Commit 61011e63 authored by Nikola Cornij's avatar Nikola Cornij Committed by Alex Deucher

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: default avatarNikola Cornij <nikola.cornij@amd.com>
Reviewed-by: default avatarEric Bernstein <Eric.Bernstein@amd.com>
Acked-by: default avatarLeo Li <sunpeng.li@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 90bbf637
......@@ -377,6 +377,12 @@ 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);
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