- 27 Jul, 2017 16 commits
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Chris Wilson authored
If all goes well, resetting one engine should not affect the operation of any others. So to test this, we setup a continuous stream of requests onto to each of the "innocent" engines whilst constantly resetting our target engine. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Cc: Michel Thierry <michel.thierry@intel.com> Reviewed-by:
Michel Thierry <michel.thierry@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170721123238.16428-16-chris@chris-wilson.co.ukSigned-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch>
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Chris Wilson authored
Triggering a GPU reset for one engine affects another, notably corrupting the context status buffer (CSB) effectively losing track of inflight requests. Adding a few printks: diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index ad41836fa5e5..a969456bc0fa 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1953,6 +1953,7 @@ int i915_reset_engine(struct intel_engine_cs *engine) goto out; } + pr_err("Resetting %s\n", engine->name); ret = intel_gpu_reset(engine->i915, intel_engine_flag(engine)); if (ret) { /* If we fail here, we expect to fallback to a global reset */ diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 716e5c9ea222..a72bc35d0870 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -355,6 +355,7 @@ static void execlists_submit_ports(struct intel_engine_cs *engine) execlists_context_status_change(rq, INTEL_CONTEXT_SCHEDULE_IN); port_set(&port[n], port_pack(rq, count)); desc = execlists_update_context(rq); + pr_err("%s: in (rq=%x) ctx=%d\n", engine->name, rq->global_seqno, upper_32_bits(desc)); GEM_DEBUG_EXEC(port[n].context_id = upper_32_bits(desc)); } else { GEM_BUG_ON(!n); @@ -594,9 +595,23 @@ static void intel_lrc_irq_handler(unsigned long data) if (!(status & GEN8_CTX_STATUS_COMPLETED_MASK)) continue; + pr_err("%s: out CSB (%x head=%d, tail=%d), ctx=%d, rq=%d\n", + engine->name, + readl(csb_mmio), + head, tail, + readl(buf+2*head+1), + port->context_id); + /* Check the context/desc id for this event matches */ - GEM_DEBUG_BUG_ON(readl(buf + 2 * head + 1) != - port->context_id); + if (readl(buf + 2 * head + 1) != port->context_id) { + pr_err("%s: BUG CSB (%x head=%d, tail=%d), ctx=%d, rq=%d\n", + engine->name, + readl(csb_mmio), + head, tail, + readl(buf+2*head+1), + port->context_id); + BUG(); + } rq = port_unpack(port, &count); GEM_BUG_ON(count == 0); Results in: [ 6423.006602] Resetting rcs0 [ 6423.009080] rcs0: in (rq=fffffe70) ctx=1 [ 6423.009216] rcs0: in (rq=fffffe6f) ctx=3 [ 6423.009542] rcs0: out CSB (2 head=1, tail=2), ctx=3, rq=3 [ 6423.009619] Resetting bcs0 [ 6423.009980] rcs0: BUG CSB (0 head=1, tail=2), ctx=0, rq=3 Note that this bug may be affect all machines and not just Broxton, Broxton is just the first machine on which I have confirmed this bug. Fixes: 142bc7d9 ("drm/i915: Modify error handler for per engine hang recovery") Signed-off-by: -
Chris Wilson authored
Although a banned context will be told to -EIO off if they try to submit more requests, we have a discrepancy between whole device resets and per-engine resets where we report the GPU reset but not the engine resets. This leaves a bit of mystery as to why the context was banned, and also reduces awareness overall of when a GPU (engine) reset occurs with its possible side-effects. Signed-off-by:
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Chris Wilson authored
Since we make call i915_gem_context_mark_guilty() concurrently when resetting different engines in parallel, we need to make sure that our updates are safe for the unlocked access. Signed-off-by:
Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170721123238.16428-12-chris@chris-wilson.co.ukSigned-off-by:
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Chris Wilson authored
When the GPU is reset, we want to discard all pending notifications as either we have manually completed them, or they are no longer applicable. Make sure we do reset the engine->irq_posted prior to re-enabling the engine (e.g. the interrupt tasklets) in i915_gem_reset_finish_engine(). Signed-off-by:
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Chris Wilson authored
We should only ever do nop_submit_request when the machine is wedged, so assert it is so. Signed-off-by:
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Chris Wilson authored
After setting the WEDGED bit, make sure that we do wake up waiters as they may not be waiting for a request completion yet, just for its execution. Signed-off-by:
Mika Kuoppala <mika.kuoppala@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170721123238.16428-9-chris@chris-wilson.co.ukSigned-off-by:
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Chris Wilson authored
