Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-12 15:11:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915: Return SDVO LVDS VBT mode if no EDID modes are detected.

Browse Source 
Some new SDVO LVDS hardware doesn't have DDC available, and this should
fix the display on it.

Signed-off-by: Ma Ling <ling.ma@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Ma Ling 2009-05-13 11:20:06 +08:00 committed by Eric Anholt
parent 8863170628
commit 7086c87fb1
1 changed files with 41 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/gpu/drm/i915/intel_sdvo.c
View File

@ -69,6 +69,10 @@ struct intel_sdvo_priv {
* This is set if we treat the device as HDMI, instead of DVI.
*/
bool is_hdmi;
/**
* This is set if we detect output of sdvo device as LVDS.
*/
bool is_lvds;
/**
* Returned SDTV resolutions allowed for the current format, if the
@ -1543,6 +1547,37 @@ static void intel_sdvo_get_tv_modes(struct drm_connector *connector)
}
}
static void intel_sdvo_get_lvds_modes(struct drm_connector *connector)
{
struct intel_output *intel_output = to_intel_output(connector);
struct intel_sdvo_priv *sdvo_priv = intel_output->dev_priv;
struct drm_i915_private *dev_priv = connector->dev->dev_private;
/*
* Attempt to get the mode list from DDC.
* Assume that the preferred modes are
* arranged in priority order.
*/
/* set the bus switch and get the modes */
intel_sdvo_set_control_bus_switch(intel_output, sdvo_priv->ddc_bus);
intel_ddc_get_modes(intel_output);
if (list_empty(&connector->probed_modes) == false)
return;
/* Fetch modes from VBT */
if (dev_priv->sdvo_lvds_vbt_mode != NULL) {
struct drm_display_mode *newmode;
newmode = drm_mode_duplicate(connector->dev,
dev_priv->sdvo_lvds_vbt_mode);
if (newmode != NULL) {
/* Guarantee the mode is preferred */
newmode->type = (DRM_MODE_TYPE_PREFERRED |
DRM_MODE_TYPE_DRIVER);
drm_mode_probed_add(connector, newmode);
}
}
}
static int intel_sdvo_get_modes(struct drm_connector *connector)
{
struct intel_output *output = to_intel_output(connector);
@ -1550,6 +1585,8 @@ static int intel_sdvo_get_modes(struct drm_connector *connector)
if (sdvo_priv->is_tv)
intel_sdvo_get_tv_modes(connector);
else if (sdvo_priv->is_lvds == true)
intel_sdvo_get_lvds_modes(connector);
else
intel_sdvo_get_ddc_modes(connector);
@ -1720,6 +1757,8 @@ bool intel_sdvo_init(struct drm_device *dev, int output_device)
}
}
/* In defaut case sdvo lvds is false */
sdvo_priv->is_lvds = false;
intel_sdvo_get_capabilities(intel_output, &sdvo_priv->caps);
if (sdvo_priv->caps.output_flags &
@ -1773,6 +1812,7 @@ bool intel_sdvo_init(struct drm_device *dev, int output_device)
connector->display_info.subpixel_order = SubPixelHorizontalRGB;
encoder_type = DRM_MODE_ENCODER_LVDS;
connector_type = DRM_MODE_CONNECTOR_LVDS;
sdvo_priv->is_lvds = true;
}
else if (sdvo_priv->caps.output_flags & SDVO_OUTPUT_LVDS1)
{
@ -1780,6 +1820,7 @@ bool intel_sdvo_init(struct drm_device *dev, int output_device)
connector->display_info.subpixel_order = SubPixelHorizontalRGB;
encoder_type = DRM_MODE_ENCODER_LVDS;
connector_type = DRM_MODE_CONNECTOR_LVDS;
sdvo_priv->is_lvds = true;
}
else
{