2 * Copyright (C) 2016 Noralf Trønnes
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.
10 #ifndef __LINUX_TINYDRM_HELPERS_H
11 #define __LINUX_TINYDRM_HELPERS_H
13 struct backlight_device;
14 struct drm_framebuffer;
22 * tinydrm_machine_little_endian - Machine is little endian
25 * true if *defined(__LITTLE_ENDIAN)*, false otherwise
27 static inline bool tinydrm_machine_little_endian(void)
29 #if defined(__LITTLE_ENDIAN)
36 void tinydrm_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
37 struct drm_rect *clip);
38 void tinydrm_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb,
39 struct drm_rect *clip);
40 void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
41 struct drm_framebuffer *fb,
42 struct drm_rect *clip, bool swap);
43 void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
44 struct drm_rect *clip);
46 size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len);
47 bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw);
48 int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz,
49 struct spi_transfer *header, u8 bpw, const void *buf,
51 void _tinydrm_dbg_spi_message(struct spi_device *spi, struct spi_message *m);
55 * tinydrm_dbg_spi_message - Dump SPI message
59 * Dumps info about the transfers in a SPI message including buffer content.
60 * DEBUG has to be defined for this function to be enabled alongside setting
61 * the DRM_UT_DRIVER bit of &drm_debug.
63 static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
64 struct spi_message *m)
66 if (drm_debug & DRM_UT_DRIVER)
67 _tinydrm_dbg_spi_message(spi, m);
70 static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
71 struct spi_message *m)
76 #endif /* __LINUX_TINYDRM_HELPERS_H */