diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c index e4b850a2d31f..b3fc71648d16 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c @@ -1507,10 +1507,28 @@ void dcn10_timing_generator_init(struct optc *optc1) optc1->comb_opp_id = 0xf; } +#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT +/* "Containter" vs. "pixel" is a concept within HW blocks, mostly those closer to the back-end. It works like this: + * + * - In most of the formats (RGB or YCbCr 4:4:4, 4:2:2 uncompressed and DSC 4:2:2 Simple) pixel rate is the same as + * containter rate. + * + * - In 4:2:0 (DSC or uncompressed) there are two pixels per container, hence the target container rate has to be + * halved to maintain the correct pixel rate. + * + * - Unlike 4:2:2 uncompressed, DSC 4:2:2 Native also has two pixels per container (this happens when DSC is applied + * to it) and has to be treated the same as 4:2:0, i.e. target containter rate has to be halved in this case as well. + * + */ +#endif bool optc1_is_two_pixels_per_containter(const struct dc_crtc_timing *timing) { bool two_pix = timing->pixel_encoding == PIXEL_ENCODING_YCBCR420; +#ifdef CONFIG_DRM_AMD_DC_DSC_SUPPORT + two_pix = two_pix || (timing->flags.DSC && timing->pixel_encoding == PIXEL_ENCODING_YCBCR422 + && !timing->dsc_cfg.ycbcr422_simple); +#endif return two_pix; } |