- 15 Jan, 2018 3 commits
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Chris Wilson authored
In order to prevent a race condition where we may end up overaccounting the active state and leaving the busy-stats believing the GPU is 100% busy, lock out the tasklet while we reconstruct the busy state. There is no direct spinlock guard for the execlists->port[], so we need to utilise tasklet_disable() as a synchronous barrier to prevent it, the only writer to execlists->port[], from running at the same time as the enable. Fixes: 4900727d ("drm/i915/pmu: Reconstruct active state on starting busy-stats") Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180115092041.13509-1-chris@chris-wilson.co.ukReviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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Chris Wilson authored
As the timeout mechanism has grown more and more complicated, using multiple deferred tasks and more than doubling the size of our struct, split the two implementations to streamline the simpler no-timeout callback variant. Signed-off-by:
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Chris Wilson authored
Without an accompanying timer (for internal fences), we can free the fence callback immediately as we do not need to employ the RCU barrier to serialise with the timer. By avoiding the RCU delay, we can avoid the extra mempressure under heavy inter-engine request utilisation. Signed-off-by:
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- 12 Jan, 2018 5 commits
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Dhinakaran Pandiyan authored
DPCD read for the eDP is complete by the time intel_psr_init() is called, which means we can avoid initializing PSR structures and state if there is no sink support. Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Reviewed-by:
Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
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Dhinakaran Pandiyan authored
The global variable dev_priv->psr.sink_support is set if an eDP sink supports PSR. Use this instead of redoing the check with is_edp_psr(). Combine source and sink support checks into a macro that can be used to return early from psr_{invalidate, single_frame_update, flush}. Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: -
Dhinakaran Pandiyan authored
This flag has become redundant since commit 4d90f2d5 ("drm/i915: Start tracking PSR state in crtc state") It is set at the same place as psr.enabled, which is also exposed via debugfs. Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
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Tvrtko Ursulin authored
kcalloc is preffered for allocating arrays. Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Fengguang Wu authored
drivers/gpu/drm/i915/i915_pmu.c:795:34-40: ERROR: application of sizeof to pointer sizeof when applied to a pointer typed expression gives the size of the pointer Generated by: scripts/coccinelle/misc/noderef.cocci Fixes: 109ec558 ("drm/i915/pmu: Only enumerate available counters in sysfs") Signed-off-by:
Fengguang Wu <fengguang.wu@intel.com> Reviewed-by:
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- 11 Jan, 2018 4 commits
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Chris Wilson authored
We have a hole in our busy-stat accounting if the pmu is enabled during a long running batch, the pmu will not start accumulating busy-time until the next context switch. This then fails tests that are only sampling a single batch. v2: Count each active port just once (context in/out events are only on the first and last assignment to a port). v3: Avoid hardcoding knowledge of 2 submission ports Fixes: 30e17b78 ("drm/i915: Engine busy time tracking") Testcase: igt/perf_pmu/busy-start Testcase: igt/perf_pmu/busy-double-start Signed-off-by:
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Chris Wilson authored
As we kmalloc our dynamic sysfs attributes, we have to give them an external static lock_class_key for them to use with lockdep. Fixes: 109ec558 ("drm/i915/pmu: Only enumerate available counters in sysfs") Signed-off-by:
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Tvrtko Ursulin authored
Switch over to dynamically creating device attributes, which are in turn used by the perf core to expose available counters in sysfs. This way we do not expose counters which are not avaiable on the current platform, and are so more consistent between what we reply to open attempts via the perf_event_open(2), and what is discoverable in sysfs. v2: * Simplify attribute pointer freeing loop. * Changed attr init from macro to function. * More common error unwind. (Chris Wilson) * Rename some locals. (Chris Wilson) v3: * Fixed double semi-colon. (Chris Wilson) Signed-off-by:
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Tvrtko Ursulin authored
With firmware 1.07 having fixed the state corruption issue, we can enable the headless GT performance workaround for CNL as well. (Equivalent to b6876374 ("drm/i915: Restore GT performance in headless mode with DMC loaded") on other affected platforms.) Signed-off-by:
Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180111082417.795-1-tvrtko.ursulin@linux.intel.com
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- 10 Jan, 2018 2 commits
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Oscar Mateo authored
This register does not contain it. Instead, we have to look into FAULT_TLB_DATA0 & 1 (where, by the way, we can also get the address space). v2: Right formatting v3: - Use 12 (as per the register format) instead of PAGE_SIZE (Chris) - s/BITS_44_TO_47/HIGHBITS (Chris) - Right formatting, this time for real Fixes: b03ec3d6 ("drm/i915: There is only one fault register from GEN8 onwards") Signed-off-by:
Oscar Mateo <oscar.mateo@intel.com> Cc: Michel Thierry <michel.thierry@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/1513982329-32191-1-git-send-email-oscar.mateo@intel.comReviewed-by:
Michel Thierry <michel.thierry@intel.com> Signed-off-by:
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Sagar Arun Kamble authored
While moving code around for solving lockdep issue for GuC log relay, spotted that uc_fini_wq is not being called in failure path in gem_init. Missed in the below commit. Add it. v2: Removed GEM_BUG_ON(!HAS_GUC()) from intel_uc_fini_wq as init happens only based on enable_guc module parameter and does not consider has_guc capability. (Michal) Signed-off-by:
Sagar Arun Kamble <sagar.a.kamble@intel.com> Fixes: 3176ff49 ("drm/i915/guc: Move GuC workqueue allocations outside of the mutex") Cc: Michał Winiarski <michal.winiarski@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Michał Winiarski <michal.winiarski@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1515588857-10283-1-git-send-email-sagar.a.kamble@intel.comSigned-off-by:
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- 09 Jan, 2018 2 commits
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Imre Deak authored
The power domain masks are 64 bit wide, so we need BIT_ULL() when setting bits in them, these ones were missed during converting from 32 to 64 bit masks. All 3 enums are <32 atm, so this didn't cause a real problem. Fixes: d8fc70b7 ("drm/i915: Make power domain masks 64 bit long") Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reported-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180109122040.19425-1-imre.deak@intel.com
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Stefan Brüns authored
The ACK/NACK implementation as found in e.g. the G965 has the falling clock edge and the release of the data line after the ACK for the received byte happen at the same time. This is conformant with the I2C specification, which allows a zero hold time, see footnote [3]: "A device must internally provide a hold time of at least 300 ns for the SDA signal (with respect to the V IH(min) of the SCL signal) to bridge the undefined region of the falling edge of SCL." Some HDMI-to-VGA converters apparently fail to adhere to this requirement and latch SDA at the falling clock edge, so instead of an ACK sometimes a NACK is read and the slave (i.e. the EDID ROM) ends the transfer. The bitbanging releases the data line for the ACK only 1/4 bit time after the falling clock edge, so a slave will see the correct value no matter if it samples at the rising or the falling clock edge or in the center. Fallback to bitbanging is already done for the CRT connector. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92685Signed-off-by:
Stefan Brüns <stefan.bruens@rwth-aachen.de> Cc: stable@vger.kernel.org Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/a39f080b-81a5-4c93-b3f7-7cb0a58daca3@rwthex-w2-a.rwth-ad.de
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- 08 Jan, 2018 1 commit
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Chris Wilson authored
