Add set_bais_level function for rt5682s codec to enable bclk and lrclk before codec widgets power on and disable bclk and lrclk after widgets power down, to avoid pop noise

Signed-off-by: Venkata Prasad Potturu venkataprasad.potturu@amd.com --- sound/soc/amd/acp/acp-mach-common.c | 62 ++++++++++++++++++++++++++--- 1 file changed, 56 insertions(+), 6 deletions(-)

diff --git a/sound/soc/amd/acp/acp-mach-common.c b/sound/soc/amd/acp/acp-mach-common.c index 4c69cb6e3400..a78cf29387a7 100644 --- a/sound/soc/amd/acp/acp-mach-common.c +++ b/sound/soc/amd/acp/acp-mach-common.c @@ -167,11 +167,14 @@ static int acp_card_hs_startup(struct snd_pcm_substream *substream) &constraints_channels); snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &constraints_rates); - if (!drvdata->soc_mclk) { - ret = acp_clk_enable(drvdata); - if (ret < 0) { - dev_err(rtd->card->dev, "Failed to enable HS clk: %d\n", ret); - return ret; + + if (strcmp(codec_dai->name, "rt5682s-aif1") && strcmp(codec_dai->name, "rt5682s-aif2")) { + if (!drvdata->soc_mclk) { + ret = acp_clk_enable(drvdata); + if (ret < 0) { + dev_err(rtd->card->dev, "Failed to enable HS clk: %d\n", ret); + return ret; + } } }

@@ -280,7 +283,6 @@ static int acp_card_rt5682s_init(struct snd_soc_pcm_runtime *rtd)

static const struct snd_soc_ops acp_card_rt5682s_ops = { .startup = acp_card_hs_startup, - .shutdown = acp_card_shutdown, };

static const unsigned int dmic_channels[] = { @@ -570,6 +572,52 @@ SND_SOC_DAILINK_DEF(sof_dmic, SND_SOC_DAILINK_DEF(pdm_dmic, DAILINK_COMP_ARRAY(COMP_CPU("acp-pdm-dmic")));

+static int acp_rtk_set_bias_level(struct snd_soc_card *card, + struct snd_soc_dapm_context *dapm, + enum snd_soc_bias_level level) +{ + struct snd_soc_component *component = dapm->component; + struct acp_card_drvdata *drvdata = card->drvdata; + int ret = 0; + + if (!component) + return 0; + + if (strncmp(component->name, "i2c-RTL5682", 11) && + strncmp(component->name, "i2c-10EC1019", 12)) + return 0; + + /* + * For Realtek's codec and amplifier components, + * the lrck and bclk must be enabled brfore their all dapms be powered on, + * and must be disabled after their all dapms be powered down + * to avoid any pop. + */ + switch (level) { + case SND_SOC_BIAS_STANDBY: + if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_OFF) { + clk_set_rate(drvdata->wclk, 48000); + clk_set_rate(drvdata->bclk, 48000 * 64); + + /* Increase bclk's enable_count */ + ret = clk_prepare_enable(drvdata->bclk); + if (ret < 0) + dev_err(component->dev, "Failed to enable bclk %d\n", ret); + } else { + /* + * Decrease bclk's enable_count. + * While the enable_count is 0, the bclk would be closed. + */ + clk_disable_unprepare(drvdata->bclk); + } + break; + default: + break; + } + + return ret; +} + int acp_sofdsp_dai_links_create(struct snd_soc_card *card) { struct snd_soc_dai_link *links; @@ -730,6 +778,7 @@ int acp_sofdsp_dai_links_create(struct snd_soc_card *card)

card->dai_link = links; card->num_links = num_links; + card->set_bias_level = acp_rtk_set_bias_level;

return 0; } @@ -907,6 +956,7 @@ int acp_legacy_dai_links_create(struct snd_soc_card *card)

card->dai_link = links; card->num_links = num_links; + card->set_bias_level = acp_rtk_set_bias_level;

return 0; }