diff options
Diffstat (limited to 'src/mainboard/google/corsola/panel_ps8640.c')
| -rw-r--r-- | src/mainboard/google/corsola/panel_ps8640.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/src/mainboard/google/corsola/panel_ps8640.c b/src/mainboard/google/corsola/panel_ps8640.c new file mode 100644 index 0000000000..bb1e4eb7ce --- /dev/null +++ b/src/mainboard/google/corsola/panel_ps8640.c @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <console/console.h> +#include <delay.h> +#include <drivers/parade/ps8640/ps8640.h> +#include <edid.h> +#include <gpio.h> +#include <soc/i2c.h> +#include <soc/regulator.h> + +#include "display.h" +#include "gpio.h" + +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 struct panel_serializable_data ps8640_data; + +static struct panel_description ps8640_bridge = { + .s = &ps8640_data, + .orientation = LB_FB_ORIENTATION_NORMAL, +}; + +struct panel_description *get_ps8640_description(void) +{ + mtk_i2c_bus_init(BRIDGE_I2C, I2C_SPEED_FAST); + bridge_ps8640_power_on(); + if (bridge_ps8640_get_edid(BRIDGE_I2C, &ps8640_bridge.s->edid) < 0) { + printk(BIOS_ERR, "Can't get panel's edid\n"); + return NULL; + } + return &ps8640_bridge; +} |