CS35L41 amplifiers in an ASUS Zenbook on linux

cs35l41_spi.md

Asus Zenbook UX3402 speakers on Linux

Important

THIS IS NOW OBSOLETE WITH KERNEL VERSIONS ≥ 6.7.0

A recent announcement in the kernel mail list by Cirrus developers will solve the problem described here. Therefore, the proposed solutions will be soon obsolete. See this comment (thanks, @flukejones, for the tip).

I got the speakers working on my Asus Zenbook 14 OLED UX3402, the one with Intel CPU and the two CS35L41 audio amplifiers connected over SPI (not the UM3402YA, with AMD and I²C). The amplifiers are supported by the snd_hda_scodec_cs35l41 module in recent kernel versions, but they require some model-specific configuration paramaters, that should be provided by the BIOS, via ACPI. Of course, they are missing. It seems that the Windows drivers have those parameters somehow hardcoded, instead of using ACPI (bad idea, but who am I to criticise). Since Asus has been nasty and refused/was not able to update the BIOS with the missing data, I have patched the ACPI tables myself.

Warning

As stated by Cirrus developers, if you try this there is a non-zero (low, I hope) possibility of blowing your speakers. Take into account that this procedure is not just configuring your box, it is hardware-level hacking with very scarce information about the hardware (thank you, ASUS, and thank you, Cirrus, for not publishing the CS35L41 datasheet and making it only available by request). Additionally, You should know how to work with DSDT or SSDT files (I have a brief guide here) and how to recover from a non booting system. You are on your own. You have been warned.

Note

I have used the patch for some months, and everything seems OK. As you can see, the most recent versions do not require electrical parameters to be specified, just providing the functions of several GPIO pins, that are already present in the original BIOS, and the behavior associated to them. I am almost sure that the patch is totally safe.

My BIOS is the most recent one (version 310). I have added two _DSD objects in the SSDT file (ssdt_csc3551.dsl, or its already assembled version, ssdt_csc3551.aml):

• One inside the SPK1 device, providing the missing "cirrus,dev-index" and other properties, just like the I2C models. You can also provide these properties by patching the kernel module (the linux/sound/pci/hda/cs35l41_hda.c file).

• Another one, after the SPK1 device, with the chip select GPIOs, "cs-gpios", required by the SPI bus (the somehow simpler I²C bus does not use chip select pins, but addresses). Without this _DSD object, only one amplifier can be addressed and activated. In this case, the driver refuses to load even for this single working amplifier.

Obsolete: DSDT patch

Instead of applying a SSDT file, you may patch the full DSDT dissassembled DSDT file (dsdt.dsl). This was my original solution (thanks to @thor2002ro for pointing to the simpler, nicer SSDT solution, see the comment, especially if you use grub). The patch is available for reference, just apply the SSDT file.

Obsolete: internal boost

I keep the old, original patch, that produced AMP short error messages when the volume was high enough, for reference. Please try first the simpler patch with external boost, that seems to work without flaws (thanks to @bdandy, see the comment).

Boot log

Output from journalctl -b -g CSC3551 --output short-monotonic after the old patch:

[5.358062] zenbook kernel: Serial bus multi instantiate pseudo device driver CSC3551:00: Instantiated 2 SPI devices.
[5.643640] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: Cirrus Logic CS35L41 (35a40), Revision: B2
[5.680302] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: Cirrus Logic CS35L41 (35a40), Revision: B2
[5.996217] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: Falling back to default firmware.
[5.996608] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: Firmware version: 3
[5.996611] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: cirrus/cs35l41-dsp1-spk-prot.wmfw: Fri 24 Jun 2022 14:55:56 GMT Daylight Time
[6.069598] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: Firmware: 400a4 vendor: 0x2 v0.58.0, 2 algorithms
[6.070173] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: 0: ID cd v29.78.0 XM@94 YM@e
[6.070185] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: 1: ID f20b v0.1.0 XM@17c YM@0
[6.070192] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: spk-prot: e:\workspace\workspace\tibranch_release_playback_6.76_2\ormis\staging\default_tunings\internal\CS35L53\Fixed_Attenuation_Mono_48000_29.78.0\full\Fixed_Attenuation_Mono_48000_29.78.0_full.bin
[6.083485] zenbook kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi1-CSC3551:00-cs35l41-hda.0 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])
[6.083899] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: Falling back to default firmware.
[6.083962] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: Firmware version: 3
[6.083966] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: cirrus/cs35l41-dsp1-spk-prot.wmfw: Fri 24 Jun 2022 14:55:56 GMT Daylight Time
[6.145224] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: Firmware: 400a4 vendor: 0x2 v0.58.0, 2 algorithms
[6.145817] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: 0: ID cd v29.78.0 XM@94 YM@e
[6.145828] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: 1: ID f20b v0.1.0 XM@17c YM@0
[6.145834] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: spk-prot: e:\workspace\workspace\tibranch_release_playback_6.76_2\ormis\staging\default_tunings\internal\CS35L53\Fixed_Attenuation_Mono_48000_29.78.0\full\Fixed_Attenuation_Mono_48000_29.78.0_full.bin
[6.161484] zenbook kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi1-CSC3551:00-cs35l41-hda.1 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])

