[AMD Official Use Only - Internal Distribution Only]
-----Original Message----- From: Agrawal, Akshu Akshu.Agrawal@amd.com Sent: Friday, March 20, 2020 9:39 AM To: RAVULAPATI, VISHNU VARDHAN RAO Vishnuvardhanrao.Ravulapati@amd.com Cc: Deucher, Alexander Alexander.Deucher@amd.com; broonie@kernel.org; Liam Girdwood lgirdwood@gmail.com; Jaroslav Kysela perex@perex.cz; Takashi Iwai tiwai@suse.com; Agrawal, Akshu Akshu.Agrawal@amd.com; Wei Yongjun weiyongjun1@huawei.com; moderated list:SOUND - SOC LAYER / DYNAMIC AUDIO POWER MANAGEM... alsa-devel@alsa-project.org; open list linux-kernel@vger.kernel.org Subject: Re: [PATCH] ASoC: amd: Changing Audio Format does not reflect.
On 3/19/2020 4:52 PM, Ravulapati Vishnu vardhan rao wrote:
When you run aplay subsequently as below by changing the stream format:
aplay -Dhw:2,0 -c2 -fS16_LE -r48000 /dev/zero -vv -d 5;aplay -Dhw:2,0 -c2 -fS24_LE -r48000 /dev/zero -vv as a single command, the format gets corrupted and audio does not play.
So clear the ACP_(I2S/BT)TDM_ITER/IRER register when dma stops.
Signed-off-by: Ravulapati Vishnu vardhan rao
Vishnuvardhanrao.Ravulapati@amd.com
sound/soc/amd/raven/acp3x-i2s.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/sound/soc/amd/raven/acp3x-i2s.c b/sound/soc/amd/raven/acp3x-i2s.c index 3a3c47e..b07c50a 100644 --- a/sound/soc/amd/raven/acp3x-i2s.c +++ b/sound/soc/amd/raven/acp3x-i2s.c @@ -240,9 +240,7 @@ static int acp3x_i2s_trigger(struct snd_pcm_substream *substream, reg_val = mmACP_I2STDM_IRER; } }
val = rv_readl(rtd->acp3x_base + reg_val);val = val & ~BIT(0);rv_writel(val, rtd->acp3x_base + reg_val);
rv_writel(0, rtd->acp3x_base + reg_val);
Clearing the entire register might result in issues.
IMO better fix is to have a sample_len mask for ITER and IRER register.
Use it to clear sample length bits in acp3x_i2s_hwparams function before setting the new format resolution.
Thanks,
Akshu
When stream is open once again all the values will be set. So with clearing ITER/IRER to 0 when device closes there will be no issues.
-Vishnu