From: Javier Martin <javiermartin@by.com.es>
To: linux-media <linux-media@vger.kernel.org>
Subject: Re: imx-drm: Color issues scanning out YUV420 frames through the overlay plane.
Date: Fri, 07 Aug 2015 13:04:13 +0200 [thread overview]
Message-ID: <55C490AD.1010904@by.com.es> (raw)
In-Reply-To: <55C45D72.1030204@by.com.es>
Sorry for sending this to the wrong list.
On 07/08/15 09:25, Javier Martin wrote:
> Hi,
> I am using mainline kernel 4.1 and I was writing a small application
> that uses double buffering to read YUV420 frames from a file at 30fps
> and displays them using the overlay plane in the imx-drm driver.
>
> The first issue I noticed is that the image was green so I had to apply
> the following patches to make the U and V components be scanned out
> properly:
>
> http://lists.freedesktop.org/archives/dri-devel/2014-October/071052.html
> http://lists.freedesktop.org/archives/dri-devel/2014-October/071025.html
> http://lists.freedesktop.org/archives/dri-devel/2014-October/071048.html
>
> The thing is that, even after applying the 3 patches above, colors are a
> bit strange. They seem about right but there are some artifacts, like a
> saturation effect that spoils the image. You can see some snapshots here
> to see what I am talking about:
> https://imageshack.com/i/f0nAM5Xbj
> https://imageshack.com/i/hl7bZMNjj
> https://imageshack.com/i/eyRjURxRj
>
> And the original video is the first one in this page:
> http://media.xiph.org/video/derf/
>
> On the other hand, colors in the primary plane using the fbdev interface
> and RGB look correct.
>
> Has anyone seen something similar or is YUV420 working fine for you?
>
> Regards,
> Javier.
> --
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prev parent reply other threads:[~2015-08-07 11:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-07 7:25 imx-drm: Color issues scanning out YUV420 frames through the overlay plane Javier Martin
2015-08-07 11:04 ` Javier Martin [this message]
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