include/drm/tinydrm/tinydrm-helpers.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * Copyright (C) 2016 Noralf Trønnes
   4  */
   5
   6 #ifndef __LINUX_TINYDRM_HELPERS_H
   7 #define __LINUX_TINYDRM_HELPERS_H
   8
   9 struct backlight_device;
  10 struct drm_device;
  11 struct drm_display_mode;
  12 struct drm_framebuffer;
  13 struct drm_rect;
  14 struct drm_simple_display_pipe;
  15 struct drm_simple_display_pipe_funcs;
  16 struct spi_transfer;
  17 struct spi_device;
  18 struct device;
  19
  20 /**
  21  * tinydrm_machine_little_endian - Machine is little endian
  22  *
  23  * Returns:
  24  * true if *defined(__LITTLE_ENDIAN)*, false otherwise
  25  */
  26 static inline bool tinydrm_machine_little_endian(void)
  27 {
  28 #if defined(__LITTLE_ENDIAN)
  29         return true;
  30 #else
  31         return false;
  32 #endif
  33 }
  34
  35 int tinydrm_display_pipe_init(struct drm_device *drm,
  36                               struct drm_simple_display_pipe *pipe,
  37                               const struct drm_simple_display_pipe_funcs *funcs,
  38                               int connector_type,
  39                               const uint32_t *formats,
  40                               unsigned int format_count,
  41                               const struct drm_display_mode *mode,
  42                               unsigned int rotation);
  43
  44 int tinydrm_spi_transfer(struct spi_device *spi, u32 speed_hz,
  45                          struct spi_transfer *header, u8 bpw, const void *buf,
  46                          size_t len);
  47
  48 #endif /* __LINUX_TINYDRM_HELPERS_H */