firefly-linux-kernel-4.4.55.git
9 years agodrm/msm: mdp4: Fix drm_framebuffer dereference crash
Archit Taneja [Fri, 26 Jun 2015 10:19:43 +0000 (15:49 +0530)]
drm/msm: mdp4: Fix drm_framebuffer dereference crash

mdp4_get_frame_format() can dereference a drm_framebuffer when it's NULL.
Call it in mdp4_plane_mode_set only when we know fb is non-NULL.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
9 years agodrm/msm: fix msm_gem_prime_get_sg_table()
Rob Clark [Thu, 23 Jul 2015 17:44:56 +0000 (13:44 -0400)]
drm/msm: fix msm_gem_prime_get_sg_table()

We need to return a new sgt, since the caller takes ownership of it.

Reported-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Rob Clark <robdclark@gmail.com>
9 years agoMerge tag 'drm-amdkfd-next-fixes-2015-08-05' of git://people.freedesktop.org/~gabbayo...
Dave Airlie [Fri, 14 Aug 2015 00:15:24 +0000 (10:15 +1000)]
Merge tag 'drm-amdkfd-next-fixes-2015-08-05' of git://people.freedesktop.org/~gabbayo/linux into drm-next

Two small bug fixes for the code you pulled for 4.3:

- Used a SHIFT define instead of a MASK define to check if a bit is turned on
  when destroying hqd. Luckily, this is in gfx7 interface file with amdgpu,
  which was used only for bring-up purposes of amdgpu, so no real effect on
  a running system

- Used a logical AND instead of a bitwise AND operator, when initializing
  sdma virtual memory when using SDMA queues

* tag 'drm-amdkfd-next-fixes-2015-08-05' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdkfd: fix bug when initializing sdma vm
  drm/amdgpu: fix bug when amdkfd destroys hqd

9 years agoMerge branch 'drm-sti-next-atomic-2015-08-11' of http://git.linaro.org/people/benjami...
Dave Airlie [Fri, 14 Aug 2015 00:14:23 +0000 (10:14 +1000)]
Merge branch 'drm-sti-next-atomic-2015-08-11' of git.linaro.org/people/benjamin.gaignard/kernel into drm-next

This serie of patches fix minor bugs around how driver sub-components are
bind and planes z-ordering.
The main part is about atomic support: using more atomic helpers allow us
to simplify the code (~300 lines removed) and to ahve a better match between
drm concepts (planes and crtc) and hardware split.

[airlied: fixed up conflict in atomic code]

* 'drm-sti-next-atomic-2015-08-11' of http://git.linaro.org/people/benjamin.gaignard/kernel:
  drm/sti: atomic crtc/plane update
  drm/sti: rename files and functions
  drm/sti: code clean up
  drm/sti: fix dynamic z-ordering
  drm: sti: fix sub-components bind

9 years agoMerge tag 'topic/drm-misc-2015-08-13' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 14 Aug 2015 00:02:21 +0000 (10:02 +1000)]
Merge tag 'topic/drm-misc-2015-08-13' of git://anongit.freedesktop.org/drm-intel into drm-next

Final drm-misc pull for 4.3:
- fbdev emulation Kconfig option for everyone thanks to Archit. It's not
  everything yet bit this is fairly tricky since it spawns all drivers.
- vgaarb & vgaswitcheroo polish from Thierry
- some drm_irq.c cleanups (Thierry)
- struct_mutex crusade from me
- more fbdev panic handling removal
- various things all over in drm core&helpers

* tag 'topic/drm-misc-2015-08-13' of git://anongit.freedesktop.org/drm-intel: (65 commits)
  drm/atomic: Use KMS VBLANK API
  drm/irq: Document return values more consistently
  drm/irq: Make pipe unsigned and name consistent
  drm/irq: Check for valid VBLANK before dereference
  drm/irq: Remove negative CRTC index special-case
  drm/plane: Remove redundant extern
  drm/plane: Use consistent data types for format count
  vga_switcheroo: Remove unnecessary checks
  vga_switcheroo: Wrap overly long lines
  vga_switcheroo: Use pr_fmt()
  vga_switcheroo: Cleanup header comment
  vga_switcheroo: Use pr_*() instead of printk()
  vgaarb: Fix a few checkpatch errors and warnings
  vgaarb: Use vgaarb: prefix consistently in messages
  vgaarb: Stop complaining about absent devices
  drm/atomic: fix null pointer access to mode_fixup callback
  drm/i915: Use CONFIG_DRM_FBDEV_EMULATION
  drm/core: Set mode to NULL when connectors in a set drops to 0.
  drm/atomic: Call ww_acquire_done after check phase is complete
  drm/atomic: Paper over locking WARN in default_state_clear
  ...

9 years agodrm/atomic: Use KMS VBLANK API
Thierry Reding [Wed, 12 Aug 2015 15:00:35 +0000 (17:00 +0200)]
drm/atomic: Use KMS VBLANK API

Instead of using the legacy VBLANK API, use the new KMS API. This is
part of an effort to convert all existing users so that the KMS API can
be changed to properly use per-CRTC data.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/irq: Document return values more consistently
Thierry Reding [Wed, 12 Aug 2015 15:00:33 +0000 (17:00 +0200)]
drm/irq: Document return values more consistently

Some of the functions are documented inconsistently. Add Returns:
sections where missing and use consistent style to describe the return
value.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/irq: Make pipe unsigned and name consistent
Thierry Reding [Wed, 12 Aug 2015 15:00:31 +0000 (17:00 +0200)]
drm/irq: Make pipe unsigned and name consistent

Name all references to the pipe number (CRTC index) consistently to make
it easier to distinguish which is a pipe number and which is a pointer
to struct drm_crtc.

While at it also make all references to the pipe number unsigned because
there is no longer any reason why it should ever be negative.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/irq: Check for valid VBLANK before dereference
Thierry Reding [Wed, 12 Aug 2015 15:00:30 +0000 (17:00 +0200)]
drm/irq: Check for valid VBLANK before dereference

When accessing the array of per-CRTC VBLANK structures we must always
check that the index into the array is valid before dereferencing to
avoid crashing.

