Re: [PATCH 5/8] ASoC: qcom: Add support for codec dma driver
From: Matthias Kaehlcke
Date: Fri Oct 01 2021 - 12:52:39 EST
On Fri, Oct 01, 2021 at 04:51:29PM +0530, Srinivasa Rao Mandadapu wrote:
> Upadate lpass cpu and platform driver to support audio over codec dma
> in ADSP bypass use case.
>
> Signed-off-by: Venkata Prasad Potturu <potturu@xxxxxxxxxxxxxx>
> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@xxxxxxxxxxxxxx>
> ---
> sound/soc/qcom/lpass-cpu.c | 312 ++++++++++++++++++++++++-
> sound/soc/qcom/lpass-platform.c | 499 +++++++++++++++++++++++++++++++++++++---
> 2 files changed, 773 insertions(+), 38 deletions(-)
>
> diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c
> index 3bd9eb3..c8dec52 100644
> --- a/sound/soc/qcom/lpass-cpu.c
> +++ b/sound/soc/qcom/lpass-cpu.c
> @@ -798,6 +798,251 @@ static struct regmap_config lpass_hdmi_regmap_config = {
> .cache_type = REGCACHE_FLAT,
> };
>
> +static bool lpass_rxtx_regmap_writeable(struct device *dev, unsigned int reg)
> +{
> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> + struct lpass_variant *v = drvdata->variant;
> + int i;
> +
> + for (i = 0; i < v->rxtx_irq_ports; ++i) {
> + if (reg == LPAIF_RXTX_IRQCLEAR_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQEN_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQSTAT_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->rxtx_rdma_channels; ++i) {
> + if (reg == LPAIF_CDC_RDMACTL_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMABASE_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMABUFF_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMAPER_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMA_INTF_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->rxtx_wrdma_channels; ++i) {
> + if (reg == LPAIF_CDC_WRDMACTL_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABASE_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABUFF_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMAPER_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMA_INTF_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + }
> +
> + return false;
> +}
> +
> +static bool lpass_rxtx_regmap_readable(struct device *dev, unsigned int reg)
> +{
> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> + struct lpass_variant *v = drvdata->variant;
> + int i;
> +
> + for (i = 0; i < v->rxtx_irq_ports; ++i) {
> + if (reg == LPAIF_RXTX_IRQCLEAR_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQEN_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQSTAT_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->rxtx_rdma_channels; ++i) {
> + if (reg == LPAIF_CDC_RDMACTL_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMABASE_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMABUFF_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMACURR_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMAPER_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_CDC_RDMA_INTF_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->rxtx_wrdma_channels; ++i) {
> + if (reg == LPAIF_CDC_WRDMACTL_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABASE_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABUFF_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMACURR_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMAPER_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + if (reg == LPAIF_CDC_WRDMA_INTF_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> + }
> +
> + return false;
> +}
lpass_rxtx_regmap_readable() is almost the same as lpass_rxtx_regmap_writeable(),
except for LPAIF_CDC_RDMACURR_REG and LPAIF_CDC_WRDMACURR_REG. Add something like
static bool __lpass_rxtx_regmap_accessible(struct device *dev, unsigned int reg, bool rw)
which would look essentially like lpass_rxtx_regmap_readable() but checks the
'rw' parameter for LPAIF_CDC_RDMACURR_REG and LPAIF_CDC_WRDMACURR_REG.
