Applied "ASoC: rt5514: Support the DSP recording continuously after the hotwording triggered" to the asoc tree

Message ID E1dX8Wk-0004sy-CZ@debutante
State Accepted
Commit 173f4612690ac569d9f912a31aa69af15b84047c
Headers show

Commit Message

Mark Brown July 17, 2017, 4:05 p.m.
The patch

   ASoC: rt5514: Support the DSP recording continuously after the hotwording triggered

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 173f4612690ac569d9f912a31aa69af15b84047c Mon Sep 17 00:00:00 2001
From: "oder_chiou@realtek.com" <oder_chiou@realtek.com>

Date: Thu, 13 Jul 2017 19:42:20 +0800
Subject: [PATCH] ASoC: rt5514: Support the DSP recording continuously after
 the hotwording triggered

The patch uses the IRQ to copy the PCM data to userspace continuously after
the hotwording triggered from DSP.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>

Signed-off-by: Mark Brown <broonie@kernel.org>

---
 sound/soc/codecs/rt5514-spi.c | 139 ++++++++++++++++++++++--------------------
 sound/soc/codecs/rt5514-spi.h |   7 +--
 2 files changed, 76 insertions(+), 70 deletions(-)

-- 
2.13.2

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Patch

diff --git a/sound/soc/codecs/rt5514-spi.c b/sound/soc/codecs/rt5514-spi.c
index 7ed62e8c80b4..950d1ffdc06c 100644
--- a/sound/soc/codecs/rt5514-spi.c
+++ b/sound/soc/codecs/rt5514-spi.c
@@ -43,9 +43,7 @@  struct rt5514_dsp {
 	struct mutex dma_lock;
 	struct snd_pcm_substream *substream;
 	unsigned int buf_base, buf_limit, buf_rp;
-	size_t buf_size;
-	size_t dma_offset;
-	size_t dsp_offset;
+	size_t buf_size, get_size, dma_offset;
 };
 
 static const struct snd_pcm_hardware rt5514_spi_pcm_hardware = {
@@ -80,6 +78,8 @@  static void rt5514_spi_copy_work(struct work_struct *work)
 		container_of(work, struct rt5514_dsp, copy_work.work);
 	struct snd_pcm_runtime *runtime;
 	size_t period_bytes, truncated_bytes = 0;
+	unsigned int cur_wp, remain_data;
+	u8 buf[8];
 
 	mutex_lock(&rt5514_dsp->dma_lock);
 	if (!rt5514_dsp->substream) {
@@ -90,8 +90,24 @@  static void rt5514_spi_copy_work(struct work_struct *work)
 	runtime = rt5514_dsp->substream->runtime;
 	period_bytes = snd_pcm_lib_period_bytes(rt5514_dsp->substream);
 
-	if (rt5514_dsp->buf_size - rt5514_dsp->dsp_offset <  period_bytes)
-		period_bytes = rt5514_dsp->buf_size - rt5514_dsp->dsp_offset;
+	if (rt5514_dsp->get_size >= rt5514_dsp->buf_size) {
+		rt5514_spi_burst_read(RT5514_BUFFER_VOICE_WP, (u8 *)&buf,
+			sizeof(buf));
+		cur_wp = buf[0] | buf[1] << 8 | buf[2] << 16 |
+					buf[3] << 24;
+
+		if (cur_wp >= rt5514_dsp->buf_rp)
+			remain_data = (cur_wp - rt5514_dsp->buf_rp);
+		else
+			remain_data =
+				(rt5514_dsp->buf_limit - rt5514_dsp->buf_rp) +
+				(cur_wp - rt5514_dsp->buf_base);
+
+		if (remain_data < period_bytes) {
+			schedule_delayed_work(&rt5514_dsp->copy_work, 5);
+			goto done;
+		}
+	}
 
 	if (rt5514_dsp->buf_rp + period_bytes <= rt5514_dsp->buf_limit) {
 		rt5514_spi_burst_read(rt5514_dsp->buf_rp,
@@ -112,24 +128,58 @@  static void rt5514_spi_copy_work(struct work_struct *work)
 			runtime->dma_area + rt5514_dsp->dma_offset +
 			truncated_bytes, period_bytes - truncated_bytes);
 
