2014-04-10 02:51:11 -06:00
|
|
|
/*
|
|
|
|
* Copyright (c) 2006-2008 Intel Corporation
|
|
|
|
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
|
|
|
|
*
|
|
|
|
* DRM core CRTC related functions
|
|
|
|
*
|
|
|
|
* Permission to use, copy, modify, distribute, and sell this software and its
|
|
|
|
* documentation for any purpose is hereby granted without fee, provided that
|
|
|
|
* the above copyright notice appear in all copies and that both that copyright
|
|
|
|
* notice and this permission notice appear in supporting documentation, and
|
|
|
|
* that the name of the copyright holders not be used in advertising or
|
|
|
|
* publicity pertaining to distribution of the software without specific,
|
|
|
|
* written prior permission. The copyright holders make no representations
|
|
|
|
* about the suitability of this software for any purpose. It is provided "as
|
|
|
|
* is" without express or implied warranty.
|
|
|
|
*
|
|
|
|
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
|
|
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
|
|
|
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
|
|
|
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
|
|
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
|
|
|
* OF THIS SOFTWARE.
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Keith Packard
|
|
|
|
* Eric Anholt <eric@anholt.net>
|
|
|
|
* Dave Airlie <airlied@linux.ie>
|
|
|
|
* Jesse Barnes <jesse.barnes@intel.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/export.h>
|
|
|
|
#include <linux/moduleparam.h>
|
|
|
|
|
|
|
|
#include <drm/drmP.h>
|
|
|
|
#include <drm/drm_crtc.h>
|
|
|
|
#include <drm/drm_fourcc.h>
|
|
|
|
#include <drm/drm_crtc_helper.h>
|
|
|
|
#include <drm/drm_fb_helper.h>
|
|
|
|
#include <drm/drm_edid.h>
|
|
|
|
|
|
|
|
/**
|
|
|
|
* DOC: output probing helper overview
|
|
|
|
*
|
|
|
|
* This library provides some helper code for output probing. It provides an
|
2017-01-24 23:26:43 -07:00
|
|
|
* implementation of the core &drm_connector_funcs.fill_modes interface with
|
2017-04-04 03:53:04 -06:00
|
|
|
* drm_helper_probe_single_connector_modes().
|
2014-04-10 02:51:11 -06:00
|
|
|
*
|
|
|
|
* It also provides support for polling connectors with a work item and for
|
|
|
|
* generic hotplug interrupt handling where the driver doesn't or cannot keep
|
|
|
|
* track of a per-connector hpd interrupt.
|
|
|
|
*
|
|
|
|
* This helper library can be used independently of the modeset helper library.
|
|
|
|
* Drivers can also overwrite different parts e.g. use their own hotplug
|
|
|
|
* handling code to avoid probing unrelated outputs.
|
2015-12-04 01:45:44 -07:00
|
|
|
*
|
|
|
|
* The probe helpers share the function table structures with other display
|
2016-12-29 13:48:26 -07:00
|
|
|
* helper libraries. See &struct drm_connector_helper_funcs for the details.
|
2014-04-10 02:51:11 -06:00
|
|
|
*/
|
|
|
|
|
|
|
|
static bool drm_kms_helper_poll = true;
|
|
|
|
module_param_named(poll, drm_kms_helper_poll, bool, 0600);
|
|
|
|
|
2014-12-17 04:56:22 -07:00
|
|
|
static enum drm_mode_status
|
|
|
|
drm_mode_validate_flag(const struct drm_display_mode *mode,
|
|
|
|
int flags)
|
2014-04-10 02:51:11 -06:00
|
|
|
{
|
2014-12-17 04:56:22 -07:00
|
|
|
if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
|
|
|
|
!(flags & DRM_MODE_FLAG_INTERLACE))
|
|
|
|
return MODE_NO_INTERLACE;
|
2014-04-10 02:51:11 -06:00
|
|
|
|
2014-12-17 04:56:22 -07:00
|
|
|
if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
|
|
|
|
!(flags & DRM_MODE_FLAG_DBLSCAN))
|
|
|
|
return MODE_NO_DBLESCAN;
|
2014-04-10 02:51:11 -06:00
|
|
|
|
2014-12-17 04:56:22 -07:00
|
|
|
