1 /* 2 * (C) Copyright 2010 3 * NVIDIA Corporation <www.nvidia.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #ifndef __ASM_ARCH_TEGRA_DISPLAY_H 9 #define __ASM_ARCH_TEGRA_DISPLAY_H 10 11 /** 12 * Register a new display based on device tree configuration. 13 * 14 * The frame buffer can be positioned by U-Boot or overriden by the fdt. 15 * You should pass in the U-Boot address here, and check the contents of 16 * struct fdt_disp_config to see what was actually chosen. 17 * 18 * @param blob Device tree blob 19 * @param default_lcd_base Default address of LCD frame buffer 20 * @return 0 if ok, -1 on error (unsupported bits per pixel) 21 */ 22 int tegra_display_probe(const void *blob, void *default_lcd_base); 23 24 /** 25 * Return the current display configuration 26 * 27 * @return pointer to display configuration, or NULL if there is no valid 28 * config 29 */ 30 struct fdt_disp_config *tegra_display_get_config(void); 31 32 /** 33 * Perform the next stage of the LCD init if it is time to do so. 34 * 35 * LCD init can be time-consuming because of the number of delays we need 36 * while waiting for the backlight power supply, etc. This function can 37 * be called at various times during U-Boot operation to advance the 38 * initialization of the LCD to the next stage if sufficient time has 39 * passed since the last stage. It keeps track of what stage it is up to 40 * and the time that it is permitted to move to the next stage. 41 * 42 * The final call should have wait=1 to complete the init. 43 * 44 * @param blob fdt blob containing LCD information 45 * @param wait 1 to wait until all init is complete, and then return 46 * 0 to return immediately, potentially doing nothing if it is 47 * not yet time for the next init. 48 */ 49 int tegra_lcd_check_next_stage(const void *blob, int wait); 50 51 /** 52 * Set up the maximum LCD size so we can size the frame buffer. 53 * 54 * @param blob fdt blob containing LCD information 55 */ 56 void tegra_lcd_early_init(const void *blob); 57 58 #endif /*__ASM_ARCH_TEGRA_DISPLAY_H*/ 59