diff options
author | Noralf Trønnes <noralf@tronnes.org> | 2017-01-22 02:19:51 +0300 |
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committer | Noralf Trønnes <noralf@tronnes.org> | 2017-02-18 20:04:59 +0300 |
commit | 9f69eb5c36a644571cca6b2f8dc5f6a7cba04a8b (patch) | |
tree | 082f595ac349d49ff8a0c2bae39e61608d040f72 /include | |
parent | fa201ac2c61f51d9abdaffdf994d5780dcb51703 (diff) | |
download | linux-9f69eb5c36a644571cca6b2f8dc5f6a7cba04a8b.tar.xz |
drm/tinydrm: Add helper functions
Add common functionality needed by many tinydrm drivers.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/drm/tinydrm/tinydrm-helpers.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/include/drm/tinydrm/tinydrm-helpers.h b/include/drm/tinydrm/tinydrm-helpers.h new file mode 100644 index 000000000000..78175fe6ab22 --- /dev/null +++ b/include/drm/tinydrm/tinydrm-helpers.h @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2016 Noralf Trønnes + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __LINUX_TINYDRM_HELPERS_H +#define __LINUX_TINYDRM_HELPERS_H + +struct backlight_device; +struct tinydrm_device; +struct drm_clip_rect; +struct spi_transfer; +struct spi_message; +struct spi_device; +struct device; + +/** + * tinydrm_machine_little_endian - Machine is little endian + * + * Returns: + * true if *defined(__LITTLE_ENDIAN)*, false otherwise + */ +static inline bool tinydrm_machine_little_endian(void) +{ +#if defined(__LITTLE_ENDIAN) + return true; +#else + return false; +#endif +} + +bool tinydrm_merge_clips(struct drm_clip_rect *dst, + struct drm_clip_rect *src, unsigned int num_clips, + unsigned int flags, u32 max_width, u32 max_height); +void tinydrm_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb, + struct drm_clip_rect *clip); +void tinydrm_swab16(u16 *dst, void *vaddr, struct drm_framebuffer *fb, + struct drm_clip_rect *clip); +void tinydrm_xrgb8888_to_rgb565(u16 *dst, void *vaddr, + struct drm_framebuffer *fb, + struct drm_clip_rect *clip, bool swap); + +#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE +struct backlight_device *tinydrm_of_find_backlight(struct device *dev); +int tinydrm_enable_backlight(struct backlight_device *backlight); +int tinydrm_disable_backlight(struct backlight_device *backlight); +#else +static inline struct backlight_device * +tinydrm_of_find_backlight(struct device *dev) +{ + return NULL; +} + +static inline int tinydrm_enable_backlight(struct backlight_device *backlight) +{ + return 0; +} + +static inline int +tinydrm_disable_backlight(struct backlight_device *backlight) +{ + return 0; +} +#endif + +size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len); +bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw); +int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz, + struct spi_transfer *header, u8 bpw, const void *buf, + size_t len); +void _tinydrm_dbg_spi_message(struct spi_device *spi, struct spi_message *m); + +#ifdef DEBUG +/** + * tinydrm_dbg_spi_message - Dump SPI message + * @spi: SPI device + * @m: SPI message + * + * Dumps info about the transfers in a SPI message including buffer content. + * DEBUG has to be defined for this function to be enabled alongside setting + * the DRM_UT_DRIVER bit of &drm_debug. + */ +static inline void tinydrm_dbg_spi_message(struct spi_device *spi, + struct spi_message *m) +{ + if (drm_debug & DRM_UT_DRIVER) + _tinydrm_dbg_spi_message(spi, m); +} +#else +static inline void tinydrm_dbg_spi_message(struct spi_device *spi, + struct spi_message *m) +{ +} +#endif /* DEBUG */ + +#endif /* __LINUX_TINYDRM_HELPERS_H */ |