linux-stable.git/drivers/gpu, branch v4.19.9 Linux kernel stable tree drm/i915: Downgrade Gen9 Plane WM latency error 2018-12-13T08:16:21+00:00 Chris Wilson chris@chris-wilson.co.uk 2018-07-26T16:15:27+00:00 1a90564078087a00aa4d07a559629b99dce46c4e commit 86c1c87d0e6241cbe35bd52badfc84b154e1b959 upstream. According to intel_read_wm_latency() it is perfectly legal for one WM and all subsequent levels to be 0 (and the deeper powersaving states disabled), so don't shout *ERROR*, over and over again. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Ville Syrjala <ville.syrjala@linux.intel.com> Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180726161527.10516-1-chris@chris-wilson.co.uk Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 86c1c87d0e6241cbe35bd52badfc84b154e1b959 upstream.

According to intel_read_wm_latency() it is perfectly legal for one WM
and all subsequent levels to be 0 (and the deeper powersaving states
disabled), so don't shout *ERROR*, over and over again.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180726161527.10516-1-chris@chris-wilson.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm/amdgpu/gmc8: always load MC firmware in the driver 2018-12-13T08:16:21+00:00 Alex Deucher alexander.deucher@amd.com 2018-11-29T04:28:17+00:00 e8a7f59e36437c63cab485577c255126c0819c5a commit b52b6738cc2d50d2a8f4d0095bcb5a86716008a5 upstream. Some power features rely on the driver loaded version so always load the MC firmware from the driver even if the vbios loaded a version already. Acked-by: Christian König <christian.koenig@amd.com> Reviewed-by: Junwei Zhang <Jerry.Zhang@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 b52b6738cc2d50d2a8f4d0095bcb5a86716008a5 upstream.

Some power features rely on the driver loaded version so always
load the MC firmware from the driver even if the vbios loaded
a version already.

Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@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/amdgpu/gmc8: update MC firmware for polaris 2018-12-13T08:16:21+00:00 Alex Deucher alexander.deucher@amd.com 2018-11-29T04:25:41+00:00 39bdb32876df3710825d33b5c455ec2ffa9db64e commit a81a7c9c9ea3042ab02d66ac35def74abf091c15 upstream. Some variants require different MC firmware images. Acked-by: Christian König <christian.koenig@amd.com> Reviewed-by: Junwei Zhang <Jerry.Zhang@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 a81a7c9c9ea3042ab02d66ac35def74abf091c15 upstream.

Some variants require different MC firmware images.

Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Junwei Zhang <Jerry.Zhang@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/msm: Move fence put to where failure occurs 2018-12-13T08:16:21+00:00 Robert Foss robert.foss@collabora.com 2018-11-05T10:13:12+00:00 2abdfe248369555f4656662feee2b71256b08268 commit 2189463dba3eac10d7264a40ede12fc1a3c06fb1 upstream. If dma_fence_wait fails to wait for a supplied in-fence in msm_ioctl_gem_submit, make sure we release that in-fence. Also remove this dma_fence_put() from the 'out' label. Signed-off-by: Robert Foss <robert.foss@collabora.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@vger.kernel.org Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 2189463dba3eac10d7264a40ede12fc1a3c06fb1 upstream.

If dma_fence_wait fails to wait for a supplied in-fence in
msm_ioctl_gem_submit, make sure we release that in-fence.

Also remove this dma_fence_put() from the 'out' label.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm/lease: Send a distinct uevent 2018-12-13T08:16:21+00:00 Daniel Vetter daniel.vetter@ffwll.ch 2018-11-29T09:42:26+00:00 318f6e599dcd31a8de5756e4a6e01012aa7669cb commit ce85882860f0e756f7066cbda1c43e8b50b73ab6 upstream. Sending the exact same hotplug event is not great uapi. Luckily the only already merged implementation of leases (in the -modesetting driver) doesn't care about what kind of uevent it gets, and unconditionally processes both hotplug and lease changes. So we can still adjust the uapi here. But e.g. weston tries to filter stuff, and I guess others might want to do that too. Try to make that possible. Cc: stable since it's uapi adjustement that we want to roll out everywhere. Michel Dänzer mentioned on irc that -amdgpu also has lease support. It has the same code flow as -modesetting though, so we can still go ahead. v2: Mention -amdgpu (Michel) Cc: Keith Packard <keithp@keithp.com> Cc: Dave Airlie <airlied@redhat.com> Cc: stable@vger.kernel.org Reviewed-by: Keith Packard <keithp@keithp.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181129094226.30591-1-daniel.vetter@ffwll.ch Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit ce85882860f0e756f7066cbda1c43e8b50b73ab6 upstream.

Sending the exact same hotplug event is not great uapi. Luckily the
only already merged implementation of leases (in the -modesetting
driver) doesn't care about what kind of uevent it gets, and
unconditionally processes both hotplug and lease changes. So we can
still adjust the uapi here.

