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drm/i915: Clear pfit registers when not used by any outputs 

... otherwise the panel-fitter may be left enabled with random settings
and cause unintended filtering (i.e. blurring of native modes on external
panels).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=31942
Reported-and-tested-by: Ben Kohler <bkohler@gmail.com>
Tested-by: Ciprian Docan <docan@eden.rutgers.edu>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-11-29 18:00:23 +00:00
parent de18a29e0f
commit c5d1b51d35
3 changed files with 17 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/intel_display.c
View File

@ -5336,9 +5336,14 @@ static void intel_setup_outputs(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_encoder *encoder;
bool dpd_is_edp = false;
bool has_lvds = false;
if (IS_MOBILE(dev) && !IS_I830(dev))
intel_lvds_init(dev);
has_lvds = intel_lvds_init(dev);
if (!has_lvds && !HAS_PCH_SPLIT(dev)) {
/* disable the panel fitter on everything but LVDS */
I915_WRITE(PFIT_CONTROL, 0);
}
if (HAS_PCH_SPLIT(dev)) {
dpd_is_edp = intel_dpd_is_edp(dev);

2
drivers/gpu/drm/i915/intel_drv.h
View File

@ -237,7 +237,7 @@ extern bool intel_sdvo_init(struct drm_device *dev, int output_device);
extern void intel_dvo_init(struct drm_device *dev);
extern void intel_tv_init(struct drm_device *dev);
extern void intel_mark_busy(struct drm_device *dev, struct drm_gem_object *obj);
extern void intel_lvds_init(struct drm_device *dev);
extern bool intel_lvds_init(struct drm_device *dev);
extern void intel_dp_init(struct drm_device *dev, int dp_reg);
void
intel_dp_set_m_n(struct drm_crtc *crtc, struct drm_display_mode *mode,

19
drivers/gpu/drm/i915/intel_lvds.c
View File

@ -837,7 +837,7 @@ static bool intel_lvds_ddc_probe(struct drm_device *dev, u8 pin)
* Create the connector, register the LVDS DDC bus, and try to figure out what
* modes we can display on the LVDS panel (if present).
*/
void intel_lvds_init(struct drm_device *dev)
bool intel_lvds_init(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_lvds *intel_lvds;
@ -853,37 +853,37 @@ void intel_lvds_init(struct drm_device *dev)
/* Skip init on machines we know falsely report LVDS */
if (dmi_check_system(intel_no_lvds))
return;
return false;
pin = GMBUS_PORT_PANEL;
if (!lvds_is_present_in_vbt(dev, &pin)) {
DRM_DEBUG_KMS("LVDS is not present in VBT\n");
return;
return false;
}
if (HAS_PCH_SPLIT(dev)) {
if ((I915_READ(PCH_LVDS) & LVDS_DETECTED) == 0)
return;
return false;
if (dev_priv->edp.support) {
DRM_DEBUG_KMS("disable LVDS for eDP support\n");
return;
return false;
}
}
if (!intel_lvds_ddc_probe(dev, pin)) {
DRM_DEBUG_KMS("LVDS did not respond to DDC probe\n");
return;
return false;
}
intel_lvds = kzalloc(sizeof(struct intel_lvds), GFP_KERNEL);
if (!intel_lvds) {
return;
return false;
}
intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
if (!intel_connector) {
kfree(intel_lvds);
return;
return false;
}
if (!HAS_PCH_SPLIT(dev)) {
@ -1026,7 +1026,7 @@ out:
/* keep the LVDS connector */
dev_priv->int_lvds_connector = connector;
drm_sysfs_connector_add(connector);
return;
return true;
failed:
DRM_DEBUG_KMS("No LVDS modes found, disabling.\n");
@ -1034,4 +1034,5 @@ failed:
drm_encoder_cleanup(encoder);
kfree(intel_lvds);
kfree(intel_connector);
return false;
}