| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 | */ |
| 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 | */ |
| 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 |
| 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 */ |