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 --- sound/soc/meson/axg-fifo.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/sound/soc/meson/axg-fifo.c b/sound/soc/meson/axg-fifo.c index b2e867113226..b9af2d513e09 100644 --- a/sound/soc/meson/axg-fifo.c +++ b/sound/soc/meson/axg-fifo.c @@ -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; }