mb/google/rauru: Add FORCE_MAX_SWING quirk for ATNA40HQ01-0

The flickering issue on ATNA40HQ01-0 panel can be resolved by setting
the swing level to the maximum (500mV). Therefore, add FORCE_MAX_SWING
quirk for ATNA40HQ01-0 panel where the fw config's OLED_WQXGA_PLUS field
is set to PRESENT. As OLED_WQXGA_PLUS is currently only available on
Navi, add an overridetree.cb for Navi.

BRANCH=rauru
BUG=b:392040003
TEST=check edp training pass and show log:
[INFO ]  fw_config match found: OLED_WQXGA_PLUS=PRESENT
...
[INFO ]  update_swing_preemphasis: Force swing setting to 3 (500 mV)

Change-Id: I4797ef8fe2257a9b578a969794d624d6e0f97d07
Signed-off-by: Yidi Lin <yidilin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87028
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>

src/mainboard/google/rauru/Kconfig

@@ -48,6 +48,12 @@ config MAINBOARD_PART_NUMBER
 	default "Navi" if BOARD_GOOGLE_NAVI
 	default "Rauru" if BOARD_GOOGLE_RAURU
 
+config VARIANT_DIR
+	default "navi" if BOARD_GOOGLE_NAVI
+
+config OVERRIDE_DEVICETREE
+	default "variants/\$(CONFIG_VARIANT_DIR)/overridetree.cb" if BOARD_GOOGLE_NAVI
+
 config BOOT_DEVICE_SPI_FLASH_BUS
 	int
 	default 8

src/mainboard/google/rauru/Makefile.mk

@@ -12,3 +12,7 @@ ramstage-y += boardid.c
 ramstage-y += mainboard.c
 ramstage-y += panel.c
 ramstage-y += regulator.c
+
+CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
+
+subdirs-y += variants/$(VARIANT_DIR)

src/mainboard/google/rauru/include/variants.h

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __MAINBOARD_GOOGLE_RAURU_VARIANTS_H__
+#define __MAINBOARD_GOOGLE_RAURU_VARIANTS_H__
+
+#include <soc/display.h>
+
+void fw_config_panel_override(struct panel_description *panel);
+
+#endif /* __MAINBOARD_GOOGLE_RAURU_VARIANTS_H__ */

src/mainboard/google/rauru/panel.c

@@ -4,6 +4,7 @@
 #include <gpio.h>
 #include <soc/ddp.h>
 #include <soc/dsi.h>
+#include <variants.h>
 
 #include "gpio.h"
 #include "panel.h"
@@ -20,7 +21,7 @@ static void power_on_panel(void)
 	gpio_set_mode(GPIO_EDP_HPD_1V8, GPIO_FUNC(EINT13, EDP_TX_HPD));
 }
 
-static struct panel_description panel = {
+static struct panel_description rauru_panel = {
 	.configure_backlight = configure_backlight,
 	.power_on = power_on_panel,
 	.disp_path = DISP_PATH_EDP,
@@ -41,10 +42,16 @@ static struct panel_description edp_panel = {
 	.orientation = LB_FB_ORIENTATION_NORMAL,
 };
 
+__weak void fw_config_panel_override(struct panel_description *panel)
+{
+}
+
 struct panel_description *get_active_panel(void)
 {
 	if (CONFIG(BOARD_GOOGLE_RAURU))
-		return &panel;
+		return &rauru_panel;
+
+	fw_config_panel_override(&edp_panel);
 
 	return &edp_panel;
 }

src/mainboard/google/rauru/variants/navi/Makefile.mk

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+ramstage-y += fw_config.c

src/mainboard/google/rauru/variants/navi/fw_config.c

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+
+#include <fw_config.h>
+#include <soc/display.h>
+#include <variants.h>
+
+void fw_config_panel_override(struct panel_description *panel)
+{
+	if (fw_config_probe(FW_CONFIG(OLED_WQXGA_PLUS, PRESENT)))
+		panel->quirks |= PANEL_QUIRK_FORCE_MAX_SWING;
+}

src/mainboard/google/rauru/variants/navi/overridetree.cb

@@ -0,0 +1,13 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+fw_config
+	field OLED_WQXGA_PLUS 1 1
+		option PRESENT	1
+		option ABSENT	0
+	end
+end
+
+chip soc/mediatek/mt8196
+	device domain 0 on
+	end
+end