But e.g. weston tries to filter stuff, and I guess others might want
to do that too. Try to make that possible. Cc: stable since it's uapi
adjustement that we want to roll out everywhere.

Michel Dänzer mentioned on irc that -amdgpu also has lease support. It
has the same code flow as -modesetting though, so we can still go
ahead.

v2: Mention -amdgpu (Michel)

Cc: Keith Packard <keithp@keithp.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181129094226.30591-1-daniel.vetter@ffwll.ch
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm/amdgpu: update mc firmware image for polaris12 variants 2018-12-13T08:16:21+00:00 Junwei Zhang Jerry.Zhang@amd.com 2018-11-22T09:53:00+00:00 fcf5d0dbfb7fbcf867ea9cf0c2added9205fbb2f commit d7fd67653f847327e545bdb198b901ee124afd7c upstream. Some new variants require updated firmware. Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com> Reviewed-by: Evan Quan <evan.quan@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 d7fd67653f847327e545bdb198b901ee124afd7c upstream.

Some new variants require updated firmware.

Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Reviewed-by: Evan Quan <evan.quan@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/amd/display: Support amdgpu "max bpc" connector property (v2) 2018-12-13T08:16:12+00:00 Nicholas Kazlauskas nicholas.kazlauskas@amd.com 2018-11-15T22:21:34+00:00 3374518d4d1ae021dc60885f4ea8dca0a3ca290f [ Upstream commit 07e3a1cfb0568b6d8d7862077029af96af6690ea ] [Why] Many panels support more than 8bpc but some modes are unavailable while running at greater than 8bpc due to DP/HDMI bandwidth constraints. Support for more than 8bpc was added recently in the driver but it defaults to the maximum supported bpc - locking out these modes. This should be a user configurable option such that the user can select what bpc configuration they would like. [How] This patch adds support for getting and setting the amdgpu driver specific "max bpc" property on the connector. It also adds support for limiting the output bpc based on the property value. The default limitation is the lowest value in the range, 8bpc. This was the old value before the range was uncapped. This patch should be updated/replaced later once common drm support for max bpc lands. Bugzilla: https://bugs.freedesktop.org/108542 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201585 Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200645 Fixes: e03fd3f300f6 ("drm/amd/display: Do not limit color depth to 8bpc") v2: rebase on upstream (Alex) Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 07e3a1cfb0568b6d8d7862077029af96af6690ea ]

[Why]
Many panels support more than 8bpc but some modes are unavailable while
running at greater than 8bpc due to DP/HDMI bandwidth constraints.

Support for more than 8bpc was added recently in the driver but it
defaults to the maximum supported bpc - locking out these modes.

This should be a user configurable option such that the user can select
what bpc configuration they would like.

[How]
This patch adds support for getting and setting the amdgpu driver
specific "max bpc" property on the connector.

It also adds support for limiting the output bpc based on the property
value. The default limitation is the lowest value in the range, 8bpc.
This was the old value before the range was uncapped.

This patch should be updated/replaced later once common drm support
for max bpc lands.

Bugzilla: https://bugs.freedesktop.org/108542
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=201585
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200645
Fixes: e03fd3f300f6 ("drm/amd/display: Do not limit color depth to 8bpc")

v2: rebase on upstream (Alex)

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drm/amdgpu: Add amdgpu "max bpc" connector property (v2) 2018-12-13T08:16:12+00:00 Nicholas Kazlauskas nicholas.kazlauskas@amd.com 2018-11-15T22:19:12+00:00 a0c25b4098b8de23f34f81860ddc3cbaaa159189 [ Upstream commit 69756c6ff0de478c10100481f16c966dde3b5339 ] [Why] Many panels support more than 8bpc but some modes are unavailable while running at greater than 8bpc due to DP/HDMI bandwidth constraints. Support for more than 8bpc was added recently in the driver but it defaults to the maximum supported bpc - locking out these modes. This should be a user configurable option such that the user can select what bpc configuration they would like. [How] This patch introduces the "max bpc" amdgpu driver specific connector property so the user can limit the maximum bpc. It ranges from 8 to 16. This doesn't directly set the preferred bpc for the panel since it follows Intel's existing driver conventions. This proprety should be removed once common drm support for max bpc lands. v2: rebase on upstream (Alex) Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <sashal@kernel.org> 
[ Upstream commit 69756c6ff0de478c10100481f16c966dde3b5339 ]

[Why]
Many panels support more than 8bpc but some modes are unavailable while
running at greater than 8bpc due to DP/HDMI bandwidth constraints.

Support for more than 8bpc was added recently in the driver but it
defaults to the maximum supported bpc - locking out these modes.

This should be a user configurable option such that the user can select
what bpc configuration they would like.

[How]
This patch introduces the "max bpc" amdgpu driver specific connector
property so the user can limit the maximum bpc. It ranges from 8 to 16.

