| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2016 Rockchip Inc. |
| * |
| * 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; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <arch/cache.h> |
| #include <arch/mmu.h> |
| #include <arch/io.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <delay.h> |
| #include <edid.h> |
| #include <gpio.h> |
| #include <stdlib.h> |
| #include <stddef.h> |
| #include <string.h> |
| #include <soc/addressmap.h> |
| #include <soc/clock.h> |
| #include <soc/display.h> |
| #include <soc/edp.h> |
| #include <soc/gpio.h> |
| #include <soc/grf.h> |
| #include <soc/mmu_operations.h> |
| #include <soc/soc.h> |
| #include <soc/vop.h> |
| |
| #include "chip.h" |
| |
| void rk_display_init(device_t dev) |
| { |
| struct edid edid; |
| struct soc_rockchip_rk3399_config *conf = dev->chip_info; |
| enum vop_modes detected_mode = VOP_MODE_UNKNOWN; |
| int retry_count = 0; |
| |
| /* let's use vop0 in rk3399 */ |
| uint32_t vop_id = 0; |
| |
| switch (conf->vop_mode) { |
| case VOP_MODE_NONE: |
| return; |
| case VOP_MODE_AUTO_DETECT: |
| /* try EDP first, then HDMI */ |
| case VOP_MODE_EDP: |
| printk(BIOS_DEBUG, "Attempting to set up EDP display.\n"); |
| rkclk_configure_vop_aclk(vop_id, 200 * MHz); |
| |
| /* select edp signal from vop0 */ |
| write32(&rk3399_grf->soc_con20, RK_CLRBITS(1 << 5)); |
| |
| /* select edp clk from SoC internal 24M crystal, otherwise, |
| * it will source from edp's 24M clock (that depends on |
| * edp vendor, could be unstable) |
| */ |
| write32(&rk3399_grf->soc_con25, RK_SETBITS(1 << 11)); |
| |
| retry_edp: |
| rk_edp_init(); |
| if (rk_edp_get_edid(&edid) == 0) { |
| detected_mode = VOP_MODE_EDP; |
| break; |
| } |
| goto edp_error; |
| |
| /* fall thru */ |
| case VOP_MODE_HDMI: |
| printk(BIOS_WARNING, "HDMI display is NOT supported yet.\n"); |
| return; |
| default: |
| printk(BIOS_WARNING, "Cannot read any EDID info, aborting.\n"); |
| return; |
| } |
| |
| if (rkclk_configure_vop_dclk(vop_id, |
| edid.mode.pixel_clock * KHz)) { |
| printk(BIOS_WARNING, "config vop err\n"); |
| return; |
| } |
| |
| edid_set_framebuffer_bits_per_pixel(&edid, |
| conf->framebuffer_bits_per_pixel, 0); |
| rkvop_mode_set(vop_id, &edid, detected_mode); |
| |
| rkvop_prepare(vop_id, &edid); |
| |
| switch (detected_mode) { |
| case VOP_MODE_HDMI: |
| /* should not be here before HDMI supported */ |
| return; |
| case VOP_MODE_EDP: |
| default: |
| /* will enable edp in depthcharge */ |
| if (rk_edp_prepare()) |
| goto edp_error; |
| mainboard_power_on_backlight(); |
| break; |
| } |
| |
| set_vbe_mode_info_valid(&edid, (uintptr_t)0); |
| return; |
| |
| edp_error: |
| if (retry_count++ < 3) { |
| /* rst edp */ |
| write32(&cru_ptr->softrst_con[17], |
| RK_SETBITS(1 << 12 | 1 << 13)); |
| udelay(1); |
| write32(&cru_ptr->softrst_con[17], |
| RK_CLRBITS(1 << 12 | 1 << 13)); |
| goto retry_edp; |
| } |
| printk(BIOS_WARNING, "epd initial error\n"); |
| } |