Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
13struct backlight_device;
14struct tinydrm_device;
15struct drm_clip_rect;
16struct spi_transfer;
17struct spi_message;
18struct spi_device;
19struct device;
20
21/**
22 * tinydrm_machine_little_endian - Machine is little endian
23 *
24 * Returns:
25 * true if *defined(__LITTLE_ENDIAN)*, false otherwise
26 */
27static 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
36bool 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);
39void tinydrm_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
40 struct drm_clip_rect *clip);
41void tinydrm_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb,
42 struct drm_clip_rect *clip);
43void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
44 struct drm_framebuffer *fb,
45 struct drm_clip_rect *clip, bool swap);
46
47struct backlight_device *tinydrm_of_find_backlight(struct device *dev);
48int tinydrm_enable_backlight(struct backlight_device *backlight);
49int tinydrm_disable_backlight(struct backlight_device *backlight);
50
51size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len);
52bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw);
53int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz,
54 struct spi_transfer *header, u8 bpw, const void *buf,
55 size_t len);
56void _tinydrm_dbg_spi_message(struct spi_device *spi, struct spi_message *m);
57
58#ifdef DEBUG
59/**
60 * tinydrm_dbg_spi_message - Dump SPI message
61 * @spi: SPI device
62 * @m: SPI message
63 *
64 * Dumps info about the transfers in a SPI message including buffer content.
65 * DEBUG has to be defined for this function to be enabled alongside setting
66 * the DRM_UT_DRIVER bit of &drm_debug.
67 */
68static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
69 struct spi_message *m)
70{
71 if (drm_debug & DRM_UT_DRIVER)
72 _tinydrm_dbg_spi_message(spi, m);
73}
74#else
75static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
76 struct spi_message *m)
77{
78}
79#endif /* DEBUG */
80
81#endif /* __LINUX_TINYDRM_HELPERS_H */