On KBL platform, the microphone is attached to external codec(rt5514)
instead of PCH. However, TDM slot between PCH and codec is 16 bits only.
In order to avoid setting wrong format, we should add a constraint to
force to use 16 bits format forever.
Signed-off-by: Yu-Hsuan Hsu <[email protected]>
---
I have updated the commit message. Please see whether it is clear
enough. Thanks.
sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
index 74dda8784f1a01..67b276a65a8d2d 100644
--- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
@@ -400,6 +400,9 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream)
snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
dmic_constraints);
+ runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
+ snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
+
return snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
}
--
2.23.0.351.gc4317032e6-goog
Hi all,
Does anyone have time to review this patch? It should be easy to
review because it just a format constraint.
Thanks,
Yu-Hsuan
Yu-Hsuan Hsu <[email protected]> 於 2019年9月24日 週二 上午12:29寫道：
>
> On KBL platform, the microphone is attached to external codec(rt5514)
> instead of PCH. However, TDM slot between PCH and codec is 16 bits only.
> In order to avoid setting wrong format, we should add a constraint to
> force to use 16 bits format forever.
>
> Signed-off-by: Yu-Hsuan Hsu <[email protected]>
> ---
> I have updated the commit message. Please see whether it is clear
> enough. Thanks.
> sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
> index 74dda8784f1a01..67b276a65a8d2d 100644
> --- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
> +++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
> @@ -400,6 +400,9 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream)
> snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> dmic_constraints);
>
> + runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
> + snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
> +
> return snd_pcm_hw_constraint_list(substream->runtime, 0,
> SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
> }
> --
> 2.23.0.351.gc4317032e6-goog
>
On 9/23/19 11:29 AM, Yu-Hsuan Hsu wrote:
> On KBL platform, the microphone is attached to external codec(rt5514)
> instead of PCH. However, TDM slot between PCH and codec is 16 bits only.
> In order to avoid setting wrong format, we should add a constraint to
> force to use 16 bits format forever.
>
> Signed-off-by: Yu-Hsuan Hsu <[email protected]>
> ---
> I have updated the commit message. Please see whether it is clear
> enough. Thanks.
Sorry, I missed this patch. Looks ok, though the 'right' approach would
be to have topology and/or copiers deal with format changes.
Acked-by: Pierre-Louis Bossart <[email protected]>
> sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
> index 74dda8784f1a01..67b276a65a8d2d 100644
> --- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
> +++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
> @@ -400,6 +400,9 @@ static int kabylake_dmic_startup(struct snd_pcm_substream *substream)
> snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
> dmic_constraints);
>
> + runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
> + snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
> +
> return snd_pcm_hw_constraint_list(substream->runtime, 0,
> SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
> }
>