[PATCH v20 18/18] drm/i915: Do not do fb src adjustments for NV12

[Vidya Srinivas]

We skip src trunction/adjustments for
NV12 case and handle the sizes directly.
Without this, pipe fifo underruns are seen on APL/KBL.

Credits-to: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
---
 drivers/gpu/drm/i915/intel_sprite.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index d5dad44..d290731 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -969,6 +969,9 @@ intel_check_sprite_plane(struct intel_plane *plane,
 		return -EINVAL;
 	}
 
+	if (fb->format->format == DRM_FORMAT_NV12)
+		goto check_plane_surface;
+
 	/* setup can_scale, min_scale, max_scale */
 	if (INTEL_GEN(dev_priv) >= 9) {
 		if (state->base.fb)
@@ -1112,6 +1115,7 @@ intel_check_sprite_plane(struct intel_plane *plane,
 	dst->y1 = crtc_y;
 	dst->y2 = crtc_y + crtc_h;
 
+check_plane_surface:
 	if (INTEL_GEN(dev_priv) >= 9) {
 		ret = skl_check_plane_surface(crtc_state, state);
 		if (ret)
-- 
2.7.4