if ((mode->flags & DRM_MODE_FLAG_3D_MASK) &&
|
|
|
|
!(flags & DRM_MODE_FLAG_3D_MASK))
|
|
|
|
return MODE_NO_STEREO;
|
2014-04-10 02:51:11 -06:00
|
|
|
|
2014-12-17 04:56:22 -07:00
|
|
|
return MODE_OK;
|
2014-04-10 02:51:11 -06:00
|
|
|
}
|
|
|
|
|
2014-08-06 02:08:32 -06:00
|
|
|
static int drm_helper_probe_add_cmdline_mode(struct drm_connector *connector)
|
|
|
|
{
|
2016-06-01 03:50:51 -06:00
|
|
|
struct drm_cmdline_mode *cmdline_mode;
|
2014-08-06 02:08:32 -06:00
|
|
|
struct drm_display_mode *mode;
|
|
|
|
|
2016-06-01 03:50:51 -06:00
|
|
|
cmdline_mode = &connector->cmdline_mode;
|
|
|
|
if (!cmdline_mode->specified)
|
2014-08-06 02:08:32 -06:00
|
|
|
return 0;
|
|
|
|
|
2016-06-01 03:50:51 -06:00
|
|
|
/* Only add a GTF mode if we find no matching probed modes */
|
|
|
|
list_for_each_entry(mode, &connector->probed_modes, head) {
|
|
|
|
if (mode->hdisplay != cmdline_mode->xres ||
|
|
|
|
mode->vdisplay != cmdline_mode->yres)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (cmdline_mode->refresh_specified) {
|
|
|
|
/* The probed mode's vrefresh is set until later */
|
|
|
|
if (drm_mode_vrefresh(mode) != cmdline_mode->refresh)
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2014-08-06 02:08:32 -06:00
|
|
|
mode = drm_mode_create_from_cmdline_mode(connector->dev,
|
2016-06-01 03:50:51 -06:00
|
|
|
cmdline_mode);
|
2014-08-06 02:08:32 -06:00
|
|
|
if (mode == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
drm_mode_probed_add(connector, mode);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2015-07-09 15:44:26 -06:00
|
|
|
#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
|
2015-09-23 08:13:00 -06:00
|
|
|
/**
|
2017-01-26 19:04:08 -07:00
|
|
|
* drm_kms_helper_poll_enable - re-enable output polling.
|
2015-09-23 08:13:00 -06:00
|
|
|
* @dev: drm_device
|
|
|
|
*
|
2017-01-26 19:04:08 -07:00
|
|
|
* This function re-enables the output polling work, after it has been
|
|
|
|
* temporarily disabled using drm_kms_helper_poll_disable(), for example over
|
|
|
|
* suspend/resume.
|
2015-09-23 08:13:00 -06:00
|
|
|
*
|
2017-01-26 19:04:08 -07:00
|
|
|
* Drivers can call this helper from their device resume implementation. It is
|
|
|
|
* an error to call this when the output polling support has not yet been set
|
|
|
|
* up.
|
|
|
|
*
|
|
|
|
* Note that calls to enable and disable polling must be strictly ordered, which
|
|
|
|
* is automatically the case when they're only call from suspend/resume
|
|
|
|
* callbacks.
|
2015-09-23 08:13:00 -06:00
|
|
|
*/
|
2017-01-26 19:04:08 -07:00
|
|
|
void drm_kms_helper_poll_enable(struct drm_device *dev)
|
2015-07-09 15:44:26 -06:00
|
|
|
{
|
|
|
|
bool poll = false;
|
|
|
|
struct drm_connector *connector;
|
2016-12-15 08:58:43 -07:00
|
|
|
struct drm_connector_list_iter conn_iter;
|
2016-08-31 05:09:05 -06:00
|
|
|
unsigned long delay = DRM_OUTPUT_POLL_PERIOD;
|
2015-07-09 15:44:26 -06:00
|
|
|
|
|
|
|
if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
|
|
|
|
return;
|
|
|
|
|
2017-02-28 07:46:43 -07:00
|
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
2016-12-15 08:58:43 -07:00
|
|
|
drm_for_each_connector_iter(connector, &conn_iter) {
|
2015-07-09 15:44:26 -06:00
|
|
|
if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |
|
|
|
|
DRM_CONNECTOR_POLL_DISCONNECT))
|
|
|
|
poll = true;
|
|
|
|
}
|
2017-02-28 07:46:43 -07:00
|
|
|
drm_connector_list_iter_end(&conn_iter);
|
2015-07-09 15:44:26 -06:00
|
|
|
|
2016-08-31 05:09:05 -06:00
|
|
|
if (dev->mode_config.delayed_event) {
|
2017-01-09 07:31:58 -07:00
|
|
|
/*
|
|
|
|
* FIXME:
|
|
|
|
*
|
|
|
|
* Use short (1s) delay to handle the initial delayed event.
