diff options
| author | Dave Airlie <airlied@redhat.com> | 2014-08-05 00:40:20 (GMT) |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2014-08-06 00:11:53 (GMT) |
| commit | 5b215bcff50d549d73e43c09bcccf8eebcc95bac (patch) | |
| tree | 7f81ae58779e5d402ed6539dbc5eb4d25dba2af9 /drivers/gpu/drm/i915/intel_dp.c | |
| parent | f7257a224ebbc897b21d0020cb2fedc43536068f (diff) | |
| download | linux-5b215bcff50d549d73e43c09bcccf8eebcc95bac.tar.xz | |
drm/i915: lock around link status and link training.
We need to take the connection mutex around the link status
check for non-MST case, but also around the MST link training
on short HPDs.
I suspect we actually should have a dpcd lock in the future as
well, that just lock the local copies of dpcd and flags stored
from that.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index ea6ff71..eb52ecf 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -3535,11 +3535,13 @@ go_again: void intel_dp_check_link_status(struct intel_dp *intel_dp) { + struct drm_device *dev = intel_dp_to_dev(intel_dp); struct intel_encoder *intel_encoder = &dp_to_dig_port(intel_dp)->base; u8 sink_irq_vector; u8 link_status[DP_LINK_STATUS_SIZE]; - /* FIXME: This access isn't protected by any locks. */ + WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); + if (!intel_encoder->connectors_active) return; @@ -4058,7 +4060,9 @@ intel_dp_hpd_pulse(struct intel_digital_port *intel_dig_port, bool long_hpd) * we'll check the link status via the normal hot plug path later - * but for short hpds we should check it now */ + drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); intel_dp_check_link_status(intel_dp); + drm_modeset_unlock(&dev->mode_config.connection_mutex); } } return false; |