mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-10-19 19:11:47 -05:00
Daniel Vetter
976f8a2013
This requires a few changes - We still need a noop function for crtc->disable, becuase the fb helper is a bit too intimate with the crtc helper. - We need to clear crtc->fb ourselves in intel_crtc_disable now that we no longer rely on the helper's disable_unused_functions to do that. - We need to split out the sare update code, becuase the crtc code can't call update_dpms any more, it needs to disable the crtc unconditionally. This is because we now keep onto the encoder -> crtc mapping of the (still) active output pipe configuration. - To check that we really disable a crtc that still has encoders, insert a WARN_ON(!enabled) in the crtc disable function. - Lastly, we need to walk over all crtcs to update their enabled state after having called commit_output_state - for all disabled crtcs the crtc helper code has done that for us previously. v2: Update connector dpms and encoder->connectors_active after disabling the crtc, too. v3: Noop-out intel_encoder_disable. Similarly to the crtc disable callback used by the crtc helper code we can't simply remove all these encoder callbacks: The fb helper (which we still use) has a rather incetious relationship with the crtc helper code ... Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
************************************************************
* For the very latest on DRI development, please see: *
* http://dri.freedesktop.org/ *
************************************************************
The Direct Rendering Manager (drm) is a device-independent kernel-level
device driver that provides support for the XFree86 Direct Rendering
Infrastructure (DRI).
The DRM supports the Direct Rendering Infrastructure (DRI) in four major
ways:
1. The DRM provides synchronized access to the graphics hardware via
the use of an optimized two-tiered lock.
2. The DRM enforces the DRI security policy for access to the graphics
hardware by only allowing authenticated X11 clients access to
restricted regions of memory.
3. The DRM provides a generic DMA engine, complete with multiple
queues and the ability to detect the need for an OpenGL context
switch.
4. The DRM is extensible via the use of small device-specific modules
that rely extensively on the API exported by the DRM module.
Documentation on the DRI is available from:
http://dri.freedesktop.org/wiki/Documentation
http://sourceforge.net/project/showfiles.php?group_id=387
http://dri.sourceforge.net/doc/
For specific information about kernel-level support, see:
The Direct Rendering Manager, Kernel Support for the Direct Rendering
Infrastructure
http://dri.sourceforge.net/doc/drm_low_level.html
Hardware Locking for the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/hardware_locking_low_level.html
A Security Analysis of the Direct Rendering Infrastructure
http://dri.sourceforge.net/doc/security_low_level.html