From: Arnd Bergmann <arnd@arndb.de>

The ace2x driver can optionally use the HDA infrastructure, but can still
build without that. However, with SND_HDA_CORE=m and SND_HDA_ALIGNED_MMIO=y,
it fails to link as built-in:

aarch64-linux-ld: drivers/soundwire/intel_ace2x.o: in function `intel_shim_wake':
intel_ace2x.c:(.text+0x2518): undefined reference to `snd_hdac_aligned_read'
aarch64-linux-ld: intel_ace2x.c:(.text+0x25d4): undefined reference to `snd_hdac_aligned_read'
aarch64-linux-ld: intel_ace2x.c:(.text+0x268c): undefined reference to `snd_hdac_aligned_write'

Add a Kconfig dependency that forces the soundwire driver to be a loadable
module if necessary.

Fixes: 79e7123c078d ("soundwire: intel_ace2x: fix wakeup handling")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
I saw this build failure only once, but don't know if this is a recent regression
or was originally caused by the 79e7123c078d commit.
---
 drivers/soundwire/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soundwire/Kconfig b/drivers/soundwire/Kconfig
index ad56393e4c93..196a7daaabdb 100644
--- a/drivers/soundwire/Kconfig
+++ b/drivers/soundwire/Kconfig
@@ -40,6 +40,7 @@ config SOUNDWIRE_INTEL
 	select AUXILIARY_BUS
 	depends on ACPI && SND_SOC
 	depends on SND_SOC_SOF_HDA_MLINK || !SND_SOC_SOF_HDA_MLINK
+	depends on SND_HDA_CORE || !SND_HDA_ALIGNED_MMIO
 	help
 	  SoundWire Intel Master driver.
 	  If you have an Intel platform which has a SoundWire Master then
-- 
2.39.5

On Tue, 23 Dec 2025 22:50:01 +0100, Arnd Bergmann wrote:
> The ace2x driver can optionally use the HDA infrastructure, but can still
> build without that. However, with SND_HDA_CORE=m and SND_HDA_ALIGNED_MMIO=y,
> it fails to link as built-in:
> 
> aarch64-linux-ld: drivers/soundwire/intel_ace2x.o: in function `intel_shim_wake':
> intel_ace2x.c:(.text+0x2518): undefined reference to `snd_hdac_aligned_read'
> aarch64-linux-ld: intel_ace2x.c:(.text+0x25d4): undefined reference to `snd_hdac_aligned_read'
> aarch64-linux-ld: intel_ace2x.c:(.text+0x268c): undefined reference to `snd_hdac_aligned_write'
> 
> [...]

Applied, thanks!

[1/1] soundwire: intel_ace2x: add SND_HDA_CORE dependency
      commit: dddbe80536f3676b9b14a034058c81a1798fe374

Best regards,
-- 
~Vinod