Signed-off-by: Thierry Reding <treding@nvidia.com>
[danvet: Squash in my own whitespace ocd fixup in drm_vblank_count.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/irq: Remove negative CRTC index special-case
Thierry Reding [Wed, 12 Aug 2015 15:00:24 +0000 (17:00 +0200)]
drm/irq: Remove negative CRTC index special-case

The drm_send_vblank_event() function treats negative CRTC indices as
meaning that a driver doesn't have proper VBLANK handling. This is the
only place where DRM needs negative CRTC indices, so in order to enable
subsequent cleanup, remove this special case and replace it by the more
obvious check for whether or not VBLANK support was initialized.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/plane: Remove redundant extern
Thierry Reding [Wed, 12 Aug 2015 14:54:29 +0000 (16:54 +0200)]
drm/plane: Remove redundant extern

Use of the extern keyword for function prototypes is unnecessary, so it
can be removed.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/plane: Use consistent data types for format count
Thierry Reding [Wed, 12 Aug 2015 14:54:28 +0000 (16:54 +0200)]
drm/plane: Use consistent data types for format count

Rather than a mix of the the sized uint32_t and signed integer, use an
unsized unsigned int to specify the format count.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovga_switcheroo: Remove unnecessary checks
Thierry Reding [Wed, 12 Aug 2015 14:32:12 +0000 (16:32 +0200)]
vga_switcheroo: Remove unnecessary checks

debugfs_remove() gracefully ignores NULL parameters, so the explicit
checks can be removed.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovga_switcheroo: Wrap overly long lines
Thierry Reding [Wed, 12 Aug 2015 14:32:11 +0000 (16:32 +0200)]
vga_switcheroo: Wrap overly long lines

Wrap overly long lines to make checkpatch happy. While at it, also add
blank lines after declarations to eliminate additional problems flagged
by checkpatch.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovga_switcheroo: Use pr_fmt()
Thierry Reding [Wed, 12 Aug 2015 14:32:10 +0000 (16:32 +0200)]
vga_switcheroo: Use pr_fmt()

Use pr_fmt() to define the "vga_switcheroo: " prefix that is prepended
to all output messages emitted by pr_*() functions. This allows making
existing strings much shorter and eliminates a bunch of warnings from
checkpatch about lines being overly long.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovga_switcheroo: Cleanup header comment
Thierry Reding [Wed, 12 Aug 2015 14:32:09 +0000 (16:32 +0200)]
vga_switcheroo: Cleanup header comment

The header comment uses a weird combination of formatting styles. Make
it consistent.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovga_switcheroo: Use pr_*() instead of printk()
Thierry Reding [Wed, 12 Aug 2015 14:32:08 +0000 (16:32 +0200)]
vga_switcheroo: Use pr_*() instead of printk()

This silences a bunch of checkpatch warnings and makes the code shorter.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovgaarb: Fix a few checkpatch errors and warnings
Thierry Reding [Wed, 12 Aug 2015 14:32:07 +0000 (16:32 +0200)]
vgaarb: Fix a few checkpatch errors and warnings

Wrap overly long lines (offending lines were mostly comments, so trivial
to fix up) and a number of other coding style issues pointed out by the
checkpatch tool.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovgaarb: Use vgaarb: prefix consistently in messages
Thierry Reding [Wed, 12 Aug 2015 14:32:06 +0000 (16:32 +0200)]
vgaarb: Use vgaarb: prefix consistently in messages

Define the pr_fmt() macro to causes all messages emitted by pr_*()
functions to be prefixed with "vgaarb: ".

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agovgaarb: Stop complaining about absent devices
Thierry Reding [Wed, 12 Aug 2015 14:32:05 +0000 (16:32 +0200)]
vgaarb: Stop complaining about absent devices

Some setups do not register a default VGA device, in which case the VGA
arbiter will still complain about the (non-existent) PCI device being a
non-VGA device.

Fix this by making the error message conditional on a default VGA device
having been set up. Note that the easy route of erroring out early isn't
going to work because otherwise priv->target won't be properly updated.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/atomic: fix null pointer access to mode_fixup callback
Inki Dae [Tue, 11 Aug 2015 12:23:49 +0000 (21:23 +0900)]
drm/atomic: fix null pointer access to mode_fixup callback

This patch fixes null pointer access incurred when
encoder driver didn't set its own mode_fixup callback.

mode_fixup callback shoudn't be called if the callback
of drm_encoder_helper_funcs is NULL.

Changelog v2:
- change it to else if

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Use CONFIG_DRM_FBDEV_EMULATION
Daniel Vetter [Mon, 10 Aug 2015 11:34:08 +0000 (13:34 +0200)]
drm/i915: Use CONFIG_DRM_FBDEV_EMULATION

Instead of our own duplicated one. This fixes a bug in the driver
unload code if DRM_FBDEV_EMULATION=n but DRM_I915_FBDEV=y because we
try to unregister the nonexistent fbdev drm_framebuffer.

Cc: Archit Taneja <architt@codeaurora.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/core: Set mode to NULL when connectors in a set drops to 0.
Maarten Lankhorst [Tue, 11 Aug 2015 07:54:59 +0000 (09:54 +0200)]
drm/core: Set mode to NULL when connectors in a set drops to 0.

Without this when a MST connector is removed drm_atomic_helper_set_config
can complain about set->mode && !set->num_connectors.

------------[ cut here ]------------
WARNING: CPU: 2 PID: 2403 at drivers/gpu/drm/drm_atomic_helper.c:1673 drm_atomic_helper_set_config+0x22e/0x420()
CPU: 2 PID: 2403 Comm: kms_flip Not tainted 4.2.0-rc5 #4233
Hardware name: NUC5i7RYB, BIOS RYBDWi35.86A.0246.2015.0309.1355 03/09/2015
 ffffffff81ac75e8 ffff88004e4ffbf8 ffffffff81714c34 0000000080000000
 0000000000000000 ffff88004e4ffc38 ffffffff8107bf81 ffff88004e4ffc48
 ffff8800d8ca0690 ffff8800d8d7a080 ffff8800d8cc2290 ffff8800d07bc9f0
Call Trace:
 [<ffffffff81714c34>] dump_stack+0x4f/0x7b
 [<ffffffff8107bf81>] warn_slowpath_common+0x81/0xc0
 [<ffffffff8107c065>] warn_slowpath_null+0x15/0x20
 [<ffffffff813d9e3e>] drm_atomic_helper_set_config+0x22e/0x420
 [<ffffffff813da174>] ? drm_atomic_helper_plane_set_property+0x84/0xc0
 [<ffffffff813ee101>] drm_mode_set_config_internal+0x61/0x100
 [<ffffffff813dc4ed>] restore_fbdev_mode+0xbd/0xe0
 [<ffffffff813de1e4>] drm_fb_helper_restore_fbdev_mode_unlocked+0x24/0x70
 [<ffffffffc0123d11>] intel_fbdev_restore_mode+0x21/0x80 [i915]
 [<ffffffffc014bf69>] i915_driver_lastclose+0x9/0x10 [i915]
 [<ffffffff813e2429>] drm_lastclose+0x29/0x130
 [<ffffffff813e2844>] drm_release+0x314/0x500
 [<ffffffff81194795>] __fput+0xe5/0x1f0
 [<ffffffff811948d9>] ____fput+0x9/0x10
 [<ffffffff810968d8>] task_work_run+0x88/0xb0
 [<ffffffff8107d53f>] do_exit+0x37f/0xa90
 [<ffffffff8127e258>] ? selinux_file_ioctl+0x48/0xc0
 [<ffffffff81277dfe>] ? security_file_ioctl+0x3e/0x60
 [<ffffffff8107ec80>] do_group_exit+0x40/0xa0
 [<ffffffff8107ecef>] SyS_exit_group+0xf/0x10
 [<ffffffff8171bdd7>] entry_SYSCALL_64_fastpath+0x12/0x6a
---[ end trace 0daf358c49351567 ]---

