commit 564d8a2cf3 upstream.
The late 2009, 27 inch Apple iMac10,1 has an
internal eDP display and an external Mini-
Displayport output, driven by a DCE-3.2, RV730
Radeon Mobility HD-4670.
The machine worked fine in a dual-display setup
with eDP panel + externally connected HDMI
or DVI-D digital display sink, connected via
MiniDP to DVI or HDMI adapter.
However, booting the machine single-display with
only eDP panel results in a completely black
display - even backlight powering off, as soon as
the radeon modesetting driver loads.
This patch fixes the single dispay eDP case by
assigning encoders based on dig->linkb, similar
to DCE-4+. While this should not be generally
necessary (Alex: "...atom on normal boards
should be able to handle any mapping."), Apple
seems to use some special routing here.
One remaining problem not solved by this patch
is that an external Minidisplayport->DP sink
does still not work on iMac10,1, whereas external
DVI and HDMI sinks continue to work.
The problem affects at least all tested kernels
since Linux 3.13 - didn't test earlier kernels, so
backporting to stable probably makes sense.
v2: With the original patch from 2016, Alex was worried it
will break other DCE3.2 systems. Use dmi_match() to
apply this special encoder assignment only for the
Apple iMac 10,1 from late 2009.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 3546fb0cda ]
After rollover of the IOVA space, we want to get a low IOVA address,
otherwise the the games we play by remembering the last IOVA are
pointless. When we search for a free hole with DRM_MM_SEARCH_DEFAULT,
drm_mm will pop the next entry from the free holes stack, which will
likely be a high IOVA. By using DRM_MM_SEARCH_BELOW we can trick
drm_mm into reversing the search and provide us with a low IOVA.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Wladimir van der Laan <laanwj@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit c5f21c9f87 ]
Return success when the ring is properly initialized, otherwise return
failure.
Tonga SRIOV VF doesn't have UVD and VCE engines, the initialization of
these IPs is bypassed. The system crashes if application submit IB to
their rings which are not ready to use. It could be a common issue if
IP having ring buffer is disabled for some reason on specific ASIC, so
it should check the ring being ready to use.
Bug: amdgpu_test crashes system on Tonga VF.
Signed-off-by: Ding Pixel <Pixel.Ding@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 82fcee526b upstream.
The hash table created during vmw_cmdbuf_res_man_create was
never freed. This causes memory leak in context creation.
Added the corresponding drm_ht_remove in vmw_cmdbuf_res_man_destroy.
Tested for memory leak by running piglit overnight and kernel
memory is not inflated which earlier was.
Signed-off-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 71f677a910 upstream.
The ast driver configures a window to enable access into BMC
memory space in order to read some configuration registers.
If this window is disabled, which it can be from the BMC side,
the ast driver can't function.
Closing this window is a necessity for security if a machine's
host side and BMC side are controlled by different parties;
i.e. a cloud provider offering machines "bare metal".
A recent patch went in to try to check if that window is open
but it does so by trying to access the registers in question
and testing if the result is 0xffffffff.
This method will trigger a PCIe error when the window is closed
which on some systems will be fatal (it will trigger an EEH
for example on POWER which will take out the device).
This patch improves this in two ways:
- First, if the firmware has put properties in the device-tree
containing the relevant configuration information, we use these.
- Otherwise, a bit in one of the SCU scratch registers (which
are readable via the VGA register space and writeable by the BMC)
will indicate if the BMC has closed the window. This bit has been
defined by Y.C Chen from Aspeed.
If the window is closed and the configuration isn't available from
the device-tree, some sane defaults are used. Those defaults are
hopefully sufficient for standard video modes used on a server.
Signed-off-by: Russell Currey <ruscur@russell.cc>
Acked-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Cc: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 014580ffab upstream.
mtk_hdmi_setup_vendor_specific_infoframe will return before handle
mtk_hdmi_hw_send_info_frame.Because hdmi_vendor_infoframe_pack
returns the number of bytes packed into the binary buffer or
a negative error code on failure.
So correct it.
Fixes: 8f83f26891 ("drm/mediatek: Add HDMI support")
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8f4d38099b upstream.
The scanline counter is bonkers on VLV/CHV DSI. The scanline counter
increment is not lined up with the start of vblank like it is on
every other platform and output type. This causes problems for
both the vblank timestamping and atomic update vblank evasion.
