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Date: Tue, 24 Jun 2014 19:33:10 +0900 From: Alexandre Courbot <acourbot@...dia.com> To: Russell King - ARM Linux <linux@....linux.org.uk> CC: David Airlie <airlied@...ux.ie>, Ben Skeggs <bskeggs@...hat.com>, Lucas Stach <dev@...xeye.de>, Thierry Reding <thierry.reding@...il.com>, "gnurou@...il.com" <gnurou@...il.com>, "nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>, "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH v2 2/3] drm/ttm: introduce dma cache sync helpers On 06/24/2014 07:02 PM, Russell King - ARM Linux wrote: > On Tue, Jun 24, 2014 at 06:54:26PM +0900, Alexandre Courbot wrote: >> From: Lucas Stach <dev@...xeye.de> >> >> On architectures for which access to GPU memory is non-coherent, >> caches need to be flushed and invalidated explicitly at the >> appropriate places. Introduce two small helpers to make things >> easy for TTM-based drivers. > > Have you run this with DMA API debugging enabled? I suspect you haven't, > and I recommend that you do. # cat /sys/kernel/debug/dma-api/error_count 162621 (╯°□°）╯︵ ┻━┻) -- 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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