AMD Sends Out Patches For New AMDGPU DAL Display Driver, Adds 93k Lines Of Code
Written by Michael Larabel in Radeon on 11 February 2016 at 03:15 PM EST. 38 Comments
RADEON --
AMD's new "DAL" display driver has been posted for review as the new display component to the AMDGPU kernel DRM driver.

This DAL driver supports AMD's Carrizo, Tonga, and Fiji graphics processors atop the AMDGPU kernel driver. This is the driver they will use moving forward for adding new display features to the AMDGPU driver. This code-base also moves the open-source driver closer to being on par with Catalyst and its display capabilities.

The AMDGPU DAL driver finally provides AMD support for implementing the atomic mode-setting API and also provides DisplayPort Multi-Stream Transport (MST), HDMI 2.0 for Carrizo, better PowerPlay integration, better multi-display support, broader support of display dongles, timing synchronization between DisplayPort and HDMI, and other improvements.

This DAL code has been in development for the past several months and is an important part of AMD's plans for allowing Catalyst to become isolated to a user-space blob while riding off the open-source kernel driver. With DAL, the display capabilities of the open-source driver are much closer to feature parity with Catalyst -- for Tonga / Carrizo / Fiji.

This code change adds in over 93,000 lines of new code to the Linux kernel! [287 files changed, 93942 insertions(+), 30 deletions(-)] Hopefully it will get reviewed, tested well, and merged for the Linux 4.6 kernel. For now the massive patch series can be found on dri-devel.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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