diff options
Diffstat (limited to '')
-rw-r--r-- | sound/core/pcm_dmaengine.c | 56 |
1 files changed, 37 insertions, 19 deletions
diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c index 5749a8a49784..494ec0c207fa 100644 --- a/sound/core/pcm_dmaengine.c +++ b/sound/core/pcm_dmaengine.c @@ -48,6 +48,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_get_chan); * * This function can be used to initialize a dma_slave_config from a substream * and hw_params in a dmaengine based PCM driver implementation. + * + * Return: zero if successful, or a negative error code */ int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream, const struct snd_pcm_hw_params *params, @@ -91,8 +93,8 @@ EXPORT_SYMBOL_GPL(snd_hwparams_to_dma_slave_config); * @dma_data: DAI DMA data * @slave_config: DMA slave configuration * - * Initializes the {dst,src}_addr, {dst,src}_maxburst, {dst,src}_addr_width and - * slave_id fields of the DMA slave config from the same fields of the DAI DMA + * Initializes the {dst,src}_addr, {dst,src}_maxburst, {dst,src}_addr_width + * fields of the DMA slave config from the same fields of the DAI DMA * data struct. The src and dst fields will be initialized depending on the * direction of the substream. If the substream is a playback stream the dst * fields will be initialized, if it is a capture stream the src fields will be @@ -124,18 +126,21 @@ void snd_dmaengine_pcm_set_config_from_dai_data( slave_config->src_addr_width = dma_data->addr_width; } - slave_config->slave_id = dma_data->slave_id; + slave_config->peripheral_config = dma_data->peripheral_config; + slave_config->peripheral_size = dma_data->peripheral_size; } EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_set_config_from_dai_data); static void dmaengine_pcm_dma_complete(void *arg) { + unsigned int new_pos; struct snd_pcm_substream *substream = arg; struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); - prtd->pos += snd_pcm_lib_period_bytes(substream); - if (prtd->pos >= snd_pcm_lib_buffer_bytes(substream)) - prtd->pos = 0; + new_pos = prtd->pos + snd_pcm_lib_period_bytes(substream); + if (new_pos >= snd_pcm_lib_buffer_bytes(substream)) + new_pos = 0; + prtd->pos = new_pos; snd_pcm_period_elapsed(substream); } @@ -174,10 +179,10 @@ static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream) * @substream: PCM substream * @cmd: Trigger command * - * Returns 0 on success, a negative error code otherwise. - * * This function can be used as the PCM trigger callback for dmaengine based PCM * driver implementations. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { @@ -222,6 +227,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_trigger); * * This function is deprecated and should not be used by new drivers, as its * results may be unreliable. + * + * Return: PCM position in frames */ snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream) { @@ -236,10 +243,13 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer_no_residue); * * This function can be used as the PCM pointer callback for dmaengine based PCM * driver implementations. + * + * Return: PCM position in frames */ snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream) { struct dmaengine_pcm_runtime_data *prtd = substream_to_prtd(substream); + struct snd_pcm_runtime *runtime = substream->runtime; struct dma_tx_state state; enum dma_status status; unsigned int buf_size; @@ -250,9 +260,12 @@ snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream) buf_size = snd_pcm_lib_buffer_bytes(substream); if (state.residue > 0 && state.residue <= buf_size) pos = buf_size - state.residue; + + runtime->delay = bytes_to_frames(runtime, + state.in_flight_bytes); } - return bytes_to_frames(substream->runtime, pos); + return bytes_to_frames(runtime, pos); } EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer); @@ -261,9 +274,9 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer); * @filter_fn: Filter function used to request the DMA channel * @filter_data: Data passed to the DMA filter function * - * Returns NULL or the requested DMA channel. - * * This function request a DMA channel for usage with dmaengine PCM. + * + * Return: NULL or the requested DMA channel */ struct dma_chan *snd_dmaengine_pcm_request_channel(dma_filter_fn filter_fn, void *filter_data) @@ -283,11 +296,11 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_request_channel); * @substream: PCM substream * @chan: DMA channel to use for data transfers * - * Returns 0 on success, a negative error code otherwise. - * * The function should usually be called from the pcm open callback. Note that * this function will use private_data field of the substream's runtime. So it * is not available to your pcm driver implementation. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, struct dma_chan *chan) @@ -321,12 +334,12 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open); * @filter_fn: Filter function used to request the DMA channel * @filter_data: Data passed to the DMA filter function * - * Returns 0 on success, a negative error code otherwise. - * * This function will request a DMA channel using the passed filter function and * data. The function should usually be called from the pcm open callback. Note * that this function will use private_data field of the substream's runtime. So * it is not available to your pcm driver implementation. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream, dma_filter_fn filter_fn, void *filter_data) @@ -339,6 +352,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open_request_chan); /** * snd_dmaengine_pcm_close - Close a dmaengine based PCM substream * @substream: PCM substream + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream) { @@ -352,10 +367,13 @@ int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream) EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close); /** - * snd_dmaengine_pcm_release_chan_close - Close a dmaengine based PCM substream and release channel + * snd_dmaengine_pcm_close_release_chan - Close a dmaengine based PCM + * substream and release channel * @substream: PCM substream * * Releases the DMA channel associated with the PCM substream. + * + * Return: zero if successful, or a negative error code */ int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream) { @@ -376,10 +394,10 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close_release_chan); * @hw: PCM hw params * @chan: DMA channel to use for data transfers * - * Returns 0 on success, a negative error code otherwise. - * * This function will query DMA capability, then refine the pcm hardware * parameters. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_refine_runtime_hwparams( struct snd_pcm_substream *substream, @@ -426,7 +444,7 @@ int snd_dmaengine_pcm_refine_runtime_hwparams( * default assumption is that it supports 1, 2 and 4 bytes * widths. */ - for (i = SNDRV_PCM_FORMAT_FIRST; i <= SNDRV_PCM_FORMAT_LAST; i++) { + pcm_for_each_format(i) { int bits = snd_pcm_format_physical_width(i); /* |