[Bug 41561] New: Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[Bug 41561] New: Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

           Summary: Hotplug detect does not work for HDMI monitor on
                    Fusion E-350 board
           Product: DRI
           Version: unspecified
          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


Using airlied-drm-fixes kernel as of commit
6777a4f6898a53974ef7fe7ce09ec41fae0f32db with Alex Deucher's patch
"drm/radeon/kms: use hardcoded dig encoder to transmitter mapping for DCE4.1"
on top, I'm not seeing uevents from the kernel when I plug and unplug a HDMI
monitor.

dmesg with drm.debug=0xf shows me the following when I connect a monitor:

# dmesg -c
[15202.939581] [drm:evergreen_irq_process], r600_irq_process start: rptr 5872,
wptr 5888
[15202.939609] [drm:evergreen_irq_process], IH: HPD2
[15203.050597] [drm:radeon_atombios_connected_scratch_regs], DFP1 connected
[15203.050605] [drm:output_poll_execute], [CONNECTOR:15:HDMI-A-1] status
updated from 1 to 1
[15203.052661] [drm:output_poll_execute], [CONNECTOR:17:VGA-1] status updated
from 2 to 2

radeonreg suggests that the HPD sense bit is correctly set

# ./radeonreg regs all | grep 00006028 # DC_HPD2_INT_STATUS
00006028        ff0ff012 (-15732718)

When I remove the monitor, I get the following from dmesg and radeonreg:

# dmesg -c
[15307.075271] [drm:evergreen_irq_process], r600_irq_process start: rptr 5888,
wptr 5904
[15307.075300] [drm:evergreen_irq_process], IH: HPD2
[15307.131727] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid,
remainder is 192
[15307.131733] Raw EDID:
[15307.131738]          3f ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.131742]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.131745]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.131749]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.131752]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.131756]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.131759]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.131763]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[15307.141965] [drm:radeon_dvi_detect] *ERROR* HDMI-A-1: probed a monitor but
no|invalid EDID
[15307.141975] [drm:radeon_atombios_connected_scratch_regs], DFP1 connected
[15307.141981] [drm:output_poll_execute], [CONNECTOR:15:HDMI-A-1] status
updated from 1 to 1
[15307.144028] [drm:output_poll_execute], [CONNECTOR:17:VGA-1] status updated
from 2 to 2

# ./radeonreg regs all | grep 00006028 # DC_HPD2_INT_STATUS
00006028        ff0ff000 (-15732736)

suggesting that HPD sense bits are being updated correctly by the hardware, but
that this isn't resulting in uevents following through.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Hotplug detect does not     |[r600 KMS] Hotplug detect
                   |work for HDMI monitor on    |does not work for HDMI
                   |Fusion E-350 board          |monitor on Fusion E-350
                   |                            |board

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #1 from Alex Deucher <agd5f@yahoo.com> 2011-10-07 08:59:22 PDT ---
If you are getting HPD interrupts, radeon_hotplug_work_func() should be getting
scheduled.  From there drm_helper_hpd_irq_event() gets called which actually
generates the uevent.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #2 from Simon Farnsworth <simon.farnsworth@onelan.co.uk> 2011-10-07 09:07:40 PDT ---
drm_helper_hpd_irq_event() isn't generating uevents, because connector->status
is not being updated somewhere, and is remaining at connector_status_connected,
when it should be being updated to connector_status_disconnected.

If I do cat /sys/class/drm/card0-HDMI-A-1/status, I see the status is
"disconnected", but something resets it by the time the helper comes back
round. Possibly connected to the following from dmesg:

# cat /sys/class/drm/card0-HDMI-A-1/status ; dmesg -c
[16791.042128] [drm:radeon_atombios_connected_scratch_regs], DFP1 disconnected

# sleep 10 ; dmesg -c
[16799.522394] [drm:radeon_atombios_connected_scratch_regs], DFP1 connected
[16799.522407] [drm:output_poll_execute], [CONNECTOR:15:HDMI-A-1] status
updated from 1 to 1
[16799.524465] [drm:output_poll_execute], [CONNECTOR:17:VGA-1] status updated
from 2 to 2

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #3 from Simon Farnsworth <simon.farnsworth@onelan.co.uk> 2011-10-07 09:26:08 PDT ---
So, I think I see the proximate cause of the bug, but not the reason for it:

