diff options
| author |   Ville Syrjälä <ville.syrjala@linux.intel.com> | 2016-05-18 11:34:38 +0300 |
|---|---|---|
| committer |   Dave Airlie <airlied@redhat.com> | 2016-08-03 07:06:41 +1000 |
| commit | dfd2e9ab6a7db56a5f5bb55f71485a92613c8e11 (patch) | |
| tree | 968afed7882d42d34c35f96ae1d7fb25aefc2451 /drivers/gpu/drm/i915/intel_sprite.c | |
| parent | drm/dp: Add drm_dp_psr_setup_time() (diff) | |
| download | linux-dev-dfd2e9ab6a7db56a5f5bb55f71485a92613c8e11.tar.xz linux-dev-dfd2e9ab6a7db56a5f5bb55f71485a92613c8e11.zip | |
drm/i915: Check PSR setup time vs. vblank length
Bspec says:
"Restriction : SRD must not be enabled when the PSR Setup time from DPCD
00071h is greater than the time for vertical blank minus one line."
Let's check for that and disallow PSR if we exceed the limit.
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_sprite.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index 0de935ad01c2..7c08e4f29032 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -53,8 +53,8 @@ format_is_yuv(uint32_t format) } } -static int usecs_to_scanlines(const struct drm_display_mode *adjusted_mode, - int usecs) +int intel_usecs_to_scanlines(const struct drm_display_mode *adjusted_mode, + int usecs) { /* paranoia */ if (!adjusted_mode->crtc_htotal) @@ -91,7 +91,7 @@ void intel_pipe_update_start(struct intel_crtc *crtc) vblank_start = DIV_ROUND_UP(vblank_start, 2); /* FIXME needs to be calibrated sensibly */ - min = vblank_start - usecs_to_scanlines(adjusted_mode, 100); + min = vblank_start - intel_usecs_to_scanlines(adjusted_mode, 100); max = vblank_start - 1; local_irq_disable(); |