* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 7:59 UTC (permalink / raw)
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https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #1 from Johannes Braun (jjo.braun@gmail.com) ---
Created attachment 288941
--> https://bugzilla.kernel.org/attachment.cgi?id=288941&action=edit
Kernel log with connected display
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 7:59 UTC (permalink / raw)
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https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #2 from Johannes Braun (jjo.braun@gmail.com) ---
Created attachment 288943
--> https://bugzilla.kernel.org/attachment.cgi?id=288943&action=edit
kernel config 5.4.28
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 8:01 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
Johannes Braun (jjo.braun@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #288939|lspci output of Lenovo 14w |5.4.28: lspci output of
description|notebook with stoney gpu |Lenovo 14w notebook with
| |stoney gpu
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 8:01 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
Johannes Braun (jjo.braun@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #288941|Kernel log with connected |5.4.28: Kernel log with
description|display |connected display
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 8:02 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
Johannes Braun (jjo.braun@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #288943|kernel config 5.4.28 |5.4.28: kernel config
description| |5.4.28
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 8:04 UTC (permalink / raw)
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https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #3 from Johannes Braun (jjo.braun@gmail.com) ---
Created attachment 288945
--> https://bugzilla.kernel.org/attachment.cgi?id=288945&action=edit
5.4.36: kernel config
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 8:04 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
Johannes Braun (jjo.braun@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #288943|5.4.28: kernel config |5.4.28: kernel config
description|5.4.28 |
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-06 8:05 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #4 from Johannes Braun (jjo.braun@gmail.com) ---
Created attachment 288947
--> https://bugzilla.kernel.org/attachment.cgi?id=288947&action=edit
5.4.36: lspci output of Lenovo 14w notebook with stoney gpu
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #5 from Johannes Braun (jjo.braun@gmail.com) ---
Created attachment 288949
--> https://bugzilla.kernel.org/attachment.cgi?id=288949&action=edit
5.4.36: Kernel log with connected display
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
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From: bugzilla-daemon @ 2020-05-08 15:57 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
Alex Deucher (alexdeucher@gmail.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |alexdeucher@gmail.com
--- Comment #6 from Alex Deucher (alexdeucher@gmail.com) ---
Are you trying to use more than two total displays (including the laptop
panel)? Stoney only has two display controllers so it can only driver a
maximum of two displays.
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-08 19:56 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #7 from Johannes Braun (jjo.braun@gmail.com) ---
Yes, the plan was to use three displays in total. I was not aware that this is
not possible with Stoney. Thank you for the clarification.
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-11 11:40 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #8 from Johannes Braun (jjo.braun@gmail.com) ---
Is there a way to ask the amdgpu driver how much displays are supported, e.g.
via a parameter in userspace?
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
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From: bugzilla-daemon @ 2020-05-11 12:45 UTC (permalink / raw)
To: dri-devel
https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #9 from Alex Deucher (alexdeucher@gmail.com) ---
You can ask any KMS driver via the drmModeGetResources() function call in
libdrm.
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* [Bug 207595] [amdgpu] Displayport MST not functional on AMD Stoney
2020-05-06 7:58 [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney bugzilla-daemon
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From: bugzilla-daemon @ 2020-05-11 12:48 UTC (permalink / raw)
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https://bugzilla.kernel.org/show_bug.cgi?id=207595
--- Comment #10 from Alex Deucher (alexdeucher@gmail.com) ---
If using X, you can also use `xrandr --verbose` to see number of crtcs.
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