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Date: Sat, 23 Jun 2012 08:46:59 +0800 From: Huacai Chen <chenhuacai@...il.com> To: Ralf Baechle <ralf@...ux-mips.org> Cc: Arnaud Patard <arnaud.patard@...-net.org>, linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org, Fuxin Zhang <zhangfx@...ote.com>, Zhangjin Wu <wuzhangjin@...il.com>, Huacai Chen <chenhc@...ote.com>, Hongliang Tao <taohl@...ote.com>, Hua Yan <yanh@...ote.com>, dri-devel@...ts.freedesktop.org Subject: Re: [PATCH V3 11/16] drm/radeon: Make radeon card usable for Loongson. On Fri, Jun 22, 2012 at 7:11 PM, Ralf Baechle <ralf@...ux-mips.org> wrote: > On Fri, Jun 22, 2012 at 06:55:40PM +0800, Huacai Chen wrote: > >> > btw, would it be a good idea to use uncached accelerated instead ? >> I have tried uncached accelerated, there will be random points in the >> monitor, it seems a hw issue... > > Have you flushed the pages from memory before switching their cache mode > to uncached accelerated? The MIPS architecture defines the result of > mixing cache modes as UNPREDICTABLE so be careful to flush caches before > switching cache mode of a page. Not because of flushing, CPU designing team told us a method but very complex, and that method will cause other performance drop. So, we won't use uncached accelerate mode. > > Ralf -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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