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SubjectDRM modesetting & sysfs
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[Sorry for the DUP, forgot to cc lkml]

I just pushed a few changes updating the DRM modesetting sysfs support, both
for debugging and eventual HAL friendliness.

So far, the support is limited to describing outputs and generating hotplug
events. A typical "card0" directory now looks like this:

.
|-- card0-DAC-1
| |-- device -> ../../../../../../devices/pci0000:00/0000:00:02.0/drm/card0
| |-- dpms
| |-- edid
| |-- modes
| |-- power
| | `-- wakeup
| |-- status
| |-- subsystem -> ../../../../../../class/drm
| `-- uevent
|-- card0-LVDS-1
| |-- device -> ../../../../../../devices/pci0000:00/0000:00:02.0/drm/card0
| |-- dpms
| |-- edid
| |-- modes
| |-- power
| | `-- wakeup
| |-- status
| |-- subsystem -> ../../../../../../class/drm
| `-- uevent
|-- dev
|-- device -> ../../../../../devices/pci0000:00/0000:00:02.0
|-- dri_library_name
|-- power
| `-- wakeup
|-- subsystem -> ../../../../../class/drm
`-- uevent

Each output is listed, prefixed with its associated card number to
disambiguate it at the top level /sys/class/drm directory (where it also has
some symlinks). Currently, only DPMS, EDID, mode list and connection status
properties are exported, but we could list more as needed. You can
use 'udevmonitor --env' to look for hotplug events; you should see several at
load time, and presumably some at connection hotplug time (though I haven't
gotten that working yet, any ideas Jakob?).

Any thoughts on the interface? Anything in particular people would like to
see?

Thanks,
Jesse


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