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 int tinydrm_fb_dirty(struct drm_framebuffer *fb,
40 struct drm_file *file_priv,
41 unsigned int flags, unsigned int color,
42 struct drm_clip_rect *clips,
43 unsigned int num_clips);
44 void tinydrm_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
45 struct drm_clip_rect *clip);
46 void tinydrm_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb,
47 struct drm_clip_rect *clip);
48 void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr,
49 struct drm_framebuffer *fb,
50 struct drm_clip_rect *clip, bool swap);
51 void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
52 struct drm_clip_rect *clip);
53
54 size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len);
55 bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw);
56 int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz,
57 struct spi_transfer *header, u8 bpw, const void *buf,
58 size_t len);
59 void _tinydrm_dbg_spi_message(struct spi_device *spi, struct spi_message *m);
60
61 #ifdef DEBUG
62 /**
63 * tinydrm_dbg_spi_message - Dump SPI message
64 * @spi: SPI device
65 * @m: SPI message
66 *
67 * Dumps info about the transfers in a SPI message including buffer content.
68 * DEBUG has to be defined for this function to be enabled alongside setting
69 * the DRM_UT_DRIVER bit of &drm_debug.
70 */
tinydrm_dbg_spi_message(struct spi_device * spi,struct spi_message * m)71 static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
72 struct spi_message *m)
73 {
74 if (drm_debug & DRM_UT_DRIVER)
75 _tinydrm_dbg_spi_message(spi, m);
76 }
77 #else
tinydrm_dbg_spi_message(struct spi_device * spi,struct spi_message * m)78 static inline void tinydrm_dbg_spi_message(struct spi_device *spi,
79 struct spi_message *m)
80 {
81 }
82 #endif /* DEBUG */
83
84 #endif /* __LINUX_TINYDRM_HELPERS_H */
85
