linux-stable.git/drivers/gpu, branch v4.9.181 Linux kernel stable tree drm/radeon: prefer lower reference dividers 2019-06-11T10:22:48+00:00 Christian König christian.koenig@amd.com 2019-05-06T17:57:52+00:00 0fe34f9f03ee7cefacb8dfa240fb15aa5f0b65b6 commit 2e26ccb119bde03584be53406bbd22e711b0d6e6 upstream. Instead of the closest reference divider prefer the lowest, this fixes flickering issues on HP Compaq nx9420. Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=108514 Suggested-by: Paul Dufresne <dufresnep@gmail.com> Signed-off-by: Christian König <christian.koenig@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 2e26ccb119bde03584be53406bbd22e711b0d6e6 upstream.

Instead of the closest reference divider prefer the lowest,
this fixes flickering issues on HP Compaq nx9420.

Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=108514
Suggested-by: Paul Dufresne <dufresnep@gmail.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm/gma500/cdv: Check vbt config bits when detecting lvds panels 2019-06-11T10:22:48+00:00 Patrik Jakobsson patrik.r.jakobsson@gmail.com 2019-04-16T11:46:07+00:00 7402b5b13d17c03997d4e556928da8adb81be310 commit 7c420636860a719049fae9403e2c87804f53bdde upstream. Some machines have an lvds child device in vbt even though a panel is not attached. To make detection more reliable we now also check the lvds config bits available in the vbt. Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1665766 Cc: stable@vger.kernel.org Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190416114607.1072-1-patrik.r.jakobsson@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 7c420636860a719049fae9403e2c87804f53bdde upstream.

Some machines have an lvds child device in vbt even though a panel is
not attached. To make detection more reliable we now also check the lvds
config bits available in the vbt.

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1665766
Cc: stable@vger.kernel.org
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190416114607.1072-1-patrik.r.jakobsson@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm/vmwgfx: Don't send drm sysfs hotplug events on initial master set 2019-06-11T10:22:43+00:00 Thomas Hellstrom thellstrom@vmware.com 2019-05-07T09:07:53+00:00 d5a7e73e43ddf733a40de5fc08fe66d898810076 commit 63cb44441826e842b7285575b96db631cc9f2505 upstream. This may confuse user-space clients like plymouth that opens a drm file descriptor as a result of a hotplug event and then generates a new event... Cc: <stable@vger.kernel.org> Fixes: 5ea1734827bb ("drm/vmwgfx: Send a hotplug event at master_set") Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Deepak Rawat <drawat@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 63cb44441826e842b7285575b96db631cc9f2505 upstream.

This may confuse user-space clients like plymouth that opens a drm
file descriptor as a result of a hotplug event and then generates a
new event...