The "Falling back to default firmware" disappears if spk-id-gpios are provided (the block is commented in the patch). As a result, a different firmware is loaded, resulting in very low volume and strong distortion. If the new patch is used, that uses external boost, the sound is correct, and the log is

[0.004000] zenbook kernel: ACPI: Table Upgrade: install [SSDT-CUSTOM- CSC3551]
[0.004000] zenbook kernel: ACPI: SSDT 0x00000000368FD000 0001A0 (v01 CUSTOM CSC3551  00000001 INTL 20200925)
[5.607253] zenbook kernel: Serial bus multi instantiate pseudo device driver CSC3551:00: Instantiated 2 SPI devices.
[5.906936] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: Cirrus Logic CS35L41 (35a40), Revision: B2
[5.907354] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: Reset line busy, assuming shared reset
[5.938136] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: Cirrus Logic CS35L41 (35a40), Revision: B2
[6.239406] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: Firmware version: 3
[6.239415] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: cirrus/cs35l41-dsp1-spk-prot-10431e02.wmfw: Fri 27 Aug 2021 14:58:19 W. Europe Daylight Time
[6.313109] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: Firmware: 400a4 vendor: 0x2 v0.43.1, 2 algorithms
[6.313524] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: 0: ID cd v29.63.1 XM@94 YM@e
[6.313530] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: 1: ID f20b v0.1.0 XM@176 YM@0
[6.313535] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: spk-prot: C:\Users\tyang\Desktop\Product Setting\SmartAMP\ASUS\ASUS_Zenbook\UX3402\Tuning Release\220304\ASUS_UX3402_L_tuning_IDYC_ReDc_PICL_RTL_0304.bin
[6.337211] zenbook kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi1-CSC3551:00-cs35l41-hda.0 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])
[6.337534] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: Firmware version: 3
[6.337540] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: cirrus/cs35l41-dsp1-spk-prot-10431e02.wmfw: Fri 27 Aug 2021 14:58:19 W. Europe Daylight Time
[6.399070] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: Firmware: 400a4 vendor: 0x2 v0.43.1, 2 algorithms
[6.399612] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: 0: ID cd v29.63.1 XM@94 YM@e
[6.399623] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: 1: ID f20b v0.1.0 XM@176 YM@0
[6.399629] zenbook kernel: cs35l41-hda spi1-CSC3551:00-cs35l41-hda.1: DSP1: spk-prot: C:\Users\tyang\Desktop\Product Setting\SmartAMP\ASUS\ASUS_Zenbook\UX3402\Tuning Release\220304\ASUS_UX3402_R_tuning_IDYC_ReDc_PICL_RTL_0304.bin
[6.427637] zenbook kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi1-CSC3551:00-cs35l41-hda.1 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])

