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/* SPDX-License-Identifier: GPL-2.0-only */
#include <boardid.h>
#include <cbfs.h>
#include <console/console.h>
#include <edid.h>
#include <gpio.h>
#include <identity.h>
#include <soc/gpio_common.h>
#include <string.h>
#include "gpio.h"
#include "panel.h"
static void get_mipi_cmd_from_cbfs(struct panel_description *desc)
{
/*
* The CBFS file name is panel-{MANUFACTURER}-${PANEL_NAME}, where MANUFACTURER is 3
* characters and PANEL_NAME is usually 13 characters.
*/
char cbfs_name[64];
static union {
u8 raw[4 * 1024]; /* Most panels only need < 2K. */
struct panel_serializable_data s;
} buffer;
if (!desc->name) {
printk(BIOS_ERR, "Missing panel CBFS file name.\n");
return;
}
snprintf(cbfs_name, sizeof(cbfs_name), "panel-%s", desc->name);
if (cbfs_load(cbfs_name, buffer.raw, sizeof(buffer)))
desc->s = &buffer.s;
else
printk(BIOS_ERR, "Missing %s in CBFS.\n", cbfs_name);
}
struct panel_description __weak *get_panel_description(uint32_t panel_id)
{
printk(BIOS_WARNING, "%s: %s: the panel configuration is not ready\n",
__func__, mainboard_part_number);
return NULL;
}
struct panel_description *get_active_panel(void)
{
uint32_t active_panel_id = panel_id();
struct panel_description *panel = get_panel_description(active_panel_id);
if (!panel || panel->disp_path == DISP_PATH_NONE) {
printk(BIOS_ERR, "%s: Panel %u is not supported.\n", __func__, active_panel_id);
return NULL;
}
/* For eDP, we will get edid after eDP initialization is done, so we return directly. */
if (panel->disp_path == DISP_PATH_EDP) {
printk(BIOS_INFO, "%s: Use eDP as the display\n", __func__);
return panel;
}
/* We need to find init cmds for MIPI panel from CBFS */
get_mipi_cmd_from_cbfs(panel);
if (!panel->s)
return NULL;
const struct edid *edid = &panel->s->edid;
const char *name = edid->ascii_string;
if (name[0] == '\0') {
name = "unknown name";
printk(BIOS_INFO, "%s: Found ID %u: '%s %s' %dx%d@%dHz\n", __func__,
active_panel_id, edid->manufacturer_name, name, edid->mode.ha,
edid->mode.va, edid->mode.refresh);
}
return panel;
}
void configure_mipi_pwm_backlight(void)
{
gpio_output(GPIO_AP_DISP_BKLTEN, 0);
gpio_output(GPIO_MIPI_BL_PWM_1V8, 0);
}
void fill_lp_backlight_gpios(struct lb_gpios *gpios)
{
struct panel_description *panel = get_active_panel();
if (!panel || panel->disp_path == DISP_PATH_NONE)
return;
struct lb_gpio mipi_pwm_gpios[] = {
{GPIO_MIPI_BL_PWM_1V8.id, ACTIVE_HIGH, -1, "PWM control"},
};
struct lb_gpio edp_pwm_gpios[] = {
{GPIO_EDP_BL_PWM_1V8.id, ACTIVE_HIGH, -1, "PWM control"},
};
if (panel->pwm_ctrl_gpio) {
/* PWM control for typical eDP and MIPI panels */
if (panel->disp_path == DISP_PATH_MIPI)
lb_add_gpios(gpios, mipi_pwm_gpios, ARRAY_SIZE(mipi_pwm_gpios));
else
lb_add_gpios(gpios, edp_pwm_gpios, ARRAY_SIZE(edp_pwm_gpios));
}
struct lb_gpio backlight_gpios[] = {
{GPIO_AP_DISP_BKLTEN.id, ACTIVE_HIGH, -1, "backlight enable"},
};
lb_add_gpios(gpios, backlight_gpios, ARRAY_SIZE(backlight_gpios));
}
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