From: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx>
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>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
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..bfa7f3acafcb 100644
--- a/include/drm/display/drm_dsc_helper.h
+++ b/include/drm/display/drm_dsc_helper.h
@@ -26,5 +26,16 @@ 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_kind kind);
int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
+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);
+}
+
#endif /* _DRM_DSC_HELPER_H_ */
--
2.39.2
