drm/i915: Add CCS capability for sprites

Allow sprites to scan out compressed framebuffers.

Since different platforms have a different set of planes that
support CCS let's add a small helper to determine whether a
specific plane supports CCS or not. Currently that information
is spread around in many places, and not all the pieces of
code even agree with each other.

In addition to allowing sprites to scan out compressed fbs,
the other fix here is that we stop rejecting them on pipe C
on CNL.

Cc: Ben Widawsky <ben@bwidawsk.net>
Cc: Jason Ekstrand <jason@jlekstrand.net>
Cc: Daniel Stone <daniels@collabora.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171222192231.17981-6-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>

1 files changed, 37 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index 349be8134c76..cb06acff283d 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -1161,7 +1161,17 @@ static uint32_t skl_plane_formats[] = {
 	DRM_FORMAT_VYUY,
 };
 
-static const uint64_t skl_plane_format_modifiers[] = {
+static const uint64_t skl_plane_format_modifiers_noccs[] = {
+	I915_FORMAT_MOD_Yf_TILED,
+	I915_FORMAT_MOD_Y_TILED,
+	I915_FORMAT_MOD_X_TILED,
+	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_INVALID
+};
+
+static const uint64_t skl_plane_format_modifiers_ccs[] = {
+	I915_FORMAT_MOD_Yf_TILED_CCS,
+	I915_FORMAT_MOD_Y_TILED_CCS,
 	I915_FORMAT_MOD_Yf_TILED,
 	I915_FORMAT_MOD_Y_TILED,
 	I915_FORMAT_MOD_X_TILED,
@@ -1234,6 +1244,10 @@ static bool skl_mod_supported(uint32_t format, uint64_t modifier)
 	case DRM_FORMAT_XBGR8888:
 	case DRM_FORMAT_ARGB8888:
 	case DRM_FORMAT_ABGR8888:
+		if (modifier == I915_FORMAT_MOD_Yf_TILED_CCS ||
+		    modifier == I915_FORMAT_MOD_Y_TILED_CCS)
+			return true;
+		/* fall through */
 	case DRM_FORMAT_RGB565:
 	case DRM_FORMAT_XRGB2101010:
 	case DRM_FORMAT_XBGR2101010:
@@ -1289,6 +1303,23 @@ static const struct drm_plane_funcs intel_sprite_plane_funcs = {
         .format_mod_supported = intel_sprite_plane_format_mod_supported,
 };
 
+bool skl_plane_has_ccs(struct drm_i915_private *dev_priv,
+		       enum pipe pipe, enum plane_id plane_id)
+{
+	if (plane_id == PLANE_CURSOR)
+		return false;
+
+	if (INTEL_GEN(dev_priv) >= 10)
+		return true;
+
+	if (IS_GEMINILAKE(dev_priv))
+		return pipe != PIPE_C;
+
+	return pipe != PIPE_C &&
+		(plane_id == PLANE_PRIMARY ||
+		 plane_id == PLANE_SPRITE0);
+}
+
 struct intel_plane *
 intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 			  enum pipe pipe, int plane)
@@ -1315,7 +1346,7 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 	}
 	intel_plane->base.state = &state->base;
 
-	if (INTEL_GEN(dev_priv) >= 10) {
+	if (INTEL_GEN(dev_priv) >= 9) {
 		intel_plane->can_scale = true;
 		state->scaler_id = -1;
 
@@ -1325,18 +1356,11 @@ intel_sprite_plane_create(struct drm_i915_private *dev_priv,
 
 		plane_formats = skl_plane_formats;
 		num_plane_formats = ARRAY_SIZE(skl_plane_formats);
-		modifiers = skl_plane_format_modifiers;
-	} else if (INTEL_GEN(dev_priv) >= 9) {
-		intel_plane->can_scale = true;
-		state->scaler_id = -1;
 
-		intel_plane->update_plane = skl_update_plane;
-		intel_plane->disable_plane = skl_disable_plane;
-		intel_plane->get_hw_state = skl_plane_get_hw_state;
-
-		plane_formats = skl_plane_formats;
-		num_plane_formats = ARRAY_SIZE(skl_plane_formats);
-		modifiers = skl_plane_format_modifiers;
+		if (skl_plane_has_ccs(dev_priv, pipe, PLANE_SPRITE0 + plane))
+			modifiers = skl_plane_format_modifiers_ccs;
+		else
+			modifiers = skl_plane_format_modifiers_noccs;
 	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
 		intel_plane->can_scale = false;
 		intel_plane->max_downscale = 1;