- 22 Apr, 2016 13 commits
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Lyude authored
This is part of a patch series to migrate all of the workarounds for commonly seen behavior from bad sinks in intel_dp_dpcd_read_wake() to drm's DP helper. We cannot rely on sinks NACKing or deferring when they can't receive transactions, nor can we rely on any other sort of consistent error to know when we should stop retrying. As such, we need to just retry unconditionally on errors. We also make sure here to return the error we encountered during the first transaction, since it's possible that retrying the transaction might return a different error then we had originally. This, along with the previous patch, work around a weird bug with the ThinkPad T560's and it's dock. When resuming the laptop, it appears that there's a short period of time where we're unable to complete any aux transactions, as they all immediately timeout. The only machine I'm able to reproduce this on is the T560 as other production Skylake models seem to be fine. The period during which AUX transactions fail appears to be around 22ms long. AFAIK, the dock for the T560 never actually turns off, the only difference is that it's in SST mode at the start of the resume process, so it's unclear as to why it would need so much time to come back up. There's been a discussion on this issue going on for a while on the intel-gfx mailing list about this that has, in addition to including developers from Intel, also had the correspondence of one of the hardware engineers for Intel: http://www.spinics.net/lists/intel-gfx/msg88831.html http://www.spinics.net/lists/intel-gfx/msg88410.html We've already looked into a couple of possible explanations for the problem: - Calling intel_dp_mst_resume() before right fix. intel_runtime_pm_enable_interrupts(). This was the first fix I tried, and while it worked it definitely wasn't the right fix. This worked because DP aux transactions don't actually require interrupts to work: static uint32_t intel_dp_aux_wait_done(struct intel_dp *intel_dp, bool has_aux_irq) { struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); struct drm_device *dev = intel_dig_port->base.base.dev; struct drm_i915_private *dev_priv = dev->dev_private; i915_reg_t ch_ctl = intel_dp->aux_ch_ctl_reg; uint32_t status; bool done; #define C (((status = I915_READ_NOTRACE(ch_ctl)) & DP_AUX_CH_CTL_SEND_BUSY) == 0) if (has_aux_irq) done = wait_event_timeout(dev_priv->gmbus_wait_queue, C, msecs_to_jiffies_timeout(10)); else done = wait_for_atomic(C, 10) == 0; if (!done) DRM_ERROR("dp aux hw did not signal timeout (has irq: %i)!\n", has_aux_irq); #undef C return status; } When there's no interrupts enabled, we end up timing out on the wait_event_timeout() call, which causes us to check the DP status register once to see if the transaction was successful or not. Since this adds a 10ms delay to each aux transaction, it ends up adding a long enough delay to the resume process for aux transactions to become functional again. This gave us the illusion that enabling interrupts had something to do with making things work again, and put me on the wrong track for a while. - Interrupts occurring when we try to perform the aux transactions required to put the dock back into MST mode. This isn't the problem, as the only interrupts I've observed that come during this timeout period are from the snd_hda_intel driver, and disabling that driver doesn't appear to change the behavior at all. - Skylake's PSR block causing issues by performing aux transactions while we try to bring the dock out of MST mode. Disabling PSR through i915's command line options doesn't seem to change the behavior either, nor does preventing the DMC firmware from being loaded. Since this investigation went on for about 2 weeks, we decided it would be better for the time being to just workaround this issue by making sure AUX transactions wait a short period of time before retrying. Signed-off-by:
Lyude <cpaul@redhat.com> Tested-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1460559513-32280-3-git-send-email-cpaul@redhat.com
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Lyude authored
This is part of a patch series to migrate all of the workarounds for commonly seen behavior from bad sinks in intel_dp_dpcd_read_wake() to drm's DP helper. Some sinks need some time during the process of resuming the system from sleep before they're ready to handle transactions. While it would be nice if they responded with NACKs in these scenarios, this isn't always the case as a few sinks will just timeout on all of the transactions they receive until they're ready. Signed-off-by:
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Dave Airlie authored
Since ref counting is in the object now we can just call the normal interfaces. Reviewed-by:
Dave Airlie <airlied@redhat.com>
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Dave Airlie authored
