From: Javier Martin <javiermartin@by.com.es>
To: dri-devel@lists.freedesktop.org
Subject: imx-drm: Color issues scanning out YUV420 frames through the overlay plane.
Date: Fri, 07 Aug 2015 13:05:14 +0200 [thread overview]
Message-ID: <55C490EA.4060700@by.com.es> (raw)
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.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel
reply other threads:[~2015-08-07 11:15 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=55C490EA.4060700@by.com.es \
--to=javiermartin@by.com.es \
--cc=dri-devel@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox