mb/google/asurada: Initialize display

Enable ANX7625 panel and configure display in mainboard_init() to
support display in firmware screen.

BUG=b:155713214
BRANCH=none
TEST=Recovery screen is shown in recovery mode.

Signed-off-by: Huijuan Xie <huijuan.xie@mediatek.corp-partner.google.com>
Change-Id: If730c42451f7b392285df686abc4ca252d8d42cf
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46578
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

src/mainboard/google/asurada/Kconfig

@@ -27,6 +27,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_FORCE_NATIVE_VGA_INIT
 	select HAVE_LINEAR_FRAMEBUFFER
+	select DRIVER_ANALOGIX_ANX7625
 
 config MAINBOARD_DIR
 	string

src/mainboard/google/asurada/mainboard.c

@@ -1,11 +1,21 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <bl31.h>
+#include <bootmode.h>
 #include <console/console.h>
+#include <delay.h>
 #include <device/device.h>
 #include <device/mmio.h>
+#include <drivers/analogix/anx7625/anx7625.h>
+#include <edid.h>
+#include <gpio.h>
+#include <soc/ddp.h>
 #include <soc/dpm.h>
+#include <soc/dsi.h>
 #include <soc/gpio.h>
+#include <soc/gpio_common.h>
+#include <soc/i2c.h>
+#include <soc/mtcmos.h>
 #include <soc/regulator.h>
 #include <soc/spm.h>
 #include <soc/usb.h>
@@ -27,6 +37,17 @@
 #define MSDC1_GPIO_MODE1_MASK	0x7
 #define MSDC1_GPIO_MODE1_VALUE	0x1
 
+/* GPIO names */
+#define GPIO_EDPBRDG_INT_ODL		GPIO(EINT6)		/* 6 */
+#define GPIO_EDPBRDG_PWREN		GPIO(DSI_TE)		/* 41 */
+#define GPIO_EDPBRDG_RST_ODL		GPIO(LCM_RST)		/* 42 */
+#define GPIO_EN_PP3300_EDP_DX		GPIO(PERIPHERAL_EN1)	/* 127 */
+#define GPIO_EN_PP1800_EDPBRDG_DX	GPIO(PERIPHERAL_EN2)	/* 128 */
+#define GPIO_EN_PP1000_EDPBRDG		GPIO(PERIPHERAL_EN3)	/* 129 */
+#define GPIO_EN_PP3300_DISPLAY_DX	GPIO(CAM_CLK3)		/* 136 */
+#define GPIO_AP_EDP_BKLTEN		GPIO(KPROW1)		/* 152 */
+#define GPIO_BL_PWM_1V8			GPIO(DISP_PWM)		/* 40 */
+
 static void register_reset_to_bl31(void)
 {
 	static struct bl_aux_param_gpio param_reset = {
@@ -38,6 +59,75 @@ static void register_reset_to_bl31(void)
 	register_bl31_aux_param(&param_reset.h);
 }
 
+/* Set up backlight control pins as output pin and power-off by default */
+static void configure_backlight_and_bridge(void)
+{
+	/* Disable backlight before turning on bridge */
+	gpio_output(GPIO_AP_EDP_BKLTEN, 0);
+	gpio_output(GPIO_BL_PWM_1V8, 0);
+	gpio_output(GPIO_EN_PP3300_DISPLAY_DX, 1);
+
+	/* Turn on bridge */
+	gpio_output(GPIO_EDPBRDG_RST_ODL, 0);
+	gpio_output(GPIO_EN_PP1000_EDPBRDG, 1);
+	gpio_output(GPIO_EN_PP1800_EDPBRDG_DX, 1);
+	gpio_output(GPIO_EN_PP3300_EDP_DX, 1);
+	mdelay(2);
+	gpio_output(GPIO_EDPBRDG_PWREN, 1);
+	mdelay(10);
+	gpio_output(GPIO_EDPBRDG_RST_ODL, 1);
+}
+
+static bool configure_display(void)
+{
+	struct edid edid;
+	const u8 i2c_bus = 3;
+
+	printk(BIOS_INFO, "%s: Starting display init\n", __func__);
+
+	configure_backlight_and_bridge();
+	mtk_i2c_bus_init(i2c_bus);
+
+	if (anx7625_init(i2c_bus)) {
+		printk(BIOS_ERR, "%s: Can't init ANX7625 bridge\n", __func__);
+		return false;
+	}
+
+	if (anx7625_dp_get_edid(i2c_bus, &edid)) {
+		printk(BIOS_ERR, "%s: Can't get panel's edid\n", __func__);
+		return false;
+	}
+	if (anx7625_dp_start(i2c_bus, &edid) < 0) {
+		printk(BIOS_ERR, "%s: Can't start display via ANX7625\n", __func__);
+		return false;
+	}
+
+	const char *name = edid.ascii_string;
+	if (name[0] == '\0')
+		name = "unknown name";
+	printk(BIOS_INFO, "%s: '%s %s' %dx%d@%dHz\n", __func__,
+	       edid.manufacturer_name, name, edid.mode.ha, edid.mode.va,
+	       edid.mode.refresh);
+
+	mtcmos_display_power_on();
+	mtcmos_protect_display_bus();
+
+	edid_set_framebuffer_bits_per_pixel(&edid, 32, 0);
+	mtk_ddp_init();
+	u32 mipi_dsi_flags = (MIPI_DSI_MODE_VIDEO |
+			      MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
+			      MIPI_DSI_MODE_LPM |
+			      MIPI_DSI_MODE_EOT_PACKET);
+
+	if (mtk_dsi_init(mipi_dsi_flags, MIPI_DSI_FMT_RGB888, 4, &edid, NULL) < 0) {
+		printk(BIOS_ERR, "%s: Failed in DSI init\n", __func__);
+		return false;
+	}
+	mtk_ddp_mode_set(&edid);
+	set_vbe_mode_info_valid(&edid, 0);
+	return true;
+}
+
 static void configure_emmc(void)
 {
 	void *gpio_base = (void *)IOCFG_TL_BASE;
@@ -115,6 +205,11 @@ static void mainboard_init(struct device *dev)
 
 	if (spm_init())
 		printk(BIOS_ERR, "spm init fail, system suspend may stuck\n");
+
+	if (display_init_required())
+		configure_display();
+	else
+		printk(BIOS_INFO, "%s: Skipped display init\n", __func__);
 }
 
 static void mainboard_enable(struct device *dev)