This reduces the fb_lock to just protecting the num_fb/fb_list. "Previously fb refcounting, and especially the weak reference (kref_get_unless_zero) used in fb lookups have been protected by fb_lock. But with the refactoring to share refcounting in the drm_mode_object base class that switched to being protected by idr_mutex, which means fb_lock critical sections can be reduced." Reviewed-by:
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Dave Airlie authored
When we lookup an ref counted object we now take a proper reference using kref_get_unless_zero. Framebuffer lookup no longer needs do this itself. Convert rmfb to using framebuffer lookup and deal with the fact it now gets an extra reference that we have to cleanup. This should mean we can avoid holding fb_lock across rmfb. (if I'm wrong let me know). We also now only hold the fbs_lock around the list manipulation. "Previously fb refcounting, and especially the weak reference (kref_get_unless_zero) used in fb lookups have been protected by fb_lock. But with the refactoring to share refcounting in the drm_mode_object base class that switched to being protected by idr_mutex, which means fb_lock critical sections can be reduced." Reviewed-by:
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Dave Airlie authored
No need to hold the lock while assigning the variable. Daniel wrote: "Not sure why exactly I put that under the lock, but the only thing that can race here is rmfb while addfb2 is still doing it's thing, with a correctly guess (easy to do since they're fully deterministic) fb_id." Reviewed-by:
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Dave Airlie authored
We don't need to hold the fb lock around the initialisation, only around the list manipulaton. So do the lock hold only around the register for now. From Daniel: Previously fb refcounting, and especially the weak reference (kref_get_unless_zero) used in fb lookups have been protected by fb_lock. But with the refactoring to share refcounting in the drm_mode_object base class that switched to being protected by idr_mutex, which means fb_lock critical sections can be reduced. Reviewed-by:
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Dave Airlie authored
No point have this code dupliated at this point, use the _object_find code instead now. Signed-off-by:
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Dave Airlie authored
This is the initial code to add references to some mode objects. In the future we need to start reference counting connectors so firstly I want to reorganise the code so the framebuffer ref counting uses the same paths. This patch shouldn't change any functionality, just moves the kref. [airlied: move kerneldoc as well] Reviewed-by:
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Dave Airlie authored
Avoids drivers knowing where the kref is stored. [airlied: add kerneldoc] Reviewed-by:
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Dave Airlie authored
Just use the generic function. The main side effect of this is that the fb->base.id is now protected by the idr mutex as well. Reviewed-by:
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Dave Airlie authored
A later patch will use it in framebuffer_init, and I want to keep the diff cleaner. Acked-by:
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Dave Airlie authored
This changes the code to handle being called multiple times without side effects. The new names seems more suitable for what it does. Reviewed-by:
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- 21 Apr, 2016 7 commits
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https://github.com/bbrezillon/linux-at91Dave Airlie authored
This PR contains several improvement and cleanup patches for the atmel-hlcdc driver to be applied on drm-next (targeting 4.7). * 'drm-atmel-hlcdc-devel' of https://github.com/bbrezillon/linux-at91: drm: atmel-hlcdc: route DMA accesses through AHB interfaces drm: atmel-hlcdc: check display mode validity in crtc->mode_fixup() drm: atmel-hlcdc: rework the output code to support drm bridges drm: atmel-hlcdc: move output mode selection in CRTC implementation drm: atmel-hlcdc: support extended timing ranges on sama5d4 and sama5d2 drm: atmel-hlcdc: remove leftovers from atomic mode setting migration drm: atmel-hlcdc: fix connector and encoder types drm: atmel-hlcdc: support asynchronous atomic commit operations drm: atmel-hlcdc: add a ->cleanup_fb() operation
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git://anongit.freedesktop.org/drm-intelDave Airlie authored
