| Message ID | 20230329-rfc-msm-dsc-helper-v2-1-3c13ced536b2@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce MSM-specific DSC helpers | expand |
On 31/03/2023 21:49, Jessica Zhang wrote: > 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@quicinc.com> > --- > include/drm/display/drm_dsc_helper.h | 11 +++++++++++ > 1 file changed, 11 insertions(+) Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
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,
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@quicinc.com> --- include/drm/display/drm_dsc_helper.h | 11 +++++++++++ 1 file changed, 11 insertions(+)