ALSA: hda - Use IS_REACHABLE() for dependency on input

The commit ffcd28d88e4f ("ALSA: hda - Select INPUT for Realtek
HD-audio codec") introduced the reverse-selection of CONFIG_INPUT for
Realtek codec in order to avoid the mess with dependency between
built-in and modules.  Later on, we obtained IS_REACHABLE() macro
exactly for this kind of problems, and now we can remove th INPUT
selection in Kconfig and put IS_REACHABLE(INPUT) to the appropriate
places in the code, so that the driver doesn't need to select other
subsystem forcibly.

Fixes: ffcd28d88e4f ("ALSA: hda - Select INPUT for Realtek HD-audio codec")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # and build-tested
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 5 insertions, 1 deletions

diff --git a/sound/pci/hda/Kconfig b/sound/pci/hda/Kconfig
index 7f3b5ed81995..f7a492c382d9 100644
--- a/sound/pci/hda/Kconfig
+++ b/sound/pci/hda/Kconfig
@@ -88,7 +88,6 @@ config SND_HDA_PATCH_LOADER
 config SND_HDA_CODEC_REALTEK
         tristate "Build Realtek HD-audio codec support"
         select SND_HDA_GENERIC
-        select INPUT
         help
           Say Y or M here to include Realtek HD-audio codec support in
           snd-hda-intel driver, such as ALC880.
diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 93d2ce891db6..552646c049fa 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -3810,6 +3810,7 @@ static void alc280_fixup_hp_gpio4(struct hda_codec *codec,
         }
 }
 
+#if IS_REACHABLE(INPUT)
 static void gpio2_mic_hotkey_event(struct hda_codec *codec,
                                    struct hda_jack_callback *event)
 {
@@ -3942,6 +3943,10 @@ static void alc233_fixup_lenovo_line2_mic_hotkey(struct hda_codec *codec,
                 spec->kb_dev = NULL;
         }
 }
+#else /* INPUT */
+#define alc280_fixup_hp_gpio2_mic_hotkey        NULL
+#define alc233_fixup_lenovo_line2_mic_hotkey    NULL
+#endif /* INPUT */
 
 static void alc269_fixup_hp_line1_mic1_led(struct hda_codec *codec,
                                 const struct hda_fixup *fix, int action)