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Commit 8f3f600b authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: hda - Add DSP loader to core library code 



Copied from the legacy driver code, no transition done yet.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 14752412

include/sound/hdaudio.h

+46 −0
Original line number Diff line number Diff line
@@ -187,6 +187,11 @@ struct hdac_io_ops { 
	u16 (*reg_readw)(u16 __iomem *addr);

	void (*reg_writeb)(u8 value, u8 __iomem *addr);

	u8 (*reg_readb)(u8 __iomem *addr);

	/* Allocation ops */

	int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,

			       struct snd_dma_buffer *buf);

	void (*dma_free_pages)(struct hdac_bus *bus,

			       struct snd_dma_buffer *buf);

};



#define HDA_UNSOL_QUEUE_SIZE	64
@@ -374,6 +379,7 @@ struct hdac_stream { 
	bool opened:1;

	bool running:1;

	bool no_period_wakeup:1;

	bool locked:1;



	/* timestamp */

	unsigned long start_wallclk;	/* start + minimum wallclk */
@@ -383,6 +389,10 @@ struct hdac_stream { 
	int delay_negative_threshold;



	struct list_head list;

#ifdef CONFIG_SND_HDA_DSP_LOADER

	/* DSP access mutex */

	struct mutex dsp_mutex;

#endif

};



void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
@@ -440,6 +450,42 @@ void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev, 
			       (snd_hdac_stream_readb(dev, reg) & \

				~(mask)) | (val))



#ifdef CONFIG_SND_HDA_DSP_LOADER

/* DSP lock helpers */

#define snd_hdac_dsp_lock_init(dev)	mutex_init(&(dev)->dsp_mutex)

#define snd_hdac_dsp_lock(dev)		mutex_lock(&(dev)->dsp_mutex)

#define snd_hdac_dsp_unlock(dev)	mutex_unlock(&(dev)->dsp_mutex)

#define snd_hdac_stream_is_locked(dev)	((dev)->locked)

/* DSP loader helpers */

int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,

			 unsigned int byte_size, struct snd_dma_buffer *bufp);

void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);

void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,

			  struct snd_dma_buffer *dmab);

#else /* CONFIG_SND_HDA_DSP_LOADER */

#define snd_hdac_dsp_lock_init(dev)	do {} while (0)

#define snd_hdac_dsp_lock(dev)		do {} while (0)

#define snd_hdac_dsp_unlock(dev)	do {} while (0)

#define snd_hdac_stream_is_locked(dev)	0



static inline int

snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,

		     unsigned int byte_size, struct snd_dma_buffer *bufp)

{

	return 0;

}



static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)

{

}



static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,

					struct snd_dma_buffer *dmab)

{

}

#endif /* CONFIG_SND_HDA_DSP_LOADER */





/*

 * generic array helpers

 */

sound/hda/Kconfig

+3 −0
Original line number Diff line number Diff line 
config SND_HDA_CORE

	tristate

	select REGMAP



config SND_HDA_DSP_LOADER

	bool

sound/hda/hdac_stream.c

+113 −0
Original line number Diff line number Diff line
@@ -33,6 +33,7 @@ void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev, 
	azx_dev->index = idx;

	azx_dev->direction = direction;

	azx_dev->stream_tag = tag;

	snd_hdac_dsp_lock_init(azx_dev);

	list_add_tail(&azx_dev->list, &bus->stream_list);

}

EXPORT_SYMBOL_GPL(snd_hdac_stream_init);
@@ -534,3 +535,115 @@ void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start, 
	}

}

EXPORT_SYMBOL_GPL(snd_hdac_stream_sync);



#ifdef CONFIG_SND_HDA_DSP_LOADER

/**

 * snd_hdac_dsp_prepare - prepare for DSP loading

 * @azx_dev: HD-audio core stream used for DSP loading

 * @format: HD-audio stream format

 * @byte_size: data chunk byte size

 * @bufp: allocated buffer

 *

 * Allocate the buffer for the given size and set up the given stream for

 * DSP loading.  Returns the stream tag (>= 0), or a negative error code.

 */

int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,

			 unsigned int byte_size, struct snd_dma_buffer *bufp)

{

	struct hdac_bus *bus = azx_dev->bus;

	u32 *bdl;

	int err;



	snd_hdac_dsp_lock(azx_dev);

	spin_lock_irq(&bus->reg_lock);

	if (azx_dev->running || azx_dev->locked) {

		spin_unlock_irq(&bus->reg_lock);

		err = -EBUSY;

		goto unlock;

	}

	azx_dev->locked = true;

	spin_unlock_irq(&bus->reg_lock);



	err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV_SG,

					   byte_size, bufp);

	if (err < 0)

		goto err_alloc;



	azx_dev->bufsize = byte_size;

	azx_dev->period_bytes = byte_size;

	azx_dev->format_val = format;



	snd_hdac_stream_reset(azx_dev);



	/* reset BDL address */

	snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);

	snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);



	azx_dev->frags = 0;

	bdl = (u32 *)azx_dev->bdl.area;

	err = setup_bdle(bus, bufp, azx_dev, &bdl, 0, byte_size, 0);

	if (err < 0)

		goto error;



	snd_hdac_stream_setup(azx_dev);

	snd_hdac_dsp_unlock(azx_dev);

	return azx_dev->stream_tag;



 error:

	bus->io_ops->dma_free_pages(bus, bufp);

 err_alloc:

	spin_lock_irq(&bus->reg_lock);

	azx_dev->locked = false;

	spin_unlock_irq(&bus->reg_lock);

 unlock:

	snd_hdac_dsp_unlock(azx_dev);

	return err;

}

EXPORT_SYMBOL_GPL(snd_hdac_dsp_prepare);



/**

 * snd_hdac_dsp_trigger - start / stop DSP loading

 * @azx_dev: HD-audio core stream used for DSP loading

 * @start: trigger start or stop

 */

void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)

{

	if (start)

		snd_hdac_stream_start(azx_dev, true);

	else

		snd_hdac_stream_stop(azx_dev);

}

EXPORT_SYMBOL_GPL(snd_hdac_dsp_trigger);



/**

 * snd_hdac_dsp_cleanup - clean up the stream from DSP loading to normal

 * @azx_dev: HD-audio core stream used for DSP loading

 * @dmab: buffer used by DSP loading

 */

void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,

			  struct snd_dma_buffer *dmab)

{

	struct hdac_bus *bus = azx_dev->bus;



	if (!dmab->area || !azx_dev->locked)

		return;



	snd_hdac_dsp_lock(azx_dev);

	/* reset BDL address */

	snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);

	snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);

	snd_hdac_stream_writel(azx_dev, SD_CTL, 0);

	azx_dev->bufsize = 0;

	azx_dev->period_bytes = 0;

	azx_dev->format_val = 0;



	bus->io_ops->dma_free_pages(bus, dmab);

	dmab->area = NULL;



	spin_lock_irq(&bus->reg_lock);

	azx_dev->locked = false;

	spin_unlock_irq(&bus->reg_lock);

	snd_hdac_dsp_unlock(azx_dev);

}

EXPORT_SYMBOL_GPL(snd_hdac_dsp_cleanup);

#endif /* CONFIG_SND_HDA_DSP_LOADER */

sound/pci/hda/Kconfig

+0 −3
Original line number Diff line number Diff line
@@ -38,9 +38,6 @@ config SND_HDA_TEGRA 


if SND_HDA



config SND_HDA_DSP_LOADER

	bool



config SND_HDA_PREALLOC_SIZE

	int "Pre-allocated buffer size for HD-audio driver"

	range 0 32768