diff options
Diffstat (limited to '0010-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-suspend.patch')
| -rw-r--r-- | 0010-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-suspend.patch | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/0010-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-suspend.patch b/0010-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-suspend.patch new file mode 100644 index 0000000..6ea75b6 --- /dev/null +++ b/0010-drm-i915-save-AUD_FREQ_CNTRL-state-at-audio-domain-suspend.patch @@ -0,0 +1,86 @@ +From c0da4d4ee458208d5427d0a284173bd39a95d040 Mon Sep 17 00:00:00 2001 +From: Kai Vehmanen <kai.vehmanen@linux.intel.com> +Date: Fri, 20 Sep 2019 11:39:18 +0300 +Subject: drm/i915: save AUD_FREQ_CNTRL state at audio domain suspend + +When audio power domain is suspended, the display driver must +save state of AUD_FREQ_CNTRL on Tiger Lake and Ice Lake +systems. The initial value of the register is set by BIOS and +is read by driver during the audio component init sequence. + +Cc: Jani Nikula <jani.nikula@intel.com> +Cc: Imre Deak <imre.deak@intel.com> +Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> +Signed-off-by: Jani Nikula <jani.nikula@intel.com> +Link: https://patchwork.freedesktop.org/patch/msgid/20190920083918.27057-1-kai.vehmanen@linux.intel.com +--- + drivers/gpu/drm/i915/display/intel_audio.c | 17 +++++++++++++++-- + drivers/gpu/drm/i915/i915_drv.h | 1 + + drivers/gpu/drm/i915/i915_reg.h | 2 ++ + 3 files changed, 18 insertions(+), 2 deletions(-) + +diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c +index ddcccf4408c3..439bc0a93410 100644 +--- a/drivers/gpu/drm/i915/display/intel_audio.c ++++ b/drivers/gpu/drm/i915/display/intel_audio.c +@@ -850,10 +850,17 @@ static unsigned long i915_audio_component_get_power(struct device *kdev) + + ret = intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO); + +- /* Force CDCLK to 2*BCLK as long as we need audio to be powered. */ +- if (dev_priv->audio_power_refcount++ == 0) ++ if (dev_priv->audio_power_refcount++ == 0) { ++ if (IS_TIGERLAKE(dev_priv) || IS_ICELAKE(dev_priv)) { ++ I915_WRITE(AUD_FREQ_CNTRL, dev_priv->audio_freq_cntrl); ++ DRM_DEBUG_KMS("restored AUD_FREQ_CNTRL to 0x%x\n", ++ dev_priv->audio_freq_cntrl); ++ } ++ ++ /* Force CDCLK to 2*BCLK as long as we need audio powered. */ + if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) + glk_force_audio_cdclk(dev_priv, true); ++ } + + return ret; + } +@@ -1114,6 +1121,12 @@ static void i915_audio_component_init(struct drm_i915_private *dev_priv) + return; + } + ++ if (IS_TIGERLAKE(dev_priv) || IS_ICELAKE(dev_priv)) { ++ dev_priv->audio_freq_cntrl = I915_READ(AUD_FREQ_CNTRL); ++ DRM_DEBUG_KMS("init value of AUD_FREQ_CNTRL of 0x%x\n", ++ dev_priv->audio_freq_cntrl); ++ } ++ + dev_priv->audio_component_registered = true; + } + +diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h +index 89b6112bd66b..043ce1b47aeb 100644 +--- a/drivers/gpu/drm/i915/i915_drv.h ++++ b/drivers/gpu/drm/i915/i915_drv.h +@@ -1530,6 +1530,7 @@ struct drm_i915_private { + */ + struct mutex av_mutex; + int audio_power_refcount; ++ u32 audio_freq_cntrl; + + struct { + struct mutex mutex; +diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h +index f8ee9aba3955..e1fe356463ec 100644 +--- a/drivers/gpu/drm/i915/i915_reg.h ++++ b/drivers/gpu/drm/i915/i915_reg.h +@@ -9104,6 +9104,8 @@ enum { + #define HSW_AUD_CHICKENBIT _MMIO(0x65f10) + #define SKL_AUD_CODEC_WAKE_SIGNAL (1 << 15) + ++#define AUD_FREQ_CNTRL _MMIO(0x65900) ++ + /* + * HSW - ICL power wells + * +-- +cgit v1.2.1-1-g437b + |