diff options
| -rw-r--r-- | include/sound/hdaudio.h | 46 | ||||
| -rw-r--r-- | sound/hda/Kconfig | 3 | ||||
| -rw-r--r-- | sound/hda/hdac_stream.c | 113 | ||||
| -rw-r--r-- | sound/pci/hda/Kconfig | 3 |
4 files changed, 162 insertions, 3 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index 9349ccf..69f27bc 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -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 */ diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig index 001c658..7a17fca 100644 --- a/sound/hda/Kconfig +++ b/sound/hda/Kconfig @@ -1,3 +1,6 @@ config SND_HDA_CORE tristate select REGMAP + +config SND_HDA_DSP_LOADER + bool diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c index b513a15..7f6b845 100644 --- a/sound/hda/hdac_stream.c +++ b/sound/hda/hdac_stream.c @@ -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 */ diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig index a5ed1c1..47aa7b8 100644 --- a/sound/pci/hda/Kconfig +++ b/sound/pci/hda/Kconfig @@ -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 |
