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편집 파일: drm_scdc_helper.h

/* * Copyright (c) 2015 NVIDIA Corporation. All rights reserved. * * 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, sub license, * 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 (including the * next paragraph) 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 NON-INFRINGEMENT. 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. */ #ifndef DRM_SCDC_HELPER_H #define DRM_SCDC_HELPER_H #include <linux/types.h> #include <drm/display/drm_scdc.h> struct drm_connector; struct i2c_adapter; ssize_t drm_scdc_read(struct i2c_adapter *adapter, u8 offset, void *buffer, size_t size); ssize_t drm_scdc_write(struct i2c_adapter *adapter, u8 offset, const void *buffer, size_t size); /** * drm_scdc_readb - read a single byte from SCDC * @adapter: I2C adapter * @offset: offset of register to read * @value: return location for the register value * * Reads a single byte from SCDC. This is a convenience wrapper around the * drm_scdc_read() function. * * Returns: * 0 on success or a negative error code on failure. */ static inline int drm_scdc_readb(struct i2c_adapter *adapter, u8 offset, u8 *value) { return drm_scdc_read(adapter, offset, value, sizeof(*value)); } /** * drm_scdc_writeb - write a single byte to SCDC * @adapter: I2C adapter * @offset: offset of register to read * @value: return location for the register value * * Writes a single byte to SCDC. This is a convenience wrapper around the * drm_scdc_write() function. * * Returns: * 0 on success or a negative error code on failure. */ static inline int drm_scdc_writeb(struct i2c_adapter *adapter, u8 offset, u8 value) { return drm_scdc_write(adapter, offset, &value, sizeof(value)); } bool drm_scdc_get_scrambling_status(struct drm_connector *connector); bool drm_scdc_set_scrambling(struct drm_connector *connector, bool enable); bool drm_scdc_set_high_tmds_clock_ratio(struct drm_connector *connector, bool set); #endif