2 * Copyright (c) 2015 NVIDIA Corporation. All rights reserved.
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5 * copy of this software and associated documentation files (the "Software"),
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11 * The above copyright notice and this permission notice (including the
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24 #ifndef DRM_SCDC_HELPER_H
25 #define DRM_SCDC_HELPER_H
27 #include <linux/types.h>
29 #include <drm/display/drm_scdc.h>
34 ssize_t drm_scdc_read(struct i2c_adapter *adapter, u8 offset, void *buffer,
36 ssize_t drm_scdc_write(struct i2c_adapter *adapter, u8 offset,
37 const void *buffer, size_t size);
40 * drm_scdc_readb - read a single byte from SCDC
41 * @adapter: I2C adapter
42 * @offset: offset of register to read
43 * @value: return location for the register value
45 * Reads a single byte from SCDC. This is a convenience wrapper around the
46 * drm_scdc_read() function.
49 * 0 on success or a negative error code on failure.
51 static inline int drm_scdc_readb(struct i2c_adapter *adapter, u8 offset,
54 return drm_scdc_read(adapter, offset, value, sizeof(*value));
58 * drm_scdc_writeb - write a single byte to SCDC
59 * @adapter: I2C adapter
60 * @offset: offset of register to read
61 * @value: return location for the register value
63 * Writes a single byte to SCDC. This is a convenience wrapper around the
64 * drm_scdc_write() function.
67 * 0 on success or a negative error code on failure.
69 static inline int drm_scdc_writeb(struct i2c_adapter *adapter, u8 offset,
72 return drm_scdc_write(adapter, offset, &value, sizeof(value));
75 bool drm_scdc_get_scrambling_status(struct drm_connector *connector);
77 bool drm_scdc_set_scrambling(struct drm_connector *connector, bool enable);
78 bool drm_scdc_set_high_tmds_clock_ratio(struct drm_connector *connector, bool set);