On my FFRD8 machine at least, the scanline counter increment
happens about 1/3 of a scanline ahead of the start of vblank (which
is where all register latching happens still). That means we can't
trust the scanline counter to tell us whether we're in vblank or not
while we're on that particular line. In order to keep vblank
timestamping in working condition when called from the vblank irq,
we'll leave scanline_offset at one, which means that the entire
line containing the start of vblank is considered to be inside
the vblank.
For the vblank evasion we'll need to consider that entire line
to be bad, since we can't tell whether the registers already
got latched or not. And we can't actually use the start of vblank
interrupt to get us past that line as the interrupt would fire
too soon, and then we'd up waiting for the next start of vblank
instead. One way around that would using the frame start
interrupt instead since that wouldn't fire until the next
scanline, but that would require some bigger changes in the
interrupt code. So for simplicity we'll just poll until we get
past the bad line.
v2: Adjust the comments a bit
Cc: Jonas Aaberg <cja@gmx.net>
Tested-by: Jonas Aaberg <cja@gmx.net>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99086
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20161215174734.28779-1-ville.syrjala@linux.intel.com
Tested-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
(cherry picked from commit ec1b4ee283)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 6c971c09f3 ]
The original ast driver will access some BMC configuration through P2A bridge
that can be disabled since AST2300 and after.
It will cause system hanged if P2A bridge is disabled.
Here is the update to fix it.
Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 9a2eba337c ]
Commit cae9ff036e effectively disabled the drm poll_helper by checking
the wrong flag to see if the driver should enable the poll or not:
mode_config.poll_enabled is only set to true by poll_init and it is not
indicating if the poll is enabled or not.
nouveau_display_create() will initialize the poll and going to disable it
right away. After poll_init() the mode_config.poll_enabled will be true,
but the poll itself is disabled.
To avoid the race caused by calling the poll_enable() from different paths,
this patch will enable the poll from one place, in the
nouveau_display_hpd_work().
In case the pm_runtime is disabled we will enable the poll in
nouveau_drm_load() once.
Fixes: cae9ff036e ("drm/nouveau: Don't enabling polling twice on runtime resume")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Reviewed-by: Lyude <lyude@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit cae9ff036e ]
As it turns out, on cards that actually have CRTCs on them we're already
calling drm_kms_helper_poll_enable(drm_dev) from
nouveau_display_resume() before we call it in
nouveau_pmops_runtime_resume(). This leads us to accidentally trying to
enable polling twice, which results in a potential deadlock between the
RPM locks and drm_dev->mode_config.mutex if we end up trying to enable
polling the second time while output_poll_execute is running and holding
the mode_config lock. As such, make sure we only enable polling in
nouveau_pmops_runtime_resume() if we need to.
This fixes hangs observed on the ThinkPad W541
Signed-off-by: Lyude <lyude@redhat.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Kilian Singer <kilian.singer@quantumtechnology.info>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: David Airlie <airlied@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 15266ae38f ]
Resuming from RPM can happen while already holding
dev->mode_config.mutex. This means we can't actually handle fbcon in
any RPM resume workers, since restoring fbcon requires grabbing
dev->mode_config.mutex again. So move the fbcon suspend/resume code into
it's own worker, and rely on that instead to avoid deadlocking.
This fixes more deadlocks for runtime suspending the GPU on the ThinkPad
W541. Reproduction recipe:
- Get a machine with both optimus and a nvidia card with connectors
attached to it
- Wait for the nvidia GPU to suspend
- Attempt to manually reprobe any of the connectors on the nvidia GPU
using sysfs
- *deadlock*
[airlied: use READ_ONCE to address Hans's comment]
Signed-off-by: Lyude <lyude@redhat.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Kilian Singer <kilian.singer@quantumtechnology.info>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: David Airlie <airlied@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 81280d0e24 ]
We need to call drm_helper_hpd_irq_event() on resume to properly detect
monitor connection / disconnection on some laptops. For runtime-resume
(which gets called on resume from normal suspend too) we must call
drm_helper_hpd_irq_event() from a workqueue to avoid a deadlock.
