| Message ID | 1481202716-31317-1-git-send-email-tomeu.vizoso@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
> == Series Details == > > Series: drm/edid: Don't print an error if the checksum of a CEA block is wrong > URL : https://patchwork.freedesktop.org/series/16556/ > State : warning > > == Summary == > > Series 16556v1 drm/edid: Don't print an error if the checksum of a CEA block is > wrong > https://patchwork.freedesktop.org/api/1.0/series/16556/revisions/1/mbox/ > > Test kms_pipe_crc_basic: > Subgroup suspend-read-crc-pipe-a: > pass -> DMESG-WARN (fi-skl-6770hq) Still: https://bugs.freedesktop.org/show_bug.cgi?id=97929 > > fi-bdw-5557u total:247 pass:233 dwarn:0 dfail:0 fail:0 skip:14 > fi-bsw-n3050 total:247 pass:208 dwarn:0 dfail:0 fail:0 skip:39 > fi-bxt-t5700 total:247 pass:220 dwarn:0 dfail:0 fail:0 skip:27 > fi-byt-j1900 total:247 pass:220 dwarn:0 dfail:0 fail:0 skip:27 > fi-byt-n2820 total:247 pass:216 dwarn:0 dfail:0 fail:0 skip:31 > fi-hsw-4770 total:247 pass:228 dwarn:0 dfail:0 fail:0 skip:19 > fi-hsw-4770r total:247 pass:228 dwarn:0 dfail:0 fail:0 skip:19 > fi-ilk-650 total:247 pass:195 dwarn:0 dfail:0 fail:0 skip:52 > fi-ivb-3520m total:247 pass:226 dwarn:0 dfail:0 fail:0 skip:21 > fi-ivb-3770 total:247 pass:226 dwarn:0 dfail:0 fail:0 skip:21 > fi-kbl-7500u total:247 pass:226 dwarn:0 dfail:0 fail:0 skip:21 > fi-skl-6260u total:247 pass:234 dwarn:0 dfail:0 fail:0 skip:13 > fi-skl-6700hq total:247 pass:227 dwarn:0 dfail:0 fail:0 skip:20 > fi-skl-6700k total:247 pass:224 dwarn:3 dfail:0 fail:0 skip:20 > fi-skl-6770hq total:247 pass:233 dwarn:1 dfail:0 fail:0 skip:13 > fi-snb-2520m total:247 pass:216 dwarn:0 dfail:0 fail:0 skip:31 > fi-snb-2600 total:247 pass:215 dwarn:0 dfail:0 fail:0 skip:32 > > 24cc1f39920c0caf747c6bda267ca19b99f21786 drm-tip: 2016y-12m-08d-12h- > 31m-59s UTC integration manifest 471fc5b drm/edid: Don't print an error if the > checksum of a CEA block is wrong > > == Logs == > > For more details see: https://intel-gfx-ci.01.org/CI/Patchwork_3237/ Jani Saarinen Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 6798c3ad9d53..db79bc949216 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1128,16 +1128,19 @@ bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid, csum = drm_edid_block_checksum(raw_edid); if (csum) { - if (print_bad_edid) { - DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); - } - if (edid_corrupt) *edid_corrupt = true; /* allow CEA to slide through, switches mangle this */ - if (raw_edid[0] != 0x02) + if (raw_edid[0] == CEA_EXT) { + DRM_DEBUG("EDID checksum is invalid, remainder is %d\n", csum); + DRM_DEBUG("Assuming a KVM switch modified the CEA block but left the original checksum\n"); + } else { + if (print_bad_edid) + DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum); + goto bad; + } } /* per-block-type checks */
It's common to share screens within CI labs, and it's also common for KVM switches to alter the contents of the CEA block but leave the checksum outdated. So in this case, print a debug message instead of an error. References: https://bugs.freedesktop.org/show_bug.cgi?id=98228 Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tomi Sarvela <tomi.p.sarvela@intel.com> Cc: intel-gfx@lists.freedesktop.org Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> --- drivers/gpu/drm/drm_edid.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)