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0472a605e0
Despite all the careful planning of the kernel, a link may become insufficient to handle the currently-set mode. At this point, the kernel should mark this particular configuration as being broken and potentially prune the mode before setting the offending connector's link-status to BAD and send the userspace a hotplug event. This may happen right after a modeset or later on. Upon receiving a hot-plug event, we iterate through the connectors to re-apply the currently-set mode on all the connectors that have a link-status property set to BAD. The kernel may be able to get the link to work by dropping to using a lower link bpp (with the same display bpp). However, the modeset may fail if the kernel has pruned the mode, so to make users aware of this problem a warning is outputed in the logs to warn about having a potentially-black display. This patch does not modify the current behaviour of always propagating the events to the randr clients. This allows desktop environments to re-probe the connectors and select a new resolution based on the new (currated) mode list if a mode disapeared. This behaviour is expected in order to pass the Display Port compliance tests. (Ported from xserver commit bcee1b76aa0db8525b491485e90b8740763d7de6) [ Michel: Bump libdrm dependency to >= 2.4.78 for DRM_MODE_LINK_STATUS_BAD ] Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
xf86-video-ati - ATI/AMD Radeon video driver for the Xorg X server
Patches and questions regarding this software should be directed at the
amd-gfx mailing list:
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Driver/Radeon
The master development code repository can be found at:
git://anongit.freedesktop.org/git/xorg/driver/xf86-video-ati
https://cgit.freedesktop.org/xorg/driver/xf86-video-ati
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
For more information on the git code manager, see:
https://wiki.x.org/wiki/GitPage