linux-kernel - [PATCH v4 17/17] ALSA: hda: cs35l41: Add module parameter to control firmware load

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 25 May 2022 14:16:38 +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 v4 17/17] ALSA: hda: cs35l41: Add module parameter to control firmware load

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>
---

Changes since v2:
 - Added module paramter to control firmware loading
 
 sound/pci/hda/cs35l41_hda.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/sound/pci/hda/cs35l41_hda.c b/sound/pci/hda/cs35l41_hda.c
index 4a164b7ebab1..c836323a8aaf 100644
--- a/sound/pci/hda/cs35l41_hda.c
+++ b/sound/pci/hda/cs35l41_hda.c
@@ -33,6 +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
@@ -817,11 +822,16 @@ 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");
+	}
 
 	cs35l41_create_controls(cs35l41);
 
-- 
2.34.1