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Raspberry Pi 5 Iommu Driver Being Worked on for the Mainline Linux Kernel
10 days ago
- Raspberry Pi 5's IOMMU driver is being adapted for the mainline Linux kernel, improving support over two years after release.
- Open-source developer Daniel Drake is leading the effort, adapting the downstream driver with enhancements like generic page table management.
- The driver integrates with the display controller for efficient graphics memory management, using 4KB pages, though 12KB is wasted with the default 16KB kernel PAGE_SIZE.
- Code review is underway, with the goal of upstream inclusion to benefit Raspberry Pi 5 users running the mainline kernel.
It's time to wake up: An Emacs alarm clock
13 hours ago
- The author has used a custom alarm clock system since 2011, relying on a numpad for input and a screen to display time, with a music server to play audio at the set time.
- The old system had reliability issues: network dependency, music server failures, and ambient music playback problems, leading to the use of an iPhone as a backup.
- The author decided to build a new self-contained alarm clock, keeping the numpad but eliminating network and external component dependencies.
- Components include a Raspberry Pi 5, a 4-inch screen, a Yoctopuce light sensor, a numpad, knobs, and a USB speaker, all housed in a custom wooden box.
- The author detailed the woodworking process: cutting laminated wood, using jigsaw blades, sanding, spackling, painting, and assembling the box with hinges and screws.
- Challenges included mis-measurements, cable compatibility issues, paint mishaps, and finding appropriate hardware for thin wood.
- The final clock works: the numpad is clicky, the interface is intuitive, and the light sensor dims the screen, though backlight control remains a limitation.
- The author declared the project a success, noting lessons learned about painting, workspace, and woodworking tools.
10" Raspberry Pi Touch Display 2 is $80
14 hours ago
- Raspberry Pi launched a new 10-inch Touch Display 2 priced at $80.
- It features a 1200x1920 resolution, 85-degree viewing angle, and 10-finger touch support.
- The display is compatible only with Raspberry Pi 5 and Compute Module boards, not with Pi 4 or earlier models.
- It is powered directly from the host Raspberry Pi and includes all necessary cables and mounting hardware.
- Raspberry Pi OS provides full driver support for the capacitive touchscreen without manual calibration.
- The display is suited for applications like home automation dashboards, kiosks, robotics interfaces, and digital signage.
- Previous 5-inch and 7-inch variants are available for older Raspberry Pi models.

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#raspberry pi

Raspberry Pi 5 Iommu Driver Being Worked on for the Mainline Linux Kernel

It's time to wake up: An Emacs alarm clock

10" Raspberry Pi Touch Display 2 is $80