This patch adds ablity to lpass driver to handle interrupt per dma
channel. Without this patch its not possible to use multipl ports on the
lpass.
Signed-off-by: Srinivas Kandagatla <srinivas.kandaga...@linaro.org>
---
sound/soc/qcom/lpass-platform.c | 89 +++++++++++++++++++++++++----------------
sound/soc/qcom/lpass.h | 4 ++
2 files changed, 58 insertions(+), 35 deletions(-)
diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
index 8ab0ac1..c5907d5 100644
--- a/sound/soc/qcom/lpass-platform.c
+++ b/sound/soc/qcom/lpass-platform.c
@@ -356,27 +356,15 @@ static struct snd_pcm_ops lpass_platform_pcm_ops = {
.mmap = lpass_platform_pcmops_mmap,
};
-static irqreturn_t lpass_platform_lpaif_irq(int irq, void *data)
+static irqreturn_t lpass_dma_interrupt_handler(
+ struct snd_pcm_substream *substream,
+ struct lpass_data *drvdata,
+ int chan, u32 interrupts)
{
- struct snd_pcm_substream *substream = data;
struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
- struct lpass_data *drvdata =
- snd_soc_platform_get_drvdata(soc_runtime->platform);
struct lpass_variant *v = drvdata->variant;
- struct lpass_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(soc_runtime);
- unsigned int interrupts;
irqreturn_t ret = IRQ_NONE;
- int rv, chan = pcm_data->rdma_ch;
-
- rv = regmap_read(drvdata->lpaif_map,
- LPAIF_IRQSTAT_REG(v, LPAIF_IRQ_PORT_HOST), &interrupts);
- if (rv) {
- dev_err(soc_runtime->dev, "%s() error reading from irqstat reg:
%d\n",
- __func__, rv);
- return IRQ_NONE;
- }
-
- interrupts &= LPAIF_IRQ_ALL(chan);
+ int rv;
if (interrupts & LPAIF_IRQ_PER(chan)) {
rv = regmap_write(drvdata->lpaif_map,
@@ -422,6 +410,30 @@ static irqreturn_t lpass_platform_lpaif_irq(int irq, void
*data)
return ret;
}
+static irqreturn_t lpass_platform_lpaif_irq(int irq, void *data)
+{
+ struct lpass_data *drvdata = data;
+ struct lpass_variant *v = drvdata->variant;
+ unsigned int irqs;
+ int rv, chan;
+
+ rv = regmap_read(drvdata->lpaif_map,
+ LPAIF_IRQSTAT_REG(v, LPAIF_IRQ_PORT_HOST), &irqs);
+ if (rv) {
+ pr_err("%s() error reading from irqstat reg: %d\n",
+ __func__, rv);
+ return IRQ_NONE;
+ }
+
+ /* Handle per channel interrupts */
+ for (chan = 0; chan < LPASS_MAX_DMA_CHANNELS; chan++)
+ if (irqs & LPAIF_IRQ_ALL(chan) && drvdata->substream[chan])
+ lpass_dma_interrupt_handler(drvdata->substream[chan],
+ drvdata, chan, irqs);
+
+ return IRQ_HANDLED;
+}
+
static int lpass_platform_alloc_buffer(struct snd_pcm_substream *substream,
struct snd_soc_pcm_runtime *soc_runtime)
{
@@ -477,6 +489,7 @@ static int lpass_platform_pcm_new(struct
snd_soc_pcm_runtime *soc_runtime)
if (IS_ERR_VALUE(data->rdma_ch))
return data->rdma_ch;
+ drvdata->substream[data->rdma_ch] = substream;
data->i2s_port = cpu_dai->driver->id;
snd_soc_pcm_set_drvdata(soc_runtime, data);
@@ -488,29 +501,12 @@ static int lpass_platform_pcm_new(struct
snd_soc_pcm_runtime *soc_runtime)
if (ret)
return ret;
- ret = devm_request_irq(soc_runtime->dev, drvdata->lpaif_irq,
- lpass_platform_lpaif_irq, IRQF_TRIGGER_RISING,
- "lpass-irq-lpaif", substream);
- if (ret) {
- dev_err(soc_runtime->dev, "%s() irq request failed: %d\n",
- __func__, ret);
- goto err_buf;
- }
-
- /* ensure audio hardware is disabled */
- ret = regmap_write(drvdata->lpaif_map,
- LPAIF_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST), 0);
- if (ret) {
- dev_err(soc_runtime->dev, "%s() error writing to irqen reg:
%d\n",
- __func__, ret);
- return ret;
- }
ret = regmap_write(drvdata->lpaif_map,
LPAIF_RDMACTL_REG(v, data->rdma_ch), 0);
if (ret) {
dev_err(soc_runtime->dev, "%s() error writing to rdmactl reg:
%d\n",
__func__, ret);
- return ret;
+ goto err_buf;
}
return 0;
@@ -530,6 +526,8 @@ static void lpass_platform_pcm_free(struct snd_pcm *pcm)
struct lpass_pcm_data *data = snd_soc_pcm_get_drvdata(soc_runtime);
struct lpass_variant *v = drvdata->variant;
+ drvdata->substream[data->rdma_ch] = NULL;
+
if (v->free_dma_channel)
v->free_dma_channel(drvdata, data->rdma_ch);
@@ -545,6 +543,8 @@ static struct snd_soc_platform_driver lpass_platform_driver
= {
int asoc_qcom_lpass_platform_register(struct platform_device *pdev)
{
struct lpass_data *drvdata = platform_get_drvdata(pdev);
+ struct lpass_variant *v = drvdata->variant;
+ int ret;
drvdata->lpaif_irq = platform_get_irq_byname(pdev, "lpass-irq-lpaif");
if (drvdata->lpaif_irq < 0) {
@@ -553,6 +553,25 @@ int asoc_qcom_lpass_platform_register(struct
platform_device *pdev)
return -ENODEV;
}
+ ret = devm_request_irq(&pdev->dev, drvdata->lpaif_irq,
+ lpass_platform_lpaif_irq, IRQF_TRIGGER_RISING,
+ "lpass-irq-lpaif", drvdata);
+ if (ret) {
+ dev_err(&pdev->dev, "%s() irq request failed: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ /* ensure audio hardware is disabled */
+ ret = regmap_write(drvdata->lpaif_map,
+ LPAIF_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST), 0);
+ if (ret) {
+ dev_err(&pdev->dev, "%s() error writing to irqen reg: %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+
return devm_snd_soc_register_platform(&pdev->dev,
&lpass_platform_driver);
}
diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h
index e07ed52..c3016fe 100644
--- a/sound/soc/qcom/lpass.h
+++ b/sound/soc/qcom/lpass.h
@@ -23,6 +23,7 @@
#define LPASS_AHBIX_CLOCK_FREQUENCY 131072000
#define LPASS_MAX_MI2S_PORTS (4)
+#define LPASS_MAX_DMA_CHANNELS (8)
/* Both the CPU DAI and platform drivers will access this data */
struct lpass_data {
@@ -47,6 +48,9 @@ struct lpass_data {
/* SOC specific variations in the LPASS IP integration */
struct lpass_variant *variant;
+
+ /* used it for handling interrupt per dma channel */
+ struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS];
};
/* Vairant data per each SOC */
--
1.9.1
--
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