80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
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/*
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* Copyright (c) 2015 NVIDIA Corporation. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef DRM_SCDC_HELPER_H
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#define DRM_SCDC_HELPER_H
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#include <linux/types.h>
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#include <drm/display/drm_scdc.h>
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struct i2c_adapter;
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ssize_t drm_scdc_read(struct i2c_adapter *adapter, u8 offset, void *buffer,
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size_t size);
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ssize_t drm_scdc_write(struct i2c_adapter *adapter, u8 offset,
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const void *buffer, size_t size);
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/**
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* drm_scdc_readb - read a single byte from SCDC
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* @adapter: I2C adapter
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* @offset: offset of register to read
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* @value: return location for the register value
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*
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* Reads a single byte from SCDC. This is a convenience wrapper around the
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* drm_scdc_read() function.
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*
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* Returns:
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* 0 on success or a negative error code on failure.
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*/
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static inline int drm_scdc_readb(struct i2c_adapter *adapter, u8 offset,
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u8 *value)
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{
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return drm_scdc_read(adapter, offset, value, sizeof(*value));
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}
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/**
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* drm_scdc_writeb - write a single byte to SCDC
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* @adapter: I2C adapter
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* @offset: offset of register to read
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* @value: return location for the register value
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*
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* Writes a single byte to SCDC. This is a convenience wrapper around the
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* drm_scdc_write() function.
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*
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* Returns:
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* 0 on success or a negative error code on failure.
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*/
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static inline int drm_scdc_writeb(struct i2c_adapter *adapter, u8 offset,
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u8 value)
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{
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return drm_scdc_write(adapter, offset, &value, sizeof(value));
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}
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bool drm_scdc_get_scrambling_status(struct i2c_adapter *adapter);
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bool drm_scdc_set_scrambling(struct i2c_adapter *adapter, bool enable);
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bool drm_scdc_set_high_tmds_clock_ratio(struct i2c_adapter *adapter, bool set);
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#endif
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