Message ID | 20220307141041.27538-4-alifer.m@variscite.com (mailing list archive) |
---|---|
State | Handled Elsewhere |
Headers | show |
Series | [1/4] ASoC: fsl-asoc-card: add WM8904 support | expand |
Context | Check | Description |
---|---|---|
snowpatch_ozlabs/github-powerpc_clang | success | Successfully ran 7 jobs. |
snowpatch_ozlabs/github-powerpc_sparse | success | Successfully ran 4 jobs. |
snowpatch_ozlabs/github-powerpc_kernel_qemu | success | Successfully ran 24 jobs. |
> > > > Just for my understanding, are you suggesting to set a device tree > > > > property to force a fixed behavior in the driver ? > > > Yes. > > Why should we use a fixed behavior ? > The things that are fixed by the design should be fixed. > > > The device shares pins between the line inputs and the DMIC inputs so at > > > least some of the configuration is going to be determinted at system > > > design time, that will fix the usable values of at least one of the > > > controls which ought to be reflected in the runtime behaviour. > > In our design we use: > > - pin 1: DMIC_CLK > > - pin 24: LINEIN2R > > - pin 26: LINEIN2L > > - pin 27: DMIC_DATA > > we have no pins shared among DMIC and LINEIN. > This means that DMICDAT2 is not usefully selectable at runtime, you've > got IN1 as digital and IN2 as analogue, so while the DMIC/ADC switch is > useful the DMIC1/2 switch is not. A customer could have the following working configuration - pin 1: DMIC_CLK - pin 24: LINEIN2R - pin 25: DMICDAT2 - pin 26: LINEIN2L - pin 27: DMICDAT1 with no shared pins: here there's the chance to select DMIC1, DMIC2 and LINEIN2 at runtime: I can't find a reason for a fixed behavior. Can you please elaborate ?
On Mon, Jun 20, 2022 at 07:53:56PM +0000, Pierluigi Passaro wrote: > > This means that DMICDAT2 is not usefully selectable at runtime, you've > > got IN1 as digital and IN2 as analogue, so while the DMIC/ADC switch is > > useful the DMIC1/2 switch is not. > A customer could have the following working configuration > - pin 1: DMIC_CLK > - pin 24: LINEIN2R > - pin 25: DMICDAT2 > - pin 26: LINEIN2L > - pin 27: DMICDAT1 > with no shared pins: here there's the chance to select DMIC1, DMIC2 and > LINEIN2 at runtime: I can't find a reason for a fixed behavior. > Can you please elaborate ? So in that case the driver should offer the DMIC1/2 selection. The driver should be looking at which pins are wired up as DMICs and only registering controls that can actually be used in the system based on the pins that are wired up.
diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c index 4121771db104..c7987dc81e4d 100644 --- a/sound/soc/codecs/wm8904.c +++ b/sound/soc/codecs/wm8904.c @@ -837,6 +837,26 @@ static int out_pga_event(struct snd_soc_dapm_widget *w, return 0; } +static const char *dmic_text[] = { + "DMIC1", "DMIC2" +}; + +static SOC_ENUM_SINGLE_DECL(dmic_enum, + WM8904_DIGITAL_MICROPHONE_0, 11, dmic_text); + +static const struct snd_kcontrol_new dmic_mux = + SOC_DAPM_ENUM("DMIC Mux", dmic_enum); + +static const char *cin_text[] = { + "ADC", "DMIC" +}; + +static SOC_ENUM_SINGLE_DECL(cin_enum, + WM8904_DIGITAL_MICROPHONE_0, 12, cin_text); + +static const struct snd_kcontrol_new cin_mux = + SOC_DAPM_ENUM("Capture Input", cin_enum); + static const char *input_mode_text[] = { "Single-Ended", "Differential Line", "Differential Mic" }; @@ -930,6 +950,10 @@ SND_SOC_DAPM_INPUT("IN2R"), SND_SOC_DAPM_INPUT("IN3L"), SND_SOC_DAPM_INPUT("IN3R"), +SND_SOC_DAPM_MUX("DMIC Mux", SND_SOC_NOPM, 0, 0, &dmic_mux), +SND_SOC_DAPM_MUX("Left Capture Input", SND_SOC_NOPM, 0, 0, &cin_mux), +SND_SOC_DAPM_MUX("Right Capture Input", SND_SOC_NOPM, 0, 0, &cin_mux), + SND_SOC_DAPM_SUPPLY("MICBIAS", WM8904_MIC_BIAS_CONTROL_0, 0, 0, NULL, 0), SND_SOC_DAPM_MUX("Left Capture Mux", SND_SOC_NOPM, 0, 0, &lin_mux), @@ -1093,11 +1117,21 @@ static const struct snd_soc_dapm_route adc_intercon[] = { { "AIFOUTL", NULL, "AIFOUTL Mux" }, { "AIFOUTR", NULL, "AIFOUTR Mux" }, + { "DMIC Mux", "DMIC1", "IN1L" }, + { "DMIC Mux", "DMIC2", "IN1R" }, + + { "Left Capture Input", "ADC", "Left Capture PGA" }, + { "Left Capture Input", "DMIC", "DMIC Mux" }, + { "Right Capture Input", "ADC", "Right Capture PGA" }, + { "Right Capture Input", "DMIC", "DMIC Mux" }, + { "ADCL", NULL, "CLK_DSP" }, { "ADCL", NULL, "Left Capture PGA" }, + { "ADCL", NULL, "Left Capture Input" }, { "ADCR", NULL, "CLK_DSP" }, { "ADCR", NULL, "Right Capture PGA" }, + { "ADCR", NULL, "Right Capture Input" }, }; static const struct snd_soc_dapm_route dac_intercon[] = {