Starting from Gen12 Async Flip is supported on linear buffers.
This patch enables support for async on linear buffer.
UseCase: In Hybrid graphics, for hardware unsupported pixel formats it
will be converted to linear memory and then composed.
v2: Added use case
v3: Added FIXME for ICL indicating the restrictions
Signed-off-by: Arun R Murthy <arun.r.murthy@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index be7cff722196..1880cfe70a7d 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -6610,6 +6610,20 @@ static int intel_async_flip_check_hw(struct intel_atomic_state *state, struct in
* this selectively if required.
*/
switch (new_plane_state->hw.fb->modifier) {
+ case DRM_FORMAT_MOD_LINEAR:
+ /*
+ * FIXME: Async on Linear buffer is supported on ICL as
+ * but with additional alignment and fbc restrictions
+ * need to be taken care of. These aren't applicable for
+ * gen12+.
+ */
+ if (DISPLAY_VER(i915) < 12) {
+ drm_dbg_kms(&i915->drm,
+ "[PLANE:%d:%s] Modifier does not support async flips\n",
+ plane->base.base.id, plane->base.name);
+ return -EINVAL;
+ }
+
case I915_FORMAT_MOD_X_TILED:
case I915_FORMAT_MOD_Y_TILED:
case I915_FORMAT_MOD_Yf_TILED:
--
2.25.1