|
|
|
|
* This delay should not be needed, but Optimus/nouveau will
|
|
|
|
* fail in a mysterious way if the delayed event is handled as
|
|
|
|
* soon as possible like it is done in
|
|
|
|
* drm_helper_probe_single_connector_modes() in case the poll
|
|
|
|
* was enabled before.
|
|
|
|
*/
|
2016-08-31 05:09:05 -06:00
|
|
|
poll = true;
|
2017-01-09 07:31:58 -07:00
|
|
|
delay = HZ;
|
2016-08-31 05:09:05 -06:00
|
|
|
}
|
|
|
|
|
2015-07-09 15:44:26 -06:00
|
|
|
if (poll)
|
2016-08-31 05:09:05 -06:00
|
|
|
schedule_delayed_work(&dev->mode_config.output_poll_work, delay);
|
2015-07-09 15:44:26 -06:00
|
|
|
}
|
2017-01-26 19:04:08 -07:00
|
|
|
EXPORT_SYMBOL(drm_kms_helper_poll_enable);
|
2015-09-23 08:13:00 -06:00
|
|
|
|
2016-11-29 13:56:30 -07:00
|
|
|
static enum drm_connector_status
|
|
|
|
drm_connector_detect(struct drm_connector *connector, bool force)
|
|
|
|
{
|
|
|
|
return connector->funcs->detect ?
|
|
|
|
connector->funcs->detect(connector, force) :
|
|
|
|
connector_status_connected;
|
|
|
|
}
|
|
|
|
|
2015-12-03 14:14:14 -07:00
|
|
|
/**
|
|
|
|
* drm_helper_probe_single_connector_modes - get complete set of display modes
|
|
|
|
* @connector: connector to probe
|
|
|
|
* @maxX: max width for modes
|
|
|
|
* @maxY: max height for modes
|
|
|
|
*
|
|
|
|
* Based on the helper callbacks implemented by @connector in struct
|
|
|
|
* &drm_connector_helper_funcs try to detect all valid modes. Modes will first
|
|
|
|
* be added to the connector's probed_modes list, then culled (based on validity
|
|
|
|
* and the @maxX, @maxY parameters) and put into the normal modes list.
|
|
|
|
*
|
2017-01-24 23:26:43 -07:00
|
|
|
* Intended to be used as a generic implementation of the
|
|
|
|
* &drm_connector_funcs.fill_modes() vfunc for drivers that use the CRTC helpers
|
|
|
|
* for output mode filtering and detection.
|
2015-12-03 14:14:14 -07:00
|
|
|
*
|
2015-12-10 14:13:57 -07:00
|
|
|
* The basic procedure is as follows
|
|
|
|
*
|
|
|
|
* 1. All modes currently on the connector's modes list are marked as stale
|
|
|
|
*
|
|
|
|
* 2. New modes are added to the connector's probed_modes list with
|
|
|
|
* drm_mode_probed_add(). New modes start their life with status as OK.
|
|
|
|
* Modes are added from a single source using the following priority order.
|
|
|
|
*
|
|
|
|
* - debugfs 'override_edid' (used for testing only)
|
|
|
|
* - firmware EDID (drm_load_edid_firmware())
|
2017-01-24 23:26:43 -07:00
|
|
|
* - &drm_connector_helper_funcs.get_modes vfunc
|
2015-12-10 14:13:57 -07:00
|
|
|
* - if the connector status is connector_status_connected, standard
|
|
|
|
* VESA DMT modes up to 1024x768 are automatically added
|
|
|
|
* (drm_add_modes_noedid())
|
|
|
|
*
|
|
|
|
* Finally modes specified via the kernel command line (video=...) are
|
|
|
|
* added in addition to what the earlier probes produced
|
|
|
|
* (drm_helper_probe_add_cmdline_mode()). These modes are generated
|
|
|
|
* using the VESA GTF/CVT formulas.
|
|
|
|
*
|
|
|
|
* 3. Modes are moved from the probed_modes list to the modes list. Potential
|
|
|
|
* duplicates are merged together (see drm_mode_connector_list_update()).