When we retire a signaled fence, we free the dependency tree. However, we skip clearing the list so that if we then try to adjust the priority of the signaled fence, we may walk the list of freed dependencies. [ 3083.156757] ================================================================== [ 3083.156806] BUG: KASAN: use-after-free in execlists_schedule+0x199/0x660 [i915] [ 3083.156810] Read of size 8 at addr ffff8806bf20f400 by task Xorg/831 [ 3083.156815] CPU: 0 PID: 831 Comm: Xorg Not tainted 4.15.0-rc6-no-psn+ #1 [ 3083.156817] Hardware name: Notebook N24_25BU/N24_25BU, BIOS 5.12 02/17/2017 [ 3083.156818] Call Trace: [ 3083.156823] dump_stack+0x5c/0x7a [ 3083.156827] print_address_description+0x6b/0x290 [ 3083.156830] kasan_report+0x28f/0x380 [ 3083.156872] ? execlists_schedule+0x199/0x660 [i915] [ 3083.156914] execlists_schedule+0x199/0x660 [i915] [ 3083.156956] ? intel_crtc_atomic_check+0x146/0x4e0 [i915] [ 3083.156997] ? execlists_submit_request+0xe0/0xe0 [i915] [ 3083.157038] ? i915_vma_misplaced.part.4+0x25/0xb0 [i915] [ 3083.157079] ? __i915_vma_do_pin+0x7c8/0xc80 [i915] [ 3083.157121] ? intel_atomic_state_alloc+0x44/0x60 [i915] [ 3083.157130] ? drm_atomic_helper_page_flip+0x3e/0xb0 [drm_kms_helper] [ 3083.157145] ? drm_mode_page_flip_ioctl+0x7d2/0x850 [drm] [ 3083.157159] ? drm_ioctl_kernel+0xa7/0xf0 [drm] [ 3083.157172] ? drm_ioctl+0x45b/0x560 [drm] [ 3083.157211] i915_gem_object_wait_priority+0x14c/0x2c0 [i915] [ 3083.157251] ? i915_gem_get_aperture_ioctl+0x150/0x150 [i915] [ 3083.157290] ? i915_vma_pin_fence+0x1d8/0x320 [i915] [ 3083.157331] ? intel_pin_and_fence_fb_obj+0x175/0x250 [i915] [ 3083.157372] ? intel_rotation_info_size+0x60/0x60 [i915] [ 3083.157413] ? intel_link_compute_m_n+0x80/0x80 [i915] [ 3083.157428] ? drm_dev_printk+0x1b0/0x1b0 [drm] [ 3083.157443] ? drm_dev_printk+0x1b0/0x1b0 [drm] [ 3083.157485] intel_prepare_plane_fb+0x2f8/0x5a0 [i915] [ 3083.157527] ? intel_crtc_get_vblank_counter+0x80/0x80 [i915] [ 3083.157536] drm_atomic_helper_prepare_planes+0xa0/0x1c0 [drm_kms_helper] [ 3083.157587] intel_atomic_commit+0x12e/0x4e0 [i915] [ 3083.157605] drm_atomic_helper_page_flip+0xa2/0xb0 [drm_kms_helper] [ 3083.157621] drm_mode_page_flip_ioctl+0x7d2/0x850 [drm] [ 3083.157638] ? drm_mode_cursor2_ioctl+0x10/0x10 [drm] [ 3083.157652] ? drm_lease_owner+0x1a/0x30 [drm] [ 3083.157668] ? drm_mode_cursor2_ioctl+0x10/0x10 [drm] [ 3083.157681] drm_ioctl_kernel+0xa7/0xf0 [drm] [ 3083.157696] drm_ioctl+0x45b/0x560 [drm] [ 3083.157711] ? drm_mode_cursor2_ioctl+0x10/0x10 [drm] [ 3083.157725] ? drm_getstats+0x20/0x20 [drm] [ 3083.157729] ? timerqueue_del+0x49/0x80 [ 3083.157732] ? __remove_hrtimer+0x62/0xb0 [ 3083.157735] ? hrtimer_try_to_cancel+0x173/0x210 [ 3083.157738] do_vfs_ioctl+0x13b/0x880 [ 3083.157741] ? ioctl_preallocate+0x140/0x140 [ 3083.157744] ? _raw_spin_unlock_irq+0xe/0x30 [ 3083.157746] ? do_setitimer+0x234/0x370 [ 3083.157750] ? SyS_setitimer+0x19e/0x1b0 [ 3083.157752] ? SyS_alarm+0x140/0x140 [ 3083.157755] ? __rcu_read_unlock+0x66/0x80 [ 3083.157757] ? __fget+0xc4/0x100 [ 3083.157760] SyS_ioctl+0x74/0x80 [ 3083.157763] entry_SYSCALL_64_fastpath+0x1a/0x7d [ 3083.157765] RIP: 0033:0x7f6135d0c6a7 [ 3083.157767] RSP: 002b:00007fff01451888 EFLAGS: 00003246 ORIG_RAX: 0000000000000010 [ 3083.157769] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f6135d0c6a7 [ 3083.157771] RDX: 00007fff01451950 RSI: 00000000c01864b0 RDI: 000000000000000c [ 3083.157772] RBP: 00007f613076f600 R08: 0000000000000001 R09: 0000000000000000 [ 3083.157773] R10: 0000000000000060 R11: 0000000000003246 R12: 0000000000000000 [ 3083.157774] R13: 0000000000000060 R14: 000000000000001b R15: 0000000000000060 [ 3083.157779] Allocated by task 831: [ 3083.157783] kmem_cache_alloc+0xc0/0x200 [ 3083.157822] i915_gem_request_await_dma_fence+0x2c4/0x5d0 [i915] [ 3083.157861] i915_gem_request_await_object+0x321/0x370 [i915] [ 3083.157900] i915_gem_do_execbuffer+0x1165/0x19c0 [i915] [ 3083.157937] i915_gem_execbuffer2+0x1ad/0x550 [i915] [ 3083.157950] drm_ioctl_kernel+0xa7/0xf0 [drm] [ 3083.157962] drm_ioctl+0x45b/0x560 [drm] [ 3083.157964] do_vfs_ioctl+0x13b/0x880 [ 3083.157966] SyS_ioctl+0x74/0x80 [ 3083.157968] entry_SYSCALL_64_fastpath+0x1a/0x7d [ 3083.157971] Freed by task 831: [ 3083.157973] kmem_cache_free+0x77/0x220 [ 3083.158012] i915_gem_request_retire+0x72c/0xa70 [i915] [ 3083.158051] i915_gem_request_alloc+0x1e9/0x8b0 [i915] [ 3083.158089] i915_gem_do_execbuffer+0xa96/0x19c0 [i915] [ 3083.158127] i915_gem_execbuffer2+0x1ad/0x550 [i915] [ 3083.158140] drm_ioctl_kernel+0xa7/0xf0 [drm] [ 3083.158153] drm_ioctl+0x45b/0x560 [drm] [ 3083.158155] do_vfs_ioctl+0x13b/0x880 [ 3083.158156] SyS_ioctl+0x74/0x80 [ 