- make modeset hw state checker atomic aware (Maarten) - close races in gpu stuck detection/seqno reading (Chris) - tons&tons of small improvements from Chris Wilson all over the gem code - more dsi/bxt work from Ramalingam&Jani - macro polish from Joonas - guc fw loading fixes (Arun&Dave) - vmap notifier (acked by Andrew) + i915 support by Chris Wilson - create bottom half for execlist irq processing (Chris Wilson) - vlv/chv pll cleanup (Ville) - rework DP detection, especially sink detection (Shubhangi Shrivastava) - make color manager support fully atomic (Maarten) - avoid livelock on chv in execlist irq handler (Chris) * tag 'drm-intel-next-2016-04-11' of git://anongit.freedesktop.org/drm-intel: (82 commits) drm/i915: Update DRIVER_DATE to 20160411 drm/i915: Avoid allocating a vmap arena for a single page drm,i915: Introduce drm_malloc_gfp() drm/i915/shrinker: Restrict vmap purge to objects with vmaps drm/i915: Refactor duplicate object vmap functions drm/i915: Consolidate common error handling in intel_pin_and_map_ringbuffer_obj drm/i915/dmabuf: Tighten struct_mutex for unmap_dma_buf drm/i915: implement WaClearTdlStateAckDirtyBits drm/i915/bxt: Reversed polarity of PORT_PLL_REF_SEL bit drm/i915: Rename hw state checker to hw state verifier. drm/i915: Move modeset state verifier calls. drm/i915: Make modeset state verifier take crtc as argument. drm/i915: Replace manual barrier() with READ_ONCE() in HWS accessor drm/i915: Use simplest form for flushing the single cacheline in the HWS drm/i915: Harden detection of missed interrupts drm/i915: Separate out the seqno-barrier from engine->get_seqno drm/i915: Remove forcewake dance from seqno/irq barrier on legacy gen6+ drm/i915: Fixup the free space logic in ring_prepare drm/i915: Simplify check for idleness in hangcheck drm/i915: Apply a mb between emitting the request and hangcheck ...
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Dave Airlie authored
Backmerge 4.6-rc3 for i915. Linux 4.6-rc3
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git://anongit.freedesktop.org/drm-intelDave Airlie authored
misc pull req all over. Biggest thing is the drm_connector_(un)register_all cleanup from Alexey for drivers without the load/unload midlayer hooks. I.e. all the new ones, and a bunch of the pending new atomic drivers depend upon this. Or at least I asked them to rebase ;-) * tag 'topic/drm-misc-2016-04-21' of git://anongit.freedesktop.org/drm-intel: drm: Make drm.debug parameter description more helpful drm: Remove warning from drm_connector_unregister_all() drm: probe_helper: Hide ugly ifdef drm: rcar-du: Use generic drm_connector_register_all() helper drm: atmel_hldc: Use generic drm_connector_register_all() helper drm: Introduce drm_connector_register_all() helper drm: fix lut value extraction function drm/atomic-helper: Print an error if vblank wait times out drm/dp/mst: Restore primary hub guid on resume drm: Release driver references to handle before making it available again drm/i915/dp/mst: Add source port info to debugfs output drm/dp/mst: Enhance DP MST debugfs output drm/edid: Add drm_edid_get_monitor_name() include/drm: Reword debug categories comment. drm/crtc_helper: Reset empty plane state in drm_helper_crtc_mode_set_base() drm/virtio: Drop dummy gamma table support drm/bochs: Drop fake gamma support drm/core: Fix ordering in drm_mode_config_cleanup.
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git://anongit.freedesktop.org/drm-intelDave Airlie authored
struct_mutex cleanups and error paths fixes. Unfortunately I didn't manage to get acks from everyone, but this stuff has been hanging out for months now and imo simple enough to just land the remaining few patches. But separate pull request so that you can take a look yourself. * tag 'topic/struct_mutex-2016-04-21' of git://anongit.freedesktop.org/drm-intel: drm/vma_manage: Drop has_offset drm/vgem: Drop dev->struct_mutex drm/vgem: Move get_pages to gem_create drm/vgem: Simplify dumb_map drm/exynos: drop struct_mutex from fbdev setup drm/exynos: drop struct_mutex from exynos_drm_gem_get_ioctl drm/exynos: drop struct_mutex from exynos_gem_map_sgt_with_dma drm/exynos: Drop dev->struct_mutex from mmap offset function drm/nouveau: Drop dev->struct_mutex from fbdev init drm/qxl: Use unlocked gem unreferencing drm/omapdrm: Use unlocked gem unreferencing drm/nouveau: Use unlocked gem unreferencing
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Ezequiel Garcia authored
Let's be user-friendly and print an actually helpful parameter description. This makes modinfo output the debug parameter like this: parm: debug:Enable debug output, where each bit enables a debug category. Bit 0 (0x01) will enable CORE messages (drm core code) Bit 1 (0x02) will enable DRIVER messages (drm controller code) Bit 2 (0x04) will enable KMS messages (modesetting code) Bit 3 (0x08) will enable PRIME messages (prime code) Bit 4 (0x10) will enable ATOMIC messages (atomic code) Bit 5 (0x20) will enable VBL messages (vblank code) (int) Changes from v1: * Fixed s/PRMIE/PRIME typo. * Add ATOMIC and VBL debug parameter documentation. * Prefix the continuation lines with two tabs and removed the last new line. * Remove spurious whitespace. Signed-off-by:Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Reviewed-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