intel_engine_init_globa_seqno() may be called from an uncontrolled set-wedged path where we have given up waiting for broken hw and declare it defunct. Along that path, any sanity checks that the hw is idle before we adjust its state will expectedly fail, so we simply cannot. Instead of asserting inside init_global_seqno, we move them to the normal caller reset_all_global_seqno() as it handles runtime seqno wraparound. Signed-off-by:
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Chris Wilson authored
When we wedge the device, we clear out the in-flight requests and advance the breadcrumb to indicate they are complete. However, the breadcrumb advance includes an assert that the engine is idle, so that advancement needs to be the last step to ensure we pass our own sanity checks. Signed-off-by:
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Chris Wilson authored
Including a check against the execlist queue before calling the engine idle and passing hangcheck. Signed-off-by:
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Chris Wilson authored
Before we declare an engine as idle, check if there are any pending execlist context-switches and if the ring itself reports as idle. Otherwise, we may be left in a situation where we miss a crucial execlist event (or something more sinister) yet the requests complete. Since the seqno write happens, we believe the engine to be truly idle. Signed-off-by:
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Chris Wilson authored
When doing a GPU reset, the CSB register will be trashed and we will lose any context-switch notifications that happened since the tasklet was disabled. If we find that all requests on this engine were completed, we want to make sure that the ELSP tracker is similarly empty so that we do not feed back in the completed requests upon recovering from the reset. Signed-off-by:
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Chris Wilson authored
We rely on disabling the execlists (by stopping the tasklet) to prevent new requests from submitting to the engine ELSP before we are ready. However, we re-enable the engine before we call init_hw which gives userspace the opportunity to subit a new request which is then overwritten by init_hw -- but not before the HW may have started executing. The subsequent out-of-order CSB is detected by our sanity checks in intel_lrc_irq_handler(). Fixes: a1ef70e1 ("drm/i915: Add support for per engine reset recovery") Signed-off-by:
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Chris Wilson authored
We try to fixup the context image after the reset to ensure that there are no more pending writes from the hw that may conflict and to fixup any that were in flight. Fixes: a1ef70e1 ("drm/i915: Add support for per engine reset recovery") Signed-off-by:
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Chris Wilson authored
As part of the knowing whether there is outstanding data in the CSB, also check whether there is an outstanding IRQ notification. Signed-off-by:
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Daniel Vetter authored
Resync with upstream to avoid git getting too badly confused. Also, we have a conflict with the drm_vblank_cleanup removal, which cannot be resolved by simply taking our side. Bake that in properly. Signed-off-by:
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- 26 Jul, 2017 24 commits
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Stephen Rothwell authored
Hi all, After merging the drm-misc tree, today's linux-next build (x86_64 allmodconfig) failed like this: drivers/staging/vboxvideo/vbox_drv.c:235:2: error: unknown field 'set_busid' specified in initializer .set_busid = drm_pci_set_busid, ^ drivers/staging/vboxvideo/vbox_drv.c:235:15: error: 'drm_pci_set_busid' undeclared here (not in a function) .set_busid = drm_pci_set_busid, ^ drivers/staging/vboxvideo/vbox_drv.c: In function 'vbox_init': drivers/staging/vboxvideo/vbox_drv.c:273:9: error: implicit declaration of function 'drm_pci_init' [-Werror=implicit-function-declaration] return drm_pci_init(&driver, &vbox_pci_driver); ^ drivers/staging/vboxvideo/vbox_drv.c: In function 'vbox_exit': drivers/staging/vboxvideo/vbox_drv.c:278:2: error: implicit declaration of function 'drm_pci_exit' [-Werror=implicit-function-declaration] drm_pci_exit(&driver, &vbox_pci_driver); ^ Caused by commits 5c484cee ("drm: Remove drm_driver->set_busid hook") 10631d72 ("drm/pci: Deprecate drm_pci_init/exit completely") interacting with commit dd55d44f ("staging: vboxvideo: Add vboxvideo to drivers/staging") from the staging.current tree. I have applied the following merge fix patch - please check that it is correct. From: Stephen Rothwell <sfr@canb.auug.org.au> Date: Wed, 19 Jul 2017 11:41:01 +1000 Subject: [PATCH] drm: fixes for staging due to API changes in the drm core Signed-off-by:Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
Dave Airlie <airlied@redhat.com>
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Dave Airlie authored
Linux 4.13-rc2 This is required for drm-misc fixing.
