mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
0b638559aa
- Move the shmem helper section to the drm-mm.rst file, next to the vram helpers. Makes a lot more sense there with the now wider scope. Also, that's where the all the other backing storage stuff resides. It's just the framebuffer helpers that should be in the kms helper section. - Try to clarify which functiosn are for implementing drm_gem_object_funcs, and which for drivers to call directly. At least one driver screwed that up a bit. Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Rob Herring <robh@kernel.org> Cc: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200511093554.211493-4-daniel.vetter@ffwll.ch
414 lines
10 KiB
ReStructuredText
414 lines
10 KiB
ReStructuredText
=============================
|
|
Mode Setting Helper Functions
|
|
=============================
|
|
|
|
The DRM subsystem aims for a strong separation between core code and helper
|
|
libraries. Core code takes care of general setup and teardown and decoding
|
|
userspace requests to kernel internal objects. Everything else is handled by a
|
|
large set of helper libraries, which can be combined freely to pick and choose
|
|
for each driver what fits, and avoid shared code where special behaviour is
|
|
needed.
|
|
|
|
This distinction between core code and helpers is especially strong in the
|
|
modesetting code, where there's a shared userspace ABI for all drivers. This is
|
|
in contrast to the render side, where pretty much everything (with very few
|
|
exceptions) can be considered optional helper code.
|
|
|
|
There are a few areas these helpers can grouped into:
|
|
|
|
* Helpers to implement modesetting. The important ones here are the atomic
|
|
helpers. Old drivers still often use the legacy CRTC helpers. They both share
|
|
the same set of common helper vtables. For really simple drivers (anything
|
|
that would have been a great fit in the deprecated fbdev subsystem) there's
|
|
also the simple display pipe helpers.
|
|
|
|
* There's a big pile of helpers for handling outputs. First the generic bridge
|
|
helpers for handling encoder and transcoder IP blocks. Second the panel helpers
|
|
for handling panel-related information and logic. Plus then a big set of
|
|
helpers for the various sink standards (DisplayPort, HDMI, MIPI DSI). Finally
|
|
there's also generic helpers for handling output probing, and for dealing with
|
|
EDIDs.
|
|
|
|
* The last group of helpers concerns itself with the frontend side of a display
|
|
pipeline: Planes, handling rectangles for visibility checking and scissoring,
|
|
flip queues and assorted bits.
|
|
|
|
Modeset Helper Reference for Common Vtables
|
|
===========================================
|
|
|
|
.. kernel-doc:: include/drm/drm_modeset_helper_vtables.h
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: include/drm/drm_modeset_helper_vtables.h
|
|
:internal:
|
|
|
|
.. _drm_atomic_helper:
|
|
|
|
Atomic Modeset Helper Functions Reference
|
|
=========================================
|
|
|
|
Overview
|
|
--------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
|
|
:doc: overview
|
|
|
|
Implementing Asynchronous Atomic Commit
|
|
---------------------------------------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
|
|
:doc: implementing nonblocking commit
|
|
|
|
Helper Functions Reference
|
|
--------------------------
|
|
|
|
.. kernel-doc:: include/drm/drm_atomic_helper.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_atomic_helper.c
|
|
:export:
|
|
|
|
Atomic State Reset and Initialization
|
|
-------------------------------------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_atomic_state_helper.c
|
|
:doc: atomic state reset and initialization
|
|
|
|
Atomic State Helper Reference
|
|
-----------------------------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_atomic_state_helper.c
|
|
:export:
|
|
|
|
Simple KMS Helper Reference
|
|
===========================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_simple_kms_helper.c
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: include/drm/drm_simple_kms_helper.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_simple_kms_helper.c
|
|
:export:
|
|
|
|
fbdev Helper Functions Reference
|
|
================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_fb_helper.c
|
|
:doc: fbdev helpers
|
|
|
|
.. kernel-doc:: include/drm/drm_fb_helper.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_fb_helper.c
|
|
:export:
|
|
|
|
format Helper Functions Reference
|
|
=================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_format_helper.c
|
|
:export:
|
|
|
|
Framebuffer CMA Helper Functions Reference
|
|
==========================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_fb_cma_helper.c
|
|
:doc: framebuffer cma helper functions
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_fb_cma_helper.c
|
|
:export:
|
|
|
|
Framebuffer GEM Helper Reference
|
|
================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_gem_framebuffer_helper.c
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_gem_framebuffer_helper.c
|
|
:export:
|
|
|
|
.. _drm_bridges:
|
|
|
|
Bridges
|
|
=======
|
|
|
|
Overview
|
|
--------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_bridge.c
|
|
:doc: overview
|
|
|
|
Bridge Operations
|
|
-----------------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_bridge.c
|
|
:doc: bridge operations
|
|
|
|
Bridge Connector Helper
|
|
-----------------------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_bridge_connector.c
|
|
:doc: overview
|
|
|
|
|
|
Bridge Helper Reference
|
|
-------------------------
|
|
|
|
.. kernel-doc:: include/drm/drm_bridge.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_bridge.c
|
|
:export:
|
|
|
|
Bridge Connector Helper Reference
|
|
---------------------------------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_bridge_connector.c
|
|
:export:
|
|
|
|
Panel-Bridge Helper Reference
|
|
-----------------------------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/bridge/panel.c
|
|
:export:
|
|
|
|
.. _drm_panel_helper:
|
|
|
|
Panel Helper Reference
|
