drm/dsc: Define Rate Control values that do not change over configurations

DSC has some Rate Control values that remain constant
across all configurations. These are as per the DSC
standard.

v3:
* Define them in drm_dsc.h as they are
DSC constants (Manasi)
v2:
* Add DP_DSC_ prefix (Jani Nikula)

Cc: dri-devel@lists.freedesktop.org
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Gaurav K Singh <gaurav.k.singh@intel.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Srivatsa, Anusha <anusha.srivatsa@intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Acked-by: Sean Paul <seanpaul@chromium.org> (For merging through
drm-intel)
Link: https://patchwork.freedesktop.org/patch/msgid/20181127214125.17658-4-manasi.d.navare@intel.com

diff --git a/include/drm/drm_dsc.h b/include/drm/drm_dsc.h
index 3292dfed9d0a4c6f266b0e1171647669bd895e4c..b88e31bd9da778c8453917114ce0bcf4450bba08 100644 (file)
--- a/include/drm/drm_dsc.h
+++ b/include/drm/drm_dsc.h
@@ -18,6 +18,12 @@
 #define DSC_SCALE_DECREMENT_INTERVAL_MAX       4095
 #define DSC_RANGE_BPG_OFFSET_MASK              0x3f
 
+/* DSC Rate Control Constants */
+#define DSC_RC_MODEL_SIZE_CONST                    8192
+#define DSC_RC_EDGE_FACTOR_CONST           6
+#define DSC_RC_TGT_OFFSET_HI_CONST         3
+#define DSC_RC_TGT_OFFSET_LO_CONST         3
+
 /* Configuration for a single Rate Control model range */
 struct drm_dsc_rc_range_parameters {
        /* Min Quantization Parameters allowed for this range */