diff options
Diffstat (limited to 'sound/soc/fsl/fsl_ssi.c')
| -rw-r--r-- | sound/soc/fsl/fsl_ssi.c | 62 |
1 files changed, 41 insertions, 21 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index dbcde106adca..ac786601b9d6 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -160,11 +160,11 @@ struct fsl_ssi_private { unsigned int dai_fmt; bool use_dma; - bool baudclk_locked; bool use_dual_fifo; u8 i2s_mode; struct clk *baudclk; struct clk *clk; + unsigned int baudclk_streams; unsigned int bitclk_freq; struct snd_dmaengine_dai_dma_data dma_params_tx; struct snd_dmaengine_dai_dma_data dma_params_rx; @@ -495,9 +495,6 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream, struct fsl_ssi_private *ssi_private = snd_soc_dai_get_drvdata(rtd->cpu_dai); - if (!dai->active && !fsl_ssi_is_ac97(ssi_private)) - ssi_private->baudclk_locked = false; - /* When using dual fifo mode, it is safer to ensure an even period * size. If appearing to an odd number while DMA always starts its * task from fifo0, fifo1 would be neglected at the end of each @@ -530,6 +527,7 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, unsigned long clkrate, baudrate, tmprate; u64 sub, savesub = 100000; unsigned int freq; + bool baudclk_is_used; /* Prefer the explicitly set bitclock frequency */ if (ssi_private->bitclk_freq) @@ -541,6 +539,8 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, if (IS_ERR(ssi_private->baudclk)) return -EINVAL; + baudclk_is_used = ssi_private->baudclk_streams & ~(BIT(substream->stream)); + /* It should be already enough to divide clock by setting pm alone */ psr = 0; div2 = 0; @@ -553,7 +553,11 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, continue; tmprate = freq * factor * (i + 2); - clkrate = clk_round_rate(ssi_private->baudclk, tmprate); + + if (baudclk_is_used) + clkrate = clk_get_rate(ssi_private->baudclk); + else + clkrate = clk_round_rate(ssi_private->baudclk, tmprate); do_div(clkrate, factor); afreq = (u32)clkrate / (i + 1); @@ -598,13 +602,12 @@ static int fsl_ssi_set_bclk(struct snd_pcm_substream *substream, else write_ssi_mask(&ssi->srccr, mask, stccr); - if (!ssi_private->baudclk_locked) { + if (!baudclk_is_used) { ret = clk_set_rate(ssi_private->baudclk, baudrate); if (ret) { dev_err(cpu_dai->dev, "failed to set baudclk rate\n"); return -EINVAL; } - ssi_private->baudclk_locked = true; } return 0; @@ -656,6 +659,15 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream, ret = fsl_ssi_set_bclk(substream, cpu_dai, hw_params); if (ret) return ret; + + /* Do not enable the clock if it is already enabled */ + if (!(ssi_private->baudclk_streams & BIT(substream->stream))) { + ret = clk_prepare_enable(ssi_private->baudclk); + if (ret) + return ret; + + ssi_private->baudclk_streams |= BIT(substream->stream); + } } /* @@ -683,6 +695,22 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream, return 0; } +static int fsl_ssi_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *cpu_dai) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct fsl_ssi_private *ssi_private = + snd_soc_dai_get_drvdata(rtd->cpu_dai); + + if (fsl_ssi_is_i2s_master(ssi_private) && + ssi_private->baudclk_streams & BIT(substream->stream)) { + clk_disable_unprepare(ssi_private->baudclk); + ssi_private->baudclk_streams &= ~BIT(substream->stream); + } + + return 0; +} + static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private, unsigned int fmt) { @@ -692,6 +720,11 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private, ssi_private->dai_fmt = fmt; + if (fsl_ssi_is_i2s_master(ssi_private) && IS_ERR(ssi_private->baudclk)) { + dev_err(&ssi_private->pdev->dev, "baudclk is missing which is necessary for master mode\n"); + return -EINVAL; + } + fsl_ssi_setup_reg_vals(ssi_private); scr = read_ssi(&ssi->scr) & ~(CCSR_SSI_SCR_SYN | CCSR_SSI_SCR_I2S_MODE_MASK); @@ -912,11 +945,6 @@ static int fsl_ssi_trigger(struct snd_pcm_substream *substream, int cmd, fsl_ssi_tx_config(ssi_private, false); else fsl_ssi_rx_config(ssi_private, false); - - if (!fsl_ssi_is_ac97(ssi_private) && (read_ssi(&ssi->scr) & - (CCSR_SSI_SCR_TE | CCSR_SSI_SCR_RE)) == 0) - ssi_private->baudclk_locked = false; - break; default: @@ -948,6 +976,7 @@ static int fsl_ssi_dai_probe(struct snd_soc_dai *dai) static const struct snd_soc_dai_ops fsl_ssi_dai_ops = { .startup = fsl_ssi_startup, .hw_params = fsl_ssi_hw_params, + .hw_free = fsl_ssi_hw_free, .set_fmt = fsl_ssi_set_dai_fmt, .set_sysclk = fsl_ssi_set_dai_sysclk, .set_tdm_slot = fsl_ssi_set_dai_tdm_slot, @@ -1087,8 +1116,6 @@ static int fsl_ssi_imx_probe(struct platform_device *pdev, if (IS_ERR(ssi_private->baudclk)) dev_dbg(&pdev->dev, "could not get baud clock: %ld\n", PTR_ERR(ssi_private->baudclk)); - else - clk_prepare_enable(ssi_private->baudclk); /* * We have burstsize be "fifo_depth - 2" to match the SSI @@ -1139,9 +1166,6 @@ static int fsl_ssi_imx_probe(struct platform_device *pdev, return 0; error_pcm: - if (!IS_ERR(ssi_private->baudclk)) - clk_disable_unprepare(ssi_private->baudclk); - clk_disable_unprepare(ssi_private->clk); return ret; @@ -1152,8 +1176,6 @@ static void fsl_ssi_imx_clean(struct platform_device *pdev, { if (!ssi_private->use_dma) imx_pcm_fiq_exit(pdev); - if (!IS_ERR(ssi_private->baudclk)) - clk_disable_unprepare(ssi_private->baudclk); clk_disable_unprepare(ssi_private->clk); } @@ -1248,8 +1270,6 @@ static int fsl_ssi_probe(struct platform_device *pdev) /* Older 8610 DTs didn't have the fifo-depth property */ ssi_private->fifo_depth = 8; - ssi_private->baudclk_locked = false; - dev_set_drvdata(&pdev->dev, ssi_private); if (ssi_private->soc->imx) { |
