[Intel-gfx] [PATCH 1/4] drm/edid: Fix minimum bpc supported with DSC1.2 for HDMI sink

[Ankit Nautiyal]

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 at intel.com>
Cc: Uma Shankar <uma.shankar at intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
---
 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 bbc25e3b7220..cdf10279e1bd 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5770,7 +5770,8 @@ static void drm_parse_hdmi_forum_scds(struct drm_connector *connector,
 			else if (hf_scds[11] & DRM_EDID_DSC_10BPC)
 				hdmi_dsc->bpc_supported = 10;
 			else
-				hdmi_dsc->bpc_supported = 0;
+				/* Supports min 8 BPC if DSC1.2 is supported*/
+				hdmi_dsc->bpc_supported = 8;
 
 			dsc_max_frl_rate = (hf_scds[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4;
 			drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes,
-- 
2.25.1