diff options
| author | Jeremy Compostella <jeremy.compostella@intel.com> | 2022-12-02 11:07:09 -0700 |
|---|---|---|
| committer | Subrata Banik <subratabanik@google.com> | 2023-01-12 02:56:22 +0000 |
| commit | a439406bdcb00e5d039a695a051afcdd13d33a4b (patch) | |
| tree | cc4fc7910e1932faf541466f110e288f493a915e /src/mainboard/google/brya/variants/baseboard | |
| parent | 9df11973ca315594edede104ea71edc9c4af7521 (diff) | |
mb/google/brya: Add romstage early graphics for brya
BUG=b:252792591
BRANCH=firmware-brya-14505.B
TEST=On-screen text message seen during MRC training on skolas
with a few extra patches
Change-Id: I41c9cccb09dea52e2318f8f9ebeeda3697a7b514
Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70304
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71696
Diffstat (limited to 'src/mainboard/google/brya/variants/baseboard')
| -rw-r--r-- | src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb index 70e7779545..efc2fcbc98 100644 --- a/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb +++ b/src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb @@ -123,7 +123,37 @@ chip soc/intel/alderlake }" device domain 0 on - device ref igpu on end + # The timing values can be derived from datasheet of display panel + # You can use EDID string to identify the type of display on the board + # use below command to get display info from EDID + # strings /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/edid + + # refer to display PRM document (Volume 2b: Command Reference: Registers) + # for more info on display control registers + # https://01.org/linuxgraphics/documentation/hardware-specification-prms + #+-----------------------------+---------------------------------------+-----+ + #| Intel docs | devicetree.cb | eDP | + #+-----------------------------+---------------------------------------+-----+ + #| Power up delay | `gpu_panel_power_up_delay` | T3 | + #+-----------------------------+---------------------------------------+-----+ + #| Power on to backlight on | `gpu_panel_power_backlight_on_delay` | T7 | + #+-----------------------------+---------------------------------------+-----+ + #| Power Down delay | `gpu_panel_power_down_delay` | T10 | + #+-----------------------------+---------------------------------------+-----+ + #| Backlight off to power down | `gpu_panel_power_backlight_off_delay` | T9 | + #+-----------------------------+---------------------------------------+-----+ + #| Power Cycle Delay | `gpu_panel_power_cycle_delay` | T12 | + #+-----------------------------+---------------------------------------+-----+ + device ref igpu on + register "panel_cfg" = "{ + .up_delay_ms = 200, + .down_delay_ms = 50, + .cycle_delay_ms = 500, + .backlight_on_delay_ms = 1, + .backlight_off_delay_ms = 200, + .backlight_pwm_hz = 200, + }" + end device ref dtt on end device ref tbt_pcie_rp0 on end device ref tbt_pcie_rp1 on end |