linux-stable.git/include/drm/drmP.h, branch v3.9

drm: add prime helpers

2013-02-08T03:39:08+00:00

Instead of reimplementing all of the dma_buf functionality in every driver,
create helpers drm_prime_import and drm_prime_export that implement them in
terms of new, lower-level hook functions:

  gem_prime_pin: callback when a buffer is created, used to pin buffers into GTT
  gem_prime_get_sg_table: convert a drm_gem_object to an sg_table for export
  gem_prime_import_sg_table: convert an sg_table into a drm_gem_object
  gem_prime_vmap, gem_prime_vunmap: map and unmap an object

These hooks are optional; drivers can opt in by using drm_gem_prime_import and
drm_gem_prime_export as the .gem_prime_import and .gem_prime_export fields of
struct drm_driver.

v2:
- Drop .begin_cpu_access.  None of the drivers this code replaces implemented
  it.  Having it here was a leftover from when I was trying to include i915 in
  this rework.
- Use mutex_lock instead of mutex_lock_interruptible, as these three drivers
  did.  This patch series shouldn't change that behavior.
- Rename helpers to gem_prime_get_sg_table and gem_prime_import_sg_table.
  Rename struct sg_table* variables to 'sgt' for clarity.
- Update drm.tmpl for these new hooks.

v3:
- Pass the vaddr down to the driver.  This lets drivers that just call vunmap on
  the pointer avoid having to store the pointer in their GEM private structures.
- Move documentation into a /** DOC */ comment in drm_prime.c and include it in
  drm.tmpl with a !P line.  I tried to use !F lines to include documentation of
  the individual functions from drmP.h, but the docproc / kernel-doc scripts
  barf on that file, so hopefully this is good enough for now.
- apply refcount fix from commit be8a42ae60addd8b6092535c11b42d099d6470ec
  ("drm/prime: drop reference on imported dma-buf come from gem")

Signed-off-by: Aaron Plattner 
Cc: Daniel Vetter 
Cc: David Airlie 
Signed-off-by: Dave Airlie

Merge tag 'of_videomode_helper' of git://git.pengutronix.de/git/str/linux into drm-next

2013-02-08T02:34:44+00:00

videomode helpers for of + devicetree stuff, required for new kms drivers

(not the fbdev maintainer).

* tag 'of_videomode_helper' of git://git.pengutronix.de/git/str/linux:
  drm_modes: add of_videomode helpers
  drm_modes: add videomode helpers
  fbmon: add of_videomode helpers
  fbmon: add videomode helpers
  video: add of helper for display timings/videomode
  video: add display_timing and videomode
  viafb: rename display_timing to via_display_timing

drm_modes: add of_videomode helpers

2013-01-24T08:04:14+00:00

Add helper to get drm_display_mode from devicetree.

Signed-off-by: Steffen Trumtrar 
Reviewed-by: Thierry Reding 
Acked-by: Thierry Reding 
Tested-by: Thierry Reding 
Tested-by: Philipp Zabel 
Reviewed-by: Laurent Pinchart 
Acked-by: Laurent Pinchart 
Tested-by: Afzal Mohammed 
Tested-by: Rob Clark 
Tested-by: Leela Krishna Amudala

drm_modes: add videomode helpers

2013-01-24T08:04:09+00:00

Add conversion from videomode to drm_display_mode

Signed-off-by: Steffen Trumtrar 
Reviewed-by: Thierry Reding 
Acked-by: Thierry Reding 
Tested-by: Thierry Reding 
Tested-by: Philipp Zabel 
Reviewed-by: Laurent Pinchart 
Acked-by: Laurent Pinchart 
Tested-by: Afzal Mohammed 
Tested-by: Rob Clark 
Tested-by: Leela Krishna Amudala

drm: revamp locking around fb creation/destruction

2013-01-20T21:16:58+00:00

Well, at least step 1. The goal here is that framebuffer objects can
survive outside of the mode_config lock, with just a reference held
as protection. The first step to get there is to introduce a special
fb_lock which protects fb lookup, creation and destruction, to make
them appear atomic.

This new fb_lock can nest within the mode_config lock. But the idea is
(once the reference counting part is completed) that we only quickly
take that fb_lock to lookup a framebuffer and grab a reference,
without any other locks involved.

vmwgfx is the only driver which does framebuffer lookups itself, also
wrap those calls to drm_mode_object_find with the new lock.

Also protect the fb_list walking in i915 and omapdrm with the new lock.

As a slight complication there's also the list of user-created fbs
attached to the file private. The problem now is that at fclose() time
we need to walk that list, eventually do a modeset call to remove the
fb from active usage (and are required to be able to take the
mode_config lock), but in the end we need to grab the new fb_lock to
remove the fb from the list. The easiest solution is to add another
mutex to protect this per-file list.

