new_encoder;
|
|
}
|
|
}
|
|
|
|
if (fail) {
|
|
ret = -EINVAL;
|
|
goto fail_no_encoder;
|
|
}
|
|
|
|
count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
if (!connector->encoder)
|
|
continue;
|
|
|
|
save_crtcs[count++] = connector->encoder->crtc;
|
|
|
|
if (connector->encoder->crtc == set->crtc)
|
|
new_crtc = NULL;
|
|
else
|
|
new_crtc = connector->encoder->crtc;
|
|
|
|
for (ro = 0; ro < set->num_connectors; ro++) {
|
|
if (set->connectors[ro] == connector)
|
|
new_crtc = set->crtc;
|
|
}
|
|
|
|
/* Make sure the new CRTC will work with the encoder */
|
|
if (new_crtc &&
|
|
!drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
|
|
ret = -EINVAL;
|
|
goto fail_set_mode;
|
|
}
|
|
if (new_crtc != connector->encoder->crtc) {
|
|
DRM_DEBUG("crtc changed, full mode switch\n");
|
|
mode_changed = true;
|
|
connector->encoder->crtc = new_crtc;
|
|
}
|
|
DRM_DEBUG("setting connector %d crtc to %p\n",
|
|
connector->base.id, new_crtc);
|
|
}
|
|
|
|
/* mode_set_base is not a required function */
|
|
if (fb_changed && !crtc_funcs->mode_set_base)
|
|
mode_changed = true;
|
|
|
|
if (mode_changed) {
|
|
old_fb = set->crtc->fb;
|
|
set->crtc->fb = set->fb;
|
|
set->crtc->enabled = (set->mode != NULL);
|
|
if (set->mode != NULL) {
|
|
DRM_DEBUG("attempting to set mode from userspace\n");
|
|
drm_mode_debug_printmodeline(set->mode);
|
|
if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
|
|
set->x, set->y,
|
|
old_fb)) {
|
|
DRM_ERROR("failed to set mode on crtc %p\n",
|
|
set->crtc);
|
|
ret = -EINVAL;
|
|
goto fail_set_mode;
|
|
}
|
|
/* TODO are these needed? */
|
|
set->crtc->desired_x = set->x;
|
|
set->crtc->desired_y = set->y;
|
|
set->crtc->desired_mode = set->mode;
|
|
}
|
|
drm_helper_disable_unused_functions(dev);
|
|
} else if (fb_changed) {
|
|
old_fb = set->crtc->fb;
|
|
if (set->crtc->fb != set->fb)
|
|
set->crtc->fb = set->fb;
|
|
ret = crtc_funcs->mode_set_base(set->crtc,
|
|
set->x, set->y, old_fb);
|
|
if (ret != 0)
|
|
goto fail_set_mode;
|
|
}
|
|
|
|
kfree(save_encoders);
|
|
kfree(save_crtcs);
|
|
return 0;
|
|
|
|
fail_set_mode:
|
|
set->crtc->enabled = save_enabled;
|
|
set->crtc->fb = old_fb;
|
|
count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
if (!connector->encoder)
|
|
continue;
|
|
|
|
connector->encoder->crtc = save_crtcs[count++];
|
|
}
|
|
fail_no_encoder:
|
|
kfree(save_crtcs);
|
|
count = 0;
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
|
|
connector->encoder = save_encoders[count++];
|
|
}
|
|
kfree(save_encoders);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(drm_crtc_helper_set_config);
|
|
|
|
bool drm_helper_plugged_event(struct drm_device *dev)
|
|
{
|
|
DRM_DEBUG("\n");
|
|
|
|
drm_helper_probe_connector_modes(dev, dev->mode_config.max_width,
|
|
dev->mode_config.max_height);
|
|
|
|
drm_setup_crtcs(dev);
|
|
|
|
/* alert the driver fb layer */
|
|
dev->mode_config.funcs->fb_changed(dev);
|
|
|
|
/* FIXME: send hotplug event */
|
|
return true;
|
|
}
|
|
/**
|
|
* drm_initial_config - setup a sane initial connector configuration
|
|
* @dev: DRM device
|
|
*
|
|
* LOCKING:
|
|
* Called at init time, must take mode config lock.
|
|
*
|
|
* Scan the CRTCs and connectors and try to put together an initial setup.
|
|
* At the moment, this is a cloned configuration across all heads with
|
|
* a new framebuffer object as the backing store.
|
|
*
|
|
* RETURNS:
|
|
* Zero if everything went ok, nonzero otherwise.