lpass_rxtx_regmap_readable() and lpass_rxtx_regmap_writeable() then call this
function with the corresponding value for 'rw'
> +
> +static bool lpass_rxtx_regmap_volatile(struct device *dev, unsigned int reg)
> +{
> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> + struct lpass_variant *v = drvdata->variant;
> + int i;
> +
> + for (i = 0; i < v->rxtx_irq_ports; ++i) {
> + if (reg == LPAIF_RXTX_IRQCLEAR_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQSTAT_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->rxtx_rdma_channels; ++i)
> + if (reg == LPAIF_CDC_RDMACURR_REG(v, i, LPASS_CDC_DMA_RX0))
> + return true;
> +
> + for (i = 0; i < v->rxtx_wrdma_channels; ++i)
> + if (reg == LPAIF_CDC_WRDMACURR_REG(v, i + v->rxtx_wrdma_channel_start,
> + LPASS_CDC_DMA_TX3))
> + return true;
> +
> + return false;
> +}
> +
> +static bool lpass_va_regmap_writeable(struct device *dev, unsigned int reg)
> +{
> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> + struct lpass_variant *v = drvdata->variant;
> + int i;
> +
> + for (i = 0; i < v->va_irq_ports; ++i) {
> + if (reg == LPAIF_RXTX_IRQCLEAR_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQEN_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQSTAT_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->va_wrdma_channels; ++i) {
> + if (reg == LPAIF_CDC_WRDMACTL_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABASE_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABUFF_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMAPER_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMA_INTF_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + }
> +
> + return false;
> +}
> +
> +static bool lpass_va_regmap_readable(struct device *dev, unsigned int reg)
> +{
> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> + struct lpass_variant *v = drvdata->variant;
> + int i;
> +
> + for (i = 0; i < v->va_irq_ports; ++i) {
> + if (reg == LPAIF_RXTX_IRQCLEAR_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQEN_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQSTAT_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->va_wrdma_channels; ++i) {
> + if (reg == LPAIF_CDC_WRDMACTL_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABASE_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMABUFF_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMACURR_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMAPER_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_CDC_WRDMA_INTF_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + }
> +
> + return false;
> +}
Same as for lpass_rxtx_regmap_readable/writable()
> +
> +static bool lpass_va_regmap_volatile(struct device *dev, unsigned int reg)
> +{
> + struct lpass_data *drvdata = dev_get_drvdata(dev);
> + struct lpass_variant *v = drvdata->variant;
> + int i;
> +
> + for (i = 0; i < v->va_irq_ports; ++i) {
> + if (reg == LPAIF_RXTX_IRQCLEAR_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + if (reg == LPAIF_RXTX_IRQSTAT_REG(v, i, LPASS_CDC_DMA_VA_TX0))
> + return true;
> + }
> +
> + for (i = 0; i < v->va_wrdma_channels; ++i) {
> + if (reg == LPAIF_CDC_WRDMACURR_REG(v, i + v->va_wrdma_channel_start,
> + LPASS_CDC_DMA_VA_TX0))
> + return true;
> + }
> +
> + return false;
> +}
> +
> +static struct regmap_config lpass_rxtx_regmap_config = {
