diff options
Diffstat (limited to 'qemu/roms/u-boot/drivers/video/tegra.c')
| -rw-r--r-- | qemu/roms/u-boot/drivers/video/tegra.c | 299 |
1 files changed, 0 insertions, 299 deletions
diff --git a/qemu/roms/u-boot/drivers/video/tegra.c b/qemu/roms/u-boot/drivers/video/tegra.c deleted file mode 100644 index 57cb0074e..000000000 --- a/qemu/roms/u-boot/drivers/video/tegra.c +++ /dev/null @@ -1,299 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <fdtdec.h> -#include <lcd.h> - -#include <asm/system.h> -#include <asm/gpio.h> - -#include <asm/arch/clock.h> -#include <asm/arch/funcmux.h> -#include <asm/arch/pinmux.h> -#include <asm/arch/pwm.h> -#include <asm/arch/display.h> -#include <asm/arch-tegra/timer.h> - -DECLARE_GLOBAL_DATA_PTR; - -/* These are the stages we go throuh in enabling the LCD */ -enum stage_t { - STAGE_START, - STAGE_PANEL_VDD, - STAGE_LVDS, - STAGE_BACKLIGHT_VDD, - STAGE_PWM, - STAGE_BACKLIGHT_EN, - STAGE_DONE, -}; - -static enum stage_t stage; /* Current stage we are at */ -static unsigned long timer_next; /* Time we can move onto next stage */ - -/* Our LCD config, set up in handle_stage() */ -static struct fdt_panel_config config; -struct fdt_disp_config *disp_config; /* Display controller config */ - -enum { - /* Maximum LCD size we support */ - LCD_MAX_WIDTH = 1366, - LCD_MAX_HEIGHT = 768, - LCD_MAX_LOG2_BPP = 4, /* 2^4 = 16 bpp */ -}; - -vidinfo_t panel_info = { - /* Insert a value here so that we don't end up in the BSS */ - .vl_col = -1, -}; - -#ifndef CONFIG_OF_CONTROL -#error "You must enable CONFIG_OF_CONTROL to get Tegra LCD support" -#endif - -static void update_panel_size(struct fdt_disp_config *config) -{ - panel_info.vl_col = config->width; - panel_info.vl_row = config->height; - panel_info.vl_bpix = config->log2_bpp; -} - -/* - * Main init function called by lcd driver. - * Inits and then prints test pattern if required. - */ - -void lcd_ctrl_init(void *lcdbase) -{ - int type = DCACHE_OFF; - int size; - - assert(disp_config); - - /* Make sure that we can acommodate the selected LCD */ - assert(disp_config->width <= LCD_MAX_WIDTH); - assert(disp_config->height <= LCD_MAX_HEIGHT); - assert(disp_config->log2_bpp <= LCD_MAX_LOG2_BPP); - if (disp_config->width <= LCD_MAX_WIDTH - && disp_config->height <= LCD_MAX_HEIGHT - && disp_config->log2_bpp <= LCD_MAX_LOG2_BPP) - update_panel_size(disp_config); - size = lcd_get_size(&lcd_line_length); - - /* Set up the LCD caching as requested */ - if (config.cache_type & FDT_LCD_CACHE_WRITE_THROUGH) - type = DCACHE_WRITETHROUGH; - else if (config.cache_type & FDT_LCD_CACHE_WRITE_BACK) - type = DCACHE_WRITEBACK; - mmu_set_region_dcache_behaviour(disp_config->frame_buffer, size, type); - - /* Enable flushing after LCD writes if requested */ - lcd_set_flush_dcache(config.cache_type & FDT_LCD_CACHE_FLUSH); - - debug("LCD frame buffer at %08X\n", disp_config->frame_buffer); -} - -ulong calc_fbsize(void) -{ - return (panel_info.vl_col * panel_info.vl_row * - NBITS(panel_info.vl_bpix)) / 8; -} - -void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) -{ -} - -void tegra_lcd_early_init(const void *blob) -{ - /* - * Go with the maximum size for now. We will fix this up after - * relocation. These values are only used for memory alocation. - */ - panel_info.vl_col = LCD_MAX_WIDTH; - panel_info.vl_row = LCD_MAX_HEIGHT; - panel_info.vl_bpix = LCD_MAX_LOG2_BPP; -} - -/** - * Decode the panel information from the fdt. - * - * @param blob fdt blob - * @param config structure to store fdt config into - * @return 0 if ok, -ve on error - */ -static int fdt_decode_lcd(const void *blob, struct fdt_panel_config *config) -{ - int display_node; - - disp_config = tegra_display_get_config(); - if (!disp_config) { - debug("%s: Display controller is not configured\n", __func__); - return -1; - } - display_node = disp_config->panel_node; - if (display_node < 0) { - debug("%s: No panel configuration available\n", __func__); - return -1; - } - - config->pwm_channel = pwm_request(blob, display_node, "nvidia,pwm"); - if (config->pwm_channel < 0) { - debug("%s: Unable to request PWM channel\n", __func__); - return -1; - } - - config->cache_type = fdtdec_get_int(blob, display_node, - "nvidia,cache-type", - FDT_LCD_CACHE_WRITE_BACK_FLUSH); - - /* These GPIOs are all