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author | Hung-Te Lin <hungte@chromium.org> | 2019-07-25 17:09:53 +0800 |
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committer | Julius Werner <jwerner@chromium.org> | 2019-08-15 00:54:12 +0000 |
commit | 00e1ee9242cc0796f09ddb2c019d3dce35e13832 (patch) | |
tree | 596fdd9ca8d11248626239c3b5f6f516fb849488 /src/mainboard/google/kukui/panel_ps8640.c | |
parent | 1d5fc281c88632268df8b796ca331c583d695436 (diff) | |
download | coreboot-00e1ee9242cc0796f09ddb2c019d3dce35e13832.tar.xz |
mb/google/kukui: Support eDP panels via PS8640
Some Kukui variants may have eDP panels connected via a PS8640 MIPI bridge
which we may retrieve EDID dynamically.
BUG=b:b:137517228
TEST=emerge-jacuzzi coreboot chromeos-bootimage; boots and see display.
Change-Id: I85aac5255e6a3e6019299670486214ecffbf9801
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34516
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/kukui/panel_ps8640.c')
-rw-r--r-- | src/mainboard/google/kukui/panel_ps8640.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/mainboard/google/kukui/panel_ps8640.c b/src/mainboard/google/kukui/panel_ps8640.c new file mode 100644 index 0000000000..d2f65a8d95 --- /dev/null +++ b/src/mainboard/google/kukui/panel_ps8640.c @@ -0,0 +1,73 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2019 Google 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 <console/console.h> +#include <delay.h> +#include <drivers/parade/ps8640/ps8640.h> +#include <edid.h> +#include <gpio.h> +#include <soc/i2c.h> +#include <string.h> + +#include "panel.h" + + +static void power_on_ps8640(void) +{ + gpio_output(GPIO_MIPIBRDG_RST_L_1V8, 0); + gpio_output(GPIO_PP1200_MIPIBRDG_EN, 1); + gpio_output(GPIO_VDDIO_MIPIBRDG_EN, 1); + mdelay(2); + gpio_output(GPIO_MIPIBRDG_PWRDN_L_1V8, 1); + mdelay(2); + gpio_output(GPIO_MIPIBRDG_RST_L_1V8, 1); + gpio_output(GPIO_PP3300_LCM_EN, 1); +} + +static void dummy_power_on(void) +{ + /* The panel has been already powered on when getting panel information + * so we should do nothing here. + */ +} + +static struct panel_description ps8640_panel = { + .power_on = dummy_power_on, + .orientation = LB_FB_ORIENTATION_NORMAL, + .init = { INIT_END_CMD }, +}; + +struct panel_description *get_panel_description(int panel_id) +{ + static char mode_name[64]; + + /* To read panel EDID, we have to first power on PS8640. */ + power_on_ps8640(); + + u8 i2c_bus = 4, i2c_addr = 0x08; + mtk_i2c_bus_init(i2c_bus); + + ps8640_init(i2c_bus, i2c_addr); + struct edid *edid = &ps8640_panel.edid; + if (ps8640_get_edid(i2c_bus, i2c_addr, edid)) { + printk(BIOS_ERR, "Can't get panel's edid\n"); + return NULL; + } + /* TODO(hungte) Move this to ps8640_get_edid */ + snprintf(mode_name, sizeof(mode_name), "%dx%d@%dHz", edid->x_resolution, + edid->y_resolution, edid->mode.refresh); + ps8640_panel.edid.mode.name = mode_name; + return &ps8640_panel; +} |