> + .reg_bits = 32,
> + .reg_stride = 4,
> + .val_bits = 32,
> + .writeable_reg = lpass_rxtx_regmap_writeable,
> + .readable_reg = lpass_rxtx_regmap_readable,
> + .volatile_reg = lpass_rxtx_regmap_volatile,
> + .cache_type = REGCACHE_FLAT,
> +};
> +
> +static struct regmap_config lpass_va_regmap_config = {
> + .reg_bits = 32,
> + .reg_stride = 4,
> + .val_bits = 32,
> + .writeable_reg = lpass_va_regmap_writeable,
> + .readable_reg = lpass_va_regmap_readable,
> + .volatile_reg = lpass_va_regmap_volatile,
> + .cache_type = REGCACHE_FLAT,
> +};
> +
> static unsigned int of_lpass_cpu_parse_sd_lines(struct device *dev,
> struct device_node *node,
> const char *name)
> @@ -837,6 +1082,17 @@ static unsigned int of_lpass_cpu_parse_sd_lines(struct device *dev,
> }
> }
>
> +static bool is_cdc_dma_port(int dai_id)
> +{
> + switch (dai_id) {
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_TX3:
> + case LPASS_CDC_DMA_VA_TX0:
> + return true;
> + default:
> + return false;
> + }
> +}
> static void of_lpass_cpu_parse_dai_data(struct device *dev,
> struct lpass_data *data)
> {
> @@ -857,7 +1113,9 @@ static void of_lpass_cpu_parse_dai_data(struct device *dev,
> }
> if (id == LPASS_DP_RX) {
> data->hdmi_port_enable = 1;
> - } else {
> + } else if (is_cdc_dma_port(id))
> + data->wcd_codec_enable = 1;
> + else {
> data->mi2s_playback_sd_mode[id] =
> of_lpass_cpu_parse_sd_lines(dev, node,
> "qcom,playback-sd-lines");
> @@ -897,6 +1155,53 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
>
> of_lpass_cpu_parse_dai_data(dev, drvdata);
>
> + drvdata->num_clks = variant->num_clks;
> + if (drvdata->wcd_codec_enable) {
> + drvdata->rxtx_lpaif =
> + devm_platform_ioremap_resource_byname(pdev, "lpass-rxtx-lpaif");
> + if (IS_ERR(drvdata->rxtx_lpaif))
> + return PTR_ERR(drvdata->rxtx_lpaif);
> +
> + drvdata->va_lpaif = devm_platform_ioremap_resource_byname(pdev, "lpass-va-lpaif");
> + if (IS_ERR(drvdata->va_lpaif))
> + return PTR_ERR(drvdata->va_lpaif);
> +
> + lpass_rxtx_regmap_config.max_register = LPAIF_CDC_WRDMAPER_REG(variant,
> + variant->rxtx_wrdma_channels +
> + variant->rxtx_wrdma_channel_start, LPASS_CDC_DMA_TX3);
> +
> + drvdata->rxtx_lpaif_map = devm_regmap_init_mmio(dev, drvdata->rxtx_lpaif,
> + &lpass_rxtx_regmap_config);
> + if (IS_ERR(drvdata->rxtx_lpaif_map)) {
> + dev_err(dev, "error initializing regmap: %ld\n",
The same error is logged a few lines below, you might want to log which regmap
couldn't be initialized.
> + PTR_ERR(drvdata->rxtx_lpaif_map));
fix indentation
> + return PTR_ERR(drvdata->rxtx_lpaif_map);
> + }
> + lpass_va_regmap_config.max_register = LPAIF_CDC_WRDMAPER_REG(variant,
> + variant->va_wrdma_channels +
> + variant->va_wrdma_channel_start, LPASS_CDC_DMA_VA_TX0);
> +
> + drvdata->va_lpaif_map = devm_regmap_init_mmio(dev, drvdata->va_lpaif,
> + &lpass_va_regmap_config);
> + if (IS_ERR(drvdata->va_lpaif_map)) {
> + dev_err(dev, "error initializing regmap: %ld\n",
see above
> + PTR_ERR(drvdata->va_lpaif_map));
fix indentation
> + return PTR_ERR(drvdata->va_lpaif_map);
> + }
> + drvdata->cdc_num_clks = variant->cdc_dma_num_clks;
> + for (i = 0; i < variant->cdc_dma_num_clks; i++) {
> + drvdata->cdc_dma_clks[i] = devm_clk_get(dev,
> + variant->cdc_dma_clk_names[i]);
> + if (IS_ERR(drvdata->cdc_dma_clks[i])) {
> + vdata->lpaif_map;
> + }