dsdt.dsl-old.patch

--- dsdt.dsl.old	2023-03-26 01:06:48.845795666 +0100
+++ dsdt.dsl	2023-03-26 12:00:45.643851841 +0200
@@ -18,7 +18,7 @@
  *     Compiler ID      "INTL"
  *     Compiler Version 0x20200717 (538969879)
  */
-DefinitionBlock ("", "DSDT", 2, "_ASUS_", "Notebook", 0x01072009)
+DefinitionBlock ("", "DSDT", 2, "_ASUS_", "Notebook", 0x0107200A)
 {
     /*
      * iASL Warning: There were 233 external control methods found during
@@ -90642,7 +90642,48 @@
             Method (_DIS, 0, NotSerialized)  // _DIS: Disable Device
             {
             }
+
+            Name (_DSD, Package ()   // _DSD: Device-Specific Data
+            {
+                ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), 
+                Package ()
+                {
+                    Package () { "cirrus,dev-index", Package () { Zero, One }},
+                    Package () { "reset-gpios", Package () {
+                       SPK1, One, Zero, Zero,
+                       SPK1, One, Zero, Zero,
+                    } },
+                    // Package () { "spk-id-gpios", Package () {
+                    //    SPK1, 0x02, Zero, Zero,
+                    //    SPK1, 0x02, Zero, Zero,
+                    // } },
+                    Package () { "cirrus,speaker-position",     Package () { Zero, One } },
+                    Package () { "cirrus,gpio1-func",           Package () { Zero, Zero } },
+                    Package () { "cirrus,gpio2-func",           Package () { 0x02, 0x02 } },
+                    // boost-type: 0 internal, 1 external
+                    Package () { "cirrus,boost-type",           Package () { Zero, Zero } },
+                    // boost-peak-milliamp: 1600 to 4500, increments of 50 mA
+                    Package () { "cirrus,boost-peak-milliamp",  Package () { 4500, 4500 } },
+                    // boost-ind-nanohenry: 1000 | 1200 | 1500 | 2200 nH
+                    Package () { "cirrus,boost-ind-nanohenry",  Package () { 1000, 1000 } },
+                    // boost-cap-microfarad: rounded to the nearest integer
+                    Package () { "cirrus,boost-cap-microfarad", Package () { 24, 24 } },
+                },
+            })
         }
+
+        Name (_DSD, Package ()
+        {
+            ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), 
+            Package ()
+            {
+                Package () { "cs-gpios", Package () { 
+                    Zero,                    // Native CS
+                    SPK1, Zero, Zero, Zero   // GPIO CS
+                } }
+            }
+        })
+
     }
 
     Scope (_SB.PC00.LPCB)

dsdt.dsl.patch

--- dsdt.dsl.old	2023-03-26 01:06:48.845795666 +0100
+++ dsdt.dsl	2023-03-26 12:00:45.643851841 +0200
@@ -18,7 +18,7 @@
  *     Compiler ID      "INTL"
  *     Compiler Version 0x20200717 (538969879)
  */
-DefinitionBlock ("", "DSDT", 2, "_ASUS_", "Notebook", 0x01072009)
+DefinitionBlock ("", "DSDT", 2, "_ASUS_", "Notebook", 0x0107200A)
 {
     /*
      * iASL Warning: There were 233 external control methods found during
@@ -90642,7 +90642,43 @@
             Method (_DIS, 0, NotSerialized)  // _DIS: Disable Device
             {
             }
+
+            Name (_DSD, Package ()   // _DSD: Device-Specific Data
+            {
+                ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), 
+                Package ()
+                {
+                    Package () { "cirrus,dev-index", Package () { Zero, One }},
+                    Package () { "reset-gpios", Package () {
+                       SPK1, One, Zero, Zero,
+                       SPK1, One, Zero, Zero,
+                    } },
+                    Package () { "spk-id-gpios", Package () {
+                       SPK1, 0x02, Zero, Zero,
+                       SPK1, 0x02, Zero, Zero,
+                    } },
+                    Package () { "cirrus,speaker-position",     Package () { Zero, One } },
+                    // gpioX-func: 0 not used, 1 VPSK_SWITCH, 2: INTERRUPT, 3: SYNC
+                    Package () { "cirrus,gpio1-func",           Package () { One, One } },
+                    Package () { "cirrus,gpio2-func",           Package () { 0x02, 0x02 } },
+                    // boost-type: 0 internal, 1 external
+                    Package () { "cirrus,boost-type",           Package () { One, One } },
+                },
+            })
         }
+
+        Name (_DSD, Package ()
+        {
+            ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), 
+            Package ()
+            {
+                Package () { "cs-gpios", Package () { 
+                    Zero,                    // Native CS
+                    SPK1, Zero, Zero, Zero   // GPIO CS
+                } }
+            }
+        })
+
     }
 
