[Intel-gfx] [PATCH] drm/i915: Add PLANE_CUS_CTL restriction in max_width

[Vidya Srinivas]

PLANE_CUS_CTL has a restriction of 4096 width even though
PLANE_SIZE and scaler size registers supports max 5120.
Take care of this restriction in max_width.

Without this patch, when 5k content is sent on HDR plane
with NV12 content, FIFO underrun is seen and screen blanks
out.

Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
Signed-off-by: Yashashvi Shantam <shantam.yashashvi at intel.com>
Change-Id: If629c478ba044c8bde633de9f0fc638aa6c44233
---
 .../gpu/drm/i915/display/intel_display_types.h  |  3 ++-
 .../gpu/drm/i915/display/skl_universal_plane.c  | 17 +++++++++++++----
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index ea1e8a6e10b0..0455ea340329 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1358,7 +1358,8 @@ struct intel_plane {
 	int (*min_width)(const struct drm_framebuffer *fb,
 			 int color_plane,
 			 unsigned int rotation);
-	int (*max_width)(const struct drm_framebuffer *fb,
+	int (*max_width)(struct intel_plane *plane,
+			 const struct drm_framebuffer *fb,
 			 int color_plane,
 			 unsigned int rotation);
 	int (*max_height)(const struct drm_framebuffer *fb,
diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index 28890876bdeb..a49829c5a863 100644
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -313,7 +313,8 @@ static int skl_plane_min_cdclk(const struct intel_crtc_state *crtc_state,
 	return DIV_ROUND_UP(pixel_rate * num, den);
 }
 
-static int skl_plane_max_width(const struct drm_framebuffer *fb,
+static int skl_plane_max_width(struct intel_plane *plane,
+				const struct drm_framebuffer *fb,
 			       int color_plane,
 			       unsigned int rotation)
 {
@@ -352,7 +353,8 @@ static int skl_plane_max_width(const struct drm_framebuffer *fb,
 	}
 }
 
-static int glk_plane_max_width(const struct drm_framebuffer *fb,
+static int glk_plane_max_width(struct intel_plane *plane,
+				const struct drm_framebuffer *fb,
 			       int color_plane,
 			       unsigned int rotation)
 {
@@ -420,10 +422,17 @@ static int icl_plane_min_width(const struct drm_framebuffer *fb,
 	}
 }
 
-static int icl_plane_max_width(const struct drm_framebuffer *fb,
+static int icl_plane_max_width(struct intel_plane *plane,
+				const struct drm_framebuffer *fb,
 			       int color_plane,
 			       unsigned int rotation)
 {
+	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
+
+	if (icl_is_hdr_plane(dev_priv, plane->id) &&
+	    intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
+		return 4096;
+
 	return 5120;
 }
 
@@ -1377,7 +1386,7 @@ static int intel_plane_max_width(struct intel_plane *plane,
 				 unsigned int rotation)
 {
 	if (plane->max_width)
-		return plane->max_width(fb, color_plane, rotation);
+		return plane->max_width(plane, fb, color_plane, rotation);
 	else
 		return INT_MAX;
 }
-- 
2.33.0