Currently that new fbs_lock nests within the modeset locks and so
appears redudant. But later patches will switch around this sequence
so that taking the modeset locks in the fb destruction path is
optional in the fastpath. Ultimately the goal is that addfb and rmfb
do not require the mode_config lock, since otherwise they have the
potential to introduce stalls in the pageflip sequence of a compositor
(if the compositor e.g. switches to a fullscreen client or if it
enables a plane). But that requires a few more steps and hoops to jump
through.

Note that framebuffer creation/destruction is now double-protected -
once by the fb_lock and in parts by the idr_lock. The later would be
unnecessariy if framebuffers would have their own idr allocator. But
that's material for another patch (series).

v2: Properly initialize the fb->filp_head list in _init, otherwise the
newly added WARN to check whether the fb isn't on a fpriv list any
more will fail for driver-private objects.

v3: Fixup two error-case unlock bugs spotted by Richard Wilbur.

Reviewed-by: Rob Clark 
Signed-off-by: Daniel Vetter

drm: review locking rules in drm_crtc.c

2013-01-20T14:29:04+00:00

- config_cleanup was confused: It claimed that callers need to hold
  the modeset lock, but the connector|encoder_cleanup helpers grabbed
  that themselves (note that crtc_cleanup did _not_ grab the modeset
  lock). Which resulted in all drivers _not_ hodling the lock. Since
  this is for single-threaded cleanup code, drop the requirement from
  docs and also drop the lock_grabbing from all _cleanup functions.

- Kill the LOCKING section in the doctype, since clearly we're not
  good enough to keep them up-to-date. And misleading locking
  documentation is worse than useless (see e.g. the comment in the
  vmgfx driver about the cleanup mess). And since for most functions
  the very first line either grabs the lock or has a WARN_ON(!locked)
  the documentation doesn't really add anything.

- Instead put in some effort into explaining the only two special
  cases a bit better: config_init and config_cleanup are both called
  from single-threaded setup/teardown code, so don't do any locking.
  It's the driver's job though to enforce this.

- Where lacking, add a WARN_ON(!is_locked). Not many places though,
  since locking around fbdev setup/teardown is through-roughly screwed
  up, and so will break almost every single WARN annotation I've tried
  to add.

- Add a drm_modeset_is_locked helper - the Grate Modset Locking Rework
  will use the compiler to assist in the big reorg by renaming the
  mode lock, so start encapsulating things. Unfortunately this ended
  up in the "wrong" header file since it needs the definition of
  struct drm_device.

v2: Drop most WARNS again - we hit them all over the place, mostly in
the setup and teardown sequences. And trying to fix it up leads to
nice deadlocks, since the locking in the setup code is really
inconsistent.

Reviewed-by: Rob Clark 
Signed-off-by: Daniel Vetter

drm: add support for monotonic vblank timestamps

2012-11-20T06:06:16+00:00

Jumps in the vblank and page flip event timestamps cause trouble for
clients, so we should avoid them. The timestamp we get currently with
gettimeofday can jump, so use instead monotonic timestamps.

For backward compatibility use a module flag to revert back to using
gettimeofday timestamps. Add also a DRM_CAP_TIMESTAMP_MONOTONIC flag
that is simply a read only version of the module flag, so that clients
can query this without depending on sysfs.

Signed-off-by: Imre Deak 
Signed-off-by: Dave Airlie

drm: add drm_send_vblank_event() helper (v5)

2012-11-20T05:47:21+00:00

A helper that drivers can use to send vblank event after a pageflip.
If the driver doesn't support proper vblank irq based time/seqn then
just pass -1 for the pipe # to get do_gettimestamp() behavior (since
there are a lot of drivers that don't use drm_vblank_count_and_time())

Also an internal send_vblank_event() helper for the various other code
paths within drm_irq that also need to send vblank events.

v1: original
v2: add back 'vblwait->reply.sequence = seq' which should not have
    been deleted
v3: add WARN_ON() in case lock is not held and comments
v4: use WARN_ON_SMP() instead to fix issue with !SMP && !DEBUG_SPINLOCK
    as pointed out by Marcin Slusarz
v5: update docbook

Signed-off-by: Rob Clark 
Signed-off-by: Dave Airlie

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

2012-10-04T06:29:23+00:00

Pull drm merge (part 1) from Dave Airlie:
 "So first of all my tree and uapi stuff has a conflict mess, its my
  fault as the nouveau stuff didn't hit -next as were trying to rebase
  regressions out of it before we merged.