> }
>
> ret = regmap_write(map, LPAIF_DMABASE_REG(v, ch, dir, dai_id),
> @@ -423,6 +578,16 @@ static int lpass_platform_pcmops_prepare(struct snd_soc_component *component,
> return ret;
> }
>
> + if (dai_id == LPASS_CDC_DMA_RX0 ||
> + dai_id == LPASS_CDC_DMA_TX3 ||
> + dai_id == LPASS_CDC_DMA_VA_TX0) {
> + ret = regmap_fields_write(dmactl->fifowm, id, LPAIF_DMACTL_FIFOWM_8);
> + if (ret) {
> + dev_err(soc_runtime->dev, "error writing fifowm field to dmactl reg: %d, id: %d\n",
> + ret, id);
> + return ret;
> + }
> + }
> ret = regmap_fields_write(dmactl->enable, id, LPAIF_DMACTL_ENABLE_ON);
> if (ret) {
> dev_err(soc_runtime->dev, "error writing to rdmactl reg: %d\n",
> @@ -457,14 +622,27 @@ static int lpass_platform_pcmops_trigger(struct snd_soc_component *component,
> if (dai_id == LPASS_DP_RX) {
> dmactl = drvdata->hdmi_rd_dmactl;
> map = drvdata->hdmiif_map;
> + } else if (dai_id == LPASS_CDC_DMA_RX0) {
> + map = drvdata->rxtx_lpaif_map;
> + dmactl = drvdata->rxtx_rd_dmactl;
> } else {
> dmactl = drvdata->rd_dmactl;
> map = drvdata->lpaif_map;
> }
> } else {
> - dmactl = drvdata->wr_dmactl;
> - id = pcm_data->dma_ch - v->wrdma_channel_start;
> - map = drvdata->lpaif_map;
> + if (dai_id == LPASS_CDC_DMA_TX3) {
> + dmactl = drvdata->rxtx_wr_dmactl;
> + map = drvdata->rxtx_lpaif_map;
> + id = pcm_data->dma_ch - v->rxtx_wrdma_channel_start;
> + } else if (dai_id == LPASS_CDC_DMA_VA_TX0) {
> + dmactl = drvdata->va_wr_dmactl;
> + map = drvdata->va_lpaif_map;
> + id = pcm_data->dma_ch - v->va_wrdma_channel_start;
> + } else {
> + dmactl = drvdata->wr_dmactl;
> + id = pcm_data->dma_ch - v->wrdma_channel_start;
> + map = drvdata->lpaif_map;
> + }
As for "[4/8] ASoC: qcom: Add lapss CPU driver for codec dma control", I think
you want a helper that encapsulates the above, instead of open coding it
multiple times in the driver.
> }
>
> switch (cmd) {
> @@ -479,6 +657,24 @@ static int lpass_platform_pcmops_trigger(struct snd_soc_component *component,
> return ret;
> }
> switch (dai_id) {
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_TX3:
> + case LPASS_CDC_DMA_VA_TX0:
> + ret = regmap_fields_write(dmactl->dyncclk, id, LPAIF_DMACTL_DYNCLK_ON);
> + if (ret) {
> + dev_err(soc_runtime->dev,
> + "error writing to rdmactl reg field: %d\n", ret);
> + return ret;
> + }
> + map = (dai_id == LPASS_CDC_DMA_VA_TX0) ?
> + drvdata->va_lpaif_map : drvdata->rxtx_lpaif_map;
'map' was already assigned earlier.
> + reg_irqclr = LPAIF_RXTX_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST, dai_id);
> + val_irqclr = LPAIF_IRQ_ALL(ch);
> +
> + reg_irqen = LPAIF_RXTX_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST, dai_id);
> + val_mask = LPAIF_IRQ_ALL(ch);
> + val_irqen = LPAIF_IRQ_ALL(ch);
> + break;
> case LPASS_DP_RX:
> ret = regmap_fields_write(dmactl->dyncclk, id,
> LPAIF_DMACTL_DYNCLK_ON);
> @@ -543,6 +739,26 @@ static int lpass_platform_pcmops_trigger(struct snd_soc_component *component,
> return ret;
> }
> switch (dai_id) {
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_TX3:
> + case LPASS_CDC_DMA_VA_TX0:
> + ret = regmap_fields_write(dmactl->dyncclk, id, LPAIF_DMACTL_DYNCLK_OFF);
> + if (ret) {
> + dev_err(soc_runtime->dev,
> + "error writing to rdmactl reg field: %d\n", ret);
> + return ret;
> + }
> + map = (dai_id == LPASS_CDC_DMA_VA_TX0) ?
