Kernel: Linux 5.10 and Linux 5.11 Changes
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Laptop Touchpad Improvements, New Joystick Driver For Linux 5.10 - Phoronix
The Linux 5.10 merge window is closing this weekend but there still is new code landing for this last complete kernel series of 2020.
The input subsystem updates were sent in on Friday morning and include some new drivers and other work. As previously reported, there is better support for newer Synaptics laptop touchpads with this kernel. There is Synaptics RMI4 F3A support for buttons on newer touchpads helping the likes of the ThinkPad X1 Extreme Gen1 and P1 Gen2. There is also InterTouch now enabled for the ThinkPad P1/X1E Gen2 devices.
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Sensor Fusion Hub Driver For AMD Laptops With Gyroscopes Is Coming To Linux 5.11 - LinuxReviews
It's been a long and hard road to acceptance for AMD's Sensor Fusion Hub Linux driver. The first revision was submitted to the Linux kernel Mailing List in January 2020. It took eight revisions and a lot of effort before Jiří Kosina finally accepted it into the hid.git#for-5.11 tree, almost guaranteeing that it will become a part of Linux 5.11.
[...]
Sandeep Singh didn't give up. He submitted a fourth revision with fingers crossed on February 12th, 2020. Intel's Linux driver engineer Andy Shevchenko rejected it on the grounds that it had long list of issues and concluded that it would need "a bit of work".
Sandeep Singh sent a firth revision to the Linux Kernel Mailing List on the May 29th. Intel's Andy Shevchenko several additional objections and Sandeep Singh had to go back to the drawing-board.
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AMD SFH Driver To Land With Linux 5.11 For Better Ryzen Laptop Handling In 2021 - Phoronix
It was sadly too late for squeezing into the current Linux 5.10 merge window but it looks like for Linux 5.11 in early 2021 the AMD Sensor Fusion Hub "SFH" driver will make its long awaited debut.
The AMD SFH driver is similar to the long-standing Intel ISH driver for supporting the sensor hub on modern laptops. The AMD SFH support is needed for laptops bearing gyroscopic sensors and other capabilities.
Back in January AMD finally published the Sensor Fusion Hub Linux driver for supporting the Ryzen laptops of recent years. With time the driver was revised to address various feedback but wasn't quick to get picked up for mainline and at times several weeks passing between code revisions.
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Intel Sends Linux Kernel Patches For VRR / Adaptive-Sync Enablement - Phoronix
For months now Intel's open-source Linux driver stack has been preparing for VRR support with Gen11/Gen12 graphics. We've seen user-space patches by Intel around VRR while now they are finally sending out their key Linux kernel driver patches with the i915 DRM code.
This kernel code is what's needed for actually enabling DisplayPort 1.4 Adaptive-Sync / Variable Refresh Rate on capable Intel graphics hardware with capable displays. The 11 patches add just under 300 lines of new code to their kernel driver in making the necessary VRR preparations and handling for this display feature.
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