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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 <device/mmio.h>
#include <console/console.h>
#include <device/device.h>
#include <delay.h>
#include <edid.h>
#include <gpio.h>
#include <stddef.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/mipi.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 EDP initialization.\n");
}
void rk_display_init(struct device *dev)
{
struct edid edid;
struct soc_rockchip_rk3399_config *conf = dev->chip_info;
enum vop_modes detected_mode = VOP_MODE_UNKNOWN;
const struct mipi_panel_data *panel_data = NULL;
int retry_count_init = 0;
int retry_count_edp_prepare = 0;
/* let's use vop0 in rk3399 */
uint32_t vop_id = 0;
switch (conf->vop_mode) {
case VOP_MODE_NONE:
return;
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:
/* Reset in case code jumped here. */
retry_count_init = 0;
while (retry_count_init++ < 3) {
rk_edp_init();
if (rk_edp_get_edid(&edid) == 0) {
detected_mode = VOP_MODE_EDP;
break;
}
if (retry_count_init == 3) {
printk(BIOS_WARNING,
"Warning: EDP initialization failed.\n");
return;
} else {
reset_edp();
}
}
break;
case VOP_MODE_MIPI:
printk(BIOS_DEBUG, "Attempting to setup MIPI display.\n");
rkclk_configure_mipi();
rkclk_configure_vop_aclk(vop_id, 200 * MHz);
/*
* disable tx0 turnrequest, turndisable,
* forcetxstop, forcerxmode
*/
write32(&rk3399_grf->soc_con22, RK_CLRBITS(0xffff));
/* disable tx1 turndisable, forcetxstop, forcerxmode */
write32(&rk3399_grf->soc_con23, RK_CLRBITS(0xfff0));
/*
* enable dphy_tx1rx1_masterslavez,
* clear dphy_tx1rx1_enableclk,
* clear dphy_tx1rx1_basedir,
* disable tx1 turnrequest
*/
write32(&rk3399_grf->soc_con24,
RK_CLRSETBITS(1 << 7 | 1 << 6 | 1 << 5 | 0xf,
1 << 7 | 0 << 6 | 0 << 5 | 0 << 0));
/* dphy_tx1rx1_enable */
write32(&rk3399_grf->soc_con23, RK_SETBITS(0xf));
/* select mipi-dsi0 and mipi-dsi1 signal from vop0 */
write32(&rk3399_grf->soc_con20,
RK_CLRBITS((1 << 0) | (1 << 4)));
panel_data = mainboard_get_mipi_mode(&edid.mode);
if (panel_data) {
if (panel_data->mipi_num > 1)
detected_mode = VOP_MODE_DUAL_MIPI;
else
detected_mode = VOP_MODE_MIPI;
} else {
printk(BIOS_WARNING, "Can not get mipi panel data\n");
return;
}
break;
default:
printk(BIOS_WARNING, "Unsupported vop_mode, 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_MIPI:
case VOP_MODE_DUAL_MIPI:
rk_mipi_prepare(&edid, panel_data);
break;
case VOP_MODE_EDP:
/* will enable edp in depthcharge */
if (rk_edp_prepare()) {
if (retry_count_edp_prepare++ < 3) {
reset_edp();
/* Rerun entire init sequence */
goto retry_edp;
}
printk(BIOS_ERR, "EDP preparation failed.");
return;
}
break;
default:
break;
}
mainboard_power_on_backlight();
set_vbe_mode_info_valid(&edid, (uintptr_t)0);
return;
}
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