diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2012-05-24 21:08:59 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-07-05 13:29:45 +0200 |
| commit | e6a595d2db7ad403fcb2b7b168754d7551fc8c9b (patch) | |
| tree | 0925ca05d909924b30d4888d4e06b9db4989ba1f /drivers | |
| parent | 3a7f2f6a9e43f2c5ce45d4ca19c43bf61df3f0dd (diff) | |
drm/i915: Reject page flips with changed format/offset/pitch
MI display flips can't handle some changes in the framebuffer
format or layout. Return an error in such cases.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 4d84fcdd413..7e31f7af0de 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -6438,6 +6438,19 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, unsigned long flags; int ret; + /* Can't change pixel format via MI display flips. */ + if (fb->pixel_format != crtc->fb->pixel_format) + return -EINVAL; + + /* + * TILEOFF/LINOFF registers can't be changed via MI display flips. + * Note that pitch changes could also affect these register. + */ + if (INTEL_INFO(dev)->gen > 3 && + (fb->offsets[0] != crtc->fb->offsets[0] || + fb->pitches[0] != crtc->fb->pitches[0])) + return -EINVAL; + work = kzalloc(sizeof *work, GFP_KERNEL); if (work == NULL) return -ENOMEM; |