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Bug 711900 - sys-kernel/mips-sources - improve fbdev impact on IP28 (PATCH)
Summary: sys-kernel/mips-sources - improve fbdev impact on IP28 (PATCH)
Status: UNCONFIRMED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: MIPS Linux
: Normal normal (vote)
Assignee: MIPS Porters
URL:
Whiteboard:
Keywords: PATCH
Depends on: 710678
Blocks:
  Show dependency tree
 
Reported: 2020-03-08 20:57 UTC by Barnabás Virágh
Modified: 2020-03-08 23:43 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


Attachments
The patch (mips_ip28_impact_fbdev_improvements.patch,3.68 KB, patch)
2020-03-08 20:59 UTC, Barnabás Virágh
Details | Diff

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Description Barnabás Virágh 2020-03-08 20:57:22 UTC
=sys-kernel/mips-sources-4.19.79.ip28

For the upcoming xf86-video-impact driver, a new sysctl function is needed in the impact fbdev in the kernel, to efficiently handle multi area DMA flushes on the non-cache-coherent architecture of IP28 (SGI Indigo2 Impact 10000).
https://gitlab.freedesktop.org/xorg/driver/xf86-video-impact/-/merge_requests/1

Without this patch, the xf86-video-impact driver falls back to PIO mode, which is slow.

For the patch to work, bug 710678 filed patch as a prerequisite is assumed.

Reproducible: Always
Comment 1 Barnabás Virágh 2020-03-08 20:59:18 UTC
Created attachment 617538 [details, diff]
The patch