Imre Deak 471bdd0df0 drm/i915/dp_mst: Work around out-of-spec adapters filtering short pulses ... Some TypeC -> native DP adapters, at least the Club 3D CAC-1557 adapter, incorrectly filter out HPD short pulses with a duration less than ~540 usec, leading to MST probe failures. According to the DP Standard 2.0 section 5.1.4: - DP sinks should generate short pulses in the 500 usec -> 1 msec range - DP sources should detect short pulses in the 250 usec -> 2 msec range According to the DP Alt Mode on TypeC Standard section 3.9.2, adapters should detect and forward short pulses according to how sources should detect them as specified in the DP Standard (250 usec -> 2 msec). Based on the above filtering out short pulses with a duration less than 540 usec is incorrect. To make such adapters work add support for a driver polling on MST inerrupt flags, and wire this up in the i915 driver. The sink can clear an interrupt it raised after 110 msec if the source doesn't respond, so use a 50 msec poll period to avoid missing an interrupt. Polling of the MST interrupt flags is explicitly allowed by the DP Standard. This fixes MST probe failures I saw using this adapter and a DELL U2515H monitor. v2: - Fix the wait event timeout for the no-poll case. v3 (Ville): - Fix the short pulse duration limits in the commit log prescribed by the DP Standard. - Add code comment explaining why/how polling is used. - Factor out a helper to schedule the port's hpd irq handler and move it to the rest of hotplug handlers. - Document the new MST callback. - s/update_hpd_irq_state/poll_hpd_irq/ Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200604184500.23730-2-imre.deak@intel.com		2020-06-11 15:28:45 +03:00
..
display	drm/i915/dp_mst: Work around out-of-spec adapters filtering short pulses	2020-06-11 15:28:45 +03:00
gem	drm: Restore the NULL check for drm_gem_object_put()	2020-05-20 17:05:07 +01:00
gt	drm/i915/gt: Fill all the unused space in the GGTT	2020-04-06 10:31:19 -07:00
gvt	Only gvt fixes on this round:	2020-04-08 09:13:10 +10:00
oa	drm/i915: reimplement header test feature	2020-01-02 12:24:10 +02:00
selftests	drm: Garbage collect drm_dev_fini	2020-03-26 15:45:36 +01:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Kconfig	drm/i915: Update drm/i915 bug filing URL	2020-02-17 21:16:45 +02:00
Kconfig.debug	Merge drm/drm-next into drm-intel-next-queued	2019-12-11 11:13:50 +02:00
Kconfig.profile	drm/i915/gen12: Disable preemption timeout	2020-03-12 13:46:01 +00:00
Kconfig.unstable	…
Makefile	drm/i915: remove always-defined CONFIG_AS_MOVNTDQA	2020-04-09 00:01:59 +09:00
i915_active.c	drm/i915: Extend i915_request_await_active to use all timelines	2020-03-11 10:54:59 +00:00
i915_active.h	drm/i915: Extend i915_request_await_active to use all timelines	2020-03-11 10:54:59 +00:00
i915_active_types.h	…
i915_buddy.c	drm/i915/buddy: avoid double list_add	2020-03-06 14:33:08 +00:00
i915_buddy.h	…
i915_cmd_parser.c	drm/i915/cmd_parser: conversion to struct drm_device logging macros.	2020-02-04 11:29:40 +02:00
i915_debugfs.c	Merge remote-tracking branch 'drm/drm-next' into drm-misc-next	2020-03-26 15:11:04 +01:00
i915_debugfs.h	drm/i915: have *_debugfs_init() functions return void.	2020-03-18 16:27:22 +01:00
