65 lines
2.2 KiB
Diff
65 lines
2.2 KiB
Diff
From 74f829a6e44fe217b6161f8935524fc807be0648 Mon Sep 17 00:00:00 2001
|
|
From: Chris Wilson <chris@chris-wilson.co.uk>
|
|
Date: Sat, 9 Jul 2016 11:01:20 +0100
|
|
Subject: [PATCH] drm/i915: Acquire audio powerwell for HD-Audio registers
|
|
|
|
On Haswell/Broadwell, the HD-Audio block is inside the HDMI/display
|
|
power well and so the sna-hda audio codec acquires the display power
|
|
well while it is operational. However, Skylake separates the powerwells
|
|
again, but yet we still need the audio powerwell to setup the registers.
|
|
(But then the hardware uses those registers even while powered off???)
|
|
|
|
v2: Grab both rpm wakelock and audio wakelock
|
|
|
|
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96214
|
|
Fixes: 03b135cebc47 "ALSA: hda - remove dependency on i915 power well for SKL")
|
|
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
|
|
Cc: Libin Yang <libin.yang@intel.com>
|
|
Cc: Takashi Iwai <tiwai@suse.de>
|
|
Cc: Marius Vlad <marius.c.vlad@intel.com>
|
|
---
|
|
drivers/gpu/drm/i915/intel_audio.c | 6 ++++++
|
|
1 file changed, 6 insertions(+)
|
|
|
|
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
|
|
index 5d5f6bc10e85..948a7a52e3f8 100644
|
|
--- a/drivers/gpu/drm/i915/intel_audio.c
|
|
+++ b/drivers/gpu/drm/i915/intel_audio.c
|
|
@@ -600,6 +600,8 @@ static void i915_audio_component_codec_wake_override(struct device *dev,
|
|
if (!IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv))
|
|
return;
|
|
|
|
+ i915_audio_component_get_power(dev);
|
|
+
|
|
/*
|
|
* Enable/disable generating the codec wake signal, overriding the
|
|
* internal logic to generate the codec wake to controller.
|
|
@@ -615,6 +617,8 @@ static void i915_audio_component_codec_wake_override(struct device *dev,
|
|
I915_WRITE(HSW_AUD_CHICKENBIT, tmp);
|
|
usleep_range(1000, 1500);
|
|
}
|
|
+
|
|
+ i915_audio_component_put_power(dev);
|
|
}
|
|
|
|
/* Get CDCLK in kHz */
|
|
@@ -648,6 +652,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
|
|
!IS_HASWELL(dev_priv))
|
|
return 0;
|
|
|
|
+ i915_audio_component_get_power(dev);
|
|
mutex_lock(&dev_priv->av_mutex);
|
|
/* 1. get the pipe */
|
|
intel_encoder = dev_priv->dig_port_map[port];
|
|
@@ -698,6 +703,7 @@ static int i915_audio_component_sync_audio_rate(struct device *dev,
|
|
|
|
unlock:
|
|
mutex_unlock(&dev_priv->av_mutex);
|
|
+ i915_audio_component_put_power(dev);
|
|
return err;
|
|
}
|
|
|
|
--
|
|
2.8.1
|
|
|