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/atomic: Call ww_acquire_done after check phase is complete
Daniel Vetter [Thu, 6 Aug 2015 13:06:40 +0000 (15:06 +0200)]
drm/atomic: Call ww_acquire_done after check phase is complete

We want to make sure that no one tries to acquire more locks and
states, and ww mutexes provide debug facilities for that. So use them.

v2: Only call acquire_done when ->atomic_check was successful to avoid
falling over an -EDEADLK (spotted by Maarten).

Cc: Rob Clark <robdclark@gmail.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/atomic: Paper over locking WARN in default_state_clear
Daniel Vetter [Wed, 29 Jul 2015 10:51:41 +0000 (12:51 +0200)]
drm/atomic: Paper over locking WARN in default_state_clear

In

commit 6f75cea66c8dd043ced282016b21a639af176642
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Nov 19 18:38:07 2014 +0100

    drm/atomic: Only destroy connector states with connection mutex held

I tried to fix races of atomic commits against connector
hot-unplugging. The idea is to ensure lifetimes by holding the
connection_mutex long enough. That works for synchronous commits, but
not for async ones.

For async atomic commit we really need to fix up connector lifetimes
for real. But that's a much bigger task, so just add more duct-tape:
For cleaning up connector states we currently don't need the connector
itself. So NULL it out and remove the locking check. Of course that
check was to protect the entire sequence, but the modeset itself
should be save since currently DP MST hot-removal does a dpms-off. And
that should synchronize with any outstanding async atomic commit.

Or at least that's my hope, this is all a giant mess.

Reported-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/edid: Use ARRAY_SIZE in drm_add_modes_noedid
Daniel Vetter [Mon, 10 Aug 2015 09:55:37 +0000 (11:55 +0200)]
drm/edid: Use ARRAY_SIZE in drm_add_modes_noedid

Spotted while reading code for random reasons.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/qxl: Don't take dev->struct_mutex in bo_force_delete
Daniel Vetter [Thu, 9 Jul 2015 21:32:46 +0000 (23:32 +0200)]
drm/qxl: Don't take dev->struct_mutex in bo_force_delete

It really doesn't protect anything which doesn't have other locks
already. It also doesn't seem to be wired up into the driver unload
code fwiw, but that's a different issue.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/nouveau: Don't take dev->struct_mutex in ttm_fini
Daniel Vetter [Thu, 9 Jul 2015 21:32:45 +0000 (23:32 +0200)]
drm/nouveau: Don't take dev->struct_mutex in ttm_fini

This is only called in driver load/unload paths, no need to grab any
locks at all. Also, ttm takes care of itself anyway.

Cc: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/rockchip: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:42 +0000 (23:32 +0200)]
drm/rockchip: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Aside: I stumbled over the mmap handler which directly does a
dma_mmap_attrs. But totally fails to grab a reference on the
underlying object and hence looks like it happily just leaks the ptes
since there's no guarantee the mmap isn't still around when
gem_free_object is called. Which the kerneldoc of dma_mmap_attrs
explicitly forbids.

v2: Fixup compile fail 0-day spotted.

Cc: Mark Yao <mark.yao@rock-chips.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/cma-helper: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:41 +0000 (23:32 +0200)]
drm/cma-helper: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Rob Clark <robdclark@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/cirrus: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:40 +0000 (23:32 +0200)]
drm/cirrus: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/mga200g: Hold a proper reference for cursor_set
Daniel Vetter [Thu, 9 Jul 2015 21:32:39 +0000 (23:32 +0200)]
drm/mga200g: Hold a proper reference for cursor_set

Looking up an obj, immediate dropping the acquired reference and then
continuing to use it isn't how this is supposed to work. Fix this by
holding a reference for the entire function.

While at it stop grabbing dev->struct_mutex, it doesn't protect
anything here.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/mga200g: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:38 +0000 (23:32 +0200)]
drm/mga200g: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/bochs: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:37 +0000 (23:32 +0200)]
drm/bochs: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl
Daniel Vetter [Thu, 9 Jul 2015 21:32:36 +0000 (23:32 +0200)]
drm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl

Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/gem: Be more friendly with locking checks
Daniel Vetter [Thu, 9 Jul 2015 21:32:35 +0000 (23:32 +0200)]
drm/gem: Be more friendly with locking checks

BUG_ON kills the driver, WARN_ON is much friendlier. And usually nothing
bad happens when the locking is slightly busted.

v2: Fix typos in commit message Thierry spotted.

Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Remove two-level menu in Kconfig
Thierry Reding [Fri, 7 Aug 2015 16:10:17 +0000 (18:10 +0200)]
drm: Remove two-level menu in Kconfig

The Direct Rendering Manager Kconfig option is already a separate menu,
so remove the extra level to make it easier to navigate.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Add top level Kconfig option for DRM fbdev emulation
Archit Taneja [Wed, 5 Aug 2015 06:58:57 +0000 (12:28 +0530)]
drm: Add top level Kconfig option for DRM fbdev emulation

Legacy fbdev emulation support via DRM is achieved through KMS FB helpers.
Most modesetting drivers enable provide fbdev emulation by default by
selecting KMS FB helpers. A few provide a separate Kconfig option for the
user to enable or disbale fbdev emulation.

Enabling fbdev emulation is finally a distro-level decision. Having a top
level Kconfig option for fbdev emulation helps by providing a uniform way
to enable/disable fbdev emulation for any modesetting driver. It also lets
us remove unnecessary driver specific Kconfig options that causes bloat.

With a top level Kconfig in place, we can stub out the fb helper functions
when not needed without breaking functionality. Having stub functions also
prevents drivers to require wrapping fb helper function calls with #ifdefs.

