[Intel-gfx] [PATCH 2/2] drm/i915: Reuse plane format modifier checks to verify addfb() arguments

[Dhinakaran Pandiyan]

Currently there is some duplication of pixel format and modifier
validation code between the fb creation and plane check paths. We can
unify them by checking if any plane supports a pixel format and modifier
combination during framebuffer creation.

Suggested-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 116 ++++++-----------------------------
 1 file changed, 19 insertions(+), 97 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index fe045abb6472..1b5d936a93d0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14362,6 +14362,19 @@ u32 intel_fb_pitch_limit(struct drm_i915_private *dev_priv,
 				 DRM_MODE_ROTATE_0);
 }
 
+static bool any_plane_supports_format(struct drm_i915_private *dev_priv,
+					     uint64_t fb_modifier,
+					     uint32_t pixel_format)
+{
+	struct drm_plane *plane;
+
+	drm_for_each_plane(plane, &dev_priv->drm)
+		if (!drm_plane_check_pixel_format(plane, pixel_format,
+						  fb_modifier))
+			return true;
+	return false;
+}
+
 static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 				  struct drm_i915_gem_object *obj,
 				  struct drm_mode_fb_cmd2 *mode_cmd)
@@ -14399,40 +14412,12 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 		}
 	}
 
-	/* Passed in modifier sanity checking. */
-	switch (mode_cmd->modifier[0]) {
-	case I915_FORMAT_MOD_Y_TILED_CCS:
-	case I915_FORMAT_MOD_Yf_TILED_CCS:
-		switch (mode_cmd->pixel_format) {
-		case DRM_FORMAT_XBGR8888:
-		case DRM_FORMAT_ABGR8888:
-		case DRM_FORMAT_XRGB8888:
-		case DRM_FORMAT_ARGB8888:
-			break;
-		default:
-			DRM_DEBUG_KMS("RC supported only with RGB8888 formats\n");
-			goto err;
-		}
-		/* fall through */
-	case I915_FORMAT_MOD_Yf_TILED:
-		if (mode_cmd->pixel_format == DRM_FORMAT_C8) {
-			DRM_DEBUG_KMS("Indexed format does not support Yf tiling\n");
-			goto err;
-		}
-		/* fall through */
-	case I915_FORMAT_MOD_Y_TILED:
-		if (INTEL_GEN(dev_priv) < 9) {
-			DRM_DEBUG_KMS("Unsupported tiling 0x%llx!\n",
-				      mode_cmd->modifier[0]);
-			goto err;
-		}
-		break;
-	case DRM_FORMAT_MOD_LINEAR:
-	case I915_FORMAT_MOD_X_TILED:
-		break;
-	default:
-		DRM_DEBUG_KMS("Unsupported fb modifier 0x%llx!\n",
-			      mode_cmd->modifier[0]);
+	if (!any_plane_supports_format(dev_priv, mode_cmd->modifier[0],
+				       mode_cmd->pixel_format)) {
+		DRM_DEBUG_KMS("Unsupported pixel format %s or modifier 0x%llx\n",
+			       drm_get_format_name(mode_cmd->pixel_format,
+						   &format_name),
+			       mode_cmd->modifier[0]);
 		goto err;
 	}
 
@@ -14466,69 +14451,6 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 		goto err;
 	}
 
-	/* Reject formats not supported by any plane early. */
-	switch (mode_cmd->pixel_format) {
-	case DRM_FORMAT_C8:
-	case DRM_FORMAT_RGB565:
-	case DRM_FORMAT_XRGB8888:
-	case DRM_FORMAT_ARGB8888:
-		break;
-	case DRM_FORMAT_XRGB1555:
-		if (INTEL_GEN(dev_priv) > 3) {
-			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
-				      drm_get_format_name(mode_cmd->pixel_format, &format_name));
-			goto err;
-		}
-		break;
-	case DRM_FORMAT_ABGR8888:
-		if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
-		    INTEL_GEN(dev_priv) < 9) {
-			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
-				      drm_get_format_name(mode_cmd->pixel_format, &format_name));
-			goto err;
-		}
-		break;
-	case DRM_FORMAT_XBGR8888:
-	case DRM_FORMAT_XRGB2101010:
-	case DRM_FORMAT_XBGR2101010:
-		if (INTEL_GEN(dev_priv) < 4) {
-			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
-				      drm_get_format_name(mode_cmd->pixel_format, &format_name));
-			goto err;
-		}
-		break;
-	case DRM_FORMAT_ABGR2101010:
-		if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv)) {
-			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
-				      drm_get_format_name(mode_cmd->pixel_format, &format_name));
-			goto err;
-		}
-		break;
-	case DRM_FORMAT_YUYV:
-	case DRM_FORMAT_UYVY:
-	case DRM_FORMAT_YVYU:
-	case DRM_FORMAT_VYUY:
-		if (INTEL_GEN(dev_priv) < 5 && !IS_G4X(dev_priv)) {
-			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
-				      drm_get_format_name(mode_cmd->pixel_format, &format_name));
-			goto err;
-		}
-		break;
-	case DRM_FORMAT_NV12:
-		if (INTEL_GEN(dev_priv) < 9 || IS_SKYLAKE(dev_priv) ||
-		    IS_BROXTON(dev_priv)) {
-			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
-				      drm_get_format_name(mode_cmd->pixel_format,
-							  &format_name));
-			goto err;
-		}
-		break;
-	default:
-		DRM_DEBUG_KMS("unsupported pixel format: %s\n",
-			      drm_get_format_name(mode_cmd->pixel_format, &format_name));
-		goto err;
-	}
-
 	/* FIXME need to adjust LINOFF/TILEOFF accordingly. */
 	if (mode_cmd->offsets[0] != 0)
 		goto err;
-- 
2.14.1