[Intel-gfx] [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 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index d5dad44..68a4344 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -261,6 +261,8 @@ skl_update_plane(struct intel_plane *plane,
 	crtc_w--;
 	crtc_h--;
 
+	DRM_ERROR("%x, %d %d %d %d\n", fb->format->format, src_w, src_h, crtc_w, crtc_h);
+
 	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);
 
 	if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
@@ -1015,6 +1017,9 @@ intel_check_sprite_plane(struct intel_plane *plane,
 	crtc_w = drm_rect_width(dst);
 	crtc_h = drm_rect_height(dst);
 
+	if (fb->format->format == DRM_FORMAT_NV12)
+		goto check_plane_surface;
+
 	if (state->base.visible) {
 		/* check again in case clipping clamped the results */
 		hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
@@ -1112,6 +1117,7 @@ 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