/* SPDX-License-Identifier: MIT *//* * Copyright 2026 Advanced Micro Devices, Inc. * * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. */ #ifndef __AMDGPU_DM_BACKLIGHT_H__#define __AMDGPU_DM_BACKLIGHT_H__ struct amdgpu_display_manager;struct amdgpu_dm_connector;struct backlight_device;struct backlight_properties;struct dc_link;struct dc_stream_state;struct device;struct device_attribute;struct drm_connector;struct attribute_group; #define AMDGPU_DM_DEFAULT_MIN_BACKLIGHT 12#define AMDGPU_DM_DEFAULT_MAX_BACKLIGHT 255#define AMDGPU_DM_MIN_SPREAD ((AMDGPU_DM_DEFAULT_MAX_BACKLIGHT - AMDGPU_DM_DEFAULT_MIN_BACKLIGHT) / 2)#define AUX_BL_DEFAULT_TRANSITION_TIME_MS 50 void amdgpu_dm_update_backlight_caps(struct amdgpu_display_manager *dm,				     int bl_idx);void amdgpu_dm_backlight_set_level(struct amdgpu_display_manager *dm,				   int bl_idx, u32 user_brightness);void amdgpu_dm_register_backlight_device(struct amdgpu_dm_connector *aconnector);void amdgpu_dm_setup_backlight_device(struct amdgpu_display_manager *dm,			    struct amdgpu_dm_connector *aconnector);void amdgpu_dm_update_connector_ext_caps(struct amdgpu_dm_connector *aconnector);bool amdgpu_dm_should_create_sysfs(struct amdgpu_dm_connector *aconnector); extern const struct attribute_group amdgpu_group; #if IS_ENABLED(CONFIG_DRM_AMD_DC_KUNIT_TEST)struct dc_stream_state *dm_find_stream_with_link(struct amdgpu_display_manager *dm,						 struct dc_link *link);int amdgpu_dm_backlight_update_status(struct backlight_device *bd);u32 amdgpu_dm_backlight_get_level(struct amdgpu_display_manager *dm, int bl_idx);int amdgpu_dm_backlight_get_brightness(struct backlight_device *bd);ssize_t panel_power_savings_show(struct device *device,				 struct device_attribute *attr,				 char *buf);ssize_t panel_power_savings_store(struct device *device,				 struct device_attribute *attr,				 const char *buf, size_t count);int get_brightness_range(const struct amdgpu_dm_backlight_caps *caps,			 unsigned int *min, unsigned int *max);void convert_custom_brightness(const struct amdgpu_dm_backlight_caps *caps,			       unsigned int min, unsigned int max,			       uint32_t *user_brightness);u32 convert_brightness_from_user(const struct amdgpu_dm_backlight_caps *caps,				 uint32_t brightness);u32 convert_brightness_to_user(const struct amdgpu_dm_backlight_caps *caps,			       uint32_t brightness);int amdgpu_dm_backlight_get_device_index(struct amdgpu_display_manager *dm,					 struct backlight_device *bd);void amdgpu_dm_backlight_fill_props(const struct amdgpu_dm_backlight_caps *caps,				    bool is_system_supplied,				    bool custom_curve_enabled,				    struct backlight_properties *props);uint amdgpu_dm_get_dc_debug_mask(void);void amdgpu_dm_set_dc_debug_mask(uint val);int amdgpu_dm_get_abm_level_param(void);void amdgpu_dm_set_abm_level_param(int val);int amdgpu_dm_get_backlight_param(void);void amdgpu_dm_set_backlight_param(int val);#endif #endif /* __AMDGPU_DM_BACKLIGHT_H__ */