This doesn't directly set the preferred bpc for the panel since it
follows Intel's existing driver conventions.

This proprety should be removed once common drm support for max bpc
lands.

v2: rebase on upstream (Alex)

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
drm/meson: Fix OOB memory accesses in meson_viu_set_osd_lut() 2018-12-08T11:59:08+00:00 Lyude Paul lyude@redhat.com 2018-11-25T01:21:17+00:00 212ad3d70222a7da4425306b7443c67239bce88b commit 97b2a3180a559a33852ac0cd77904166069484fd upstream. Currently on driver bringup with KASAN enabled, meson triggers an OOB memory access as shown below: [ 117.904528] ================================================================== [ 117.904560] BUG: KASAN: global-out-of-bounds in meson_viu_set_osd_lut+0x7a0/0x890 [ 117.904588] Read of size 4 at addr ffff20000a63ce24 by task systemd-udevd/498 [ 117.904601] [ 118.083372] CPU: 4 PID: 498 Comm: systemd-udevd Not tainted 4.20.0-rc3Lyude-Test+ #20 [ 118.091143] Hardware name: amlogic khadas-vim2/khadas-vim2, BIOS 2018.07-rc2-armbian 09/11/2018 [ 118.099768] Call trace: [ 118.102181] dump_backtrace+0x0/0x3e8 [ 118.105796] show_stack+0x14/0x20 [ 118.109083] dump_stack+0x130/0x1c4 [ 118.112539] print_address_description+0x60/0x25c [ 118.117214] kasan_report+0x1b4/0x368 [ 118.120851] __asan_report_load4_noabort+0x18/0x20 [ 118.125566] meson_viu_set_osd_lut+0x7a0/0x890 [ 118.129953] meson_viu_init+0x10c/0x290 [ 118.133741] meson_drv_bind_master+0x474/0x748 [ 118.138141] meson_drv_bind+0x10/0x18 [ 118.141760] try_to_bring_up_master+0x3d8/0x768 [ 118.146249] component_add+0x214/0x570 [ 118.149978] meson_dw_hdmi_probe+0x18/0x20 [meson_dw_hdmi] [ 118.155404] platform_drv_probe+0x98/0x138 [ 118.159455] really_probe+0x2a0/0xa70 [ 118.163070] driver_probe_device+0x1b4/0x2d8 [ 118.167299] __driver_attach+0x200/0x280 [ 118.171189] bus_for_each_dev+0x10c/0x1a8 [ 118.175144] driver_attach+0x38/0x50 [ 118.178681] bus_add_driver+0x330/0x608 [ 118.182471] driver_register+0x140/0x388 [ 118.186361] __platform_driver_register+0xc8/0x108 [ 118.191117] meson_dw_hdmi_platform_driver_init+0x1c/0x1000 [meson_dw_hdmi] [ 118.198022] do_one_initcall+0x12c/0x3bc [ 118.201883] do_init_module+0x1fc/0x638 [ 118.205673] load_module+0x4b4c/0x6808 [ 118.209387] __se_sys_init_module+0x2e8/0x3c0 [ 118.213699] __arm64_sys_init_module+0x68/0x98 [ 118.218100] el0_svc_common+0x104/0x210 [ 118.221893] el0_svc_handler+0x48/0xb8 [ 118.225594] el0_svc+0x8/0xc [ 118.228429] [ 118.229887] The buggy address belongs to the variable: [ 118.235007] eotf_33_linear_mapping+0x84/0xc0 [ 118.239301] [ 118.240752] Memory state around the buggy address: [ 118.245522] ffff20000a63cd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 118.252695] ffff20000a63cd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 118.259850] >ffff20000a63ce00: 00 00 00 00 04 fa fa fa fa fa fa fa 00 00 00 00 [ 118.267000] ^ [ 118.271222] ffff20000a63ce80: 00 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 [ 118.278393] ffff20000a63cf00: 00 00 00 00 00 00 00 00 00 00 00 00 04 fa fa fa [ 118.285542] ================================================================== [ 118.292699] Disabling lock debugging due to kernel taint It seems that when looping through the OSD EOTF LUT maps, we use the same max iterator for OETF: 20. This is wrong though, since 20*2 is 40, which means that we'll stop out of bounds on the EOTF maps. But, this whole thing is already confusing enough to read through as-is, so let's just replace all of the hardcoded sizes with OSD_(OETF/EOTF)_LUT_SIZE / 2. Signed-off-by: Lyude Paul <lyude@redhat.com> Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller") Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Maxime Ripard <maxime.ripard@bootlin.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: dri-devel@lists.freedesktop.org Cc: linux-amlogic@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Cc: <stable@vger.kernel.org> # v4.10+ Acked-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181125012117.31915-1-lyude@redhat.com Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 97b2a3180a559a33852ac0cd77904166069484fd upstream.

