Re: [PATCH v2] drm/panel-edp: Add LGD LP129WT112684 panel

[Doug Anderson]

Hi,

On Fri, Nov 13, 2026 at 9:16 AM Tawheed Makhdoomi <_@xxxxxxxxxx> wrote:
>
> Add the LG Display LP129WT112684 12.9" 2880x1920 eDP panel used in the
> Microsoft Surface Pro X (SQ1). Without this entry the panel is driven
> with the conservative fallback timings and probe hits the "Unknown
> panel" WARN.
>
> I don't have a datasheet for this panel, so the timings are a guess
> based on similar panels: delay_200_500_e200_d200 is what the other LGD
> 12.9" panel in the table (0x06b2, LP129WT232166) and most other LGD
> entries use. With this entry the panel is detected and the display comes
> up on every one of the 38 boots logged so far on my Surface Pro X (SQ1).
>
> EDID, read from /sys/class/drm/card1-eDP-1/edid:
>
> 00 ff ff ff ff ff ff 00 30 e4 55 05 a0 28 09 00
> 00 1c 01 04 a5 1b 12 78 03 ee 95 a3 54 4c 99 26
> 0f 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
> 01 01 01 01 01 01 de 8a 40 78 b0 80 37 70 30 20
> 55 04 12 b7 10 00 00 19 00 00 00 fd 00 1e 3c 00
> 00 24 04 0a 48 14 14 14 14 00 00 00 00 fe 00 4c
> 47 44 5f 44 56 31 2e 30 5f 0a 20 20 00 00 00 fe
> 00 4c 50 31 32 39 57 54 31 31 32 36 38 34 00 41
>
>   Manufacturer: LGD
>   Model: 0x0555
>   Made in: 2018
>   Alphanumeric data strings: 'LGD_DV1.0_', 'LP129WT112684'
>   DTD 1: 2880x1920 60.000 Hz 3:2 (274 mm x 183 mm), pixel clock 355.50 MHz
>
> Signed-off-by: Tawheed Makhdoomi <_@xxxxxxxxxx>
> ---
> Changes in v2:
> - Include the EDID in the commit message.
> - Say explicitly that the timings are a guess (no datasheet) and how
>   they were picked, as Doug asked.
> - v1: https://lore.kernel.org/r/20261112154444.417-1-_@xxxxxxxxxx
>
>  drivers/gpu/drm/panel/panel-edp.c | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>

Pushed to drm-misc-next:

[1/1] drm/panel-edp: Add LGD LP129WT112684 panel
      commit: fc72cd52fb284f3707fa36a68ea5a22543a51d71