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ASoC: meson: axg-fifo: add NO_PERIOD_WAKEUP support 

On the AXG family, the fifo irq is not necessary for the HW to operate.
It is just used to notify that a period has elapsed. If userpace does not
care for these wakeups (such as pipewire), we are just wasting CPU cycles.

Add support for NO_PERIOD_WAKEUP and disable irq when they are no needed.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20210407145914.311479-1-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jerome Brunet 2021-04-07 16:59:14 +02:00 committed by Mark Brown
parent fa74c223b6
commit 9be701ec34
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 5 deletions
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11
sound/soc/meson/axg-fifo.c
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@ -27,8 +27,8 @@ static struct snd_pcm_hardware axg_fifo_hw = {
SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_PAUSE),
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP),
.formats = AXG_FIFO_FORMATS,
.rate_min = 5512,
.rate_max = 192000,
@ -113,7 +113,7 @@ int axg_fifo_pcm_hw_params(struct snd_soc_component *component,
{
struct snd_pcm_runtime *runtime = ss->runtime;
struct axg_fifo *fifo = axg_fifo_data(ss);
unsigned int burst_num, period, threshold;
unsigned int burst_num, period, threshold, irq_en;
dma_addr_t end_ptr;
period = params_period_bytes(params);
@ -142,10 +142,11 @@ int axg_fifo_pcm_hw_params(struct snd_soc_component *component,
regmap_field_write(fifo->field_threshold,
threshold ? threshold - 1 : 0);
/* Enable block count irq */
/* Enable irq if necessary */
irq_en = runtime->no_period_wakeup ? 0 : FIFO_INT_COUNT_REPEAT;
regmap_update_bits(fifo->map, FIFO_CTRL0,
CTRL0_INT_EN(FIFO_INT_COUNT_REPEAT),
CTRL0_INT_EN(FIFO_INT_COUNT_REPEAT));
CTRL0_INT_EN(irq_en));
return 0;
}