ALSA: hda: cs35l41: Add module parameter to control firmware load

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@opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220630002335.366545-15-vitalyr@opensource.cirrus.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/cs35l41_hda.c

@@ -8,6 +8,7 @@
 
 #include <linux/acpi.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <sound/hda_codec.h>
 #include <sound/soc.h>
 #include <linux/pm_runtime.h>
@@ -32,6 +33,11 @@
 #define CAL_DSP_CTL_TYPE		5
 #define CAL_DSP_CTL_ALG			205
 
+static bool firmware_autostart = 1;
+module_param(firmware_autostart, bool, 0444);
+MODULE_PARM_DESC(firmware_autostart, "Allow automatic firmware download on boot"
+			     "(0=Disable, 1=Enable) (default=1); ");
+
 static const struct reg_sequence cs35l41_hda_config[] = {
 	{ CS35L41_PLL_CLK_CTRL,		0x00000430 }, // 3072000Hz, BCLK Input, PLL_REFCLK_EN = 1
 	{ CS35L41_DSP_CLK_CTRL,		0x00000003 }, // DSP CLK EN
@@ -843,11 +849,16 @@ 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 (firmware_autostart) {
+		dev_dbg(cs35l41->dev, "Firmware Autostart.\n");
+		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);
+	} else {
+		dev_dbg(cs35l41->dev, "Firmware Autostart is disabled.\n");
+	}
 
 	ret = cs35l41_create_controls(cs35l41);