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drm: Lobotomize set_busid nonsense for !pci drivers

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We already have a fallback in place to fill out the unique from
dev->unique, which is set to something reasonable in drm_dev_alloc.

Which means we only need to have a special set_busid for pci devices,
to be able to care the backwards compat code for drm 1.1 around, which
libdrm still needs.

While developing and testing this patch things blew up in really
interesting ways, and the code is rather confusing in naming things
between the kernel code, ioctl #defines and libdrm. For the next brave
dragon slayer, document all this madness properly in the userspace
interface section of gpu.tmpl.

v2: Make drm_dev_set_unique static and update kerneldoc.

v3: Entire rewrite, plus document what's going on for posterity in the
gpu docbook uapi section.

v4: Drop accidental amdgpu hunk (Emil).

v5: Drop accidental omapdrm vblank counter change (Emil).

v6: Rebase on top of the sphinx conversion.

Cc: Gustavo Padovan <[email protected]>
Cc: Emil Velikov <[email protected]>
Tested-by: Gustavo Padovan <[email protected]> (virt_gpu)
Reviewed-by: Emil Velikov <[email protected]>
Signed-off-by: Daniel Vetter <[email protected]>
This commit is contained in:
Daniel Vetter 2016-06-21 14:08:33 +02:00
commit a325725633
17 changed files with 64 additions and 41 deletions
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6
Documentation/gpu/drm-uapi.rst
View file

@ -14,6 +14,12 @@ management, and output management.
Cover generic ioctls and sysfs layout here. We only need high-level
info, since man pages should cover the rest.
libdrm Device Lookup
====================
.. kernel-doc:: drivers/gpu/drm/drm_ioctl.c
:doc: getunique and setversion story
Render nodes
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