[PATCH 3/4] drm/dp: Add max bpp delta computation constants

[Nemesa Garg <nemesa.garg@intel.com>]

Define macros used for decoding DSC max bpp delta values
from the sink DPCD. This includes per-format masks for
RGB/YCbCr444 and YCbCr420, as well as definitions for delta
scaling and the YCbCr420 bit shift. Also add version_1 as
suffix to MAX_DELTA_BPP.

v2: Move constants under 0x6E register. [Ankit]
    Add mask for Native 422 also. [Ankit]
v3: Rename _DSC_NATIVE4222 to _DSC_NATIVE_YCbCr422. [Ankit]

Signed-off-by: Nemesa Garg <nemesa.garg@intel.com>
---
 include/drm/display/drm_dp.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/drm/display/drm_dp.h b/include/drm/display/drm_dp.h
index dce290acf735..a905aa49d1d0 100644
--- a/include/drm/display/drm_dp.h
+++ b/include/drm/display/drm_dp.h
@@ -354,10 +354,14 @@
 # define DP_DSC_20_PER_DP_DSC_SINK          (1 << 1)
 # define DP_DSC_24_PER_DP_DSC_SINK          (1 << 2)
 
-#define DP_DSC_MAX_BPP_DELTA		    0x06E
+#define DP_DSC_MAX_BPP_DELTA_VERSION_1		0x06E
 # define DP_DSC_RGB_YCbCr444_MAX_BPP_DELTA_MASK 0x1f
 # define DP_DSC_NATIVE_YCbCr420_MAX_BPP_DELTA_MASK 0xe0
 
+# define DP_DSC_BPP_DELTA_444			16
+# define DP_DSC_BPP_DELTA_420			12
+# define DP_DSC_BPP_DELTA_SHIFT_420		5
+
 #define DP_DSC_BITS_PER_PIXEL_INC           0x06F
 # define DP_DSC_BITS_PER_PIXEL_1_16         0x0
 # define DP_DSC_BITS_PER_PIXEL_1_8          0x1
@@ -365,6 +369,8 @@
 # define DP_DSC_BITS_PER_PIXEL_1_2          0x3
 # define DP_DSC_BITS_PER_PIXEL_1_1          0x4
 # define DP_DSC_BITS_PER_PIXEL_MASK         0x7
+# define DP_DSC_NATIVE_YCbCr422_MAX_BPP_DELTA_MASK  0x78
+# define DP_DSC_BPP_DELTA_NATIVE_422		16
 
 #define DP_PSR_SUPPORT                      0x070   /* XXX 1.2? */
 # define DP_PSR_IS_SUPPORTED                1
-- 
2.25.1