DRM_FBDEV_EMULATION defaults to y since many drivers enable fbdev
emulation by default and majority of distributions expect the fbdev
interface in the kernel.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/fb-helper: Move drm_fb_helper_force_kernel_mode() inside #ifdef
Geert Uytterhoeven [Tue, 4 Aug 2015 13:22:11 +0000 (15:22 +0200)]
drm/fb-helper: Move drm_fb_helper_force_kernel_mode() inside #ifdef

If CONFIG_MAGIC_SYSRQ is not set:

    drivers/gpu/drm/drm_fb_helper.c:390:13: warning: 'drm_fb_helper_force_kernel_mode' defined but not used [-Wunused-function]
     static bool drm_fb_helper_force_kernel_mode(void)
 ^

Move drm_fb_helper_force_kernel_mode() inside the existing #ifdef to fix
this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/fb-helper: Clarify drm_fb_helper_restore_fbdev_mode*()
Geert Uytterhoeven [Tue, 4 Aug 2015 13:22:10 +0000 (15:22 +0200)]
drm/fb-helper: Clarify drm_fb_helper_restore_fbdev_mode*()

As of commit 5ea1f752ae04be40 ("drm: add
drm_fb_helper_restore_fbdev_mode_unlocked()"),
drm_fb_helper_restore_fbdev_mode() is no longer public, and drivers
should call drm_fb_helper_restore_fbdev_mode_unlocked() from their
->lastclose callbacks instead.

Update the documentation to reflect this, and absorb the one liner
drm_fb_helper_restore_fbdev_mode() into its single caller.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrivers: gpu: Drop unlikely before IS_ERR(_OR_NULL)
Viresh Kumar [Fri, 31 Jul 2015 08:38:24 +0000 (14:08 +0530)]
drivers: gpu: Drop unlikely before IS_ERR(_OR_NULL)

IS_ERR(_OR_NULL) already contain an 'unlikely' compiler flag and there
is no need to do that again from its callers. Drop it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/virtio: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:52:01 +0000 (16:22 +0530)]
drm/virtio: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- add missing header for virtgpu_fb.c

Cc: David Airlie <airlied@linux.ie>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/amdgpu: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:52:00 +0000 (16:22 +0530)]
drm/amdgpu: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- Fixed PTR_ERR issue mentioned by kbuild bot

Cc: Fengguang Wu <fengguang.wu@intel.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Oded Gabbay <oded.gabbay@gmail.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/bochs: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:59 +0000 (16:21 +0530)]
drm/bochs: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- remove unused variable device in bochsfb_create

Cc: David Airlie <airlied@linux.ie>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/nouveau: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:57 +0000 (16:21 +0530)]
drm/nouveau: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- remove unused variable pdev in nouveau_fbcon_create

Cc: David Airlie <airlied@linux.ie>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:56 +0000 (16:21 +0530)]
drm/i915: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- No changes

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/radeon: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:54 +0000 (16:21 +0530)]
drm/radeon: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- Fix build break because of missing include of drm_fb_helper in
  radeon_drv.c

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/mgag200: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:53 +0000 (16:21 +0530)]
drm/mgag200: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- remove unused goto label 'out'

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/omap: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:48 +0000 (16:21 +0530)]
drm/omap: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v3:
- Update error handling for new drm_fb_helper funcs. Check using IS_ERR()
  instead of checking for NULL.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
v2:
- No changes

Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/cirrus: Use new drm_fb_helper functions
Archit Taneja [Fri, 31 Jul 2015 10:51:44 +0000 (16:21 +0530)]
drm/cirrus: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly.

v3:
- Don't touch remove_conflicting_framebuffers

v2:
- Remove stray goto label out_iounmap

Cc: Thierry Reding <treding@nvidia.com>
Cc: Zach Reizner <zachr@google.com>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Fixup locking WARNINGs in drm_mode_config_reset
Daniel Vetter [Wed, 29 Jul 2015 06:32:43 +0000 (08:32 +0200)]
drm: Fixup locking WARNINGs in drm_mode_config_reset

With

commit 7a3f3d6667f5f9ffd1517f6b21d64bbf5312042c
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jul 9 23:44:28 2015 +0200

    drm: Check locking in drm_for_each_connector

we started checking the locking in drm_for_each_connector but somehow
I totally missed drm_mode_config_reset. There's no problem there since
this function should only be called in single-threaded contexts
(driver load or resume), so just wrap the loop with the right lock.

v2: Drink coffee and all that ...

Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Remove __drm_modeset_lock_all
Daniel Vetter [Tue, 28 Jul 2015 11:18:42 +0000 (13:18 +0200)]
drm: Remove __drm_modeset_lock_all

The last user is gone, no need for trylocking any more in this legacy
helper.

Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/fb-helper: Stop using trylocks in force_restore
Daniel Vetter [Tue, 28 Jul 2015 11:18:41 +0000 (13:18 +0200)]
drm/fb-helper: Stop using trylocks in force_restore

Since the panic handling is gone this is only used for force-restoring
the fbdev/fbcon from sysrq, and that's done with a work item. No need
any more to do trylocks, we can just do normal locking.

Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/fbdev: Return -EBUSY when oopsing
Daniel Vetter [Tue, 28 Jul 2015 11:18:40 +0000 (13:18 +0200)]
drm/fbdev: Return -EBUSY when oopsing

Trying to do anything with kms drivers when oopsing has become a
failing proposition. But since we can end up in the fbdev code simply
due to the console unblanking that's done unconditionally just
removing our panic handler isn't enough. We need to block all fbdev
callbacks when oopsing.

There was already one in the blank handler, but it failed silently.
That makes it impossible for drivers (like i915) who subclass these
functions to figure this out.

Instead consistently return -EBUSY so that everyone knows that we
really don't want to be bothered right now. This also allows us to
remove a pile of FIXMEs from the i915 fbdev code (since due to the
failure code they now won't attempt to grab dangerous locks any more).

Cc: Dave Airlie <airlied@gmail.com>
Cc: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/fb_cma_helper: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:20 +0000 (14:58 +0530)]
drm/fb_cma_helper: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/udl: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:16 +0000 (14:58 +0530)]
drm/udl: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v2:
- remove unused variable device in udlfb_create

Cc: David Airlie <airlied@linux.ie>
Cc: Haixia Shi <hshi@chromium.org>
Cc: "Stéphane Marchesin" <marcheu@chromium.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/qxl: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:13 +0000 (14:58 +0530)]
drm/qxl: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cc: David Airlie <airlied@linux.ie>
Cc: Frediano Ziglio <fziglio@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/gma500: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:10 +0000 (14:58 +0530)]
drm/gma500: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v2:
- removed unused variable 'device' in psbfb_create

Cc: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/exynos: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:09 +0000 (14:58 +0530)]
drm/exynos: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v2:
- Remove unnecessary dealloc cmap in error handling path

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/msm: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:08 +0000 (14:58 +0530)]
drm/msm: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Stephane Viau <sviau@codeaurora.org>
Cc: Hai Li <hali@codeaurora.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/tegra: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:07 +0000 (14:58 +0530)]
drm/tegra: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

v2:
- Fix up error handling path in tegra_fbdev_probe

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: "Terje Bergström" <tbergstrom@nvidia.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/ast: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:05 +0000 (14:58 +0530)]
drm/ast: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cleaned up the error handling in astfb_create a bit.

v2:
- removed unused variable 'device' in astfb_create

Cc: David Airlie <airlied@linux.ie>
Cc: "Y.C. Chen" <yc_chen@aspeedtech.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/armada: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:04 +0000 (14:58 +0530)]
drm/armada: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/rockchip: Use new drm_fb_helper functions
Archit Taneja [Wed, 22 Jul 2015 09:28:03 +0000 (14:58 +0530)]
drm/rockchip: Use new drm_fb_helper functions

Use the newly created wrapper drm_fb_helper functions instead of calling
core fbdev functions directly. They also simplify the fb_info creation.