Cc: <stable@vger.kernel.org>
Fixes: 5ea1734827bb ("drm/vmwgfx: Send a hotplug event at master_set")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm/nouveau/i2c: Disable i2c bus access after ->fini() 2019-06-11T10:22:41+00:00 Lyude Paul lyude@redhat.com 2019-04-09T20:23:30+00:00 1bf3c11305f4bfea61fb7610bbe2a919333504ea commit 342406e4fbba9a174125fbfe6aeac3d64ef90f76 upstream. For a while, we've had the problem of i2c bus access not grabbing a runtime PM ref when it's being used in userspace by i2c-dev, resulting in nouveau spamming the kernel log with errors if anything attempts to access the i2c bus while the GPU is in runtime suspend. An example: [ 130.078386] nouveau 0000:01:00.0: i2c: aux 000d: begin idle timeout ffffffff Since the GPU is in runtime suspend, the MMIO region that the i2c bus is on isn't accessible. On x86, the standard behavior for accessing an unavailable MMIO region is to just return ~0. Except, that turned out to be a lie. While computers with a clean concious will return ~0 in this scenario, some machines will actually completely hang a CPU on certian bad MMIO accesses. This was witnessed with someone's Lenovo ThinkPad P50, where sensors-detect attempting to access the i2c bus while the GPU was suspended would result in a CPU hang: CPU: 5 PID: 12438 Comm: sensors-detect Not tainted 5.0.0-0.rc4.git3.1.fc30.x86_64 #1 Hardware name: LENOVO 20EQS64N17/20EQS64N17, BIOS N1EET74W (1.47 ) 11/21/2017 RIP: 0010:ioread32+0x2b/0x30 Code: 81 ff ff ff 03 00 77 20 48 81 ff 00 00 01 00 76 05 0f b7 d7 ed c3 48 c7 c6 e1 0c 36 96 e8 2d ff ff ff b8 ff ff ff ff c3 8b 07 <c3> 0f 1f 40 00 49 89 f0 48 81 fe ff ff 03 00 76 04 40 88 3e c3 48 RSP: 0018:ffffaac3c5007b48 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13 RAX: 0000000001111000 RBX: 0000000001111000 RCX: 0000043017a97186 RDX: 0000000000000aaa RSI: 0000000000000005 RDI: ffffaac3c400e4e4 RBP: ffff9e6443902c00 R08: ffffaac3c400e4e4 R09: ffffaac3c5007be7 R10: 0000000000000004 R11: 0000000000000001 R12: ffff9e6445dd0000 R13: 000000000000e4e4 R14: 00000000000003c4 R15: 0000000000000000 FS: 00007f253155a740(0000) GS:ffff9e644f600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005630d1500358 CR3: 0000000417c44006 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: g94_i2c_aux_xfer+0x326/0x850 [nouveau] nvkm_i2c_aux_i2c_xfer+0x9e/0x140 [nouveau] __i2c_transfer+0x14b/0x620 i2c_smbus_xfer_emulated+0x159/0x680 ? _raw_spin_unlock_irqrestore+0x1/0x60 ? rt_mutex_slowlock.constprop.0+0x13d/0x1e0 ? __lock_is_held+0x59/0xa0 __i2c_smbus_xfer+0x138/0x5a0 i2c_smbus_xfer+0x4f/0x80 i2cdev_ioctl_smbus+0x162/0x2d0 [i2c_dev] i2cdev_ioctl+0x1db/0x2c0 [i2c_dev] do_vfs_ioctl+0x408/0x750 ksys_ioctl+0x5e/0x90 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x60/0x1e0 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f25317f546b Code: 0f 1e fa 48 8b 05 1d da 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ed d9 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc88caab68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00005630d0fe7260 RCX: 00007f25317f546b RDX: 00005630d1598e80 RSI: 0000000000000720 RDI: 0000000000000003 RBP: 00005630d155b968 R08: 0000000000000001 R09: 00005630d15a1da0 R10: 0000000000000070 R11: 0000000000000246 R12: 00005630d1598e80 R13: 00005630d12f3d28 R14: 0000000000000720 R15: 00005630d12f3ce0 watchdog: BUG: soft lockup - CPU#5 stuck for 23s! [sensors-detect:12438] Yikes! While I wanted to try to make it so that accessing an i2c bus on nouveau would wake up the GPU as needed, airlied pointed out that pretty much any usecase for userspace accessing an i2c bus on a GPU (mainly for the DDC brightness control that some displays have) is going to only be useful while there's at least one display enabled on the GPU anyway, and the GPU never sleeps while there's displays running. Since teaching the i2c bus to wake up the GPU on userspace accesses is a good deal more difficult than it might seem, mostly due to the fact that we have to use the i2c bus during runtime resume of the GPU, we instead opt for the easiest solution: don't let userspace access i2c busses on the GPU at all while it's in runtime suspend. Changes since v1: * Also disable i2c busses that run over DP AUX Signed-off-by: Lyude Paul <lyude@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 342406e4fbba9a174125fbfe6aeac3d64ef90f76 upstream.

For a while, we've had the problem of i2c bus access not grabbing
a runtime PM ref when it's being used in userspace by i2c-dev, resulting
in nouveau spamming the kernel log with errors if anything attempts to
access the i2c bus while the GPU is in runtime suspend. An example:

[  130.078386] nouveau 0000:01:00.0: i2c: aux 000d: begin idle timeout ffffffff

Since the GPU is in runtime suspend, the MMIO region that the i2c bus is
on isn't accessible. On x86, the standard behavior for accessing an
unavailable MMIO region is to just return ~0.