3083.158158] entry_SYSCALL_64_fastpath+0x1a/0x7d [ 3083.158162] The buggy address belongs to the object at ffff8806bf20f400 which belongs to the cache i915_dependency of size 64 [ 3083.158166] The buggy address is located 0 bytes inside of 64-byte region [ffff8806bf20f400, ffff8806bf20f440) [ 3083.158168] The buggy address belongs to the page: [ 3083.158171] page:00000000d43decc4 count:1 mapcount:0 mapping: (null) index:0x0 [ 3083.158174] flags: 0x17ffe0000000100(slab) [ 3083.158179] raw: 017ffe0000000100 0000000000000000 0000000000000000 0000000180200020 [ 3083.158182] raw: ffffea001afc16c0 0000000500000005 ffff880731b881c0 0000000000000000 [ 3083.158184] page dumped because: kasan: bad access detected [ 3083.158187] Memory state around the buggy address: [ 3083.158190] ffff8806bf20f300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 3083.158192] ffff8806bf20f380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 3083.158195] >ffff8806bf20f400: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 3083.158196] ^ [ 3083.158199] ffff8806bf20f480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 3083.158201] ffff8806bf20f500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 3083.158203] ================================================================== Reported-by:Alexandru Chirvasitu <achirvasub@gmail.com> Reported-by:
Mike Keehan <mike@keehan.net> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104436 Fixes: 1f181225 ("drm/i915/execlists: Keep request->priority for its lifetime") Signed-off-by:
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- 05 Jan, 2018 2 commits
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Kenneth Graunke authored
Geminilake requires the 3D driver to select whether barriers are intended for compute shaders, or tessellation control shaders, by whacking a "Barrier Mode" bit in SLICE_COMMON_ECO_CHICKEN1 when switching pipelines. Failure to do this properly can result in GPU hangs. Unfortunately, this means it needs to switch mid-batch, so only userspace can properly set it. To facilitate this, the kernel needs to whitelist the register. The workarounds page currently tags this as applying to Broxton only, but that doesn't make sense. The documentation for the register it references says the bit userspace is supposed to toggle only exists on Geminilake. Empirically, the Mesa patch to toggle this bit appears to fix intermittent GPU hangs in tessellation control shader barrier tests on Geminilake; we haven't seen those hangs on Broxton. v2: Mention WA #0862 in the comment (it doesn't have a name). Signed-off-by:
Kenneth Graunke <kenneth@whitecape.org> Acked-by:
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Anusha Srivatsa authored
There is a new version of DMC available for CNL. The release notes mentions: 1. Fix for the issue where DC_STATE was getting enabled even when disabled by driver causing data corruption v2: Since the firmware is merged to linux-firmware.git, add MODULE_FIRMWARE. v3: rebased. Correct commit message(Jani) Cc: Jani Saarinen <jani.saarinen@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by:
Anusha Srivatsa <anusha.srivatsa@intel.com> Reviewed-by:
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- 04 Jan, 2018 2 commits
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Anusha Srivatsa authored
Since the firmwares are not yet released to public repo, disable them on Geminilake. v2: Remove the firmware versions (Michal) v3: Remove unwanted defines (Rodrigo) Correct commit message (Michal) Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: <stable@vger.kernel.org> Signed-off-by:
Michal Wajdeczko <michal.wajdeczko@intel.com> Signed-off-by:
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Chris Wilson authored
In some iommu, e.g. swiotlb, the available space can be quite limited. So we employ a trial-and-error approach to seeing if our large contiguous chunks can fit, and if that fails we try again with smaller chunks after trying to free our own lazily allocated blobs. As we use a trial-and-error approach, we do not want dma_map_sg() to emit a WARN of its own accord, we want to gracefully report the error back to the caller instead. Note that our noisy culprit, swiotlb, doesn't honour the flag, yet. Signed-off-by:
Matthew Auld <matthew.auld@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180104163842.11635-1-chris@chris-wilson.co.uk
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- 03 Jan, 2018 11 commits
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Chris Wilson authored
