diff options
| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-05-24 20:45:15 +0300 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2023-06-15 12:58:56 +0300 |
| commit | e871a70d8ccd6dbcb30f081f5d3d8854380422fe (patch) | |
| tree | 2aaf2077c5180566cc06894e3361d25121e8bf47 /drivers/gpu/drm/display | |
| parent | 7df1ed6ddf3da52b020ef3c3f5597bc628c3e58e (diff) | |
| download | linux-e871a70d8ccd6dbcb30f081f5d3d8854380422fe.tar.xz | |
drm/display/dsc: add helper to set semi-const parameters
Add a helper setting config values which are typically constant across
operating modes (table E-4 of the standard) and mux_word_size (which is
a const according to 3.5.2).
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/539280/
Link: https://lore.kernel.org/r/20230329-rfc-msm-dsc-helper-v14-2-bafc7be95691@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Diffstat (limited to 'drivers/gpu/drm/display')
| -rw-r--r-- | drivers/gpu/drm/display/drm_dsc_helper.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c index 4efb6236d22c..b31fe9849784 100644 --- a/drivers/gpu/drm/display/drm_dsc_helper.c +++ b/drivers/gpu/drm/display/drm_dsc_helper.c @@ -270,6 +270,28 @@ void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload, } EXPORT_SYMBOL(drm_dsc_pps_payload_pack); +/** + * drm_dsc_set_const_params() - Set DSC parameters considered typically + * constant across operation modes + * + * @vdsc_cfg: + * DSC Configuration data partially filled by driver + */ +void drm_dsc_set_const_params(struct drm_dsc_config *vdsc_cfg) +{ + if (!vdsc_cfg->rc_model_size) + vdsc_cfg->rc_model_size = DSC_RC_MODEL_SIZE_CONST; + vdsc_cfg->rc_edge_factor = DSC_RC_EDGE_FACTOR_CONST; + vdsc_cfg->rc_tgt_offset_high = DSC_RC_TGT_OFFSET_HI_CONST; + vdsc_cfg->rc_tgt_offset_low = DSC_RC_TGT_OFFSET_LO_CONST; + + if (vdsc_cfg->bits_per_component <= 10) + vdsc_cfg->mux_word_size = DSC_MUX_WORD_SIZE_8_10_BPC; + else + vdsc_cfg->mux_word_size = DSC_MUX_WORD_SIZE_12_BPC; +} +EXPORT_SYMBOL(drm_dsc_set_const_params); + /* From DSC_v1.11 spec, rc_parameter_Set syntax element typically constant */ static const u16 drm_dsc_rc_buf_thresh[] = { 896, 1792, 2688, 3584, 4480, 5376, 6272, 6720, 7168, 7616, |