Currently on driver bringup with KASAN enabled, meson triggers an OOB
memory access as shown below:

[  117.904528] ==================================================================
[  117.904560] BUG: KASAN: global-out-of-bounds in meson_viu_set_osd_lut+0x7a0/0x890
[  117.904588] Read of size 4 at addr ffff20000a63ce24 by task systemd-udevd/498
[  117.904601]
[  118.083372] CPU: 4 PID: 498 Comm: systemd-udevd Not tainted 4.20.0-rc3Lyude-Test+ #20
[  118.091143] Hardware name: amlogic khadas-vim2/khadas-vim2, BIOS 2018.07-rc2-armbian 09/11/2018
[  118.099768] Call trace:
[  118.102181]  dump_backtrace+0x0/0x3e8
[  118.105796]  show_stack+0x14/0x20
[  118.109083]  dump_stack+0x130/0x1c4
[  118.112539]  print_address_description+0x60/0x25c
[  118.117214]  kasan_report+0x1b4/0x368
[  118.120851]  __asan_report_load4_noabort+0x18/0x20
[  118.125566]  meson_viu_set_osd_lut+0x7a0/0x890
[  118.129953]  meson_viu_init+0x10c/0x290
[  118.133741]  meson_drv_bind_master+0x474/0x748
[  118.138141]  meson_drv_bind+0x10/0x18
[  118.141760]  try_to_bring_up_master+0x3d8/0x768
[  118.146249]  component_add+0x214/0x570
[  118.149978]  meson_dw_hdmi_probe+0x18/0x20 [meson_dw_hdmi]
[  118.155404]  platform_drv_probe+0x98/0x138
[  118.159455]  really_probe+0x2a0/0xa70
[  118.163070]  driver_probe_device+0x1b4/0x2d8
[  118.167299]  __driver_attach+0x200/0x280
[  118.171189]  bus_for_each_dev+0x10c/0x1a8
[  118.175144]  driver_attach+0x38/0x50
[  118.178681]  bus_add_driver+0x330/0x608
[  118.182471]  driver_register+0x140/0x388
[  118.186361]  __platform_driver_register+0xc8/0x108
[  118.191117]  meson_dw_hdmi_platform_driver_init+0x1c/0x1000 [meson_dw_hdmi]
[  118.198022]  do_one_initcall+0x12c/0x3bc
[  118.201883]  do_init_module+0x1fc/0x638
[  118.205673]  load_module+0x4b4c/0x6808
[  118.209387]  __se_sys_init_module+0x2e8/0x3c0
[  118.213699]  __arm64_sys_init_module+0x68/0x98
[  118.218100]  el0_svc_common+0x104/0x210
[  118.221893]  el0_svc_handler+0x48/0xb8
[  118.225594]  el0_svc+0x8/0xc
[  118.228429]
[  118.229887] The buggy address belongs to the variable:
[  118.235007]  eotf_33_linear_mapping+0x84/0xc0
[  118.239301]
[  118.240752] Memory state around the buggy address:
[  118.245522]  ffff20000a63cd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[  118.252695]  ffff20000a63cd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[  118.259850] >ffff20000a63ce00: 00 00 00 00 04 fa fa fa fa fa fa fa 00 00 00 00
[  118.267000]                                ^
[  118.271222]  ffff20000a63ce80: 00 fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
[  118.278393]  ffff20000a63cf00: 00 00 00 00 00 00 00 00 00 00 00 00 04 fa fa fa
[  118.285542] ==================================================================
[  118.292699] Disabling lock debugging due to kernel taint

It seems that when looping through the OSD EOTF LUT maps, we use the
same max iterator for OETF: 20. This is wrong though, since 20*2 is 40,
which means that we'll stop out of bounds on the EOTF maps.