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Laurent Pinchart authored
Commit 6c87e5c3 ("drm: Rename drm_connector_unplug_all() to drm_connector_unregister_all()") replaced a manual connectors list walk in drm_connector_unregister_all() with drm_for_each_connector(). The list was walked without the mode config mutex locked as that ends up in a clash with sysfs, but drm_connector_unregister_all() warns when the mutex isn't locked. The problem is known and doesn't require a large warning every time drm_connector_unregister_all() is called. Fix it by reverting to manual list walk. Fixes: 6c87e5c3 ("drm: Rename drm_connector_unplug_all() to drm_connector_unregister_all()") Signed-off-by:
Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by:
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- 20 Apr, 2016 17 commits
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Ezequiel Garcia authored
Push the ifdef to the drm_edid.h and create a stub, for the DRM_LOAD_EDID_FIRMWARE=n case. This removes some clutter in the code, making it more readable. Signed-off-by:
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Alexey Brodkin authored
Now that a generic drm_connector_register_all() helper exists we may safely substitute it for the driver-specific implementation of connectors plugging in sysfs. Signed-off-by:
Alexey Brodkin <abrodkin@synopsys.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: David Airlie <airlied@linux.ie> Cc: linux-renesas-soc@vger.kernel.org Acked-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by:
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Alexey Brodkin authored
This driver used to have its own implementation of connector_register_all() which actually was taken as a prototype of drm_connector_register_all(). Now when drm_connector_register_all() exists reusing it here. Signed-off-by:
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Alexey Brodkin authored
As a pair to already existing drm_connector_unregister_all() we're adding generic implementation of what is already done in some drivers. Once this helper is implemented we'll be ready to switch existing driver-specific implementations with the generic one. Signed-off-by:
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Daniel Vetter authored
It's racy, creating mmap offsets is a slowpath, so better to remove it to avoid drivers doing broken things. The only user is i915, and it's ok there because everything (well almost) is protected by dev->struct_mutex in i915-gem. While at it add a note in the create_mmap_offset kerneldoc that drivers must release it again. And then I also noticed that drm_gem_object_release entirely lacks kerneldoc. Cc: David Herrmann <dh.herrmann@gmail.com> Signed-off-by:
Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1459330852-27668-14-git-send-email-daniel.vetter@ffwll.ch
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Daniel Vetter authored
With the previous two changes it doesn't protect anything any more. v2: Use _unlocked unreference variant. v3: Appease gcc noise. Signed-off-by:
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Daniel Vetter authored
vgem doesn't have a shrinker or anything like that and drops backing storage only at object_free time. There's no use in trying to be clever and allocating backing storage delayed, it only causes trouble by requiring locking. Instead grab pages when we allocate the object right away. v2: Fix compiling. Signed-off-by:
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Daniel Vetter authored
The offset manager already checks for existing offsets internally, while holding suitable locks. We can drop this check. v2: Fix title (Emil). Reviewed-by:
Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by:
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Daniel Vetter authored
Doesn't protect anything at all, and probably just here because a long time ago dev->struct_mutex was required to allocate gem objects. With this patch exynos is completely struct_mutex free! Cc: Inki Dae <inki.dae@samsung.com> Signed-off-by:
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Daniel Vetter authored
The only things this protects is reading ->flags and ->size, both of which are invariant over the lifetime of an exynos gem bo. So no locking needed at all (besides that, nothing protects the writers anyway). Aside: exynos_gem_obj->size is redundant with exynos_gem_obj->base.size and probably should be removed. v2: Use _unlocked unreference (Daniel Stone). Cc: Daniel Stone <daniel@fooishbar.org> Cc: Inki Dae <inki.dae@samsung.com> Signed-off-by:
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Daniel Vetter authored
The sg table isn't refcounted, there's no corresponding locking for unmapping and drm_map_sg is ok with being called concurrently. So drop the locking since it doesn't protect anything. Cc: Inki Dae <inki.dae@samsung.com> Signed-off-by:
