linux-kernel - FAILED: Patch "drm/amd/display: Add monitor patch for specific eDP" failed to apply to 4.19-stable tree

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Message-ID: <20240327122752.2842291-1-sashal@kernel.org>
Date: Wed, 27 Mar 2024 08:27:52 -0400
From: Sasha Levin <sashal@...nel.org>
To: stable@...r.kernel.org,
	ivlipski@....com
Cc: Daniel Wheeler <daniel.wheeler@....com>,
	Sun peng Li <sunpeng.li@....com>,
	Rodrigo Siqueira <rodrigo.siqueira@....com>,
	Alex Deucher <alexander.deucher@....com>,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: FAILED: Patch "drm/amd/display: Add monitor patch for specific eDP" failed to apply to 4.19-stable tree

The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@...r.kernel.org>.

Thanks,
Sasha

------------------ original commit in Linus's tree ------------------

>From 21afc872fbc29cd68cfde816d1df4d55848c3f61 Mon Sep 17 00:00:00 2001
From: Ivan Lipski <ivlipski@....com>
Date: Fri, 1 Dec 2023 06:25:16 -0700
Subject: [PATCH] drm/amd/display: Add monitor patch for specific eDP

[WHY]
Some eDP panels's ext caps don't write initial value cause the value of
dpcd_addr(0x317) is random.  It means that sometimes the eDP will
clarify it is OLED, miniLED...etc cause the backlight control interface
is incorrect.

[HOW]
Add a new panel patch to remove sink ext caps(HDR,OLED...etc)

Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Reviewed-by: Sun peng Li <sunpeng.li@....com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@....com>
Signed-off-by: Ivan Lipski <ivlipski@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
index b4696ec621c45..eaf8d9f482446 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -64,6 +64,12 @@ static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
 		DRM_DEBUG_DRIVER("Disabling FAMS on monitor with panel id %X\n", panel_id);
 		edid_caps->panel_patch.disable_fams = true;
 		break;
+	/* Workaround for some monitors that do not clear DPCD 0x317 if FreeSync is unsupported */
+	case drm_edid_encode_panel_id('A', 'U', 'O', 0xA7AB):
+	case drm_edid_encode_panel_id('A', 'U', 'O', 0xE69B):
+		DRM_DEBUG_DRIVER("Clearing DPCD 0x317 on monitor with panel id %X\n", panel_id);
+		edid_caps->panel_patch.remove_sink_ext_caps = true;
+		break;
 	default:
 		return;
 	}
-- 
2.43.0