Except, that turned out to be a lie. While computers with a clean
concious will return ~0 in this scenario, some machines will actually
completely hang a CPU on certian bad MMIO accesses. This was witnessed
with someone's Lenovo ThinkPad P50, where sensors-detect attempting to
access the i2c bus while the GPU was suspended would result in a CPU
hang:

  CPU: 5 PID: 12438 Comm: sensors-detect Not tainted 5.0.0-0.rc4.git3.1.fc30.x86_64 #1
  Hardware name: LENOVO 20EQS64N17/20EQS64N17, BIOS N1EET74W (1.47 ) 11/21/2017
  RIP: 0010:ioread32+0x2b/0x30
  Code: 81 ff ff ff 03 00 77 20 48 81 ff 00 00 01 00 76 05 0f b7 d7 ed c3
  48 c7 c6 e1 0c 36 96 e8 2d ff ff ff b8 ff ff ff ff c3 8b 07 <c3> 0f 1f
  40 00 49 89 f0 48 81 fe ff ff 03 00 76 04 40 88 3e c3 48
  RSP: 0018:ffffaac3c5007b48 EFLAGS: 00000292 ORIG_RAX: ffffffffffffff13
  RAX: 0000000001111000 RBX: 0000000001111000 RCX: 0000043017a97186
  RDX: 0000000000000aaa RSI: 0000000000000005 RDI: ffffaac3c400e4e4
  RBP: ffff9e6443902c00 R08: ffffaac3c400e4e4 R09: ffffaac3c5007be7
  R10: 0000000000000004 R11: 0000000000000001 R12: ffff9e6445dd0000
  R13: 000000000000e4e4 R14: 00000000000003c4 R15: 0000000000000000
  FS:  00007f253155a740(0000) GS:ffff9e644f600000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00005630d1500358 CR3: 0000000417c44006 CR4: 00000000003606e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
   g94_i2c_aux_xfer+0x326/0x850 [nouveau]
   nvkm_i2c_aux_i2c_xfer+0x9e/0x140 [nouveau]
   __i2c_transfer+0x14b/0x620
   i2c_smbus_xfer_emulated+0x159/0x680
   ? _raw_spin_unlock_irqrestore+0x1/0x60
   ? rt_mutex_slowlock.constprop.0+0x13d/0x1e0
   ? __lock_is_held+0x59/0xa0
   __i2c_smbus_xfer+0x138/0x5a0
   i2c_smbus_xfer+0x4f/0x80
   i2cdev_ioctl_smbus+0x162/0x2d0 [i2c_dev]
   i2cdev_ioctl+0x1db/0x2c0 [i2c_dev]
   do_vfs_ioctl+0x408/0x750
   ksys_ioctl+0x5e/0x90
   __x64_sys_ioctl+0x16/0x20
   do_syscall_64+0x60/0x1e0
   entry_SYSCALL_64_after_hwframe+0x49/0xbe
  RIP: 0033:0x7f25317f546b
  Code: 0f 1e fa 48 8b 05 1d da 0c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff
  ff ff c3 66 0f 1f 44 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01
  f0 ff ff 73 01 c3 48 8b 0d ed d9 0c 00 f7 d8 64 89 01 48
  RSP: 002b:00007ffc88caab68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
  RAX: ffffffffffffffda RBX: 00005630d0fe7260 RCX: 00007f25317f546b
  RDX: 00005630d1598e80 RSI: 0000000000000720 RDI: 0000000000000003
  RBP: 00005630d155b968 R08: 0000000000000001 R09: 00005630d15a1da0
  R10: 0000000000000070 R11: 0000000000000246 R12: 00005630d1598e80
  R13: 00005630d12f3d28 R14: 0000000000000720 R15: 00005630d12f3ce0
  watchdog: BUG: soft lockup - CPU#5 stuck for 23s! [sensors-detect:12438]

Yikes! While I wanted to try to make it so that accessing an i2c bus on
nouveau would wake up the GPU as needed, airlied pointed out that pretty
much any usecase for userspace accessing an i2c bus on a GPU (mainly for
the DDC brightness control that some displays have) is going to only be
useful while there's at least one display enabled on the GPU anyway, and
the GPU never sleeps while there's displays running.