But, this whole thing is already confusing enough to read through as-is,
so let's just replace all of the hardcoded sizes with
OSD_(OETF/EOTF)_LUT_SIZE / 2.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Carlo Caione <carlo@caione.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: <stable@vger.kernel.org> # v4.10+
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181125012117.31915-1-lyude@redhat.com
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drm/meson: Enable fast_io in meson_dw_hdmi_regmap_config 2018-12-08T11:59:07+00:00 Lyude Paul lyude@redhat.com 2018-11-24T19:12:38+00:00 ea6bb077bff27b94d2d612ace7d015fe8dba560a commit 995b278e4723b26f8ebf0e7c119286d16c712747 upstream. Seeing as we use this registermap in the context of our IRQ handlers, we need to be using spinlocks for reading/writing registers so that we can still read them from IRQ handlers without having to grab any mutexes and accidentally sleep. We don't currently do this, as pointed out by lockdep: [ 18.403770] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908 [ 18.406744] in_atomic(): 1, irqs_disabled(): 128, pid: 68, name: kworker/u17:0 [ 18.413864] INFO: lockdep is turned off. [ 18.417675] irq event stamp: 12 [ 18.420778] hardirqs last enabled at (11): [<ffff000008a4f57c>] _raw_spin_unlock_irq+0x2c/0x60 [ 18.429510] hardirqs last disabled at (12): [<ffff000008a48914>] __schedule+0xc4/0xa60 [ 18.437345] softirqs last enabled at (0): [<ffff0000080b55e0>] copy_process.isra.4.part.5+0x4d8/0x1c50 [ 18.446684] softirqs last disabled at (0): [<0000000000000000>] (null) [ 18.453979] CPU: 0 PID: 68 Comm: kworker/u17:0 Tainted: G W O 4.20.0-rc3Lyude-Test+ #9 [ 18.469839] Hardware name: amlogic khadas-vim2/khadas-vim2, BIOS 2018.07-rc2-armbian 09/11/2018 [ 18.480037] Workqueue: hci0 hci_power_on [bluetooth] [ 18.487138] Call trace: [ 18.494192] dump_backtrace+0x0/0x1b8 [ 18.501280] show_stack+0x14/0x20 [ 18.508361] dump_stack+0xbc/0xf4 [ 18.515427] ___might_sleep+0x140/0x1d8 [ 18.522515] __might_sleep+0x50/0x88 [ 18.529582] __mutex_lock+0x60/0x870 [ 18.536621] mutex_lock_nested+0x1c/0x28 [ 18.543660] regmap_lock_mutex+0x10/0x18 [ 18.550696] regmap_read+0x38/0x70 [ 18.557727] dw_hdmi_hardirq+0x58/0x138 [dw_hdmi] [ 18.564804] __handle_irq_event_percpu+0xac/0x410 [ 18.571891] handle_irq_event_percpu+0x34/0x88 [ 18.578982] handle_irq_event+0x48/0x78 [ 18.586051] handle_fasteoi_irq+0xac/0x160 [ 18.593061] generic_handle_irq+0x24/0x38 [ 18.599989] __handle_domain_irq+0x60/0xb8 [ 18.606857] gic_handle_irq+0x50/0xa0 [ 18.613659] el1_irq+0xb4/0x130 [ 18.620394] debug_lockdep_rcu_enabled+0x2c/0x30 [ 18.627111] schedule+0x38/0xa0 [ 18.633781] schedule_timeout+0x3a8/0x510 [ 18.640389] wait_for_common+0x15c/0x180 [ 18.646905] wait_for_completion+0x14/0x20 [ 18.653319] mmc_wait_for_req_done+0x28/0x168 [ 18.659693] mmc_wait_for_req+0xa8/0xe8 [ 18.665978] mmc_wait_for_cmd+0x64/0x98 [ 18.672180] mmc_io_rw_direct_host+0x94/0x130 [ 18.678385] mmc_io_rw_direct+0x10/0x18 [ 18.684516] sdio_enable_func+0xe8/0x1d0 [ 18.690627] btsdio_open+0x24/0xc0 [btsdio] [ 18.696821] hci_dev_do_open+0x64/0x598 [bluetooth] [ 18.703025] hci_power_on+0x50/0x270 [bluetooth] [ 18.709163] process_one_work+0x2a0/0x6e0 [ 18.715252] worker_thread+0x40/0x448 [ 18.721310] kthread+0x12c/0x130 [ 18.727326] ret_from_fork+0x10/0x1c [ 18.735555] ------------[ cut here ]------------ [ 18.741430] do not call blocking ops when !TASK_RUNNING; state=2 set at [<000000006265ec59>] wait_for_common+0x140/0x180 [ 18.752417] WARNING: CPU: 0 PID: 68 at kernel/sched/core.c:6096 __might_sleep+0x7c/0x88 [ 18.760553] Modules linked in: dm_mirror dm_region_hash dm_log dm_mod btsdio bluetooth snd_soc_hdmi_codec dw_hdmi_i2s_audio ecdh_generic brcmfmac brcmutil cfg80211 rfkill ir_nec_decoder meson_dw_hdmi(O) dw_hdmi rc_geekbox meson_rng meson_ir ao_cec rng_core rc_core cec leds_pwm