[Bug 80029] New: [bisected] HDMI Errors on drm-next & Linus's tree

[Bug 80029] New: [bisected] HDMI Errors on drm-next & Linus's tree

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

          Priority: medium
            Bug ID: 80029
          Assignee: dri-devel@lists.freedesktop.org
           Summary: [bisected] HDMI Errors on drm-next & Linus's tree
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: mike@fireburn.co.uk
          Hardware: Other
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 101055
  --> https://bugs.freedesktop.org/attachment.cgi?id=101055&action=edit
Dmesg

I'm getting mode not supported on my TV which is connected to a kabini system

It bisects back to:

d0c94692e0a360828745a469bcf90b5c4f9273d0 is the first bad commit
commit d0c94692e0a360828745a469bcf90b5c4f9273d0
Author: Mario Kleiner <mario.kleiner.de@gmail.com>
Date:   Thu Mar 27 19:59:39 2014 +0100

    drm/edid: Parse and handle HDMI deep color modes.

    Check the HDMI cea block for deep color mode bits. If available,
    assign the highest supported bpc for a hdmi display, corresponding
    to the given deep color modes.

    Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

:040000 040000 42cc03b8d280ed165276b9be1c337d52773c4c35
674f7984e5278ae8dc7080344304093020274839 M      drivers
:040000 040000 cfec2deeddc3827f444ed391efa9c06d8dedb846
50f255ca6a41a02eb039c9eb9a469f762c34df39 M      include


I'm attaching my dmesg of the errors I see - the EDID ones only appear once I
switch the TV / AV receiver off and on

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

Mike Lothian <mike@fireburn.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mike@fireburn.co.uk

--- Comment #1 from Mike Lothian <mike@fireburn.co.uk> ---
Should probably make clear this works fine on 3.15

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #2 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
Hi,

does it work with some video modes, or none of them?

Can you give me the edid of your hdmi display? Either "xrandr --verbose" output
or the Xorg log?

And the syslog when booting with drm.debug=1 at the kernel command line. I
think "cat /var/log/syslog | grep drm" for the lines which contain "drm" would
be enough.

These EDID errors also happened before, right?

thanks,
-mario

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #3 from Mike Lothian <mike@fireburn.co.uk> ---
Hi Mario

I'm not sure about other video modes - I always use the native 1080p @ 60Hz I'm
not sure how to change it either when I can't see the screen

I've attached the verbose xrandr output for you from a working kernel

Would you like the debugging put on a working or broken kernel?

I don't remember ever seeing any EDID issues except when the receiver was on
but the TV was off

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #4 from Mike Lothian <mike@fireburn.co.uk> ---
Created attachment 101060
  --> https://bugs.freedesktop.org/attachment.cgi?id=101060&action=edit
Xrandr --verbose

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #5 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
(In reply to comment #3)
> Hi Mario
> 
> I'm not sure about other video modes - I always use the native 1080p @ 60Hz
> I'm not sure how to change it either when I can't see the screen
> 
> I've attached the verbose xrandr output for you from a working kernel
> 

Thanks. The edid looks ok and spec conformant. If the edid doesn't lie about
your device, we should be able to drive your tv with a 12 bit deep color mode
at full resolution without problems.

> Would you like the debugging put on a working or broken kernel?

On the 3.16 kernel.

> 
> I don't remember ever seeing any EDID issues except when the receiver was on
> but the TV was off

Hm. Can you explain your setup? The TV isn't connected directly to the graphics
card, but there's some 3rd party receiver inbetween? Can you give me the
name/model of the receiver and TV?

The hdmi deep color code has been successfully tested on different panels with
dce-4 and dce-6 graphics cards, but not with the latest dce-8 kabini's. This
could be something missing in the driver specific to dce-8, or your tv
misrepresenting its capabilities.

