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From: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Subject: [PATCH 1/2] drm/edid: Fix minimum bpc supported with DSC1.2 for HDMI sink
Date: Mon,  9 May 2022 15:01:29 +0530	[thread overview]
Message-ID: <20220509093130.3511032-2-ankit.k.nautiyal@intel.com> (raw)
In-Reply-To: <20220509093130.3511032-1-ankit.k.nautiyal@intel.com>

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>

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@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 47d121e99201..ce5e23897c9e 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5288,7 +5288,8 @@ 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


WARNING: multiple messages have this Message-ID (diff)
From: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Subject: [Intel-gfx] [PATCH 1/2] drm/edid: Fix minimum bpc supported with DSC1.2 for HDMI sink
Date: Mon,  9 May 2022 15:01:29 +0530	[thread overview]
Message-ID: <20220509093130.3511032-2-ankit.k.nautiyal@intel.com> (raw)
In-Reply-To: <20220509093130.3511032-1-ankit.k.nautiyal@intel.com>

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>

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@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 47d121e99201..ce5e23897c9e 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5288,7 +5288,8 @@ 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


  reply	other threads:[~2022-05-09  9:31 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-09  9:31 [PATCH 0/2] Prune unsupported modes as per HDMI2.1 spec Ankit Nautiyal
2022-05-09  9:31 ` [Intel-gfx] " Ankit Nautiyal
2022-05-09  9:31 ` Ankit Nautiyal [this message]
2022-05-09  9:31   ` [Intel-gfx] [PATCH 1/2] drm/edid: Fix minimum bpc supported with DSC1.2 for HDMI sink Ankit Nautiyal
2022-05-09  9:31 ` [PATCH 2/2] drm/i915/hdmi: Prune unsupported modes as per HDMI2.1 spec Ankit Nautiyal
2022-05-09  9:31   ` [Intel-gfx] " Ankit Nautiyal
2022-05-10  7:01   ` Ville Syrjälä
2022-05-10  7:01     ` [Intel-gfx] " Ville Syrjälä
2022-05-12  5:02     ` Nautiyal, Ankit K
2022-05-12  5:02       ` [Intel-gfx] " Nautiyal, Ankit K
2022-05-09 19:06 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
2022-05-10  4:20 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork

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