Rename acpi_work to hpd_work, and move it out of the #ifdef CONFIG_ACPI
blocks to make it suitable for generic work.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 3a6536c51d ]
Various notebooks with nvidia GPUs generate an ACPI_VIDEO_NOTIFY_PROBE
acpi-video event when an external device gets plugged in (and again on
modesets on that connector), the default behavior in the acpi-video
driver for this is to send a KEY_SWITCHVIDEOMODE evdev event, which
causes e.g. gnome-settings-daemon to ask us to rescan the connectors
(good), but also causes g-s-d to switch to mirror mode on a newly plugged
monitor rather then using the monitor to extend the desktop (bad)
as KEY_SWITCHVIDEOMODE is supposed to switch between extend the desktop
vs mirror mode.
More troublesome are the repeated ACPI_VIDEO_NOTIFY_PROBE events on
changing the mode on the connector, which cause g-s-d to switch
between mirror/extend mode, which causes a new ACPI_VIDEO_NOTIFY_PROBE
event and we end up with an endless loop.
This commit fixes this by adding an acpi notifier block handler to
nouveau_display.c to intercept ACPI_VIDEO_NOTIFY_PROBE and:
1) Wake-up runtime suspended GPUs and call drm_helper_hpd_irq_event()
on them, this is necessary in some cases for the GPU to detect connector
hotplug events while runtime suspended
2) Return NOTIFY_BAD to stop acpi-video from emitting a bogus
KEY_SWITCHVIDEOMODE key-press event
There already is another acpi notifier block handler registered in
drivers/gpu/drm/nouveau/nvkm/engine/device/acpi.c, but that is not
suitable since that one gets unregistered on runtime suspend, and
we also want to intercept ACPI_VIDEO_NOTIFY_PROBE when runtime suspended.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 39cb2c9a31 ]
I've seen this trigger twice now, where the i915_gem_object_to_ggtt()
call in intel_unpin_fb_obj() returns NULL, resulting in an oops
immediately afterwards as the (inlined) call to i915_vma_unpin_fence()
tries to dereference it.
It seems to be some race condition where the object is going away at
shutdown time, since both times happened when shutting down the X
server. The call chains were different:
- VT ioctl(KDSETMODE, KD_TEXT):
intel_cleanup_plane_fb+0x5b/0xa0 [i915]
drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper]
intel_atomic_commit_tail+0x749/0xfe0 [i915]
intel_atomic_commit+0x3cb/0x4f0 [i915]
drm_atomic_commit+0x4b/0x50 [drm]
restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper]
drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper]
drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper]
intel_fbdev_set_par+0x18/0x70 [i915]
fb_set_var+0x236/0x460
fbcon_blank+0x30f/0x350
do_unblank_screen+0xd2/0x1a0
vt_ioctl+0x507/0x12a0
tty_ioctl+0x355/0xc30
do_vfs_ioctl+0xa3/0x5e0
SyS_ioctl+0x79/0x90
entry_SYSCALL_64_fastpath+0x13/0x94
- i915 unpin_work workqueue:
intel_unpin_work_fn+0x58/0x140 [i915]
process_one_work+0x1f1/0x480
worker_thread+0x48/0x4d0
kthread+0x101/0x140
and this patch purely papers over the issue by adding a NULL pointer
check and a WARN_ON_ONCE() to avoid the oops that would then generally
make the machine unresponsive.
Other callers of i915_gem_object_to_ggtt() seem to also check for the
returned pointer being NULL and warn about it, so this clearly has
happened before in other places.
[ Reported it originally to the i915 developers on Jan 8, applying the
ugly workaround on my own now after triggering the problem for the
second time with no feedback.
This is likely to be the same bug reported as
https://bugs.freedesktop.org/show_bug.cgi?id=98829https://bugs.freedesktop.org/show_bug.cgi?id=99134
which has a patch for the underlying problem, but it hasn't gotten to
me, so I'm applying the workaround. ]
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit e6e7b48b29 ]
I was under the misconception that the sysfs dev stuff can be fully
set up, and then registered all in one step with device_add. That's
true for properties and property groups, but not for parents and child
devices. Those must be fully registered before you can register a
child.
Add a bit of tracking to make sure that asynchronous mst connector
hotplugging gets this right. For consistency we rely upon the implicit
barriers of the connector->mutex, which is taken anyway, to ensure
that at least either the connector or device registration call will
work out.