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #6 from Mike Lothian <mike@fireburn.co.uk> ---
All my devices - PS3, PC, Sky box and OUYA all connect ito the AV Receiver
(YAMAHA YHT-199
http://uk.yamaha.com/en/products/audio-visual/hometheater-systems/home-theater-package/yht-199_w/?mode=model)

That then connects to the TV - I'm pretty sure that's a fairly standard setup

I'll try the debugging for you now

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #7 from Mike Lothian <mike@fireburn.co.uk> ---
Created attachment 101105
  --> https://bugs.freedesktop.org/attachment.cgi?id=101105&action=edit
DRM logging

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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[-- Attachment #1.1: Type: text/plain, Size: 692 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=80029

Mike Lothian <mike@fireburn.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #101055|0                           |1
        is obsolete|                            |

--- Comment #8 from Mike Lothian <mike@fireburn.co.uk> ---
Created attachment 101106
  --> https://bugs.freedesktop.org/attachment.cgi?id=101106&action=edit
Full Dmesg

Full dmesg. I switched the receiver off and on then then TV off and on - just
incase it highlights anything strange

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #9 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
Can you try a reboot? Most of the interesting action seems to happen before
your syslog starts.

If you look at the onscreen display of your tv or receiver, the sections about
input signal or output signal, does it say anything about hdmi or deep color
etc.?

Another good thing to try would be directly connecting the tv to the computer's
hdmi out, to see what syslog and xrandr --verbose output then have to say.

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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[-- Attachment #1.1: Type: text/plain, Size: 607 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=80029

Mike Lothian <mike@fireburn.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #101106|0                           |1
        is obsolete|                            |

--- Comment #10 from Mike Lothian <mike@fireburn.co.uk> ---
Created attachment 101108
  --> https://bugs.freedesktop.org/attachment.cgi?id=101108&action=edit
Full Dmesg

Using journalctl -b this time

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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[-- Attachment #1.1: Type: text/plain, Size: 608 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=80029

Mike Lothian <mike@fireburn.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #101105|0                           |1
        is obsolete|                            |

--- Comment #11 from Mike Lothian <mike@fireburn.co.uk> ---
Created attachment 101109
  --> https://bugs.freedesktop.org/attachment.cgi?id=101109&action=edit
DRM debug

Grepping drm from journalctl -b

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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[-- Attachment #1.1: Type: text/plain, Size: 833 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=80029

Mike Lothian <mike@fireburn.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #101060|0                           |1
        is obsolete|                            |

--- Comment #12 from Mike Lothian <mike@fireburn.co.uk> ---
Created attachment 101110
  --> https://bugs.freedesktop.org/attachment.cgi?id=101110&action=edit
Xrandr --verbose

This is the xrandr --verbose output

All the logs are with the TV directly connected to the computer now

The TV is a Samsung LE40M87BD and accoring to
http://www.trustedreviews.com/Samsung-LE40M87BD-40in-LCD-TV_TV_review it does
support Deep Colour

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #13 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
Created attachment 101115
  --> https://bugs.freedesktop.org/attachment.cgi?id=101115&action=edit
Use dce5/6 hdmi deep color clock setup also on dce8+

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #14 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
Ok, there's nothing suspicious in your edid's or syslog output, everything
seems to work according to plan.

Assuming your equipment is working correctly, this leaves dce8 specific setup
as suspect. Alex used some special case code for dce5 and dce6, but excluded
dce8 from that special case. However we haven't ever tested dce8 + deep color,
so maybe it needs that special case as well.

Can you apply and try the patch i just attached? This is a pure guess, but
maybe it helps.

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--- Comment #15 from Mike Lothian <mike@fireburn.co.uk> ---
That indeed seems to have done the trick

Is there a way to check that it's now using 36bit colour?

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #16 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
(In reply to comment #15)
> That indeed seems to have done the trick

Good. Can you test some sound output to your tv, to check if sound sounds
properly and not somehow distorted?

> 
> Is there a way to check that it's now using 36bit colour?

The fact that you get a functional display means it is using it. Before this
patch the gpu was signalling to your tv that it sends a dc36 signal, but it
wasn't sending a valid signal, so your tv couldn't decode properly. Now it
does.

Maybe there's also some deep color or 12 bpc indication in the onscreen display
somewhere?

A different question would be if the tv does something useful with the extra
bits, or just throws them away.

