diff options
Diffstat (limited to 'sound/hda')
| -rw-r--r-- | sound/hda/hdac_controller.c | 58 | ||||
| -rw-r--r-- | sound/hda/hdac_stream.c | 2 |
2 files changed, 58 insertions, 2 deletions
diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c index c0069d0b7875..b5a17cb510a0 100644 --- a/sound/hda/hdac_controller.c +++ b/sound/hda/hdac_controller.c @@ -447,3 +447,61 @@ void snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status, } } EXPORT_SYMBOL_GPL(snd_hdac_bus_handle_stream_irq); + +/** + * snd_hdac_bus_alloc_stream_pages - allocate BDL and other buffers + * @bus: HD-audio core bus + * + * Call this after assigning the all streams. + * Returns zero for success, or a negative error code. + */ +int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus) +{ + struct hdac_stream *s; + int num_streams = 0; + int err; + + list_for_each_entry(s, &bus->stream_list, list) { + /* allocate memory for the BDL for each stream */ + err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV, + BDL_SIZE, &s->bdl); + num_streams++; + if (err < 0) + return -ENOMEM; + } + + if (WARN_ON(!num_streams)) + return -EINVAL; + /* allocate memory for the position buffer */ + err = bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV, + num_streams * 8, &bus->posbuf); + if (err < 0) + return -ENOMEM; + list_for_each_entry(s, &bus->stream_list, list) + s->posbuf = (__le32 *)(bus->posbuf.area + s->index * 8); + + /* single page (at least 4096 bytes) must suffice for both ringbuffes */ + return bus->io_ops->dma_alloc_pages(bus, SNDRV_DMA_TYPE_DEV, + PAGE_SIZE, &bus->rb); +} +EXPORT_SYMBOL_GPL(snd_hdac_bus_alloc_stream_pages); + +/** + * snd_hdac_bus_free_stream_pages - release BDL and other buffers + * @bus: HD-audio core bus + */ +void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus) +{ + struct hdac_stream *s; + + list_for_each_entry(s, &bus->stream_list, list) { + if (s->bdl.area) + bus->io_ops->dma_free_pages(bus, &s->bdl); + } + + if (bus->rb.area) + bus->io_ops->dma_free_pages(bus, &bus->rb); + if (bus->posbuf.area) + bus->io_ops->dma_free_pages(bus, &bus->posbuf); +} +EXPORT_SYMBOL_GPL(snd_hdac_bus_free_stream_pages); diff --git a/sound/hda/hdac_stream.c b/sound/hda/hdac_stream.c index 7f6b845d90eb..8bd67a824b5e 100644 --- a/sound/hda/hdac_stream.c +++ b/sound/hda/hdac_stream.c @@ -24,8 +24,6 @@ void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev, int idx, int direction, int tag) { azx_dev->bus = bus; - if (bus->posbuf.area) - azx_dev->posbuf = (__le32 *)(bus->posbuf.area + idx * 8); /* offset: SDI0=0x80, SDI1=0xa0, ... SDO3=0x160 */ azx_dev->sd_addr = bus->remap_addr + (0x20 * idx + 0x80); /* int mask: SDI0=0x01, SDI1=0x02, ... SDO3=0x80 */ |