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git://anongit.freedesktop.org/git/drm-miscDave Airlie authored
drm-misc-next-2017-07-18: Core Changes: - A couple fixes to only opening crc when needed (Maarten) - Change atomic helper swap_state to be interruptible (Maarten) - fb_helper: Support waiting for an output before setting up (Daniel) - Allow drivers supporting runtime_pm to use helper_commit_tail (Maxime) Driver Changes: - misc: Use %pOF to print device node names (Rob) - Miscellaneous fixes drm-misc-next-2017-07-18: UAPI Changes: - Fail commits which request an event without including a crtc (Andrey) Core Changes: - Add YCBCR 4:2:0 support (Shashank) - s/drm_atomic_replace_property_blob/drm_property_replace_blob/ (Peter) - Add proper base class for private objs instead of using void* (Ville) - Remove pending_read/write_domains from drm_gem_object (Chris) - Add async plane update support (ie: cursor) to atomic helpers (Gustavo) - Add old state to .enable and rename to .atomic_enable (Laurent) - Add drm_atomic_helper_wait_for_flip_done() (Boris) - Remove drm_driver->set_busid hook (Daniel) - Migrate vblank documentation into the source files (Daniel) - Add fb_helper->lock instead of abusing modeset lock (Thierry/Daniel) Driver Changes: - stm: Add STM32 DSI controller driver (Phillipe) - amdgpu: Numerous small/misc fixes - bridge: Add Synopsys Designware MIPI DSI host bridge driver (Phillipe) - tinydrm: Add support for Pervasive Displays RePaper displays (Noralf) - misc: Replace for_each_[obj]_in_state to prep for removal (Maarten) - misc: Use .atomic_disable for atomic drivers (Laurent) - vgem: Pin pages when mapped/exported (Chris) - dw_hdmi: Add support for Rockchip RK3399 (Mark) - atmel-hlcdc: Add 8-bit color look-up table format (Peter) - vc4: Send vblank event when disabling a crtc (Boris) - vc4: Use atomic helpers for fence waits (Eric) - misc: drop drm_vblank_cleanup cargo-cult (Daniel) Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Boris Brezillon <boris.brezillon@free-electrons.com> Cc: Eric Anholt <eric@anholt.net> Cc: Peter Rosin <peda@axentia.se> Cc: Mark Yao <mark.yao@rock-chips.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com> Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Cc: Gustavo Padovan <gustavo.padovan@collabora.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Peter Rosin <peda@axentia.se> Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Philippe CORNU <philippe.cornu@st.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Rob Herring <robh@kernel.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> * tag 'drm-misc-next-2017-07-26' of git://anongit.freedesktop.org/git/drm-misc: (171 commits) drm/hisilicon: fix build error without fbdev emulation drm/atomic: implement drm_atomic_helper_commit_tail for runtime_pm users drm: Improve kerneldoc for drm_modeset_lock drm/hisilicon: Remove custom FB helper deferred setup drm/exynos: Remove custom FB helper deferred setup drm/fb-helper: Support deferred setup dma-fence: Don't BUG_ON when not absolutely needed drm: Convert to using %pOF instead of full_name drm/syncobj: Fix kerneldoc drm/atomic: Allow drm_atomic_helper_swap_state to fail drm/atomic: Add __must_check to drm_atomic_helper_swap_state. drm/vc4: Handle drm_atomic_helper_swap_state failure drm/tilcdc: Handle drm_atomic_helper_swap_state failure drm/tegra: Handle drm_atomic_helper_swap_state failure drm/msm: Handle drm_atomic_helper_swap_state failure drm/mediatek: Handle drm_atomic_helper_swap_state failure drm/i915: Handle drm_atomic_helper_swap_state failure drm/atmel-hlcdc: Handle drm_atomic_helper_swap_state failure drm/nouveau: Handle drm_atomic_helper_swap_state failure drm/atomic: Change drm_atomic_helper_swap_state to return an error. ...