|
|
|
|
* After this step the probed_modes list will be empty again.
|
|
|
|
*
|
|
|
|
* 4. Any non-stale mode on the modes list then undergoes validation
|
|
|
|
*
|
|
|
|
* - drm_mode_validate_basic() performs basic sanity checks
|
|
|
|
* - drm_mode_validate_size() filters out modes larger than @maxX and @maxY
|
|
|
|
* (if specified)
|
2017-02-27 15:29:12 -07:00
|
|
|
* - drm_mode_validate_flag() checks the modes against basic connector
|
|
|
|
* capabilities (interlace_allowed,doublescan_allowed,stereo_allowed)
|
2017-01-24 23:26:43 -07:00
|
|
|
* - the optional &drm_connector_helper_funcs.mode_valid helper can perform
|
|
|
|
* driver and/or hardware specific checks
|
2015-12-10 14:13:57 -07:00
|
|
|
*
|
|
|
|
* 5. Any mode whose status is not OK is pruned from the connector's modes list,
|
|
|
|
* accompanied by a debug message indicating the reason for the mode's
|
|
|
|
* rejection (see drm_mode_prune_invalid()).
|
2015-12-03 14:14:14 -07:00
|
|
|
*
|
|
|
|
* Returns:
|
|
|
|
* The number of modes found on @connector.
|
|
|
|
*/
|
|
|
|
int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
|
|
|
|
uint32_t maxX, uint32_t maxY)
|
2014-04-10 02:51:11 -06:00
|
|
|
{
|
|
|
|
struct drm_device *dev = connector->dev;
|
|
|
|
struct drm_display_mode *mode;
|
2015-03-11 03:51:06 -06:00
|
|
|
const struct drm_connector_helper_funcs *connector_funcs =
|
2014-04-10 02:51:11 -06:00
|
|
|
connector->helper_private;
|
|
|
|
int count = 0;
|
|
|
|
int mode_flags = 0;
|
|
|
|
bool verbose_prune = true;
|
2015-01-21 00:45:21 -07:00
|
|
|
enum drm_connector_status old_status;
|
2014-04-10 02:51:11 -06:00
|
|
|
|
|
|
|
WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
|
|
|
|
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
|
2014-06-03 05:56:20 -06:00
|
|
|
connector->name);
|
2015-12-10 13:39:08 -07:00
|
|
|
/* set all old modes to the stale state */
|
2014-04-10 02:51:11 -06:00
|
|
|
list_for_each_entry(mode, &connector->modes, head)
|
2015-12-10 13:39:08 -07:00
|
|
|
mode->status = MODE_STALE;
|
2014-04-10 02:51:11 -06:00
|
|
|
|
2015-11-19 09:46:50 -07:00
|
|
|
old_status = connector->status;
|
|
|
|
|
2014-04-10 02:51:11 -06:00
|
|
|
if (connector->force) {
|
2014-11-03 18:51:45 -07:00
|
|
|
if (connector->force == DRM_FORCE_ON ||
|
|
|
|
connector->force == DRM_FORCE_ON_DIGITAL)
|
2014-04-10 02:51:11 -06:00
|
|
|
connector->status = connector_status_connected;
|
|
|
|
else
|
|
|
|
connector->status = connector_status_disconnected;
|
|
|
|
if (connector->funcs->force)
|
|
|
|
connector->funcs->force(connector);
|
|
|
|
} else {
|
2016-11-29 13:56:30 -07:00
|
|
|
connector->status = drm_connector_detect(connector, true);
|
2015-11-19 09:46:50 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Normally either the driver's hpd code or the poll loop should
|
|
|
|
* pick up any changes and fire the hotplug event. But if
|
|
|
|
* userspace sneaks in a probe, we might miss a change. Hence
|
|
|
|
* check here, and if anything changed start the hotplug code.
|
|
|
|
*/
|
|
|
|
if (old_status != connector->status) {
|
2015-12-03 05:00:03 -07:00
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
|
2015-11-19 09:46:50 -07:00
|
|
|
connector->base.id,
|
|
|
|
connector->name,
|
2015-12-03 05:00:03 -07:00
|
|
|
drm_get_connector_status_name(old_status),
|
|
|
|
drm_get_connector_status_name(connector->status));
|
2015-01-21 00:45:21 -07:00
|
|
|
|
|
|
|
/*
|
2015-11-19 09:46:50 -07:00
|
|
|
* The hotplug event code might call into the fb
|
|
|
|
* helpers, and so expects that we do not hold any
|
|
|
|
* locks. Fire up the poll struct instead, it will
|
|
|
|
* disable itself again.
