[Intel-gfx] [PATCH 1/6] drm/framebuffer/tgl: Format modifier for Intel Gen-12 render compression

[Radhakrishna Sripada]

From: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>

Gen-12 has a new compression format, add a new modifier for userspace to
indicate that.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 include/uapi/drm/drm_fourcc.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 3feeaa3f987a..fb7270bf9670 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -410,6 +410,16 @@ extern "C" {
 #define I915_FORMAT_MOD_Y_TILED_CCS	fourcc_mod_code(INTEL, 4)
 #define I915_FORMAT_MOD_Yf_TILED_CCS	fourcc_mod_code(INTEL, 5)
 
+/*
+ * Intel color control surfaces (CCS) for Gen-12 render compression.
+ *
+ * The main surface is Y-tiled and is at plane index 0 whereas CCS is linear and
+ * at index 1. A CCS cache line corresponds to an area of 4x1 tiles in the main
+ * surface. The main surface pitch is required to be a multiple of 4 tile
+ * widths.
+ */
+#define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS fourcc_mod_code(INTEL, 6)
+
 /*
  * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks
  *
-- 
2.20.1