/*
* 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
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(vorverarbeitet am 2026-09-28)
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