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SubjectRe: [PATCH 2/2] ASoC: max98390: Added Amplifier Driver
(The patch passed 2 round review in https://crrev.com/c/2083354)

On Sun, May 10, 2020 at 4:23 PM Steve Lee <steves.lee.maxim@gmail.com> wrote:
> +static int max98390_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
> +{
> + struct snd_soc_component *component = codec_dai->component;
> + struct max98390_priv *max98390 =
> + snd_soc_component_get_drvdata(component);
> + unsigned int mode;
> + unsigned int format;
> + unsigned int invert;
> +
> + dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
> +
> + switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
> + case SND_SOC_DAIFMT_CBS_CFS:
> + mode = MAX98390_PCM_MASTER_MODE_SLAVE;
> + break;
> + case SND_SOC_DAIFMT_CBM_CFM:
> + max98390->master = true;
> + mode = MAX98390_PCM_MASTER_MODE_MASTER;
> + break;
> + default:
> + dev_err(component->dev, "DAI clock mode unsupported\n");
> + return -EINVAL;
> + }
> +
> + regmap_update_bits(max98390->regmap,
> + MAX98390_PCM_MASTER_MODE,
> + MAX98390_PCM_MASTER_MODE_MASK,
> + mode);
> +
> + switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
> + case SND_SOC_DAIFMT_NB_NF:
> + break;
> + case SND_SOC_DAIFMT_IB_NF:
> + invert = MAX98390_PCM_MODE_CFG_PCM_BCLKEDGE;
> + break;
> + default:
> + dev_err(component->dev, "DAI invert mode unsupported\n");
> + return -EINVAL;
> + }
> +
> + regmap_update_bits(max98390->regmap,
> + MAX98390_PCM_MODE_CFG,
> + MAX98390_PCM_MODE_CFG_PCM_BCLKEDGE,
> + invert);
invert will be uninitialized in the SND_SOC_DAIFMT_NB_NF case.

> +static int max98390_dai_hw_params(struct snd_pcm_substream *substream,
> + struct snd_pcm_hw_params *params,
> + struct snd_soc_dai *dai)
Lack of 1 tab indent.

> +static int max98390_adaptive_rdc_get(struct snd_kcontrol *kcontrol,
> + struct snd_ctl_elem_value *ucontrol)
> +{
> + int rdc, rdc0;
> + struct snd_soc_component *component =
> + snd_soc_kcontrol_component(kcontrol);
> + struct max98390_priv *max98390 =
> + snd_soc_component_get_drvdata(component);
> +
> + regmap_read(max98390->regmap, THERMAL_RDC_RD_BACK_BYTE1, &rdc);
> + regmap_read(max98390->regmap, THERMAL_RDC_RD_BACK_BYTE0, &rdc0);
> + rdc0 |= rdc << 8;
> + ucontrol->value.integer.value[0] = rdc0;
ucontrol->value.integer.value[0] = rdc0 | (rdc << 8);

> +static int max98390_dsm_init(struct snd_soc_component *component)
> +{
> + int ret;
> + const char *filename;
> + struct max98390_priv *max98390 =
> + snd_soc_component_get_drvdata(component);
> + const struct firmware *fw = NULL;
> + char *dsm_param = NULL;
Don't need to initialize fw and dsm_param in the case.

> +
> + filename = "dsm_param.bin";
Either:
- initialize when declaring the variable
- remove the variable and inline into request_firmware() call

> + ret = request_firmware(&fw, filename, component->dev);
> + if (ret) {
> + dev_err(component->dev,
> + "Failed to acquire dsm params: %d\n", ret);
> + goto err;
> + }
> +
> + dev_info(component->dev,
> + "max98390: param fw size %d\n",
> + fw->size);
> + dsm_param = (char *)fw->data;
> + dsm_param += MAX98390_DSM_PAYLOAD_OFFSET;
> + regmap_bulk_write(max98390->regmap, DSM_EQ_BQ1_B0_BYTE0,
> + dsm_param,
> + fw->size - MAX98390_DSM_PAYLOAD_OFFSET);
> + release_firmware(fw);
> + regmap_write(max98390->regmap, MAX98390_R23E1_DSP_GLOBAL_EN, 0x01);
> +
> +err:
> + return ret;
> +}

> +static int max98390_probe(struct snd_soc_component *component)
> +{
> + struct max98390_priv *max98390 =
> + snd_soc_component_get_drvdata(component);
> +
> + /* Update dsm bin param */
This comment makes more sense if before max98390_dsm_init().

> + regmap_write(max98390->regmap, MAX98390_SOFTWARE_RESET, 0x01);
> + /* Sleep reset settle time */
> + msleep(20);
> + max98390_dsm_init(component);

> + /* Check Revision ID */
> + ret = regmap_read(max98390->regmap,
> + MAX98390_R24FF_REV_ID, &reg);
> + if (ret < 0) {
if (ret)

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