Re: [PATCH 1/3] drm/i915/audio: Track temporary rpm wakerefs

From: John Harrison <John.C.Harrison@Intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Cc: alsa-devel@alsa-project.org
Subject: Re: [PATCH 1/3] drm/i915/audio: Track temporary rpm wakerefs
Date: Mon, 14 Jan 2019 10:07:59 -0800	[thread overview]
Message-ID: <81cc9f38-605c-8dc8-bee7-e4efac4bf848@Intel.com> (raw)
In-Reply-To: <20190114173753.472-1-chris@chris-wilson.co.uk>

On 1/14/2019 09:37, Chris Wilson wrote:
> Track the temporary rpm wakerefs used within audio so that they may be
> marked as complete and the tracking cancelled upon release.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>   drivers/gpu/drm/i915/intel_audio.c | 10 ++++++----
>   1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> index de26cd0a5497..92e27359c2e3 100644
> --- a/drivers/gpu/drm/i915/intel_audio.c
> +++ b/drivers/gpu/drm/i915/intel_audio.c
> @@ -756,12 +756,13 @@ static void i915_audio_component_codec_wake_override(struct device *kdev,
>   						     bool enable)
>   {
>   	struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
> +	intel_wakeref_t wakeref;
>   	u32 tmp;
>   
>   	if (!IS_GEN(dev_priv, 9))
>   		return;
>   
> -	i915_audio_component_get_power(kdev);
> +	wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
Why remove the audio power abstraction from these functions when the 
next patch is to update the abstraction to use the wakeref interface?

John.

>   
>   	/*
>   	 * Enable/disable generating the codec wake signal, overriding the
> @@ -779,7 +780,7 @@ static void i915_audio_component_codec_wake_override(struct device *kdev,
>   		usleep_range(1000, 1500);
>   	}
>   
> -	i915_audio_component_put_power(kdev);
> +	intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO, wakeref);
>   }
>   
>   /* Get CDCLK in kHz  */
> @@ -850,12 +851,13 @@ static int i915_audio_component_sync_audio_rate(struct device *kdev, int port,
>   	struct i915_audio_component *acomp = dev_priv->audio_component;
>   	struct intel_encoder *encoder;
>   	struct intel_crtc *crtc;
> +	intel_wakeref_t wakeref;
>   	int err = 0;
>   
>   	if (!HAS_DDI(dev_priv))
>   		return 0;
>   
> -	i915_audio_component_get_power(kdev);
> +	wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
>   	mutex_lock(&dev_priv->av_mutex);
>   
>   	/* 1. get the pipe */
> @@ -875,7 +877,7 @@ static int i915_audio_component_sync_audio_rate(struct device *kdev, int port,
>   
>    unlock:
>   	mutex_unlock(&dev_priv->av_mutex);
> -	i915_audio_component_put_power(kdev);
> +	intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO, wakeref);
>   	return err;
>   }
>   

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