1 /* 2 * Copyright (C) 2016 Noralf Trønnes 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 */ 9 10 #ifndef __LINUX_TINYDRM_HELPERS_H 11 #define __LINUX_TINYDRM_HELPERS_H 12 13 struct backlight_device; 14 struct tinydrm_device; 15 struct drm_clip_rect; 16 struct spi_transfer; 17 struct spi_message; 18 struct spi_device; 19 struct device; 20 21 /** 22 * tinydrm_machine_little_endian - Machine is little endian 23 * 24 * Returns: 25 * true if *defined(__LITTLE_ENDIAN)*, false otherwise 26 */ tinydrm_machine_little_endian(void)27 static inline bool tinydrm_machine_little_endian(void) 28 { 29 #if defined(__LITTLE_ENDIAN) 30 return true; 31 #else 32 return false; 33 #endif 34 } 35 36 bool tinydrm_merge_clips(struct drm_clip_rect *dst, 37 struct drm_clip_rect *src, unsigned int num_clips, 38 unsigned int flags, u32 max_width, u32 max_height); 39 void tinydrm_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb, 40 struct drm_clip_rect *clip); 41 void tinydrm_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb, 42 struct drm_clip_rect *clip); 43 void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr, 44 struct drm_framebuffer *fb, 45 struct drm_clip_rect *clip, bool swap); 46 void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb, 47 struct drm_clip_rect *clip); 48 49 struct backlight_device *tinydrm_of_find_backlight(struct device *dev); 50 int tinydrm_enable_backlight(struct backlight_device *backlight); 51 int tinydrm_disable_backlight(struct backlight_device *backlight); 52 53 size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len); 54 bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw); 55 int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz, 56 struct spi_transfer *header, u8 bpw, const void *buf, 57 size_t len); 58 void _tinydrm_dbg_spi_message(struct spi_device *spi, struct spi_message *m); 59 60 #ifdef DEBUG 61 /** 62 * tinydrm_dbg_spi_message - Dump SPI message 63 * @spi: SPI device 64 * @m: SPI message 65 * 66 * Dumps info about the transfers in a SPI message including buffer content. 67 * DEBUG has to be defined for this function to be enabled alongside setting 68 * the DRM_UT_DRIVER bit of &drm_debug. 69 */ tinydrm_dbg_spi_message(struct spi_device * spi,struct spi_message * m)70 static inline void tinydrm_dbg_spi_message(struct spi_device *spi, 71 struct spi_message *m) 72 { 73 if (drm_debug & DRM_UT_DRIVER) 74 _tinydrm_dbg_spi_message(spi, m); 75 } 76 #else tinydrm_dbg_spi_message(struct spi_device * spi,struct spi_message * m)77 static inline void tinydrm_dbg_spi_message(struct spi_device *spi, 78 struct spi_message *m) 79 { 80 } 81 #endif /* DEBUG */ 82 83 #endif /* __LINUX_TINYDRM_HELPERS_H */ 84