From 111b0cdb97d44cfe5dec1338a78ba8aff65c32e2 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 9 Jun 2017 15:11:58 +0200 Subject: ALSA: seq: Allow the modular sequencer registration Many drivers bind the sequencer stuff in off-load by another driver module, so that it's loaded only on demand. In the current code, this mechanism doesn't work when the driver is built-in while the sequencer is module. We check with IS_REACHABLE() and enable only when the sequencer is in the same level of build. However, this is basically a overshoot. The binder code (snd-seq-device) is an individual module from the sequencer core (snd-seq), and we just have to make the former a built-in while keeping the latter a module for allowing the scenario like the above. This patch achieves that by rewriting Kconfig slightly. Now, a driver that provides the manual sequencer device binding should select CONFIG_SND_SEQ_DEVICE in a way as select SND_SEQ_DEVICE if SND_SEQUENCER != n Note that the "!=n" is needed here to avoid the influence of the sequencer core is module while the driver is built-in. Also, since rawmidi.o may be linked with snd_seq_device.o when built-in, we have to shuffle the code to make the linker happy. (the kernel linker isn't smart enough yet to handle such a case.) That is, snd_seq_device.c is moved to sound/core from sound/core/seq, as well as Makefile. Last but not least, the patch replaces the code using IS_REACHABLE() with IS_ENABLED(), since now the condition meets always when enabled. Signed-off-by: Takashi Iwai --- sound/drivers/Kconfig | 2 ++ 1 file changed, 2 insertions(+) (limited to 'sound/drivers/Kconfig') diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig index 0e3dc80a7262..7144cc36e8ae 100644 --- a/sound/drivers/Kconfig +++ b/sound/drivers/Kconfig @@ -6,11 +6,13 @@ config SND_OPL3_LIB tristate select SND_TIMER select SND_HWDEP + select SND_SEQ_DEVICE if SND_SEQUENCER != n config SND_OPL4_LIB tristate select SND_TIMER select SND_HWDEP + select SND_SEQ_DEVICE if SND_SEQUENCER != n # select SEQ stuff to min(SND_SEQUENCER,SND_XXX) config SND_OPL3_LIB_SEQ -- cgit v1.2.3-58-ga151