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authorNoralf Trønnes <noralf@tronnes.org>2018-07-03 18:03:47 +0200
committerNoralf Trønnes <noralf@tronnes.org>2018-07-10 14:51:37 +0200
commitc76f0f7cb546b661b5e0ac769850a5c854927f65 (patch)
tree2435747fe4864fdd2406be8bcd089fb9e9eda33b /Documentation/gpu
parent5ba57babcb40227ceb70d9bc71afa57e004f8417 (diff)
downloadlinux-c76f0f7cb546b661b5e0ac769850a5c854927f65.tar.bz2
drm: Begin an API for in-kernel clients
This the beginning of an API for in-kernel clients. First out is a way to get a framebuffer backed by a dumb buffer. Only GEM drivers are supported. The original idea of using an exported dma-buf was dropped because it also creates an anonomous file descriptor which doesn't work when the buffer is created from a kernel thread. The easy way out is to use drm_driver.gem_prime_vmap to get the virtual address, which requires a GEM object. This excludes the vmwgfx driver which is the only non-GEM driver apart from the legacy ones. A solution for vmwgfx will have to be worked out later if it wants to support the client API which it probably will when we have a bootsplash client. Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20180703160354.59955-2-noralf@tronnes.org
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-client.rst12
-rw-r--r--Documentation/gpu/index.rst1
2 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-client.rst b/Documentation/gpu/drm-client.rst
new file mode 100644
index 000000000000..7e672063e7eb
--- /dev/null
+++ b/Documentation/gpu/drm-client.rst
@@ -0,0 +1,12 @@
+=================
+Kernel clients
+=================
+
+.. kernel-doc:: drivers/gpu/drm/drm_client.c
+ :doc: overview
+
+.. kernel-doc:: include/drm/drm_client.h
+ :internal:
+
+.. kernel-doc:: drivers/gpu/drm/drm_client.c
+ :export:
diff --git a/Documentation/gpu/index.rst b/Documentation/gpu/index.rst
index 00288f34c5a6..1fcf8e851e15 100644
--- a/Documentation/gpu/index.rst
+++ b/Documentation/gpu/index.rst
@@ -10,6 +10,7 @@ Linux GPU Driver Developer's Guide
drm-kms
drm-kms-helpers
drm-uapi
+ drm-client
drivers
vga-switcheroo
vgaarbiter