/* SPDX-License-Identifier: GPL-2.0-only */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "display.h" #include "gpio.h" /* Bridge functions */ static void bridge_ps8640_power_on(void) { /* * PS8640 power-on sequence is described in chapter 14, PS8640_DS_V1.4_20200210.docx * - set VDD12 to be 1.2V * - delay 100us * - set VDD33 to be 3.3V * - pull hign PD# * - pull down RST# * - delay 2ms * - pull high RST# * - delay more than 50ms (55ms for margin) * - pull down RST# * - delay more than 50ms (55ms for margin) * - pull high RST# */ /* Set VRF12 to 1.2V and VCN33 to 3.3V */ mainboard_set_regulator_voltage(MTK_REGULATOR_VRF12, 1200000); udelay(100); mainboard_set_regulator_voltage(MTK_REGULATOR_VCN33, 3300000); udelay(200); /* Turn on bridge */ gpio_output(GPIO_EDPBRDG_PWREN, 1); gpio_output(GPIO_EDPBRDG_RST_L, 0); mdelay(2); gpio_output(GPIO_EDPBRDG_RST_L, 1); mdelay(55); gpio_output(GPIO_EDPBRDG_RST_L, 0); mdelay(55); gpio_output(GPIO_EDPBRDG_RST_L, 1); } static int bridge_ps8640_get_edid(u8 i2c_bus, struct edid *edid) { const u8 chip = 0x8; if (ps8640_init(i2c_bus, chip) < 0) { printk(BIOS_ERR, "%s: Can't init PS8640 bridge\n", __func__); return -1; } if (ps8640_get_edid(i2c_bus, chip, edid) < 0) { printk(BIOS_ERR, "%s: Can't get panel's edid\n", __func__); return -1; } return 0; } static int bridge_ps8640_post_power_on(u8 i2c_bus, struct edid *edid) { /* Do nothing */ return 0; } static void bridge_anx7625_power_on(void) { /* 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 bridge_anx7625_get_edid(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_anx7625_post_power_on(u8 i2c_bus, struct edid *edid) { return anx7625_dp_start(i2c_bus, edid); } /* Display function */ static void backlight_control(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); } static const struct edp_bridge anx7625_bridge = { .power_on = bridge_anx7625_power_on, .get_edid = bridge_anx7625_get_edid, .post_power_on = bridge_anx7625_post_power_on, }; static const struct edp_bridge ps8640_bridge = { .power_on = bridge_ps8640_power_on, .get_edid = bridge_ps8640_get_edid, .post_power_on = bridge_ps8640_post_power_on, }; _Static_assert(CONFIG(BOARD_GOOGLE_KINGLER_COMMON) + CONFIG(BOARD_GOOGLE_KRABBY_COMMON) == 1, "Exactly one of KINGLER and KRABBY must be set"); int configure_display(void) { struct edid edid; const u8 i2c_bus = I2C0; const struct edp_bridge *bridge; uint32_t board_version = board_id(); if (CONFIG(BOARD_GOOGLE_KINGLER_COMMON)) if (CONFIG(BOARD_GOOGLE_STEELIX) && board_version < 2) bridge = &ps8640_bridge; else bridge = &anx7625_bridge; else /* BOARD_GOOGLE_KRABBY_COMMON */ bridge = &ps8640_bridge; printk(BIOS_INFO, "%s: Starting display init\n", __func__); mtk_i2c_bus_init(i2c_bus, I2C_SPEED_FAST); /* Set up backlight control pins as output pin and power-off by default */ backlight_control(); assert(bridge->power_on); bridge->power_on(); assert(bridge->get_edid); if (bridge->get_edid(i2c_bus, &edid) < 0) { printk(BIOS_ERR, "%s: Failed to get edid\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_power_on(i2c_bus, &edid) < 0) { printk(BIOS_ERR, "%s: Failed to post power on bridge\n", __func__); return -1; } mtk_ddp_mode_set(&edid); fb_new_framebuffer_info_from_edid(&edid, (uintptr_t)0); return 0; }