83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/*
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* Copyright (C) 2016 Noralf Trønnes
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __LINUX_TINYDRM_HELPERS_H
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#define __LINUX_TINYDRM_HELPERS_H
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struct backlight_device;
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struct tinydrm_device;
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struct drm_clip_rect;
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struct spi_transfer;
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struct spi_message;
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struct spi_device;
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struct device;
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/**
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* tinydrm_machine_little_endian - Machine is little endian
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*
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* Returns:
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* true if *defined(__LITTLE_ENDIAN)*, false otherwise
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*/
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static inline bool tinydrm_machine_little_endian(void)
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{
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#if defined(__LITTLE_ENDIAN)
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return true;
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#else
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return false;
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#endif
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}
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bool tinydrm_merge_clips(struct drm_clip_rect *dst,
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struct drm_clip_rect *src, unsigned int num_clips,
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unsigned int flags, u32 max_width, u32 max_height);
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void tinydrm_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
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struct drm_clip_rect *clip);
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void tinydrm_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb,
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struct drm_clip_rect *clip);
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void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
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struct drm_framebuffer *fb,
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struct drm_clip_rect *clip, bool swap);
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int tinydrm_xrgb8888_to_gray8(u8 *dst, struct drm_framebuffer *fb);
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struct backlight_device *tinydrm_of_find_backlight(struct device *dev);
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int tinydrm_enable_backlight(struct backlight_device *backlight);
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int tinydrm_disable_backlight(struct backlight_device *backlight);
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size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len);
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bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw);
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int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz,
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struct spi_transfer *header, u8 bpw, const void *buf,
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size_t len);
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void _tinydrm_dbg_spi_message(struct spi_device *spi, struct spi_message *m);
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#ifdef DEBUG
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/**
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* tinydrm_dbg_spi_message - Dump SPI message
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* @spi: SPI device
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* @m: SPI message
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*
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* Dumps info about the transfers in a SPI message including buffer content.
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* DEBUG has to be defined for this function to be enabled alongside setting
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* the DRM_UT_DRIVER bit of &drm_debug.
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*/
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static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
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struct spi_message *m)
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{
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if (drm_debug & DRM_UT_DRIVER)
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_tinydrm_dbg_spi_message(spi, m);
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}
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#else
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static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
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struct spi_message *m)
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{
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}
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#endif /* DEBUG */
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#endif /* __LINUX_TINYDRM_HELPERS_H */
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