RE: [PATCH V3] ASoC: add a flag to reverse the stop sequence

[AMD Public Use]

-----Original Message----- From: Vijendar Mukunda vijendar.mukunda@amd.com Sent: Thursday, July 8, 2021 1:55 PM To: broonie@kernel.org; alsa-devel@alsa-project.org Cc: amistry@google.com; nartemiev@google.com; Deucher, Alexander Alexander.Deucher@amd.com; Hiregoudar, Basavaraj Basavaraj.Hiregoudar@amd.com; Dommati, Sunil-kumar <Sunil- kumar.Dommati@amd.com>; Mukunda, Vijendar Vijendar.Mukunda@amd.com; Liam Girdwood lgirdwood@gmail.com; Jaroslav Kysela perex@perex.cz; Takashi Iwai tiwai@suse.com; Chuhong Yuan hslester96@gmail.com; Kuninori Morimoto kuninori.morimoto.gx@renesas.com; open list <linux- kernel@vger.kernel.org> Subject: [PATCH V3] ASoC: add a flag to reverse the stop sequence

From: Vijendar Mukunda Vijendar.Mukunda@amd.com

On stream stop, currently CPU DAI stop sequence invoked first followed by DMA. For Few platforms, it is required to stop the DMA first before stopping CPU DAI.

For Stoneyridge platform, it is required to invoke DMA driver stop first rather than invoking DWC I2S controller stop. Introduced new flag in dai_link structure for reordering stop sequence. Based on flag check, ASoC core will re-order the stop sequence.

You should add a fixes tag as well for stable: Fixes: 4378f1fbe92405 ("ASoC: soc-pcm: Use different sequence for start/stop trigger")

Alex

Signed-off-by: Vijendar Mukunda Vijendar.Mukunda@amd.com

v2 -> v3: moved "stop_dma_first" flag from card structure to dai_link structure and modified code to use "stop_dma_first" flag. v1 -> v2: renamed flag as "stop_dma_fist" fixed build error by removing extra + symbol sound/soc/soc-pcm.c:1019:3: error: expected expression before 'struct' 1019 | + struct snd_soc_card *card = rtd->card;

include/sound/soc.h | 6 ++++++ sound/soc/amd/acp-da7219-max98357a.c | 5 +++++ sound/soc/soc-pcm.c | 22 ++++++++++++++++------ 3 files changed, 27 insertions(+), 6 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h index 675849d07284..8e6dd8a257c5 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -712,6 +712,12 @@ struct snd_soc_dai_link { /* Do not create a PCM for this DAI link (Backend link) */ unsigned int ignore:1;

• /* This flag will reorder stop sequence. By enabling this flag

• * DMA controller stop sequence will be invoked first followed by
  

• * CPU DAI driver stop sequence
  

• */
  

• unsigned int stop_dma_first:1;

#ifdef CONFIG_SND_SOC_TOPOLOGY struct snd_soc_dobj dobj; /* For topology */ #endif diff --git a/sound/soc/amd/acp-da7219-max98357a.c b/sound/soc/amd/acp-da7219- max98357a.c index 84e3906abd4f..9449fb40a956 100644 --- a/sound/soc/amd/acp-da7219-max98357a.c +++ b/sound/soc/amd/acp-da7219-max98357a.c @@ -576,6 +576,7 @@ static struct snd_soc_dai_link cz_dai_5682_98357[] = { | SND_SOC_DAIFMT_CBM_CFM, .init = cz_rt5682_init, .dpcm_playback = 1,

• .stop_dma_first = 1,
  

  .ops = &cz_rt5682_play_ops, SND_SOC_DAILINK_REG(designware1, rt5682, platform), },

@@ -585,6 +586,7 @@ static struct snd_soc_dai_link cz_dai_5682_98357[] = { .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM, .dpcm_capture = 1,

• .stop_dma_first = 1,
  

  .ops = &cz_rt5682_cap_ops, SND_SOC_DAILINK_REG(designware2, rt5682, platform), },

@@ -594,6 +596,7 @@ static struct snd_soc_dai_link cz_dai_5682_98357[] = { .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM, .dpcm_playback = 1,

• .stop_dma_first = 1,
  

  .ops = &cz_rt5682_max_play_ops, SND_SOC_DAILINK_REG(designware3, mx, platform), },

@@ -604,6 +607,7 @@ static struct snd_soc_dai_link cz_dai_5682_98357[] = { .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM, .dpcm_capture = 1,

• .stop_dma_first = 1,
  

  .ops = &cz_rt5682_dmic0_cap_ops, SND_SOC_DAILINK_REG(designware3, adau, platform), },

@@ -614,6 +618,7 @@ static struct snd_soc_dai_link cz_dai_5682_98357[] = { .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM, .dpcm_capture = 1,

• .stop_dma_first = 1,
  

  .ops = &cz_rt5682_dmic1_cap_ops, SND_SOC_DAILINK_REG(designware2, adau, platform), },

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 46513bb97904..d1c570ca21ea 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -1015,6 +1015,7 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,

static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) {

• struct snd_soc_pcm_runtime *rtd =

asoc_substream_to_rtd(substream); int ret = -EINVAL, _ret = 0; int rollback = 0;

@@ -1055,14 +1056,23 @@ static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd) case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_PAUSE_PUSH:

• ret = snd_soc_pcm_dai_trigger(substream, cmd, rollback);
  

• if (ret < 0)
  

• 	break;
  

• if (rtd->dai_link->stop_dma_first) {
  

• 	ret = snd_soc_pcm_component_trigger(substream,
  

cmd, rollback);

• 	if (ret < 0)
  

• 		break;
  
  

• ret = snd_soc_pcm_component_trigger(substream, cmd,
  

rollback);

• if (ret < 0)
  

• 	break;
  

• 	ret = snd_soc_pcm_dai_trigger(substream, cmd,
  

rollback);

• 	if (ret < 0)
  

• 		break;
  

• } else {
  

• 	ret = snd_soc_pcm_dai_trigger(substream, cmd,
  

rollback);

• 	if (ret < 0)
  

• 		break;
  
  

• 	ret = snd_soc_pcm_component_trigger(substream,
  

cmd, rollback);

• 	if (ret < 0)
  

• 		break;
  

• }
  

  ret = snd_soc_link_trigger(substream, cmd, rollback); break; }

-- 2.17.1