linux-stable.git/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c, branch v4.7.2

drm/amdgpu: Disable RPM helpers while reprobing connectors on resume

2016-08-20T16:10:59+00:00

commit 23a1a9e54e71593fe5657e883662995d181d2d6b upstream.

Just about all of amdgpu's connector probing functions try to acquire
runtime PM refs. If we try to do this in the context of
amdgpu_resume_kms by calling drm_helper_hpd_irq_event(), we end up
deadlocking the system.

Since we're guaranteed to be holding the spinlock for RPM in
amdgpu_resume_kms, and we already know the GPU is in working order, we
need to prevent the RPM helpers from trying to run during the initial
connector reprobe on resume.

There's a couple of solutions I've explored for fixing this, but this
one by far seems to be the simplest and most reliable (plus I'm pretty
sure that's what disable_depth is there for anyway).

Reproduction recipe:
  - Get any laptop dual GPUs using PRIME
  - Make sure runtime PM is enabled for amdgpu
  - Boot the machine
  - If the machine managed to boot without hanging, switch out of X to
    another VT. This should definitely cause X to hang infinitely.

Changes since v1:
  - add appropriate #ifdef checks for CONFIG_PM. This is not very
    useful, but it appears some kernel test suites test compiling amdgpu
    with CONFIG_PM disabled, which results in this patch breaking the builds
    if we don't include this #ifdef

Cc: Alex Deucher 
Reviewed-by: Alex Deucher 
Signed-off-by: Lyude 
Signed-off-by: Alex Deucher 
Signed-off-by: Greg Kroah-Hartman

drm/amdgpu: precedence bug in amdgpu_device_init()

2016-06-20T21:06:10+00:00

! has higher precedence than bitwise & so we need to add parenthesis
for this to work as intended.

Fixes: 048765ad5af7 ('amdgpu: fix asic initialization for virtualized environments (v2)')
Signed-off-by: Dan Carpenter 
Signed-off-by: Alex Deucher

amdgpu: fix asic initialization for virtualized environments (v2)

2016-06-13T19:25:20+00:00

When executing in a PCI passthrough based virtuzliation environemnt, the
hypervisor will usually attempt to send a PCIe bus reset signal to the
ASIC when the VM reboots. In this scenario, the card is not correctly
initialized, but we still consider it to be posted. Therefore, in a
passthrough based environemnt we should always post the card to guarantee
it is in a good state for driver initialization.

However, if we are operating in SR-IOV mode it is up to the GIM driver
to manage the asic state, therefore we should not post the card (and
shouldn't be able to do it either).

v2: add missing semi-colon

Reviewed-by: Christian König 
Signed-off-by: Andres Rodriguez 
Signed-off-by: Alex Deucher

drm/amdgpu: fix mem leak in atombios

2016-06-09T14:49:04+00:00

Signed-off-by: Monk Liu 
Reviewed-by: Christian König 
Signed-off-by: Alex Deucher

drm/amdgpu: vBIOS post only call when mem_size zero

2016-06-09T14:49:00+00:00

Signed-off-by: Monk Liu 
Reviewed-by: Alex Deucher 
Reviewed-by: Christian König 
Signed-off-by: Alex Deucher

drm/amdgpu: fix pplib finish bug

2016-06-09T14:48:56+00:00

1,should use late_fini to kfree all resource otherwise
the released pointer maybe accessed in IRQ ip fini routine.

2,hwmgr should not be kfree by pem_fini which is invoked
by hw fini path.

Signed-off-by: Monk Liu 
Reviewed-by: Alex Deucher 
Reviewed-by: Christian König 
Signed-off-by: Alex Deucher

drm/amd/amdgpu: Added more named DRM info messages for debugging

2016-05-11T16:31:26+00:00

Signed-off-by: Tom St Denis 
Reviewed-by: Alex Deucher 
Signed-off-by: Alex Deucher

drm/amd/amdgpu: Add name field to amd_ip_funcs (v2)

2016-05-11T16:31:26+00:00

Add name that we can print out in kernel messages
to aid in debugging.

v2: drop DAL changes for upstream

Signed-off-by: Tom St Denis 
Reviewed-by: Alex Deucher 
Signed-off-by: Alex Deucher

drm/amd: cleanup remaining spaces and tabs v2

2016-05-11T16:31:20+00:00

This is the result of running the following commands:
find drivers/gpu/drm/amd/ -name "*.h" -exec sed -i 's/[ \t]\+$//' {} \;
find drivers/gpu/drm/amd/ -name "*.c" -exec sed -i 's/[ \t]\+$//' {} \;
find drivers/gpu/drm/amd/ -name "*.h" -exec sed -i 's/ \+\t/\t/' {} \;
find drivers/gpu/drm/amd/ -name "*.c" -exec sed -i 's/ \+\t/\t/' {} \;

v2: drop changes to DAL and internal headers

Signed-off-by: Christian König 
Reviewed-by: Alex Deucher 
Signed-off-by: Alex Deucher

Merge tag 'v4.6-rc7' into drm-next

2016-05-09T03:49:56+00:00

Merge this back as we've built up a fair few conflicts, and I have
some newer trees to pull in.