Groups > linux.kernel > #1681906

[PATCH 0/3] drm: Add CRTC-id based ioctls for vblank query/event

From	Keith Packard <keithp@keithp.com>
Newsgroups	linux.kernel
Subject	[PATCH 0/3] drm: Add CRTC-id based ioctls for vblank query/event
Date	2017-07-06 00:20 +0200
Message-ID	<u00Ol-3Tl-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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This patch series provides a new interface which fixes three issues
with the current VBLANK_WAIT ioctl:

 1) CRTC indices to select a target.
 2) 32-bits of count resolution.
 3) Microsecond time resolution.

The first makes it quite difficult to use this interface from a leased
DRM device; without the ability to see all of the crtcs for a DRM
device, it's not possible to compute the right index into the array of
them for this interface.

2) and 3) prevent the API from matching the requirements for Vulkan,
which asks for 64-bits of counter and nano-second time resolution.

I've split this series into three pieces, the first two adjust the
internal APIs without exposing new functionality, the third adds the
new IOCTLs.

 [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank time

This changes all DRM-level internal interfaces to 64-bit vblank
counters and nano-second time resolution. Changing the driver
interface to 64-bits seems like the right plan, but as no drivers
currently support anything wider than 32-bits, it may be that we don't
want to bother at this point.

 [PATCH 2/3] drm: Reorganize drm_pending_event to support future event

This sticks the vblank event in a union inside of the pending event
structure so that I can add another parallel event in the next
patch. Importantly, this required that I move the assignment of the
event crtc_id field from event deliver to event allocation. That
"shouldn't" matter, but it should also be looked at with some care.

 [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls

With the internal APIs ready, this patch is pretty simple.

-keith

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[PATCH 0/3] drm: Add CRTC-id based ioctls for vblank query/event Keith Packard <keithp@keithp.com> - 2017-07-06 00:20 +0200
  [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank time precision to ns Keith Packard <keithp@keithp.com> - 2017-07-06 00:20 +0200
    Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank  time precision to ns Daniel Vetter <daniel@ffwll.ch> - 2017-07-06 09:30 +0200
      Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank time precision to ns Keith Packard <keithp@keithp.com> - 2017-07-06 17:10 +0200
        Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank  time precision to ns Daniel Vetter <daniel@ffwll.ch> - 2017-07-07 14:20 +0200
    Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank  time precision to ns Michel Dänzer <michel@daenzer.net> - 2017-07-06 09:50 +0200
      Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank  time precision to ns Michel Dänzer <michel@daenzer.net> - 2017-07-06 10:10 +0200
        Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank time precision to ns Keith Packard <keithp@keithp.com> - 2017-07-06 17:20 +0200
      Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank time precision to ns Keith Packard <keithp@keithp.com> - 2017-07-06 17:10 +0200
        Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank  time precision to ns Michel Dänzer <michel@daenzer.net> - 2017-07-07 03:40 +0200
          Re: [PATCH 1/3] drm: Widen vblank count to 64 bits. Change vblank  time precision to ns Michel Dänzer <michel@daenzer.net> - 2017-07-07 04:10 +0200
  [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls Keith Packard <keithp@keithp.com> - 2017-07-06 00:20 +0200
    Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE  ioctls Daniel Vetter <daniel@ffwll.ch> - 2017-07-06 10:00 +0200
      Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE  ioctls Ville Syrjälä <ville.syrjala@linux.intel.com> - 2017-07-06 12:20 +0200
        Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls Daniel Vetter <daniel@ffwll.ch> - 2017-07-06 13:10 +0200
          Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE  ioctls Ville Syrjälä <ville.syrjala@linux.intel.com> - 2017-07-06 16:10 +0200
            Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls Keith Packard <keithp@keithp.com> - 2017-07-06 18:30 +0200
              Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE  ioctls Ville Syrjälä <ville.syrjala@linux.intel.com> - 2017-07-06 20:10 +0200
                Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls Keith Packard <keithp@keithp.com> - 2017-07-06 20:30 +0200
                Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE  ioctls Ville Syrjälä <ville.syrjala@linux.intel.com> - 2017-07-06 21:00 +0200
                Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls Keith Packard <keithp@keithp.com> - 2017-07-06 21:50 +0200
      Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls Keith Packard <keithp@keithp.com> - 2017-07-06 18:30 +0200
        Re: [PATCH 3/3] drm: Add CRTC_GET_SEQUENCE and CRTC_QUEUE_SEQUENCE ioctls Daniel Vetter <daniel@ffwll.ch> - 2017-07-06 23:50 +0200
  [PATCH 2/3] drm: Reorganize drm_pending_event to support future event types Keith Packard <keithp@keithp.com> - 2017-07-06 00:20 +0200
    Re: [PATCH 2/3] drm: Reorganize drm_pending_event to support future  event types Daniel Vetter <daniel@ffwll.ch> - 2017-07-06 09:40 +0200
      Re: [PATCH 2/3] drm: Reorganize drm_pending_event to support future event types Keith Packard <keithp@keithp.com> - 2017-07-06 17:40 +0200
        Re: [PATCH 2/3] drm: Reorganize drm_pending_event to support future  event types Daniel Vetter <daniel@ffwll.ch> - 2017-07-07 14:10 +0200

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