It seems that the pipe-a power well has replaced the disp2d power well
on chv. At least that's the case with the current punit firmware. So
enable the pipe-a power and expand its domains to cover everything the
disp2d well ought to cover.
The other power wells (apart from the cmnlane wells) still seem awol
in the current punit firmware. So leave them disabled in the code.
This fixes a hilarious oops during resume on bsw where
intel_hdmi_get_config() would read the port register and get back
0xffffffff and thus think the port is enabled on pipe D. It would then
go and index the pipe_to_crtc_mapping[] array with PIPE_D and blow up
when intel_hdmi_get_config() tries to write to crtc->config. Someone
really ought to replace all naked pipe_to_crtc_mapping[] uses with the
appropriate function call so we could add a warning there if the pipe
doesn't actually exist...
We must also call the power seqeuencer state reset function from
the pipe-a well disable just like we do from disp2d on vlv. Otherwise
the eDP panel won't recover at resume time since the PPS has lost its
hold on the port.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=84903
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
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
baa4e575d6