src/soc/rockchip/rk3288/display.c

/* SPDX-License-Identifier: GPL-2.0-only */

#include <arch/cache.h>
#include <device/mmio.h>
#include <console/console.h>
#include <device/device.h>
#include <delay.h>
#include <edid.h>
#include <gpio.h>
#include <string.h>
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/display.h>
#include <soc/edp.h>
#include <soc/hdmi.h>
#include <soc/gpio.h>
#include <soc/grf.h>
#include <soc/soc.h>
#include <soc/vop.h>
#include <framebuffer_info.h>

#include "chip.h"

void rk_display_init(struct device *dev, u32 lcdbase, unsigned long fb_size)
{
	struct edid edid;
	uint32_t val;
	struct soc_rockchip_rk3288_config *conf = dev->chip_info;
	uint32_t lower = ALIGN_DOWN(lcdbase, MiB);
	uint32_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
	enum vop_modes detected_mode = VOP_MODE_UNKNOWN;

	printk(BIOS_SPEW, "LCD framebuffer @%p\n", (void *)(lcdbase));
	memset((void *)lcdbase, 0, fb_size);	/* clear the framebuffer */
	dcache_clean_invalidate_by_mva((void *)lower, upper - lower);
	mmu_config_range(lower / MiB, (upper - lower) / MiB, DCACHE_OFF);

	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 setup EDP display.\n");
		rkclk_configure_edp();
		rkclk_configure_vop_aclk(conf->vop_id, 192 * MHz);

		/* grf_edp_ref_clk_sel: from internal 24MHz or 27MHz clock */
		write32(&rk3288_grf->soc_con12, RK_SETBITS(1 << 4));

		/* select epd signal from vop0 or vop1 */
		val = (conf->vop_id == 1) ? RK_SETBITS(1 << 5) :
					    RK_CLRBITS(1 << 5);
		write32(&rk3288_grf->soc_con6, val);

		rk_edp_init();

		if (rk_edp_get_edid(&edid) == 0) {
			detected_mode = VOP_MODE_EDP;
			break;
		} else {
			printk(BIOS_WARNING, "Cannot get EDID from EDP.\n");
			if (conf->vop_mode == VOP_MODE_EDP)
				return;
		}
		__fallthrough;
	case VOP_MODE_HDMI:
		printk(BIOS_DEBUG, "Attempting to setup HDMI display.\n");
		rkclk_configure_hdmi();
		rkclk_configure_vop_aclk(conf->vop_id, 384 * MHz);
		rk_hdmi_init(conf->vop_id);

		if (rk_hdmi_get_edid(&edid) == 0) {
			detected_mode = VOP_MODE_HDMI;
			break;
		} else {
			printk(BIOS_WARNING, "Cannot get EDID from HDMI.\n");
			if (conf->vop_mode == VOP_MODE_HDMI)
				return;
		}
		__fallthrough;
	default:
		printk(BIOS_WARNING, "Cannot read any edid info, aborting.\n");
		return;
	}

	if (rkclk_configure_vop_dclk(conf->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(conf->vop_id, &edid, detected_mode);

	rkvop_prepare(conf->vop_id, &edid);
	rkvop_enable(conf->vop_id, lcdbase);

	switch (detected_mode) {
	case VOP_MODE_HDMI:
		if (rk_hdmi_enable(&edid)) {
			printk(BIOS_WARNING, "hdmi enable err\n");
			return;
		}

		/*
		 * HACK: if we do remove this delay, HDMI TV may not show
		 * anythings. So we make an delay here, ensure TV have
		 * enough time to respond.
		 */
		mdelay(2000);
		break;

	case VOP_MODE_EDP:
	default:
		if (rk_edp_prepare()) {
			printk(BIOS_WARNING, "edp prepare err\n");
			return;
		}
		if (rk_edp_enable()) {
			printk(BIOS_WARNING, "edp enable err\n");
			return;
		}
		mainboard_power_on_backlight();
		break;
	}

	fb_new_framebuffer_info_from_edid(&edid, (uintptr_t)lcdbase);
}