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From:   Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To:     broonie@kernel.org
Cc:     alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
        lgirdwood@gmail.com,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Stephen Rothwell <sfr@canb.auug.org.au>
Subject: [PATCH v2] ASoC: codecs: wcd938x: remove incorrect module interdependency
Date:   Tue, 15 Jun 2021 14:28:29 +0100
Message-Id: <20210615132829.23067-1-srinivas.kandagatla@linaro.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

For some reason we ended up with cyclic dependency between snd_soc_wcd938x
and snd_soc_wcd938x_sdw modules.

Remove this cyclic dependency by handling them in respective modules.
Without this below error is reported during make modules_install

depmod: ERROR: Cycle detected: snd_soc_wcd938x -> snd_soc_wcd938x_sdw -> snd_soc_wcd938x
depmod: ERROR: Found 2 modules in dependency cycles!

Fixes: 045442228868 ("ASoC: codecs: wcd938x: add audio routing and Kconfig")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
Changes since v1:
	- included irq.h as x86 allmodconfig build reported implicit declaration
	 of function handle_nested_irq

 sound/soc/codecs/wcd938x-sdw.c | 20 +++++++++++++-------
 sound/soc/codecs/wcd938x.c     | 27 +++++----------------------
 sound/soc/codecs/wcd938x.h     |  4 +---
 3 files changed, 19 insertions(+), 32 deletions(-)

diff --git a/sound/soc/codecs/wcd938x-sdw.c b/sound/soc/codecs/wcd938x-sdw.c
index d82c40ec6898..d8d4caf48dc7 100644
--- a/sound/soc/codecs/wcd938x-sdw.c
+++ b/sound/soc/codecs/wcd938x-sdw.c
@@ -9,6 +9,7 @@
 #include <linux/component.h>
 #include <sound/soc.h>
 #include <linux/pm_runtime.h>
+#include <linux/irq.h>
 #include <linux/irqdomain.h>
 #include <linux/of.h>
 #include <linux/soundwire/sdw.h>
@@ -176,8 +177,19 @@ static int wcd9380_interrupt_callback(struct sdw_slave *slave,
 				      struct sdw_slave_intr_status *status)
 {
 	struct wcd938x_sdw_priv *wcd = dev_get_drvdata(&slave->dev);
+	struct irq_domain *slave_irq = wcd->slave_irq;
+	struct regmap *regmap = dev_get_regmap(&slave->dev, NULL);
+	u32 sts1, sts2, sts3;
 
-	return wcd938x_handle_sdw_irq(wcd);
+	do {
+		handle_nested_irq(irq_find_mapping(slave_irq, 0));
+		regmap_read(regmap, WCD938X_DIGITAL_INTR_STATUS_0, &sts1);
+		regmap_read(regmap, WCD938X_DIGITAL_INTR_STATUS_1, &sts2);
+		regmap_read(regmap, WCD938X_DIGITAL_INTR_STATUS_2, &sts3);
+
+	} while (sts1 || sts2 || sts3);
+
+	return IRQ_HANDLED;
 }
 
 static struct sdw_slave_ops wcd9380_slave_ops = {
@@ -239,16 +251,10 @@ static int wcd9380_probe(struct sdw_slave *pdev,
 					SDW_SCP_INT1_PARITY;
 	pdev->prop.lane_control_support = true;
 	if (wcd->is_tx) {
-		struct regmap *rm;
-
 		pdev->prop.source_ports = GENMASK(WCD938X_MAX_SWR_PORTS, 0);
 		pdev->prop.src_dpn_prop = wcd938x_dpn_prop;
 		wcd->ch_info = &wcd938x_sdw_tx_ch_info[0];
 		pdev->prop.wake_capable = true;
-
-		rm = devm_regmap_init_sdw(pdev, &wcd938x_regmap_config);
-		if (IS_ERR(rm))
-			return PTR_ERR(rm);
 	} else {
 		pdev->prop.sink_ports = GENMASK(WCD938X_MAX_SWR_PORTS, 0);
 		pdev->prop.sink_dpn_prop = wcd938x_dpn_prop;
diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c
index a2c76dc8fd89..24afe93830ce 100644
--- a/sound/soc/codecs/wcd938x.c
+++ b/sound/soc/codecs/wcd938x.c
@@ -1198,7 +1198,7 @@ static bool wcd938x_volatile_register(struct device *dev, unsigned int reg)
 	return false;
 }
 
