The patch
ASoC: dwc: Add helper functions to disable/enable irqs
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
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Thanks, Mark
From df4e7be1832a1ca9fccfb2ed8771a17da6f7fa57 Mon Sep 17 00:00:00 2001
From: Jose Abreu Jose.Abreu@synopsys.com Date: Mon, 23 May 2016 11:02:22 +0100 Subject: [PATCH] ASoC: dwc: Add helper functions to disable/enable irqs
Helper functions to disable and enable the I2S interrupts were added. Only the interrupts of the used channels are enabled.
Also, there is no need to enable irqs at dw_i2s_config(), they are already enabled at startup.
Signed-off-by: Jose Abreu joabreu@synopsys.com Cc: Carlos Palminha palminha@synopsys.com Cc: Mark Brown broonie@kernel.org Cc: Liam Girdwood lgirdwood@gmail.com Cc: Jaroslav Kysela perex@perex.cz Cc: Takashi Iwai tiwai@suse.com Cc: Rob Herring robh@kernel.org Cc: Alexey Brodkin abrodkin@synopsys.com Cc: linux-snps-arc@lists.infradead.org Cc: alsa-devel@alsa-project.org Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/dwc/designware_i2s.c | 68 +++++++++++++++++++++++++----------------- 1 file changed, 41 insertions(+), 27 deletions(-)
diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c index 0db69b7e9617..4c4f0dc24f10 100644 --- a/sound/soc/dwc/designware_i2s.c +++ b/sound/soc/dwc/designware_i2s.c @@ -145,26 +145,54 @@ 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) +static inline void i2s_disable_irqs(struct dw_i2s_dev *dev, u32 stream, + int chan_nr) { - 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 < (config->chan_nr / 2); i++) { + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30); + } + } else { + for (i = 0; i < (chan_nr / 2); i++) { + irq = i2s_read_reg(dev->i2s_base, IMR(i)); + i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03); + } + } +} + +static inline void i2s_enable_irqs(struct dw_i2s_dev *dev, u32 stream, + int chan_nr) +{ + u32 i, irq; + + if (stream == SNDRV_PCM_STREAM_PLAYBACK) { + for (i = 0; i < (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 < (config->chan_nr / 2); i++) { + for (i = 0; i < (chan_nr / 2); i++) { irq = i2s_read_reg(dev->i2s_base, IMR(i)); i2s_write_reg(dev->i2s_base, IMR(i), irq & ~0x03); } - i2s_write_reg(dev->i2s_base, IRER, 1); } +} + +static void i2s_start(struct dw_i2s_dev *dev, + struct snd_pcm_substream *substream) +{ + struct i2s_clk_config_data *config = &dev->config; + + i2s_write_reg(dev->i2s_base, IER, 1); + i2s_enable_irqs(dev, substream->stream, config->chan_nr); + + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) + i2s_write_reg(dev->i2s_base, ITER, 1); + else + i2s_write_reg(dev->i2s_base, IRER, 1);
i2s_write_reg(dev->i2s_base, CER, 1); } @@ -172,24 +200,14 @@ static void i2s_start(struct dw_i2s_dev *dev, static void i2s_stop(struct dw_i2s_dev *dev, struct snd_pcm_substream *substream) { - u32 i = 0, irq;
i2s_clear_irqs(dev, substream->stream); - if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) i2s_write_reg(dev->i2s_base, ITER, 0); - - for (i = 0; i < 4; i++) { - irq = i2s_read_reg(dev->i2s_base, IMR(i)); - i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30); - } - } else { + else i2s_write_reg(dev->i2s_base, IRER, 0);
- for (i = 0; i < 4; i++) { - irq = i2s_read_reg(dev->i2s_base, IMR(i)); - i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03); - } - } + i2s_disable_irqs(dev, substream->stream, 8);
if (!dev->active) { i2s_write_reg(dev->i2s_base, CER, 0); @@ -223,7 +241,7 @@ static int dw_i2s_startup(struct snd_pcm_substream *substream,
static void dw_i2s_config(struct dw_i2s_dev *dev, int stream) { - u32 ch_reg, irq; + u32 ch_reg; struct i2s_clk_config_data *config = &dev->config;
@@ -235,16 +253,12 @@ static void dw_i2s_config(struct dw_i2s_dev *dev, int stream) dev->xfer_resolution); i2s_write_reg(dev->i2s_base, TFCR(ch_reg), dev->fifo_th - 1); - irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg)); - i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x30); i2s_write_reg(dev->i2s_base, TER(ch_reg), 1); } else { i2s_write_reg(dev->i2s_base, RCR(ch_reg), dev->xfer_resolution); i2s_write_reg(dev->i2s_base, RFCR(ch_reg), dev->fifo_th - 1); - irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg)); - i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x03); i2s_write_reg(dev->i2s_base, RER(ch_reg), 1); }