     Scope (_SB.PC00.LPCB)

ssdt_csc3551.aml

ssdt_csc3551.dsl

DefinitionBlock ("", "SSDT", 1, "CUSTOM", "CSC3551", 0x00000001)
{
    External (_SB_.PC00.SPI0, DeviceObj)
    External (_SB_.PC00.SPI0.SPK1, DeviceObj)

    Scope (_SB.PC00.SPI0.SPK1)
    {
        Name (_DSD, Package ()
        {
            ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
            Package ()
            {
                Package () { "cirrus,dev-index", Package () { Zero, One }},
                Package () { "reset-gpios", Package () {
                    SPK1, One, Zero, Zero,
                    SPK1, One, Zero, Zero
                } },
                Package () { "spk-id-gpios", Package () {
                    SPK1, 0x02, Zero, Zero,
                    SPK1, 0x02, Zero, Zero
                } },
                Package () { "cirrus,speaker-position", Package () { Zero, One } },
                // gpioX-func: 0 not used, 1 VPSK_SWITCH, 2: INTERRUPT, 3: SYNC
                Package () { "cirrus,gpio1-func", Package () { One, One } },
                Package () { "cirrus,gpio2-func", Package () { 0x02, 0x02 } },
                // boost-type: 0 internal, 1 external
                Package () { "cirrus,boost-type", Package () { One, One } }
            }
        })
    }

    Scope (_SB.PC00.SPI0)
    {
        Name (_DSD, Package ()
        {
            ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
            Package ()
            {
                Package () { "cs-gpios", Package () { 
                    Zero,                    // Native CS
                    SPK1, Zero, Zero, Zero   // GPIO CS
                } }
            }
        })
    }
}

Could any of this be re-used to enable the second pair of bass speakers on a Dell XPS 15 9530, which also uses the same chip?
Thanks!

TL:DR; already done, coming in 6.8

Me and some other community members did it, but even though we submitted the patch, Cirrus changed their framework, and right after added their own support for xps 9530. They also just merged firmware/tuning files few days back. XPS 9530 also has a firmware bug which caps SPI speed, and thus firmware loading wouldve take ~3mins. I made a patch and it got accepted, should be coming in 6.8

Edit: most of development happened here on discord server

I've just submitted the patch to the maintainer list.

@kenzoi Any idea when this will be available?

Fixed on UM3504 as well, at long last!!

Hi,
I have strange sound conflict on ROG 713PV 2023 with Firefox browser. When i visit page which wants to play DRM content (same time VLC is playing some of mp3 track) , i have additional noise on speakers. As soon i close such web page noise is disappear.
Does anybody have similar problems? Can anybody suggest what i have to do to fix that?

• remove the dsd patching

• remove /boot/grub2/grubenv if it exists

Why do we need to do these two things if the patches will override them anyways? @flukejones

just found that link up in a comment regarding low volume:

latin-1/um5302ta#8 (comment)

ATM I have no opprtunity to check. Does it work for you to do the steps as mentioned there..?

$ cd /tmp
$ git clone https://gitlab.com/asus-linux/firmware
$ cd firmware
$ sudo cp -r cirrus /lib/firmware/

Did you end up checking? Doesn't seem to work for me.

I can confirm that this patch is obsolete with Linux Kernel >= 6.7. I'm running Ubuntu 23.10 (dual-boot with Windows 11) with a ROG Strix G18 laptop (G814JZ) and the latest nvidia-driver-545 installed (and I've also tested with nvidia-driver-535). I used the mainline GUI/CLI tool to install Kernel 6.7.2. I followed the instructions here to sign my kernel for Secure Boot, and I was then able to boot successfully! 🚀 The built-in laptop audio works flawlessly for me now, and my NVidia card is working smoothly and supporting my Samsung Thunderbolt display nicely.

Thank you, Cirrus open source!

Did you end up checking? Doesn't seem to work for me.

It works for me, thx = )

Any idea when this will be available?

@isle9 I've resubmitted today because of a small difference related to the latest branch. I think this (UX3402VA model)
will be available on Linux 6.8

I have got my speakers working on my UX3402VA on Ubuntu with the 6.7.2 mainline kernel and applying the ssdt patch, but the volume is way too low and that's why I've also downloaded the firmware using this guide: Firmware. The volume is still way too low. This is the ID for the device: E: PCI_SUBSYS_ID=1043:16A3
Any fix for this on my device?
Edit: It seems to still be falling back to default firmware.

