platform/kernel/linux-rpi.git
8 years agodrm/panel: simple: Add support for TPK U.S.A. LLC Fusion 7" and 10.1" panels
Bhuvanchandra DV [Thu, 5 May 2016 06:17:07 +0000 (11:47 +0530)]
drm/panel: simple: Add support for TPK U.S.A. LLC Fusion 7" and 10.1" panels

Add support for TPK U.S.A. LLC Fusion 7", 10.1" panels to the DRM simple
panel driver.

Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodrm/bridge: Add Analogix anx78xx support
Enric Balletbo i Serra [Mon, 2 May 2016 07:54:26 +0000 (09:54 +0200)]
drm/bridge: Add Analogix anx78xx support

Although there are other chips from the same family that can reuse this
driver, at the moment we only tested ANX7814 chip.

The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter
designed for portable devices. This driver adds initial support for HDMI
to DP pass-through mode.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Daniel Kurtz <djkurtz@chromium.org>
Cc: Nicolas Boichat <drinkcat@chromium.org>
Cc: Thierry Reding <treding@nvidia.com>
[treding@nvidia.com: coding style, propagate regulator_get() errors]
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodevicetree: Add ANX7814 SlimPort transmitter binding
Enric Balletbo i Serra [Mon, 2 May 2016 07:54:25 +0000 (09:54 +0200)]
devicetree: Add ANX7814 SlimPort transmitter binding

The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter
designed for portable devices.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agoof: Add vendor prefix for Analogix Semiconductor
Enric Balletbo i Serra [Mon, 2 May 2016 07:54:24 +0000 (09:54 +0200)]
of: Add vendor prefix for Analogix Semiconductor

Analogix Semiconductor Inc. develops analog and mixed-signal devices for
digital media and communications interconnect applications.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodrm/dp: Add define to set 0.5% down-spread in MAX_DOWNSPREAD register
Enric Balletbo i Serra [Mon, 2 May 2016 07:54:23 +0000 (09:54 +0200)]
drm/dp: Add define to set 0.5% down-spread in MAX_DOWNSPREAD register

Support of 0.5% down-spread is required for DisplayPort Specification
Version 1.1 Sink.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
[treding@nvidia.com: rename to DP_MAX_DOWNSPREAD_0_5]
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodrm/panel: simple: Add support for Innolux AT070TN92
Riccardo Bortolato [Wed, 20 Apr 2016 13:37:15 +0000 (15:37 +0200)]
drm/panel: simple: Add support for Innolux AT070TN92

Add support for the Innolux AT070TN92 panel.

Signed-off-by: Riccardo Bortolato <bortolato@navaltechitalia.it>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodrm/panel: simple: Remove useless drm_mode_set_name()
Boris Brezillon [Thu, 30 Apr 2015 14:38:36 +0000 (16:38 +0200)]
drm/panel: simple: Remove useless drm_mode_set_name()

drm_display_mode_from_videomode() already calls drm_mode_set_name() on
the provided mode.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
[treding@nvidia.com: slightly reword commit message]
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodrm/panel: simple: Set appropriate mode type
Boris Brezillon [Fri, 15 Apr 2016 16:23:33 +0000 (18:23 +0200)]
drm/panel: simple: Set appropriate mode type

All modes exposed by simple panels should be tagged as driver defined
modes. Moreover, if a panel supports only one mode, this mode is
obviously the preferred one.

Doing this also fix a problem occurring when a 'video=' parameter is
passed on the kernel command line. In some cases the user provided mode
will be preferred over the simple panel ones, which might result in
unpredictable behavior.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Tested-by: Nicolas Ferre <nicolas.ferre@atmel.com>
[treding@nvidia.com: reshuffle some code for consistency]
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodrm/panel: simple: Add timings for the Olimex LCD-OLinuXino-4.3TS
Maxime Ripard [Wed, 23 Mar 2016 16:38:34 +0000 (17:38 +0100)]
drm/panel: simple: Add timings for the Olimex LCD-OLinuXino-4.3TS

Add support for the Olimex LCD-OLinuXino-4.3TS panel to the DRM simple
panel driver.

It is a 480x272 panel connected through a 24-bits RGB interface.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agodrm/panel: simple: Add the 7" DPI panel from Adafruit
Eric Anholt [Fri, 25 Mar 2016 00:23:48 +0000 (17:23 -0700)]
drm/panel: simple: Add the 7" DPI panel from Adafruit

This is a basic TFT panel with a 40-pin FPC connector on it.  The
specification doesn't define timings, but the Adafruit instructions
were setting up 800x480 CVT.

v2: Add .bus_format and vsync/hsync flags.

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Rob Herring <robh@kernel.org>
[treding@nvidia.com: keep entries properly sorted]
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agoof: Add vendor prefix for On Tat Industrial Company.
Eric Anholt [Fri, 25 Mar 2016 00:23:47 +0000 (17:23 -0700)]
of: Add vendor prefix for On Tat Industrial Company.

This is the vendor for a 7" DPI panel sold by Adafruit which I'd like
to describe in DT.

Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
8 years agoMerge tag 'drm/tegra/for-4.7-rc1' of git://anongit.freedesktop.org/tegra/linux into...
Dave Airlie [Thu, 12 May 2016 01:15:18 +0000 (11:15 +1000)]
Merge tag 'drm/tegra/for-4.7-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

drm/tegra: Changes for v4.7-rc1

Two small changes, one getting rid of the bogus gamma table size and
another removing Terje from the MAINTAINERS file since he no longer does
any work on host1x or display.

* tag 'drm/tegra/for-4.7-rc1' of git://anongit.freedesktop.org/tegra/linux:
  MAINTAINERS: Remove Terje Bergström as Tegra DRM maintainer
  drm/tegra: Don't set a gamma table size

8 years agoMerge branch 'drm-hisilicon-next' of github.com:xin3liang/linux into drm-next
Dave Airlie [Thu, 12 May 2016 01:11:03 +0000 (11:11 +1000)]
Merge branch 'drm-hisilicon-next' of github.com:xin3liang/linux into drm-next

misc hisilicon cleanups.

* 'drm-hisilicon-next' of github.com:xin3liang/linux:
  drm/hisilicon: Fix DRM_INFO printed issue
  drm/hisilicon: Make kirin_drm_unbind sufficient
  drm/hisilicon: Use drm_connector_register_all

8 years agoMerge branch 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daein...
Dave Airlie [Thu, 12 May 2016 00:10:53 +0000 (10:10 +1000)]
Merge branch 'exynos-drm-next' of git://git./linux/kernel/git/daeinki/drm-exynos into drm-next

 Summary:
   - expose HDMI-PHY clock to other drivers.
     . this patch was included in below patch series but I missed.
             http://www.spinics.net/lists/dri-devel/msg103097.html
   - some fixups about DECON5433 driver
     . this patch corrects vblank handling and fixes up trigger
       configuration.
   - use generic functions - gem_prime_mmap and dma_buf_mmap.
   - use DMA-Mapping API instead of specific one.
   - some code cleanups and fixeups.

