Quoting Srinivasa Rao Mandadapu (2022-02-24 07:33:45)
> diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
> index 198f27c..b3af971 100644
> --- a/sound/soc/qcom/lpass-platform.c
> +++ b/sound/soc/qcom/lpass-platform.c
> @@ -684,6 +953,17 @@ static irqreturn_t lpass_dma_interrupt_handler(
> reg = LPAIF_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST);
> val = 0;
> break;
> + case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9:
> + case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8:
> + map = drvdata->rxtx_lpaif_map;
> + reg = LPAIF_RXTX_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST);
> + val = 0;
> + break;
> + case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX8:
> + map = drvdata->va_lpaif_map;
> + reg = LPAIF_VA_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST);
> + val = 0;
> + break;
These breaks have the wrong indentation.
> default:
> dev_err(soc_runtime->dev, "%s: invalid %d interface\n", __func__, dai_id);
> return -EINVAL;
> @@ -791,16 +1071,115 @@ static irqreturn_t lpass_platform_hdmiif_irq(int irq, void *data)
> return rv;
> }
> }
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t lpass_platform_rxtxif_irq(int irq, void *data)
> +{
> + struct lpass_data *drvdata = data;
> + struct lpass_variant *v = drvdata->variant;
> + unsigned int irqs;
> + irqreturn_t rv;
> + int chan;
> +
> + rv = regmap_read(drvdata->rxtx_lpaif_map,
> + LPAIF_RXTX_IRQSTAT_REG(v, LPAIF_IRQ_PORT_HOST), &irqs);
> +
> + /* Handle per channel interrupts */
> + for (chan = 0; chan < LPASS_MAX_CDC_DMA_CHANNELS; chan++) {
> + if (irqs & LPAIF_IRQ_ALL(chan) && drvdata->rxtx_substream[chan]) {
> + rv = lpass_dma_interrupt_handler(
> + drvdata->rxtx_substream[chan],
> + drvdata, chan, irqs);
> + if (rv != IRQ_HANDLED)
> + return rv;
> + }
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t lpass_platform_vaif_irq(int irq, void *data)
> +{
> + struct lpass_data *drvdata = data;
> + struct lpass_variant *v = drvdata->variant;
> + unsigned int irqs;
> + irqreturn_t rv;
> + int chan;
> +
> + rv = regmap_read(drvdata->va_lpaif_map,
> + LPAIF_VA_IRQSTAT_REG(v, LPAIF_IRQ_PORT_HOST), &irqs);
>
> + /* Handle per channel interrupts */
> + for (chan = 0; chan < LPASS_MAX_VA_CDC_DMA_CHANNELS; chan++) {
> + if (irqs & LPAIF_IRQ_ALL(chan) && drvdata->va_substream[chan]) {
> + rv = lpass_dma_interrupt_handler(
> + drvdata->va_substream[chan],
> + drvdata, chan, irqs);
> + if (rv != IRQ_HANDLED)
> + return rv;
> + }
> + }
> return IRQ_HANDLED;
> }
>
> +static int lpass_platform_prealloc_cdc_dma_buffer(struct snd_soc_component *component,
> + struct snd_pcm *pcm, int dai_id)
> +{
> + struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
> + struct snd_pcm_substream *substream;
> + struct snd_dma_buffer *buf;
> +
> + if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream)
> + substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
> + else
> + substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
> +
> + buf = &substream->dma_buffer;
> + buf->dev.dev = pcm->card->dev;
> + buf->private_data = NULL;
> +
> + /* Assign Codec DMA buffer pointers */
> + buf->dev.type = SNDRV_DMA_TYPE_CONTINUOUS;
> +
> + switch (dai_id) {
> + case LPASS_CDC_DMA_RX0 ... LPASS_CDC_DMA_RX9:
> + buf->bytes = lpass_platform_rxtx_hardware.buffer_bytes_max;
> + buf->addr = drvdata->rxtx_cdc_dma_lpm_buf;
> + break;
> + case LPASS_CDC_DMA_TX0 ... LPASS_CDC_DMA_TX8:
> + buf->bytes = lpass_platform_rxtx_hardware.buffer_bytes_max;
> + buf->addr = drvdata->rxtx_cdc_dma_lpm_buf + LPASS_RXTX_CDC_DMA_LPM_BUFF_SIZE;
> + break;
> + case LPASS_CDC_DMA_VA_TX0 ... LPASS_CDC_DMA_VA_TX8:
> + buf->bytes = lpass_platform_va_hardware.buffer_bytes_max;
> + buf->addr = drvdata->va_cdc_dma_lpm_buf;
> + break;
> + default:
> + break;
> + }
> +
> + buf->area = (unsigned char * __force)memremap(buf->addr, buf->bytes, MEMREMAP_WT);
What's the cast and __force for now? MEMREMAP_WT is almost never used so
this looks wrong. Why can't MEMREMAP_WC be used? But if it's DMA then
why isn't dma_map_resource() being used?
> +
> + return 0;
> +}
> +
> static int lpass_platform_pcm_new(struct snd_soc_component *component,
> struct snd_soc_pcm_runtime *soc_runtime)
> {
> struct snd_pcm *pcm = soc_runtime->pcm;
> + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
> + unsigned int dai_id = cpu_dai->driver->id;
> +
> size_t size = lpass_platform_pcm_hardware.buffer_bytes_max;
>
> + /*
> + * Lpass codec dma can access only lpass lpm hardware memory.
> + * ioremap is for HLOS to access hardware memory.
> + */
> + if (is_cdc_dma_port(dai_id))
> + return lpass_platform_prealloc_cdc_dma_buffer(component, pcm, dai_id);
> +
> return snd_pcm_set_fixed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
> component->dev, size);
> }
