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| author | Jose Abreu <Jose.Abreu@synopsys.com> | 2016-04-05 18:08:02 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-04-05 11:57:54 -0700 |
| commit | 613c7c4003c8338a9a638485d95de2775948295b (patch) | |
| tree | 52320549b8663703f34afb7596cc61b14b73ca7d /sound | |
| parent | f55532a0c0b8bb6148f4e07853b876ef73bc69ca (diff) | |
| download | linux-613c7c4003c8338a9a638485d95de2775948295b.tar.gz linux-613c7c4003c8338a9a638485d95de2775948295b.tar.bz2 linux-613c7c4003c8338a9a638485d95de2775948295b.zip | |
ASoC: dwc: Unmask I2S interrupts only for enabled channels
There is no need to unmask all interrupts at I2S start. This
can cause performance issues in slower platforms.
Unmask only the interrupts for the used channels.
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/dwc/designware_i2s.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c index bff258d7bcea..3effcd1a7df8 100644 --- a/sound/soc/dwc/designware_i2s.c +++ b/sound/soc/dwc/designware_i2s.c @@ -147,17 +147,18 @@ static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream) static void i2s_start(struct dw_i2s_dev *dev, struct snd_pcm_substream *substream) { + struct i2s_clk_config_data *config = &dev->config; u32 i, irq; i2s_write_reg(dev->i2s_base, IER, 1); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { - for (i = 0; i < 4; i++) { + for (i = 0; i < (config->chan_nr / 2); i++) { irq = i2s_read_reg(dev->i2s_base, IMR(i)); i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x30); } i2s_write_reg(dev->i2s_base, ITER, 1); } else { - for (i = 0; i < 4; i++) { + for (i = 0; i < (config->chan_nr / 2); i++) { irq = i2s_read_reg(dev->i2s_base, IMR(i)); i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03); } |