* 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm/exynos/decon5433: fix trigger configuration
  drm/exynos/dsi: use of_graph_get_endpoint_by_regs helper
  drm/exynos/dpi: use of_graph_get_endpoint_by_regs helper
  drm/exynos: Nuke dummy fb->dirty callback
  drm/exynos: use directly DMA mapping APIs on g2d
  drm/exynos/hdmi: Don't print error on deferral due to regulators
  drm/exynos: fix imported dma-buf to be mapped
  drm/exynos: support gem_prime_mmap
  drm/exynos: fimd: harden fimd_calc_clkdiv()
  drm/exynos: fix cancel page flip code
  drm/exynos/decon5433: do not use unnecessary software trigger
  drm/exynos/decon5433: handle vblank in vblank interrupt
  drm/exynos/hdmi: expose HDMI-PHY clock as pipeline clock

8 years agodrm/hisilicon: Fix DRM_INFO printed issue
Xinliang Liu [Mon, 9 May 2016 01:59:50 +0000 (09:59 +0800)]
drm/hisilicon: Fix DRM_INFO printed issue

This patch fixed the bellow no DRM_INFO is printed issue:

if (!delay_count)
DRM_INFO("phylock and phystopstateclklane is not ready.\n");

There will some printed issues with above info, under certain
circumstances:

If ((BIT(0) | BIT(2)) & val) is never true, break will not happen and
delay_count will be max u32 value (?), and no DRM_INFO is printed.

Also if ((BIT(0) | BIT(2)) & val) is true at the last possible
loop round, break happens, but now delay_count is already zero
( because of earlier delay_count-- ) and DRM_INFO is erroneously
printed.

Thanks to Juha Leppänen, he reports to me this issue.

Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Reported-by: Juha Leppänen <juha_efku@dnainternet.net>
8 years agodrm/hisilicon: Make kirin_drm_unbind sufficient
Xinliang Liu [Sun, 8 May 2016 09:48:55 +0000 (17:48 +0800)]
drm/hisilicon: Make kirin_drm_unbind sufficient

Remove deprecated drm_put_dev.
Clean up everything needed in unbind.
Thanks to Daniel Vetter, this issue is reported by him.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reported-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
8 years agodrm/hisilicon: Use drm_connector_register_all
Daniel Vetter [Fri, 6 May 2016 08:28:41 +0000 (10:28 +0200)]
drm/hisilicon: Use drm_connector_register_all

Use drm_connector_register_all helper to register connectors.

Cc: Xinliang Liu <xinliang.liu@linaro.org>
Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
8 years agodrm/exynos/decon5433: fix trigger configuration
Andrzej Hajda [Fri, 29 Apr 2016 13:42:49 +0000 (15:42 +0200)]
drm/exynos/decon5433: fix trigger configuration

It seems trigger cannot be configured too early, otherwise it does not work in
case of panel. The patch fixes also trigger flag logic, previously HW-TRIGGER
flag was cleared in case of panel - as a result panel used always software
trigger.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos/dsi: use of_graph_get_endpoint_by_regs helper
Philipp Zabel [Tue, 3 May 2016 13:47:25 +0000 (15:47 +0200)]
drm/exynos/dsi: use of_graph_get_endpoint_by_regs helper

This allows to remove the local of_graph_get_port_by_reg(),
of_graph_get_endpoint_by_reg(), and of_get_child_by_name_reg()
functions.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos/dpi: use of_graph_get_endpoint_by_regs helper
Philipp Zabel [Tue, 3 May 2016 13:47:24 +0000 (15:47 +0200)]
drm/exynos/dpi: use of_graph_get_endpoint_by_regs helper

This allows to remove the local of_graph_get_port_by_reg(),
of_graph_get_endpoint_by_reg(), of_get_child_by_name_reg(),
and of_graph_get_remote_port_parent() functions.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos: Nuke dummy fb->dirty callback
Daniel Vetter [Wed, 27 Apr 2016 11:38:41 +0000 (13:38 +0200)]
drm/exynos: Nuke dummy fb->dirty callback

It's an optional hook. Might be needed for frontbuffer rendering on
manual upload displays, but a simple TODO doesn't explain at all what
needs to be done or why.

Cc: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos: use directly DMA mapping APIs on g2d
Joonyoung Shim [Fri, 22 Apr 2016 07:34:07 +0000 (16:34 +0900)]
drm/exynos: use directly DMA mapping APIs on g2d

There is no reason to be wapper functions to use DMA mapping APIs. Use
directly DMA mapping APIs and remove the wapper functions.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos/hdmi: Don't print error on deferral due to regulators
Javier Martinez Canillas [Thu, 21 Apr 2016 18:51:38 +0000 (14:51 -0400)]
drm/exynos/hdmi: Don't print error on deferral due to regulators

The regulators may not be available just because their driver's probe
function was just not executed and so the regulators not registered.

So, in this case the Exynos HDMI driver should not print logs since
a -EPROBE_DEFER is not really an error and that will just pollute
the kernel log and confuse users.

This patch prevents the following misleading messages to be printed:

[    1.443638] [drm:hdmi_probe] *ERROR* failed to get regulators
[    1.449326] [drm:hdmi_probe] *ERROR* hdmi_resources_init failed

Reported-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos: fix imported dma-buf to be mapped
Joonyoung Shim [Fri, 22 Apr 2016 07:30:48 +0000 (16:30 +0900)]
drm/exynos: fix imported dma-buf to be mapped

The imported dma-buf should be mapped by sub-system exporting it.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos: support gem_prime_mmap
Joonyoung Shim [Fri, 22 Apr 2016 07:30:47 +0000 (16:30 +0900)]
drm/exynos: support gem_prime_mmap

This allows exported dma-bufs to be mapped using gem_prime_mmap.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos: fimd: harden fimd_calc_clkdiv()
Tobias Jakobi [Thu, 5 May 2016 16:23:38 +0000 (18:23 +0200)]
drm/exynos: fimd: harden fimd_calc_clkdiv()

Don't use the vrefresh field of the DRM mode since this
one is supposed to only be used for debug purpose.
Instead use the clock field which should also provide
much more precise information.

Also sanitize the case in which the clock value
should be zero. We then just default to the maximum
clock divisor.

Signed-off-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos: fix cancel page flip code
Andrzej Hajda [Wed, 4 May 2016 13:23:11 +0000 (15:23 +0200)]
drm/exynos: fix cancel page flip code

Driver code did not remove event from the list of pending events before destroy.
As a result drm core later tried to inspect invalid memory location.
The patch replaces removal code with call to core helper.