Since teaching the i2c bus to wake up the GPU on userspace accesses is a
good deal more difficult than it might seem, mostly due to the fact that
we have to use the i2c bus during runtime resume of the GPU, we instead
opt for the easiest solution: don't let userspace access i2c busses on
the GPU at all while it's in runtime suspend.

Changes since v1:
* Also disable i2c busses that run over DP AUX

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm: Wake up next in drm_read() chain if we are forced to putback the event 2019-05-31T13:48:31+00:00 Chris Wilson chris@chris-wilson.co.uk 2017-08-04T08:23:28+00:00 e658aba58f03a040586e5e12ad6ca20f3b1694e6 [ Upstream commit 60b801999c48b6c1dd04e653a38e2e613664264e ] After an event is sent, we try to copy it into the user buffer of the first waiter in drm_read() and if the user buffer doesn't have enough room we put it back onto the list. However, we didn't wake up any subsequent waiter, so that event may sit on the list until either a new vblank event is sent or a new waiter appears. Rare, but in the worst case may lead to a stuck process. Testcase: igt/drm_read/short-buffer-wakeup Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170804082328.17173-1-chris@chris-wilson.co.uk Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 60b801999c48b6c1dd04e653a38e2e613664264e ]

After an event is sent, we try to copy it into the user buffer of the
first waiter in drm_read() and if the user buffer doesn't have enough
room we put it back onto the list. However, we didn't wake up any
subsequent waiter, so that event may sit on the list until either a new
vblank event is sent or a new waiter appears. Rare, but in the worst
case may lead to a stuck process.

Testcase: igt/drm_read/short-buffer-wakeup
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170804082328.17173-1-chris@chris-wilson.co.uk
Signed-off-by: Sasha Levin <sashal@kernel.org>
gpu: ipu-v3: dp: fix CSC handling 2019-05-16T17:43:43+00:00 Lucas Stach l.stach@pengutronix.de 2019-04-12T15:59:40+00:00 952ef05cf67984f7b14b2e3372343bdf43ab8e8b [ Upstream commit d4fad0a426c6e26f48c9a7cdd21a7fe9c198d645 ] Initialize the flow input colorspaces to unknown and reset to that value when the channel gets disabled. This avoids the state getting mixed up with a previous mode. Also keep the CSC settings for the background flow intact when disabling the foreground flow. Root-caused-by: Jonathan Marek <jonathan@marek.ca> Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit d4fad0a426c6e26f48c9a7cdd21a7fe9c198d645 ]

Initialize the flow input colorspaces to unknown and reset to that value
when the channel gets disabled. This avoids the state getting mixed up
with a previous mode.

Also keep the CSC settings for the background flow intact when disabling
the foreground flow.

Root-caused-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drm/sun4i: Set device driver data at bind time for use in unbind 2019-05-16T17:43:43+00:00 Paul Kocialkowski paul.kocialkowski@bootlin.com 2019-04-18T13:27:26+00:00 cd7e3fd25e4bb6a3f337ed45e1614b8a069434ce [ Upstream commit 02b92adbe33e6dbd15dc6e32540b22f47c4ff0a2 ] Our sun4i_drv_unbind gets the drm device using dev_get_drvdata. However, that driver data is never set in sun4i_drv_bind. Set it there to avoid getting a NULL pointer at unbind time. Fixes: 9026e0d122ac ("drm: Add Allwinner A10 Display Engine support") Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190418132727.5128-3-paul.kocialkowski@bootlin.com Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 02b92adbe33e6dbd15dc6e32540b22f47c4ff0a2 ]

Our sun4i_drv_unbind gets the drm device using dev_get_drvdata.
However, that driver data is never set in sun4i_drv_bind.

Set it there to avoid getting a NULL pointer at unbind time.

