From 4a638b4e38234233f5c7e6705662fbc0b58d80c2 Mon Sep 17 00:00:00 2001 From: Adam Jackson Date: Tue, 25 May 2010 16:33:09 -0400 Subject: [PATCH] drm/edid: Allow non-fatal checksum errors in CEA blocks Switches will try to update the topology address and not correctly fix up the checksum, so just let it slide. https://bugs.freedesktop.org/28229 Signed-off-by: Adam Jackson Signed-off-by: Dave Airlie --- drivers/gpu/drm/drm_edid.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index f569ae88ab38..c1981861bbbd 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -147,7 +147,10 @@ drm_edid_block_valid(u8 *raw_edid) csum += raw_edid[i]; if (csum) { DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); - goto bad; + + /* allow CEA to slide through, switches mangle this */ + if (raw_edid[0] != 0x02) + goto bad; } /* per-block-type checks */ -- 2.20.1