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authorDaniel Vetter <daniel.vetter@ffwll.ch>2016-08-12 22:48:48 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2016-08-16 17:11:19 +0200
commit750fb8c439bcaa2752d717503119f66032a22b76 (patch)
tree233dfaafde8eef75bf1d26b2c783747ca55b65c7 /Documentation/gpu
parent7520a277d97be6e8a8ec038bb5ed01f40d4f9aeb (diff)
drm/doc: Update drm_framebuffer docs
- Move the intro section into a DOC comment, and update it slightly. - kernel-doc for struct drm_framebuffer! v2: - Copypaste fail (Sean). - Explain the linear @offsets clearer (Ville). Cc: Sean Paul <seanpaul@chromium.org> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1471034937-651-12-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'Documentation/gpu')
-rw-r--r--Documentation/gpu/drm-kms.rst26
1 files changed, 2 insertions, 24 deletions
diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst
index 8264a88a8695..d244e03658cc 100644
--- a/Documentation/gpu/drm-kms.rst
+++ b/Documentation/gpu/drm-kms.rst
@@ -39,30 +39,8 @@ Atomic Mode Setting Function Reference
Frame Buffer Abstraction
========================
-Frame buffers are abstract memory objects that provide a source of
-pixels to scanout to a CRTC. Applications explicitly request the
-creation of frame buffers through the DRM_IOCTL_MODE_ADDFB(2) ioctls
-and receive an opaque handle that can be passed to the KMS CRTC control,
-plane configuration and page flip functions.
-
-Frame buffers rely on the underneath memory manager for low-level memory
-operations. When creating a frame buffer applications pass a memory
-handle (or a list of memory handles for multi-planar formats) through
-the ``drm_mode_fb_cmd2`` argument. For drivers using GEM as their
-userspace buffer management interface this would be a GEM handle.
-Drivers are however free to use their own backing storage object
-handles, e.g. vmwgfx directly exposes special TTM handles to userspace
-and so expects TTM handles in the create ioctl and not GEM handles.
-
-The lifetime of a drm framebuffer is controlled with a reference count,
-drivers can grab additional references with
-:c:func:`drm_framebuffer_reference()`and drop them again with
-:c:func:`drm_framebuffer_unreference()`. For driver-private
-framebuffers for which the last reference is never dropped (e.g. for the
-fbdev framebuffer when the struct :c:type:`struct drm_framebuffer
-<drm_framebuffer>` is embedded into the fbdev helper struct)
-drivers can manually clean up a framebuffer at module unload time with
-:c:func:`drm_framebuffer_unregister_private()`.
+.. kernel-doc:: drivers/gpu/drm/drm_framebuffer.c
+ :doc: overview
Frame Buffer Functions Reference
--------------------------------