> + drvdata->va_lpaif_map : drvdata->rxtx_lpaif_map;
ditto
> +
> + reg_irqclr = LPAIF_RXTX_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST, dai_id);
> + val_irqclr = LPAIF_IRQ_ALL(ch);
> +
> + reg_irqen = LPAIF_RXTX_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST, dai_id);
> + val_mask = LPAIF_IRQ_ALL(ch);
> + val_irqen = LPAIF_IRQ_ALL(ch);
> +
> + break;
> case LPASS_DP_RX:
> ret = regmap_fields_write(dmactl->dyncclk, id,
> LPAIF_DMACTL_DYNCLK_OFF);
> @@ -601,6 +817,12 @@ static snd_pcm_uframes_t lpass_platform_pcmops_pointer(
>
> if (dai_id == LPASS_DP_RX)
> map = drvdata->hdmiif_map;
> + else if (dai_id == LPASS_CDC_DMA_RX0 ||
> + dai_id == LPASS_CDC_DMA_TX3 ||
> + dai_id == LPASS_CDC_DMA_VA_TX0)
> + map = (dai_id == LPASS_CDC_DMA_VA_TX0) ?
> + drvdata->va_lpaif_map :
> + drvdata->rxtx_lpaif_map;
> else
> map = drvdata->lpaif_map;
use helper to get map from dai id
>
> @@ -625,12 +847,39 @@ static snd_pcm_uframes_t lpass_platform_pcmops_pointer(
> return bytes_to_frames(substream->runtime, curr_addr - base_addr);
> }
>
> +static int lpass_platform_cdc_dma_mmap(struct snd_soc_component *component,
> + struct snd_pcm_substream *substream,
> + struct vm_area_struct *vma)
> +{
> + struct snd_pcm_runtime *runtime = substream->runtime;
> + unsigned long size, offset;
> + int ret;
> +
> + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
> + size = vma->vm_end - vma->vm_start;
> + offset = vma->vm_pgoff << PAGE_SHIFT;
> + ret = io_remap_pfn_range(vma, vma->vm_start,
> + (runtime->dma_addr + offset) >> PAGE_SHIFT,
> + size, vma->vm_page_prot);
> +
> + return ret;
no need for 'ret' just 'return io_remap_pfn_range(...);'
> +}
> +
> static int lpass_platform_pcmops_mmap(struct snd_soc_component *component,
> struct snd_pcm_substream *substream,
> struct vm_area_struct *vma)
> {
> struct snd_pcm_runtime *runtime = substream->runtime;
> + struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream);
> + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0);
> + unsigned int dai_id = cpu_dai->driver->id;
>
> + if (dai_id == LPASS_CDC_DMA_RX0 ||
> + dai_id == LPASS_CDC_DMA_TX3 ||
> + dai_id == LPASS_CDC_DMA_VA_TX0) {
> + lpass_platform_cdc_dma_mmap(component, substream, vma);
> + return 0;
> + }
> return dma_mmap_coherent(component->dev, vma, runtime->dma_area,
> runtime->dma_addr, runtime->dma_bytes);
> }
> @@ -651,6 +900,14 @@ static irqreturn_t lpass_dma_interrupt_handler(
>
> mask = LPAIF_IRQ_ALL(chan);
> switch (dai_id) {
> + case LPASS_CDC_DMA_RX0:
> + case LPASS_CDC_DMA_TX3:
> + case LPASS_CDC_DMA_VA_TX0:
> + map = (dai_id == LPASS_CDC_DMA_VA_TX0) ?