optional */ - fdtdec_decode_gpio(blob, display_node, "nvidia,backlight-enable-gpios", - &config->backlight_en); - fdtdec_decode_gpio(blob, display_node, "nvidia,lvds-shutdown-gpios", - &config->lvds_shutdown); - fdtdec_decode_gpio(blob, display_node, "nvidia,backlight-vdd-gpios", - &config->backlight_vdd); - fdtdec_decode_gpio(blob, display_node, "nvidia,panel-vdd-gpios", - &config->panel_vdd); - - return fdtdec_get_int_array(blob, display_node, "nvidia,panel-timings", - config->panel_timings, FDT_LCD_TIMINGS); -} - -/** - * Handle the next stage of device init - */ -static int handle_stage(const void *blob) -{ - debug("%s: stage %d\n", __func__, stage); - - /* do the things for this stage */ - switch (stage) { - case STAGE_START: - /* Initialize the Tegra display controller */ - if (tegra_display_probe(gd->fdt_blob, (void *)gd->fb_base)) { - printf("%s: Failed to probe display driver\n", - __func__); - return -1; - } - - /* get panel details */ - if (fdt_decode_lcd(blob, &config)) { - printf("No valid LCD information in device tree\n"); - return -1; - } - - /* - * It is possible that the FDT has requested that the LCD be - * disabled. We currently don't support this. It would require - * changes to U-Boot LCD subsystem to have LCD support - * compiled in but not used. An easier option might be to - * still have a frame buffer, but leave the backlight off and - * remove all mention of lcd in the stdout environment - * variable. - */ - - funcmux_select(PERIPH_ID_DISP1, FUNCMUX_DEFAULT); - - fdtdec_setup_gpio(&config.panel_vdd); - fdtdec_setup_gpio(&config.lvds_shutdown); - fdtdec_setup_gpio(&config.backlight_vdd); - fdtdec_setup_gpio(&config.backlight_en); - - /* - * TODO: If fdt includes output flag we can omit this code - * since fdtdec_setup_gpio will do it for us. - */ - if (fdt_gpio_isvalid(&config.panel_vdd)) - gpio_direction_output(config.panel_vdd.gpio, 0); - if (fdt_gpio_isvalid(&config.lvds_shutdown)) - gpio_direction_output(config.lvds_shutdown.gpio, 0); - if (fdt_gpio_isvalid(&config.backlight_vdd)) - gpio_direction_output(config.backlight_vdd.gpio, 0); - if (fdt_gpio_isvalid(&config.backlight_en)) - gpio_direction_output(config.backlight_en.gpio, 0); - break; - case STAGE_PANEL_VDD: - if (fdt_gpio_isvalid(&config.panel_vdd)) - gpio_direction_output(config.panel_vdd.gpio, 1); - break; - case STAGE_LVDS: - if (fdt_gpio_isvalid(&config.lvds_shutdown)) - gpio_set_value(config.lvds_shutdown.gpio, 1); - break; - case STAGE_BACKLIGHT_VDD: - if (fdt_gpio_isvalid(&config.backlight_vdd)) - gpio_set_value(config.backlight_vdd.gpio, 1); - break; - case STAGE_PWM: - /* Enable PWM at 15/16 high, 32768 Hz with divider 1 */ - pinmux_set_func(PMUX_PINGRP_GPU, PMUX_FUNC_PWM); - pinmux_tristate_disable(PMUX_PINGRP_GPU); - - pwm_enable(config.pwm_channel, 32768, 0xdf, 1); - break; - case STAGE_BACKLIGHT_EN: - if (fdt_gpio_isvalid(&config.backlight_en)) - gpio_set_value(config.backlight_en.gpio, 1); - break; - case STAGE_DONE: - break; - } - - /* set up timer for next stage */ - timer_next = timer_get_us(); - if (stage < FDT_LCD_TIMINGS) - timer_next += config.panel_timings[stage] * 1000; - - /* move to next stage */ - stage++; - return 0; -} - -int tegra_lcd_check_next_stage(const void *blob, int wait) -{ - if (stage == STAGE_DONE) - return 0; - - do { - /* wait if we need to */ - debug("%s: stage %d\n", __func__, stage); - if (stage != STAGE_START) { - int delay = timer_next - timer_get_us(); - - if (delay > 0) { - if (wait) - udelay(delay); - else - return 0; - } - } - - if (handle_stage(blob)) - return -1; - } while (wait && stage != STAGE_DONE); - if (stage == STAGE_DONE) - debug("%s: LCD init complete\n", __func__); - - return 0; -} - -void lcd_enable(void) -{ - /* - * Backlight and power init will be done separately in - * tegra_lcd_check_next_stage(), which should be called in - * board_late_init(). - * - * U-Boot code supports only colour depth, selected at compile time. - * The device tree setting should match this. Otherwise the display - * will not look right, and U-Boot may crash. - */ - if (disp_config->log2_bpp != LCD_BPP) { - printf("%s: Error: LCD depth configured in FDT (%d = %dbpp)" - " must match setting of LCD_BPP (%d)\n", __func__, - disp_config->log2_bpp, disp_config->bpp, LCD_BPP); - } -} |