[Bug 47007] HDMI monitor polling causing 100ms rendering stalls

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=47007

--- Comment #6 from Tvrtko Ursulin <tvrtko.ursulin at onelan.co.uk> 2012-03-07 02:10:26 PST ---
Further investigation along the lines of your comment.

For the HDMI connector ATOM_HPD_INT_RECORD_TYPE contains a gpio->mask of 0x100
which translates to RADEON_HPD_2. hpd.plugged_state is zero.

When hpd.hpd is not RADEON_HPD_NONE radeon_add_atom_connector sets
connector->polled to DRM_CONNECTOR_POLL_HPD. So if poll helper is running it
will result in the observed behaviour -> discard and re-fetch full EDID on
every poll even when the connector hasn't been re-connected.

But you are saying poll helper should not be running right? I'll investigate
that area next.

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