diff options
| -rw-r--r-- | drivers/gpu/drm/display/drm_dsc_helper.c | 24 | ||||
| -rw-r--r-- | include/drm/display/drm_dsc_helper.h | 2 |
2 files changed, 26 insertions, 0 deletions
diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c index fc187a8d8873..4efb6236d22c 100644 --- a/drivers/gpu/drm/display/drm_dsc_helper.c +++ b/drivers/gpu/drm/display/drm_dsc_helper.c @@ -1413,3 +1413,27 @@ int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg) return 0; } EXPORT_SYMBOL(drm_dsc_compute_rc_parameters); + +/** + * drm_dsc_initial_scale_value() - Calculate the initial scale value for the given DSC config + * @dsc: Pointer to DRM DSC config struct + * + * Return: Calculated initial scale value + */ +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); +} +EXPORT_SYMBOL(drm_dsc_initial_scale_value); + +/** + * drm_dsc_flatness_det_thresh() - Calculate the flatness_det_thresh for the given DSC config + * @dsc: Pointer to DRM DSC config struct + * + * Return: Calculated flatness det thresh value + */ +u32 drm_dsc_flatness_det_thresh(const struct drm_dsc_config *dsc) +{ + return 2 << (dsc->bits_per_component - 8); +} +EXPORT_SYMBOL(drm_dsc_flatness_det_thresh); diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h index fc2104415dcb..71789fb34e17 100644 --- a/include/drm/display/drm_dsc_helper.h +++ b/include/drm/display/drm_dsc_helper.h @@ -24,6 +24,8 @@ void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp, 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); +u8 drm_dsc_initial_scale_value(const struct drm_dsc_config *dsc); +u32 drm_dsc_flatness_det_thresh(const struct drm_dsc_config *dsc); #endif /* _DRM_DSC_HELPER_H_ */ |