sharp-drm-driver's Introduction

Sharp Memory LCD Kernel Driver

DRM kernel driver for 2.7" 400x240 Sharp memory LCD panel.

Cleaning old drivers

The bbqX0kbd driver has been renamed to beepy-kbd, and sharp to sharp-drm.

Driver packages will detect if one of these old modules is installed and cancel installation of the package.

Remove the following files:

/lib/modules/<uname>/extra/bbqX0kbd.ko*
/lib/modules/<uname>/extra/sharp.ko*
/boot/overlays/i2c-bbqX0kbd.dtbo
/boot/overlays/sharp.dtbo

Rebuild the module list:

depmod -a

Remove the following lines from /boot/config.txt:

dtoverlay=bbqX0kbd,irq_pin=4
dtoverlay=sharp

Remove the following lines from /etc/modules:

bbqX0kbd
sharp

Installation

Install the Linux kernel headers

sudo apt-get install raspberrypi-kernel-headers

To build, install, and enable the kernel module:

make
sudo make install

To remove:

sudo make uninstall

Original fbdev module readme with pinouts and build instructions

References

Original SPI and GPIO kernel driver at:

https://github.com/w4ilun/Sharp-Memory-LCD-Kernel-Driver

Sharp datasheet:

https://www.sharpsde.com/fileadmin/products/Displays/2016_SDE_App_Note_for_Memory_LCD_programming_V1.3.pdf

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sharp-drm-driver's Issues

Not building on current Raspberry Pi OS version (10-10-23)

Neither the sharp-drm driver nor its companion keyboard driver build on the Raspberry Pi OS Lite 32-bit image from the Raspberry Pi Imager, dated October 10th 2023 (https://downloads.raspberrypi.com/raspios_lite_armhf/images/raspios_lite_armhf-2023-10-10/2023-10-10-raspios-bookworm-armhf-lite.img.xz).

bash-log.txt
sharp-drm-make.log

I've also detailed the issue in an issue raised on the documentation at
sqfmi/beepy-docs#21

And added keyboard driver make logs this issue at
ardangelo/beepberry-keyboard-driver#4

The driver does not compile on systems with kernel version 6.x

I am trying to set up my beepy with Arch Linux ARM, using the files from https://github.com/DelusionalLogic/beepy-packages
The PKGBUILD file pulls in the git repository, so I am using the current source.

When the system tries build the module, I get two compile time errors (see attached make.log)

The first points to a function which was available with kernel 5.x, but seems to be removed with later versions.
I found this as a indication: https://www.spinics.net/lists/dri-devel/msg374191.html
Arch Linux ARM for Raspberry Pi comes out of the box with kernel 6.6.14

The second just needs another include file (drm/drm_fbdev_generic.h).

I know that Arch Linux is probably out of scope here, but sooner or later Raspbian will get newer kernels, so this is more or less future proofing ;)

sharp-drm-make.log