* imx-drm: Color issues scanning out YUV420 frames through the overlay plane.
@ 2015-08-07 7:25 Javier Martin
2015-08-07 11:04 ` Javier Martin
0 siblings, 1 reply; 2+ messages in thread
From: Javier Martin @ 2015-08-07 7:25 UTC (permalink / raw)
To: linux-media
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: imx-drm: Color issues scanning out YUV420 frames through the overlay plane.
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
0 siblings, 0 replies; 2+ messages in thread
From: Javier Martin @ 2015-08-07 11:04 UTC (permalink / raw)
To: linux-media
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.
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2015-08-07 11:04 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
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 is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).