|
2015-01-21 00:45:21 -07:00
|
|
|
*/
|
2015-11-19 09:46:50 -07:00
|
|
|
dev->mode_config.delayed_event = true;
|
|
|
|
if (dev->mode_config.poll_enabled)
|
|
|
|
schedule_delayed_work(&dev->mode_config.output_poll_work,
|
|
|
|
0);
|
2014-04-10 02:51:11 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Re-enable polling in case the global poll config changed. */
|
|
|
|
if (drm_kms_helper_poll != dev->mode_config.poll_running)
|
2017-01-26 19:04:08 -07:00
|
|
|
drm_kms_helper_poll_enable(dev);
|
2014-04-10 02:51:11 -06:00
|
|
|
|
|
|
|
dev->mode_config.poll_running = drm_kms_helper_poll;
|
|
|
|
|
|
|
|
if (connector->status == connector_status_disconnected) {
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
|
2014-06-03 05:56:20 -06:00
|
|
|
connector->base.id, connector->name);
|
2014-04-10 02:51:11 -06:00
|
|
|
drm_mode_connector_update_edid_property(connector, NULL);
|
|
|
|
verbose_prune = false;
|
|
|
|
goto prune;
|
|
|
|
}
|
|
|
|
|
2015-12-10 14:13:56 -07:00
|
|
|
if (connector->override_edid) {
|
|
|
|
struct edid *edid = (struct edid *) connector->edid_blob_ptr->data;
|
|
|
|
|
|
|
|
count = drm_add_edid_modes(connector, edid);
|
|
|
|
drm_edid_to_eld(connector, edid);
|
|
|
|
} else {
|
2017-02-17 08:20:51 -07:00
|
|
|
struct edid *edid = drm_load_edid_firmware(connector);
|
|
|
|
if (!IS_ERR_OR_NULL(edid)) {
|
|
|
|
drm_mode_connector_update_edid_property(connector, edid);
|
|
|
|
count = drm_add_edid_modes(connector, edid);
|
|
|
|
drm_edid_to_eld(connector, edid);
|
|
|
|
kfree(edid);
|
|
|
|
}
|
2015-12-10 14:13:56 -07:00
|
|
|
if (count == 0)
|
2014-06-18 10:52:33 -06:00
|
|
|
count = (*connector_funcs->get_modes)(connector);
|
|
|
|
}
|
2014-04-10 02:51:11 -06:00
|
|
|
|
|
|
|
if (count == 0 && connector->status == connector_status_connected)
|
|
|
|
count = drm_add_modes_noedid(connector, 1024, 768);
|
2014-08-06 02:08:32 -06:00
|
|
|
count += drm_helper_probe_add_cmdline_mode(connector);
|
2014-04-10 02:51:11 -06:00
|
|
|
if (count == 0)
|
|
|
|
goto prune;
|
|
|
|
|
2015-12-03 14:14:14 -07:00
|
|
|
drm_mode_connector_list_update(connector);
|
2014-04-10 02:51:11 -06:00
|
|
|
|
|
|
|
if (connector->interlace_allowed)
|
|
|
|
mode_flags |= DRM_MODE_FLAG_INTERLACE;
|
|
|
|
if (connector->doublescan_allowed)
|
|
|
|
mode_flags |= DRM_MODE_FLAG_DBLSCAN;
|
|
|
|
if (connector->stereo_allowed)
|
|
|
|
mode_flags |= DRM_MODE_FLAG_3D_MASK;
|
|
|
|
|
|
|
|
list_for_each_entry(mode, &connector->modes, head) {
|
2015-12-03 14:14:09 -07:00
|
|
|
if (mode->status == MODE_OK)
|
|
|
|
mode->status = drm_mode_validate_basic(mode);
|
2014-12-17 04:56:23 -07:00
|
|
|
|
|
|
|
if (mode->status == MODE_OK)
|
|
|
|
mode->status = drm_mode_validate_size(mode, maxX, maxY);
|
2014-12-17 04:56:22 -07:00
|
|
|
|
|
|
|
if (mode->status == MODE_OK)
|
|
|
|
mode->status = drm_mode_validate_flag(mode, mode_flags);
|
|
|
|
|
2014-04-02 04:29:46 -06:00
|
|
|
if (mode->status == MODE_OK && connector_funcs->mode_valid)
|
2014-04-10 02:51:11 -06:00
|
|
|
mode->status = connector_funcs->mode_valid(connector,
|
|
|
|
mode);
|
|
|
|
}
|
|
|
|
|
|
|
|
prune:
|
|
|
|
drm_mode_prune_invalid(dev, &connector->modes, verbose_prune);
|
|
|
|
|
|
|
|
if (list_empty(&connector->modes))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
list_for_each_entry(mode, &connector->modes, head)
|
|
|
|
mode->vrefresh = drm_mode_vrefresh(mode);
|
|
|
|
|
|
|
|
drm_mode_sort(&connector->modes);
|
|
|
|
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
|
2014-06-03 05:56:20 -06:00
|
|
|
connector->name);
|
