From: Adam Szyma <adamszyma@wp.pl>
To: val@packett.cool
Cc: linux-arm-msm@vger.kernel.org
Subject: Dell Inspiron 14 Plus 5441 - keyboard backlight and panel (x1e80100 Thena) [thread overview]
Message-ID: <b95de355a68f63ce209270fe36fffd33@wp.pl> (raw)
Hi Val,
I have successfully installed Ubuntu 26.04 with kernel 7.0.0-32-qcom-x1e
on a Dell Inspiron 14 Plus 5441 (x1e80100, codename Thena).
The device uses the same x1-dell-thena.dtsi as the Inspiron 7441/Latitude 7455,
but has two differences that need addressing:
1. KEYBOARD BACKLIGHT:
The dell-xps-ec driver (dell,xps13-9345-ec) is present in the kernel but
the DTS node for EC is missing from x1-dell-thena.dtsi.
Keyboard: hid-over-i2c, vendor 0x6243, i2c-4 (b80000.i2c), address 0x05.
Could you add the EC node to x1-dell-thena.dtsi to enable keyboard
backlight on this device?
2. DISPLAY PANEL:
The Inspiron 5441 uses a CSOT MPP36 T9 panel (CSW 0x143d, 1920x1200@60Hz)
instead of the panel in the 7441. Brightness control is non-functional.
I have already submitted a patch to dri-devel@lists.freedesktop.org:
Subject: [PATCH] drm/panel/panel-edp: Add CSOT MPP36 T9 eDP panel
Date: 2026-04-29, Message-ID: <20260429145251.8445-1-adamszyma@wp.pl>
Hardware info:
Model: Dell Inspiron 14 Plus 5441
SoC: Qualcomm X1E80100 (Snapdragon X Elite)
Panel EDID: CSW 0x143d, MPP36 CSOT T9, 1920x1200@60Hz, 301x188mm
Keyboard: HID over I2C, vendor 0x6243, product 0x0000
Tested-by: Adam Szyma <adamszyma@wp.pl>
Best regards,
Adam Szyma
next reply other threads:[~2026-04-29 15:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-29 15:35 Adam Szyma [this message]
2026-04-30 2:48 ` Dell Inspiron 14 Plus 5441 - keyboard backlight and panel (x1e80100 Thena) Val Packett
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