Fixes: 9026e0d122ac ("drm: Add Allwinner A10 Display Engine support")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190418132727.5128-3-paul.kocialkowski@bootlin.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
drm/mediatek: fix possible object reference leak 2019-05-10T15:52:09+00:00 Wen Yang wen.yang99@zte.com.cn 2019-04-03T16:04:09+00:00 684a9e97ba19bfde873f245f8bb198625f9d3ba5 [ Upstream commit 2ae2c3316fb77dcf64275d011596b60104c45426 ] The call to of_parse_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: drivers/gpu/drm/mediatek/mtk_hdmi.c:1521:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function. drivers/gpu/drm/mediatek/mtk_hdmi.c:1524:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: CK Hu <ck.hu@mediatek.com> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: dri-devel@lists.freedesktop.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: CK Hu <ck.hu@mediatek.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 2ae2c3316fb77dcf64275d011596b60104c45426 ]

The call to of_parse_phandle returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
drivers/gpu/drm/mediatek/mtk_hdmi.c:1521:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function.
drivers/gpu/drm/mediatek/mtk_hdmi.c:1524:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1509, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drm/mediatek: Fix an error code in mtk_hdmi_dt_parse_pdata() 2019-05-10T15:52:08+00:00 Dan Carpenter dan.carpenter@oracle.com 2019-03-28T14:31:30+00:00 65dabcd68459e0debca3cbbb7e7610546ae3087a [ Upstream commit 2d85978341e6a32e7443d9f28639da254d53f400 ] We don't want to overwrite "ret", it already holds the correct error code. The "regmap" variable might be a valid pointer as this point. Fixes: 8f83f26891e1 ("drm/mediatek: Add HDMI support") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: CK Hu <ck.hu@mediatek.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 2d85978341e6a32e7443d9f28639da254d53f400 ]

We don't want to overwrite "ret", it already holds the correct error
code.  The "regmap" variable might be a valid pointer as this point.

Fixes: 8f83f26891e1 ("drm/mediatek: Add HDMI support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drm/vc4: Fix compilation error reported by kbuild test bot 2019-05-02T07:32:02+00:00 Maarten Lankhorst maarten.lankhorst@linux.intel.com 2019-04-24T15:06:29+00:00 ff0d081fba0f4d04ffae4c9b022b18b4a9ca16ef commit 462ce5d963f18b71c63f6b7730a35a2ee5273540 upstream. A pointer to crtc was missing, resulting in the following build error: drivers/gpu/drm/vc4/vc4_crtc.c:1045:44: sparse: sparse: incorrect type in argument 1 (different base types) drivers/gpu/drm/vc4/vc4_crtc.c:1045:44: sparse: expected struct drm_crtc *crtc drivers/gpu/drm/vc4/vc4_crtc.c:1045:44: sparse: got struct drm_crtc_state *state drivers/gpu/drm/vc4/vc4_crtc.c:1045:39: sparse: sparse: not enough arguments for function vc4_crtc_destroy_state Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reported-by: kbuild test robot <lkp@intel.com> Cc: Eric Anholt <eric@anholt.net> Link: https://patchwork.freedesktop.org/patch/msgid/2b6ed5e6-81b0-4276-8860-870b54ca3262@linux.intel.com Fixes: d08106796a78 ("drm/vc4: Fix memory leak during gpu reset.") Cc: <stable@vger.kernel.org> # v4.6+ Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 462ce5d963f18b71c63f6b7730a35a2ee5273540 upstream.

A pointer to crtc was missing, resulting in the following build error:
drivers/gpu/drm/vc4/vc4_crtc.c:1045:44: sparse: sparse: incorrect type in argument 1 (different base types)
drivers/gpu/drm/vc4/vc4_crtc.c:1045:44: sparse:    expected struct drm_crtc *crtc
drivers/gpu/drm/vc4/vc4_crtc.c:1045:44: sparse:    got struct drm_crtc_state *state
drivers/gpu/drm/vc4/vc4_crtc.c:1045:39: sparse: sparse: not enough arguments for function vc4_crtc_destroy_state

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/2b6ed5e6-81b0-4276-8860-870b54ca3262@linux.intel.com
Fixes: d08106796a78 ("drm/vc4: Fix memory leak during gpu reset.")
Cc: <stable@vger.kernel.org> # v4.6+
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>