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mb/google/skywalker: Add MIPI panel GPIOs via lb_gpio

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Add MIPI panel related GPIOs to lb_gpio so Depthcharge can manage panel
reset and power signals when needed.

The following GPIOs are added:
- panel_resx (GPIO_EN_PP3300_EDP_X)
- mipi_iovcc_en (GPIO_EN_PP6000_MIPI_DISP)
- mipi_tp_rstn (GPIO_TCHSCR_RST_1V8_L)

This allows Depthcharge to release reset and disable IOVCC in the
required order to meet the panel power-off timing specification.

[1] Preliminary+specification+TL121BVMS07+-00+V01+20250721.pdf

BUG=b:461907110
TEST=Boot Padme and check cbmem log is correct.
BRANCH=skywalker

Change-Id: I7f73e41bc4814e8a5ca3579d235001cfafb77bf9
Signed-off-by: Yang Wu <wuyang5@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90646
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Yang Wu 2025-12-30 10:08:42 +08:00 • committed by Yidi Lin
commit 49d34a6f6c
1 changed files with 10 additions and 0 deletions
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10
src/mainboard/google/skywalker/chromeos.c
View file

@ -97,6 +97,16 @@ void fill_lb_gpios(struct lb_gpios *gpios)
{GPIO_EDP_BL_EN_1V8.id, ACTIVE_HIGH, -1, "backlight enable"},
};
lb_add_gpios(gpios, edp_pwm_backlight_gpios, ARRAY_SIZE(edp_pwm_backlight_gpios));
if (CONFIG(BOARD_GOOGLE_PADME)) {
/* Panel power control GPIOs for Depthcharge power-off sequence */
struct lb_gpio mipi_panel_gpios[] = {
{GPIO_EN_PP3300_EDP_X.id, ACTIVE_LOW, -1, "panel_resx"},
{GPIO_EN_PP6000_MIPI_DISP.id, ACTIVE_HIGH, -1, "mipi_iovcc_en"},
{GPIO_TCHSCR_RST_1V8_L.id, ACTIVE_LOW, -1, "mipi_tp_rstn"},
};
lb_add_gpios(gpios, mipi_panel_gpios, ARRAY_SIZE(mipi_panel_gpios));
}
}
int cr50_plat_irq_status(void)