[    3.896842] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: Cirrus Logic CS35L41 (35a40), Revision: B2
[    3.906683] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: Reset line busy, assuming shared reset
[    3.944156] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: Cirrus Logic CS35L41 (35a40), Revision: B2
[    5.313758] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: Falling back to default firmware.
[    5.314678] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: Firmware version: 3
[    5.314685] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: cirrus/cs35l41-dsp1-spk-prot.wmfw: Fri 24 Jun 2022 14:55:56 GMT Daylight Time
[    5.388399] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: Firmware: 400a4 vendor: 0x2 v0.58.0, 2 algorithms
[    5.389088] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: cirrus/cs35l41-dsp1-spk-prot.bin: v0.58.0
[    5.389098] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: spk-prot: e:\workspace\workspace\tibranch_release_playback_6.76_2\ormis\staging\default_tunings>
[    5.404412] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: CS35L41 Bound - SSID: 104316A3, BST: 1, VSPK: 1, CH: L, FW EN: 1, SPKID: 0
[    5.404423] UbuntuTop kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi0-CSC3551:00-cs35l41-hda.0 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])
[    5.404707] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: Falling back to default firmware.
[    5.405036] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: Firmware version: 3
[    5.405039] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: cirrus/cs35l41-dsp1-spk-prot.wmfw: Fri 24 Jun 2022 14:55:56 GMT Daylight Time
[    5.467265] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: Firmware: 400a4 vendor: 0x2 v0.58.0, 2 algorithms
[    5.468338] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: cirrus/cs35l41-dsp1-spk-prot.bin: v0.58.0
[    5.468347] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: spk-prot: e:\workspace\workspace\tibranch_release_playback_6.76_2\ormis\staging\default_tunings>
[    5.490012] UbuntuTop kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: CS35L41 Bound - SSID: 104316A3, BST: 1, VSPK: 1, CH: R, FW EN: 1, SPKID: 0
[    5.490026] UbuntuTop kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi0-CSC3551:00-cs35l41-hda.1 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])```

@HARDWELL9191 the ssdt patch is an older solution, from before the recent kernel rework.
But to be honest I don't know if this impact the volume somehow, I think not since the values in the ssdt patch and kernel table probably are the same.

I've created this basic instruction on how I applied the kernel patch on linux 6.7.2 using Fedora.
The patch was accepted today by one of the sound.git maintainers. I hope that soon we won't need it anymore.

@kenzoi I checked using this guide if my device was actually in the kernel and it wasn't so I suppose that's why my sound didn't work until I applied the SSDT patch, but the volume with the patch is still too low and falls back to default firmware. Idk why, maybe someone can tell me if there's a fix for this without building a kernel myself. Otherwise I'll just wait for the 6.8 kernel to come out ;)

Has anyone managed to get something working on the UM3402YA yet? Neither kernel 6.7.4 or any combination of the patches here I've tried have done the trick so far.

Has anyone managed to get something working on the UM3402YA yet? Neither kernel 6.7.4 or any combination of the patches here I've tried have done the trick so far.

You may be in trouble with the reset_gpio field, I am using ROG STRIX though. I have a similar patch for my laptop. It worked before, but it suddenly had misfunctions today.

It turns out that the BIOS setting of the boot logo sound is causing this problem (I changed it today).

If the boot logo sound is enabled, the reset-gpios filed should be

Package () { "reset-gpios", Package () {
	SPK1, One, Zero, Zero,
	SPK1, One, Zero, Zero,
} },

If disabled, the field should be

Package () { "reset-gpios", Package () {
	SPK1, Zero, Zero, Zero,
	SPK1, Zero, Zero, Zero,
} },

@kenzoi as per torvalds/linux@c16dfab, this patch should be released in the v6.8-rc6. I tried installing this on my UX3405MA and had no luck.

