diff options
| author | Nikola Cornij <nikola.cornij@amd.com> | 2019-06-05 14:29:47 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-07-18 14:18:08 -0500 |
| commit | 771b286379282ee9676c4233093e4e3c33c78346 (patch) | |
| tree | 826a861970cbd3f7c66cf8ce44afd805cad2614a | |
| parent | a6f30079b8562b659e1d06f7cb1bc30951869bbc (diff) | |
| download | linux-771b286379282ee9676c4233093e4e3c33c78346.tar.bz2 | |
drm/amd/display: Set one 4:2:0-related PPS field as recommended by DSC spec
[why]
'second_line_offset_adj' was mistakenly left at zero, even though DSC spec
v1.2a recommends setting this field to 512 for 4:2:0.
[how]
Set 'second_line_offset_adj' to 512 for 4:2:0 and leave at zero otherwise
Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c b/drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c index 04c6295f296e..fd1fb1653479 100644 --- a/drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c +++ b/drivers/gpu/drm/amd/display/dc/dsc/drm_dsc_dc.c @@ -442,6 +442,12 @@ int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg) vdsc_cfg->rc_bits = (hrd_delay * vdsc_cfg->bits_per_pixel) / 16; vdsc_cfg->initial_dec_delay = hrd_delay - vdsc_cfg->initial_xmit_delay; + /* As per DSC spec v1.2a recommendation: */ + if (vdsc_cfg->native_420) + vdsc_cfg->second_line_offset_adj = 512; + else + vdsc_cfg->second_line_offset_adj = 0; + return 0; } EXPORT_SYMBOL(drm_dsc_compute_rc_parameters); |