mb/google/corsola: Initialize kingler display

ANX7625 is used on Kingler board as the eDP bridge IC. Enable ANX7625
and configure display in mainboard_init() to support display in
firmware screen.

BUG=b:209930699
TEST=saw firmware display on eDP panel of kingler board.

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: Ie8de5d8ba150d3ae086c7635601dbc0846aebe91
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60398
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

1 files changed, 113 insertions, 0 deletions

diff --git a/src/mainboard/google/corsola/display.c b/src/mainboard/google/corsola/display.c
new file mode 100644
index 0000000000..6e4cbe596c
--- /dev/null
+++ b/src/mainboard/google/corsola/display.c
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <delay.h>
+#include <drivers/analogix/anx7625/anx7625.h>
+#include <edid.h>
+#include <gpio.h>
+#include <soc/ddp.h>
+#include <soc/dsi.h>
+#include <soc/gpio_common.h>
+#include <soc/i2c.h>
+#include <soc/mtcmos.h>
+
+#include "display.h"
+#include "gpio.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_DISP_X, 1);
+
+	/* Turn on bridge */
+	gpio_output(GPIO_EDPBRDG_RST_L, 0);
+	gpio_output(GPIO_EN_PP1000_EDPBRDG, 1);
+	gpio_output(GPIO_EN_PP1800_EDPBRDG, 1);
+	gpio_output(GPIO_EN_PP3300_EDPBRDG, 1);
+	mdelay(14);
+	gpio_output(GPIO_EDPBRDG_PWREN, 1);
+	mdelay(10);
+	gpio_output(GPIO_EDPBRDG_RST_L, 1);
+}
+
+static int anx7625_setup(u8 i2c_bus, struct edid *edid)
+{
+	if (anx7625_init(i2c_bus) < 0) {
+		printk(BIOS_ERR, "%s: Can't init ANX7625 bridge\n", __func__);
+		return -1;
+	}
+	if (anx7625_dp_get_edid(i2c_bus, edid) < 0) {
+		printk(BIOS_ERR, "%s: Can't get panel's edid\n", __func__);
+		return -1;
+	}
+	return 0;
+}
+
+static int bridge_setup(u8 i2c_bus, struct edid *edid)
+{
+	if (CONFIG(BOARD_GOOGLE_KINGLER_COMMON))
+		return anx7625_setup(i2c_bus, edid);
+	else
+		printk(BIOS_ERR, "%s: There is no bridge IC supported\n", __func__);
+
+	return -1;
+}
+
+static int bridge_post_poweron(u8 i2c_bus, struct edid *edid)
+{
+	if (CONFIG(BOARD_GOOGLE_KINGLER_COMMON))
+		return anx7625_dp_start(i2c_bus, edid);
+
+	return 0;
+}
+
+int configure_display(void)
+{
+	struct edid edid;
+	const u8 i2c_bus = I2C0;
+
+	printk(BIOS_INFO, "%s: Starting display init\n", __func__);
+
+	configure_backlight_and_bridge();
+	mtk_i2c_bus_init(i2c_bus, I2C_SPEED_FAST);
+
+	if (bridge_setup(i2c_bus, &edid) < 0) {
+		printk(BIOS_ERR, "%s: Failed to set bridge\n", __func__);
+		return -1;
+	}
+
+	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 -1;
+	}
+
+	if (bridge_post_poweron(i2c_bus, &edid) < 0) {
+		printk(BIOS_ERR, "%s: Failed to post poweron bridge\n", __func__);
+		return -1;
+	}
+
+	mtk_ddp_mode_set(&edid);
+	fb_new_framebuffer_info_from_edid(&edid, (uintptr_t)0);
+
+	return 0;
+}