efivars nfsd ip_tables x_tables crc32_generic f2fs uas meson_gxbb_wdt pwm_meson efivarfs ipv6 [ 18.799469] CPU: 0 PID: 68 Comm: kworker/u17:0 Tainted: G W O 4.20.0-rc3Lyude-Test+ #9 [ 18.808858] Hardware name: amlogic khadas-vim2/khadas-vim2, BIOS 2018.07-rc2-armbian 09/11/2018 [ 18.818045] Workqueue: hci0 hci_power_on [bluetooth] [ 18.824088] pstate: 80000085 (Nzcv daIf -PAN -UAO) [ 18.829891] pc : __might_sleep+0x7c/0x88 [ 18.835722] lr : __might_sleep+0x7c/0x88 [ 18.841256] sp : ffff000008003cb0 [ 18.846751] x29: ffff000008003cb0 x28: 0000000000000000 [ 18.852269] x27: ffff00000938e000 x26: ffff800010283000 [ 18.857726] x25: ffff800010353280 x24: ffff00000868ef50 [ 18.863166] x23: 0000000000000000 x22: 0000000000000000 [ 18.868551] x21: 0000000000000000 x20: 000000000000038c [ 18.873850] x19: ffff000008cd08c0 x18: 0000000000000010 [ 18.879081] x17: ffff000008a68cb0 x16: 0000000000000000 [ 18.884197] x15: 0000000000aaaaaa x14: 0e200e200e200e20 [ 18.889239] x13: 0000000000000001 x12: 00000000ffffffff [ 18.894261] x11: ffff000008adfa48 x10: 0000000000000001 [ 18.899517] x9 : ffff0000092a0158 x8 : 0000000000000000 [ 18.904674] x7 : ffff00000812136c x6 : 0000000000000000 [ 18.909895] x5 : 0000000000000000 x4 : 0000000000000001 [ 18.915080] x3 : 0000000000000007 x2 : 0000000000000007 [ 18.920269] x1 : 99ab8e9ebb6c8500 x0 : 0000000000000000 [ 18.925443] Call trace: [ 18.929904] __might_sleep+0x7c/0x88 [ 18.934311] __mutex_lock+0x60/0x870 [ 18.938687] mutex_lock_nested+0x1c/0x28 [ 18.943076] regmap_lock_mutex+0x10/0x18 [ 18.947453] regmap_read+0x38/0x70 [ 18.951842] dw_hdmi_hardirq+0x58/0x138 [dw_hdmi] [ 18.956269] __handle_irq_event_percpu+0xac/0x410 [ 18.960712] handle_irq_event_percpu+0x34/0x88 [ 18.965176] handle_irq_event+0x48/0x78 [ 18.969612] handle_fasteoi_irq+0xac/0x160 [ 18.974058] generic_handle_irq+0x24/0x38 [ 18.978501] __handle_domain_irq+0x60/0xb8 [ 18.982938] gic_handle_irq+0x50/0xa0 [ 18.987351] el1_irq+0xb4/0x130 [ 18.991734] debug_lockdep_rcu_enabled+0x2c/0x30 [ 18.996180] schedule+0x38/0xa0 [ 19.000609] schedule_timeout+0x3a8/0x510 [ 19.005064] wait_for_common+0x15c/0x180 [ 19.009513] wait_for_completion+0x14/0x20 [ 19.013951] mmc_wait_for_req_done+0x28/0x168 [ 19.018402] mmc_wait_for_req+0xa8/0xe8 [ 19.022809] mmc_wait_for_cmd+0x64/0x98 [ 19.027177] mmc_io_rw_direct_host+0x94/0x130 [ 19.031563] mmc_io_rw_direct+0x10/0x18 [ 19.035922] sdio_enable_func+0xe8/0x1d0 [ 19.040294] btsdio_open+0x24/0xc0 [btsdio] [ 19.044742] hci_dev_do_open+0x64/0x598 [bluetooth] [ 19.049228] hci_power_on+0x50/0x270 [bluetooth] [ 19.053687] process_one_work+0x2a0/0x6e0 [ 19.058143] worker_thread+0x40/0x448 [ 19.062608] kthread+0x12c/0x130 [ 19.067064] ret_from_fork+0x10/0x1c [ 19.071513] irq event stamp: 12 [ 19.075937] hardirqs last enabled at (11): [<ffff000008a4f57c>] _raw_spin_unlock_irq+0x2c/0x60 [ 19.083560] hardirqs last disabled at (12): [<ffff000008a48914>] __schedule+0xc4/0xa60 [ 19.091401] softirqs last enabled at (0): [<ffff0000080b55e0>] copy_process.isra.4.part.5+0x4d8/0x1c50 [ 19.100801] softirqs last disabled at (0): [<0000000000000000>] (null) [ 19.108135] ---[ end trace 38c4920787b88c75 ]--- So, fix this by enabling the fast_io option in our regmap config so that regmap uses spinlocks for locking instead of mutexes. Signed-off-by: Lyude Paul <lyude@redhat.com> Fixes: 3f68be7d8e96 ("drm/meson: Add support for HDMI encoder and DW-HDMI bridge + PHY") Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: dri-devel@lists.freedesktop.org Cc: linux-amlogic@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Cc: <stable@vger.kernel.org> # v4.12+ Acked-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://patchwork.freedesktop.org/patch/msgid/20181124191238.28276-1-lyude@redhat.com Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 995b278e4723b26f8ebf0e7c119286d16c712747 upstream.

