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drm/i915: HDMI hot remove notification to audio driver 

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

The cleared SDVO_AUDIO_ENABLE bit needs to be restored to prevent losing
HDMI audio after DPMS on.

CC: Wang Zhenyu <zhenyu.z.wang@intel.com>
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 20:42:20 +08:00 committed by Keith Packard
parent 3a9627f4fb
commit 2deed76118
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/i915/intel_hdmi.c
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@ -269,6 +269,10 @@ static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
u32 temp;
u32 enable_bits = SDVO_ENABLE;
if (intel_hdmi->has_audio)
enable_bits |= SDVO_AUDIO_ENABLE;
temp = I915_READ(intel_hdmi->sdvox_reg);
@ -281,9 +285,9 @@ static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)
}
if (mode != DRM_MODE_DPMS_ON) {
temp &= ~SDVO_ENABLE;
temp &= ~enable_bits;
} else {
temp |= SDVO_ENABLE;
temp |= enable_bits;
}
I915_WRITE(intel_hdmi->sdvox_reg, temp);