linux-kernel - Re: [PATCH v3 04/14] gpu: ipu-v3: Fix U/V offset macros for planar 4:2:0

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Date:   Thu, 02 Aug 2018 11:51:55 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Steve Longerbeam <slongerbeam@...il.com>,
        linux-media@...r.kernel.org
Cc:     Steve Longerbeam <steve_longerbeam@...tor.com>,
        "open list:DRM DRIVERS FOR FREESCALE IMX" 
        <dri-devel@...ts.freedesktop.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 04/14] gpu: ipu-v3: Fix U/V offset macros for planar
 4:2:0

On Wed, 2018-08-01 at 12:12 -0700, Steve Longerbeam wrote:
> The U and V offset macros for planar 4:2:0 (U_OFFSET, V_OFFSET, and
> UV_OFFSET), are not correct. The height component to the offset was
> calculated as:
> 
> (pix->width * y / 4)
> 
> But this does not produce correct offsets for odd values of y (luma
> line #). The luma line # must be decimated by two to produce the
> correct U/V line #, so the correct formula is:
> 
> (pix->width * (y / 2) / 2)
> 
> Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>

Thank you this patch is applied to imx-drm/fixes now.

regards
Philipp