i915_debugfs_params.c	drm/i915: Include the debugfs params header for its own definition	2020-01-17 13:00:16 +00:00
i915_debugfs_params.h	drm/i915/params: add i915 parameters to debugfs	2020-01-15 15:10:16 +02:00
i915_drv.c	drm/i915: Use devm_drm_dev_alloc	2020-04-28 20:51:33 +02:00
i915_drv.h	drm/i915: Use drmm_add_final_kfree	2020-03-26 15:17:43 +01:00
i915_fixed.h	…
i915_gem.c	drm/i915: significantly reduce the use of <drm/i915_drm.h>	2020-02-27 08:35:09 +02:00
i915_gem.h	i915 features for v5.6:	2019-12-27 15:25:04 +10:00
i915_gem_evict.c	drm/i915: Drop inspection of execbuf flags during evict	2020-03-03 21:52:51 +00:00
i915_gem_fence_reg.c	drm/i915/vgpu: improve vgpu abstractions	2020-03-03 17:46:54 +02:00
i915_gem_fence_reg.h	…
i915_gem_gtt.c	drm/i915: significantly reduce the use of <drm/i915_drm.h>	2020-02-27 08:35:09 +02:00
i915_gem_gtt.h	drm/i915/gtt: split up i915_gem_gtt	2020-01-07 19:27:36 +00:00
i915_getparam.c	…
i915_globals.c	drm/i915: Ratelimit i915_globals_park	2019-12-18 17:38:56 +00:00
i915_globals.h	…
i915_gpu_error.c	drm/i915: Update drm/i915 bug filing URL	2020-02-17 21:16:45 +02:00
i915_gpu_error.h	drm/i915: Track hw reported context runtime	2020-02-16 15:16:22 +00:00
i915_ioc32.c	drm/i915: add i915_ioc32.h for compat	2020-03-02 13:32:37 +02:00
i915_ioc32.h	drm/i915: add i915_ioc32.h for compat	2020-03-02 13:32:37 +02:00
i915_irq.c	UAPI Changes:	2020-03-19 10:40:27 +10:00
i915_irq.h	drm/i915: Convert to CRTC VBLANK callbacks	2020-02-13 13:08:13 +01:00
i915_memcpy.c	drm/i915: remove always-defined CONFIG_AS_MOVNTDQA	2020-04-09 00:01:59 +09:00
i915_memcpy.h	drm/i915: Align start for memcpy_from_wc	2019-12-11 22:40:41 +00:00
i915_mm.c	drm/i915/gem: Extend mmap support for lmem	2020-01-04 17:57:46 +00:00
i915_params.c	drm/i915: Remove 'prefault_disable' modparam	2020-01-27 11:45:35 +00:00
i915_params.h	drm/i915: Mark i915.reset as unsigned	2020-02-05 18:51:52 +00:00
i915_pci.c	drm/i915: Use devm_drm_dev_alloc	2020-04-28 20:51:33 +02:00
i915_perf.c	drm/i915/perf: Invalidate OA TLB on when closing perf stream	2020-03-20 07:04:44 -07:00
i915_perf.h	drm/i915/perf: Register sysctl path globally	2019-12-13 20:16:23 +00:00
i915_perf_types.h	drm/i915/perf: Reintroduce wait on OA configuration completion	2020-03-04 13:49:26 +02:00
i915_pmu.c	drm/i915/pmu: Avoid using globals for PMU events	2020-02-26 14:07:50 +02:00
i915_pmu.h	drm/i915: significantly reduce the use of <drm/i915_drm.h>	2020-02-27 08:35:09 +02:00
i915_priolist_types.h	…
i915_pvinfo.h	…
i915_query.c	…
i915_query.h	…
i915_reg.h	drm/i915/dp: Register definition for DP compliance register	2020-04-08 14:41:03 +02:00
i915_request.c	drm/i915: Defer semaphore priority bumping to a workqueue	2020-03-11 23:12:39 +02:00
i915_request.h	drm/i915: Defer semaphore priority bumping to a workqueue	2020-03-11 23:12:39 +02:00
i915_scatterlist.c	…
i915_scatterlist.h	…
i915_scheduler.c	drm/i915: Tweak scheduler's kick_submission()	2020-03-10 23:12:38 +00:00
i915_scheduler.h	…
i915_scheduler_types.h	…
i915_selftest.h	…
i915_suspend.c	drm/i915: significantly reduce the use of <drm/i915_drm.h>	2020-02-27 08:35:09 +02:00
i915_suspend.h	…
i915_sw_fence.c	drm/i915/gem: Don't leak non-persistent requests on changing engines	2020-02-11 21:58:39 +00:00
i915_sw_fence.h	drm/i915/gem: Don't leak non-persistent requests on changing engines	2020-02-11 21:58:39 +00:00
i915_sw_fence_work.c	drm/i915: Unpin vma->obj on early error	2019-12-18 10:13:03 +00:00
i915_sw_fence_work.h	…
i915_switcheroo.c	drm: Avoid drm_global_mutex for simple inc/dec of dev->open_count	2020-01-24 17:41:34 +00:00
i915_switcheroo.h	…
i915_syncmap.c	…
i915_syncmap.h	…
i915_sysfs.c	drm/i915/gt: Expose engine properties via sysfs	2020-02-28 22:03:19 +00:00
i915_sysfs.h	…
i915_trace.h	drm/i915/trace: i915_request.prio is a signed value	2020-01-28 15:53:36 +00:00
i915_trace_points.c	…
i915_user_extensions.c	…
i915_user_extensions.h	…
i915_utils.c	drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED panel	2020-03-03 20:34:32 -05:00
i915_utils.h	drm/i915: be more solid in checking the alignment	2020-03-11 23:12:39 +02:00
i915_vgpu.c	drm/i915/vgpu: improve vgpu abstractions	2020-03-03 17:46:54 +02:00
i915_vgpu.h	drm/i915/vgpu: improve vgpu abstractions	2020-03-03 17:46:54 +02:00
i915_vma.c	drm/i915: Avoid live-lock with i915_vma_parked()	2020-03-26 10:21:30 -07:00
i915_vma.h	drm/i915: Use the async worker to avoid reclaim tainting the ggtt->mutex	2020-01-30 21:35:43 +00:00
i915_vma_types.h	drm/i915/gem: Extract transient execbuf flags from i915_vma	2020-03-03 21:52:51 +00:00
intel_device_info.c	drm/i915: significantly reduce the use of <drm/i915_drm.h>	2020-02-27 08:35:09 +02:00
intel_device_info.h	drm/i915: Read rawclk_freq earlier	2020-02-19 14:09:18 +00:00
intel_dram.c	drm/i915/dram: hide the dram structs better	2020-03-02 13:32:27 +02:00
intel_dram.h	drm/i915: split out intel_dram.[ch] from i915_drv.c	2020-02-27 09:16:01 +02:00
intel_gvt.c	drm/i915/gvt: make intel_gvt_active internal to intel_gvt	2020-03-03 17:47:03 +02:00
intel_gvt.h	…
intel_memory_region.c	drm/i915: convert to new logging macros in i915/intel_memory_region.c	2020-01-17 17:44:19 +02:00
intel_memory_region.h	drm/i915: lookup for mem_region of a mem_type	2020-01-05 01:08:09 +00:00
intel_pch.c	drm/i915: Make WARN* drm specific where drm_priv ptr is available	2020-01-22 17:54:33 +02:00
intel_pch.h	…
intel_pm.c	drm/i915: Implement display w/a 1140 for glk/cnl	2020-03-05 15:53:33 +02:00
intel_pm.h	drm/i915: Manipulate DBuf slices properly	2020-02-05 19:19:23 +02:00
intel_region_lmem.c	drm/i915/lmem: use new struct drm_device based logging macros.	2020-01-10 16:11:04 +02:00
intel_region_lmem.h	…
intel_runtime_pm.c	…
intel_runtime_pm.h	…
intel_sideband.c	drm for 5.7-rc1	2020-04-01 15:24:20 -07:00
intel_sideband.h	…
intel_uncore.c	drm/i915: Make WARN* drm specific where uncore or stream ptr is available	2020-01-22 17:57:39 +02:00
intel_uncore.h	…
intel_wakeref.c	drm/i915/gt: Flush ongoing retires during wait_for_idle	2020-01-03 00:33:07 +00:00
intel_wakeref.h	drm/i915/gt: Flush ongoing retires during wait_for_idle	2020-01-03 00:33:07 +00:00
intel_wopcm.c	…
intel_wopcm.h	…
vlv_suspend.c	drm/i915: switch vlv_suspend to use intel uncore register accessors	2020-02-17 11:29:51 +02:00
vlv_suspend.h	drm/i915: split out vlv/chv specific suspend/resume code	2020-02-17 11:29:35 +02:00