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CAT:NONE; SFS:(13230022)(4636009)(396003)(39860400002)(346002)(376002)(136003)(451199015)(40470700004)(36840700001)(46966006)(47076005)(83380400001)(426003)(186003)(336012)(16526019)(82740400003)(36860700001)(2616005)(1076003)(26005)(41300700001)(5660300002)(40480700001)(478600001)(40460700003)(8936002)(82310400005)(8676002)(4326008)(356005)(70586007)(70206006)(81166007)(316002)(6916009)(54906003)(2906002)(36756003)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Sep 2022 00:18:56.8805 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cbb6afbf-d53f-4d84-5fe4-08da9c300a2f X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT014.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB5789 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: stylon.wang@amd.com, Ilya Bakoulin , Sunpeng.Li@amd.com, Harry.Wentland@amd.com, qingqing.zhuo@amd.com, Martin Leung , Rodrigo.Siqueira@amd.com, roman.li@amd.com, solomon.chiu@amd.com, Aurabindo.Pillai@amd.com, wayne.lin@amd.com, Jasdeep Dhillon , Bhawanpreet.Lakha@amd.com, agustin.gutierrez@amd.com, pavle.kotarac@amd.com Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Ilya Bakoulin [Why] Partially valid EDIDs on MST sinks are treated the same way as broken EDIDs or read failures and result in a fallback EDID being used instead. [How] If edid_status is EDID_PARTIAL_VALID, prefer to use the valid EDID blocks instead of using a fallback EDID. Reviewed-by: Martin Leung Acked-by: Jasdeep Dhillon Signed-off-by: Ilya Bakoulin --- drivers/gpu/drm/amd/display/dc/core/dc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index d93393cc66c0..351888fe9b72 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -4061,7 +4061,7 @@ struct dc_sink *dc_link_add_remote_sink( * Treat device as no EDID device if EDID * parsing fails */ - if (edid_status != EDID_OK) { + if (edid_status != EDID_OK && edid_status != EDID_PARTIAL_VALID) { dc_sink->dc_edid.length = 0; dm_error("Bad EDID, status%d!\n", edid_status); } -- 2.25.1