drm/i915/display: Acomodate format check in intel_plane_can_async_flip()

The function intel_plane_can_async_flip() checks for async supported
modifier, add format support check also in the same function.

Note: on ADL the surface base addr is required to be 16k aligned and if
not might generate DMAR and GGTT faults leading to glitches. This patch
changes the 16k alignment to 4k for planar formats.

v11: Move filtering Indexed 8bit to a separate patch (Ville)
v12: correct the commit msg and remove unwanted debug print (Ville)

Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://lore.kernel.org/r/20250407-asyn-v13-3-b93ef83076c5@intel.com

Author: armurthy

drivers/gpu/drm/i915/display/i9xx_plane.c

@@ -828,7 +828,7 @@ unsigned int vlv_plane_min_alignment(struct intel_plane *plane,
 {
 	struct intel_display *display = to_intel_display(plane);
 
-	if (intel_plane_can_async_flip(plane, fb->modifier))
+	if (intel_plane_can_async_flip(plane, fb->format->format, fb->modifier))
 		return 256 * 1024;
 
 	/* FIXME undocumented so not sure what's actually needed */
@@ -852,7 +852,7 @@ static unsigned int g4x_primary_min_alignment(struct intel_plane *plane,
 {
 	struct intel_display *display = to_intel_display(plane);
 
-	if (intel_plane_can_async_flip(plane, fb->modifier))
+	if (intel_plane_can_async_flip(plane, fb->format->format, fb->modifier))
 		return 256 * 1024;
 
 	if (intel_scanout_needs_vtd_wa(display))

drivers/gpu/drm/i915/display/intel_atomic_plane.c

@@ -174,8 +174,12 @@ bool intel_plane_needs_physical(struct intel_plane *plane)
 		DISPLAY_INFO(display)->cursor_needs_physical;
 }
 
-bool intel_plane_can_async_flip(struct intel_plane *plane, u64 modifier)
+bool intel_plane_can_async_flip(struct intel_plane *plane, u32 format,
+				u64 modifier)
 {
+	if (intel_format_info_is_yuv_semiplanar(drm_format_info(format), modifier))
+		return false;
+
 	return plane->can_async_flip && plane->can_async_flip(modifier);
 }
 

drivers/gpu/drm/i915/display/intel_atomic_plane.h

@@ -21,7 +21,8 @@ enum plane_id;
 
 struct intel_plane *
 intel_crtc_get_plane(struct intel_crtc *crtc, enum plane_id plane_id);
-bool intel_plane_can_async_flip(struct intel_plane *plane, u64 modifier);
+bool intel_plane_can_async_flip(struct intel_plane *plane, u32 format,
+				u64 modifier);
 unsigned int intel_adjusted_rate(const struct drm_rect *src,
 				 const struct drm_rect *dst,
 				 unsigned int rate);

drivers/gpu/drm/i915/display/intel_display.c

@@ -6021,22 +6021,16 @@ static int intel_async_flip_check_hw(struct intel_atomic_state *state, struct in
 		if (!plane->async_flip)
 			continue;
 
-		if (!intel_plane_can_async_flip(plane, new_plane_state->hw.fb->modifier)) {
+		if (!intel_plane_can_async_flip(plane, new_plane_state->hw.fb->format->format,
+						new_plane_state->hw.fb->modifier)) {
 			drm_dbg_kms(display->drm,
-				    "[PLANE:%d:%s] Modifier 0x%llx does not support async flip\n",
+				    "[PLANE:%d:%s] pixel format %p4cc / modifier 0x%llx does not support async flip\n",
 				    plane->base.base.id, plane->base.name,
+				    &new_plane_state->hw.fb->format->format,
 				    new_plane_state->hw.fb->modifier);
 			return -EINVAL;
 		}
 
-		if (intel_format_info_is_yuv_semiplanar(new_plane_state->hw.fb->format,
-							new_plane_state->hw.fb->modifier)) {
-			drm_dbg_kms(display->drm,
-				    "[PLANE:%d:%s] Planar formats do not support async flips\n",
-				    plane->base.base.id, plane->base.name);
-			return -EINVAL;
-		}
-
 		/*
 		 * We turn the first async flip request into a sync flip
 		 * so that we can reconfigure the plane (eg. change modifier).

drivers/gpu/drm/i915/display/skl_universal_plane.c

@@ -601,7 +601,7 @@ static u32 tgl_plane_min_alignment(struct intel_plane *plane,
 	 * Figure out what's going on here...
 	 */
 	if (display->platform.alderlake_p &&
-	    intel_plane_can_async_flip(plane, fb->modifier))
+	    intel_plane_can_async_flip(plane, fb->format->format, fb->modifier))
 		return mult * 16 * 1024;
 
 	switch (fb->modifier) {