diff options
Diffstat (limited to 'drivers/gpu')
| -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 4d84fcdd413f..7e31f7af0de8 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; |