Seeing as we use this registermap in the context of our IRQ handlers, we
need to be using spinlocks for reading/writing registers so that we can
still read them from IRQ handlers without having to grab any mutexes and
accidentally sleep. We don't currently do this, as pointed out by
lockdep:

[   18.403770] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:908
[   18.406744] in_atomic(): 1, irqs_disabled(): 128, pid: 68, name: kworker/u17:0
[   18.413864] INFO: lockdep is turned off.
[   18.417675] irq event stamp: 12
[   18.420778] hardirqs last  enabled at (11): [<ffff000008a4f57c>] _raw_spin_unlock_irq+0x2c/0x60
[   18.429510] hardirqs last disabled at (12): [<ffff000008a48914>] __schedule+0xc4/0xa60
[   18.437345] softirqs last  enabled at (0): [<ffff0000080b55e0>] copy_process.isra.4.part.5+0x4d8/0x1c50
[   18.446684] softirqs last disabled at (0): [<0000000000000000>]           (null)
[   18.453979] CPU: 0 PID: 68 Comm: kworker/u17:0 Tainted: G        W  O      4.20.0-rc3Lyude-Test+ #9
[   18.469839] Hardware name: amlogic khadas-vim2/khadas-vim2, BIOS 2018.07-rc2-armbian 09/11/2018
[   18.480037] Workqueue: hci0 hci_power_on [bluetooth]
[   18.487138] Call trace:
[   18.494192]  dump_backtrace+0x0/0x1b8
[   18.501280]  show_stack+0x14/0x20
[   18.508361]  dump_stack+0xbc/0xf4
[   18.515427]  ___might_sleep+0x140/0x1d8
[   18.522515]  __might_sleep+0x50/0x88
[   18.529582]  __mutex_lock+0x60/0x870
[   18.536621]  mutex_lock_nested+0x1c/0x28
[   18.543660]  regmap_lock_mutex+0x10/0x18
[   18.550696]  regmap_read+0x38/0x70
[   18.557727]  dw_hdmi_hardirq+0x58/0x138 [dw_hdmi]
[   18.564804]  __handle_irq_event_percpu+0xac/0x410
[   18.571891]  handle_irq_event_percpu+0x34/0x88
[   18.578982]  handle_irq_event+0x48/0x78
[   18.586051]  handle_fasteoi_irq+0xac/0x160
[   18.593061]  generic_handle_irq+0x24/0x38
[   18.599989]  __handle_domain_irq+0x60/0xb8
[   18.606857]  gic_handle_irq+0x50/0xa0
[   18.613659]  el1_irq+0xb4/0x130
[   18.620394]  debug_lockdep_rcu_enabled+0x2c/0x30
[   18.627111]  schedule+0x38/0xa0
[   18.633781]  schedule_timeout+0x3a8/0x510
[   18.640389]  wait_for_common+0x15c/0x180
[   18.646905]  wait_for_completion+0x14/0x20
[   18.653319]  mmc_wait_for_req_done+0x28/0x168
[   18.659693]  mmc_wait_for_req+0xa8/0xe8
[   18.665978]  mmc_wait_for_cmd+0x64/0x98
[   18.672180]  mmc_io_rw_direct_host+0x94/0x130
[   18.678385]  mmc_io_rw_direct+0x10/0x18
[   18.684516]  sdio_enable_func+0xe8/0x1d0
[   18.690627]  btsdio_open+0x24/0xc0 [btsdio]
[   18.696821]  hci_dev_do_open+0x64/0x598 [bluetooth]
[   18.703025]  hci_power_on+0x50/0x270 [bluetooth]
[   18.709163]  process_one_work+0x2a0/0x6e0
[   18.715252]  worker_thread+0x40/0x448
[   18.721310]  kthread+0x12c/0x130
[   18.727326]  ret_from_fork+0x10/0x1c
[   18.735555] ------------[ cut here ]------------
[   18.741430] do not call blocking ops when !TASK_RUNNING; state=2 set at [<000000006265ec59>] wait_for_common+0x140/0x180
[   18.752417] WARNING: CPU: 0 PID: 68 at kernel/sched/core.c:6096 __might_sleep+0x7c/0x88
[   18.760553] Modules linked in: dm_mirror dm_region_hash dm_log dm_mod
btsdio bluetooth snd_soc_hdmi_codec dw_hdmi_i2s_audio ecdh_generic
brcmfmac brcmutil cfg80211 rfkill ir_nec_decoder meson_dw_hdmi(O)
dw_hdmi rc_geekbox meson_rng meson_ir ao_cec rng_core rc_core cec
leds_pwm efivars nfsd ip_tables x_tables crc32_generic f2fs uas
meson_gxbb_wdt pwm_meson efivarfs ipv6
[   18.799469] CPU: 0 PID: 68 Comm: kworker/u17:0 Tainted: G        W  O      4.20.0-rc3Lyude-Test+ #9
[   18.808858] Hardware name: amlogic khadas-vim2/khadas-vim2, BIOS 2018.07-rc2-armbian 09/11/2018
