linux-kernel - [PATCH v2 26/26] ALSA: hda: cs35l41: Add kernel config to disable firmware autoload

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Date:   Mon, 9 May 2022 22:47:03 +0100
From:   Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
To:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        Mark Brown <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <patches@...nsource.cirrus.com>,
        <linux-kernel@...r.kernel.org>,
        Stefan Binding <sbinding@...nsource.cirrus.com>
Subject: [PATCH v2 26/26] ALSA: hda: cs35l41: Add kernel config to disable firmware autoload

From: Stefan Binding <sbinding@...nsource.cirrus.com>

By default, the driver will automatically load DSP firmware
for the amps, if available. Adding this option allows the
autoload to be optional, which allows for different configurations.

Signed-off-by: Stefan Binding <sbinding@...nsource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@...nsource.cirrus.com>
---
 sound/pci/hda/Kconfig       |  7 +++++++
 sound/pci/hda/cs35l41_hda.c | 12 +++++++-----
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
index 1c378cca5dac..c4282dec4dd4 100644
--- a/sound/pci/hda/Kconfig
+++ b/sound/pci/hda/Kconfig
@@ -94,6 +94,13 @@ config SND_HDA_PATCH_LOADER
 config SND_HDA_SCODEC_CS35L41
 	tristate
 
+config SND_HDA_SCODEC_CS35L41_DISABLE_FIRMWARE_AUTOSTART
+	bool "Prevent CS35L41 from starting firmware on boot"
+	depends on SND_HDA_SCODEC_CS35L41
+	help
+	  Say Y here to prevent the CS35L41 HDA driver from loading DSP
+	  Firmware at boot
+
 config SND_HDA_CS_DSP_CONTROLS
 	tristate
 	depends on CS_DSP
diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index 70e5354e3950..8b9e966145b5 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -773,11 +773,13 @@ static int cs35l41_hda_bind(struct device *dev, struct device *master, void *mas
 
 	cs35l41->firmware_type = HDA_CS_DSP_FW_SPK_PROT;
 
-	cs35l41->request_fw_load = true;
-	mutex_lock(&cs35l41->fw_mutex);
-	if (cs35l41_smart_amp(cs35l41) < 0)
-		dev_warn(cs35l41->dev, "Cannot Run Firmware, reverting to dsp bypass...\n");
-	mutex_unlock(&cs35l41->fw_mutex);
+	if (!IS_ENABLED(CONFIG_SND_HDA_SCODEC_CS35L41_DISABLE_FIRMWARE_AUTOSTART)) {
+		cs35l41->request_fw_load = true;
+		mutex_lock(&cs35l41->fw_mutex);
+		if (cs35l41_smart_amp(cs35l41) < 0)
+			dev_warn(cs35l41->dev, "Cannot Run Firmware, reverting to dsp bypass...\n");
+		mutex_unlock(&cs35l41->fw_mutex);
+	}
 
 	cs35l41_create_controls(cs35l41);
 
-- 
2.34.1