Add helpers to calculate det_thresh_flatness and initial_scale_value as
these calculations are defined within the DSC spec.
Reviewed-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx>
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 fc2104415dcb..753b0034eda7 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -25,5 +25,15 @@ void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg);
int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum drm_dsc_params_type type);
int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
+static inline u8 drm_dsc_initial_scale_value(const struct drm_dsc_config *dsc)
+{
+ return 8 * dsc->rc_model_size / (dsc->rc_model_size - dsc->initial_offset);
+}
+
+static inline u32 drm_dsc_flatness_det_thresh(const struct drm_dsc_config *dsc)
+{
+ return 2 << (dsc->bits_per_component - 8);
+}
+
#endif /* _DRM_DSC_HELPER_H_ */
--
2.40.1
