Display

https://www.panelook.com/LTL106AL01-002_Samsung_10.6_LCM_overview_19126.htmlarrow-up-right

Timing

Raw EDID from ACPI

0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x4c, 0xa3, 0x42, 0x31, 0x00, 0x00, 0x00, 0x00,
0x00, 0x15, 0x01, 0x04, 0xa0, 0x17, 0x0d, 0x78, 0x0a, 0x87, 0xf5, 0x94, 0x57, 0x4f, 0x8c, 0x27,
0x27, 0x50, 0x54, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x1e, 0x1c, 0x56, 0xb0, 0x50, 0x00, 0x0a, 0x30, 0x0e, 0x38,
0x13, 0x00, 0xeb, 0x84, 0x00, 0x00, 0x00, 0x19, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x44, 0xdc, 0x03, 0x74, 0x00, 0x00, 0x00, 0x00, 0xfe, 0x00, 0x53,
0x41, 0x4d, 0x53, 0x55, 0x4e, 0x47, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0xfe,
0x00, 0x31, 0x30, 0x36, 0x41, 0x4c, 0x30, 0x31, 0x2d, 0x30, 0x30, 0x31, 0x0a, 0x20, 0x00, 0x7e
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128B
Binary version of EDID

Decoded EDID

Many tools exist which can decode EDID. On Ubuntu you can use edid-decode. The ouput is below...

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1KB
Human Readable version of EDID

You can also use this EDID readerarrow-up-right page

Translated to devicetree

WIP At the we use a samsung display with same resolution and similar timings which works. But to optimize the devicetree someone has to decode EDID to panel-timings

https://elixir.bootlin.com/linux/latest/source/include/drm/drm_modes.h#L201arrow-up-right

https://glenwing.github.io/docs/VESA-DMT-1.12.pdfarrow-up-right page 57

GPIOs

Controlling the following GPIOs from UEFI Shell gave the result below. The GPIOs were extracted from ACPI

GPIO

Backlight

Logo

Note

Function

B2

Y

N

Image fades out

LVDS power down

DD0

N

Y

Logo can bee seen with

external light source

backlight power

DD2

N

N

Display is dead

panel power

H0

N

Y

PWM brightness control

PWM brightness

Connector

Pin

2/3 Panel VDD

GPIO DD2

25 BL_PWM

GPIO H0

26 Backlight enable

GPIO DD0

28/29/30 LED Anode

Always connected to 12V

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