-struct regmap_config wcd938x_regmap_config = {
+static struct regmap_config wcd938x_regmap_config = {
 	.name = "wcd938x_csr",
 	.reg_bits = 32,
 	.val_bits = 8,
@@ -1211,7 +1211,6 @@ struct regmap_config wcd938x_regmap_config = {
 	.volatile_reg = wcd938x_volatile_register,
 	.can_multi_write = true,
 };
-EXPORT_SYMBOL_GPL(wcd938x_regmap_config);
 
 static const struct regmap_irq wcd938x_irqs[WCD938X_NUM_IRQS] = {
 	REGMAP_IRQ_REG(WCD938X_IRQ_MBHC_BUTTON_PRESS_DET, 0, 0x01),
@@ -3472,24 +3471,6 @@ static int wcd938x_reset(struct wcd938x_priv *wcd938x)
 	return 0;
 }
 
-int wcd938x_handle_sdw_irq(struct wcd938x_sdw_priv *wcd)
-{
-	struct wcd938x_priv *wcd938x = wcd->wcd938x;
-	struct irq_domain *slave_irq = wcd938x->virq;
-	u32 sts1, sts2, sts3;
-
-	do {
-		handle_nested_irq(irq_find_mapping(slave_irq, 0));
-		regmap_read(wcd938x->regmap, WCD938X_DIGITAL_INTR_STATUS_0, &sts1);
-		regmap_read(wcd938x->regmap, WCD938X_DIGITAL_INTR_STATUS_1, &sts2);
-		regmap_read(wcd938x->regmap, WCD938X_DIGITAL_INTR_STATUS_2, &sts3);
-
-	} while (sts1 || sts2 || sts3);
-
-	return IRQ_HANDLED;
-}
-EXPORT_SYMBOL_GPL(wcd938x_handle_sdw_irq);
-
 static int wcd938x_codec_hw_params(struct snd_pcm_substream *substream,
 				struct snd_pcm_hw_params *params,
 				struct snd_soc_dai *dai)
@@ -3573,6 +3554,7 @@ static int wcd938x_bind(struct device *dev)
 	}
 	wcd938x->sdw_priv[AIF1_PB] = dev_get_drvdata(wcd938x->rxdev);
 	wcd938x->sdw_priv[AIF1_PB]->wcd938x = wcd938x;
+	wcd938x->sdw_priv[AIF1_PB]->slave_irq = wcd938x->virq;
 
 	wcd938x->txdev = wcd938x_sdw_device_get(wcd938x->txnode);
 	if (!wcd938x->txdev) {
@@ -3581,6 +3563,7 @@ static int wcd938x_bind(struct device *dev)
 	}
 	wcd938x->sdw_priv[AIF1_CAP] = dev_get_drvdata(wcd938x->txdev);
 	wcd938x->sdw_priv[AIF1_CAP]->wcd938x = wcd938x;
+	wcd938x->sdw_priv[AIF1_CAP]->slave_irq = wcd938x->virq;
 	wcd938x->tx_sdw_dev = dev_to_sdw_dev(wcd938x->txdev);
 	if (!wcd938x->tx_sdw_dev) {
 		dev_err(dev, "could not get txslave with matching of dev\n");
@@ -3607,8 +3590,8 @@ static int wcd938x_bind(struct device *dev)
 		return -EINVAL;
 	}
 
-	wcd938x->regmap = dev_get_regmap(wcd938x->txdev, NULL);
-	if (!wcd938x->regmap) {
+	wcd938x->regmap = devm_regmap_init_sdw(wcd938x->tx_sdw_dev, &wcd938x_regmap_config);
+	if (IS_ERR(wcd938x->regmap)) {
 		dev_err(dev, "%s: tx csr regmap not found\n", __func__);
 		return PTR_ERR(wcd938x->regmap);
 	}
diff --git a/sound/soc/codecs/wcd938x.h b/sound/soc/codecs/wcd938x.h
index 9db3ab6e47a6..07b08de4cebf 100644
--- a/sound/soc/codecs/wcd938x.h
+++ b/sound/soc/codecs/wcd938x.h
@@ -663,11 +663,9 @@ struct wcd938x_sdw_priv {
 	int num_ports;
 	bool is_tx;
 	struct wcd938x_priv *wcd938x;
+	struct irq_domain *slave_irq;
 };
 
-extern struct regmap_config wcd938x_regmap_config;
-int wcd938x_handle_sdw_irq(struct wcd938x_sdw_priv *priv);
-
 #if IS_ENABLED(CONFIG_SND_SOC_WCD938X_SDW)
 int wcd938x_sdw_free(struct wcd938x_sdw_priv *wcd,
 		     struct snd_pcm_substream *substream,
-- 
2.21.0