<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - WARNING: CPU: 1 PID: 16615 at drivers/gpu/drm/drm_debugfs_crc.c:185 crtc_crc_open+0x1d0/0x1f0 [drm]" href="https://bugs.freedesktop.org/show_bug.cgi?id=100610#c2">Comment # 2</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - WARNING: CPU: 1 PID: 16615 at drivers/gpu/drm/drm_debugfs_crc.c:185 crtc_crc_open+0x1d0/0x1f0 [drm]" href="https://bugs.freedesktop.org/show_bug.cgi?id=100610">bug 100610</a> from <a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> Chris Wilson</a> <pre>Introduced by commit e8fa5671183c80342d520ad81d14fa79a9d4a680 Author: Tomeu Vizoso <<a href="mailto:tomeu.vizoso@collabora.com">tomeu.vizoso@collabora.com</a>> Date: Mon Jan 2 13:59:10 2017 +0100 drm: crc: Wait for a frame before returning from open() Don't return from the open() call on the crc/data file until the HW has produced a first frame, as there's great variability in when the HW is able to do that and userspace shouldn't have to guess when this specific HW is ready to start giving frame CRCs. Signed-off-by: Tomeu Vizoso <<a href="mailto:tomeu.vizoso@collabora.com">tomeu.vizoso@collabora.com</a>> Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>> Link: <a href="http://patchwork.freedesktop.org/patch/msgid/20170102125912.22305-3-tomeu.vizoso@collabora.com">http://patchwork.freedesktop.org/patch/msgid/20170102125912.22305-3-tomeu.vizoso@collabora.com</a></pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>