We should never insert the invalid seqno into the wait tree, so assert we do not. Signed-off-by:
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Sujaritha Sundaresan authored
Instead of returning -EINVAL, GEM_BUG_ON when GuC reset is invoked for platforms not supporting as we don't expect to invoke it. v2: re-wording commit message and subject (Sagar) Signed-off-by:
Sujaritha Sundaresan <sujaritha.sundaresan@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Michal Wajdeczko <michal.wajdeczko@intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Reviewed-by:
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Sujaritha Sundaresan authored
The Additional Data Struct (ADS) contains objects that are required by GuC post FW load and are not necessarily submission-only. Even with submission disabled we may require something inside the ADS, so it makes more sense for them to be always created. Similarly, we need to access GuC logs and even if GuC submission is disabled, to debug issues with GuC loading or with whatever we're using GuC for. v2: re-wording commit message (Sagar) Signed-off-by:
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Chris Wilson authored
After staring at the list_for_each_safe macros for a bit, our current invocation of list_safe_reset_next in execlists_schedule() simply reduces to list_for_each. Signed-off-by:
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Chris Wilson authored
The dependency chain must be an acyclic graph. This is checked by the swfence, but for sanity, also do a simple check that we do not corrupt our list iteration in execlists_schedule() by a shallow dependency cycle. Signed-off-by:
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Chris Wilson authored
Back up our comment that all signalers should have been signaled before we ourselves were retired with an assert to that effect. Signed-off-by:
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Chris Wilson authored
To modify the global seqno may require rewriting a few registers, which requires us to hold the rpm wakeref. We must therefore take it around the call to i915_gem_set_global_seqno() in debugfs, on behalf of the user. Signed-off-by:
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Chris Wilson authored
Move the register settings for enabling execlists into its own function for clarity. Signed-off-by:
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Chris Wilson authored
Currently, we record the elsp register offset inside init-hw but we only need to do it once during engine setup (after we know the mmio iomapping). Signed-off-by:
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Chris Wilson authored
Move the clearing of the CS-interrupt into the engine reset phase, before the current init-hw phase. This helps clarify that we clear the pending interrupts prior to any restarting of the execlists. Signed-off-by:
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Chris Wilson authored
i915_gem_request_assign() is not used since commit 77f0d0e9 ("drm/i915/execlists: Pack the count into the low bits of the port.request"), so remove the defunct code References: 77f0d0e9 ("drm/i915/execlists: Pack the count into the low bits of the port.request") Signed-off-by:
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- 02 Jan, 2018 2 commits
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Chris Wilson authored
In the selftests, we don't want to force an oom and would rather ENOMEM be reported. In this case, we would rather the allocation for the random array to fail. Signed-off-by:
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Chris Wilson authored
Reduce the number of GGTT PTE operations to speed the test up, but we reduce the likelihood of spotting a coherency error in those operations. However, Broxton is sporadically timing on this test, presumably because its GGTT operations are all uncached. Signed-off-by:
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- 28 Dec, 2017 2 commits
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C, Ramalingam authored
Existing debugfs entry i915_drrs_status is updated with whether PSR is the cause for DRRS disabled state. [v2]: Dropped the module parameter details as ctl moved from module parameter to debugfs. [Rodrigo] [v3]: Crtc ID information is dropped as there is no immediate usecase. [Rodrigo]. Signed-off-by:C, Ramalingam <ramalingam.c@intel.com> Reviewed-by:
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C, Ramalingam authored