This is an effort to create a top level drm fbdev emulation option.

Cc: Mark Yao <mark.yao@rock-chips.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/fb_helper: Create a wrapper for fb_set_suspend
Archit Taneja [Fri, 31 Jul 2015 10:51:43 +0000 (16:21 +0530)]
drm/fb_helper: Create a wrapper for fb_set_suspend

Some drm drivers call fb_set_suspend. Create a drm_fb_helper function
that wraps around these calls.

This is part of an effort to prevent drm drivers from calling fbdev
functions directly, in order to make fbdev emulation a top level drm
option.

v3:
- Fixed kerneldoc errors

v2:
- Added kerneldocs
- Added a check for non-NULL fb_helper before proceeding. This will
  make the helpers work when we have a module param for fbdev emulation
- Follow the drm way of aligning of arguments in func definitions

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/fb_helper: Create wrappers for blit, copyarea and fillrect funcs
Archit Taneja [Fri, 31 Jul 2015 10:51:42 +0000 (16:21 +0530)]
drm/fb_helper: Create wrappers for blit, copyarea and fillrect funcs

drm drivers that emulate fbdev populate their fb_fillrect, fb_copyarea
and fb_imageblit fb_ops with the help of cfb_* or sys_* fbdev core
helper functions.

Create drm_fb_helper functions that wrap around these calls.

This is part of an effort to prevent drm drivers from calling fbdev
functions directly, in order to make fbdev emulation a top level drm
option.

v3:
- Fixed kerneldoc errors

v2:
- Added kerneldocs
- Follow the drm way of aligning of arguments in func definitions
- Remove unnecessary checks for non NULL fb_info

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/fb_helper: Create wrappers for fb_sys_read/write funcs
Archit Taneja [Fri, 31 Jul 2015 10:51:41 +0000 (16:21 +0530)]
drm/fb_helper: Create wrappers for fb_sys_read/write funcs

Some drm drivers populate their fb_ops with fb_sys_read/write fb sysfs
ops.

Create a drm_fb_helper function that wraps around these calls.

This is part of an effort to prevent drm drivers from calling fbdev
functions directly, in order to make fbdev emulation a top level drm
option.

v3:
- Fix kerneldoc errors

v2:
- Added kerneldocs
- Follow the drm way of aligning of arguments in func definitions
- Remove unnecessary checks for non NULL fb_info

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/fb_helper: Create a wrapper for unlink_framebuffer
Archit Taneja [Wed, 22 Jul 2015 09:27:57 +0000 (14:57 +0530)]
drm/fb_helper: Create a wrapper for unlink_framebuffer

Some drm drivers call unlink_framebuffer. Create a drm_fb_helper function
that wraps around these calls.

This is part of an effort to prevent drm drivers from calling fbdev
functions directly, in order to make fbdev emulation a top level drm
option.

v2:
- Added kerneldocs
- Added a check for non-NULL fb_helper before proceeding. This will
  make the helpers work when we have a module param for fbdev emulation

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/fb_helper: Add drm_fb_helper functions to manage fb_info creation
Archit Taneja [Wed, 22 Jul 2015 09:27:56 +0000 (14:57 +0530)]
drm/fb_helper: Add drm_fb_helper functions to manage fb_info creation

Every drm driver calls framebuffer_alloc, fb_alloc_cmap,
unregister_framebuffer, fb_dealloc_cmap and framebuffer_release in
order to emulate fbdev support.

Create drm_fb_helper functions that perform the above operations.

This is part of an effort to prevent drm drivers from calling fbdev
functions directly. It also removes repetitive code from drivers.

There are some drivers that call alloc_apertures after framebuffer_alloc
and some that don't. Make the helper always call alloc_apertures. This
would make certain drivers allocate memory for apertures but not use
them. Since it's a small amount of memory, it shouldn't be an issue.

v2:
- Added kerneldocs
- Added a check for non-NULL fb_helper before proceeding. This will
  make the helpers work when we have a module param for fbdev emulation

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/omap: Fixup compile fail
Daniel Vetter [Thu, 6 Aug 2015 12:09:35 +0000 (14:09 +0200)]
drm/omap: Fixup compile fail

Maarten didn't fully test his patches on all drm drivers and
apparently missed a few places when grepping.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/sti: atomic crtc/plane update
Vincent Abriou [Mon, 3 Aug 2015 12:22:16 +0000 (14:22 +0200)]
drm/sti: atomic crtc/plane update

Better fit STI hardware structure.
Planes are no more responsible of updating mixer information such
as z-order and status. It is now up to the CRTC atomic flush to
do it. Plane actions (enable or disable) are performed atomically.
Disabling of a plane is synchronize with the vsync event.

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
9 years agodrm/sti: rename files and functions
Vincent Abriou [Fri, 31 Jul 2015 09:32:34 +0000 (11:32 +0200)]
drm/sti: rename files and functions

replace all "sti_drm_" occurences by "sti_"

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
9 years agodrm/sti: code clean up
Vincent Abriou [Fri, 31 Jul 2015 09:32:13 +0000 (11:32 +0200)]
drm/sti: code clean up

Purpose is to simplify the STI driver:
- remove layer structure
- consider video subdev as part of the compositor (like mixer subdev)
- remove useless STI_VID0 and STI_VID1 enum

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
9 years agodrm/sti: fix dynamic z-ordering
Vincent Abriou [Fri, 31 Jul 2015 09:31:38 +0000 (11:31 +0200)]
drm/sti: fix dynamic z-ordering

Apply the plane depth when the plane is updated.
If the depth is different from the previous plane update,
the register controlling the plane depth is cleaned and updated
with the new depth.

Signed-off-by: Vincent Abriou <vincent.abriou@st.com>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
9 years agodrm: sti: fix sub-components bind
Benjamin Gaignard [Fri, 17 Jul 2015 10:06:11 +0000 (12:06 +0200)]
drm: sti: fix sub-components bind

Fix misunderstanding in how use component framework.
drm_platform_init() is now call only when all the
sub-components are register themselves instead of the
previous broken two stages mechanism.