2014-04-10 02:51:11 -06:00
|
|
|
list_for_each_entry(mode, &connector->modes, head) {
|
|
|
|
drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
|
|
|
|
drm_mode_debug_printmodeline(mode);
|
|
|
|
}
|
|
|
|
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* drm_kms_helper_hotplug_event - fire off KMS hotplug events
|
|
|
|
* @dev: drm_device whose connector state changed
|
|
|
|
*
|
|
|
|
* This function fires off the uevent for userspace and also calls the
|
|
|
|
* output_poll_changed function, which is most commonly used to inform the fbdev
|
|
|
|
* emulation code and allow it to update the fbcon output configuration.
|
|
|
|
*
|
|
|
|
* Drivers should call this from their hotplug handling code when a change is
|
|
|
|
* detected. Note that this function does not do any output detection of its
|
|
|
|
* own, like drm_helper_hpd_irq_event() does - this is assumed to be done by the
|
|
|
|
* driver already.
|
|
|
|
*
|
|
|
|
* This function must be called from process context with no mode
|
|
|
|
* setting locks held.
|
|
|
|
*/
|
|
|
|
void drm_kms_helper_hotplug_event(struct drm_device *dev)
|
|
|
|
{
|
|
|
|
/* send a uevent + call fbdev */
|
|
|
|
drm_sysfs_hotplug_event(dev);
|
|
|
|
if (dev->mode_config.funcs->output_poll_changed)
|
|
|
|
dev->mode_config.funcs->output_poll_changed(dev);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_kms_helper_hotplug_event);
|
|
|
|
|
|
|
|
static void output_poll_execute(struct work_struct *work)
|
|
|
|
{
|
|
|
|
struct delayed_work *delayed_work = to_delayed_work(work);
|
|
|
|
struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
|
|
|
|
struct drm_connector *connector;
|
2016-12-15 08:58:43 -07:00
|
|
|
struct drm_connector_list_iter conn_iter;
|
2014-04-10 02:51:11 -06:00
|
|
|
enum drm_connector_status old_status;
|
2015-01-21 00:45:21 -07:00
|
|
|
bool repoll = false, changed;
|
|
|
|
|
|
|
|
/* Pick up any changes detected by the probe functions. */
|
|
|
|
changed = dev->mode_config.delayed_event;
|
|
|
|
dev->mode_config.delayed_event = false;
|
2014-04-10 02:51:11 -06:00
|
|
|
|
|
|
|
if (!drm_kms_helper_poll)
|
2015-01-21 00:45:21 -07:00
|
|
|
goto out;
|
2014-04-10 02:51:11 -06:00
|
|
|
|
2016-12-06 04:37:15 -07:00
|
|
|
if (!mutex_trylock(&dev->mode_config.mutex)) {
|
|
|
|
repoll = true;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2017-02-28 07:46:43 -07:00
|
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
2016-12-15 08:58:43 -07:00
|
|
|
drm_for_each_connector_iter(connector, &conn_iter) {
|
2014-04-10 02:51:11 -06:00
|
|
|
/* Ignore forced connectors. */
|
|
|
|
if (connector->force)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Ignore HPD capable connectors and connectors where we don't
|
|
|
|
* want any hotplug detection at all for polling. */
|
|
|
|
if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
old_status = connector->status;
|
|
|
|
/* if we are connected and don't want to poll for disconnect
|
|
|
|
skip it */
|
|
|
|
if (old_status == connector_status_connected &&
|
|
|
|
!(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))
|
|
|
|
continue;
|
|
|
|
|
2015-04-16 06:16:29 -06:00
|
|
|
repoll = true;
|
|
|
|
|
2016-11-29 13:56:30 -07:00
|
|
|
connector->status = drm_connector_detect(connector, false);
|
2014-04-10 02:51:11 -06:00
|
|
|
if (old_status != connector->status) {
|
|
|
|
const char *old, *new;
|
|
|
|
|
2015-01-21 00:45:22 -07:00
|
|
|
/*
|
|
|
|
* The poll work sets force=false when calling detect so
|
|
|
|
* that drivers can avoid to do disruptive tests (e.g.