The bug was detected using KASAN:

[   10.107249] ==================================================================
[   10.107518] BUG: KASAN: use-after-free in drm_release+0xe9c/0x1000 at addr ffffffc089154a18
[   10.107784] Read of size 8 by task modetest/103
[   10.107931] =============================================================================
[   10.113191] BUG kmalloc-128 (Not tainted): kasan: bad access detected
[   10.119608] -----------------------------------------------------------------------------
[   10.119608]
[   10.129243] Disabling lock debugging due to kernel taint
[   10.134551] INFO: Allocated in drm_mode_page_flip_ioctl+0x500/0xa98 age=4 cpu=0 pid=103
[   10.142532]  alloc_debug_processing+0x18c/0x198
[   10.147043]  ___slab_alloc.constprop.28+0x360/0x380
[   10.151906]  __slab_alloc.isra.25.constprop.27+0x54/0xa0
[   10.157197]  kmem_cache_alloc_trace+0x370/0x3b0
[   10.161709]  drm_mode_page_flip_ioctl+0x500/0xa98
[   10.166400]  drm_ioctl+0x4c4/0xb68
[   10.169787]  do_vfs_ioctl+0x16c/0xeb8
[   10.173429]  SyS_ioctl+0x8c/0xa0
[   10.176642]  el0_svc_naked+0x24/0x28
[   10.180204] INFO: Freed in exynos_drm_crtc_cancel_page_flip+0xe0/0x160 age=0 cpu=0 pid=103
[   10.188447]  free_debug_processing+0x174/0x388
[   10.192871]  __slab_free+0x2e8/0x438
[   10.196431]  kfree+0x350/0x360
[   10.199469]  exynos_drm_crtc_cancel_page_flip+0xe0/0x160
[   10.204762]  exynos_drm_preclose+0x58/0xa0
[   10.208844]  drm_release+0x1f0/0x1000
[   10.212491]  __fput+0x1c4/0x5b8
[   10.215613]  ____fput+0xc/0x18
[   10.218654]  task_work_run+0x130/0x198
[   10.222385]  do_exit+0x700/0x2278
[   10.225681]  do_group_exit+0xe4/0x2c8
[   10.229327]  SyS_exit_group+0x1c/0x20
[   10.232973]  el0_svc_naked+0x24/0x28
[   10.236532] INFO: Slab 0xffffffbdc2a45500 objects=32 used=10 fp=0xffffffc089154a00 flags=0x4080
[   10.245210] INFO: Object 0xffffffc089154a00 @offset=2560 fp=0xffffffc089157600
[   10.245210]
...
[   10.384532] CPU: 0 PID: 103 Comm: modetest Tainted: G    B           4.5.0-rc3-00748-gd5e2881 #271
[   10.398325] Call trace:
[   10.400764] [<ffffffc000091428>] dump_backtrace+0x0/0x328
[   10.406141] [<ffffffc000091764>] show_stack+0x14/0x20
[   10.411176] [<ffffffc00089c550>] dump_stack+0xb0/0xe8
[   10.416210] [<ffffffc000395778>] print_trailer+0xf8/0x160
[   10.421592] [<ffffffc00039b5cc>] object_err+0x3c/0x50
[   10.426626] [<ffffffc00039d630>] kasan_report_error+0x248/0x550
[   10.432527] [<ffffffc00039da50>] __asan_report_load8_noabort+0x40/0x48
[   10.439039] [<ffffffc000b5b724>] drm_release+0xe9c/0x1000
[   10.444419] [<ffffffc0003d340c>] __fput+0x1c4/0x5b8
[   10.449280] [<ffffffc0003d3884>] ____fput+0xc/0x18
[   10.454055] [<ffffffc000101aa8>] task_work_run+0x130/0x198
[   10.459522] [<ffffffc0000bc058>] do_exit+0x700/0x2278
[   10.464557] [<ffffffc0000bdcfc>] do_group_exit+0xe4/0x2c8
[   10.469939] [<ffffffc0000bdefc>] SyS_exit_group+0x1c/0x20
[   10.475320] [<ffffffc000087530>] el0_svc_naked+0x24/0x28

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos/decon5433: do not use unnecessary software trigger
Andrzej Hajda [Fri, 29 Apr 2016 13:42:48 +0000 (15:42 +0200)]
drm/exynos/decon5433: do not use unnecessary software trigger

Software trigger should not be used if hardware trigger is configured.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos/decon5433: handle vblank in vblank interrupt
Andrzej Hajda [Fri, 29 Apr 2016 13:42:47 +0000 (15:42 +0200)]
drm/exynos/decon5433: handle vblank in vblank interrupt

vblank should be signaled to userspace after reading framebuffers not before,
signaling it in TE interrupt looks wrong. TE triggers reading framebuffers
so it is the worst moment. Tearing is not observable because hardware prevents
it, but there are frequently skipped vblank events.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agodrm/exynos/hdmi: expose HDMI-PHY clock as pipeline clock
Andrzej Hajda [Tue, 10 May 2016 04:56:32 +0000 (13:56 +0900)]
drm/exynos/hdmi: expose HDMI-PHY clock as pipeline clock

HDMI-PHY clock should be accessible from other components in the pipeline.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
8 years agoMerge branch 'drm-etnaviv-next' of git://git.pengutronix.de:/git/lst/linux into drm...
Dave Airlie [Tue, 10 May 2016 05:07:50 +0000 (15:07 +1000)]
Merge branch 'drm-etnaviv-next' of git://git.pengutronix.de:/git/lst/linux into drm-next

not much new stuff this time. A (micro-)optimization to allow the
hangcheck timer to be coalesced with other wakeups in the system and a
fix to handle mmaping of prime imported and userptr buffers correctly. I
don't think we have seen any actual issues going back to this yet, so I
figured it's safer to get this in via drm-next rather than smashing it
into fixes.

* 'drm-etnaviv-next' of git://git.pengutronix.de:/git/lst/linux:
  drm/etnaviv: fix mmap operations for userptr and dma-buf objects
  drm/etnaviv: take etnaviv_gem_obj in etnaviv_gem_mmap_obj
  drm/etnaviv: use deferrable timer for hangcheck handler
  timer: add setup_deferrable_timer macro

8 years agoMerge tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux into...
Dave Airlie [Tue, 10 May 2016 05:01:47 +0000 (15:01 +1000)]
Merge tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux into drm-next

MT8173 DRM support

- device tree binding documentation for all MT8173 display
  subsystem components
- basic mediatek-drm driver for MT8173 with two optional,
  currently fixed output paths:
- DSI encoder support for DSI and (via bridge) eDP panels
- DPI encoder support for output to HDMI bridge
- necessary clock tree changes for the DPI->HDMI path
- export mtk-smi functions used by mediatek-drm

* tag 'mediatek-drm-2016-05-09' of git://git.pengutronix.de/git/pza/linux:
  clk: mediatek: remove hdmitx_dig_cts from TOP clocks
  clk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output
  clk: mediatek: make dpi0_sel propagate rate changes
  drm/mediatek: Add DPI sub driver
  drm/mediatek: Add DSI sub driver
  drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.
  dt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding
  memory: mtk-smi: export mtk_smi_larb_get/put

8 years agoMerge tag 'v4.6-rc7' into drm-next
Dave Airlie [Mon, 9 May 2016 03:49:56 +0000 (13:49 +1000)]
Merge tag 'v4.6-rc7' into drm-next

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

8 years agodrm/amdgpu: fix build on aarch64.
Dave Airlie [Mon, 9 May 2016 00:30:42 +0000 (10:30 +1000)]
drm/amdgpu: fix build on aarch64.

Same fix went in previously for some other files.

Signed-off-by: Dave Airlie <airlied@redhat.com>
8 years agoMerge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm...
Dave Airlie [Mon, 9 May 2016 00:19:38 +0000 (10:19 +1000)]
Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next

Mostly cleanups, fixes, and 'struct fence' conversion this time
around, with one reservation patch which is a-b Sumit (which the fence
conversion patches depend on).

