From: Tomi Valkeinen <tomi.valkeinen@ti.com>
To: Chandrabhanu Mahapatra <cmahapatra@ti.com>
Cc: linux-omap@vger.kernel.org, linux-fbdev@vger.kernel.org
Subject: Re: [PATCH] OMAPDSS: DISPC: Add predecimation limit for TILER based rotations
Date: Tue, 25 Sep 2012 13:40:54 +0000 [thread overview]
Message-ID: <1348580454.2342.40.camel@deskari> (raw)
In-Reply-To: <1348468707-5142-1-git-send-email-cmahapatra@ti.com>
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On Mon, 2012-09-24 at 12:08 +0530, Chandrabhanu Mahapatra wrote:
> In OMAP4 and OMAP5 when TILER 2D burst mode is used, a maximum of one line can
> be skipped as per the respective TRMs. The MBlockStride OCP signal, which is
> sum of ROWINC and image width in memory, is only 17 bits wide. In 2D mode TILER
> supports 8192, 16384, 32768 and 65536 values of MBlockStride. In case when 2 or
> more lines are skipped the ROWINC value exceeds 65536 resulting in OCP errors.
> So, maximum vertical predecimation achievable is 2.
>
> Signed-off-by: Chandrabhanu Mahapatra <cmahapatra@ti.com>
> ---
> drivers/video/omap2/dss/dispc.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
Thanks, looks fine to me.
Tomi
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prev parent reply other threads:[~2012-09-25 13:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-24 6:50 [PATCH] OMAPDSS: DISPC: Add predecimation limit for TILER based rotations Chandrabhanu Mahapatra
2012-09-25 13:40 ` Tomi Valkeinen [this message]
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