In my case, the audio works but the volume is really low (compared to windows), like speech is barely audible - like 20% of windows volume. There was no difference in installing v6.8-rc6 and v6.7.x

[    6.172395] fedora kernel: Serial bus multi instantiate pseudo device driver CSC3551:00: Instantiated 2 SPI devices.
[    6.441606] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: Cirrus Logic CS35L41 (35a40), Revision: B2
[    6.441834] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: Reset line busy, assuming shared reset
[    6.475276] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: Cirrus Logic CS35L41 (35a40), Revision: B2
[    7.011838] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: Falling back to default firmware.
[    7.015348] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: Firmware version: 3
[    7.015353] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: cirrus/cs35l41-dsp1-spk-prot.wmfw: Fri 24 Jun 2022 14:55:56 GMT Daylight Time
[    7.146892] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: Firmware: 400a4 vendor: 0x2 v0.58.0, 2 algorithms
[    7.148120] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: cirrus/cs35l41-dsp1-spk-prot.bin: v0.58.0
[    7.148125] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: spk-prot: e:\workspace\workspace\tibranch_release_playback_6.76_2\ormis\staging\default_tunings\in>
[    7.161724] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: CS35L41 Bound - SSID: 10431A63, BST: 1, VSPK: 1, CH: L, FW EN: 1, SPKID: -19
[    7.161731] fedora kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi0-CSC3551:00-cs35l41-hda.0 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])
[    7.164371] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: Falling back to default firmware.
[    7.166774] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: Firmware version: 3
[    7.166777] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: cirrus/cs35l41-dsp1-spk-prot.wmfw: Fri 24 Jun 2022 14:55:56 GMT Daylight Time
[    7.284208] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: Firmware: 400a4 vendor: 0x2 v0.58.0, 2 algorithms
[    7.285221] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: cirrus/cs35l41-dsp1-spk-prot.bin: v0.58.0
[    7.285231] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: DSP1: spk-prot: e:\workspace\workspace\tibranch_release_playback_6.76_2\ormis\staging\default_tunings\in>
[    7.300136] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.1: CS35L41 Bound - SSID: 10431A63, BST: 1, VSPK: 0, CH: R, FW EN: 1, SPKID: -19
[    7.300146] fedora kernel: snd_hda_codec_realtek ehdaudio0D0: bound spi0-CSC3551:00-cs35l41-hda.1 (ops cs35l41_hda_comp_ops [snd_hda_scodec_cs35l41])
[  321.135983] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: Failed to read 256 bytes from 2800620: -16
[  667.964185] fedora kernel: cs35l41-hda spi0-CSC3551:00-cs35l41-hda.0: DSP1: Failed to read 256 bytes from 2800620: -16

@lonk42 I have sound working on UM3402YA with kernel 6.7 using this SSDT file.

@lonk42 I have sound working on UM3402YA with kernel 6.7 using this SSDT file.

Awesome that one works!

Following. Have the same problem with UX3405MA and default firmware error. Running the 6.8-rc7 kernel.

As a workaround for Linux Mint 21.3 and Asus Zenbook 14 UX3402VA I've installed 6.7.7 kernel from Zabbly repo. However, microphone on my wire headset stopped working (no sound can be detected) on that kernel. Is there any workaround for that?

@kenzoi Still the same issue with default firmware fallback error and low sound on 6.8...

On a fresh installation, are we supposed to do any extra step (like SSDT patching) apart from installing linux 6.8 kernel?

@slayerjain @kenzoi Yep I've been having the volume issue as well. With both the ssdt patch before and in the 6.8 rc6 kernel now as well on my UX3402VA. It falls back to default firmware for some reason. Max volume on linux is like being at 20% on windows and if you try going past that with pavucontrol, the sound just gets distorted af. Hopefully someone can find a fix for this so we can actually get solid sound out of our laptops. It's literally the only thing that's holding me back from permanently switching to linux on my laptop and just remove my dual boot. I need me some good music sometimes ;)

For 10431A63 - UX3405MA.304
@tholden92 @slayerjain and whoever else with one might want to test.
The following patch/hack works for me
and also confirmed different firmware being loaded / fallback messages fixed.

