From a60df14d8197b09319d6d23a5dcba75b679d13e4 Mon Sep 17 00:00:00 2001
From: GavinDarkglider <31815002+GavinDarkglider@users.noreply.github.com>
Date: Wed, 17 Nov 2021 21:03:03 +0100
Subject: [PATCH] Lakka/Nintendo Switch: disable cpu scaling for Nintendo
 Switch

Lakka on Nintendo Switch uses own cpu governor.

Upstream of patch used by Lakka at build time
https://github.com/libretro/Lakka-LibreELEC/blob/1943ad296eaf7c01040f02aa8f5dff3d2f37309f/packages/libretro/retroarch/patches/retroarch-04-cpufreq-wip-disable-on-switch.patch
---
 driver.c                 | 4 ++++
 menu/cbs/menu_cbs_left.c | 2 ++
 menu/menu_driver.c       | 4 ++++
 retroarch.c              | 4 ++++
 4 files changed, 14 insertions(+)

diff --git a/driver.c b/driver.c
index 8d9dddcf54..cc498e390f 100644
--- a/driver.c
+++ b/driver.c
@@ -668,9 +668,11 @@ void drivers_init(
    if (flags & DRIVER_MIDI_MASK)
       midi_driver_init(settings);
 
+#ifndef HAVE_LAKKA_SWITCH
 #ifdef HAVE_LAKKA
    cpu_scaling_driver_init();
 #endif
+#endif /* #ifndef HAVE_LAKKA_SWITCH */
 }
 
 void driver_uninit(int flags)
@@ -755,9 +757,11 @@ void driver_uninit(int flags)
    if (flags & DRIVER_MIDI_MASK)
       midi_driver_free();
 
+#ifndef HAVE_LAKKA_SWITCH
 #ifdef HAVE_LAKKA
    cpu_scaling_driver_free();
 #endif
+#endif /* #ifndef HAVE_LAKKA_SWITCH */
 }
 
 void retroarch_deinit_drivers(struct retro_callbacks *cbs)
diff --git a/menu/cbs/menu_cbs_left.c b/menu/cbs/menu_cbs_left.c
index 08a92fdce1..3d9ed590da 100644
--- a/menu/cbs/menu_cbs_left.c
+++ b/menu/cbs/menu_cbs_left.c
@@ -678,6 +678,7 @@ static int manual_content_scan_core_name_left(unsigned type, const char *label,
    return 0;
 }
 
+#ifndef HAVE_LAKKA_SWITCH
 #ifdef HAVE_LAKKA
 static int cpu_policy_mode_change(unsigned type, const char *label,
       bool wraparound)
@@ -792,6 +793,7 @@ static int cpu_policy_freq_tweak(unsigned type, const char *label,
    return 0;
 }
 #endif
+#endif /* #ifndef HAVE_LAKKA_SWITCH */
 
 static int core_setting_left(unsigned type, const char *label,
       bool wraparound)
diff --git a/menu/menu_driver.c b/menu/menu_driver.c
index 87166738e6..ce94d3b8cc 100644
--- a/menu/menu_driver.c
+++ b/menu/menu_driver.c
@@ -6704,9 +6704,11 @@ void menu_driver_toggle(
 
    if (on) 
    {
+#ifndef HAVE_LAKKA_SWITCH
 #ifdef HAVE_LAKKA
       set_cpu_scaling_signal(CPUSCALING_EVENT_FOCUS_MENU);
 #endif
+#endif /* #ifndef HAVE_LAKKA_SWITCH */
 #ifdef HAVE_OVERLAY
       /* If an overlay was displayed before the toggle
        * and overlays are disabled in menu, need to
@@ -6725,9 +6727,11 @@ void menu_driver_toggle(
    }
    else
    {
+#ifndef HAVE_LAKKA_SWITCH
 #ifdef HAVE_LAKKA
       set_cpu_scaling_signal(CPUSCALING_EVENT_FOCUS_CORE);
 #endif
+#endif /* #ifndef HAVE_LAKKA_SWITCH */
 #ifdef HAVE_OVERLAY
       /* Inhibits pointer 'select' and 'cancel' actions
        * (until the next time 'select'/'cancel' are released) */
diff --git a/retroarch.c b/retroarch.c
index 6773ccf923..3bd493ec05 100644
--- a/retroarch.c
+++ b/retroarch.c
@@ -3626,15 +3626,19 @@ static void runloop_pause_checks(void)
       command_event(CMD_EVENT_DISCORD_UPDATE, &userdata);
 #endif
 
+#ifndef HAVE_LAKKA_SWITCH
 #ifdef HAVE_LAKKA
       set_cpu_scaling_signal(CPUSCALING_EVENT_FOCUS_MENU);
 #endif
+#endif /* #ifndef HAVE_LAKKA_SWITCH */
    }
    else
    {
+#ifndef HAVE_LAKKA_SWITCH
 #ifdef HAVE_LAKKA
       set_cpu_scaling_signal(CPUSCALING_EVENT_FOCUS_CORE);
 #endif
+#endif /* #ifndef HAVE_LAKKA_SWITCH */
    }
 
 #if defined(HAVE_TRANSLATE) && defined(HAVE_GFX_WIDGETS)