mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-12 21:57:43 +00:00
Code Issues Releases Wiki Activity

drm/i915: DisplayPort hot remove notification to audio driver

Browse source 
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: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Wu Fengguang 2011-12-09 20:42:21 +08:00 committed by Keith Packard
parent 2deed76118
commit 832afda6a7
1 changed files with 1 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
drivers/gpu/drm/i915/intel_dp.c
View file

@ -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);