From: Arnd Bergmann arnd@arndb.de

With SND_SOC_ALL_CODECS=y and SND_SOC_WCD938X_SDW=m, there is a link error from a reverse dependency, since the built-in codec driver calls into the modular soundwire back-end:

x86_64-linux-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_codec_free': wcd938x.c:(.text+0x2c0): undefined reference to `wcd938x_sdw_free' x86_64-linux-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_codec_hw_params': wcd938x.c:(.text+0x2f6): undefined reference to `wcd938x_sdw_hw_params' x86_64-linux-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_codec_set_sdw_stream': wcd938x.c:(.text+0x332): undefined reference to `wcd938x_sdw_set_sdw_stream' x86_64-linux-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_tx_swr_ctrl': wcd938x.c:(.text+0x23de): undefined reference to `wcd938x_swr_get_current_bank' x86_64-linux-ld: sound/soc/codecs/wcd938x.o: in function `wcd938x_bind': wcd938x.c:(.text+0x2579): undefined reference to `wcd938x_sdw_device_get' x86_64-linux-ld: wcd938x.c:(.text+0x25a1): undefined reference to `wcd938x_sdw_device_get' x86_64-linux-ld: wcd938x.c:(.text+0x262a): undefined reference to `__devm_regmap_init_sdw'

Work around this using two small hacks: An added Kconfig dependency prevents the main driver from being built-in when soundwire support itself is a loadable module to allow calling devm_regmap_init_sdw(), and a Makefile trick links the wcd938x-sdw backend as built-in if needed to solve the dependency between the two modules.

Fixes: 045442228868 ("ASoC: codecs: wcd938x: add audio routing and Kconfig") Signed-off-by: Arnd Bergmann arnd@arndb.de --- I saw this on -rc2, please ignore if this is already fixed --- sound/soc/codecs/Kconfig | 1 + sound/soc/codecs/Makefile | 5 ++++- 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 7ebae3f09435..459deba31485 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -1558,6 +1558,7 @@ config SND_SOC_WCD934X

config SND_SOC_WCD938X tristate + depends on SOUNDWIRE || !SOUNDWIRE

config SND_SOC_WCD938X_SDW tristate "WCD9380/WCD9385 Codec - SDW" diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index de8b83dd2c76..7bb38c370842 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -583,7 +583,10 @@ obj-$(CONFIG_SND_SOC_WCD_MBHC) += snd-soc-wcd-mbhc.o obj-$(CONFIG_SND_SOC_WCD9335) += snd-soc-wcd9335.o obj-$(CONFIG_SND_SOC_WCD934X) += snd-soc-wcd934x.o obj-$(CONFIG_SND_SOC_WCD938X) += snd-soc-wcd938x.o -obj-$(CONFIG_SND_SOC_WCD938X_SDW) += snd-soc-wcd938x-sdw.o +ifdef CONFIG_SND_SOC_WCD938X_SDW +# avoid link failure by forcing sdw code built-in when needed +obj-$(CONFIG_SND_SOC_WCD938X) += snd-soc-wcd938x-sdw.o +endif obj-$(CONFIG_SND_SOC_WL1273) += snd-soc-wl1273.o obj-$(CONFIG_SND_SOC_WM0010) += snd-soc-wm0010.o obj-$(CONFIG_SND_SOC_WM1250_EV1) += snd-soc-wm1250-ev1.o