From 5975254612ce1681260e9fda1997f9e0890a343f Mon Sep 17 00:00:00 2001 From: Eric Yang Date: Thu, 8 Feb 2018 14:05:14 -0500 Subject: [PATCH 3570/4131] drm/amd/display: Treat bad EDID as no EDID We have an mst dock firmware that will emulate an EDID with bad checksum. v2: Tread -> Treat Signed-off-by: Eric Yang Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c index e28904e..6fb5eb6 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc.c @@ -1662,12 +1662,17 @@ struct dc_sink *dc_link_add_remote_sink( &dc_sink->dc_edid, &dc_sink->edid_caps); - if (edid_status != EDID_OK) - goto fail; + /* + * Treat device as no EDID device if EDID + * parsing fails + */ + if (edid_status != EDID_OK) { + dc_sink->dc_edid.length = 0; + dm_error("Bad EDID, status%d!\n", edid_status); + } return dc_sink; -fail: - dc_link_remove_remote_sink(link, dc_sink); + fail_add_sink: dc_sink_release(dc_sink); return NULL; -- 2.7.4