diff options
author | Lyude <cpaul@redhat.com> | 2016-06-21 17:03:43 -0400 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-07-14 22:06:11 +0200 |
commit | b236d7c8421969ac0693fc571e47ee5c2a62fb90 (patch) | |
tree | ff8053bce8d1162f03cae1603e0cd39a4991e877 /drivers/memstick | |
parent | 9504a89247595b6c066c68aea0c34af1fc78d021 (diff) | |
download | linux-b236d7c8421969ac0693fc571e47ee5c2a62fb90.tar.gz |
drm/i915/vlv: Disable HPD in valleyview_crt_detect_hotplug()
One of the things preventing us from using polling is the fact that calling valleyview_crt_detect_hotplug() when there's a VGA cable connected results in sending another hotplug. With polling enabled when HPD is disabled, this results in a scenario like this: - We enable power wells and reset the ADPA - output_poll_exec does force probe on VGA, triggering a hpd - HPD handler waits for poll to unlock dev->mode_config.mutex - output_poll_exec shuts off the ADPA, unlocks dev->mode_config.mutex - HPD handler runs, resets ADPA and brings us back to the start This results in an endless irq storm getting sent from the ADPA whenever a VGA connector gets detected in the middle of polling. Somewhat based off of the "drm/i915: Disable CRT HPD around force trigger" patch Ville Syrjälä sent a while back Cc: stable@vger.kernel.org Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Lyude <cpaul@redhat.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/memstick')
0 files changed, 0 insertions, 0 deletions