|
======================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_panel.c
|
|
:doc: drm panel
|
|
|
|
.. kernel-doc:: include/drm/drm_panel.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_panel.c
|
|
:export:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_panel_orientation_quirks.c
|
|
:export:
|
|
|
|
Panel Self Refresh Helper Reference
|
|
===================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_self_refresh_helper.c
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_self_refresh_helper.c
|
|
:export:
|
|
|
|
HDCP Helper Functions Reference
|
|
===============================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_hdcp.c
|
|
:export:
|
|
|
|
Display Port Helper Functions Reference
|
|
=======================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_helper.c
|
|
:doc: dp helpers
|
|
|
|
.. kernel-doc:: include/drm/drm_dp_helper.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_helper.c
|
|
:export:
|
|
|
|
Display Port CEC Helper Functions Reference
|
|
===========================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_cec.c
|
|
:doc: dp cec helpers
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_cec.c
|
|
:export:
|
|
|
|
Display Port Dual Mode Adaptor Helper Functions Reference
|
|
=========================================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_dual_mode_helper.c
|
|
:doc: dp dual mode helpers
|
|
|
|
.. kernel-doc:: include/drm/drm_dp_dual_mode_helper.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_dual_mode_helper.c
|
|
:export:
|
|
|
|
Display Port MST Helpers
|
|
========================
|
|
|
|
Overview
|
|
--------
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_mst_topology.c
|
|
:doc: dp mst helper
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_mst_topology.c
|
|
:doc: Branch device and port refcounting
|
|
|
|
Functions Reference
|
|
-------------------
|
|
|
|
.. kernel-doc:: include/drm/drm_dp_mst_helper.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_mst_topology.c
|
|
:export:
|
|
|
|
Topology Lifetime Internals
|
|
---------------------------
|
|
|
|
These functions aren't exported to drivers, but are documented here to help make
|
|
the MST topology helpers easier to understand
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dp_mst_topology.c
|
|
:functions: drm_dp_mst_topology_try_get_mstb drm_dp_mst_topology_get_mstb
|
|
drm_dp_mst_topology_put_mstb
|
|
drm_dp_mst_topology_try_get_port drm_dp_mst_topology_get_port
|
|
drm_dp_mst_topology_put_port
|
|
drm_dp_mst_get_mstb_malloc drm_dp_mst_put_mstb_malloc
|
|
|
|
MIPI DBI Helper Functions Reference
|
|
===================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_mipi_dbi.c
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: include/drm/drm_mipi_dbi.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_mipi_dbi.c
|
|
:export:
|
|
|
|
MIPI DSI Helper Functions Reference
|
|
===================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_mipi_dsi.c
|
|
:doc: dsi helpers
|
|
|
|
.. kernel-doc:: include/drm/drm_mipi_dsi.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_mipi_dsi.c
|
|
:export:
|
|
|
|
Display Stream Compression Helper Functions Reference
|
|
=====================================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dsc.c
|
|
:doc: dsc helpers
|
|
|
|
.. kernel-doc:: include/drm/drm_dsc.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_dsc.c
|
|
:export:
|
|
|
|
Output Probing Helper Functions Reference
|
|
=========================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_probe_helper.c
|
|
:doc: output probing helper overview
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_probe_helper.c
|
|
:export:
|
|
|
|
EDID Helper Functions Reference
|
|
===============================
|
|
|
|
.. kernel-doc:: include/drm/drm_edid.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_edid.c
|
|
:export:
|
|
|
|
SCDC Helper Functions Reference
|
|
===============================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_scdc_helper.c
|
|
:doc: scdc helpers
|
|
|
|
.. kernel-doc:: include/drm/drm_scdc_helper.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_scdc_helper.c
|
|
:export:
|
|
|
|
HDMI Infoframes Helper Reference
|
|
================================
|
|
|
|
Strictly speaking this is not a DRM helper library but generally useable
|
|
by any driver interfacing with HDMI outputs like v4l or alsa drivers.
|
|
But it nicely fits into the overall topic of mode setting helper
|
|
libraries and hence is also included here.
|
|
|
|
.. kernel-doc:: include/linux/hdmi.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/video/hdmi.c
|
|
:export:
|
|
|
|
Rectangle Utilities Reference
|
|
=============================
|
|
|
|
.. kernel-doc:: include/drm/drm_rect.h
|
|
:doc: rect utils
|
|
|
|
.. kernel-doc:: include/drm/drm_rect.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_rect.c
|
|
:export:
|
|
|
|
Flip-work Helper Reference
|
|
==========================
|
|
|
|
.. kernel-doc:: include/drm/drm_flip_work.h
|
|
:doc: flip utils
|
|
|
|
.. kernel-doc:: include/drm/drm_flip_work.h
|
|
:internal:
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_flip_work.c
|
|
:export:
|
|
|
|
Auxiliary Modeset Helpers
|
|
=========================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_modeset_helper.c
|
|
:doc: aux kms helpers
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_modeset_helper.c
|
|
:export:
|
|
|
|
OF/DT Helpers
|
|
=============
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_of.c
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_of.c
|
|
:export:
|
|
|
|
Legacy Plane Helper Reference
|
|
=============================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_plane_helper.c
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_plane_helper.c
|
|
:export:
|
|
|
|
Legacy CRTC/Modeset Helper Functions Reference
|
|
==============================================
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_crtc_helper.c
|
|
:doc: overview
|
|
|
|
.. kernel-doc:: drivers/gpu/drm/drm_crtc_helper.c
|
|
:export:
|