Update bindings documentation.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
9 years agodrm/amdkfd: fix bug when initializing sdma vm
Oded Gabbay [Wed, 29 Jul 2015 07:40:26 +0000 (10:40 +0300)]
drm/amdkfd: fix bug when initializing sdma vm

A logical AND operation was used during mask and shift, instead of a
bitwise AND operation. This patch fixes this bug by changing the
operation to bitwise AND.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
9 years agodrm/amdgpu: fix bug when amdkfd destroys hqd
Oded Gabbay [Wed, 29 Jul 2015 07:33:06 +0000 (10:33 +0300)]
drm/amdgpu: fix bug when amdkfd destroys hqd

The wrong define was used to check if the hqd is still active

v2: Don't use SHIFT as the MASK is already shifted

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
9 years agoMerge tag 'topic/drm-misc-2015-07-28' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Thu, 30 Jul 2015 02:45:11 +0000 (12:45 +1000)]
Merge tag 'topic/drm-misc-2015-07-28' of git://anongit.freedesktop.org/drm-intel into drm-next

More drm-misc, mostly fine-tuning of atomic helpers. They're mostly
driver-wide interface changes of the helpers and I need them for i915
work, so I plan to pull this tag into drm-intel-next too.

* tag 'topic/drm-misc-2015-07-28' of git://anongit.freedesktop.org/drm-intel:
  drm/atomic: Update legacy DPMS state during modesets, v3.
  drm: Make the connector dpms callback return a value, v2.
  drm/atomic: pass old crtc state to atomic_begin/flush.
  drm/atomic: add connectors_changed to separate it from mode_changed, v2
  drm: Fix DP_TEST_COUNT_MASK

9 years agodrm/atomic: Update legacy DPMS state during modesets, v3.
Maarten Lankhorst [Mon, 27 Jul 2015 11:24:29 +0000 (13:24 +0200)]
drm/atomic: Update legacy DPMS state during modesets, v3.

This is required for DPMS to work correctly, during a modeset
the DPMS property should be turned off, unless the state is
crtc is made active in which case it should be set to DPMS on.

Changes since v1:
- Set DPMS to off when a connector is removed from a crtc too.
- Update the legacy dpms property too.
- Add an exception for the legacy dpms paths, it updates its own state.
Changes since v2:
- Do not preserve dpms property.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Make the connector dpms callback return a value, v2.
Maarten Lankhorst [Tue, 21 Jul 2015 09:34:55 +0000 (11:34 +0200)]
drm: Make the connector dpms callback return a value, v2.

This is required to properly handle failing dpms calls.
When making a wait in i915 interruptible, I've noticed
that the dpms sequence could fail with -ERESTARTSYS because
it was waiting interruptibly for flips. So from now on
allow drivers to fail in their connector dpms callback.

Encoder and crtc dpms callbacks are unaffected.

Changes since v1:
- Update kerneldoc for the drm helper functions.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
[danvet: Resolve conflicts due to different merge order.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/atomic: pass old crtc state to atomic_begin/flush.
Maarten Lankhorst [Tue, 21 Jul 2015 11:28:58 +0000 (13:28 +0200)]
drm/atomic: pass old crtc state to atomic_begin/flush.

In intel it's useful to keep track of some state changes with old
crtc state vs new state, for example to disable initial planes or
when a modeset's prevented during fastboot.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
[danvet: squash in fixup for exynos provided by Maarten.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/atomic: add connectors_changed to separate it from mode_changed, v2
Maarten Lankhorst [Tue, 21 Jul 2015 11:28:57 +0000 (13:28 +0200)]
drm/atomic: add connectors_changed to separate it from mode_changed, v2

This can be a separate case from mode_changed, when connectors stay the
same but only the mode is different. Drivers may choose to implement specific
optimizations to prevent a full modeset for this case.

Changes since v1:
- Update kerneldocs slightly.

Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm: Fix DP_TEST_COUNT_MASK
Rodrigo Vivi [Thu, 23 Jul 2015 23:34:58 +0000 (16:34 -0700)]
drm: Fix DP_TEST_COUNT_MASK

By Vesa's DP 1.2 Spec this counter has 4 bits [3:0].

This mask is wrong since when the counter was introduced by myself
on commit ad9dc91b6e21266bfc6f466db4b95e10211f31ee
Author: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Date:   Tue Sep 16 19:18:12 2014 -0400

    drm/i915: Fix Sink CRC

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Sivakumar Thulasimani <sivakumar.thulasimani@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoMerge tag 'topic/connector-locking-2015-07-23' of git://anongit.freedesktop.org/drm...
Dave Airlie [Fri, 24 Jul 2015 04:30:29 +0000 (14:30 +1000)]
Merge tag 'topic/connector-locking-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next

connector hotplug locking cleanup and fixes to make it save against
atomic. Note that because of depencies this is based on top of the
drm-intel-next pull, so that one needs to go in before this one.

I've also thrown in the mode_group removal on top since it's defunct,
never worked really, no one seems to care and the code can be resurrected
easily.

* tag 'topic/connector-locking-2015-07-23' of git://anongit.freedesktop.org/drm-intel:
  drm: gc now dead mode_group code
  drm: Stop filtering according to mode_group in getresources
  drm: Roll out drm_for_each_{plane,crtc,encoder}
  drm/cma-helper: Fix locking in drm_fb_cma_debugfs_show
  drm: Roll out drm_for_each_connector more
  drm: Amend connector list locking rules
  drm/radeon: Take all modeset locks for DP MST hotplug
  drm/i915: Take all modeset locks for DP MST hotplug
  drm: Check locking in drm_for_each_fb
  drm/i915: Use drm_for_each_fb in i915_debugfs.c
  drm: Check locking in drm_for_each_connector
  drm/fbdev-helper: Grab mode_config.mutex in drm_fb_helper_single_add_all_connectors
  drm/probe-helper: Grab mode_config.mutex in poll_init/enable
  drm: Add modeset object iterators
  drm: Simplify drm_for_each_legacy_plane arguments

9 years agoMerge tag 'topic/crc-pmic-2015-07-23' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 24 Jul 2015 04:30:04 +0000 (14:30 +1000)]
Merge tag 'topic/crc-pmic-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next

crystalcove pmic support from Shobhit. Patch series has all acks/r-bs from
other mainainers so ok to pull into drm-next. But I'm cc'ing all other
maintainers as fyi and in case they want to pull it into their trees too
to avoid conflicts.

