Quoting Srinivasa Rao Mandadapu (2022-02-14 06:58:22)
> Add support function to get dma control and lpaif handle to avoid
> repeated code in platform driver
>
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@xxxxxxxxxxx>
> Co-developed-by: Venkata Prasad Potturu <quic_potturu@xxxxxxxxxxx>
> Signed-off-by: Venkata Prasad Potturu <quic_potturu@xxxxxxxxxxx>
> Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
> ---
> sound/soc/qcom/lpass-platform.c | 113 +++++++++++++++++++++++-----------------
> 1 file changed, 66 insertions(+), 47 deletions(-)
>
> diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
> index a44162c..5d77240 100644
> --- a/sound/soc/qcom/lpass-platform.c
> +++ b/sound/soc/qcom/lpass-platform.c
> @@ -177,6 +177,49 @@ static int lpass_platform_pcmops_close(struct snd_soc_component *component,
> return 0;
> }
>
> +static void __lpass_get_lpaif_handle(struct snd_pcm_substream *substream,
const?
> + struct snd_soc_component *component,
const?
> + struct lpaif_dmactl **dmactl, int *id, struct regmap **map)
> +{
> + 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);
> + struct lpass_data *drvdata = snd_soc_component_get_drvdata(component);
> + struct snd_pcm_runtime *rt = substream->runtime;
> + struct lpass_pcm_data *pcm_data = rt->private_data;
> + struct lpass_variant *v = drvdata->variant;
> + int dir = substream->stream;
> + unsigned int dai_id = cpu_dai->driver->id;
> + struct lpaif_dmactl *l_dmactl = NULL;
> + struct regmap *l_map = NULL;
> + int l_id = 0;
> +
> + switch (dai_id) {
> + case MI2S_PRIMARY ... MI2S_QUINARY:
> + if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
Please write if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) and
drop 'dir' local variable.
> + l_id = pcm_data->dma_ch;
> + l_dmactl = drvdata->rd_dmactl;
> + } else {
> + l_dmactl = drvdata->wr_dmactl;
> + l_id = pcm_data->dma_ch - v->wrdma_channel_start;
> + }
> + l_map = drvdata->lpaif_map;
> + break;
> + case LPASS_DP_RX:
> + l_id = pcm_data->dma_ch;
> + l_dmactl = drvdata->hdmi_rd_dmactl;
> + l_map = drvdata->hdmiif_map;
> + break;
> + default:
> + break;
> + }
> + if (dmactl)
> + *dmactl = l_dmactl;
> + if (id)
> + *id = l_id;
> + if (map)
> + *map = l_map;
Why not 'return 0' here and return -EINVAL in the default case above? Then
we can skip the checks for !map or !dmactl below and simply bail out if
it failed with an error value.
> +}
> +
> static int lpass_platform_pcmops_hw_params(struct snd_soc_component *component,
> struct snd_pcm_substream *substream,
> struct snd_pcm_hw_params *params)
> @@ -191,21 +234,15 @@ static int lpass_platform_pcmops_hw_params(struct snd_soc_component *component,
> unsigned int channels = params_channels(params);
> unsigned int regval;
> struct lpaif_dmactl *dmactl;
> - int id, dir = substream->stream;
> + int id;
> int bitwidth;
> int ret, dma_port = pcm_data->i2s_port + v->dmactl_audif_start;
> unsigned int dai_id = cpu_dai->driver->id;
>
> - if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
> - id = pcm_data->dma_ch;
> - if (dai_id == LPASS_DP_RX)
> - dmactl = drvdata->hdmi_rd_dmactl;
> - else
> - dmactl = drvdata->rd_dmactl;
> -
> - } else {
> - dmactl = drvdata->wr_dmactl;
> - id = pcm_data->dma_ch - v->wrdma_channel_start;
> + __lpass_get_lpaif_handle(substream, component, &dmactl, &id, NULL);
> + if (!dmactl) {
> + dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
> + return -EINVAL;
> }
>
> bitwidth = snd_pcm_format_width(format);
> @@ -350,10 +387,11 @@ static int lpass_platform_pcmops_hw_free(struct snd_soc_component *component,
> struct regmap *map;
> unsigned int dai_id = cpu_dai->driver->id;
>
> - if (dai_id == LPASS_DP_RX)
> - map = drvdata->hdmiif_map;
> - else
> - map = drvdata->lpaif_map;
> + __lpass_get_lpaif_handle(substream, component, NULL, NULL, &map);
> + if (!map) {
> + dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
> + return -EINVAL;
> + }
>
> reg = LPAIF_DMACTL_REG(v, pcm_data->dma_ch, substream->stream, dai_id);
> ret = regmap_write(map, reg, 0);
> @@ -379,22 +417,12 @@ static int lpass_platform_pcmops_prepare(struct snd_soc_component *component,
> int ret, id, ch, dir = substream->stream;
> unsigned int dai_id = cpu_dai->driver->id;
>
> -
> ch = pcm_data->dma_ch;
> - if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
> - if (dai_id == LPASS_DP_RX) {
> - dmactl = drvdata->hdmi_rd_dmactl;
> - map = drvdata->hdmiif_map;
> - } else {
> - dmactl = drvdata->rd_dmactl;
> - map = drvdata->lpaif_map;
> - }
>
> - id = pcm_data->dma_ch;
> - } else {
> - dmactl = drvdata->wr_dmactl;
> - id = pcm_data->dma_ch - v->wrdma_channel_start;
> - map = drvdata->lpaif_map;
> + __lpass_get_lpaif_handle(substream, component, &dmactl, &id, &map);
> + if (!dmactl) {
> + dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
> + return -EINVAL;
> }
>
> ret = regmap_write(map, LPAIF_DMABASE_REG(v, ch, dir, dai_id),
> @@ -444,25 +472,15 @@ static int lpass_platform_pcmops_trigger(struct snd_soc_component *component,
> struct lpaif_dmactl *dmactl;
> struct regmap *map;
> int ret, ch, id;
> - int dir = substream->stream;
> unsigned int reg_irqclr = 0, val_irqclr = 0;
> unsigned int reg_irqen = 0, val_irqen = 0, val_mask = 0;
> unsigned int dai_id = cpu_dai->driver->id;
>
> ch = pcm_data->dma_ch;
> - if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
> - id = pcm_data->dma_ch;
> - if (dai_id == LPASS_DP_RX) {
> - dmactl = drvdata->hdmi_rd_dmactl;
> - map = drvdata->hdmiif_map;
> - } 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;
> + __lpass_get_lpaif_handle(substream, component, &dmactl, &id, &map);
> + if (!dmactl) {
> + dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
> + return -EINVAL;
> }
>
> switch (cmd) {
> @@ -597,10 +615,11 @@ static snd_pcm_uframes_t lpass_platform_pcmops_pointer(
> struct regmap *map;
> unsigned int dai_id = cpu_dai->driver->id;
>
> - if (dai_id == LPASS_DP_RX)
> - map = drvdata->hdmiif_map;
> - else
> - map = drvdata->lpaif_map;
> + __lpass_get_lpaif_handle(substream, component, NULL, NULL, &map);
> + if (!map) {
> + dev_err(soc_runtime->dev, "failed to get dmactl handle\n");
> + return -EINVAL;
> + }
>
> ch = pcm_data->dma_ch;
>
> --
> 2.7.4
>
