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ASoC: soc-generic-dmaengine-pcm: Use default config when none is given 

snd_dmaengine_pcm_register() can be passed a NULL pointer for the config
which means that the we have to test for pcm->config being non NULL
before accessing it. Make the code more straight forward by providing a
default config when none is passed. With this pcm->config is never NULL
and we can skip all the if (pcm->config) tests.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20220502131335.2604158-1-s.hauer@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sascha Hauer 2022-05-02 15:13:35 +02:00 committed by Mark Brown
parent f80beaf6f2
commit 43556516ff
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 25 additions and 32 deletions
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57
sound/soc/soc-generic-dmaengine-pcm.c
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@ -79,29 +79,19 @@ static int dmaengine_pcm_hw_params(struct snd_soc_component *component,
{
struct dmaengine_pcm *pcm = soc_component_to_pcm(component);
struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
int (*prepare_slave_config)(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct dma_slave_config *slave_config);
struct dma_slave_config slave_config;
int ret;
if (!pcm->config->prepare_slave_config)
return 0;
memset(&slave_config, 0, sizeof(slave_config));
if (!pcm->config)
prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config;
else
prepare_slave_config = pcm->config->prepare_slave_config;
ret = pcm->config->prepare_slave_config(substream, params, &slave_config);
if (ret)
return ret;
if (prepare_slave_config) {
int ret = prepare_slave_config(substream, params, &slave_config);
if (ret)
return ret;
ret = dmaengine_slave_config(chan, &slave_config);
if (ret)
return ret;
}
return 0;
return dmaengine_slave_config(chan, &slave_config);
}
static int
@ -121,7 +111,7 @@ dmaengine_pcm_set_runtime_hwparams(struct snd_soc_component *component,
return -EINVAL;
}
if (pcm->config && pcm->config->pcm_hardware)
if (pcm->config->pcm_hardware)
return snd_soc_set_runtime_hwparams(substream,
pcm->config->pcm_hardware);
@ -188,7 +178,6 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
{
struct dmaengine_pcm *pcm = soc_component_to_pcm(component);
struct snd_dmaengine_dai_dma_data *dma_data;
dma_filter_fn fn = NULL;
if (rtd->num_cpus > 1) {
dev_err(rtd->dev,
@ -201,13 +190,11 @@ static struct dma_chan *dmaengine_pcm_compat_request_channel(
if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])
return pcm->chan[0];
if (pcm->config && pcm->config->compat_request_channel)
if (pcm->config->compat_request_channel)
return pcm->config->compat_request_channel(rtd, substream);
if (pcm->config)
fn = pcm->config->compat_filter_fn;
return snd_dmaengine_pcm_request_channel(fn, dma_data->filter_data);
return snd_dmaengine_pcm_request_channel(pcm->config->compat_filter_fn,
dma_data->filter_data);
}
static bool dmaengine_pcm_can_report_residue(struct device *dev,
@ -239,12 +226,12 @@ static int dmaengine_pcm_new(struct snd_soc_component *component,
size_t max_buffer_size;
unsigned int i;
if (config && config->prealloc_buffer_size)
if (config->prealloc_buffer_size)
prealloc_buffer_size = config->prealloc_buffer_size;
else
prealloc_buffer_size = prealloc_buffer_size_kbytes * 1024;
if (config && config->pcm_hardware && config->pcm_hardware->buffer_bytes_max)
if (config->pcm_hardware && config->pcm_hardware->buffer_bytes_max)
max_buffer_size = config->pcm_hardware->buffer_bytes_max;
else
max_buffer_size = SIZE_MAX;
@ -254,7 +241,7 @@ static int dmaengine_pcm_new(struct snd_soc_component *component,
if (!substream)
continue;
if (!pcm->chan[i] && config && config->chan_names[i])
if (!pcm->chan[i] && config->chan_names[i])
pcm->chan[i] = dma_request_slave_channel(dev,
config->chan_names[i]);
@ -367,10 +354,10 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
struct dma_chan *chan;
if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_NO_DT) || (!dev->of_node &&
!(config && config->dma_dev && config->dma_dev->of_node)))
!(config->dma_dev && config->dma_dev->of_node)))
return 0;
if (config && config->dma_dev) {
if (config->dma_dev) {
/*
* If this warning is seen, it probably means that your Linux
* device structure does not match your HW device structure.
@ -387,7 +374,7 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
name = "rx-tx";
else
name = dmaengine_pcm_dma_channel_names[i];
if (config && config->chan_names[i])
if (config->chan_names[i])
name = config->chan_names[i];
chan = dma_request_chan(dev, name);
if (IS_ERR(chan)) {
@ -425,6 +412,10 @@ static void dmaengine_pcm_release_chan(struct dmaengine_pcm *pcm)
}
}
static const struct snd_dmaengine_pcm_config snd_dmaengine_pcm_default_config = {
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
};
/**
* snd_dmaengine_pcm_register - Register a dmaengine based PCM device
* @dev: The parent device for the PCM device
@ -445,6 +436,8 @@ int snd_dmaengine_pcm_register(struct device *dev,
#ifdef CONFIG_DEBUG_FS
pcm->component.debugfs_prefix = "dma";
#endif
if (!config)
config = &snd_dmaengine_pcm_default_config;
pcm->config = config;
pcm->flags = flags;
@ -452,7 +445,7 @@ int snd_dmaengine_pcm_register(struct device *dev,
if (ret)
goto err_free_dma;
if (config && config->process)
if (config->process)
driver = &dmaengine_pcm_component_process;
else
driver = &dmaengine_pcm_component;