|
|
*/
|
|
bool drm_helper_initial_config(struct drm_device *dev)
|
|
{
|
|
struct drm_connector *connector;
|
|
int count = 0;
|
|
|
|
count = drm_helper_probe_connector_modes(dev,
|
|
dev->mode_config.max_width,
|
|
dev->mode_config.max_height);
|
|
|
|
/*
|
|
* None of the available connectors had any modes, so add some
|
|
* and try to light them up anyway
|
|
*/
|
|
if (!count) {
|
|
DRM_ERROR("connectors have no modes, using standard modes\n");
|
|
list_for_each_entry(connector,
|
|
&dev->mode_config.connector_list,
|
|
head)
|
|
drm_helper_add_std_modes(dev, connector);
|
|
}
|
|
|
|
drm_setup_crtcs(dev);
|
|
|
|
/* alert the driver fb layer */
|
|
dev->mode_config.funcs->fb_changed(dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_initial_config);
|
|
|
|
static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
|
|
{
|
|
int dpms = DRM_MODE_DPMS_OFF;
|
|
struct drm_connector *connector;
|
|
struct drm_device *dev = encoder->dev;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
|
|
if (connector->encoder == encoder)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
return dpms;
|
|
}
|
|
|
|
static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
|
|
{
|
|
int dpms = DRM_MODE_DPMS_OFF;
|
|
struct drm_connector *connector;
|
|
struct drm_device *dev = crtc->dev;
|
|
|
|
list_for_each_entry(connector, &dev->mode_config.connector_list, head)
|
|
if (connector->encoder && connector->encoder->crtc == crtc)
|
|
if (connector->dpms < dpms)
|
|
dpms = connector->dpms;
|
|
return dpms;
|
|
}
|
|
|
|
/**
|
|
* drm_helper_connector_dpms
|
|
* @connector affected connector
|
|
* @mode DPMS mode
|
|
*
|
|
* Calls the low-level connector DPMS function, then
|
|
* calls appropriate encoder and crtc DPMS functions as well
|
|
*/
|
|
void drm_helper_connector_dpms(struct drm_connector *connector, int mode)
|
|
{
|
|
struct drm_encoder *encoder = connector->encoder;
|
|
struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
|
|
int old_dpms;
|
|
|
|
if (mode == connector->dpms)
|
|
return;
|
|
|
|
old_dpms = connector->dpms;
|
|
connector->dpms = mode;
|
|
|
|
/* from off to on, do crtc then encoder */
|
|
if (mode < old_dpms) {
|
|
if (crtc) {
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
if (crtc_funcs->dpms)
|
|
(*crtc_funcs->dpms) (crtc,
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
}
|
|
if (encoder) {
|
|
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
|
|
if (encoder_funcs->dpms)
|
|
(*encoder_funcs->dpms) (encoder,
|
|
drm_helper_choose_encoder_dpms(encoder));
|
|
}
|
|
}
|
|
|
|
/* from on to off, do encoder then crtc */
|
|
if (mode > old_dpms) {
|
|
if (encoder) {
|
|
struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
|
|
if (encoder_funcs->dpms)
|
|
(*encoder_funcs->dpms) (encoder,
|
|
drm_helper_choose_encoder_dpms(encoder));
|
|
}
|
|
if (crtc) {
|
|
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
|
|
if (crtc_funcs->dpms)
|
|
(*crtc_funcs->dpms) (crtc,
|
|
drm_helper_choose_crtc_dpms(crtc));
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_connector_dpms);
|
|
|
|
/**
|
|
* drm_hotplug_stage_two
|
|
* @dev DRM device
|
|
* @connector hotpluged connector
|
|
*
|
|
* LOCKING.
|
|
* Caller must hold mode config lock, function might grab struct lock.
|
|
*
|
|
* Stage two of a hotplug.
|
|
*
|
|
* RETURNS:
|
|
* Zero on success, errno on failure.
|
|
*/
|
|
int drm_helper_hotplug_stage_two(struct drm_device *dev)
|
|
{
|
|
drm_helper_plugged_event(dev);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_hotplug_stage_two);
|
|
|
|
int drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
|
|
struct drm_mode_fb_cmd *mode_cmd)
|
|
{
|
|
fb->width = mode_cmd->width;
|
|
fb->height = mode_cmd->height;
|
|
fb->pitch = mode_cmd->pitch;
|
|
fb->bits_per_pixel = mode_cmd->bpp;
|
|
fb->depth = mode_cmd->depth;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_mode_fill_fb_struct);
|
|
|
|
int drm_helper_resume_force_mode(struct drm_device *dev)
|
|
{
|
|
struct drm_crtc *crtc;
|
|
int ret;
|
|
|
|
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
|
|
|
|
if (!crtc->enabled)
|
|
continue;
|
|
|
|
ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
|
|
crtc->x, crtc->y, crtc->fb);
|
|
|
|
if (ret == false)
|
|
DRM_ERROR("failed to set mode on crtc %p\n", crtc);
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_helper_resume_force_mode);
|