All of lore.kernel.org
 help / color / mirror / Atom feed
From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 110423] Forced EDID is ignored
Date: Sun, 14 Apr 2019 20:15:55 +0000	[thread overview]
Message-ID: <bug-110423-502@http.bugs.freedesktop.org/> (raw)


[-- Attachment #1.1: Type: text/plain, Size: 1743 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=110423

            Bug ID: 110423
           Summary: Forced EDID is ignored
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: Heiko.Lechner@ruhr-uni-bochum.de

Created attachment 143968
  --> https://bugs.freedesktop.org/attachment.cgi?id=143968&action=edit
output from edid-decode from hacked EDID file

I have a tv that does not handle YCbCr properly but advertises it in his EDID.
So I have to force Full RGB over HDMI because it seems that my RX 570 uses
YCbCr by default (maybe because of the HDMI connection?).
There is no switch to force Full RGB so I downloaded the EDID with get-edid
using i2c and hacked it to disable the advertisement of YcbCr. I copied it to
the initrd and force loaded it via drm.edid_firmware=edid/PhilipsFTV.bin.
It works:
[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.0.0-trunk-amd64
root=UUID=1c91ef55-0cf6-4694-bd2a-29aeb6492b3b ro
drm.edid_firmware=edid/PhilipsFTV.bin
[    0.849967] platform HDMI-A-1: firmware: direct-loading firmware
edid/PhilipsFTV.bin
[    0.850055] [drm] Got external EDID base block and 1 extension from
"edid/PhilipsFTV.bin" for connector "HDMI-A-1"

But the problems with my tv persist. So I think that the forced EDID is ignored
by AMDGPU.

uname -a:
Linux Heimkino-PC 5.0.0-trunk-amd64 #1 SMP Debian 5.0.7-1~exp1 (2019-03-22)
x86_64 GNU/Linux

-- 
You are receiving this mail because:
You are the assignee for the bug.

[-- Attachment #1.2: Type: text/html, Size: 3215 bytes --]

[-- Attachment #2: Type: text/plain, Size: 159 bytes --]

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

             reply	other threads:[~2019-04-14 20:15 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-14 20:15 bugzilla-daemon [this message]
2019-04-14 20:25 ` [Bug 110423] Forced EDID is ignored bugzilla-daemon
2019-11-19  9:19 ` bugzilla-daemon

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=bug-110423-502@http.bugs.freedesktop.org/ \
    --to=bugzilla-daemon@freedesktop.org \
    --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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.