arch/arm/include/asm/arch-tegra124/display.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  *  (C) Copyright 2010
   4  *  NVIDIA Corporation <www.nvidia.com>
   5  */
   6
   7 #ifndef __ASM_ARCH_TEGRA_DISPLAY_H
   8 #define __ASM_ARCH_TEGRA_DISPLAY_H
   9
  10 /**
  11  * Register a new display based on device tree configuration.
  12  *
  13  * The frame buffer can be positioned by U-Boot or overridden by the fdt.
  14  * You should pass in the U-Boot address here, and check the contents of
  15  * struct fdt_disp_config to see what was actually chosen.
  16  *
  17  * @param blob                  Device tree blob
  18  * @param default_lcd_base      Default address of LCD frame buffer
  19  * @return 0 if ok, -1 on error (unsupported bits per pixel)
  20  */
  21 int tegra_display_probe(const void *blob, void *default_lcd_base);
  22
  23 /**
  24  * Return the current display configuration
  25  *
  26  * @return pointer to display configuration, or NULL if there is no valid
  27  * config
  28  */
  29 struct fdt_disp_config *tegra_display_get_config(void);
  30
  31 /**
  32  * Perform the next stage of the LCD init if it is time to do so.
  33  *
  34  * LCD init can be time-consuming because of the number of delays we need
  35  * while waiting for the backlight power supply, etc. This function can
  36  * be called at various times during U-Boot operation to advance the
  37  * initialization of the LCD to the next stage if sufficient time has
  38  * passed since the last stage. It keeps track of what stage it is up to
  39  * and the time that it is permitted to move to the next stage.
  40  *
  41  * The final call should have wait=1 to complete the init.
  42  *
  43  * @param blob  fdt blob containing LCD information
  44  * @param wait  1 to wait until all init is complete, and then return
  45  *              0 to return immediately, potentially doing nothing if it is
  46  *              not yet time for the next init.
  47  */
  48 int tegra_lcd_check_next_stage(const void *blob, int wait);
  49
  50 /**
  51  * Set up the maximum LCD size so we can size the frame buffer.
  52  *
  53  * @param blob  fdt blob containing LCD information
  54  */
  55 void tegra_lcd_early_init(const void *blob);
  56
  57 #endif /*__ASM_ARCH_TEGRA_DISPLAY_H*/