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Arnd Bergmann authored
We cannot reference priv->fbdev outside of the #ifdef: drivers/net/virtio_net.c:1881:12: error: 'virtnet_restore_up' defined but not used [-Werror=unused-function] static int virtnet_restore_up(struct virtio_device *vdev) drivers/net/virtio_net.c:1859:13: error: 'virtnet_freeze_down' defined but not used [-Werror=unused-function] static void virtnet_freeze_down(struct virtio_device *vdev) As the #ifdef is a bit annoying here, this removes it entirely and uses an IS_ENABLED() check in it place where needed. Fixes: b4dd9f1ffaba ("drm/hisilicon: Remove custom FB helper deferred setup") Signed-off-by:Arnd Bergmann <arnd@arndb.de> [danvet: One step further, also remove the IS_ENABLED checks, core no-ops out the fb helper functions that the cma helpers use. Discussed with Arnd on dri-devel.] Signed-off-by:
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Maxime Ripard authored
The current drm_atomic_helper_commit_tail helper works only if the CRTC is accessible, and documents an alternative implementation that is supposed to be used if that happens. That implementation is then duplicated by some drivers. Instead of documenting it, let's implement an helper that all the relevant users can use directly. Signed-off-by:
Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by:
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Liviu Dudau authored
Explain better when the drm_modeset_acquire_ctx parameter can be skipped for drm_modeset_lock() call. Signed-off-by:
Liviu Dudau <Liviu.Dudau@arm.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
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Thierry Reding authored
The FB helper core now supports deferred setup, so the driver's custom implementation can be removed. v2: Dont' resurrect drm_vblank_cleanup. Cc: Xinliang Liu <z.liuxinliang@hisilicon.com> Cc: Rongrong Zou <zourongrong@gmail.com> Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com> Cc: Chen Feng <puck.chen@hisilicon.com> Signed-off-by: Thierry Reding <treding@nvidia.com> (v1) Reviewed-by:
Sean Paul <seanpaul@chromium.org> Signed-off-by:
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Thierry Reding authored
The FB helper core now supports deferred setup, so the driver's custom implementation can be removed. v2: Drop NULL check, drm_fb_helper_hotplug_event handles that already. Cc: Inki Dae <inki.dae@samsung.com> Cc: Joonyoung Shim <jy0922.shim@samsung.com> Cc: Seung-Woo Kim <sw0312.kim@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Thierry Reding <treding@nvidia.com> (v1) Reviewed-by:
Inki Dae <inki.dae@samsung.com> Tested-by:
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Daniel Vetter authored
FB helper code falls back to a 1024x768 mode if no outputs are connected or don't report back any modes upon initialization. This can be annoying because outputs that are added to FB helper later on can't be used with FB helper if they don't support a matching mode. The fallback is in place because VGA connectors can happen to report an unknown connection status even when they are in fact connected. Some drivers have custom solutions in place to defer FB helper setup until at least one output is connected. But the logic behind these solutions is always the same and there is nothing driver-specific about it, so a better alterative is to fix the FB helper core and add support for all drivers automatically. This patch adds support for deferred FB helper setup. It checks all the connectors for their connection status, and if all of them report to be disconnected marks the FB helper as needing deferred setup. Whet setup is deferred, the FB helper core will automatically retry setup after a hotplug event, and it will keep trying until it succeeds. v2: Rebase onto my entirely reworked fbdev helper locking. One big difference is that this version again drops&reacquires the fbdev lock (which is now fb_helper->lock, but before this patch series it was mode_config->mutex), because register_framebuffer must be able to recurse back into fbdev helper code for the initial screen setup. v3: __drm_fb_helper_initial_config must hold fb_helper->lock upon return, I've fumbled that in the deferred setup case (Liviu). v4: I was blind, redo this all. __drm_fb_helper_initial_config shouldn't need to reacquire fb_helper->lock, that just confuses callers. I myself got confused by kernel_fb_helper_lock and somehow thought it's the same as fb_helper->lock. Tsk. Also simplify the logic a bit (we don't need two functions to probe connectors), we can stick much closer to the existing code. And update some comments I've spotted that are outdated. v5: Don't pass -EAGAIN to drivers, it's just an internal error code (Liviu). v6: Add _and_unlock suffix to clarify locking (Maarten) Cc: Liviu Dudau <liviu@dudau.co.uk> Cc: John Stultz <john.stultz@linaro.org> Cc: Thierry Reding <treding@nvidia.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Tested-by:
John Stultz <john.stultz@linaro.org> Signed-off-by: Thierry Reding <treding@nvidia.com> (v1) Reviewed-by:
Maarten Lankhorst <maarten.lankhorst@intel.com> Reviewed-by:
Liviu Dudau <liviu@dudau.co.uk> Signed-off-by:
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Daniel Vetter authored
It makes debugging a massive pain. Signed-off-by:
Daniel Vetter <daniel.vetter@intel.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: linux-media@vger.kernel.org Cc: linaro-mm-sig@lists.linaro.org Reviewed-by:
Lucas Stach <l.stach@pengutronix.de> Acked-by:
Sumit Semwal <sumit.semwal@linaro.org> Acked-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170720125107.26693-1-daniel.vetter@ffwll.chSigned-off-by:
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Rob Herring authored
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by:
Rob Herring <robh@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Sean Paul <seanpaul@chromium.org> Cc: Inki Dae <inki.dae@samsung.com> Cc: Joonyoung Shim <jy0922.shim@samsung.com> Cc: Seung-Woo Kim <sw0312.kim@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Javier Martinez Canillas <javier@osg.samsung.com> Cc: Xinliang Liu <z.liuxinliang@hisilicon.com> Cc: Rongrong Zou <zourongrong@gmail.com> Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com> Cc: Chen Feng <puck.chen@hisilicon.com> Cc: CK Hu <ck.hu@mediatek.com> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Mark Yao <mark.yao@rock-chips.com> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Chen-Yu Tsai <wens@csie.org> Cc: Jyri Sarha <jsarha@ti.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: dri-devel@lists.freedesktop.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-mediatek@lists.infradead.org Cc: linux-amlogic@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Partially-Reviewed-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by:
Philipp Zabel <p.zabel@pengutronix.de> Acked-by:
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Daniel Vetter authored
I need this to be able to apply the deferred fbdev setup patches, I need the relevant prep work that landed through the drm-intel tree. Also squash in conflict fixup from Laurent Pinchart. Signed-off-by: -
Daniel Vetter authored
make htmldocs helps with catching these. Cc: Dave Airlie <airlied@gmail.com> Acked-by:
Dave Airlie <airlied@gmail.com> Signed-off-by:
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Maarten Lankhorst authored
Signed-off-by:
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Maarten Lankhorst authored
Now that all drivers check the return value, convert swap_state to __must_check. This is done separately to force build warnings if we missed a driver. Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. VC4 has its own nonblocking modeset tracking through the vc4->async_modeset semaphore, so it doesn't need to stall in swap_state. Pass stall = false and BUG_ON when it returns an error. This should never happen for !stall. Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. MSM has its own busy tracking, which means the swap_state call can be done with stall = false, in which case it should never return an error. Handle failure with BUG_ON for this reason. Signed-off-by:
Archit Taneja <architt@codeaurora.org> Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. Atmel tracks pending commits through dc->commit.pending, so it can ignore the changes by setting stall = false. We never return failure in this case, so make failure a BUG_ON. Signed-off-by:
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Maarten Lankhorst authored
drm_atomic_helper_swap_state() will be changed to interruptible waiting in the next few commits, so all drivers have to be changed to handling failure. Signed-off-by:
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Maarten Lankhorst authored
We want to change swap_state to wait indefinitely, but to do this swap_state should wait interruptibly. This requires propagating the error to each driver. Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Cc: intel-gfx@lists.freedesktop.org Signed-off-by:
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