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Daniel Vetter authored
Simply forgotten about this when I was doing my general cleansing of simple gem mmap offset functions. There's nothing but core functions called here, and they all have their own protection already. Aside: DRM_ERROR for userspace controlled input isn't great, but that's for another patch. v2: Use _unlocked unreference (Daniel Stone). Cc: Daniel Stone <daniel@fooishbar.org> Cc: Inki Dae <inki.dae@samsung.com> Signed-off-by:
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Daniel Vetter authored
Doesn't protect anything at all. With this patch nouveau is completely dev->struct_mutex free! Cc: Ben Skeggs <bskeggs@redhat.com> Signed-off-by:
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Daniel Vetter authored
For drm_gem_object_unreference callers are required to hold dev->struct_mutex, which these paths don't. Enforcing this requirement has become a bit more strict with commit ef4c6270 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Thu Oct 15 09:36:25 2015 +0200 drm/gem: Check locking in drm_gem_object_unreference Cc: Dave Airlie <airlied@redhat.com> Signed-off-by:
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Daniel Vetter authored
For drm_gem_object_unreference callers are required to hold dev->struct_mutex, which these paths don't. Enforcing this requirement has become a bit more strict with commit ef4c6270 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Thu Oct 15 09:36:25 2015 +0200 drm/gem: Check locking in drm_gem_object_unreference Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by:
Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by:
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Daniel Vetter authored
For drm_gem_object_unreference callers are required to hold dev->struct_mutex, which these paths don't. Enforcing this requirement has become a bit more strict with commit ef4c6270 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Thu Oct 15 09:36:25 2015 +0200 drm/gem: Check locking in drm_gem_object_unreference Cc: Ben Skeggs <bskeggs@redhat.com> Signed-off-by:
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Lionel Landwerlin authored
When extracting the value at full precision (16 bits), no need to round the value. This was spotted by Jani when running sparse. Unfortunately this fix doesn't get rid of the warning. Signed-off-by:
Lionel Landwerlin <lionel.g.landwerlin@intel.com> Reported-by:
Emil Velikov <emil.velikov@collabora.com> Signed-off-by:
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- 18 Apr, 2016 1 commit
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Ville Syrjälä authored
Vblank waits timing out is no a normal thing to happen, so let's inform people when it happens. Signed-off-by:
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- 15 Apr, 2016 2 commits
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Lyude authored
Some hubs are forgetful, and end up forgetting whatever GUID we set previously after we do a suspend/resume cycle. This can lead to hotplugging breaking (along with probably other things) since the hub will start sending connection notifications with the wrong GUID. As such, we need to check on resume whether or not the GUID the hub is giving us is valid. Signed-off-by:
Harry Wentland <harry.wentland@amd.com> Signed-off-by:
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Chris Wilson authored
When userspace closes a handle, we remove it from the file->object_idr and then tell the driver to drop its references to that file/handle. However, as the file/handle is already available again for reuse, it may be reallocated back to userspace and active on a new object before the driver has had a chance to drop the old file/handle references. Whilst calling back into the driver, we have to drop the file->table_lock spinlock and so to prevent reusing the closed handle we mark that handle as stale in the idr, perform the callback and then remove the handle. We set the stale handle to point to the NULL object, then any idr_find() whilst the driver is removing the handle will return NULL, just as if the handle is already removed from idr. Note: This will be used to have a direct handle -> vma lookup table, instead of first a handle -> obj lookup, and then an (obj, vm) -> vma lookup. v2: Use NULL rather than an ERR_PTR to avoid having to adjust callers. idr_alloc() tracks existing handles using an internal bitmap, so we are free to use the NULL object as our stale identifier. v3: Needed to update the return value check after changing from using the stale error pointer to NULL. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: dri-devel@lists.freedesktop.org Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Rob Clark <robdclark@gmail.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Thierry Reding <treding@nvidia.com> [danvet: Add note about the use-case.] Signed-off-by:
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