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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
9f69eb5c NT |
2 | /* |
3 | * Copyright (C) 2016 Noralf Trønnes | |
9f69eb5c NT |
4 | */ |
5 | ||
6 | #ifndef __LINUX_TINYDRM_HELPERS_H | |
7 | #define __LINUX_TINYDRM_HELPERS_H | |
8 | ||
9 | struct backlight_device; | |
96f2a9ae NT |
10 | struct drm_device; |
11 | struct drm_display_mode; | |
af741381 | 12 | struct drm_framebuffer; |
b051b345 | 13 | struct drm_rect; |
96f2a9ae NT |
14 | struct drm_simple_display_pipe; |
15 | struct drm_simple_display_pipe_funcs; | |
9f69eb5c NT |
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 | */ | |
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 | ||
96f2a9ae NT |
36 | int tinydrm_display_pipe_init(struct drm_device *drm, |
37 | struct drm_simple_display_pipe *pipe, | |
38 | const struct drm_simple_display_pipe_funcs *funcs, | |
39 | int connector_type, | |
40 | const uint32_t *formats, | |
41 | unsigned int format_count, | |
42 | const struct drm_display_mode *mode, | |
43 | unsigned int rotation); | |
44 | ||
9f69eb5c NT |
45 | size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len); |
46 | bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw); | |
47 | int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz, | |
48 | struct spi_transfer *header, u8 bpw, const void *buf, | |
49 | size_t len); | |
50 | void _tinydrm_dbg_spi_message(struct spi_device *spi, struct spi_message *m); | |
51 | ||
52 | #ifdef DEBUG | |
53 | /** | |
54 | * tinydrm_dbg_spi_message - Dump SPI message | |
55 | * @spi: SPI device | |
56 | * @m: SPI message | |
57 | * | |
58 | * Dumps info about the transfers in a SPI message including buffer content. | |
59 | * DEBUG has to be defined for this function to be enabled alongside setting | |
60 | * the DRM_UT_DRIVER bit of &drm_debug. | |
61 | */ | |
62 | static inline void tinydrm_dbg_spi_message(struct spi_device *spi, | |
63 | struct spi_message *m) | |
64 | { | |
65 | if (drm_debug & DRM_UT_DRIVER) | |
66 | _tinydrm_dbg_spi_message(spi, m); | |
67 | } | |
68 | #else | |
69 | static inline void tinydrm_dbg_spi_message(struct spi_device *spi, | |
70 | struct spi_message *m) | |
71 | { | |
72 | } | |
73 | #endif /* DEBUG */ | |
74 | ||
75 | #endif /* __LINUX_TINYDRM_HELPERS_H */ |