62ea2eeba7
The WL-355608-A8 is a 3.5" 640x480@60Hz RGB LCD display from an unknown
OEM used in a number of handheld gaming devices made by Anbernic.
Limited information is available online however the panel timing values
(below) have been obtained from the vendor BSP. The panel appears to
integrate a NV3052C LCD driver (or clone). Available devices address it
in SPI/RGB mode, with the timing signals generated from the device
SoC (Allwinner H700) and passed through.
Add a panel definition and display mode to the existing NV3502C driver.
It was assumed during bringup that the initialisation sequence was the
same as the existing Fascontek FS035VG158 panel, proved working during
experimentation, however subsequent dumping of the init sequence with a
logic analyser confirms one small change to VCOM_ADJ3 from 0x4a to 0x44,
therefore a separate set of registers is also added.
Timings:
| Active | FP | Sync | BP | Total
-----------|--------|------|------|------|-------
Horizontal | 640 | 64 | 20 | 46 | 770
Vertical | 480 | 21 | 4 | 15 | 520
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
Co-developed-by: Hironori KIKUCHI <kikuchan98@gmail.com>
Signed-off-by: Hironori KIKUCHI <kikuchan98@gmail.com>
Reviewed-by: John Watts <contact@jookia.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://lore.kernel.org/r/20240530211415.44201-4-ryan@testtoast.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240530211415.44201-4-ryan@testtoast.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.