| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <assert.h> |
| #include <console/console.h> |
| #include <delay.h> |
| #include <drivers/analogix/anx7625/anx7625.h> |
| #include <drivers/parade/ps8640/ps8640.h> |
| #include <gpio.h> |
| #include <soc/ddp.h> |
| #include <soc/dsi.h> |
| #include <soc/gpio_common.h> |
| #include <soc/regulator.h> |
| #include <soc/i2c.h> |
| #include <soc/mtcmos.h> |
| |
| #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 |
| * - 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_vol(MTK_REGULATOR_VRF12, 1200000); |
| mainboard_set_regulator_vol(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; |
| |
| if (CONFIG(BOARD_GOOGLE_KINGLER_COMMON)) |
| 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; |
| } |