Merge tag 'asoc-v5.19' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Updates for v5.19

This is quite a big update, partly due to the addition of some larger
drivers (more of which is to follow since at least the AVS driver is
still a work in progress) and partly due to Charles' work sorting out
our handling of endianness.  As has been the case recently it's much
more about drivers than the core.

 - Overhaul of endianness specification for data formats, avoiding
   needless restrictions due to CODECs.
 - Initial stages of Intel AVS driver merge.
 - Introduction of v4 IPC mechanism for SOF.
 - TDM mode support for AK4613.
 - Support for Analog Devices ADAU1361, Cirrus Logic CS35L45, Maxim
   MAX98396, MediaTek MT8186, NXP i.MX8 micfil and SAI interfaces,
   nVidia Tegra186 ASRC, and Texas Instruments TAS2764 and TAS2780

1 files changed, 82 insertions, 4 deletions

diff --git a/sound/soc/codecs/adau1761.c b/sound/soc/codecs/adau1761.c
index fb006fc81653..8f887227981f 100644
--- a/sound/soc/codecs/adau1761.c
+++ b/sound/soc/codecs/adau1761.c
@@ -556,8 +556,6 @@ static const struct snd_soc_dapm_route adau1761_dapm_routes[] = {
 	{ "Left DAC", NULL, "Interpolator Resync Clock" },
 	{ "Right DAC", NULL, "Interpolator Resync Clock" },
 
-	{ "DSP", NULL, "Digital Clock 0" },
-
 	{ "Slew Clock", NULL, "Digital Clock 0" },
 	{ "Right Playback Mixer", NULL, "Slew Clock" },
 	{ "Left Playback Mixer", NULL, "Slew Clock" },
@@ -569,6 +567,56 @@ static const struct snd_soc_dapm_route adau1761_dapm_routes[] = {
 	{ "Digital Clock 1", NULL, "SYSCLK" },
 };
 
+static const struct snd_soc_dapm_route adau1761_dapm_dsp_routes[] = {
+	{ "DSP", NULL, "Digital Clock 0" },
+};
+
+static int adau1761_compatibility_probe(struct device *dev)
+{
+	struct adau *adau = dev_get_drvdata(dev);
+	struct regmap *regmap = adau->regmap;
+	int val, ret = 0;
+
+	/* Only consider compatibility mode when ADAU1361 was specified. */
+	if (adau->type != ADAU1361)
+		return 0;
+
+	regcache_cache_bypass(regmap, true);
+
+	/*
+	 * This will enable the core clock and bypass the PLL,
+	 * so that we can access the registers for probing purposes
+	 * (without having to set up the PLL).
+	 */
+	regmap_write(regmap, ADAU17X1_CLOCK_CONTROL,
+		ADAU17X1_CLOCK_CONTROL_SYSCLK_EN);
+
+	/*
+	 * ADAU17X1_SERIAL_SAMPLING_RATE doesn't exist in non-DSP chips;
+	 * reading it results in zero at all times, and write is a no-op.
+	 * Use this register to probe for ADAU1761.
+	 */
+	regmap_write(regmap, ADAU17X1_SERIAL_SAMPLING_RATE, 1);
+	ret = regmap_read(regmap, ADAU17X1_SERIAL_SAMPLING_RATE, &val);
+	if (ret)
+		goto exit;
+	if (val != 1)
+		goto exit;
+	regmap_write(regmap, ADAU17X1_SERIAL_SAMPLING_RATE, 0);
+	ret = regmap_read(regmap, ADAU17X1_SERIAL_SAMPLING_RATE, &val);
+	if (ret)
+		goto exit;
+	if (val != 0)
+		goto exit;
+
+	adau->type = ADAU1761_AS_1361;
+exit:
+	/* Disable core clock after probing. */
+	regmap_write(regmap, ADAU17X1_CLOCK_CONTROL, 0);
+	regcache_cache_bypass(regmap, false);
+	return ret;
+}
+
 static int adau1761_set_bias_level(struct snd_soc_component *component,
 				 enum snd_soc_bias_level level)
 {
@@ -823,7 +871,11 @@ static int adau1761_component_probe(struct snd_soc_component *component)
 	if (ret)
 		return ret;
 
-	if (adau->type == ADAU1761) {
+	/*
+	 * If we've got an ADAU1761, or an ADAU1761 operating as an
+	 * ADAU1361, we need these non-DSP related DAPM widgets and routes.
+	 */
+	if (adau->type == ADAU1761 || adau->type == ADAU1761_AS_1361) {
 		ret = snd_soc_dapm_new_controls(dapm, adau1761_dapm_widgets,
 			ARRAY_SIZE(adau1761_dapm_widgets));
 		if (ret)
@@ -834,7 +886,29 @@ static int adau1761_component_probe(struct snd_soc_component *component)
 		if (ret)
 			return ret;
 	}
-
+	/*
+	 * These routes are DSP related and only used when we have a
+	 * bona fide ADAU1761.
+	 */
+	if (adau->type == ADAU1761) {
+		ret = snd_soc_dapm_add_routes(dapm, adau1761_dapm_dsp_routes,
+			ARRAY_SIZE(adau1761_dapm_dsp_routes));
+		if (ret)
+			return ret;
+	}
+	/*
+	 * In the ADAU1761, by default, the AIF is routed to the DSP, whereas
+	 * for the ADAU1361, the AIF is permanently routed to the ADC and DAC.
+	 * Thus, if we have an ADAU1761 masquerading as an ADAU1361,
+	 * we need to explicitly route the AIF to the ADC and DAC.
+	 * For the ADAU1761, this is normally done by set_tdm_slot, but this
+	 * function is not necessarily called during stream setup, so set up
+	 * the compatible AIF routings here from the start.
+	 */
+	if  (adau->type == ADAU1761_AS_1361) {
+		regmap_write(adau->regmap, ADAU17X1_SERIAL_INPUT_ROUTE, 0x01);
+		regmap_write(adau->regmap, ADAU17X1_SERIAL_OUTPUT_ROUTE, 0x01);
+	}
 	ret = adau17x1_add_routes(component);
 	if (ret < 0)
 		return ret;
@@ -919,6 +993,10 @@ int adau1761_probe(struct device *dev, struct regmap *regmap,
 	if (ret)
 		return ret;
 
+	ret = adau1761_compatibility_probe(dev);
+	if (ret)
+		return ret;
+
 	/* Enable cache only mode as we could miss writes before bias level
 	 * reaches standby and the core clock is enabled */
 	regcache_cache_only(regmap, true);