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/*
* 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"
static void reset_edp(void)
{
/* 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));
printk(BIOS_WARNING, "Retrying epd initialization.\n");
}
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);
rkclk_configure_edp(25 * 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:
while (retry_count++ < 3) {
rk_edp_init();
if (rk_edp_get_edid(&edid) == 0) {
detected_mode = VOP_MODE_EDP;
break;
}
if (retry_count == 3) {
printk(BIOS_WARNING, "Warning: epd initialization failed.\n");
return;
} else {
reset_edp();
}
}
break;
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()) {
reset_edp();
goto retry_edp; /* Rerun entire init sequence */
}
mainboard_power_on_backlight();
break;
}
set_vbe_mode_info_valid(&edid, (uintptr_t)0);
return;
}
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