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drm/i915: Cache LVDS EDID

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We assume that the panel is permenantly connected and that the EDID data
is consistent from boot, so simply cache the whole EDID for the panel.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-09-16 23:05:10 +01:00
commit 219adae138
1 changed files with 8 additions and 11 deletions
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19
drivers/gpu/drm/i915/intel_lvds.c
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@ -44,7 +44,7 @@
struct intel_lvds {
struct intel_encoder base;
bool edid_good;
struct edid *edid;
int fitting_mode;
u32 pfit_control;
@ -475,14 +475,12 @@ static int intel_lvds_get_modes(struct drm_connector *connector)
{
struct intel_lvds *intel_lvds = intel_attached_lvds(connector);
struct drm_device *dev = connector->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_display_mode *mode;
if (intel_lvds->edid_good) {
int ret = intel_ddc_get_modes(connector,
&dev_priv->gmbus[GMBUS_PORT_PANEL].adapter);
if (ret)
return ret;
if (intel_lvds->edid) {
drm_mode_connector_update_edid_property(connector,
intel_lvds->edid);
return drm_add_edid_modes(connector, intel_lvds->edid);
}
mode = drm_mode_duplicate(dev, intel_lvds->fixed_mode);
@ -906,11 +904,10 @@ 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_lvds->edid_good = true;
if (!intel_ddc_get_modes(connector, &dev_priv->gmbus[GMBUS_PORT_PANEL].adapter))
intel_lvds->edid_good = false;
intel_lvds->edid = drm_get_edid(connector,
&dev_priv->gmbus[GMBUS_PORT_PANEL].adapter);
if (!intel_lvds->edid_good) {
if (!intel_lvds->edid) {
/* Didn't get an EDID, so
* Set wide sync ranges so we get all modes
* handed to valid_mode for checking