include/drm/display/drm_scdc_helper.h

Source file repositories/reference/linux-study-clean/include/drm/display/drm_scdc_helper.h

File Facts

System
Linux kernel
Corpus path
include/drm/display/drm_scdc_helper.h
Extension
.h
Size
2791 bytes
Lines
81
Domain
Repository Root And Misc
Bucket
include
Inferred role
Repository Root And Misc: implementation source
Status
source implementation candidate

Why This File Exists

Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.

Dependency Surface

Detected Declarations

Annotated Snippet

#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

Annotation

Implementation Notes