* tag 'topic/crc-pmic-2015-07-23' of git://anongit.freedesktop.org/drm-intel:
  mfd: Add GPIOLIB dependency if INTEL_SOC_PMIC is to be enabled
  drm/i915: Backlight control using CRC PMIC based PWM driver
  drm/i915: Use the CRC gpio for panel enable/disable
  pwm: crc: Add Crystalcove (CRC) PWM driver
  mfd: intel_soc_pmic_core: ADD PWM lookup table for CRC PMIC based PWM
  mfd: intel_soc_pmic_crc: Add PWM cell device for Crystalcove PMIC
  mfd: intel_soc_pmic_core: Add lookup table for Panel Control as GPIO signal
  gpiolib: Add support for removing registered consumer lookup table

9 years agoMerge tag 'drm-intel-next-2015-07-17' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 24 Jul 2015 04:29:06 +0000 (14:29 +1000)]
Merge tag 'drm-intel-next-2015-07-17' of git://anongit.freedesktop.org/drm-intel into drm-next

- prelim hw support dropped for skl after Damien fixed an ABI issue around
  planes
- legacy modesetting is done using atomic infrastructure now (Maarten)!
- more gen9 workarounds (Arun&Nick)
- MOCS programming (cache control for better performance) for skl/bxt
- vlv/chv dpll improvements (Ville)
- PSR fixes from Rodrigo
- fbc improvements from Paulo
- plumb requests into execlist submit functions (Mika)
- opregion code cleanup from Jani
- resource streamer support from Abdiel for mesa
- final fixes for 12bpc hdmi + enabling support from Ville
drm-intel-next-2015-07-03:
- dsi improvements (Gaurav)
- bxt ddi dpll hw state readout (Imre)
- chv dvfs support and overall wm improvements for both vlv and chv (Ville)
- ppgtt polish from Mika and Michel
- cdclk support for bxt (Bob Pauwe)
- make frontbuffer tracking more precise
- OLR removal (John Harrison)
- per-ctx WA batch buffer support (Arun Siluvery)
- remvoe KMS Kconfig option (Chris)
- more hpd handling refactoring from Jani
- use atomic states throughout modeset code and integrate with atomic plane
  update (Maarten)
drm-intel-next-2015-06-19:
- refactoring hpd irq handlers (Jani)
- polish skl dpll code a bit (Damien)
- dynamic cdclk adjustement (Ville & Mika)
- fix up 12bpc hdmi and enable it for real again (Ville)
- extend hsw cmd parser to be useful for atomic configuration (Franscico Jerez)
- even more atomic conversion and rolling state handling out across modeset code
  from Maarten & Ander
- fix DRRS idleness detection (Ramalingam)
- clean up dsp address alignment handling (Ville)
- some fbc cleanup patches from Paulo
- prevent hard-hangs when trying to reset the gpu on skl (Mika)

* tag 'drm-intel-next-2015-07-17' of git://anongit.freedesktop.org/drm-intel: (386 commits)
  drm/i915: Update DRIVER_DATE to 20150717
  drm/i915/skl: Drop the preliminary_hw_support flag
  drm/i915/skl: Don't expose the top most plane on gen9 display
  drm/i915: Fix divide by zero on watermark update
  drm/i915: Invert fastboot check
  drm/i915: Clarify logic for initial modeset
  drm/i915: Unconditionally check gmch pfit state
  drm/i915: always disable irqs in intel_pipe_update_start
  drm/i915: Remove use of runtime pm in atomic commit functions
  drm/i915: Call plane update functions directly from intel_atomic_commit.
  drm/i915: Use full atomic modeset.
  drm/i915/gen9: Add WaSetDisablePixMaskCammingAndRhwoInCommonSliceChicken
  drm/i915/gen9: Add WaFlushCoherentL3CacheLinesAtContextSwitch workaround
  drm/i915/gen9: Add WaDisableCtxRestoreArbitration workaround
  drm/i915: Enable WA batch buffers for Gen9
  drm/i915/gen9: Implement WaDisableKillLogic for gen 9
  drm/i915: Use expcitly fixed type in compat32 structs
  drm/i915: Fix noatomic crtc disabling, v2.
  drm/i915: fill in more mode members
  drm/i915: Added BXT check in HAS_CORE_RING_FREQ macro
  ...

9 years agoMerge tag 'topic/drm-misc-2015-07-23' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 24 Jul 2015 04:28:16 +0000 (14:28 +1000)]
Merge tag 'topic/drm-misc-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next

Update drm-misc pull request since the first one didn't go in yet. Few
atomic helper patches, rejecting some old dri1 crap for modern drivers and
a few trivial things on top.

* tag 'topic/drm-misc-2015-07-23' of git://anongit.freedesktop.org/drm-intel:
  drm/mgag200: remove unneeded variable
  drm/mgag200: remove unused variables
  drm/atomic: Only update crtc->x/y if it's part of the state, v2.
  drm/fb: drop panic handling
  drm: Fix warning with make xmldocs caused by drm_irq.c
  drm/gem: rip out drm vma accounting for gem mmaps
  drm/fourcc: Add formats R8, RG88, GR88
  drm/atomic: Cleanup on error properly in the atomic ioctl.
  drm: Update plane->fb also for page_flip
  drm: remove redundant code form drm_ioc32.c
  drm: reset empty state in transitional helpers
  drm/crtc-helper: Fixup error handling in drm_helper_crtc_mode_set
  drm/atomic: Update old_fb after setting a property.
  drm: Remove useless blank line
  drm: Reject DRI1 hw lock ioctl functions for kms drivers
  drm: Convert drm_legacy_ctxbitmap_init to void return type
  drm: Turn off Legacy Context Functions

9 years agoMerge tag 'drm-amdkfd-next-2015-07-20' of git://people.freedesktop.org/~gabbayo/linux...
Dave Airlie [Fri, 24 Jul 2015 04:26:53 +0000 (14:26 +1000)]
Merge tag 'drm-amdkfd-next-2015-07-20' of git://people.freedesktop.org/~gabbayo/linux into drm-next

- Add Carrizo support for amdkfd, using the new amdgpu driver as the relevant
  kgd. The support includes interfaces with amdgpu both for gfx7 (Kaveri) and
  gfx8 (Carrizo). However, gfx7 interface is used for debugging purposes only,
  so amdkfd defaults to using radeon when Kaveri is installed.

I would like to note that no new IOCTLs are being introduced, and there is no
change in the current IOCTLs, as they are suited both for gfx7 and gfx8.

* tag 'drm-amdkfd-next-2015-07-20' of git://people.freedesktop.org/~gabbayo/linux:
  drm/amdkfd: Set correct doorbell packet type for Carrizo
  drm/amdkfd: Use generic defines in new amd headers
  drm/amdkfd: Implement create_map_queues() for Carrizo
  drm/amdkfd: fix runlist length calculation
  drm/amdkfd: Add support for VI in DQM
  drm/amdkfd: add support for VI in MQD manager
  drm/amdkfd: add CP HWS packet headers for VI
  drm/amdkfd: add supported CZ devices PCI IDs to amdkfd
  drm/amdkfd: Add dependency of DRM_AMDGPU to Kconfig
  drm/amdgpu: Add amdgpu <--> amdkfd gfx8 interface
  drm/amdgpu: add amdgpu <--> amdkfd gfx7 interface
  drm/amdgpu: Add H/W agnostic amdgpu <--> amdkfd interface
  drm/radeon: Modify kgd_engine_type enum to match CZ

9 years agodrm: gc now dead mode_group code
Daniel Vetter [Thu, 9 Jul 2015 21:44:37 +0000 (23:44 +0200)]
drm: gc now dead mode_group code

Two nice things here:
- drm_dev_register will truly register everything in the right order
  if the driver doesn't have a ->load callback. Before this we had to
  init the primary mode_group after the device nodes where already
  registered.

