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".
Signed-off-by: Wu Fengguang <fengguang...@intel.com>
---
drivers/gpu/drm/i915/intel_dp.c | 1 +
1 file changed, 1 insertion(+)
This works both on KMS console and gnome desktop.
Hot plug/unplug and DPMS on/off are all tested OK.
--- linux.orig/drivers/gpu/drm/i915/intel_dp.c 2011-12-09 16:51:21.000000000
+0800
+++ linux/drivers/gpu/drm/i915/intel_dp.c 2011-12-09 16:59:45.000000000
+0800
@@ -1771,6 +1771,7 @@ intel_dp_link_down(struct intel_dp *inte
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);
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