  Highlights:
   - SH mobile modesetting driver and associated helpers
   - some DRM core documentation
   - i915 modesetting rework, haswell hdmi, haswell and vlv fixes, write
     combined pte writing, ilk rc6 support,
   - nouveau: major driver rework into a hw core driver, makes features
     like SLI a lot saner to implement,
   - psb: add eDP/DP support for Cedarview
   - radeon: 2 layer page tables, async VM pte updates, better PLL
     selection for > 2 screens, better ACPI interactions

  The rest is general grab bag of fixes.

  So why part 1? well I have the exynos pull req which came in a bit
  late but was waiting for me to do something they shouldn't have and it
  looks fairly safe, and David Howells has some more header cleanups
  he'd like me to pull, that seem like a good idea, but I'd like to get
  this merge out of the way so -next dosen't get blocked."

Tons of conflicts mostly due to silly include line changes, but mostly
mindless.  A few other small semantic conflicts too, noted from Dave's
pre-merged branch.

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (447 commits)
  drm/nv98/crypt: fix fuc build with latest envyas
  drm/nouveau/devinit: fixup various issues with subdev ctor/init ordering
  drm/nv41/vm: fix and enable use of "real" pciegart
  drm/nv44/vm: fix and enable use of "real" pciegart
  drm/nv04/dmaobj: fixup vm target handling in preparation for nv4x pcie
  drm/nouveau: store supported dma mask in vmmgr
  drm/nvc0/ibus: initial implementation of subdev
  drm/nouveau/therm: add support for fan-control modes
  drm/nouveau/hwmon: rename pwm0* to pmw1* to follow hwmon's rules
  drm/nouveau/therm: calculate the pwm divisor on nv50+
  drm/nouveau/fan: rewrite the fan tachometer driver to get more precision, faster
  drm/nouveau/therm: move thermal-related functions to the therm subdev
  drm/nouveau/bios: parse the pwm divisor from the perf table
  drm/nouveau/therm: use the EXTDEV table to detect i2c monitoring devices
  drm/nouveau/therm: rework thermal table parsing
  drm/nouveau/gpio: expose the PWM/TOGGLE parameter found in the gpio vbios table
  drm/nouveau: fix pm initialization order
  drm/nouveau/bios: check that fixed tvdac gpio data is valid before using it
  drm/nouveau: log channel debug/error messages from client object rather than drm client
  drm/nouveau: have drm debugging macros build on top of core macros
  ...

Merge tag 'uapi-prep-20121002' of git://git.infradead.org/users/dhowells/linux-headers

2012-10-03T20:45:43+00:00

Pull preparatory patches for user API disintegration from David Howells:
 "The patches herein prepare for the extraction of the Userspace API
  bits from the various header files named in the Kbuild files.

  New subdirectories are created under either include/uapi/ or
  arch/x/include/uapi/ that correspond to the subdirectory containing
  that file under include/ or arch/x/include/.

  The new subdirs under the uapi/ directory are populated with Kbuild
  files that mostly do nothing at this time.  Further patches will
  disintegrate the headers in each original directory and fill in the
  Kbuild files as they do it.

  These patches also:

   (1) fix up #inclusions of "foo.h" rather than .

   (2) Remove some redundant #includes from the DRM code.

   (3) Make the kernel build infrastructure handle Kbuild files both in
       the old places and the new UAPI place that both specify headers
       to be exported.

   (4) Fix some kernel tools that #include kernel headers during their
       build.

  I have compile tested this with allyesconfig against x86_64,
  allmodconfig against i386 and a scattering of additional defconfigs of
  other arches.  Prepared for main script

  Signed-off-by: David Howells 
  Acked-by: Arnd Bergmann 
  Acked-by: Thomas Gleixner 
  Acked-by: Michael Kerrisk 
  Acked-by: Paul E. McKenney 
  Acked-by: Dave Jones 
  Acked-by: H. Peter Anvin "

* tag 'uapi-prep-20121002' of git://git.infradead.org/users/dhowells/linux-headers:
  UAPI: Plumb the UAPI Kbuilds into the user header installation and checking
  UAPI: x86: Differentiate the generated UAPI and internal headers
  UAPI: Remove the objhdr-y export list
  UAPI: Move linux/version.h
  UAPI: Set up uapi/asm/Kbuild.asm
  UAPI: x86: Fix insn_sanity build failure after UAPI split
  UAPI: x86: Fix the test_get_len tool
  UAPI: (Scripted) Set up UAPI Kbuild files
  UAPI: Partition the header include path sets and add uapi/ header directories
  UAPI: (Scripted) Convert #include "..." to #include  in kernel system headers
  UAPI: (Scripted) Convert #include "..." to #include  in drivers/gpu/
  UAPI: (Scripted) Remove redundant DRM UAPI header #inclusions from drivers/gpu/.
  UAPI: Refer to the DRM UAPI headers with <...> and from certain headers only