Re: [RFC 09/11] ALSA: hda - moved interrupt handler to controller library

[Takashi Iwai <tiwai@suse.de>]

At Sun, 12 Apr 2015 18:06:16 +0530,
Subhransu S. Prusty wrote:
> 
> From: Jeeja KP <jeeja.kp@intel.com>
> 
> This will be used by controller legacy and SKL driver
> 
> Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
> ---
>  include/sound/hdaudio.h     |  1 +
>  sound/hda/hdac_controller.c | 24 ++++++++++++++++++++++++
>  2 files changed, 25 insertions(+)
> 
> diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
> index 1f9f4ec..2d62410 100644
> --- a/include/sound/hdaudio.h
> +++ b/include/sound/hdaudio.h
> @@ -293,6 +293,7 @@ void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
>  void snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
>  				    void (*ack)(struct hdac_bus *,
>  						struct hdac_stream *));
> +irqreturn_t snd_hdac_bus_interrupt(int irq, void *dev_id);
>  
>  int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
>  void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
> diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
> index 4d4e0d6..831cc0d 100644
> --- a/sound/hda/hdac_controller.c
> +++ b/sound/hda/hdac_controller.c
> @@ -5,6 +5,7 @@
>  #include <linux/kernel.h>
>  #include <linux/delay.h>
>  #include <linux/export.h>
> +#include <linux/pm_runtime.h>
>  #include <sound/core.h>
>  #include <sound/hdaudio.h>
>  #include <sound/hda_registers.h>
> @@ -381,6 +382,29 @@ EXPORT_SYMBOL_GPL(snd_hdac_bus_stop_chip);
>  /*
>   * interrupt handler
>   */
> +irqreturn_t snd_hdac_bus_interrupt(int irq, void *dev_id)
> +{
> +	struct hdac_bus *chip = dev_id;
> +	u32 status;
> +
> +#ifdef CONFIG_PM
> +	if (!pm_runtime_active(chip->dev))
> +		return IRQ_NONE;
> +#endif
> +
> +	spin_lock(&chip->reg_lock);
> +
> +	status = azx_readl(chip, INTSTS);
> +	if (status == 0 || status == 0xffffffff) {
> +		spin_unlock(&chip->reg_lock);
> +		return IRQ_NONE;
> +	}
> +	spin_unlock(&chip->reg_lock);
> +
> +	return IRQ_WAKE_THREAD;
> +}
> +EXPORT_SYMBOL_GPL(snd_hdac_bus_interrupt);

Again, this is specific to ASoC driver, so let's keep it local.


thanks,

Takashi