linux-stable.git/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c, branch v5.2

drm/amd/display: In VRR mode, do DRM core vblank handling at end of vblank. (v2)

2019-04-03T15:00:33+00:00

In VRR mode, proper vblank/pageflip timestamps can only be computed
after the display scanout position has left front-porch. Therefore
delay calls to drm_crtc_handle_vblank(), and thereby calls to
drm_update_vblank_count() and pageflip event delivery, to after the
end of front-porch when in VRR mode.

We add a new vupdate irq, which triggers at the end of the vupdate
interval, ie. at the end of vblank, and calls the core vblank handler
function. The new irq handler is not executed in standard non-VRR
mode, so vblank handling for fixed refresh rate mode is identical
to the past implementation.

v2: Implement feedback by Nicholas and Paul Menzel.

Signed-off-by: Mario Kleiner 
Acked-by: Harry Wentland 
Reviewed-by: Nicholas Kazlauskas 
Signed-off-by: Alex Deucher

drm/amd/display: Initial documentation for AMDgpu DC

2018-11-05T19:21:37+00:00

[Why]
Documentation is helpful for the community to understand our code.
This change does some high-level documentation of some DM interfaces
with DRM, and the amdgpu base driver.

[How]
An entry for AMDgpu DC has been added to Documentation/gpu/drivers.rst
TOC. amdgpu-dc.rst is created to pull in inline doc-strings, which:
- Provides an overview for "What is DM?"
- Documents AMDgpu DM lifecyle
- Documents IRQ management
- Documents atomic_check and commit_tail interfaces

Signed-off-by: Leo Li 
Reviewed-by: David Francis 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Flatten irq handler data struct

2018-10-09T22:03:38+00:00

[Why]
There is no reason why the common data needs to be kept separate.

[How]
Flatten the struct by moving common data into the DM IRQ struct.

Signed-off-by: Leo Li 
Reviewed-by: David Francis 
Acked-by: Leo Li 
Signed-off-by: Alex Deucher

drm/amd/display: Do not program interrupt status on disabled crtc

2018-05-29T18:30:38+00:00

Prevent interrupt programming of a crtc on which the stream is disabled and
it doesn't have an OTG to reference.

Signed-off-by: Mikita Lipski 
Reviewed-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Fix deadlock when flushing irq

2018-04-25T15:07:29+00:00

Lock irq table when reading a work in queue,
unlock to flush the work, lock again till all tasks
are cleared

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

drm/amd/display: Set irq state only on existing crtcs

2018-02-19T19:19:28+00:00

Because AMDGPU_CRTC_IRQ_VLINE1 = 6, it expected 6 more crtcs to be
programed with disabled irq state in amdgpu_irq_disable_all. That caused errors and accessed
the wrong memory location.

Signed-off-by: Mikita Lipski 
Reviewed-by: Tony Cheng 
Reviewed-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Remove timer handler.

2018-02-19T19:18:45+00:00

Dead code, looks obsolete.

Signed-off-by: Andrey Grodzovsky 
Reviewed-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Use real number of CRTCs and HPDs in set_irq_funcs

2017-12-04T21:41:40+00:00

Corresponding to the previous non-DC change.

Signed-off-by: Michel Dänzer 
Reviewed-by: Alex Deucher 
Acked-by: Christian König 
Signed-off-by: Alex Deucher

drm/amd/display: Fix brace style

2017-10-21T20:53:46+00:00

Signed-off-by: Tom St Denis 
Acked-by: Andrey Grodzovsky  
Reviewed-by: Harry Wentland 
Signed-off-by: Alex Deucher

drm/amd/display: Fix irq enable/disable on resume.

2017-10-21T20:46:40+00:00

Fixing loop boundaries in irq enable/disable on resume.

Signed-off-by: Roman Li 
Reviewed-by: Mikita Lipski 
Acked-by: Harry Wentland 
Signed-off-by: Alex Deucher