[   18.818045] Workqueue: hci0 hci_power_on [bluetooth]
[   18.824088] pstate: 80000085 (Nzcv daIf -PAN -UAO)
[   18.829891] pc : __might_sleep+0x7c/0x88
[   18.835722] lr : __might_sleep+0x7c/0x88
[   18.841256] sp : ffff000008003cb0
[   18.846751] x29: ffff000008003cb0 x28: 0000000000000000
[   18.852269] x27: ffff00000938e000 x26: ffff800010283000
[   18.857726] x25: ffff800010353280 x24: ffff00000868ef50
[   18.863166] x23: 0000000000000000 x22: 0000000000000000
[   18.868551] x21: 0000000000000000 x20: 000000000000038c
[   18.873850] x19: ffff000008cd08c0 x18: 0000000000000010
[   18.879081] x17: ffff000008a68cb0 x16: 0000000000000000
[   18.884197] x15: 0000000000aaaaaa x14: 0e200e200e200e20
[   18.889239] x13: 0000000000000001 x12: 00000000ffffffff
[   18.894261] x11: ffff000008adfa48 x10: 0000000000000001
[   18.899517] x9 : ffff0000092a0158 x8 : 0000000000000000
[   18.904674] x7 : ffff00000812136c x6 : 0000000000000000
[   18.909895] x5 : 0000000000000000 x4 : 0000000000000001
[   18.915080] x3 : 0000000000000007 x2 : 0000000000000007
[   18.920269] x1 : 99ab8e9ebb6c8500 x0 : 0000000000000000
[   18.925443] Call trace:
[   18.929904]  __might_sleep+0x7c/0x88
[   18.934311]  __mutex_lock+0x60/0x870
[   18.938687]  mutex_lock_nested+0x1c/0x28
[   18.943076]  regmap_lock_mutex+0x10/0x18
[   18.947453]  regmap_read+0x38/0x70
[   18.951842]  dw_hdmi_hardirq+0x58/0x138 [dw_hdmi]
[   18.956269]  __handle_irq_event_percpu+0xac/0x410
[   18.960712]  handle_irq_event_percpu+0x34/0x88
[   18.965176]  handle_irq_event+0x48/0x78
[   18.969612]  handle_fasteoi_irq+0xac/0x160
[   18.974058]  generic_handle_irq+0x24/0x38
[   18.978501]  __handle_domain_irq+0x60/0xb8
[   18.982938]  gic_handle_irq+0x50/0xa0
[   18.987351]  el1_irq+0xb4/0x130
[   18.991734]  debug_lockdep_rcu_enabled+0x2c/0x30
[   18.996180]  schedule+0x38/0xa0
[   19.000609]  schedule_timeout+0x3a8/0x510
[   19.005064]  wait_for_common+0x15c/0x180
[   19.009513]  wait_for_completion+0x14/0x20
[   19.013951]  mmc_wait_for_req_done+0x28/0x168
[   19.018402]  mmc_wait_for_req+0xa8/0xe8
[   19.022809]  mmc_wait_for_cmd+0x64/0x98
[   19.027177]  mmc_io_rw_direct_host+0x94/0x130
[   19.031563]  mmc_io_rw_direct+0x10/0x18
[   19.035922]  sdio_enable_func+0xe8/0x1d0
[   19.040294]  btsdio_open+0x24/0xc0 [btsdio]
[   19.044742]  hci_dev_do_open+0x64/0x598 [bluetooth]
[   19.049228]  hci_power_on+0x50/0x270 [bluetooth]
[   19.053687]  process_one_work+0x2a0/0x6e0
[   19.058143]  worker_thread+0x40/0x448
[   19.062608]  kthread+0x12c/0x130
[   19.067064]  ret_from_fork+0x10/0x1c
[   19.071513] irq event stamp: 12
[   19.075937] hardirqs last  enabled at (11): [<ffff000008a4f57c>] _raw_spin_unlock_irq+0x2c/0x60
[   19.083560] hardirqs last disabled at (12): [<ffff000008a48914>] __schedule+0xc4/0xa60
[   19.091401] softirqs last  enabled at (0): [<ffff0000080b55e0>] copy_process.isra.4.part.5+0x4d8/0x1c50
[   19.100801] softirqs last disabled at (0): [<0000000000000000>]           (null)
[   19.108135] ---[ end trace 38c4920787b88c75 ]---

So, fix this by enabling the fast_io option in our regmap config so that
regmap uses spinlocks for locking instead of mutexes.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: 3f68be7d8e96 ("drm/meson: Add support for HDMI encoder and DW-HDMI bridge + PHY")
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Carlo Caione <carlo@caione.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: <stable@vger.kernel.org> # v4.12+
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181124191238.28276-1-lyude@redhat.com
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>