drm/fb_helper: Disable all crtc's when initial setup fails.

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commit 52dd06506e upstream.

Some drivers like i915 start with crtc's enabled, but with deferred
fbcon setup they were no longer disabled as part of fbdev setup.
Headless units could no longer enter pc3 state because the crtc was
still enabled.

Fix this by calling restore_fbdev_mode when we would have called
it otherwise once during initial fbdev setup.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: ca91a2758f ("drm/fb-helper: Support deferred setup")
Reported-by: Thomas Voegtle <tv@lio96.de>
Tested-by: Thomas Voegtle <tv@lio96.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20171128111603.62757-1-maarten.lankhorst@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Maarten Lankhorst 2017-11-28 12:16:03 +01:00 • committed by Greg Kroah-Hartman

parent e4c84b504e

commit dde499d3cf

1 changed files with 4 additions and 0 deletions

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drivers/gpu/drm/drm_fb_helper.c

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