[Bug 41366] New: HDMI on a Fusion board only comes up when LVDS is already enabled

[Bug 41366] New: HDMI on a Fusion board only comes up when LVDS is already enabled

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41366

           Summary: HDMI on a Fusion board only comes up when LVDS is
                    already enabled
           Product: DRI
           Version: XOrg CVS
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: simon.farnsworth@onelan.co.uk


I'm running airlied's drm-fixes, git revision
fdfc61594e6de21c23f955818ef78bcab9bafe40, and experiencing "interesting" times
trying to get HDMI to work on a Fusion GPU (detected by X as [    49.876] (--)
RADEON(0): Chipset: "AMD Radeon HD 6310 Graphics" (ChipID = 0x9802)).

If I run:
xrandr --output HDMI-0 --off
xrandr --output LVDS --auto
xrandr --output HDMI-0 --mode 1920x1200

the HDMI monitor comes up at 1920x1200

If I run:
xrandr --output HDMI-0 --off
xrandr --output LVDS --off
xrandr --output HDMI-0 --mode 1920x1200

the HDMI monitor immediately enters DPMS Off state, and stays there.

I've confirmed with "grep . /sys/class/drm/card0-HDMI-A-1/*" that the kernel
thinks the HDMI connector is switched on. The only difference I can see is that
HDMI works when it gets CRTC 1, but not when it gets CRTC 0.

I have captured logs from the kernel with drm.debug=0x6 during the runs, in
case that explains what's going on; I will attach them to this bug.

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[Bug 41366] HDMI on a Fusion board only comes up when LVDS is already enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=41366

--- Comment #1 from Simon Farnsworth <simon.farnsworth@onelan.co.uk> 2011-09-30 10:13:00 PDT ---
Created an attachment (id=51804)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=51804)
dmesg showing the modeset that results in HDMI being off unexpectedly

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[Bug 41366] HDMI on a Fusion board only comes up when LVDS is already enabled

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41366

--- Comment #2 from Simon Farnsworth <simon.farnsworth@onelan.co.uk> 2011-09-30 10:13:24 PDT ---
Created an attachment (id=51805)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=51805)
dmesg showing the modeset that results in HDMI working

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[Bug 41366] [r600 KMS] HDMI on a Fusion board only comes up when LVDS is already enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=41366

Simon Farnsworth <simon.farnsworth@onelan.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|HDMI on a Fusion board only |[r600 KMS] HDMI on a Fusion
                   |comes up when LVDS is       |board only comes up when
                   |already enabled             |LVDS is already enabled

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[Bug 41366] [r600 KMS] HDMI on a Fusion board only comes up when LVDS is already enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=41366

--- Comment #3 from Alex Deucher <agd5f@yahoo.com> 2011-10-05 15:08:22 PDT ---
Strange, everything looks correct.  I'll dig into it.  Manually specifying the
crtc seems to work, e.g.,

xrandr --output HDMI-0 --mode 1920x1200 --crtc 1
xrandr --output HDMI-0 --mode 1920x1200 --crtc 0

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[Bug 41366] [r600 KMS] HDMI on a Fusion board only comes up when LVDS is already enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=41366

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> 2011-10-05 15:35:55 PDT ---
Created an attachment (id=52024)
 View: https://bugs.freedesktop.org/attachment.cgi?id=52024
 Review: https://bugs.freedesktop.org/review?bug=41366&attachment=52024

use hardcoded dig encoder to transmitter mapping

This patch fixes the issue for me.

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[Bug 41366] [r600 KMS] HDMI on a Fusion board only comes up when LVDS is already enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=41366

--- Comment #5 from Simon Farnsworth <simon.farnsworth@onelan.co.uk> 2011-10-06 03:10:23 PDT ---
Tested the patch - it works for me.

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[Bug 41366] [r600 KMS] HDMI on a Fusion board only comes up when LVDS is already enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=41366

--- Comment #6 from Florian Mickler <florian@mickler.org> 2012-01-12 14:46:12 PST ---
A patch referencing this bug report has been merged in Linux v3.1-rc10:

commit cb7cf41961fe10773c491c75ae73539ad4bbed66
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Wed Oct 5 18:36:50 2011 -0400

    drm/radeon/kms: use hardcoded dig encoder to transmitter mapping for DCE4.1

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[Bug 41366] [r600 KMS] HDMI on a Fusion board only comes up when LVDS is already enabled

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https://bugs.freedesktop.org/show_bug.cgi?id=41366

Martin Peres <martin.peres@free.fr> changed:

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

--- Comment #7 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/213.

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