The patch

ASoC: sun4i-i2s: Implement capture support

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.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From ae73b34f66f629ab1986673e8e069342c09e3168 Mon Sep 17 00:00:00 2001

From: Maxime Ripard maxime.ripard@free-electrons.com Date: Thu, 3 Nov 2016 17:27:05 +0100 Subject: [PATCH] ASoC: sun4i-i2s: Implement capture support

The i2s driver was only implementing playback for now. Implement capture to make sure that's not a limitation anymore.

Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/sunxi/sun4i-i2s.c | 52 ++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 49 insertions(+), 3 deletions(-)

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c index 687a8f83dbe5..a7653114e895 100644 --- a/sound/soc/sunxi/sun4i-i2s.c +++ b/sound/soc/sunxi/sun4i-i2s.c @@ -93,6 +93,7 @@ struct sun4i_i2s { struct clk *mod_clk; struct regmap *regmap;

+ struct snd_dmaengine_dai_dma_data capture_dma_data; struct snd_dmaengine_dai_dma_data playback_dma_data; };

@@ -341,6 +342,27 @@ static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) return 0; }

+static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s) +{ + /* Flush RX FIFO */ + regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG, + SUN4I_I2S_FIFO_CTRL_FLUSH_RX, + SUN4I_I2S_FIFO_CTRL_FLUSH_RX); + + /* Clear RX counter */ + regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0); + + /* Enable RX Block */ + regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG, + SUN4I_I2S_CTRL_RX_EN, + SUN4I_I2S_CTRL_RX_EN); + + /* Enable RX DRQ */ + regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG, + SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN, + SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN); +} + static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s) { /* Flush TX FIFO */ @@ -362,6 +384,18 @@ static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s) SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN); }

+static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s) +{ + /* Disable RX Block */ + regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG, + SUN4I_I2S_CTRL_RX_EN, + 0); + + /* Disable RX DRQ */ + regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG, + SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN, + 0); +}

static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s) { @@ -388,7 +422,7 @@ static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd, if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) sun4i_i2s_start_playback(i2s); else - return -EINVAL; + sun4i_i2s_start_capture(i2s); break;

case SNDRV_PCM_TRIGGER_STOP: @@ -397,7 +431,7 @@ static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd, if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) sun4i_i2s_stop_playback(i2s); else - return -EINVAL; + sun4i_i2s_stop_capture(i2s); break;

default: @@ -459,7 +493,9 @@ static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai) { struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);

- snd_soc_dai_init_dma_data(dai, &i2s->playback_dma_data, NULL); + snd_soc_dai_init_dma_data(dai, + &i2s->playback_dma_data, + &i2s->capture_dma_data);

snd_soc_dai_set_drvdata(dai, i2s);

@@ -468,6 +504,13 @@ static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)

static struct snd_soc_dai_driver sun4i_i2s_dai = { .probe = sun4i_i2s_dai_probe, + .capture = { + .stream_name = "Capture", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_192000, + .formats = SNDRV_PCM_FMTBIT_S16_LE, + }, .playback = { .stream_name = "Playback", .channels_min = 2, @@ -630,6 +673,9 @@ static int sun4i_i2s_probe(struct platform_device *pdev) i2s->playback_dma_data.addr = res->start + SUN4I_I2S_FIFO_TX_REG; i2s->playback_dma_data.maxburst = 4;

+ i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG; + i2s->capture_dma_data.maxburst = 4; + pm_runtime_enable(&pdev->dev); if (!pm_runtime_enabled(&pdev->dev)) { ret = sun4i_i2s_runtime_resume(&pdev->dev);