Add helpers to calculate det_thresh_flatness and initial_scale_value as
these calculations are defined within the DSC spec.
Changes in v2:
- Renamed det_thresh_flatness to flatness_det_thresh
- Set initial_scale_value directly in helper
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
include/drm/display/drm_dsc_helper.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
index 4448c482b092..f6bc268c1719 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -17,6 +17,17 @@ enum drm_dsc_params_kind {
DRM_DSC_1_2_420,
};
+static inline void drm_dsc_set_initial_scale_value(struct drm_dsc_config *dsc)
+{
+ dsc->initial_scale_value = 8 * dsc->rc_model_size /
+ (dsc->rc_model_size - dsc->initial_offset);
+}
+
+static inline int drm_dsc_calculate_flatness_det_thresh(struct drm_dsc_config *dsc)
+{
+ return 2 << (dsc->bits_per_component - 8);
+}
+
void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size);
void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
--
2.39.2
