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drm/i915: Warn if panel power is already on when enabling it 

We should never enable the panel power twice. That would indicate a bug
somewhere else as we would need to enable the port twice without
disabling it in between. Also print the port name.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-10-16 21:30:07 +03:00 committed by Daniel Vetter
parent 3936fcf453
commit e7a89acea8
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/i915/intel_dp.c
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@ -1629,10 +1629,10 @@ static void edp_panel_on(struct intel_dp *intel_dp)
DRM_DEBUG_KMS("Turn eDP port %c panel power on\n", DRM_DEBUG_KMS("Turn eDP port %c panel power on\n",
port_name(dp_to_dig_port(intel_dp)->port)); port_name(dp_to_dig_port(intel_dp)->port));
if (edp_have_panel_power(intel_dp)) { if (WARN(edp_have_panel_power(intel_dp),
DRM_DEBUG_KMS("eDP power already on\n"); "eDP port %c panel power already on\n",
port_name(dp_to_dig_port(intel_dp)->port)))
return; return;
}
wait_panel_power_cycle(intel_dp); wait_panel_power_cycle(intel_dp);