Debugfs called i915_drrs_ctl is added to enable and disable the eDP DRRS. Writing 0 will disable the feature, whereas non-zero will enable the feature. Possibility of disabling the DRRS, enables the testing of the frontbuffer tracking based features (FBC, DRRS and PSR) as standalone or any combination of the set. [v2]: ctl interface is moved from module parameter to debugfs [Rodrigo] Signed-off-by:
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- 23 Dec, 2017 1 commit
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Hans de Goede authored
At least on the Chuwi Vi8 (non pro/plus) the LCD panel will show an image shifted aprox. 20% to the left (with wraparound) and sometimes also wrong colors, showing that the panel controller is starting with sampling the datastream somewhere mid-line. This happens after the first blanking and re-init of the panel. After looking at drm.debug output I noticed that initially we inherit the cdclk of 333333 KHz set by the GOP, but after the re-init we picked 266667 KHz, which turns out to be the cause of this problem, a quick hack to hard code the cdclk to 333333 KHz makes the problem go away. I've tested this on various Bay Trail devices, to make sure this not does cause regressions on other devices and the higher cdclk does not cause any problems on the following devices: -GP-electronic T701 1024x600 333333 KHz cdclk after this patch -PEAQ C1010 1920x1200 333333 KHz cdclk after this patch -PoV mobii-wintab-800w 800x1280 333333 KHz cdclk after this patch -Asus Transformer-T100TA 1368x768 320000 KHz cdclk after this patch Also interesting wrt this is the comment in vlv_calc_cdclk about the existing workaround to avoid 200 Mhz as clock because that causes issues in some cases. This commit extends the "do not use 200 Mhz" workaround with an extra check to require atleast 320000 KHz (avoiding 266667 KHz) when a DSI panel is active. Changes in v2: -Change the commit message and the code comment to not treat the GOP as a reference, the GOP should not be treated as a reference Acked-by:
Hans de Goede <hdegoede@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171220105017.11259-1-hdegoede@redhat.com
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- 22 Dec, 2017 3 commits
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Lucas De Marchi authored
Display WA #1183 was recently added to workaround "Failures when enabling DPLL0 with eDP link rate 2.16 or 4.32 GHz and CD clock frequency 308.57 or 617.14 MHz (CDCLK_CTL CD Frequency Select 10b or 11b) used in this enabling or in previous enabling." This workaround was designed to minimize the impact only to save the bad case with that link rates. But HW engineers indicated that it should be safe to apply broadly, although they were expecting the DPLL0 link rate to be unchanged on runtime. We need to cover 2 cases: when we are in fact enabling DPLL0 and when we are just changing the frequency with small differences. This is based on previous patch by Rodrigo Vivi with suggestions from Ville Syrjälä. Cc: Arthur J Runyan <arthur.j.runyan@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: stable@vger.kernel.org Signed-off-by:
Lucas De Marchi <lucas.demarchi@intel.com> Reviewed-by:
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Rodrigo Vivi authored
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Chris Wilson authored
Looking at a CI failure with an ominous line of [ 362.550715] hangcheck current seqno ffffff6b, last ffffff8c, hangcheck ffffff6b [6016 ms], inflight 118 with no apparent cause for the seqno to be negative, left me wondering if someone had scribbled over the HWSP. So include the HWSP in the engine dump to see if there are more signs of random scribbling. v2: Fix row pointer, i is now incremented by 8 so doesn't need scaling by 8, and we don't need to keep volatile here as the status_page isn't marked up as volatile itself. v3: Use hexdump, with suppression of identical lines. (Tvrtko) Which results in HWSP: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 * 00000040 00000001 00000000 00000018 00000002 00000001 00000000 00000018 00000000 00000060 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000003 00000080 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 * 000000c0 00000002 00000000 00000000 00000000 00000000 00000000 00000000 00000000 000000e0 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 * instead of 128 lines of mostly 0s. v4: Tidy up the locals Signed-off-by:
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