Mildly tested since I can't reliably reproduce this on my mst box
here.
Reported-by: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 6ab92afc95 upstream.
Since
commit bac2a909a0
Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Wed Jan 21 02:17:42 2015 +0100
PCI / PM: Avoid resuming PCI devices during system suspend
PCI devices will default to allowing the system suspend complete
optimization where devices are not woken up during system suspend if
they were already runtime suspended. This however breaks the i915/HDA
drivers for two reasons:
- The i915 driver has system suspend specific steps that it needs to
run, that bring the device to a different state than its runtime
suspended state.
- The HDA driver's suspend handler requires power that it will request
from the i915 driver's power domain handler. This in turn requires the
i915 driver to runtime resume itself, but this won't be possible if the
suspend complete optimization is in effect: in this case the i915
runtime PM is disabled and trying to get an RPM reference returns
-EACCESS.
Solve this by requiring the PCI/PM core to resume the device during
system suspend which in effect disables the suspend complete optimization.
Regardless of the above commit the optimization stayed disabled for DRM
devices until
commit d14d2a8453
Author: Lukas Wunner <lukas@wunner.de>
Date: Wed Jun 8 12:49:29 2016 +0200
drm: Remove dev_pm_ops from drm_class
so this patch is in practice a fix for this commit. Another reason for
the bug staying hidden for so long is that the optimization for a device
is disabled if it's disabled for any of its children devices. i915 may
have a backlight device as its child which doesn't support runtime PM
and so doesn't allow the optimization either. So if this backlight
device got registered the bug stayed hidden.
Credits to Marta, Tomi and David who enabled pstore logging,
that caught one instance of this issue across a suspend/
resume-to-ram and Ville who rememberd that the optimization was enabled
for some devices at one point.
The first WARN triggered by the problem:
[ 6250.746445] WARNING: CPU: 2 PID: 17384 at drivers/gpu/drm/i915/intel_runtime_pm.c:2846 intel_runtime_pm_get+0x6b/0xd0 [i915]
[ 6250.746448] pm_runtime_get_sync() failed: -13
[ 6250.746451] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul
snd_hda_codec_realtek snd_hda_codec_generic ghash_clmulni_intel e1000e snd_hda_codec snd_hwdep snd_hda_core ptp mei_me pps_core snd_pcm lpc_ich mei prime_
numbers i2c_hid i2c_designware_platform i2c_designware_core [last unloaded: i915]
[ 6250.746512] CPU: 2 PID: 17384 Comm: kworker/u8:0 Tainted: G U W 4.11.0-rc5-CI-CI_DRM_334+ #1
[ 6250.746515] Hardware name: /NUC5i5RYB, BIOS RYBDWi35.86A.0362.2017.0118.0940 01/18/2017
[ 6250.746521] Workqueue: events_unbound async_run_entry_fn
[ 6250.746525] Call Trace:
[ 6250.746530] dump_stack+0x67/0x92
[ 6250.746536] __warn+0xc6/0xe0
[ 6250.746542] ? pci_restore_standard_config+0x40/0x40
[ 6250.746546] warn_slowpath_fmt+0x46/0x50
[ 6250.746553] ? __pm_runtime_resume+0x56/0x80
[ 6250.746584] intel_runtime_pm_get+0x6b/0xd0 [i915]
[ 6250.746610] intel_display_power_get+0x1b/0x40 [i915]
[ 6250.746646] i915_audio_component_get_power+0x15/0x20 [i915]
[ 6250.746654] snd_hdac_display_power+0xc8/0x110 [snd_hda_core]
[ 6250.746661] azx_runtime_resume+0x218/0x280 [snd_hda_intel]
[ 6250.746667] pci_pm_runtime_resume+0x76/0xa0
[ 6250.746672] __rpm_callback+0xb4/0x1f0
[ 6250.746677] ? pci_restore_standard_config+0x40/0x40
[ 6250.746682] rpm_callback+0x1f/0x80
[ 6250.746686] ? pci_restore_standard_config+0x40/0x40
[ 6250.746690] rpm_resume+0x4ba/0x740
[ 6250.746698] __pm_runtime_resume+0x49/0x80
[ 6250.746703] pci_pm_suspend+0x57/0x140
[ 6250.746709] dpm_run_callback+0x6f/0x330
[ 6250.746713] ? pci_pm_freeze+0xe0/0xe0
[ 6250.746718] __device_suspend+0xf9/0x370
[ 6250.746724] ? dpm_watchdog_set+0x60/0x60
[ 6250.746730] async_suspend+0x1a/0x90
[ 6250.746735] async_run_entry_fn+0x34/0x160
[ 6250.746741] process_one_work+0x1f2/0x6d0
[ 6250.746749] worker_thread+0x49/0x4a0
[ 6250.746755] kthread+0x107/0x140
[ 6250.746759] ? process_one_work+0x6d0/0x6d0
[ 6250.746763] ? kthread_create_on_node+0x40/0x40
[ 6250.746768] ret_from_fork+0x2e/0x40
[ 6250.746778] ---[ end trace 102a62fd2160f5e6 ]---
v2:
- Use the new pci_dev->needs_resume flag, to avoid any overhead during
the ->pm_prepare hook. (Rafael)
v3:
- Update commit message to reference the actual regressing commit.
