Bug 711900

Summary:	sys-kernel/mips-sources - improve fbdev impact on IP28 (PATCH)
Product:	Gentoo Linux	Reporter:	Barnabás Virágh <cyborgyn>
Component:	Current packages	Assignee:	MIPS Porters <mips>
Status:	UNCONFIRMED ---
Severity:	normal	CC:	jstein, matoro_bugzilla_gentoo
Priority:	Normal	Keywords:	PATCH
Version:	unspecified
Hardware:	MIPS
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:	710678
Bug Blocks:
Attachments:	The patch

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