[Bug 92728] New: connector properties sometimes go outdated

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92728

            Bug ID: 92728
           Summary: connector properties sometimes go outdated
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: tiagomatos at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

The intel ddx sometimes doesn't return the edid on a XRRGetOutputProperty()
call. The wrong seems to be due to sna_output->prop_values not being up to
date.

If I force the properties to be updated on sna_output_attach_edid() I always
get a valid edid. Something like:

@@ -3235,6 +3238,8 @@ sna_output_attach_edid(xf86OutputPtr output)
        if (sna_output->edid_idx == -1)
                return;

+        update_properties(sna, sna_output);
+
        raw = sna_output->edid_raw;
        blob.length = sna_output->edid_len;


that's unlikely to the the correct solution since it seems that the driver is
trying to cache these values but I'm not sure where's the correct place to
invalidate the cache.

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