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SubjectRe: [PATCH v2 14/16] ASoC: fsl_ssi: Remove cpu_dai_drv from fsl_ssi structure
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On 11.01.2018 07:43, Nicolin Chen wrote:
> The cpu_dai_drv is only used for symmetric_rates. So this patch replaces
> it with a synchronous boolean flag.

You make cpu_dai_drv common to all SSI instances instead of per-instance.

What if you have multiple SSIs in the system with different
symmetric_{rates,samplebits,channels} settings?

Maciej

> Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
> Tested-by: Caleb Crome <caleb@crome.org>
> ---
> sound/soc/fsl/fsl_ssi.c | 32 ++++++++++++++++----------------
> 1 file changed, 16 insertions(+), 16 deletions(-)
>
> diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
> index 213962a..716603c 100644
> --- a/sound/soc/fsl/fsl_ssi.c
> +++ b/sound/soc/fsl/fsl_ssi.c
> @@ -208,11 +208,11 @@ struct fsl_ssi_soc_data {
> *
> * @regs: Pointer to the regmap registers
> * @irq: IRQ of this SSI
> - * @cpu_dai_drv: CPU DAI driver for this device
> *
> * @dai_fmt: DAI configuration this device is currently used with
> * @streams: Mask of current active streams: BIT(TX) and BIT(RX)
> * @i2s_net: I2S and Network mode configurations of SCR register
> + * @synchronous: Use synchronous mode - both of TX and RX use STCK and SFCK
> * @use_dma: DMA is used or FIQ with stream filter
> * @use_dual_fifo: DMA with support for dual FIFO mode
> * @has_ipg_clk_name: If "ipg" is in the clock name list of device tree
> @@ -253,11 +253,11 @@ struct fsl_ssi_soc_data {
> struct fsl_ssi {
> struct regmap *regs;
> int irq;
> - struct snd_soc_dai_driver cpu_dai_drv;
>
> unsigned int dai_fmt;
> u8 streams;
> u8 i2s_net;
> + bool synchronous;
> bool use_dma;
> bool use_dual_fifo;
> bool has_ipg_clk_name;
> @@ -668,7 +668,6 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream,
> bool tx2, tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
> struct fsl_ssi *ssi = snd_soc_dai_get_drvdata(dai);
> struct regmap *regs = ssi->regs;
> - int synchronous = ssi->cpu_dai_drv.symmetric_rates, ret;
> u32 pm = 999, div2, psr, stccr, mask, afreq, factor, i;
> unsigned long clkrate, baudrate, tmprate;
> unsigned int slots = params_channels(hw_params);
> @@ -676,6 +675,7 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream,
> u64 sub, savesub = 100000;
> unsigned int freq;
> bool baudclk_is_used;
> + int ret;
>
> /* Override slots and slot_width if being specifically set... */
> if (ssi->slots)
> @@ -754,7 +754,7 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream,
> mask = SSI_SxCCR_PM_MASK | SSI_SxCCR_DIV2 | SSI_SxCCR_PSR;
>
> /* STCCR is used for RX in synchronous mode */
> - tx2 = tx || synchronous;
> + tx2 = tx || ssi->synchronous;
> regmap_update_bits(regs, REG_SSI_SxCCR(tx2), mask, stccr);
>
> if (!baudclk_is_used) {
> @@ -802,7 +802,7 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
> * that should set separate configurations for STCCR and SRCCR
> * despite running in the synchronous mode.
> */
> - if (enabled && ssi->cpu_dai_drv.symmetric_rates)
> + if (enabled && ssi->synchronous)
> return 0;
>
> if (fsl_ssi_is_i2s_master(ssi)) {
> @@ -834,7 +834,7 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
> }
>
> /* In synchronous mode, the SSI uses STCCR for capture */
> - tx2 = tx || ssi->cpu_dai_drv.symmetric_rates;
> + tx2 = tx || ssi->synchronous;
> regmap_update_bits(regs, REG_SSI_SxCCR(tx2), SSI_SxCCR_WL_MASK, wl);
>
> return 0;
> @@ -959,7 +959,7 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi *ssi, unsigned int fmt)
> srcr = strcr;
>
> /* Set SYN mode and clear RXDIR bit when using SYN or AC97 mode */
> - if (ssi->cpu_dai_drv.symmetric_rates || fsl_ssi_is_ac97(ssi)) {
> + if (ssi->synchronous || fsl_ssi_is_ac97(ssi)) {
> srcr &= ~SSI_SRCR_RXDIR;
> scr |= SSI_SCR_SYN;
> }
> @@ -1360,6 +1360,7 @@ static void fsl_ssi_imx_clean(struct platform_device *pdev, struct fsl_ssi *ssi)
>
> static int fsl_ssi_probe(struct platform_device *pdev)
> {
> + struct snd_soc_dai_driver *cpu_dai_drv;
> struct fsl_ssi *ssi;
> int ret = 0;
> struct device_node *np = pdev->dev.of_node;
> @@ -1394,14 +1395,12 @@ static int fsl_ssi_probe(struct platform_device *pdev)
> ssi->use_dma = !of_property_read_bool(np, "fsl,fiq-stream-filter");
>
> if (fsl_ssi_is_ac97(ssi)) {
> - memcpy(&ssi->cpu_dai_drv, &fsl_ssi_ac97_dai,
> - sizeof(fsl_ssi_ac97_dai));
> + cpu_dai_drv = &fsl_ssi_ac97_dai;
> fsl_ac97_data = ssi;
> } else {
> - memcpy(&ssi->cpu_dai_drv, &fsl_ssi_dai_template,
> - sizeof(fsl_ssi_dai_template));
> + cpu_dai_drv = &fsl_ssi_dai_template;
> }
> - ssi->cpu_dai_drv.name = dev_name(dev);
> + cpu_dai_drv->name = dev_name(dev);
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> iomem = devm_ioremap_resource(dev, res);
> @@ -1439,11 +1438,12 @@ static int fsl_ssi_probe(struct platform_device *pdev)
> /* Set software limitations for synchronous mode */
> if (!of_find_property(np, "fsl,ssi-asynchronous", NULL)) {
> if (!fsl_ssi_is_ac97(ssi)) {
> - ssi->cpu_dai_drv.symmetric_rates = 1;
> - ssi->cpu_dai_drv.symmetric_samplebits = 1;
> + cpu_dai_drv->symmetric_rates = 1;
> + cpu_dai_drv->symmetric_samplebits = 1;
> + ssi->synchronous = true;
> }
>
> - ssi->cpu_dai_drv.symmetric_channels = 1;
> + cpu_dai_drv->symmetric_channels = 1;
> }
>
> /* Fetch FIFO depth; Set to 8 for older DT without this property */
> @@ -1498,7 +1498,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
> }
>
> ret = devm_snd_soc_register_component(dev, &fsl_ssi_component,
> - &ssi->cpu_dai_drv, 1);
> + cpu_dai_drv, 1);
> if (ret) {
> dev_err(dev, "failed to register DAI: %d\n", ret);
> goto error_asoc_register;
>

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