At the moment the patches would only affect the precision of the hardware gamma
tables, allowing to use their full output precision of 10 bits to get 2 extra
bits for gamma correction, so maybe color/gamma correction would produce a bit
less banding in some smooth color gradients. Our patches to enable a full 10
bit framebuffer didn't make it into drm-next or Linus tree so far, the pull
request is still pending, so i guess they won't make it into 3.16. And
userspace also needs work to enable full 10 bits, we have working patches but
they are not yet upstreamed.

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--- Comment #17 from Mike Lothian <mike@fireburn.co.uk> ---
After remembering to copy hdmi-extra.conf to default.conf in
/usr/share/pulseaudio/alsa-mixer/profile-sets/ (I think that's a known bug) my
5.1 surround worked just fine

I noticed this in the logs after playing Big Buck Bunny
(big_buck_bunny_1080p_surround.avi)

[  1043.140] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 62525 < target_msc 62526
[  1153.407] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 69140 < target_msc 69141
[  1162.907] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 69709 < target_msc 69710
[  1237.257] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 74170 < target_msc 74171
[  1241.357] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 74415 < target_msc 74416
[  1241.407] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 74418 < target_msc 74419
[  1241.941] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 74450 < target_msc 74451
[  1253.324] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 75131 < target_msc 75132
[  1261.408] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 75615 < target_msc 75616
[  1261.595] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 75625 < target_msc 75626
[  1266.474] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 75918 < target_msc 75919
[  1286.541] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 77121 < target_msc 77122
[  1287.691] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 77190 < target_msc 77191
[  1288.441] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 77235 < target_msc 77236
[  1292.691] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 77490 < target_msc 77491
[  2152.825] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
completion event has impossible msc 129098 < target_msc 129099

I'm guessing this is unrelated though

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #18 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> ---
(In reply to comment #17)
> After remembering to copy hdmi-extra.conf to default.conf in
> /usr/share/pulseaudio/alsa-mixer/profile-sets/ (I think that's a known bug)
> my 5.1 surround worked just fine
> 

Pheew! I'm relieved :). We'll have to check if this patch is the proper fix for
all dce-8 or only a special case for kabini's dce-8.3. Maybe we should leave
the bug open until the final patch is decided upon and tested.

Thanks for the testing so far!

> I noticed this in the logs after playing Big Buck Bunny
> (big_buck_bunny_1080p_surround.avi)
> 
> [  1043.140] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 62525 < target_msc 62526
> [  1153.407] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 69140 < target_msc 69141
> [  1162.907] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 69709 < target_msc 69710
> [  1237.257] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 74170 < target_msc 74171
> [  1241.357] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 74415 < target_msc 74416
> [  1241.407] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 74418 < target_msc 74419
> [  1241.941] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 74450 < target_msc 74451
> [  1253.324] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 75131 < target_msc 75132
> [  1261.408] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 75615 < target_msc 75616
> [  1261.595] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 75625 < target_msc 75626
> [  1266.474] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 75918 < target_msc 75919
> [  1286.541] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 77121 < target_msc 77122
> [  1287.691] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 77190 < target_msc 77191
> [  1288.441] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 77235 < target_msc 77236
> [  1292.691] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 77490 < target_msc 77491
> [  2152.825] (WW) RADEON(0): radeon_dri2_flip_event_handler: Pageflip
> completion event has impossible msc 129098 < target_msc 129099
> 
> I'm guessing this is unrelated though

Yep, unrelated. This is another new bug introduced into kms-pageflip handling
for 3.16. I'll look into this tomorrow, as i have suitable test hardware.

-mario

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

--- Comment #19 from Alex Deucher <agd5f@yahoo.com> ---
I've added the fix to my drm-fixes tree.  It is correct.

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[Bug 80029] [bisected] HDMI Errors on drm-next & Linus's tree

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https://bugs.freedesktop.org/show_bug.cgi?id=80029

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #20 from Alex Deucher <agd5f@yahoo.com> ---
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c868229da7014fc988a8d506264c43c1fcf7f21

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