-			rt5514_dsp->buf_rp = rt5514_dsp->buf_base +
-				period_bytes - truncated_bytes;
+		rt5514_dsp->buf_rp = rt5514_dsp->buf_base + period_bytes -
+			truncated_bytes;
 	}
 
+	rt5514_dsp->get_size += period_bytes;
 	rt5514_dsp->dma_offset += period_bytes;
 	if (rt5514_dsp->dma_offset >= runtime->dma_bytes)
 		rt5514_dsp->dma_offset = 0;
 
-	rt5514_dsp->dsp_offset += period_bytes;
-
 	snd_pcm_period_elapsed(rt5514_dsp->substream);
 
-	if (rt5514_dsp->dsp_offset < rt5514_dsp->buf_size)
-		schedule_delayed_work(&rt5514_dsp->copy_work, 5);
+	schedule_delayed_work(&rt5514_dsp->copy_work, 5);
+
 done:
 	mutex_unlock(&rt5514_dsp->dma_lock);
 }
 
+static irqreturn_t rt5514_spi_irq(int irq, void *data)
+{
+	struct rt5514_dsp *rt5514_dsp = data;
+	u8 buf[8];
+
+	rt5514_dsp->get_size = 0;
+	rt5514_dsp->dma_offset = 0;
+
+	/**
+	 * The address area x1800XXXX is the register address, and it cannot
+	 * support spi burst read perfectly. So we use the spi burst read
+	 * individually to make sure the data correctly.
+	 */
+	rt5514_spi_burst_read(RT5514_BUFFER_VOICE_BASE, (u8 *)&buf,
+		sizeof(buf));
+	rt5514_dsp->buf_base = buf[0] | buf[1] << 8 | buf[2] << 16 |
+				buf[3] << 24;
+
+	rt5514_spi_burst_read(RT5514_BUFFER_VOICE_LIMIT, (u8 *)&buf,
+		sizeof(buf));
+	rt5514_dsp->buf_limit = buf[0] | buf[1] << 8 | buf[2] << 16 |
+				buf[3] << 24;
+
+	rt5514_spi_burst_read(RT5514_BUFFER_VOICE_WP, (u8 *)&buf,
+		sizeof(buf));
+	rt5514_dsp->buf_rp = buf[0] | buf[1] << 8 | buf[2] << 16 |
+				buf[3] << 24;
+
+	rt5514_dsp->buf_size = rt5514_dsp->buf_limit - rt5514_dsp->buf_base;
+
+	schedule_delayed_work(&rt5514_dsp->copy_work, 0);
+
+	return IRQ_HANDLED;
+}
+
 /* PCM for streaming audio from the DSP buffer */
 static int rt5514_spi_pcm_open(struct snd_pcm_substream *substream)
 {
@@ -170,59 +220,6 @@  static int rt5514_spi_hw_free(struct snd_pcm_substream *substream)
 	return snd_pcm_lib_free_vmalloc_buffer(substream);
 }
 