|
|
|
|
* when load detect cycles could cause flickering on
|
|
|
|
* other, running displays). This bears the risk that we
|
|
|
|
* flip-flop between unknown here in the poll work and
|
|
|
|
* the real state when userspace forces a full detect
|
|
|
|
* call after receiving a hotplug event due to this
|
|
|
|
* change.
|
|
|
|
*
|
|
|
|
* Hence clamp an unknown detect status to the old
|
|
|
|
* value.
|
|
|
|
*/
|
|
|
|
if (connector->status == connector_status_unknown) {
|
|
|
|
connector->status = old_status;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2014-04-10 02:51:11 -06:00
|
|
|
old = drm_get_connector_status_name(old_status);
|
|
|
|
new = drm_get_connector_status_name(connector->status);
|
|
|
|
|
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
|
|
|
|
"status updated from %s to %s\n",
|
|
|
|
connector->base.id,
|
2014-06-03 05:56:20 -06:00
|
|
|
connector->name,
|
2014-04-10 02:51:11 -06:00
|
|
|
old, new);
|
|
|
|
|
|
|
|
changed = true;
|
|
|
|
}
|
|
|
|
}
|
2017-02-28 07:46:43 -07:00
|
|
|
drm_connector_list_iter_end(&conn_iter);
|
2014-04-10 02:51:11 -06:00
|
|
|
|
|
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
|
|
|
2015-01-21 00:45:21 -07:00
|
|
|
out:
|
2014-04-10 02:51:11 -06:00
|
|
|
if (changed)
|
|
|
|
drm_kms_helper_hotplug_event(dev);
|
|
|
|
|
|
|
|
if (repoll)
|
|
|
|
schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* drm_kms_helper_poll_disable - disable output polling
|
|
|
|
* @dev: drm_device
|
|
|
|
*
|
|
|
|
* This function disables the output polling work.
|
|
|
|
*
|
|
|
|
* Drivers can call this helper from their device suspend implementation. It is
|
2017-01-26 19:04:08 -07:00
|
|
|
* not an error to call this even when output polling isn't enabled or already
|
|
|
|
* disabled. Polling is re-enabled by calling drm_kms_helper_poll_enable().
|
|
|
|
*
|
|
|
|
* Note that calls to enable and disable polling must be strictly ordered, which
|
|
|
|
* is automatically the case when they're only call from suspend/resume
|
|
|
|
* callbacks.
|
2014-04-10 02:51:11 -06:00
|
|
|
*/
|
|
|
|
void drm_kms_helper_poll_disable(struct drm_device *dev)
|
|
|
|
{
|
|
|
|
if (!dev->mode_config.poll_enabled)
|
|
|
|
return;
|
|
|
|
cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_kms_helper_poll_disable);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* drm_kms_helper_poll_init - initialize and enable output polling
|
|
|
|
* @dev: drm_device
|
|
|
|
*
|
|
|
|
* This function intializes and then also enables output polling support for
|
|
|
|
* @dev. Drivers which do not have reliable hotplug support in hardware can use
|
|
|
|
* this helper infrastructure to regularly poll such connectors for changes in
|
|
|
|
* their connection state.
|
|
|
|
*
|
|
|
|
* Drivers can control which connectors are polled by setting the
|
|
|
|
* DRM_CONNECTOR_POLL_CONNECT and DRM_CONNECTOR_POLL_DISCONNECT flags. On
|
|
|
|
* connectors where probing live outputs can result in visual distortion drivers
|
|
|
|
* should not set the DRM_CONNECTOR_POLL_DISCONNECT flag to avoid this.
|
|
|
|
* Connectors which have no flag or only DRM_CONNECTOR_POLL_HPD set are
|
|
|
|
* completely ignored by the polling logic.
