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