In radeon_dvi_detect at radeon_connectors.c:962, I see:

    if (!force) {
        ret = connector->status;
        goto out;
    }

A HPD interrupt causes output_poll_execute at drm_crtc_helper.c:897 to execute 
       connector->status = connector->funcs->detect(connector, false); as a
result, I cannot see how a hotplug interrupt will ever result in a connector
state changing.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #4 from Alex Deucher <agd5f@yahoo.com> 2011-10-07 10:35:06 PDT ---
Created an attachment (id=52093)
 View: https://bugs.freedesktop.org/attachment.cgi?id=52093
 Review: https://bugs.freedesktop.org/review?bug=41561&attachment=52093

1/2: fix the digital only cases

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #5 from Alex Deucher <agd5f@yahoo.com> 2011-10-07 10:35:43 PDT ---
Created an attachment (id=52094)
 View: https://bugs.freedesktop.org/attachment.cgi?id=52094
 Review: https://bugs.freedesktop.org/review?bug=41561&attachment=52094

2/2: fix the mixed and analog cases

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #6 from Simon Farnsworth <simon.farnsworth@onelan.co.uk> 2011-10-07 10:53:04 PDT ---
I've applied both patches, and am testing on a machine with DVI-I and
DisplayPort.

Test sequence:

1) Boot system with no outputs connected.
2) Attach a DVI-D monitor, then remove it.
3) Attach a DVI-A to VGA adapter that has no load, then remove it.
4) Attach a DVI-A to VGA adapter that has load but no DDC, then remove it.
5) Attach a DVI-A to VGA adapter that has load and DDC, then remove it.
6) Repeat steps 2 to 5, watching for uevents.

Note that the DVI-A to VGA adapter asserts HPD when connected.

Results:

DVI-D hotplug works fine. There is a delay on the first DVI-D hotplug after the
connector has been used for VGA, but I get an event within 10 seconds.

No events when I plug in the adapter with no load and wait 20 seconds.

No events when I plug in the adapter with load but not DDC and wait 20 seconds.

Events on connect only when I plug in the adapter with DDC.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |qjn@gmx.de

--- Comment #7 from Alex Deucher <agd5f@yahoo.com> 2011-10-07 11:14:49 PDT ---
*** Bug 40252 has been marked as a duplicate of this bug. ***

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #8 from Alex Deucher <agd5f@yahoo.com> 2011-10-07 11:16:14 PDT ---
(In reply to comment #6)
> Results:
> 
> DVI-D hotplug works fine. There is a delay on the first DVI-D hotplug after the
> connector has been used for VGA, but I get an event within 10 seconds.

good.

> 
> No events when I plug in the adapter with no load and wait 20 seconds.
> 

As expected.

> No events when I plug in the adapter with load but not DDC and wait 20 seconds.
> 

There's no way to get events for this case without doing load detection in the
hotplug polling.  We don't currently support that case as load detection has
the potential to cause flicker on connectors that share resources.  If you need
it, you can remove the !force checks in the connector detect functions, but you
may get flicker on other connectors if they share resources.

> Events on connect only when I plug in the adapter with DDC.

As expected.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #9 from Florian Mickler <florian@mickler.org> 2012-01-12 14:19:31 PST ---
A patch referencing this bug report has been merged in Linux v3.2-rc1:

commit d0d0a225e6ad43314c9aa7ea081f76adc5098ad4
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Fri Oct 7 14:23:48 2011 -0400

    drm/radeon/kms: handle !force case in connector detect more gracefully

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #10 from Florian Mickler <florian@mickler.org> 2012-01-21 08:46:25 PST ---
A patch referencing this bug report has been merged in Linux v3.2-rc1:

commit 5f0a26128d66ef81613fe923d5c288942844ccdc
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Fri Oct 7 14:23:47 2011 -0400

    drm/radeon/kms: bail early in dvi_detect for digital only connectors

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

--- Comment #11 from Florian Mickler <florian@mickler.org> 2012-01-21 13:23:51 PST ---
A patch referencing a commit referencing this bug report has been merged in
Linux v3.2-rc1:

commit 340764465aa4a586ca332e61ae64883e5ad6f183
Author: Jerome Glisse <jglisse@redhat.com>
Date:   Mon Oct 24 18:16:34 2011 -0400

    drm/radeon: avoid bouncing connector status btw disconnected & unknown

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.

[Bug 41561] [r600 KMS] Hotplug detect does not work for HDMI monitor on Fusion E-350 board

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 805 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=41561

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

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

--- Comment #12 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/218.

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

[-- Attachment #1.2: Type: text/html, Size: 2455 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