From: Thierry Reding <thierry.reding@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 3/4] tegra: video: Always use write-through cache on LCD
Date: Wed, 20 Jan 2016 15:53:58 +0100 [thread overview]
Message-ID: <20160120145358.GB31427@ulmo> (raw)
In-Reply-To: <569D45EE.4020700@wwwdotorg.org>
On Mon, Jan 18, 2016 at 01:07:10PM -0700, Stephen Warren wrote:
> On 01/14/2016 01:26 PM, Simon Glass wrote:
> >This seems to give the best performance, so let's use it always.
>
> I thought we chose the current cache mode due to display corruption issues
> with other modes, but I tested a change that I believe does the same as this
> change on Seaboard without any apparent issue so,
>
> Acked-by: Stephen Warren <swarren@nvidia.com>
I think for framebuffers the best option is still write-combine, which
would be something like:
DCACHE_WRITECOMBINE = DCACHE_OFF | TTB_SECT_B_MASK
on ARM v7. Did you ever benchmark that against DCACHE_WRITETHROUGH? It
should be faster provided that you never read from the region.
Thierry
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next prev parent reply other threads:[~2016-01-20 14:53 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-14 20:26 [U-Boot] [PATCH 0/4] tegra: Move tegra20 towards the 'new' display bindings Simon Glass
2016-01-14 20:26 ` [U-Boot] [PATCH 1/4] tegra: dts: Sync seaboard device tree file with Linux Simon Glass
2016-01-18 19:32 ` Stephen Warren
2016-01-19 2:01 ` Simon Glass
2016-01-14 20:26 ` [U-Boot] [PATCH 2/4] video: tegra: Move to using simple-panel and pwm-backlight Simon Glass
2016-01-18 19:43 ` Stephen Warren
2016-01-19 2:08 ` Simon Glass
2016-01-19 16:49 ` Stephen Warren
2016-01-20 4:33 ` Simon Glass
2016-01-14 20:26 ` [U-Boot] [PATCH 3/4] tegra: video: Always use write-through cache on LCD Simon Glass
2016-01-18 20:07 ` Stephen Warren
2016-01-20 14:53 ` Thierry Reding [this message]
2016-01-20 16:18 ` Simon Glass
2016-01-14 20:26 ` [U-Boot] [PATCH 4/4] fdt: Drop some unused compatible strings Simon Glass
2016-01-14 20:34 ` [U-Boot] [PATCH 0/4] tegra: Move tegra20 towards the 'new' display bindings Lucas Stach
2016-01-14 23:12 ` Simon Glass
2016-01-18 19:52 ` Stephen Warren
2016-01-19 1:58 ` Simon Glass
2016-01-19 16:47 ` Stephen Warren
2016-01-20 15:37 ` Thierry Reding
2016-01-20 16:18 ` Simon Glass
2016-01-18 19:57 ` Stephen Warren
2016-01-19 1:58 ` Simon Glass
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