- Less things to keep track of when reworking the connector locking,
  yay!

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Stop filtering according to mode_group in getresources
Daniel Vetter [Thu, 9 Jul 2015 21:44:36 +0000 (23:44 +0200)]
drm: Stop filtering according to mode_group in getresources

It's been dead code since forever since mode groups haven't ever been
implemented. On top of that it's also been non-functional since we
only ever filtered the getresources ioctl and not any of the others
nor the mode object lookup code.

Given overwhelming evidence it looks like this isn't a feature we
need, hence remove it.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Roll out drm_for_each_{plane,crtc,encoder}
Daniel Vetter [Thu, 9 Jul 2015 21:44:35 +0000 (23:44 +0200)]
drm: Roll out drm_for_each_{plane,crtc,encoder}

Remaining manual work in the drm core&helpers. Nothing special here,
no surprises.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/cma-helper: Fix locking in drm_fb_cma_debugfs_show
Daniel Vetter [Thu, 9 Jul 2015 21:32:34 +0000 (23:32 +0200)]
drm/cma-helper: Fix locking in drm_fb_cma_debugfs_show

This function takes two locks, both of them the wrong ones. This
wasn't an oversight from my fb locking rework since both patches
landed in parallel. We really only need fb_lock when walking that
list, since everything we can reach from that is refcounted properly
already.

v2: Drop unused dev spotted by 0day.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Roll out drm_for_each_connector more
Daniel Vetter [Thu, 9 Jul 2015 21:44:34 +0000 (23:44 +0200)]
drm: Roll out drm_for_each_connector more

Now that we also grab the connection_mutex and so fixed the race with
atomic modeset we can use the iterator there too.

The other special case is drm_connector_unplug_all which would have a
locking inversion with the sysfs store/show functions if we'd grab the
mode_config.mutex around the unplug. We could just grab
connection_mutex instead, but that's a bit too much a dirty trick for
my taste. Also it's only used by udl, which doesn't do any other kind
of connector hotplugging, so should be race-free. Hence just stick
with a comment for now.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Amend connector list locking rules
Daniel Vetter [Thu, 9 Jul 2015 21:44:33 +0000 (23:44 +0200)]
drm: Amend connector list locking rules

Now that dp mst hotplug takes all locks we can amend the locking rules
for the iterators. This is needed before we can roll these out in the
atomic code to avoid getting burried in WARNINGs.

v2: Rebase onto the extracted list locking assert and add a comment to
explain the rules.

v3: Fixup German->English translation fail in the comment.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/radeon: Take all modeset locks for DP MST hotplug
Daniel Vetter [Thu, 9 Jul 2015 21:44:32 +0000 (23:44 +0200)]
drm/radeon: Take all modeset locks for DP MST hotplug

Similar with the i915 take all modeset locks for mst hotplug. This is
needed to make sure radeon holds both mode_config.mutex and
mode_config.connection_mutex when updating the connector_list, which
is the new (interim) locking regime we want for that.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Take all modeset locks for DP MST hotplug
Daniel Vetter [Thu, 9 Jul 2015 21:44:31 +0000 (23:44 +0200)]
drm/i915: Take all modeset locks for DP MST hotplug

While auditing various users of the connector/encoder lists I realized
that the atomic code is a very prolific user of them. And it only ever
grabs the mode_config->connection_mutex, but not the
mode_config->mutex like all the other code walking encoder/connector
lists.

The problem is that we can't grab the mode_config.mutex late in atomic
code since that would lead to locking inversions. And we don't want to
grab it unconditionally like the legacy set_config modeset path since
that would render all the fine-grained locking moot.

Instead just grab more locks in the dp mst hotplug code. Note that
drm_connector_init (which is the one adding the connector to these
lists) already uses drm_modeset_lock_all.

The other reason for grabbing all locks is that the dpms off in the
unplug function amounts to a modeset, so better to take all required
locks for that.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Check locking in drm_for_each_fb
Daniel Vetter [Thu, 9 Jul 2015 21:44:30 +0000 (23:44 +0200)]
drm: Check locking in drm_for_each_fb

Ever since framebuffers are reference counted we have a special lock
for the global fb list. Make sure users of that list do hold that
lock when using the new iterators.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Use drm_for_each_fb in i915_debugfs.c
Daniel Vetter [Fri, 10 Jul 2015 17:02:51 +0000 (19:02 +0200)]
drm/i915: Use drm_for_each_fb in i915_debugfs.c

Just so I have a user for this macro.

v2: Use the right macro - somehow I thought gcc should scream at me,
but list_for_each isn't really typesafe unfortunately. Spotted by
Ville.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm: Check locking in drm_for_each_connector
Daniel Vetter [Thu, 9 Jul 2015 21:44:28 +0000 (23:44 +0200)]
drm: Check locking in drm_for_each_connector

Because of DP MST connectors can now be hotplugged and we must hold
the right lock when walking the connector lists.  Enforce this by
checking the locking in our shiny new list walking macros.

v2: Extract the locking check into a small static inline helper to
help readability. This will be more important when we make the
read list access rules more complicated in later patches. Inspired by
comments from Chris. Unfortunately, due to header loops around the
definition of struct drm_device the function interface is a bit funny.

v3: Encoders aren't hotadded/removed. For each dp mst encoder we
statically create one fake encoder per pipe so that we can support as
many mst sinks as the hw can (Dave).

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Airlie <airlied@redhat.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/fbdev-helper: Grab mode_config.mutex in drm_fb_helper_single_add_all_connectors
Daniel Vetter [Thu, 9 Jul 2015 21:44:27 +0000 (23:44 +0200)]
drm/fbdev-helper: Grab mode_config.mutex in drm_fb_helper_single_add_all_connectors

This is now truly only duct-tape to keep locking checks happy since
calling this function when hpd or polling are already enabled is a
bug. The fbdev helper can't cope with hotplug changes yet at this
point, only after that.

Otoh a bit more robustness in this function can't hurt, and with this
fbdev can actually cope with hotplug changes. And it's also more
consistent with the connector hotadd/remove dp mst needs to do.
Therefore document this as new official behavior.

Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>