forked from Minki/linux
644edf52b6
SCDC is the Status and Control Data Channel for HDMI. Move the SCDC helpers into display/ and split the header into files for core and helpers. Update all affected drivers. No functional changes. To avoid the proliferation of Kconfig options, SCDC is part of DRM's support for HDMI. If necessary, a new option could make SCDC an independent feature. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20220421073108.19226-9-tzimmermann@suse.de
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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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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