ALSA: hda - Add DSP loader to core library code
Copied from the legacy driver code, no transition done yet. Signed-off-by: Takashi Iwai <tiwai@suse.de>hifive-unleashed-5.1
Takashi Iwai
parent
1475241272
commit
8f3f600b52
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@ -187,6 +187,11 @@ struct hdac_io_ops {
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u16 (*reg_readw)(u16 __iomem *addr);
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void (*reg_writeb)(u8 value, u8 __iomem *addr);
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u8 (*reg_readb)(u8 __iomem *addr);
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/* Allocation ops */
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int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
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struct snd_dma_buffer *buf);
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void (*dma_free_pages)(struct hdac_bus *bus,
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struct snd_dma_buffer *buf);
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};
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#define HDA_UNSOL_QUEUE_SIZE 64
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@ -374,6 +379,7 @@ struct hdac_stream {
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bool opened:1;
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bool running:1;
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bool no_period_wakeup:1;
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bool locked:1;
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/* timestamp */
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unsigned long start_wallclk; /* start + minimum wallclk */
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@ -383,6 +389,10 @@ struct hdac_stream {
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int delay_negative_threshold;
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struct list_head list;
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#ifdef CONFIG_SND_HDA_DSP_LOADER
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/* DSP access mutex */
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struct mutex dsp_mutex;
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#endif
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};
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void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
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@ -440,6 +450,42 @@ void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
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(snd_hdac_stream_readb(dev, reg) & \
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~(mask)) | (val))
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#ifdef CONFIG_SND_HDA_DSP_LOADER
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/* DSP lock helpers */
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#define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
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#define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
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#define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
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#define snd_hdac_stream_is_locked(dev) ((dev)->locked)
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/* DSP loader helpers */
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int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
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unsigned int byte_size, struct snd_dma_buffer *bufp);
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void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
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void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
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struct snd_dma_buffer *dmab);
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#else /* CONFIG_SND_HDA_DSP_LOADER */
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#define snd_hdac_dsp_lock_init(dev) do {} while (0)
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#define snd_hdac_dsp_lock(dev) do {} while (0)
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#define snd_hdac_dsp_unlock(dev) do {} while (0)
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#define snd_hdac_stream_is_locked(dev) 0
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static inline int
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snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
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unsigned int byte_size, struct snd_dma_buffer *bufp)
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{
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return 0;
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}
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static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
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{
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}
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static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
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struct snd_dma_buffer *dmab)
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{
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}
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#endif /* CONFIG_SND_HDA_DSP_LOADER */
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/*
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* generic array helpers
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*/
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@ -1,3 +1,6 @@
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config SND_HDA_CORE
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tristate
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select REGMAP
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config SND_HDA_DSP_LOADER
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bool
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@ -33,6 +33,7 @@ void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
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azx_dev->index = idx;
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azx_dev->direction = direction;
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azx_dev->stream_tag = tag;
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snd_hdac_dsp_lock_init(azx_dev);
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list_add_tail(&azx_dev->list, &bus->stream_list);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_init);
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@ -534,3 +535,115 @@ void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
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}
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}
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EXPORT_SYMBOL_GPL(snd_hdac_stream_sync);
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#ifdef CONFIG_SND_HDA_DSP_LOADER
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/**
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* snd_hdac_dsp_prepare - prepare for DSP loading
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* @azx_dev: HD-audio core stream used for DSP loading
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* @format: HD-audio stream format
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* @byte_size: data chunk byte size
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* @bufp: allocated buffer
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*
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* Allocate the buffer for the given size and set up the given stream for
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* DSP loading. Returns the stream tag (>= 0), or a negative error code.
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*/
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int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
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unsigned int byte_size, struct snd_dma_buffer *bufp)
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{
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struct hdac_bus *bus = azx_dev->bus;
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u32 *bdl;
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int err;
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snd_hdac_dsp_lock(azx_dev);
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spin_lock_irq(&bus->reg_lock);
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if (azx_dev->running || azx_dev->locked) {
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spin_unlock_irq(&bus->reg_lock);
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err = -EBUSY;
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goto unlock;
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}
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azx_dev->locked = true;
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spin_unlock_irq(&bus->reg_lock);
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err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV_SG,
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byte_size, bufp);
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if (err < 0)
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goto err_alloc;
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azx_dev->bufsize = byte_size;
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azx_dev->period_bytes = byte_size;
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azx_dev->format_val = format;
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snd_hdac_stream_reset(azx_dev);
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/* reset BDL address */
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snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
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snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
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azx_dev->frags = 0;
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bdl = (u32 *)azx_dev->bdl.area;
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err = setup_bdle(bus, bufp, azx_dev, &bdl, 0, byte_size, 0);
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if (err < 0)
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goto error;
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snd_hdac_stream_setup(azx_dev);
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snd_hdac_dsp_unlock(azx_dev);
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return azx_dev->stream_tag;
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error:
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bus->io_ops->dma_free_pages(bus, bufp);
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err_alloc:
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spin_lock_irq(&bus->reg_lock);
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azx_dev->locked = false;
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spin_unlock_irq(&bus->reg_lock);
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unlock:
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snd_hdac_dsp_unlock(azx_dev);
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return err;
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}
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EXPORT_SYMBOL_GPL(snd_hdac_dsp_prepare);
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/**
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* snd_hdac_dsp_trigger - start / stop DSP loading
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* @azx_dev: HD-audio core stream used for DSP loading
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* @start: trigger start or stop
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*/
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void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
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{
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if (start)
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snd_hdac_stream_start(azx_dev, true);
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else
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snd_hdac_stream_stop(azx_dev);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_dsp_trigger);
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/**
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* snd_hdac_dsp_cleanup - clean up the stream from DSP loading to normal
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* @azx_dev: HD-audio core stream used for DSP loading
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* @dmab: buffer used by DSP loading
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*/
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void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
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struct snd_dma_buffer *dmab)
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{
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struct hdac_bus *bus = azx_dev->bus;
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if (!dmab->area || !azx_dev->locked)
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return;
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snd_hdac_dsp_lock(azx_dev);
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/* reset BDL address */
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snd_hdac_stream_writel(azx_dev, SD_BDLPL, 0);
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snd_hdac_stream_writel(azx_dev, SD_BDLPU, 0);
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snd_hdac_stream_writel(azx_dev, SD_CTL, 0);
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azx_dev->bufsize = 0;
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azx_dev->period_bytes = 0;
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azx_dev->format_val = 0;
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bus->io_ops->dma_free_pages(bus, dmab);
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dmab->area = NULL;
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spin_lock_irq(&bus->reg_lock);
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azx_dev->locked = false;
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spin_unlock_irq(&bus->reg_lock);
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snd_hdac_dsp_unlock(azx_dev);
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}
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EXPORT_SYMBOL_GPL(snd_hdac_dsp_cleanup);
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#endif /* CONFIG_SND_HDA_DSP_LOADER */
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@ -38,9 +38,6 @@ config SND_HDA_TEGRA
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if SND_HDA
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config SND_HDA_DSP_LOADER
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bool
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config SND_HDA_PREALLOC_SIZE
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int "Pre-allocated buffer size for HD-audio driver"
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range 0 32768
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