Re: [PATCH 4/5] drm/panel-edp: Add Sharp LQ138P1JX61 (Surface Laptop 8th Ed.)

[Doug Anderson]

Hi,

On Tue, Oct 6, 2026 at 2:50 AM Gopikrishna Garmidi
<gopikrishna.garmidi@xxxxxxxxxxxxxxxx> wrote:
>
> The internal eDP panel of the Microsoft Surface Laptop 13.8" 8th Edition
> is not in edp_panels[], so panel-edp falls back to conservative timings.
>
> EDID, read over the panel's DP AUX DDC bus:
>
>   00 ff ff ff ff ff ff 00 4d 10 72 15 a1 31 05 54
>   31 23 01 04 b5 1d 13 78 03 7d 77 ad 50 46 ad 26
>   0f 50 53 00 00 00 01 01 01 01 01 01 01 01 01 01
>   01 01 01 01 01 01 60 b6 00 a0 90 00 2b 60 30 20
>   3a 00 23 c2 10 00 00 18 60 b6 00 a0 90 00 56 66
>   30 20 3a 00 23 c2 10 00 00 18 00 00 00 fd 00 18
>   78 be be 2f 01 00 00 00 00 00 00 00 00 00 00 fc
>   00 4c 51 31 33 38 50 31 4a 58 36 31 0a 20 01 4e
>
>   02 03 0f 00 e3 05 80 00 e6 06 05 01 73 6a 0b 00
>   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 aa
>
>   Manufacturer: SHP
>   Model: 0x1572
>   Made in: week 49 of 2025
>   Display Product Name: 'LQ138P1JX61'
>   DTD 1: 2304x1536 120.000329 Hz 3:2 (291 mm x 194 mm)
>   DTD 2: 2304x1536  60.000164 Hz 3:2 (291 mm x 194 mm)
>
> No datasheet is available, so use delay_200_500_e200: it keeps the
> 200 ms enable delay of the conservative fallback, but uses the 500 ms
> unprepare delay of the real panels in the table. This matches the entry
> for the closely related Sharp LQ120P1JX51 (SHP 0x15a7).
>
> Assisted-by: LLM
> Signed-off-by: Gopikrishna Garmidi <gopikrishna.garmidi@xxxxxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/panel/panel-edp.c | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>

Pushed to drm-misc-next:

[4/5] drm/panel-edp: Add Sharp LQ138P1JX61 (Surface Laptop 8th Ed.)
      commit: 7cf88d0a3f5324eb44c2ae9840568adb2374ec10