[ 11.160796] cs35l41-hda spi1-CSC3551:00-cs35l41-hda.0: DSP1: spk-prot: C:\Users\tyang\Desktop\Product Setting\SmartAMP\ASUS\ASUS_Zenbook\2023Projects\UX3405MA\Tuning_release\06082023\UX3405UM_19p5dB_Mock_NM_Lch_finish_ID_6p83_US_Xmax0p65.bin

For context: In bios version 304 pretty much all the config is present (confirmed via dumping and looking at ssdt16),
except for "spk-id-gpios". The patch below should force creation of only that GPIO in the driver - which doesnt seem to account for the case where a DSD is present but only 99% complete, hence the hack to skip that check
since I know the 1 missing gpio still needs to be initialized and isnt present in DSD.

https://gist.github.com/steffengy/aa48549f40c37acf85de7a7f9a6c0475

Tried to apply the patch, but got an error message.

Setting version...
Applying patch linux-v6.8.2-arch2.patch...
patching file Makefile
patching file arch/Kconfig
patching file drivers/firmware/sysfb.c
patching file drivers/net/xen-netfront.c
patching file include/linux/user_namespace.h
patching file init/Kconfig
patching file kernel/fork.c
patching file kernel/sysctl.c
patching file kernel/user_namespace.c
Applying patch sound-fix.patch...
patching file sound/pci/hda/cs35l41_hda_property.c
Hunk #1 succeeded at 85 with fuzz 1.
Hunk #2 FAILED at 232.
Hunk #3 FAILED at 240.
Hunk #4 succeeded at 423 with fuzz 1.
2 out of 4 hunks FAILED -- saving rejects to file sound/pci/hda/cs35l41_hda_property.c.rej

This is how the reject file looks like

    --- /dev/null
    +++ sound/pci/hda/cs35l41_hda_property.c    2024-04-03 12:27:54.540979240 +0100
    @@ -232,3 +233,3 @@
     
    -       if (!dsd_found) {
    +       // if (!dsd_found) {
                    ret = cs35l41_add_gpios(cs35l41, physdev, cfg->reset_gpio_index,
    @@ -240,6 +241,6 @@
                    }
    -       } else if (cfg->reset_gpio_index >= 0 || cfg->spkid_gpio_index >= 0) {
    +       /*} else if (cfg->reset_gpio_index >= 0 || cfg->spkid_gpio_index >= 0) {
                    dev_warn(cs35l41->dev, "Cannot add Reset/Speaker ID/SPI CS GPIO Mapping, "
                             "_DSD already exists.\n");
    -       }
    +       }*/

@tholden92 Updated above with gist with more patch context, as the "short" version doesnt seem to apply well.

I can confirm that the patch works :-)

Edit: Forked a PKGBUILD from the CachyOS kernel and added your patch for anyone that wants to test.

https://aur.archlinux.org/packages/linux-cachyos-zenbook

I recently bought a UX3402V and ran into the "no speaker sound" issue after installing Kubuntu. I was able to fix it by updating the kernel (using 6.7.10), but then observed the very low volume levels noted by others. I also saw kernel messages that the default firmware was loading.

This commit to the linux-firmware package is supposed to add the firmware links for my hardware (1043:16a3). After creating these links, no change was observed and the default firmware was still loaded.

I noticed that the links created by that patch use an upper case "A" (e.g. cs35l41-dsp1-spk-cali-104316A3.wmfw) in the filename which is different from all the other firmware files, so I recreated all the links using "104316a3" in the filenames. This worked: firmware was loaded and volume levels are back to normal. It appears this is a bug in the current linux-firmware package for this hardware.

As a workaround for Linux Mint 21.3 and Asus Zenbook 14 UX3402VA I've installed 6.7.7 kernel from Zabbly repo. However, microphone on my wire headset stopped working (no sound can be detected) on that kernel. Is there any workaround for that?

There is a similar issue with UX3402ZA. I have Mint 5.15/Arch 6.8 dual boot.
5.15 kernel is the last kernel where headset microphone is working properly. But it have no fix for a speaker.
6.8 kernel has speaker fix but headset microphone is broken.
I tried to find a fix for a broken microphone few months earlier but without a luck.
You could try to go this rabbit hole. But it's an advanced topic and I had no motivation to spend days on replicating the solution. https://asus-linux.org/blog/sound-2021-01-11/

BTW, guys with UX3402ZA/UX3402VA, could you please check is headset mic working properly in your laptops with 6.7+ kernels?

BTW, guys with UX3402ZA/UX3402VA, could you please check is headset mic working properly in your laptops with 6.7+ kernels?

@pave
Bluetooth ones work, but they worked even before 6.8 for me, so maybe there's some other issue that's causing it.