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drm/i915: Ignore LVDS EDID when it is unavailabe or invalid

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This trys to shut up complains about invalid LVDS EDID during
mode probe, but uses fixed panel mode directly for panels with
broken EDID.

https://bugs.freedesktop.org/show_bug.cgi?id=23099
https://bugs.freedesktop.org/show_bug.cgi?id=26395

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Tested-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Zhao Yakui 2010-04-07 17:11:22 +08:00 committed by Eric Anholt
parent 9875557ee8
commit bfac4d6725
2 changed files with 11 additions and 4 deletions
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2
drivers/gpu/drm/i915/i915_drv.h
View file

@ -611,6 +611,8 @@ typedef struct drm_i915_private {
/* Reclocking support */
bool render_reclock_avail;
bool lvds_downclock_avail;
/* indicate whether the LVDS EDID is OK */
bool lvds_edid_good;
/* indicates the reduced downclock for LVDS*/
int lvds_downclock;
struct work_struct idle_work;

13
drivers/gpu/drm/i915/intel_lvds.c
View file

@ -638,10 +638,12 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
struct drm_i915_private *dev_priv = dev->dev_private;
int ret = 0;
ret = intel_ddc_get_modes(intel_encoder);
if (dev_priv->lvds_edid_good) {
ret = intel_ddc_get_modes(intel_encoder);
if (ret)
return ret;
if (ret)
return ret;
}
/* Didn't get an EDID, so
* Set wide sync ranges so we get all modes
@ -1062,7 +1064,10 @@ void intel_lvds_init(struct drm_device *dev)
* Attempt to get the fixed panel mode from DDC. Assume that the
* preferred mode is the right one.
*/
intel_ddc_get_modes(intel_encoder);
dev_priv->lvds_edid_good = true;
if (!intel_ddc_get_modes(intel_encoder))
dev_priv->lvds_edid_good = false;
list_for_each_entry(scan, &connector->probed_modes, head) {
mutex_lock(&dev->mode_config.mutex);