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Commit 832afda6 authored by Wu Fengguang's avatar Wu Fengguang Committed by Keith Packard
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drm/i915: DisplayPort hot remove notification to audio driver 



On DP monitor hot remove, clear DP_AUDIO_OUTPUT_ENABLE accordingly,
so that the audio driver will receive hot plug events and take action
to refresh its device state and ELD contents.

Note that the DP_AUDIO_OUTPUT_ENABLE bit may be enabled or disabled
only when the link training is complete and set to "Normal".

Tested OK for both hot plug/remove and DPMS on/off.

Signed-off-by: default avatarWu Fengguang <fengguang.wu@intel.com>
Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
parent 2deed761

drivers/gpu/drm/i915/intel_dp.c

+1 −0
Original line number Diff line number Diff line
@@ -1926,6 +1926,7 @@ intel_dp_link_down(struct intel_dp *intel_dp) 
			intel_wait_for_vblank(dev, to_intel_crtc(crtc)->pipe);

	}



	DP &= ~DP_AUDIO_OUTPUT_ENABLE;

	I915_WRITE(intel_dp->output_reg, DP & ~DP_PORT_EN);

	POSTING_READ(intel_dp->output_reg);

	msleep(intel_dp->panel_power_down_delay);