Re: [PATCH v4 2/5] drm/i915: Add support for audio driver notifications

[Jani Nikula <jani.nikula@linux.intel.com>]

On Sat, 21 Jan 2017, Jerome Anand <jerome.anand@intel.com> wrote:
> Notifiations like mode change, hot plug and edid to
> the audio driver are added. This is inturn used by the
> audio driver for its functionality.
>
> A new interface file capturing the notifications needed by the
> audio driver is added
>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Signed-off-by: Jerome Anand <jerome.anand@intel.com>

Not a detailed technical review, but

Acked-by: Jani Nikula <jani.nikula@intel.com>

One nitpick below, up to you if you care to change.

> ---
>  drivers/gpu/drm/i915/i915_drv.h        |  2 ++
>  drivers/gpu/drm/i915/intel_audio.c     |  8 ++++++
>  drivers/gpu/drm/i915/intel_hdmi.c      |  1 +
>  drivers/gpu/drm/i915/intel_lpe_audio.c | 49 ++++++++++++++++++++++++++++++++++
>  4 files changed, 60 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index cc7033a..601c8ad 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -3623,6 +3623,8 @@ int  intel_lpe_audio_setup(struct drm_i915_private *dev_priv);
>  void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv);
>  void intel_lpe_audio_irq_handler(struct drm_i915_private *dev_priv);
>  bool intel_lpe_audio_detect(struct drm_i915_private *dev_priv);
> +void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
> +			void *eld, int port, int tmds_clk_speed);
>  
>  /* intel_i2c.c */
>  extern int intel_setup_gmbus(struct drm_i915_private *dev_priv);
> diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
> index 16c2027..00a485e 100644
> --- a/drivers/gpu/drm/i915/intel_audio.c
> +++ b/drivers/gpu/drm/i915/intel_audio.c
> @@ -24,6 +24,7 @@
>  #include <linux/kernel.h>
>  #include <linux/component.h>
>  #include <drm/i915_component.h>
> +#include <drm/intel_lpe_audio.h>
>  #include "intel_drv.h"
>  
>  #include <drm/drmP.h>
> @@ -630,6 +631,10 @@ void intel_audio_codec_enable(struct intel_encoder *intel_encoder,
>  	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
>  		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
>  						 (int) port, (int) pipe);
> +
> +	if (HAS_LPE_AUDIO(dev_priv))
> +		intel_lpe_audio_notify(dev_priv, connector->eld, port,
> +			crtc_state->port_clock);

Seems unnecessary to check for HAS_LPE_AUDIO (which you'll change to
dev_priv->lpe_audio.platdev, right ;) both in the caller and
callee. Pick one.

>  }
>  
>  /**
> @@ -663,6 +668,9 @@ void intel_audio_codec_disable(struct intel_encoder *intel_encoder)
>  	if (acomp && acomp->audio_ops && acomp->audio_ops->pin_eld_notify)
>  		acomp->audio_ops->pin_eld_notify(acomp->audio_ops->audio_ptr,
>  						 (int) port, (int) pipe);
> +
> +	if (HAS_LPE_AUDIO(dev_priv))
> +		intel_lpe_audio_notify(dev_priv, NULL, port, 0);
>  }
>  
>  /**
> diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
> index 0bcfead..377584e1 100644
> --- a/drivers/gpu/drm/i915/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/intel_hdmi.c
> @@ -36,6 +36,7 @@
>  #include <drm/drm_edid.h>
>  #include "intel_drv.h"
>  #include <drm/i915_drm.h>
> +#include <drm/intel_lpe_audio.h>
>  #include "i915_drv.h"
>  
>  static struct drm_device *intel_hdmi_to_dev(struct intel_hdmi *intel_hdmi)
> diff --git a/drivers/gpu/drm/i915/intel_lpe_audio.c b/drivers/gpu/drm/i915/intel_lpe_audio.c
> index 099732c..293084d 100644
> --- a/drivers/gpu/drm/i915/intel_lpe_audio.c
> +++ b/drivers/gpu/drm/i915/intel_lpe_audio.c
> @@ -337,3 +337,52 @@ void intel_lpe_audio_teardown(struct drm_i915_private *dev_priv)
>  
>  	irq_free_desc(dev_priv->lpe_audio.irq);
>  }
> +
> +
> +/**
> + * intel_lpe_audio_notify() - notify lpe audio event
> + * audio driver and i915
> + * @dev_priv: the i915 drm device private data
> + * @eld : ELD data
> + * @port: port id
> + * @tmds_clk_speed: tmds clock frequency in Hz
> + *
> + * Notify lpe audio driver of eld change.
> + */
> +void intel_lpe_audio_notify(struct drm_i915_private *dev_priv,
> +			void *eld, int port, int tmds_clk_speed)
> +{
> +	unsigned long irq_flags;
> +	struct intel_hdmi_lpe_audio_pdata *pdata = NULL;
> +
> +	if (!HAS_LPE_AUDIO(dev_priv))
> +		return;
> +
> +	pdata = dev_get_platdata(
> +		&(dev_priv->lpe_audio.platdev->dev));
> +
> +	spin_lock_irqsave(&pdata->lpe_audio_slock, irq_flags);
> +
> +	if (eld != NULL) {
> +		memcpy(pdata->eld.eld_data, eld,
> +			HDMI_MAX_ELD_BYTES);
> +		pdata->eld.port_id = port;
> +		pdata->hdmi_connected = true;
> +
> +		if (tmds_clk_speed)
> +			pdata->tmds_clock_speed = tmds_clk_speed;
> +	} else {
> +		memset(pdata->eld.eld_data, 0,
> +			HDMI_MAX_ELD_BYTES);
> +		pdata->hdmi_connected = false;
> +	}
> +
> +	if (pdata->notify_audio_lpe)
> +		pdata->notify_audio_lpe(
> +			(eld != NULL) ? &pdata->eld : NULL);
> +	else
> +		pdata->notify_pending = true;
> +
> +	spin_unlock_irqrestore(&pdata->lpe_audio_slock,
> +			irq_flags);
> +}

-- 
Jani Nikula, Intel Open Source Technology Center
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