* [Bug 80683] New: EDID valid check ignores errors in CEA blocks
@ 2014-06-29 17:41 bugzilla-daemon
2019-10-14 13:20 ` [Bug 80683] " bugzilla-daemon
0 siblings, 1 reply; 2+ messages in thread
From: bugzilla-daemon @ 2014-06-29 17:41 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=80683
Priority: medium
Bug ID: 80683
Assignee: dri-devel@lists.freedesktop.org
Summary: EDID valid check ignores errors in CEA blocks
Severity: normal
Classification: Unclassified
OS: All
Reporter: stefan.bruens@rwth-aachen.de
Hardware: Other
Status: NEW
Version: DRI CVS
Component: DRM/other
Product: DRI
in linux/drivers/gpu/drm/drm_edid.c:
bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid)
{
...
if (csum) {
if (print_bad_edid) {
DRM_ERROR("EDID checksum is invalid, remainder is
%d\n", csum);
}
/* allow CEA to slide through, switches mangle this */
if (raw_edid[0] != 0x02)
goto bad;
}
...
return true;
---
i.e. CEA blocks are always reported as valid.
This occurs frequently for me with a Radeon 7750 and a Dell U2713HM connected
via DisplayPort, the I2C-over-AUX seems to be buggy and swallows single bytes.
If I change the "return true;" to "return !csum;" bad transfers are retried.
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* [Bug 80683] EDID valid check ignores errors in CEA blocks
2014-06-29 17:41 [Bug 80683] New: EDID valid check ignores errors in CEA blocks bugzilla-daemon
@ 2019-10-14 13:20 ` bugzilla-daemon
0 siblings, 0 replies; 2+ messages in thread
From: bugzilla-daemon @ 2019-10-14 13:20 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=80683
Martin Peres <martin.peres@free.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |INVALID
Status|NEW |RESOLVED
--- Comment #1 from Martin Peres <martin.peres@free.fr> ---
Hi,
Freedesktop's Bugzilla instance is EOLed and open bugs are about to be migrated
to http://gitlab.freedesktop.org.
To avoid migrating out of date bugs, I am now closing all the bugs that did not
see any activity in the past year. If the issue is still happening, please
create a new bug in the relevant project at https://gitlab.freedesktop.org/drm
(use misc by default).
Sorry about the noise!
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