> + drvdata->va_lpaif_map : drvdata->rxtx_lpaif_map;
> + reg = LPAIF_RXTX_IRQCLEAR_REG(v, LPAIF_IRQ_PORT_HOST, dai_id);
> + val = 0;
> + break;
> case LPASS_DP_RX:
> map = drvdata->hdmiif_map;
> reg = LPASS_HDMITX_APP_IRQCLEAR_REG(v);
> @@ -774,41 +1031,131 @@ 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;
> + int rv, chan;
> +
> + rv = regmap_read(drvdata->rxtx_lpaif_map,
> + LPAIF_RXTX_IRQSTAT_REG(v, LPAIF_IRQ_PORT_HOST, LPASS_CDC_DMA_RX0), &irqs);
> + if (rv)
> + return IRQ_NONE;
> + /* 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;
> + int rv, chan;
>
> + rv = regmap_read(drvdata->va_lpaif_map,
> + LPAIF_RXTX_IRQSTAT_REG(v, LPAIF_IRQ_PORT_HOST,
> + LPASS_CDC_DMA_VA_TX0), &irqs);
> + if (rv)
> + return IRQ_NONE;
> + /* 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_pcm *pcm,
> + struct snd_pcm_substream *substream, int dai_id)
> +{
> + struct snd_dma_buffer *buf = &substream->dma_buffer;
> + int ret;
> +
> + ret = dma_coerce_mask_and_coherent(pcm->card->dev, DMA_BIT_MASK(64));
> + if (ret)
> + return ret;
> +
> + buf->dev.dev = pcm->card->dev;
> + buf->private_data = NULL;
> +
> + /* Assign Codec DMA buffer pointers */
> + buf->dev.type = SNDRV_DMA_TYPE_CONTINUOUS;
> + if (dai_id == LPASS_CDC_DMA_RX0) {
> + buf->bytes = lpass_platform_rxtx_hardware.buffer_bytes_max;
> + buf->addr = LPSAS_RXTX_CDC_DMA_LPM_ADDR;
> + } else if (dai_id == LPASS_CDC_DMA_TX3) {
> + buf->bytes = lpass_platform_rxtx_hardware.buffer_bytes_max;
> + buf->addr = LPSAS_RXTX_CDC_DMA_LPM_ADDR + LPSAS_RXTX_CDC_DMA_LPM_BUFF_SIZE;
> + } else if (dai_id == LPASS_CDC_DMA_VA_TX0) {
> + buf->bytes = lpass_platform_va_hardware.buffer_bytes_max;
> + buf->addr = LPSAS_VA_CDC_DMA_LPM_ADDR;
> + }
> +
> + buf->area = (unsigned char * __force)ioremap(buf->addr, buf->bytes);
> +
> + 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_pcm_substream *psubstream, *csubstream;
> int ret;
> + 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;
>
> psubstream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
> if (psubstream) {
> - ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
> - component->dev,
> - size, &psubstream->dma_buffer);
> - if (ret) {
> - dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n");
> - return ret;
> + if (dai_id == LPASS_CDC_DMA_RX0) {
> + lpass_platform_prealloc_cdc_dma_buffer(pcm, psubstream, dai_id);
> + } else {
> + ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
> + component->dev,
> + size, &psubstream->dma_buffer);
> + if (ret) {
> + dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n");
> + return ret;
> + }
> }
> }
>
> csubstream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
> if (csubstream) {
> - ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
> - component->dev,
> - size, &csubstream->dma_buffer);
> - if (ret) {
> - dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n");
> - if (psubstream)
> - snd_dma_free_pages(&psubstream->dma_buffer);
> - return ret;
> + if (dai_id == LPASS_CDC_DMA_TX3 || dai_id == LPASS_CDC_DMA_VA_TX0) {
> + lpass_platform_prealloc_cdc_dma_buffer(pcm, csubstream, dai_id);
> + } else {
> + ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
> + component->dev,
> + size, &csubstream->dma_buffer);
> + if (ret) {
> + dev_err(soc_runtime->dev, "Cannot allocate buffer(s)\n");
> + if (psubstream)
> + snd_dma_free_pages(&psubstream->dma_buffer);
> + return ret;
> + }
> }
> -
> }
>
> return 0;
> @@ -818,18 +1165,43 @@ static void lpass_platform_pcm_free(struct snd_soc_component *component,
> struct snd_pcm *pcm)
> {
> struct snd_pcm_substream *substream;
> + unsigned int dai_id = component->id;
> int i;
>
> for_each_pcm_streams(i) {
> substream = pcm->streams[i].substream;
> if (substream) {
> - snd_dma_free_pages(&substream->dma_buffer);
> + if (dai_id == LPASS_CDC_DMA_RX0 ||
> + dai_id == LPASS_CDC_DMA_TX3 ||
> + dai_id == LPASS_CDC_DMA_VA_TX0) {
> + if (substream->dma_buffer.area)
> + iounmap((void __iomem *)substream->dma_buffer.area);
> + } else {
> + snd_dma_free_pages(&substream->dma_buffer);
> + }
> substream->dma_buffer.area = NULL;
> substream->dma_buffer.addr = 0;
> }
> }
> }
>
> +int lpass_platform_copy(struct snd_soc_component *component,
> + struct snd_pcm_substream *substream, int channel,
> + unsigned long pos, void __user *buf, unsigned long bytes)
> +{
> + struct snd_pcm_runtime *rt = substream->runtime;
> +
delete empty line
> + unsigned char *dma_buf = rt->dma_area + pos +
> + channel * (rt->dma_bytes / rt->channels);
> +
> + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
> + return copy_from_user_toio(dma_buf, buf, bytes);
> + else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
> + return copy_to_user_fromio(buf, dma_buf, bytes);
> +
> + return 0;
Can 'substream->stream' have any other value than SNDRV_PCM_STREAM_PLAYBACK or
SNDRV_PCM_STREAM_CAPTURE? If not maybe return -EINVAL here?
