From: Ankit Nautiyal ankit.k.nautiyal@intel.com
[ Upstream commit 18feaf6d0784dcba888859109676adf1e0260dfd ]
HF-VSDB/SCDB has bits to advertise support for 16, 12 and 10 bpc. If none of the bits are set, the minimum bpc supported with DSC is 8.
This patch corrects the min bpc supported to be 8, instead of 0.
Fixes: 76ee7b905678 ("drm/edid: Parse DSC1.2 cap fields from HFVSDB block") Cc: Ankit Nautiyal ankit.k.nautiyal@intel.com Cc: Uma Shankar uma.shankar@intel.com Cc: Jani Nikula jani.nikula@intel.com Cc: Maarten Lankhorst maarten.lankhorst@linux.intel.com
v2: s/DSC1.2/DSC 1.2
Signed-off-by: Ankit Nautiyal ankit.k.nautiyal@intel.com Reviewed-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Jani Nikula jani.nikula@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20220916100551.2531750-2-ankit... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/drm_edid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 6ab048ba8021c..d940c76419c5a 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4942,7 +4942,8 @@ static void drm_parse_hdmi_forum_vsdb(struct drm_connector *connector, else if (hf_vsdb[11] & DRM_EDID_DSC_10BPC) hdmi_dsc->bpc_supported = 10; else - hdmi_dsc->bpc_supported = 0; + /* Supports min 8 BPC if DSC 1.2 is supported*/ + hdmi_dsc->bpc_supported = 8;
dsc_max_frl_rate = (hf_vsdb[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4; drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes,