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ASoC: sdm845: add support to update TDM CLK frequency at runtime

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TDM CLK frequency needs to be updated at runtime to use the correct
CLK setup.

Change-Id: Ib42fedca3cbf41b85ca121ca04cc994bf8ad4d39
Signed-off-by: Xiaoyu Ye <benyxy@codeaurora.org>
This commit is contained in:
Xiaoyu Ye
2017-09-01 14:57:51 -07:00
parent 2b6adc8ba1
commit f48af4ff1f
1 changed files with 9 additions and 1 deletions
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10
asoc/sdm845.c
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@@ -4492,7 +4492,7 @@ static int sdm845_tdm_snd_hw_params(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int ret = 0;
int channels, slot_width, slots;
unsigned int slot_mask;
unsigned int slot_mask, rate, clk_freq;
unsigned int slot_offset[8] = {0, 4, 8, 12, 16, 20, 24, 28};
pr_debug("%s: dai id = 0x%x\n", __func__, cpu_dai->id);
@@ -4524,8 +4524,16 @@ static int sdm845_tdm_snd_hw_params(struct snd_pcm_substream *substream,
} else {
pr_err("%s: invalid use case, err:%d\n",
__func__, ret);
goto end;
}
rate = params_rate(params);
clk_freq = rate * slot_width * slots;
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, clk_freq, SND_SOC_CLOCK_OUT);
if (ret < 0)
pr_err("%s: failed to set tdm clk, err:%d\n",
__func__, ret);
end:
return ret;
}