[PATCH v7 14/14] ALSA: hda: cs35l41: Add module parameter to control firmware load

[Vitaly Rodionov]

From: Stefan Binding <sbinding at opensource.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 at opensource.cirrus.com>
Signed-off-by: Vitaly Rodionov <vitalyr at opensource.cirrus.com>
---
 sound/pci/hda/cs35l41_hda.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index 3aa36c5ff972..4151ac5ab399 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/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
@@ -862,11 +868,16 @@ 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);
 
-- 
2.34.1