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SubjectRe: [linux-sunxi] [PATCH v3 05/12] ASoC: sun4i-i2s: Add regmap fields for channels
On Sat, Jul 29, 2017 at 10:17 PM,  <codekipper@gmail.com> wrote:
> From: Marcus Cooper <codekipper@gmail.com>
>
> On the original i2s block the channel mapping and selection were
> configured for stereo audio by default: This is not the case with
> the newer SoCs and they are also located at different offsets.
>
> To support the newer SoC then regmap fields have been added to the
> quirks and these are initialised to their correct settings during
> probing.
>
> Signed-off-by: Marcus Cooper <codekipper@gmail.com>
> ---
> sound/soc/sunxi/sun4i-i2s.c | 80 ++++++++++++++++++++++++++++++++++++++++-----
> 1 file changed, 72 insertions(+), 8 deletions(-)
>
> diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
> index 2a25df22c2f8..120f797a38e8 100644
> --- a/sound/soc/sunxi/sun4i-i2s.c
> +++ b/sound/soc/sunxi/sun4i-i2s.c
> @@ -82,7 +82,7 @@
> #define SUN4I_I2S_TX_CNT_REG 0x2c
>
> #define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
> -#define SUN4I_I2S_TX_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
> +#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
>
> #define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
> #define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
> @@ -98,6 +98,10 @@
> * @sun4i_i2s_regmap: regmap config to use.
> * @mclk_offset: Value by which mclkdiv needs to be adjusted.
> * @bclk_offset: Value by which bclkdiv needs to be adjusted.
> + * @field_txchanmap: location of the tx channel mapping register.
> + * @field_rxchanmap: location of the rx channel mapping register.
> + * @field_txchansel: location of the tx channel select bit fields.
> + * @field_rxchansel: location of the rx channel select bit fields.
> */
> struct sun4i_i2s_quirks {
> bool has_reset;
> @@ -105,6 +109,12 @@ struct sun4i_i2s_quirks {
> const struct regmap_config *sun4i_i2s_regmap;
> unsigned int mclk_offset;
> unsigned int bclk_offset;
> +
> + /* Register fields for i2s */
> + struct reg_field field_txchanmap;
> + struct reg_field field_rxchanmap;
> + struct reg_field field_txchansel;
> + struct reg_field field_rxchansel;
> };
>
> struct sun4i_i2s {
> @@ -118,6 +128,12 @@ struct sun4i_i2s {
> struct snd_dmaengine_dai_dma_data capture_dma_data;
> struct snd_dmaengine_dai_dma_data playback_dma_data;
>
> + /* Register fields for i2s */
> + struct regmap_field *field_txchanmap;
> + struct regmap_field *field_rxchanmap;
> + struct regmap_field *field_txchansel;
> + struct regmap_field *field_rxchansel;
> +
> const struct sun4i_i2s_quirks *variant;
> };
>
> @@ -264,6 +280,18 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
> if (params_channels(params) != 2)
> return -EINVAL;
>
> + /* Map the channels for playback and capture */
> + regmap_field_write(i2s->field_txchanmap, 0x76543210);
> + regmap_field_write(i2s->field_rxchanmap, 0x00003210);
> +
> + /* Configure the channels */
> + regmap_field_write(i2s->field_txchansel,
> + SUN4I_I2S_CHAN_SEL(params_channels(params)));
> +
> + regmap_field_write(i2s->field_rxchansel,
> + SUN4I_I2S_CHAN_SEL(params_channels(params)));
> +
> +

Checkpatch says don't use multiple blank lines.

> switch (params_physical_width(params)) {
> case 16:
> width = DMA_SLAVE_BUSWIDTH_2_BYTES;
> @@ -486,13 +514,6 @@ static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
> SUN4I_I2S_CTRL_SDO_EN_MASK,
> SUN4I_I2S_CTRL_SDO_EN(0));
>
> - /* Enable the first two channels */
> - regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_SEL_REG,
> - SUN4I_I2S_TX_CHAN_SEL(2));
> -
> - /* Map them to the two first samples coming in */
> - regmap_write(i2s->regmap, SUN4I_I2S_TX_CHAN_MAP_REG,
> - SUN4I_I2S_TX_CHAN_MAP(0, 0) | SUN4I_I2S_TX_CHAN_MAP(1, 1));
>
> return clk_prepare_enable(i2s->mod_clk);
> }
> @@ -677,14 +698,51 @@ static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
> .has_reset = false,
> .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
> .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
> + .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
> + .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
> + .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
> + .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
> };
>
> static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
> .has_reset = true,
> .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
> .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
> + .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
> + .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
> + .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
> + .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
> };
>
> +static int sun4i_i2s_init_regmap_fields(struct device *dev, struct sun4i_i2s *i2s)

This line is over 80 characters. Please wrap the line.

> +{
> + i2s->field_txchanmap =
> + devm_regmap_field_alloc(dev, i2s->regmap,
> + i2s->variant->field_txchanmap);
> + if (IS_ERR(i2s->field_txchanmap))
> + return PTR_ERR(i2s->field_txchanmap);
> +
> + i2s->field_rxchanmap =
> + devm_regmap_field_alloc(dev, i2s->regmap,
> + i2s->variant->field_rxchanmap);
> + if (IS_ERR(i2s->field_rxchanmap))
> + return PTR_ERR(i2s->field_rxchanmap);
> +
> + i2s->field_txchansel =
> + devm_regmap_field_alloc(dev, i2s->regmap,
> + i2s->variant->field_txchansel);
> + if (IS_ERR(i2s->field_txchansel))
> + return PTR_ERR(i2s->field_txchansel);
> +
> + i2s->field_rxchansel =
> + devm_regmap_field_alloc(dev, i2s->regmap,
> + i2s->variant->field_rxchansel);
> + if (IS_ERR(i2s->field_rxchansel))
> + return PTR_ERR(i2s->field_rxchansel);
> +
> + return 0;

This seems to be the last "if (IS_ERR()) return PTR_ERR()" sequence.
So it looks like you could apply the PTR_ERR_OR_ZERO hunk from the
kbuild test robot. I wasn't aware of this preference before, and to
be honest I'm fine either way.

Otherwise,

Reviewed-by: Chen-Yu Tsai <wens@csie.org>


> +}
> +
> static int sun4i_i2s_probe(struct platform_device *pdev)
> {
> struct sun4i_i2s *i2s;
> @@ -778,6 +836,12 @@ static int sun4i_i2s_probe(struct platform_device *pdev)
> goto err_suspend;
> }
>
> + ret = sun4i_i2s_init_regmap_fields(&pdev->dev, i2s);
> + if (ret) {
> + dev_err(&pdev->dev, "Could not initialise regmap fields\n");
> + goto err_suspend;
> + }
> +
> return 0;
>
> err_suspend:
> --
> 2.13.3
>
> --
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