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author | Takashi Iwai <tiwai@suse.de> | 2015-04-14 12:53:28 +0200 |
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committer | Takashi Iwai <tiwai@suse.de> | 2015-04-16 07:28:27 +0200 |
commit | 8f3f600b52b100f254fc16a60af1261d2e4dc239 (patch) | |
tree | 5844bdbf91e4da1bb135469e29f7740559c33a27 /sound/hda | |
parent | ALSA: hda - Add the controller helper codes to hda-core module (diff) | |
download | linux-8f3f600b52b100f254fc16a60af1261d2e4dc239.tar.xz linux-8f3f600b52b100f254fc16a60af1261d2e4dc239.zip |
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>
Diffstat (limited to 'sound/hda')
-rw-r--r-- | sound/hda/Kconfig | 3 | ||||
-rw-r--r-- | sound/hda/hdac_stream.c | 113 |
2 files changed, 116 insertions, 0 deletions
diff --git a/sound/hda/Kconfig b/sound/hda/Kconfig index 001c6588a5ff..7a17fca4f627 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 b513a15c777f..7f6b845d90eb 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 */ |