-static int rt5514_spi_prepare(struct snd_pcm_substream *substream)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct rt5514_dsp *rt5514_dsp =
-			snd_soc_platform_get_drvdata(rtd->platform);
-	u8 buf[8];
-
-	rt5514_dsp->dma_offset = 0;
-	rt5514_dsp->dsp_offset = 0;
-
-	/**
-	 * The address area x1800XXXX is the register address, and it cannot
-	 * support spi burst read perfectly. So we use the spi burst read
-	 * individually to make sure the data correctly.
-	*/
-	rt5514_spi_burst_read(RT5514_BUFFER_VOICE_BASE, (u8 *)&buf,
-		sizeof(buf));
-	rt5514_dsp->buf_base = buf[0] | buf[1] << 8 | buf[2] << 16 |
-				buf[3] << 24;
-
-	rt5514_spi_burst_read(RT5514_BUFFER_VOICE_LIMIT, (u8 *)&buf,
-		sizeof(buf));
-	rt5514_dsp->buf_limit = buf[0] | buf[1] << 8 | buf[2] << 16 |
-				buf[3] << 24;
-
-	rt5514_spi_burst_read(RT5514_BUFFER_VOICE_RP, (u8 *)&buf,
-		sizeof(buf));
-	rt5514_dsp->buf_rp = buf[0] | buf[1] << 8 | buf[2] << 16 |
-				buf[3] << 24;
-
-	rt5514_spi_burst_read(RT5514_BUFFER_VOICE_SIZE, (u8 *)&buf,
-		sizeof(buf));
-	rt5514_dsp->buf_size = buf[0] | buf[1] << 8 | buf[2] << 16 |
-				buf[3] << 24;
-
-	return 0;
-}
-
-static int rt5514_spi_trigger(struct snd_pcm_substream *substream, int cmd)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct rt5514_dsp *rt5514_dsp =
-			snd_soc_platform_get_drvdata(rtd->platform);
-
-	if (cmd == SNDRV_PCM_TRIGGER_START) {
-		if (rt5514_dsp->buf_base && rt5514_dsp->buf_limit &&
-			rt5514_dsp->buf_rp && rt5514_dsp->buf_size)
-			schedule_delayed_work(&rt5514_dsp->copy_work, 0);
-	}
-
-	return 0;
-}
-
 static snd_pcm_uframes_t rt5514_spi_pcm_pointer(
 		struct snd_pcm_substream *substream)
 {
@@ -238,8 +235,6 @@  static const struct snd_pcm_ops rt5514_spi_pcm_ops = {
 	.open		= rt5514_spi_pcm_open,
 	.hw_params	= rt5514_spi_hw_params,
 	.hw_free	= rt5514_spi_hw_free,
-	.trigger	= rt5514_spi_trigger,
-	.prepare	= rt5514_spi_prepare,
 	.pointer	= rt5514_spi_pcm_pointer,
 	.mmap		= snd_pcm_lib_mmap_vmalloc,
 	.page		= snd_pcm_lib_get_vmalloc_page,
@@ -248,6 +243,7 @@  static const struct snd_pcm_ops rt5514_spi_pcm_ops = {
 static int rt5514_spi_pcm_probe(struct snd_soc_platform *platform)
 {
 	struct rt5514_dsp *rt5514_dsp;
+	int ret;
 
 	rt5514_dsp = devm_kzalloc(platform->dev, sizeof(*rt5514_dsp),
 			GFP_KERNEL);
@@ -257,6 +253,17 @@  static int rt5514_spi_pcm_probe(struct snd_soc_platform *platform)
 	INIT_DELAYED_WORK(&rt5514_dsp->copy_work, rt5514_spi_copy_work);
 	snd_soc_platform_set_drvdata(platform, rt5514_dsp);
 
+	if (rt5514_spi->irq) {
+		ret = devm_request_threaded_irq(&rt5514_spi->dev,
+			rt5514_spi->irq, NULL, rt5514_spi_irq,
+			IRQF_TRIGGER_RISING | IRQF_ONESHOT, "rt5514-spi",
+			rt5514_dsp);
+		if (ret)
+			dev_err(&rt5514_spi->dev,
+				"%s Failed to reguest IRQ: %d\n", __func__,
+				ret);
+	}
+
 	return 0;
 }
 
diff --git a/sound/soc/codecs/rt5514-spi.h b/sound/soc/codecs/rt5514-spi.h
index f69b1cdf2f9b..a6434ee6ff03 100644
--- a/sound/soc/codecs/rt5514-spi.h
+++ b/sound/soc/codecs/rt5514-spi.h
@@ -17,10 +17,9 @@ 
 */
 #define RT5514_SPI_BUF_LEN		240
 
-#define RT5514_BUFFER_VOICE_BASE	0x18001034
-#define RT5514_BUFFER_VOICE_LIMIT	0x18001038
-#define RT5514_BUFFER_VOICE_RP		0x1800103c
-#define RT5514_BUFFER_VOICE_SIZE	0x18001040
+#define RT5514_BUFFER_VOICE_BASE	0x18000200
+#define RT5514_BUFFER_VOICE_LIMIT	0x18000204
+#define RT5514_BUFFER_VOICE_WP		0x1800020c
 
 /* SPI Command */
 enum {