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| author | Ankit Nautiyal <ankit.k.nautiyal@intel.com> | 2023-11-10 15:40:10 +0530 |
|---|---|---|
| committer | Ankit Nautiyal <ankit.k.nautiyal@intel.com> | 2023-11-14 15:05:20 +0530 |
| commit | 0c2287c9652150cf659408b66c1789830822132f (patch) | |
| tree | f3f6677a3f8f1172edea534deef5bf628a4737b5 /drivers/gpu/drm/display | |
| parent | 59be90248b422f2924872de0be2867652214096a (diff) | |
| download | linux-0c2287c9652150cf659408b66c1789830822132f.tar.gz linux-0c2287c9652150cf659408b66c1789830822132f.tar.bz2 linux-0c2287c9652150cf659408b66c1789830822132f.zip | |
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 <ankit.k.nautiyal@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231110101020.4067342-2-ankit.k.nautiyal@intel.com
Diffstat (limited to 'drivers/gpu/drm/display')
| -rw-r--r-- | drivers/gpu/drm/display/drm_dp_helper.c | 27 |
1 files changed, 27 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 |