From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org Subject: [Bug 76483] New: [NV50, bisected, RFC patch] xset dpms force {on, off} does not work over DP Date: Sat, 22 Mar 2014 17:17:25 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0344870039==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Sender: "Nouveau" To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org --===============0344870039== Content-Type: multipart/alternative; boundary="1395508646.dc6dA11.18167"; charset="us-ascii" --1395508646.dc6dA11.18167 Date: Sat, 22 Mar 2014 17:17:26 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=76483 Priority: medium Bug ID: 76483 Assignee: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Summary: [NV50, bisected, RFC patch] xset dpms force {on,off} does not work over DP QA Contact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org Severity: major Classification: Unclassified OS: Linux (All) Reporter: dd-IPhqJjDoDR/z1n+OaKNE4w@public.gmane.org Hardware: x86-64 (AMD64) Status: NEW Version: git Component: Driver/nouveau Product: xorg Created attachment 96206 --> https://bugs.freedesktop.org/attachment.cgi?id=96206&action=edit RFC patch on top of 34d59508 (drm/nouveau: fix TTM_PL_TT memtype on pre-nv50) Commit 0a0afd28 (drm/nv50-/disp: move DP link training to core and train from supervisor) removed a call to 'nouveau_dp_dpms' at the bottom of nv50_display.c. Without this call, 'xset dpms force {on,off}' does not have any effect on my DP-attached monitor. The attached proof-of-concept patch re-adds the call, as well as a partial version of nouveau_dp_dpms which causes 'force off' to work again. It is not clear to me how to trigger link training in the supervisor, so nouveau_dp_dpms skips that step when handling DRM_MODE_DPMS_ON. The result is that 'force on' does not cause the monitor to wake up, and the connection is effectively dead. Could somebody familiar with the driver could comment on the next steps to undertake to restore the full {on,off} functionality? -- You are receiving this mail because: You are the assignee for the bug. --1395508646.dc6dA11.18167 Date: Sat, 22 Mar 2014 17:17:26 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"
Priority medium
Bug ID 76483
Assignee nouveau@lists.freedesktop.org
Summary [NV50, bisected, RFC patch] xset dpms force {on,off} does not work over DP
QA Contact xorg-team@lists.x.org
Severity major
Classification Unclassified
OS Linux (All)
Reporter dd@crosstwine.com
Hardware x86-64 (AMD64)
Status NEW
Version git
Component Driver/nouveau
Product xorg 

Created attachment 96206 [details] [review]
RFC patch on top of 34d59508 (drm/nouveau: fix TTM_PL_TT memtype on pre-nv50)

Commit 0a0afd28 (drm/nv50-/disp: move DP link training to core and
train from supervisor) removed a call to 'nouveau_dp_dpms' at the
bottom of nv50_display.c.

Without this call, 'xset dpms force {on,off}' does not have any effect
on my DP-attached monitor.

The attached proof-of-concept patch re-adds the call, as well as a partial
version of nouveau_dp_dpms which causes 'force off' to work again.

It is not clear to me how to trigger link training in the supervisor,
so nouveau_dp_dpms skips that step when handling DRM_MODE_DPMS_ON.
The result is that 'force on' does not cause the monitor to wake up,
and the connection is effectively dead.

Could somebody familiar with the driver could comment on the next
steps to undertake to restore the full {on,off} functionality?

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