linux-toradex.git/drivers/gpu, branch v4.5-rc3

Merge branch 'drm-fixes-mst' of git://people.freedesktop.org/~airlied/linux into drm-fixes

2016-02-05T05:24:17+00:00

displayport multistream fixes from AMD.

* 'drm-fixes-mst' of git://people.freedesktop.org/~airlied/linux:
  drm/dp/mst: deallocate payload on port destruction
  drm/dp/mst: Reverse order of MST enable and clearing VC payload table.
  drm/dp/mst: move GUID storage from mgr, port to only mst branch
  drm/dp/mst: change MST detection scheme
  drm/dp/mst: Calculate MST PBN with 31.32 fixed point
  drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil
  drm/mst: Add range check for max_payloads during init
  drm/mst: Don't ignore the MST PBN self-test result
  drm: fix missing reference counting decrease

drm/dp/mst: deallocate payload on port destruction

2016-02-05T05:23:49+00:00

This is needed to properly deallocate port payload
after downstream branch get unplugged.

In order to do this unplugged MST topology should
be preserved, to find first alive port on path to
unplugged MST topology, and send payload deallocation
request to branch device of found port.

For this mstb and port kref's are used in reversed
order to track when port and branch memory could be
freed.

Added additional functions to find appropriate mstb
as described above.

Signed-off-by: Mykola Lysenko 
Reviewed-by: Harry Wentland 
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie

drm/dp/mst: Reverse order of MST enable and clearing VC payload table.

2016-02-05T05:23:49+00:00

On DELL U3014 if you clear the table before enabling MST it sometimes
hangs the receiver.

Signed-off-by: Andrey Grodzovsky 
Reviewed-by: Harry Wentland 
Cc: stable@vger.kernel.org
Acked-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm/dp/mst: move GUID storage from mgr, port to only mst branch

2016-02-05T05:23:49+00:00

Previous implementation does not handle case below: boot up one MST branch
to DP connector of ASIC. After boot up, hot plug 2nd MST branch to DP output
of 1st MST, GUID is not created for 2nd MST branch. When downstream port of
2nd MST branch send upstream request, it fails because 2nd MST branch GUID
is not available.

New Implementation: only create GUID for MST branch and save it within Branch.

Signed-off-by: Hersen Wu 
Reviewed-by: Harry Wentland 
Cc: stable@vger.kernel.org
Acked-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm/dp/mst: change MST detection scheme

2016-02-05T05:23:49+00:00

1. Get edid for all connected MST displays, not only on logical ports,
   in the same thread as MST topology detection is done:
     There are displays that have branches inside w/o logical ports.
     So in case another SST display connected downstream system can
     end-up in situation when 3 DOWN requests sent: two for
    ‘remote i2c read’ and one for ‘enum path resources’, making slots full.

2. Call notification callback in one place in the end of topology discovery/update:
     This is done to reduce number of events sent to userspace in case complex
     topology discovery is going, adding multiple number of connectors;

3. Remove notification callback call from short pulse interrupt processing function:
     This is done in order not to block interrupt processing function, in case any
     MST request will be made from it. Notification will be send from topology
     discovery/update work item.

Signed-off-by: Mykola Lysenko 
Reviewed-by: Harry Wentland 
Cc: stable@vger.kernel.org
Acked-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm/dp/mst: Calculate MST PBN with 31.32 fixed point

2016-02-05T05:23:49+00:00

Our PBN value overflows the 20 bits integer part of the 20.12
fixed point. We need to use 31.32 fixed point to avoid this.

This happens with display clocks larger than 293122 (at 24 bpp),
which we see with the Sharp (and similar) 4k tiled displays.

Signed-off-by: Harry Wentland 
Cc: stable@vger.kernel.org
Reviewed-by: Alex Deucher 
Signed-off-by: Dave Airlie

drm/mst: Add range check for max_payloads during init

2016-02-05T05:23:48+00:00

max_payload is limited by the space we have in
drm_dp_mst_topology_mgr::vcpi_mask,payload_mask. We need to track
max_payloads+1 IDs in these masks, see drm_dp_mst_assign_payload_id().
Add a sanity check for this.

Caught by coverity.

Signed-off-by: Imre Deak 
Reviewed-by: David Weinehall 
Signed-off-by: Dave Airlie

drm/mst: Don't ignore the MST PBN self-test result

2016-02-05T05:23:48+00:00

Otherwise this call would have no effect.

Caught by Coverity.

Signed-off-by: Imre Deak 
Reviewed-by: David Weinehall 
Signed-off-by: Dave Airlie

drm: fix missing reference counting decrease

2016-02-05T05:23:48+00:00

In drm_dp_mst_allocate_vcpi, it returns true in two paths,
but in one path, there is no reference couting decrease.

Signed-off-by: Insu Yun 
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie

Merge branch 'drm-fixes-4.5' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

2016-02-05T04:48:36+00:00

- fix and enable iceland/topaz support
- handle WC on platforms that don't support it

* 'drm-fixes-4.5' of git://people.freedesktop.org/~agd5f/linux:
  drm/amdgpu: disable uvd and vce clockgating on Fiji
  drm/amdgpu: remove exp hardware support from iceland
  drm/amdgpu: load MEC ucode manually on iceland
  drm/amdgpu: don't load MEC2 on topaz
  drm/amdgpu: drop topaz support from gmc8 module
  drm/amdgpu: pull topaz gmc bits into gmc_v7
  drm/amdgpu: The VI specific EXE bit should only apply to GMC v8.0 above
  drm/amdgpu: iceland use CI based MC IP
  drm/amdgpu: move gmc7 support out of CIK dependency
  drm/amdgpu/gfx7: enable cp inst/reg error interrupts
  drm/amdgpu/gfx8: enable cp inst/reg error interrupts
  drm/amdgpu: mask out WC from BO on unsupported arches
  drm/radeon: mask out WC from BO on unsupported arches
  drm: add helper to check for wc memory support
  drm/amdgpu: no need to load MC firmware on fiji