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authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-06-21 14:08:33 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-06-21 21:56:23 +0200
commita325725633c26aa66ab940f762a6b0778edf76c0 (patch)
tree0ef138846da01cda4e1a17bebd6dbb3e0a6ec3f7 /Documentation/gpu
parent46bfdf9a2e8e7067e5e452e0d668d98becd89dbc (diff)
downloadop-kernel-dev-a325725633c26aa66ab940f762a6b0778edf76c0.zip
op-kernel-dev-a325725633c26aa66ab940f762a6b0778edf76c0.tar.gz
drm: Lobotomize set_busid nonsense for !pci drivers
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 <gustavo.padovan@collabora.co.uk> Cc: Emil Velikov <emil.l.velikov@gmail.com> Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> (virt_gpu) Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-uapi.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
index 6da1e77..a1c6f010 100644
--- a/Documentation/gpu/drm-uapi.rst
+++ b/Documentation/gpu/drm-uapi.rst
@@ -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
+
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