diff options
| author | Ankit Nautiyal <[email protected]> | 2023-11-10 15:40:10 +0530 |
|---|---|---|
| committer | Ankit Nautiyal <[email protected]> | 2023-11-14 15:05:20 +0530 |
| commit | 0c2287c9652150cf659408b66c1789830822132f (patch) | |
| tree | f3f6677a3f8f1172edea534deef5bf628a4737b5 | |
| parent | 59be90248b422f2924872de0be2867652214096a (diff) | |
drm/display/dp: Add helper function to get DSC bpp precision
Add helper to get the DSC bits_per_pixel precision for the DP sink.
Signed-off-by: Ankit Nautiyal <[email protected]>
Reviewed-by: Suraj Kandpal <[email protected]>
Reviewed-by: Sui Jingfeng <[email protected]>
Acked-by: Maxime Ripard <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
| -rw-r--r-- | drivers/gpu/drm/display/drm_dp_helper.c | 27 | ||||
| -rw-r--r-- | include/drm/display/drm_dp_helper.h | 1 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c index 64c151e4f78c..ff8d67d0e9dc 100644 --- a/drivers/gpu/drm/display/drm_dp_helper.c +++ b/drivers/gpu/drm/display/drm_dp_helper.c @@ -2326,6 +2326,33 @@ int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc, EXPORT_SYMBOL(drm_dp_read_desc); /** + * drm_dp_dsc_sink_bpp_incr() - Get bits per pixel increment + * @dsc_dpcd: DSC capabilities from DPCD + * + * Returns the bpp precision supported by the DP sink. + */ +u8 drm_dp_dsc_sink_bpp_incr(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]) +{ + u8 bpp_increment_dpcd = dsc_dpcd[DP_DSC_BITS_PER_PIXEL_INC - DP_DSC_SUPPORT]; + + switch (bpp_increment_dpcd) { + case DP_DSC_BITS_PER_PIXEL_1_16: + return 16; + case DP_DSC_BITS_PER_PIXEL_1_8: + return 8; + case DP_DSC_BITS_PER_PIXEL_1_4: + return 4; + case DP_DSC_BITS_PER_PIXEL_1_2: + return 2; + case DP_DSC_BITS_PER_PIXEL_1_1: + return 1; + } + + return 0; +} +EXPORT_SYMBOL(drm_dp_dsc_sink_bpp_incr); + +/** * drm_dp_dsc_sink_max_slice_count() - Get the max slice count * supported by the DSC sink. * @dsc_dpcd: DSC capabilities from DPCD diff --git a/include/drm/display/drm_dp_helper.h b/include/drm/display/drm_dp_helper.h index 3c59f64d4a69..194715083399 100644 --- a/include/drm/display/drm_dp_helper.h +++ b/include/drm/display/drm_dp_helper.h @@ -164,6 +164,7 @@ drm_dp_is_branch(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) } /* DP/eDP DSC support */ +u8 drm_dp_dsc_sink_bpp_incr(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]); u8 drm_dp_dsc_sink_max_slice_count(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE], bool is_edp); u8 drm_dp_dsc_sink_line_buf_depth(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_SIZE]); |