* 'msm-next' of git://people.freedesktop.org/~robclark/linux: (25 commits)
  drm/msm: Drop load/unload drm_driver ops
  drm/msm: Centralize connector registration/unregistration
  drm/msm/hdmi: Prevent gpio_free related kernel warnings
  drm/msm: print offender task name on hangcheck recovery
  drm/msm: fix leak in failed submit path
  drm/msm: de-indent submit_create()
  drm/msm: drop return from gpu->submit()
  drm/msm/mdp4: Don't manage DSI PLL regulators in MDP driver
  drm/msm/edp: Drop regulator_set_voltage call
  drm/msm/dsi: Fix regulator API abuse
  drm/msm: Move call to PTR_ERR_OR_ZERO after reassignment
  drm/msm/mdp: Add support for more RGBX formats
  drm: msm: remove unused variable
  drm/msm: fix ->last_fence() after recover
  drm/msm: 'struct fence' conversion
  drm/msm: remove fence_cbs
  drm/msm: introduce msm_fence_context
  drm/msm: split locking and pinning BO's
  drm/msm/gpu: simplify tracking in-flight bo's
  drm/msm: split out timeout_to_jiffies helper
  ...

8 years agoMerge tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Mon, 9 May 2016 00:16:50 +0000 (10:16 +1000)]
Merge tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel into drm-next

Refcounting is hard, so here's a quick pull request with the one-liner to
fix up i915. Otherwise just a few other small things I picked up. Plus the
regression fix from Marten for rmfb behaviour that lingered around forever
since no testers. Feel free to cherry-pick that over to drm-fixes, but
given that there's not many who seemed to have cared, meh.

* tag 'topic/drm-misc-2016-05-08' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: Correctly refcount connectors in hw state readou
  drm/panel: Flesh out kerneldoc
  drm: Add gpu.tmpl docbook to MAINTAINERS entry
  drm/core: Do not preserve framebuffer on rmfb, v4.
  drm: Fix up markup fumble
  drm/fb_helper: Fix a few typos

8 years agoLinux 4.6-rc7
Linus Torvalds [Sun, 8 May 2016 21:38:32 +0000 (14:38 -0700)]
Linux 4.6-rc7

8 years agodrm/msm: Drop load/unload drm_driver ops
Archit Taneja [Mon, 2 May 2016 05:35:54 +0000 (11:05 +0530)]
drm/msm: Drop load/unload drm_driver ops

The load/unload drm_driver ops are deprecated. They should be removed as
they result in creation of devices visible to userspace even before
the drm_device is registered.

Drop these ops and use drm_dev_alloc/register and drm_dev_unregister/unref
to explicitly create and destroy the drm device in the msm platform
driver's bind and unbind ops. With this in use, the drm connectors are
only registered once the drm_device is registered.

It also fixes the issue of stray debugfs files after the msm module is
removed. With this, all the debugfs files are removed, and allows
successive module insertions/removals.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
8 years agodrm/msm: Centralize connector registration/unregistration
Archit Taneja [Mon, 2 May 2016 05:35:53 +0000 (11:05 +0530)]
drm/msm: Centralize connector registration/unregistration

Move the drm_connector registration from the encoder(HDMI/DSI etc) drivers
to the msm platform driver. This will simplify the task of ensuring that
the connectors are registered only after the drm_device itself is
registered.

The connectors' destroy ops are made to use kzalloc instead of
devm_kzalloc to ensure that that the connectors can be successfully
unregistered when the msm driver module is removed. The memory for the
connectors is unallocated when drm_mode_config_cleanup() is called
during either during an error or during driver remove.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/hdmi: Prevent gpio_free related kernel warnings
Archit Taneja [Mon, 2 May 2016 05:35:52 +0000 (11:05 +0530)]
drm/msm/hdmi: Prevent gpio_free related kernel warnings

Calling the legacy gpio_free on an invalid GPIO (a GPIO numbered -1)
results in kernel warnings. This causes a lot of backtraces when
we try to unload the drm/msm module.

Call gpio_free only on valid GPIOs.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: print offender task name on hangcheck recovery
Rob Clark [Tue, 3 May 2016 14:10:15 +0000 (10:10 -0400)]
drm/msm: print offender task name on hangcheck recovery

Track the pid per submit, so we can print the name of the task which
submitted the batch that caused the gpu to hang.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: fix leak in failed submit path
Rob Clark [Tue, 3 May 2016 13:50:26 +0000 (09:50 -0400)]
drm/msm: fix leak in failed submit path

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: de-indent submit_create()
Rob Clark [Tue, 3 May 2016 13:49:40 +0000 (09:49 -0400)]
drm/msm: de-indent submit_create()

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: drop return from gpu->submit()
Rob Clark [Tue, 3 May 2016 13:46:49 +0000 (09:46 -0400)]
drm/msm: drop return from gpu->submit()

At this point, there is nothing left to fail.  And submit already has a
fence assigned and is added to the submit_list.  Any problems from here
on out are asynchronous (ie. hangcheck/recovery).

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp4: Don't manage DSI PLL regulators in MDP driver
Archit Taneja [Fri, 29 Apr 2016 09:49:37 +0000 (15:19 +0530)]
drm/msm/mdp4: Don't manage DSI PLL regulators in MDP driver

The MDP4 driver tries to request and set voltages for regulators required
by the DSI PLLs.

Firstly, the MDP4 driver shouldn't manage the DSI regulators, this should
be handled in the DSI driver. Secondly, it shouldn't try to set a fixed
voltage for regulators. Voltage constraints should be specified on the
regulator via DT and managed by the regulator core.

Remove all the DSI PLL regulator related code from the MDP4 driver. It's
managed in the DSI driver for MSM8960/APQ8064 already.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/edp: Drop regulator_set_voltage call
Archit Taneja [Fri, 29 Apr 2016 09:49:36 +0000 (15:19 +0530)]
drm/msm/edp: Drop regulator_set_voltage call

The eDP driver tries to set a fixed voltage for one of its regulators(vdda)
before enabling it. This shouldn't be done by the driver, the voltage
constraints should be specified on the regulator via DT and managed by
the regulator core. A driver should call regulator_set_voltage only if
it needs to change the voltage during runtime. Drop the
regulator_set_voltage call. Mention in a comment the voltage that the
regulator expects.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/dsi: Fix regulator API abuse
Archit Taneja [Fri, 29 Apr 2016 09:49:35 +0000 (15:19 +0530)]
drm/msm/dsi: Fix regulator API abuse

The voltage changing code in this driver is broken and should be
removed.  The driver sets a single, exact voltage on probe.  Unless
there is a very good reason for this (which should be documented in
comments) constraints like this need to be set via the machine
constraints, voltage setting in a driver is expected to be used in cases
where the voltage varies at runtime.

In addition client drivers should almost never be calling
regulator_can_set_voltage(), if the device needs to set a voltage it
needs to set the voltage and the regulator core will handle the case
where the regulator is fixed voltage.  If the driver simply skips
setting the voltage if it doesn't have permission then it should just
not bother in the first place.

