** Also affects: linux-raspi (Ubuntu Hirsute)
Importance: Undecided
Status: New
** Changed in: linux-raspi (Ubuntu Focal)
Status: New => Won't Fix
** Changed in: linux-raspi (Ubuntu Groovy)
Status: New => Won't Fix
** Description changed:
We currently use the dwc_otg driver from raspberrypi on 5.4 and 5.8
armhf and arm64 kernels. That driver supports FIQ interrupt handling
(presumable for better performance) but lacks the maintenance and bug
fixing of the vanilla upstream dwc driver. Turns out that FIQ handling
is disabled in the dwc_otg driver on arm64 so it makes little sense to
use that driver on arm64.
+
+ In fact, upstream raspberrypi recommends to use the dwc2 driver on
+ arm64.
** Summary changed:
- Switch to the upstream dwc driver on arm64
+ Use the upstream dwc2 driver on arm64
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-raspi in Ubuntu.
https://bugs.launchpad.net/bugs/1900665
Title:
Use the upstream dwc2 driver on arm64
Status in linux-raspi package in Ubuntu:
New
Status in linux-raspi source package in Focal:
Won't Fix
Status in linux-raspi source package in Groovy:
Won't Fix
Status in linux-raspi source package in Hirsute:
New
Bug description:
We currently use the dwc_otg driver from raspberrypi on 5.4 and 5.8
armhf and arm64 kernels. That driver supports FIQ interrupt handling
(presumable for better performance) but lacks the maintenance and bug
fixing of the vanilla upstream dwc driver. Turns out that FIQ handling
is disabled in the dwc_otg driver on arm64 so it makes little sense to
use that driver on arm64.
In fact, upstream raspberrypi recommends to use the dwc2 driver on
arm64.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1900665/+subscriptions
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