ALSA: hda - Add keycode map for alc input device

Then users can remap the keycode from userspace. If without the remap,
the input device will pass KEY_MICMUTE to userspace, but in X11 layer,
it uses KEY_F20 rather than KEY_MICMUTE for XF86AudioMicMute. After
adding the keycode map, users can remap the keycode to any value users
want.

Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 257b839ea94dec8f7822d80fda7020ce29e0ad94..3a89d82f805759f5c4016c47df40d1a3b5522f49 100644 (file)
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -67,6 +67,10 @@ enum {
        ALC_HEADSET_TYPE_OMTP,
 };
 
+enum {
+       ALC_KEY_MICMUTE_INDEX,
+};
+
 struct alc_customize_define {
        unsigned int  sku_cfg;
        unsigned char port_connectivity;
@@ -123,6 +127,7 @@ struct alc_spec {
        unsigned int pll_coef_idx, pll_coef_bit;
        unsigned int coef0;
        struct input_dev *kb_dev;
+       u8 alc_mute_keycode_map[1];
 };
 
 /*
@@ -3462,24 +3467,32 @@ static void gpio2_mic_hotkey_event(struct hda_codec *codec,
 
        /* GPIO2 just toggles on a keypress/keyrelease cycle. Therefore
           send both key on and key off event for every interrupt. */
-       input_report_key(spec->kb_dev, KEY_MICMUTE, 1);
+       input_report_key(spec->kb_dev, spec->alc_mute_keycode_map[ALC_KEY_MICMUTE_INDEX], 1);
        input_sync(spec->kb_dev);
-       input_report_key(spec->kb_dev, KEY_MICMUTE, 0);
+       input_report_key(spec->kb_dev, spec->alc_mute_keycode_map[ALC_KEY_MICMUTE_INDEX], 0);
        input_sync(spec->kb_dev);
 }
 
 static int alc_register_micmute_input_device(struct hda_codec *codec)
 {
        struct alc_spec *spec = codec->spec;
+       int i;
 
        spec->kb_dev = input_allocate_device();
        if (!spec->kb_dev) {
                codec_err(codec, "Out of memory (input_allocate_device)\n");
                return -ENOMEM;
        }
+
+       spec->alc_mute_keycode_map[ALC_KEY_MICMUTE_INDEX] = KEY_MICMUTE;
+
        spec->kb_dev->name = "Microphone Mute Button";
        spec->kb_dev->evbit[0] = BIT_MASK(EV_KEY);
-       spec->kb_dev->keybit[BIT_WORD(KEY_MICMUTE)] = BIT_MASK(KEY_MICMUTE);
+       spec->kb_dev->keycodesize = sizeof(spec->alc_mute_keycode_map[0]);
+       spec->kb_dev->keycodemax = ARRAY_SIZE(spec->alc_mute_keycode_map);
+       spec->kb_dev->keycode = spec->alc_mute_keycode_map;
+       for (i = 0; i < ARRAY_SIZE(spec->alc_mute_keycode_map); i++)
+               set_bit(spec->alc_mute_keycode_map[i], spec->kb_dev->keybit);
 
        if (input_register_device(spec->kb_dev)) {
                codec_err(codec, "input_register_device failed\n");