From 0cf437e3759262db77d9d86acafe66b7990a6eb0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Kelemen=20=28vudiq=29?= <vudiq@vudiq.sk>
Date: Wed, 17 Nov 2021 21:59:37 +0100
Subject: [PATCH] Lakka/Nintendo Switch: disable rumble gain

Rumble gain breaks controlls on Nintendo Switch port of Lakka, probably
due to issue in the driver).

Upstream of patch used by Lakka at build time
https://github.com/libretro/Lakka-LibreELEC/blob/1943ad296eaf7c01040f02aa8f5dff3d2f37309f/packages/libretro/retroarch/patches/retroarch-06-switch_disable_rumble_gain.patch
---
 input/drivers_joypad/udev_joypad.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/input/drivers_joypad/udev_joypad.c b/input/drivers_joypad/udev_joypad.c
index 833b0861ea..0743de226e 100644
--- a/input/drivers_joypad/udev_joypad.c
+++ b/input/drivers_joypad/udev_joypad.c
@@ -151,6 +151,7 @@ error:
    return -1;
 }
 
+#ifndef HAVE_LAKKA_SWITCH
 static bool udev_set_rumble_gain(unsigned i, unsigned gain)
 {
    struct input_event ie;
@@ -179,6 +180,7 @@ static bool udev_set_rumble_gain(unsigned i, unsigned gain)
 
    return true;
 }
+#endif
 
 static int udev_add_pad(struct udev_device *dev, unsigned p, int fd, const char *path)
 {
@@ -299,6 +301,7 @@ static int udev_add_pad(struct udev_device *dev, unsigned p, int fd, const char
                p, path, pad->num_effects);
    }
 
+#ifndef HAVE_LAKKA_SWITCH
    /* Set rumble gain here, if supported */
    if (test_bit(FF_RUMBLE, ffbit))
    {
@@ -307,6 +310,7 @@ static int udev_add_pad(struct udev_device *dev, unsigned p, int fd, const char
                                       : DEFAULT_RUMBLE_GAIN;
       udev_set_rumble_gain(p, rumble_gain);
    }
+#endif
 
    return ret;
 }
@@ -790,7 +794,11 @@ input_device_driver_t udev_joypad = {
    udev_joypad_axis,
    udev_joypad_poll,
    udev_set_rumble,
+#ifndef HAVE_LAKKA_SWITCH
    udev_set_rumble_gain,
+#else
+   NULL,
+#endif
    udev_joypad_name,
    "udev",
 };