(Lukas)
v4:
- Rebase on v4 of patch 1/2.
Fixes: d14d2a8453 ("drm: Remove dev_pm_ops from drm_class")
References: https://bugs.freedesktop.org/show_bug.cgi?id=100378
References: https://bugs.freedesktop.org/show_bug.cgi?id=100770
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Marta Lofstedt <marta.lofstedt@intel.com>
Cc: David Weinehall <david.weinehall@linux.intel.com>
Cc: Tomi Sarvela <tomi.p.sarvela@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-and-tested-by: Marta Lofstedt <marta.lofstedt@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1493726649-32094-2-git-send-email-imre.deak@intel.com
(cherry picked from commit adfdf85d79)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b4e382ca75 upstream.
Reusing the list_head for both is a bad idea. Callback execution is done
with the lock dropped so that alarms can be rescheduled from the callback,
which means that with some unfortunate timing, lists can get corrupted.
The execution list should not require its own locking, the single function
that uses it can only be called from a single context.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 07678eca2c upstream.
When vmw_gb_surface_define_ioctl() is called with an existing buffer,
we end up returning an uninitialized variable in the backup_handle.
The fix is to first initialize backup_handle to 0 just to be sure, and
second, when a user-provided buffer is found, we will use the
req->buffer_handle as the backup_handle.
Reported-by: Murray McAllister <murray.mcallister@insomniasec.com>
Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 75fb636324 upstream.
commit a39be606f9 ("drm: Do a full device unregister when unplugging")
causes backtraces like this one when unplugging an usb drm device while
it is in use:
usb 2-3: USB disconnect, device number 25
------------[ cut here ]------------
WARNING: CPU: 0 PID: 242 at drivers/gpu/drm/drm_mode_config.c:424
drm_mode_config_cleanup+0x220/0x280 [drm]
...
RIP: 0010:drm_mode_config_cleanup+0x220/0x280 [drm]
...
Call Trace:
gm12u320_modeset_cleanup+0xe/0x10 [gm12u320]
gm12u320_driver_unload+0x35/0x70 [gm12u320]
drm_dev_unregister+0x3c/0xe0 [drm]
drm_unplug_dev+0x12/0x60 [drm]
gm12u320_usb_disconnect+0x36/0x40 [gm12u320]
usb_unbind_interface+0x72/0x280
device_release_driver_internal+0x158/0x210
device_release_driver+0x12/0x20
bus_remove_device+0x104/0x180
device_del+0x1d2/0x350
usb_disable_device+0x9f/0x270
usb_disconnect+0xc6/0x260
...
[drm:drm_mode_config_cleanup [drm]] *ERROR* connector Unknown-1 leaked!
------------[ cut here ]------------
WARNING: CPU: 0 PID: 242 at drivers/gpu/drm/drm_mode_config.c:458
drm_mode_config_cleanup+0x268/0x280 [drm]
...
<same Call Trace>
---[ end trace 80df975dae439ed6 ]---
general protection fault: 0000 [#1] SMP
...
