| Summary: | EDID valid check ignores errors in CEA blocks | ||
|---|---|---|---|
| Product: | DRI | Reporter: | Stefan Brüns <stefan.bruens> |
| Component: | DRM/other | Assignee: | Default DRI bug account <dri-devel> |
| Status: | RESOLVED INVALID | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | DRI git | ||
| Hardware: | Other | ||
| OS: | All | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
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 To avoid migrating out of date bugs, I am now closing all the bugs that did not see any activity in the past year.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! |
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.
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.