|
|
|
|
*
|
|
|
|
* Note that a connector can be both polled and probed from the hotplug handler,
|
|
|
|
* in case the hotplug interrupt is known to be unreliable.
|
|
|
|
*/
|
|
|
|
void drm_kms_helper_poll_init(struct drm_device *dev)
|
|
|
|
{
|
|
|
|
INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
|
|
|
|
dev->mode_config.poll_enabled = true;
|
|
|
|
|
|
|
|
drm_kms_helper_poll_enable(dev);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_kms_helper_poll_init);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* drm_kms_helper_poll_fini - disable output polling and clean it up
|
|
|
|
* @dev: drm_device
|
|
|
|
*/
|
|
|
|
void drm_kms_helper_poll_fini(struct drm_device *dev)
|
|
|
|
{
|
|
|
|
drm_kms_helper_poll_disable(dev);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_kms_helper_poll_fini);
|
|
|
|
|
|
|
|
/**
|
|
|
|
* drm_helper_hpd_irq_event - hotplug processing
|
|
|
|
* @dev: drm_device
|
|
|
|
*
|
|
|
|
* Drivers can use this helper function to run a detect cycle on all connectors
|
|
|
|
* which have the DRM_CONNECTOR_POLL_HPD flag set in their &polled member. All
|
|
|
|
* other connectors are ignored, which is useful to avoid reprobing fixed
|
|
|
|
* panels.
|
|
|
|
*
|
|
|
|
* This helper function is useful for drivers which can't or don't track hotplug
|
|
|
|
* interrupts for each connector.
|
|
|
|
*
|
|
|
|
* Drivers which support hotplug interrupts for each connector individually and
|
|
|
|
* which have a more fine-grained detect logic should bypass this code and
|
|
|
|
* directly call drm_kms_helper_hotplug_event() in case the connector state
|
|
|
|
* changed.
|
|
|
|
*
|
|
|
|
* This function must be called from process context with no mode
|
|
|
|
* setting locks held.
|
|
|
|
*
|
|
|
|
* Note that a connector can be both polled and probed from the hotplug handler,
|
|
|
|
* in case the hotplug interrupt is known to be unreliable.
|
|
|
|
*/
|
|
|
|
bool drm_helper_hpd_irq_event(struct drm_device *dev)
|
|
|
|
{
|
|
|
|
struct drm_connector *connector;
|
2016-12-15 08:58:43 -07:00
|
|
|
struct drm_connector_list_iter conn_iter;
|
2014-04-10 02:51:11 -06:00
|
|
|
enum drm_connector_status old_status;
|
|
|
|
bool changed = false;
|
|
|
|
|
|
|
|
if (!dev->mode_config.poll_enabled)
|
|
|
|
return false;
|
|
|
|
|
|
|
|
mutex_lock(&dev->mode_config.mutex);
|
2017-02-28 07:46:43 -07:00
|
|
|
drm_connector_list_iter_begin(dev, &conn_iter);
|
2016-12-15 08:58:43 -07:00
|
|
|
drm_for_each_connector_iter(connector, &conn_iter) {
|
2014-04-10 02:51:11 -06:00
|
|
|
/* Only handle HPD capable connectors. */
|
|
|
|
if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
old_status = connector->status;
|
|
|
|
|
2016-11-29 13:56:30 -07:00
|
|
|
connector->status = drm_connector_detect(connector, false);
|
2014-04-10 02:51:11 -06:00
|
|
|
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
|
|
|
|
connector->base.id,
|
2014-06-03 05:56:20 -06:00
|
|
|
connector->name,
|
2014-04-10 02:51:11 -06:00
|
|
|
drm_get_connector_status_name(old_status),
|
|
|
|
drm_get_connector_status_name(connector->status));
|
|
|
|
if (old_status != connector->status)
|
|
|
|
changed = true;
|
|
|
|
}
|
2017-02-28 07:46:43 -07:00
|
|
|
drm_connector_list_iter_end(&conn_iter);
|
2014-04-10 02:51:11 -06:00
|
|
|
mutex_unlock(&dev->mode_config.mutex);
|
|
|
|
|
|
|
|
if (changed)
|
|
|
|
drm_kms_helper_hotplug_event(dev);
|
|
|
|
|
|
|
|
return changed;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL(drm_helper_hpd_irq_event);
|