APPLIED[Unstable]: [SRU] [H/Unstable/OEM-5.10] [PATCH 0/1] Fix non-working GPU on Some HP desktops
andrea.righi at canonical.com
Fri Jun 18 07:50:42 UTC 2021
Applied to unstable 5.13.
On Tue, Jun 08, 2021 at 12:39:08AM +0800, Kai-Heng Feng wrote:
> BugLink: https://bugs.launchpad.net/bugs/1931147
> Integrated GPU on AMD based HP desktop doesn't work.
> Coalesce host bridge contiguous apertures so the resources requested by
> child devices can be met.
> Boot affected systems. No picture from the iGPU.
> With the patch applied, iGPU can work normally.
> [Where problems could occur]
> Assume there are device A and device B and they request overlapped
> resource region, the original logic may not be able to allocate enough
> resource for A so device B claimed the resource in the end.
> Once the fix is applied, the region may be big enough for device A,
> hence device B won't be able to get the resource it needs.
> Hopefully we don't have such broken systems.
> Kai-Heng Feng (1):
> PCI: Coalesce host bridge contiguous apertures
> drivers/pci/probe.c | 49 +++++++++++++++++++++++++++++++++++++++++----
> 1 file changed, 45 insertions(+), 4 deletions(-)
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