linux/sound/drivers/opl4
Takashi Iwai 111b0cdb97 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 <tiwai@suse.de>
2017-06-12 08:43:33 +02:00
..
Makefile ALSA: opl4: Fix / cleanup ifdef CONFIG_PROC_FS 2015-05-29 07:49:55 +02:00
opl4_lib.c ALSA: seq: Allow the modular sequencer registration 2017-06-12 08:43:33 +02:00
opl4_local.h ALSA: seq: Allow the modular sequencer registration 2017-06-12 08:43:33 +02:00
opl4_mixer.c [ALSA] Remove xxx_t typedefs: OPL4 2006-01-03 12:18:06 +01:00
opl4_proc.c ALSA: opl4: Fix / cleanup ifdef CONFIG_PROC_FS 2015-05-29 07:49:55 +02:00
opl4_seq.c ALSA: seq: Define driver object in each driver 2015-02-12 14:15:54 +01:00
opl4_synth.c ALSA: Include linux/io.h instead of asm/io.h 2015-01-28 16:49:33 +01:00
yrw801.c [ALSA] Remove xxx_t typedefs: OPL4 2006-01-03 12:18:06 +01:00