linux-kernel - [PATCH AUTOSEL 6.0 18/30] drm/amd/display: Ignore Cable ID Feature

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Date:   Thu, 10 Nov 2022 21:33:26 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Fangzhi Zuo <Jerry.Zuo@....com>,
        Mark Broadworth <mark.broadworth@....com>,
        Roman Li <Roman.Li@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, harry.wentland@....com,
        sunpeng.li@....com, christian.koenig@....com, Xinhui.Pan@....com,
        airlied@...il.com, daniel@...ll.ch, nicholas.kazlauskas@....com,
        aurabindo.pillai@....com, roman.li@....com,
        amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.0 18/30] drm/amd/display: Ignore Cable ID Feature

From: Fangzhi Zuo <Jerry.Zuo@....com>

[ Upstream commit 14aed119942f6c2f1286022323139f7404db5d2b ]

Ignore cable ID for DP2 receivers that does not support the feature.

Tested-by: Mark Broadworth <mark.broadworth@....com>
Reviewed-by: Roman Li <Roman.Li@....com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@....com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 3be70848b202..54c76ed1ad75 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1549,6 +1549,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 
 	adev->dm.dc->debug.visual_confirm = amdgpu_dc_visual_confirm;
 
+	/* TODO: Remove after DP2 receiver gets proper support of Cable ID feature */
+	adev->dm.dc->debug.ignore_cable_id = true;
+
 	r = dm_dmub_hw_init(adev);
 	if (r) {
 		DRM_ERROR("DMUB interface failed to initialize: status=%d\n", r);
-- 
2.35.1