linux-kernel - [PATCH v4 09/12] ASoC: cs35l56: Make a common function to shutdown the DSP

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Date:   Thu, 1 Jun 2023 16:47:28 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <tiwai@...e.com>, <perex@...ex.cz>, <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>,
        <patches@...nsource.cirrus.com>,
        Simon Trimmer <simont@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH v4 09/12] ASoC: cs35l56: Make a common function to shutdown the DSP

From: Simon Trimmer <simont@...nsource.cirrus.com>

Move issuing of a CS35L56_MBOX_CMD_SHUTDOWN command and then waiting for
the DSP to reach CS35L56_HALO_STATE_SHUTDOWN in the register appropriate
for the hardware revision into a common function.

Signed-off-by: Simon Trimmer <simont@...nsource.cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
Acked-by: Mark Brown <broonie@...nel.org>
---
 include/sound/cs35l56.h           |  1 +
 sound/soc/codecs/cs35l56-shared.c | 26 ++++++++++++++++++++++++++
 sound/soc/codecs/cs35l56.c        | 17 +----------------
 3 files changed, 28 insertions(+), 16 deletions(-)

diff --git a/include/sound/cs35l56.h b/include/sound/cs35l56.h
index ae9e8f55962a..5b32aa7468cb 100644
--- a/include/sound/cs35l56.h
+++ b/include/sound/cs35l56.h
@@ -274,6 +274,7 @@ extern const unsigned int cs35l56_tx_input_values[CS35L56_NUM_INPUT_SRC];
 
 void cs35l56_reread_firmware_registers(struct cs35l56_base *cs35l56_base);
 int cs35l56_mbox_send(struct cs35l56_base *cs35l56_base, unsigned int command);
+int cs35l56_firmware_shutdown(struct cs35l56_base *cs35l56_base);
 int cs35l56_wait_for_firmware_boot(struct cs35l56_base *cs35l56_base);
 void cs35l56_wait_control_port_ready(void);
 void cs35l56_wait_min_reset_pulse(void);
diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-shared.c
index 7e02d023338c..95ef71c7b8f1 100644
--- a/sound/soc/codecs/cs35l56-shared.c
+++ b/sound/soc/codecs/cs35l56-shared.c
@@ -218,6 +218,32 @@ int cs35l56_mbox_send(struct cs35l56_base *cs35l56_base, unsigned int command)
 }
 EXPORT_SYMBOL_NS_GPL(cs35l56_mbox_send, SND_SOC_CS35L56_SHARED);
 
+int cs35l56_firmware_shutdown(struct cs35l56_base *cs35l56_base)
+{
+	int ret;
+	unsigned int reg;
+	unsigned int val;
+
+	ret = cs35l56_mbox_send(cs35l56_base, CS35L56_MBOX_CMD_SHUTDOWN);
+	if (ret)
+		return ret;
+
+	if (cs35l56_base->rev < CS35L56_REVID_B0)
+		reg = CS35L56_DSP1_PM_CUR_STATE_A1;
+	else
+		reg = CS35L56_DSP1_PM_CUR_STATE;
+
+	ret = regmap_read_poll_timeout(cs35l56_base->regmap,  reg,
+				       val, (val == CS35L56_HALO_STATE_SHUTDOWN),
+				       CS35L56_HALO_STATE_POLL_US,
+				       CS35L56_HALO_STATE_TIMEOUT_US);
+	if (ret < 0)
+		dev_err(cs35l56_base->dev, "Failed to poll PM_CUR_STATE to 1 is %d (ret %d)\n",
+			val, ret);
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(cs35l56_firmware_shutdown, SND_SOC_CS35L56_SHARED);
+
 int cs35l56_wait_for_firmware_boot(struct cs35l56_base *cs35l56_base)
 {
 	unsigned int reg;
diff --git a/sound/soc/codecs/cs35l56.c b/sound/soc/codecs/cs35l56.c
index 65c8ec14f635..67173160923d 100644
--- a/sound/soc/codecs/cs35l56.c
+++ b/sound/soc/codecs/cs35l56.c
@@ -673,8 +673,6 @@ static void cs35l56_secure_patch(struct cs35l56_private *cs35l56)
 
 static void cs35l56_patch(struct cs35l56_private *cs35l56)
 {
-	unsigned int reg;
-	unsigned int val;
 	int ret;
 
 	/*
@@ -691,23 +689,10 @@ static void cs35l56_patch(struct cs35l56_private *cs35l56)
 		flush_work(&cs35l56->sdw_irq_work);
 	}
 
-	ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_SHUTDOWN);
+	ret = cs35l56_firmware_shutdown(&cs35l56->base);
 	if (ret)
 		goto err;
 
-	if (cs35l56->base.rev < CS35L56_REVID_B0)
-		reg = CS35L56_DSP1_PM_CUR_STATE_A1;
-	else
-		reg = CS35L56_DSP1_PM_CUR_STATE;
-
-	ret = regmap_read_poll_timeout(cs35l56->base.regmap, reg,
-				       val, (val == CS35L56_HALO_STATE_SHUTDOWN),
-				       CS35L56_HALO_STATE_POLL_US,
-				       CS35L56_HALO_STATE_TIMEOUT_US);
-	if (ret < 0)
-		dev_err(cs35l56->base.dev, "Failed to poll PM_CUR_STATE to 1 is %d (ret %d)\n",
-			val, ret);
-
 	/* Use wm_adsp to load and apply the firmware patch and coefficient files */
 	ret = wm_adsp_power_up(&cs35l56->dsp);
 	if (ret) {
-- 
2.30.2