Originally authored by Mark Brown <broonie@kernel.org>

Remove the min/max voltage data entries per SoC managed by the driver.
These aren't needed as we don't try to set voltages any more. Mention in
comments the voltages that each regulator expects.

Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: Move call to PTR_ERR_OR_ZERO after reassignment
Vaishali Thakkar [Thu, 28 Apr 2016 13:22:49 +0000 (18:52 +0530)]
drm/msm: Move call to PTR_ERR_OR_ZERO after reassignment

Here, a location is reset to NULL before being passed to PTR_ERR.
So, PTR_ERR should be called before its argument is reassigned
to NULL. Further to simplify things use PTR_ERR_OR_ZERO instead
of PTR_ERR and IS_ERR.

Problem found using Coccinelle.

Signed-off-by: Vaishali Thakkar <vaishali.thakkar@oracle.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
[fixed fmt string warning (s/%ld/%d/)]
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/mdp: Add support for more RGBX formats
Rob Herring [Mon, 11 Apr 2016 23:23:51 +0000 (18:23 -0500)]
drm/msm/mdp: Add support for more RGBX formats

Android needs XBGR8888 format. Add all the missing 32-bpp formats
without alpha for completeness.

Cc: Archit Taneja <architt@codeaurora.org>
Cc: Rob Clark <robdclark@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm: msm: remove unused variable
Arnd Bergmann [Sat, 16 Apr 2016 20:41:46 +0000 (22:41 +0200)]
drm: msm: remove unused variable

A recent cleanup removed the only user of the 'kms' variable in
msm_preclose(), causing a harmless compiler warning:

drivers/gpu/drm/msm/msm_drv.c: In function 'msm_preclose':
drivers/gpu/drm/msm/msm_drv.c:468:18: error: unused variable 'kms' [-Werror=unused-variable]

This removes the variable as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 4016260ba47a ("drm/msm: fix bug after preclose removal")
Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: fix ->last_fence() after recover
Rob Clark [Thu, 17 Mar 2016 14:18:38 +0000 (10:18 -0400)]
drm/msm: fix ->last_fence() after recover

It is no longer true that we discard all in-flight submits on recover
(these days we only discard the first one that hung).  After the first
re-submitted batch completes it would overwrite the fence with a correct
value, but there would be a window of time which showed all re-submitted
batches as already complete.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: 'struct fence' conversion
Rob Clark [Tue, 15 Mar 2016 22:26:28 +0000 (18:26 -0400)]
drm/msm: 'struct fence' conversion

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: remove fence_cbs
Rob Clark [Wed, 16 Mar 2016 22:18:17 +0000 (18:18 -0400)]
drm/msm: remove fence_cbs

This was only used for atomic commit these days.  So instead just give
atomic it's own work-queue where we can do a block on each bo in turn.
Simplifies things a whole bunch and makes the 'struct fence' conversion
easier.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: introduce msm_fence_context
Rob Clark [Tue, 15 Mar 2016 21:22:13 +0000 (17:22 -0400)]
drm/msm: introduce msm_fence_context

Better encapsulate the per-timeline stuff into fence-context.  For now
there is just a single fence-context, but eventually we'll also have one
per-CRTC to enable fully explicit fencing.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: split locking and pinning BO's
Rob Clark [Mon, 14 Mar 2016 17:56:37 +0000 (13:56 -0400)]
drm/msm: split locking and pinning BO's

Split up locking and pinning buffers in the submit path.  This is needed
because we'll want to insert fencing in between the two steps.

This makes things end up looking more similar to etnaviv submit code
(which was originally modelled on the msm code but has already added
'struct fence' support).

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm/gpu: simplify tracking in-flight bo's
Rob Clark [Wed, 16 Mar 2016 20:07:38 +0000 (16:07 -0400)]
drm/msm/gpu: simplify tracking in-flight bo's

Since we already track the array of bo's in the submit object, just
unconditionally take and drop ref's per submit (rather than only taking
ref's if bo is not already active).  This simplifies later patches.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: split out timeout_to_jiffies helper
Rob Clark [Wed, 16 Mar 2016 18:57:22 +0000 (14:57 -0400)]
drm/msm: split out timeout_to_jiffies helper

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: use imported dmabuf's reservation object
Rob Clark [Wed, 16 Mar 2016 16:40:35 +0000 (12:40 -0400)]
drm/msm: use imported dmabuf's reservation object

This was always the intention, but somehow it was never wired up
properly.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: move fence code to it's own file
Rob Clark [Tue, 15 Mar 2016 19:35:08 +0000 (15:35 -0400)]
drm/msm: move fence code to it's own file

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agodrm/msm: move debugfs code to it's own file
Rob Clark [Wed, 16 Mar 2016 16:56:12 +0000 (12:56 -0400)]
drm/msm: move debugfs code to it's own file

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agoreservation: add reservation_object_get_excl_rcu()
Rob Clark [Thu, 31 Mar 2016 20:23:51 +0000 (16:23 -0400)]
reservation: add reservation_object_get_excl_rcu()

In the atomic modesetting path, each driver simply wants to grab a ref
to the exclusive fence from a reservation object to store in the incoming
drm_plane_state, without doing the whole RCU dance.  Since each driver
will need to do this, lets make a helper.

v2: rename to _rcu instead of _unlocked to be more consistent

Signed-off-by: Rob Clark <robdclark@gmail.com>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
8 years agodrm/msm: make HDCP support optional
Rob Clark [Sun, 20 Mar 2016 14:16:29 +0000 (10:16 -0400)]
drm/msm: make HDCP support optional

It is already optional at runtime.  But this at least simplifies
backports to kernels without QCOM_SCM.

Signed-off-by: Rob Clark <robdclark@gmail.com>
8 years agoMerge tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 7 May 2016 17:53:32 +0000 (10:53 -0700)]
Merge tag 'char-misc-4.6-rc7' of git://git./linux/kernel/git/gregkh/char-misc

Pull misc driver fixes from Gfreg KH:
 "Here are three small fixes for some driver problems that were
  reported.  Full details in the shortlog below.

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  nvmem: mxs-ocotp: fix buffer overflow in read
  Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()
  misc: mic: Fix for double fetch security bug in VOP driver

8 years agoMerge tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 7 May 2016 17:50:48 +0000 (10:50 -0700)]
Merge tag 'staging-4.6-rc7' of git://git./linux/kernel/git/gregkh/staging

Pull IIO driver fixes from Grek KH:
 "It's really just IIO drivers here, some small fixes that resolve some
  'crash on boot' errors that have shown up in the -rc series, and other
  bugfixes that are required.

  All have been in linux-next with no reported problems"

* tag 'staging-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio: imu: mpu6050: Fix name/chip_id when using ACPI
  iio: imu: mpu6050: fix possible NULL dereferences
  iio:adc:at91-sama5d2: Repair crash on module removal
  iio: ak8975: fix maybe-uninitialized warning
  iio: ak8975: Fix NULL pointer exception on early interrupt

8 years agoMerge tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sat, 7 May 2016 17:47:03 +0000 (10:47 -0700)]
Merge tag 'usb-4.6-rc7' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some last-remaining fixes for USB drivers to resolve issues
  that have shown up in testing.  And two new device ids as well.

