[11/15] drm/framebuffer: Format modifier for Intel Gen-12 media compression
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Message ID 20191220104931.12135-4-imre.deak@intel.com
State New
Headers show
  • [01/15] drm/framebuffer: Format modifier for Intel Gen-12 render compression
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Commit Message

Imre Deak Dec. 20, 2019, 10:49 a.m. UTC
From: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>

Gen-12 display can decompress surfaces compressed by the media engine, add
a new modifier as the driver needs to know the surface was compressed by
the media or render engine.

v2: Update code comment describing the color plane order for YUV
    semiplanar formats.

Cc: Nanley G Chery <nanley.g.chery@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
 include/uapi/drm/drm_fourcc.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

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diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index 5ba481f49931..8bc0b31597d8 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -421,6 +421,19 @@  extern "C" {
 #define I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS fourcc_mod_code(INTEL, 6)
+ * Intel color control surfaces (CCS) for Gen-12 media compression
+ *
+ * The main surface is Y-tiled and at plane index 0, the CCS is linear and
+ * at index 1. A 64B CCS cache line corresponds to an area of 4x1 tiles in
+ * main surface. In other words, 4 bits in CCS map to a main surface cache
+ * line pair. The main surface pitch is required to be a multiple of four
+ * Y-tile widths. For semi-planar formats like NV12, CCS planes follow the
+ * Y and UV planes i.e., planes 0 and 1 are used for Y and UV surfaces,
+ * planes 2 and 3 for the respective CCS.
+ */
+#define I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS fourcc_mod_code(INTEL, 7)
  * Tiled, NV12MT, grouped in 64 (pixels) x 32 (lines) -sized macroblocks