Messages in this thread Patch in this message |  | | Date | Fri, 10 Feb 2012 14:33:31 -0800 | From | Greg KH <> | Subject | [patch 27/55] drm/i915: DisplayPort hot remove notification to audio driver |
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3.0-stable review patch. If anyone has any objections, please let me know.
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From: Wu Fengguang <fengguang.wu@intel.com>
commit 832afda6a7d7235ef0e09f4ec46736861540da6d upstream.
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> Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/gpu/drm/i915/intel_dp.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -1554,6 +1554,7 @@ 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); }
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