575.51.02

kernel-open/nvidia/nv-backlight.c

@@ -0,0 +1,81 @@
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2020 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#define  __NO_VERSION__
+
+#include <linux/backlight.h>
+
+#include "os-interface.h"
+#include "nv-linux.h"
+
+NV_STATUS NV_API_CALL nv_get_tegra_brightness_level
+(
+    nv_state_t *nv,
+    NvU32 *brightness
+)
+{
+#ifdef NV_GET_BACKLIGHT_DEVICE_BY_NAME_PRESENT
+    nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
+    struct backlight_device *bd;
+
+    bd = get_backlight_device_by_name(nvl->backlight.device_name);
+    if (bd == NULL)
+    {
+        nv_printf(NV_DBG_ERRORS, "Unable to get backlight device\n");
+        return NV_ERR_GENERIC;
+    }
+
+    *brightness = bd->props.brightness;
+
+    return NV_OK;
+#else
+    return NV_ERR_NOT_SUPPORTED;
+#endif
+}
+
+NV_STATUS NV_API_CALL nv_set_tegra_brightness_level
+(
+    nv_state_t *nv,
+    NvU32 brightness
+)
+{
+#ifdef NV_GET_BACKLIGHT_DEVICE_BY_NAME_PRESENT
+    nv_linux_state_t *nvl = NV_GET_NVL_FROM_NV_STATE(nv);
+    struct backlight_device *bd;
+
+    bd = get_backlight_device_by_name(nvl->backlight.device_name);
+    if (bd == NULL)
+    {
+        nv_printf(NV_DBG_ERRORS, "Unable to get backlight device\n");
+        return NV_ERR_GENERIC;
+    }
+
+    bd->props.brightness = brightness;
+
+    backlight_update_status(bd);
+
+    return NV_OK;
+#else
+    return NV_ERR_NOT_SUPPORTED;
+#endif
+}