  All of these have been in linux-next with no reported issues"

* tag 'usb-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  Revert "USB / PM: Allow USB devices to remain runtime-suspended when sleeping"
  usb: musb: jz4740: fix error check of usb_get_phy()
  Revert "usb: musb: musb_host: Enable HCD_BH flag to handle urb return in bottom half"
  usb: musb: gadget: nuke endpoint before setting its descriptor to NULL
  USB: serial: cp210x: add Straizona Focusers device ids
  USB: serial: cp210x: add ID for Link ECU

8 years agoMerge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sat, 7 May 2016 15:27:35 +0000 (08:27 -0700)]
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "These are a number of updates to fix a few problems found in the ARM
  nommu code over the last couple of years, caused mostly by changes on
  the mmu side"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8573/1: domain: move {set,get}_domain under config guard
  ARM: 8572/1: nommu: change memory reserve for the vectors
  ARM: 8571/1: nommu: fix PMSAv7 setup

8 years agoMerge tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
Linus Torvalds [Sat, 7 May 2016 15:17:45 +0000 (08:17 -0700)]
Merge tag 'media/v4.6-5' of git://git./linux/kernel/git/mchehab/linux-media

Pull media fixes from Mauro Carvalho Chehab:

  - deadlock fixes on driver probe at exynos4-is and s43-camif drivers

  - a build breakage if media controller is enabled and USB or PCI is
   built as module.

* tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] media-device: fix builds when USB or PCI is compiled as module
  [media] media: s3c-camif: fix deadlock on driver probe()
  [media] media: exynos4-is: fix deadlock on driver probe

8 years agoMerge branch 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
Linus Torvalds [Sat, 7 May 2016 15:13:42 +0000 (08:13 -0700)]
Merge branch 'for-4.6-fixes' of git://git./linux/kernel/git/tj/libata

Pull libata fixes from Tejun Heo:
 "An ahci driver addition and updates to ahci port enable handling for
  some platform devices"

* 'for-4.6-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
  ata: add AMD Seattle platform driver
  ARM: dts: apq8064: add ahci ports-implemented mask
  ata: ahci-platform: Add ports-implemented DT bindings.
  libahci: save port map for forced port map

8 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Linus Torvalds [Sat, 7 May 2016 15:10:08 +0000 (08:10 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/dledford/rdma

Pull rdma fix from Doug Ledford:
 "Fix for max sector calculation in iSER"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
  IB/iser: Fix max_sectors calculation

8 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 6 May 2016 20:08:35 +0000 (13:08 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull writeback fix from Jens Axboe:
 "Just a single fix for domain aware writeback, fixing a regression that
  can cause balance_dirty_pages() to keep looping while not getting any
  work done"

* 'for-linus' of git://git.kernel.dk/linux-block:
  writeback: Fix performance regression in wb_over_bg_thresh()

8 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 19:59:27 +0000 (12:59 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Ingo Molnar:
 "This contains two fixes: a boot fix for older SGI/UV systems, and an
  APIC calibration fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
  x86/platform/UV: Bring back the call to map_low_mmrs in uv_system_init

8 years agoMerge tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
Linus Torvalds [Fri, 6 May 2016 18:58:45 +0000 (11:58 -0700)]
Merge tag 'pm+acpi-4.6-rc7' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management and ACPI fixes from Rafael Wysocki:
 "Fixes for problems introduced or discovered recently (intel_pstate,
  sti-cpufreq, ARM64 cpuidle, Operating Performance Points framework,
  generic device properties framework) and one fix for a hotplug-related
  deadlock in ACPICA that's been there forever, but is nasty enough.

  Specifics:

   - Fix for a recent regression in the intel_pstate driver causing it
     to fail to restore the HWP (HW-managed P-states) configuration of
     the boot CPU after suspend-to-RAM (Rafael Wysocki).

   - Fix for two recent regressions in the intel_pstate driver, one that
     can trigger a divide by zero if the driver is accessed via sysfs
     before it manages to take the first sample and one causing it to
     fail to update a structure field used in a trace point, so the
     information coming from it is less useful (Rafael Wysocki).

   - Fix for a problem in the sti-cpufreq driver introduced during the
     4.5 cycle that causes it to break CPU PM in multi-platform kernels
     by registering cpufreq-dt (which subsequently doesn't work)
     unconditionally and preventing the driver that would actually work
     from registering (Sudeep Holla).

   - Stable-candidate fix for an ARM64 cpuidle issue causing idle state
     usage counters to be incorrectly updated for idle states that were
     not entered due to errors (James Morse).

   - Fix for a recently introduced issue in the OPP (Operating
     Performance Points) framework causing it to print bogus error
     messages for missing optional regulators (Viresh Kumar).

   - Fix for a recently introduced issue in the generic device
     properties framework that may cause it to attempt to dereferece and
     invalid pointer in some cases (Heikki Krogerus).

   - Fix for a deadlock in the ACPICA core that may be triggered by
     device (eg Thunderbolt) hotplug (Prarit Bhargava)"

* tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  PM / OPP: Remove useless check
  ACPICA: Dispatcher: Update thread ID for recursive method calls
  intel_pstate: Fix intel_pstate_get()
  cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
  cpufreq: st: enable selective initialization based on the platform
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value
  device property: Avoid potential dereferences of invalid pointers

8 years agoMerge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:53:27 +0000 (11:53 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler fix from Ingo Molnar:
 "This contains a single fix that fixes a nohz tick stopping bug when
  mixed-poliocy SCHED_FIFO and SCHED_RR tasks are present on a runqueue"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  nohz/full, sched/rt: Fix missed tick-reenabling bug in sched_can_stop_tick()

8 years agoMerge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:40:24 +0000 (11:40 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Ingo Molnar:
 "This tree contains two fixes: new Intel CPU model numbers and an
  AMD/iommu uncore PMU driver fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs
  perf/x86: Add model numbers for Kabylake CPUs

8 years agoMerge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 6 May 2016 18:33:02 +0000 (11:33 -0700)]
Merge branch 'efi-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull EFI fixes from Ingo Molnar:
 "This tree contains three fixes: a console spam fix, a file pattern fix
  and a sysfb_efi fix for a bug that triggered on older ThinkPads"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sysfb_efi: Fix valid BAR address range check
  x86/efi-bgrt: Switch all pr_err() to pr_notice() for invalid BGRT
  MAINTAINERS: Remove asterisk from EFI directory names

8 years agoMerge branch 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Fri, 6 May 2016 18:27:05 +0000 (11:27 -0700)]
Merge branch 'parisc-4.6-5' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc fix from Helge Deller:
 "Patch from Dmitry V Levin to fix a kernel crash when a straced process
  calls the (invalid) syscall which is equal to value of __NR_Linux_syscalls"

* 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls

8 years agoMerge tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Linus Torvalds [Fri, 6 May 2016 18:14:38 +0000 (11:14 -0700)]
Merge tag 'arc-4.6-rc7-fixes' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:
 "Late in the cycle, but this has fixes for couple of issues: a PAE40
  boot crash and Arnd spotting lack of barriers in BE io-accessors.

