1 files changed, 23 insertions, 3 deletions
diff --git a/src/input_common/drivers/sdl_driver.cpp b/src/input_common/drivers/sdl_driver.cpp
index c3e9a066b3..a308554071 100644
--- a/src/input_common/drivers/sdl_driver.cpp
+++ b/src/input_common/drivers/sdl_driver.cpp
@@ -3,6 +3,7 @@
 // SPDX-FileCopyrightText: 2018 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <algorithm>
 #include <array>
 #include <numbers>
 #include "common/logging.h"
@@ -115,7 +116,15 @@ public:
             }
         }
 
-        LOG_INFO(Input, "Controller motion capabilities: accel={} gyro={}", has_accel, has_gyro);
+        // EnableMotion is also called to recover a stalled sensor, so only log when the reported
+        // capabilities actually change instead of on every restart.
+        if (!motion_capabilities_logged || logged_accel != has_accel || logged_gyro != has_gyro) {
+            LOG_INFO(Input, "Controller motion capabilities: accel={} gyro={}", has_accel,
+                     has_gyro);
+            motion_capabilities_logged = true;
+            logged_accel = has_accel;
+            logged_gyro = has_gyro;
+        }
     }
 
     bool HasMotion() const {
@@ -163,16 +172,21 @@ public:
         // Motion data is invalid
         if (motion.accel_x == 0 && motion.gyro_x == 0 && motion.accel_y == 0 &&
             motion.gyro_y == 0 && motion.accel_z == 0 && motion.gyro_z == 0) {
-            if (motion_error_count++ < 200) {
+            if (motion_error_count++ < motion_restart_threshold) {
                 return false;
             }
-            // Try restarting the sensor
+            // Try restarting the sensor. Back off exponentially so a sensor that keeps reporting
+            // zeros (observed on the Steam Deck) isn't toggled several times a
+            // second for the whole session.
             motion_error_count = 0;
+            motion_restart_threshold =
+                std::min(motion_restart_threshold * 2, MaxMotionRestartThreshold);
             EnableMotion();
             return false;
         }
 
         motion_error_count = 0;
+        motion_restart_threshold = InitialMotionRestartThreshold;
         motion.delta_timestamp = time_difference;
         return true;
     }
@@ -393,7 +407,13 @@ private:
     mutable std::mutex mutex;
 
     u64 last_motion_update{};
+    static constexpr std::size_t InitialMotionRestartThreshold = 200;
+    static constexpr std::size_t MaxMotionRestartThreshold = 200 * 64;
     std::size_t motion_error_count{};
+    std::size_t motion_restart_threshold{InitialMotionRestartThreshold};
+    bool motion_capabilities_logged{false};
+    bool logged_accel{false};
+    bool logged_gyro{false};
     bool has_gyro{false};
     bool has_accel{false};
     bool has_vibration{false};