> +}
> +
> static int lpass_platform_pcmops_suspend(struct snd_soc_component *component)
> {
> struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
> @@ -875,6 +1247,7 @@ static const struct snd_soc_component_driver lpass_component_driver = {
> .mmap = lpass_platform_pcmops_mmap,
> .pcm_construct = lpass_platform_pcm_new,
> .pcm_destruct = lpass_platform_pcm_free,
> + .copy_user = lpass_platform_copy,
> .suspend = lpass_platform_pcmops_suspend,
> .resume = lpass_platform_pcmops_resume,
>
> @@ -914,6 +1287,60 @@ int asoc_qcom_lpass_platform_register(struct platform_device *pdev)
> return ret;
> }
>
> + if (drvdata->wcd_codec_enable) {
> + ret = regmap_write(drvdata->rxtx_lpaif_map,
> + LPAIF_RXTX_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST, LPASS_CDC_DMA_TX3), 0x0);
> + if (ret) {
> + dev_err(&pdev->dev, "error writing to rxtx irqen reg: %d\n", ret);
> + return ret;
> + }
> + ret = regmap_write(drvdata->va_lpaif_map,
> + LPAIF_RXTX_IRQEN_REG(v, LPAIF_IRQ_PORT_HOST, LPASS_CDC_DMA_VA_TX0), 0x0);
> + if (ret) {
> + dev_err(&pdev->dev, "error writing to rxtx irqen reg: %d\n", ret);
> + return ret;
> + }
> + drvdata->rxtxif_irq = platform_get_irq_byname(pdev, "lpass-irq-rxtxif");
> + if (drvdata->rxtxif_irq < 0)
> + return -ENODEV;
> +
> + ret = devm_request_irq(&pdev->dev, drvdata->rxtxif_irq,
> + lpass_platform_rxtxif_irq, IRQF_TRIGGER_RISING,
> + "lpass-irq-rxtxif", drvdata);
> + if (ret) {
> + dev_err(&pdev->dev, "rxtx irq request failed: %d\n", ret);
> + return ret;
> + }
> +
> + ret = lpass_platform_alloc_rxtx_dmactl_fields(&pdev->dev,
> + drvdata->rxtx_lpaif_map);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "error initializing rxtx dmactl fields: %d\n", ret);
> + return ret;
> + }
> +
> + drvdata->vaif_irq = platform_get_irq_byname(pdev, "lpass-irq-vaif");
> + if (drvdata->vaif_irq < 0)
> + return -ENODEV;
> +
> + ret = devm_request_irq(&pdev->dev, drvdata->vaif_irq,
> + lpass_platform_vaif_irq, IRQF_TRIGGER_RISING,
> + "lpass-irq-vaif", drvdata);
> + if (ret) {
> + dev_err(&pdev->dev, "va irq request failed: %d\n", ret);
> + return ret;
> + }
> +
> + ret = lpass_platform_alloc_va_dmactl_fields(&pdev->dev,
> + drvdata->va_lpaif_map);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "error initializing va dmactl fields: %d\n", ret);
> + return ret;
> + }
> + }
> +
> if (drvdata->hdmi_port_enable) {
> drvdata->hdmiif_irq = platform_get_irq_byname(pdev, "lpass-irq-hdmi");
> if (drvdata->hdmiif_irq < 0)
> --
> Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
> is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
>