  The 3rd patch for enabling highmem in low physical mem ;-) honestly is
  more than a "fix" but its been in works for some time, seems to be
  stable in testing and enables 2 of our customers to go forward with
  4.6 kernel.

   - Fix for PTE truncation in PAE40 builds
   - Fix for big endian IO accessors lacking IO barrier
   - Allow HIGHMEM to work with low physical addresses"

* tag 'arc-4.6-rc7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: support HIGHMEM even without PAE40
  ARC: Fix PAE40 boot failures due to PTE truncation
  ARC: Add missing io barriers to io{read,write}{16,32}be()

8 years agoMerge tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 6 May 2016 18:05:07 +0000 (11:05 -0700)]
Merge tag 'powerpc-4.6-5' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "Fix bad inline asm constraint in create_zero_mask() from Anton
  Blanchard"

* tag 'powerpc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Fix bad inline asm constraint in create_zero_mask()

8 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Fri, 6 May 2016 17:59:53 +0000 (10:59 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Fixes for i915, amdgpu/radeon and imx.

  The IMX fix is for an autoloading regression found in Fedora.  The
  radeon fixes, are the same fix to amdgpu/radeon to avoid a hardware
  lockup in some circumstances with a bad mode, and a double free bug I
  took a few hours chasing down the other morning.

  The i915 fixes are across the board, all stable material, and fixing
  some hangs and suspend/resume issues, along with a live status
  regressions"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading
  drm/amdgpu: make sure vertical front porch is at least 1
  drm/radeon: make sure vertical front porch is at least 1
  drm/amdgpu: set metadata pointer to NULL after freeing.
  drm/i915: Make RPS EI/thresholds multiple of 25 on SNB-BDW
  drm/i915: Fake HDMI live status
  drm/i915: Fix eDP low vswing for Broadwell
  drm/i915/ddi: Fix eDP VDD handling during booting and suspend/resume
  drm/i915: Fix system resume if PCI device remained enabled
  drm/i915: Avoid stalling on pending flips for legacy cursor updates

8 years agoclk: mediatek: remove hdmitx_dig_cts from TOP clocks
Philipp Zabel [Mon, 4 Jan 2016 17:36:45 +0000 (18:36 +0100)]
clk: mediatek: remove hdmitx_dig_cts from TOP clocks

The hdmitx_dig_cts clock signal is not a child of tvdpll_445p5m,
but is routed out of the HDMI PHY module.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
8 years agoclk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output
Philipp Zabel [Mon, 30 Nov 2015 21:07:53 +0000 (22:07 +0100)]
clk: mediatek: Add hdmi_ref HDMI PHY PLL reference clock output

The configurable hdmi_ref output of the PLL block is derived from
the tvdpll_594m clock signal via a configurable PLL post-divider.
It is used as the PLL reference input to the HDMI PHY module.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
8 years agoclk: mediatek: make dpi0_sel propagate rate changes
Philipp Zabel [Mon, 4 Jan 2016 17:36:42 +0000 (18:36 +0100)]
clk: mediatek: make dpi0_sel propagate rate changes

This mux is supposed to select a fitting divider after the PLL
is already set to the correct rate.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
8 years agodrm/mediatek: Add DPI sub driver
Jie Qiu [Mon, 4 Jan 2016 17:36:36 +0000 (18:36 +0100)]
drm/mediatek: Add DPI sub driver

Add DPI connector/encoder to support HDMI output via the
attached HDMI bridge.

Signed-off-by: Jie Qiu <jie.qiu@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agodrm/mediatek: Add DSI sub driver
CK Hu [Mon, 4 Jan 2016 17:36:35 +0000 (18:36 +0100)]
drm/mediatek: Add DSI sub driver

This patch add a drm encoder/connector driver for the MIPI DSI function
block of the Mediatek display subsystem and a phy driver for the MIPI TX
D-PHY control module.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agodrm/mediatek: Add DRM Driver for Mediatek SoC MT8173.
CK Hu [Mon, 4 Jan 2016 17:36:34 +0000 (18:36 +0100)]
drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.

This patch adds an initial DRM driver for the Mediatek MT8173 DISP
subsystem. It currently supports two fixed output streams from the
OVL0/OVL1 sources to the DSI0/DPI0 sinks, respectively.

Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: YT Shen <yt.shen@mediatek.com>
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Signed-off-by: Mao Huang <littlecvr@chromium.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agodrm/i915: Correctly refcount connectors in hw state readou
Daniel Vetter [Fri, 6 May 2016 13:39:03 +0000 (15:39 +0200)]
drm/i915: Correctly refcount connectors in hw state readou

This was forgotten when adding the the refcounting to
drm_connector_state.

v2: Don't forget to unreference existing connectors. This isn't
relevant on driver load, but this code also runs on resume, and there
we already have an atomic state. Spotted by Chris Wilson.

Cc: Gabriel Feceoru <gabriel.feceoru@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Marius Vlad <marius.c.vlad@intel.com>
Cc: Dave Airlie <airlied@redhat.com>
Fixes: d2307dea14a4 ("drm/atomic: use connector references (v3)")
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462541943-19620-1-git-send-email-daniel.vetter@ffwll.ch
8 years agodrm/panel: Flesh out kerneldoc
Thierry Reding [Fri, 6 May 2016 14:01:37 +0000 (16:01 +0200)]
drm/panel: Flesh out kerneldoc

Write more complete kerneldoc comments for the DRM panel API and
integrate the helpers in the DRM DocBook reference.

Signed-off-by: Thierry Reding <treding@nvidia.com>drm/panel: Add helper for simple panel connector
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20160506140137.GA4641@ulmo.ba.sec
8 years agoparisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls
Dmitry V. Levin [Wed, 27 Apr 2016 01:56:11 +0000 (04:56 +0300)]
parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls

Do not load one entry beyond the end of the syscall table when the
syscall number of a traced process equals to __NR_Linux_syscalls.
Similar bug with regular processes was fixed by commit 3bb457af4fa8
("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls").

This bug was found by strace test suite.

Cc: stable@vger.kernel.org
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Acked-by: Helge Deller <deller@gmx.de>
Signed-off-by: Helge Deller <deller@gmx.de>
8 years agodt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding
CK Hu [Mon, 4 Jan 2016 17:36:33 +0000 (18:36 +0100)]
dt-bindings: drm/mediatek: Add Mediatek display subsystem dts binding

Add device tree binding documentation for the display subsystem in
Mediatek MT8173 SoCs.

Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Rob Herring <robh@kernel.org>
8 years agomemory: mtk-smi: export mtk_smi_larb_get/put
Philipp Zabel [Wed, 27 Apr 2016 08:48:00 +0000 (10:48 +0200)]
memory: mtk-smi: export mtk_smi_larb_get/put

To allow building mediatek-drm.ko as a module, the
mtk_smi_larb_get and mtk_smi_larb_put symbols have
to be exported.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
8 years agoMerge branches 'pm-opp-fixes', 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes'
Rafael J. Wysocki [Fri, 6 May 2016 11:16:22 +0000 (13:16 +0200)]
Merge branches 'pm-opp-fixes', 'pm-cpufreq-fixes' and 'pm-cpuidle-fixes'

* pm-opp-fixes:
  PM / OPP: Remove useless check

* pm-cpufreq-fixes:
  intel_pstate: Fix intel_pstate_get()
  cpufreq: intel_pstate: Fix HWP on boot CPU after system resume
  cpufreq: st: enable selective initialization based on the platform

* pm-cpuidle-fixes:
  ARM: cpuidle: Pass on arm_cpuidle_suspend()'s return value

8 years agoMerge branches 'acpica-fixes' and 'device-properties-fixes'
Rafael J. Wysocki [Fri, 6 May 2016 11:15:52 +0000 (13:15 +0200)]
Merge branches 'acpica-fixes' and 'device-properties-fixes'

* acpica-fixes:
  ACPICA: Dispatcher: Update thread ID for recursive method calls

* device-properties-fixes:
  device property: Avoid potential dereferences of invalid pointers

8 years agox86/tsc: Read all ratio bits from MSR_PLATFORM_INFO
Chen Yu [Fri, 6 May 2016 03:33:39 +0000 (11:33 +0800)]
x86/tsc: Read all ratio bits from MSR_PLATFORM_INFO

Currently we read the tsc radio: ratio = (MSR_PLATFORM_INFO >> 8) & 0x1f;

Thus we get bit 8-12 of MSR_PLATFORM_INFO, however according to the SDM
(35.5), the ratio bits are bit 8-15.

Ignoring the upper bits can result in an incorrect tsc ratio, which causes the
TSC calibration and the Local APIC timer frequency to be incorrect.

Fix this problem by masking 0xff instead.

[ tglx: Massaged changelog ]

Fixes: 7da7c1561366 "x86, tsc: Add static (MSR) TSC calibration on Intel Atom SoCs"
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: stable@vger.kernel.org
Cc: Bin Gao <bin.gao@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: http://lkml.kernel.org/r/1462505619-5516-1-git-send-email-yu.c.chen@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
8 years agodrm/etnaviv: fix mmap operations for userptr and dma-buf objects
Lucas Stach [Wed, 27 Apr 2016 10:27:02 +0000 (12:27 +0200)]
drm/etnaviv: fix mmap operations for userptr and dma-buf objects

Add an indirect object operations call to allow distinct implementations
of the mmap operation based on the type of the object.

This ensures that the exporter is called to set up the mmap for imported
dma-bufs and disallows mapping of userptr objects through the DRM file,
as this might lead to serious corruption of kernel internal state.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
8 years agodrm/etnaviv: take etnaviv_gem_obj in etnaviv_gem_mmap_obj
Lucas Stach [Wed, 27 Apr 2016 10:12:00 +0000 (12:12 +0200)]
drm/etnaviv: take etnaviv_gem_obj in etnaviv_gem_mmap_obj

This function will be changed to be called indirectly and this
prototype change brings it in line with all the other indirect
object calls.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
8 years agodrm/etnaviv: use deferrable timer for hangcheck handler
Lucas Stach [Wed, 23 Mar 2016 17:24:45 +0000 (18:24 +0100)]
drm/etnaviv: use deferrable timer for hangcheck handler

The hangcheck handler is already running with very coarse timeouts,
so it doesn't hurt to combine this timer with other wakeups in the
system.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
8 years agotimer: add setup_deferrable_timer macro
Lucas Stach [Tue, 12 Jan 2016 17:17:19 +0000 (18:17 +0100)]
timer: add setup_deferrable_timer macro

Add the trivial missing macro to setup a deferrable timer.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
8 years agoMerge branch 'for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu into drm-next
Dave Airlie [Fri, 6 May 2016 04:17:43 +0000 (14:17 +1000)]
Merge branch 'for-next' of git.agner.ch/git/linux-drm-fsl-dcu into drm-next

fsl-dcu pixel clock polarity support
* 'for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu:
  drm/fsl-dcu: use bus_flags for pixel clock polarity
  drm: introduce bus_flags in drm_display_info

8 years agoMerge branch 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux into drm...
Dave Airlie [Fri, 6 May 2016 04:17:22 +0000 (14:17 +1000)]
Merge branch 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux into drm-next

This is the first big radeon/amdgpu pull request for 4.7.  Highlights:
    - Polaris support in amdgpu
      Current display stack on par with other asics, for advanced features DAL is required
      Power management support
      Support for GFX, Compute, SDMA, UVD, VCE
    - VCE and UVD init/fini cleanup in radeon
    - GPUVM improvements
    - Scheduler improvements
    - Clockgating improvements
    - Powerplay improvements
    - TTM changes to support driver specific LRU update mechanism
    - Radeon support for new Mesa features
    - ASYNC pageflip support for radeon
    - Lots of bug fixes and code cleanups

* 'drm-next-4.7' of git://people.freedesktop.org/~agd5f/linux: (180 commits)
  drm/amdgpu: Replace rcu_assign_pointer() with RCU_INIT_POINTER()
  drm/amdgpu: use drm_mode_vrefresh() rather than mode->vrefresh
  drm/amdgpu/uvd6: add bypass support for fiji (v3)
  drm/amdgpu/fiji: set UVD CG state when enabling UVD DPM (v2)
  drm/powerplay: add missing clockgating callback for tonga
  drm/amdgpu: Constify some tables
  drm/amd/powerplay: Delete dead struct declaration
  drm/amd/powerplay/hwmgr: don't add invalid voltage
  drm/amd/powerplay/hwmgr: prevent VDDC from exceeding 2V
  MAINTAINERS: Remove unneded wildcard for the Radeon/AMDGPU drivers
  drm/radeon: add cayman VM support for append packet.
  drm/amd/amdgpu: Add debugfs entries for smc/didt/pcie
  drm/amd/amdgpu: Drop print_status callbacks.
  drm/amd/powerplay: revise reading/writing pptable on Polaris10
  drm/amd/powerplay: revise reading/writing pptable on Tonga
  drm/amd/powerplay: revise reading/writing pptable on Fiji
  drm/amd/powerplay: revise caching the soft pptable and add it's size
  drm/amd/powerplay: add dpm force multiple levels on cz/tonga/fiji/polaris (v2)
  drm/amd/powerplay: fix fan speed percent setting error on Polaris10
  drm/amd/powerplay: fix bug dpm can't work when resume back on Polaris
  ...

8 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Fri, 6 May 2016 03:48:35 +0000 (20:48 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge fixes from Andrew Morton:
 "14 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  byteswap: try to avoid __builtin_constant_p gcc bug
  lib/stackdepot: avoid to return 0 handle
  mm: fix kcompactd hang during memory offlining
  modpost: fix module autoloading for OF devices with generic compatible property
  proc: prevent accessing /proc/<PID>/environ until it's ready
  mm/zswap: provide unique zpool name
  mm: thp: kvm: fix memory corruption in KVM with THP enabled
  MAINTAINERS: fix Rajendra Nayak's address
  mm, cma: prevent nr_isolated_* counters from going negative
  mm: update min_free_kbytes from khugepaged after core initialization
  huge pagecache: mmap_sem is unlocked when truncation splits pmd
  rapidio/mport_cdev: fix uapi type definitions
  mm: memcontrol: let v2 cgroups follow changes in system swappiness
  mm: thp: correct split_huge_pages file permission