Call Trace:
? __switch_to+0x225/0x450
drm_mode_rmfb_work_fn+0x55/0x70 [drm]
process_one_work+0x193/0x3c0
worker_thread+0x4a/0x3a0
...
RIP: drm_framebuffer_remove+0x62/0x3f0 [drm] RSP: ffffb776c39dfd98
---[ end trace 80df975dae439ed7 ]---
After which the system is unusable this is caused by drm_dev_unregister
getting called immediately on unplug, which calls the drivers unload
function which calls drm_mode_config_cleanup which removes the framebuffer
object while userspace is still holding a reference to it.
Reverting commit a39be606f9 ("drm: Do a full device unregister
when unplugging") leads to the following oops on unplug instead,
when userspace closes the last fd referencing the drm_dev:
sysfs group 'power' not found for kobject 'card1-Unknown-1'
------------[ cut here ]------------
WARNING: CPU: 0 PID: 2459 at fs/sysfs/group.c:237
sysfs_remove_group+0x80/0x90
...
RIP: 0010:sysfs_remove_group+0x80/0x90
...
Call Trace:
dpm_sysfs_remove+0x57/0x60
device_del+0xfd/0x350
device_unregister+0x1a/0x60
drm_sysfs_connector_remove+0x39/0x50 [drm]
drm_connector_unregister+0x5a/0x70 [drm]
drm_connector_unregister_all+0x45/0xa0 [drm]
drm_modeset_unregister_all+0x12/0x30 [drm]
drm_dev_unregister+0xca/0xe0 [drm]
drm_put_dev+0x32/0x60 [drm]
drm_release+0x2f3/0x380 [drm]
__fput+0xdf/0x1e0
...
---[ end trace ecfb91ac85688bbe ]---
BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8
IP: down_write+0x1f/0x40
...
Call Trace:
debugfs_remove_recursive+0x55/0x1b0
drm_debugfs_connector_remove+0x21/0x40 [drm]
drm_connector_unregister+0x62/0x70 [drm]
drm_connector_unregister_all+0x45/0xa0 [drm]
drm_modeset_unregister_all+0x12/0x30 [drm]
drm_dev_unregister+0xca/0xe0 [drm]
drm_put_dev+0x32/0x60 [drm]
drm_release+0x2f3/0x380 [drm]
__fput+0xdf/0x1e0
...
---[ end trace ecfb91ac85688bbf ]---
This is caused by the revert moving back to drm_unplug_dev calling
drm_minor_unregister which does:
device_del(minor->kdev);
dev_set_drvdata(minor->kdev, NULL); /* safety belt */
drm_debugfs_cleanup(minor);
Causing the sysfs entries to already be removed even though we still
have references to them in e.g. drm_connector.
Note we must call drm_minor_unregister to notify userspace of the unplug
of the device, so calling drm_dev_unregister is not completely wrong the
problem is that drm_dev_unregister does too much.
This commit fixes drm_unplug_dev by not only reverting
commit a39be606f9 ("drm: Do a full device unregister when unplugging")
but by also adding a call to drm_modeset_unregister_all before the
drm_minor_unregister calls to make sure all sysfs entries are removed
before calling device_del(minor->kdev) thereby also fixing the second
set of oopses caused by just reverting the commit.
Fixes: a39be606f9 ("drm: Do a full device unregister when unplugging")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jeffy <jeffy.chen@rock-chips.com>
Cc: Marco Diego Aurélio Mesquita <marcodiegomesquita@gmail.com>
Reported-by: Marco Diego Aurélio Mesquita <marcodiegomesquita@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170601115430.4113-1-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 51964e9e12 upstream.
vram_size is supposed to be the total amount of VRAM that can be used by
userspace, which corresponds to the TTM VRAM manager size (which is
normally the full amount of VRAM, but can be just the visible VRAM when
DMA can't be used for BO migration for some reason).
The above was incorrectly used for vram_visible before, resulting in
generally too large values being reported.
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 3d18e33735 upstream.
We end up reading the interrupt register for HPD5, and then writing it
to HPD6 which on systems without anything using HPD5 results in
permanently disabling hotplug on one of the display outputs after the
first time we acknowledge a hotplug interrupt from the GPU.
This code is really bad. But for now, let's just fix this. I will
hopefully have a large patch series to refactor all of this soon.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Lyude <lyude@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
