On 30/03/2023 02:18, Jessica Zhang wrote:
Add helpers to calculate det_thresh_flatness and initial_scale_value as
these calculations are defined within the DSC spec.
Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
---
include/drm/display/drm_dsc_helper.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h
index 4448c482b092..63175650a45e 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -17,6 +17,16 @@ enum drm_dsc_params_kind {
DRM_DSC_1_2_420,
};
+static inline int drm_dsc_calculate_initial_scale_value(struct drm_dsc_config *dsc)
+{
+ return 8 * dsc->rc_model_size / (dsc->rc_model_size - dsc->initial_offset);
Just set this in drm_dsc_config, like other functions do.
+}
+
+static inline int drm_dsc_calculate_det_thresh_flatness(struct drm_dsc_config *dsc)
+{
+ return 2 << (dsc->bits_per_component - 8);
+}
this is flatness_det_thresh, per the standard.
Otherwise LGTM
+
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,
--
With best wishes
Dmitry
