diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2014-08-27 17:48:41 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-09-03 11:04:45 +0200 |
| commit | c9ba6fad426faa8349523cef323f7b4b7d17a1e8 (patch) | |
| tree | 2bc0698a773bd370ef048b7d1aad55fd9b4e2771 /drivers/gpu/drm/i915/intel_display.c | |
| parent | 888b59951ed5ac450fe3ddd7b3937d905b9bafbc (diff) | |
drm/i915: Don't dereference fb when disabling primary plane
During driver init we may not have a valid framebuffer for the primary
plane even though the plane is enabled due to failed BIOS fb takeover.
This means we have to avoid dereferencing the fb in
.update_primary_plane() when disabling the plane.
The introduction of the primary plane rotation in
commit d91a2cb8e5104233c02bbde539bd4ee455ec12ac
Author: Sonika Jindal <sonika.jindal@intel.com>
Date: Fri Aug 22 14:06:04 2014 +0530
drm/i915: Add 180 degree primary plane rotation support
caused a regression by trying to look up the pixel format before we can
be sure there's a valid fb available. This isn't entirely unsurprising
since the rotation patches originally predate the change to the primary
plane code that calls .update_primary_plane() also when disabling the
plane:
commit fdd508a6419217cce28213f3c9bd27c02a0d4c71
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Fri Aug 8 21:51:11 2014 +0300
drm/i915: Call .update_primary_plane in intel_{enable,
disable}_primary_hw_plane()
v2: Warn but don't blow up when trying to enable a plane w/o an fb (Chris)
Cc: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index cbd159163722..c95d423e10bb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -2388,15 +2388,13 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc, struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - struct drm_i915_gem_object *obj = intel_fb_obj(fb); + struct drm_i915_gem_object *obj; int plane = intel_crtc->plane; unsigned long linear_offset; u32 dspcntr; u32 reg = DSPCNTR(plane); int pixel_size; - pixel_size = drm_format_plane_cpp(fb->pixel_format, 0); - if (!intel_crtc->primary_enabled) { I915_WRITE(reg, 0); if (INTEL_INFO(dev)->gen >= 4) @@ -2407,6 +2405,12 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc, return; } + obj = intel_fb_obj(fb); + if (WARN_ON(obj == NULL)) + return; + + pixel_size = drm_format_plane_cpp(fb->pixel_format, 0); + dspcntr = DISPPLANE_GAMMA_ENABLE; dspcntr |= DISPLAY_PLANE_ENABLE; @@ -2510,15 +2514,13 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc, struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - struct drm_i915_gem_object *obj = intel_fb_obj(fb); + struct drm_i915_gem_object *obj; int plane = intel_crtc->plane; unsigned long linear_offset; u32 dspcntr; u32 reg = DSPCNTR(plane); int pixel_size; - pixel_size = drm_format_plane_cpp(fb->pixel_format, 0); - if (!intel_crtc->primary_enabled) { I915_WRITE(reg, 0); I915_WRITE(DSPSURF(plane), 0); @@ -2526,6 +2528,12 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc, return; } + obj = intel_fb_obj(fb); + if (WARN_ON(obj == NULL)) + return; + + pixel_size = drm_format_plane_cpp(fb->pixel_format, 0); + dspcntr = DISPPLANE_GAMMA_ENABLE; dspcntr |= DISPLAY_PLANE_ENABLE; |