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f2b667b658
linux_dsm_epyc7002/drivers/gpu/drm/i915
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Imre Deak f2b667b658 drm/i915/lspcon: Ensure AUX CH is awake while in DP Sleep state 
Some LSPCON adaptors won't properly wake up in response to an AUX
request after the adaptor was placed to a DP Sink Sleep state (via
writing 0x2 to DP_SET_POWER). Based on the DP 1.4 specification 5.2.5,
the sink may place the AUX CH into a low-power state while in Sleep
state, but should wake it up in response to an AUX request within 1-20ms
(answering with AUX defers while waking it up). As opposed to this at
least the ParadTech PS175 adaptor won't fully wake in response to the
first I2C-over-AUX access and will occasionally ignore the offset in I2C
messages. This can result in accessing the DDC register at offset 0
regardless of the specified offset and the LSPCON detection failing.

To fix this do an initial dummy read from the DPCD area. The PS175 will
defer this access until it's fully woken (taking ~150ms) making sure the
following I2C-over-AUX accesses will work correctly.

Cc: Shashank Sharma <shashank.sharma@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Reference: https://bugs.freedesktop.org/show_bug.cgi?id=98353
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1479755707-29596-2-git-send-email-imre.deak@intel.com
2016-11-23 13:27:29 +02:00
..
gvt drm/i915: rename OACONTROL GEN7_OACONTROL 2016-11-22 14:29:29 +01:00
dvo_ch7xxx.c
dvo_ch7017.c
dvo_ivch.c
dvo_ns2501.c
dvo_sil164.c
dvo_tfp410.c
dvo.h
i915_cmd_parser.c drm/i915: don't whitelist oacontrol in cmd parser 2016-11-22 14:32:42 +01:00
i915_debugfs.c drm/i915: Decouple hang detection from hangcheck period 2016-11-21 14:36:40 +02:00
i915_drv.c drm/i915: Disable hangcheck when wedged 2016-11-22 17:42:17 +00:00
i915_drv.h drm/i915: Add dev.i915.perf_stream_paranoid sysctl option 2016-11-22 14:39:00 +01:00
i915_gem_batch_pool.c drm/i915: Move GEM activity tracking into a common struct reservation_object 2016-10-28 20:53:50 +01:00
i915_gem_batch_pool.h
i915_gem_context.c drm/i915: Wipe hang stats as an embedded struct 2016-11-21 14:36:56 +02:00
i915_gem_dmabuf.c drm/i915: Move GEM activity tracking into a common struct reservation_object 2016-10-28 20:53:50 +01:00
i915_gem_evict.c drm/i915: Enable multiple timelines 2016-10-28 20:53:57 +01:00
i915_gem_execbuffer.c drm/i915: Wipe hang stats as an embedded struct 2016-11-21 14:36:56 +02:00
i915_gem_fence_reg.c drm/i915: Use dev_priv in INTEL_INFO in i915_gem_fence_reg.c 2016-11-17 13:56:06 +00:00
i915_gem_fence_reg.h drm/i915: Split out i915_vma.c 2016-11-11 14:34:54 +02:00
i915_gem_gtt.c drm/i915: add i915_address_space_fini 2016-11-17 21:05:36 +00:00
i915_gem_gtt.h drm/i915: dev_priv cleanup in i915_gem_gtt.c 2016-11-17 13:56:12 +00:00
i915_gem_internal.c drm/i915: Allow shrinking of userptr objects once again 2016-11-01 16:35:26 +00:00
i915_gem_object.h drm/i915: Move frontbuffer CS write tracking from ggtt vma to object 2016-11-18 11:15:59 +00:00
i915_gem_render_state.c drm/i915: Introduce HAS_64BIT_RELOC 2016-11-03 12:45:57 +02:00
i915_gem_render_state.h drm/i915: Reuse the active golden render state batch 2016-10-28 20:53:44 +01:00
i915_gem_request.c drm/i915: Wipe hang stats as an embedded struct 2016-11-21 14:36:56 +02:00
i915_gem_request.h drm/i915/scheduler: Execute requests in order of priorities 2016-11-14 21:01:21 +00:00
i915_gem_shrinker.c drm/i915: Unify global_list into global_link 2016-11-02 15:17:13 +02:00
i915_gem_stolen.c drm/i915: i915_pages_create_for_stolen should return err ptr 2016-11-18 20:48:58 +00:00
i915_gem_tiling.c drm/i915: dev_priv cleanup in i915_gem_tiling.c 2016-11-17 13:56:20 +00:00
i915_gem_timeline.c drm/i915: Create distinct lockclasses for execution vs user timelines 2016-11-14 21:00:21 +00:00
i915_gem_timeline.h drm/i915: Create distinct lockclasses for execution vs user timelines 2016-11-14 21:00:21 +00:00
i915_gem_userptr.c drm/i915: Assorted dev_priv cleanups 2016-11-11 14:58:26 +00:00
i915_gem.c drm/i915: Stop the machine as we install the wedged submit_request handler 2016-11-22 17:42:19 +00:00
i915_gem.h drm/i915: avoid harmless empty-body warning 2016-11-08 17:33:47 +01:00
i915_gpu_error.c drm/i915: Wipe hang stats as an embedded struct 2016-11-21 14:36:56 +02:00
i915_guc_reg.h drm/i915/guc: general tidying up (loader) 2016-09-15 10:56:02 +01:00
i915_guc_submission.c drm/i915/scheduler: Execute requests in order of priorities 2016-11-14 21:01:21 +00:00
i915_ioc32.c
i915_irq.c drm/i915: dev_priv cleanup in i915_irq.c 2016-11-17 13:56:28 +00:00
i915_memcpy.c
i915_mm.c drm/i915: Use remap_io_mapping() to prefault all PTE in a single pass 2016-08-19 17:13:36 +01:00
i915_oa_hsw.c drm/i915: Add more Haswell OA metric sets 2016-11-22 14:40:00 +01:00
i915_oa_hsw.h drm/i915: advertise available metrics via sysfs 2016-11-22 14:38:51 +01:00
i915_params.c drm/i915: rename preliminary_hw_support to alpha_support 2016-11-14 15:33:27 +02:00
i915_params.h drm/i915: rename preliminary_hw_support to alpha_support 2016-11-14 15:33:27 +02:00
i915_pci.c drm/i915/bxt: Broxton decoupled MMIO 2016-11-16 09:33:10 +00:00
i915_perf.c drm/i915: Add a kerneldoc summary for i915_perf.c 2016-11-22 14:40:34 +01:00
i915_pvinfo.h
i915_reg.h drm/i915: Enable i915 perf stream for Haswell OA unit 2016-11-22 14:38:13 +01:00
i915_suspend.c drm/i915: dev_priv cleanup in i915_suspend.c 2016-11-17 13:56:31 +00:00
i915_sw_fence.c drm/i915: Give each sw_fence its own lockclass 2016-11-14 21:00:20 +00:00
i915_sw_fence.h drm/i915: Give each sw_fence its own lockclass 2016-11-14 21:00:20 +00:00
i915_sysfs.c drm/i915: Allow disabling error capture 2016-10-12 12:00:32 +01:00
i915_trace_points.c
i915_trace.h drm/i915: Introduce a global_seqno for each request 2016-10-28 20:53:53 +01:00
i915_vgpu.c Merge tag 'drm-intel-next-2016-09-19' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-09-20 06:23:22 +10:00
i915_vgpu.h
i915_vma.c drm/i915: Move frontbuffer CS write tracking from ggtt vma to object 2016-11-18 11:15:59 +00:00
i915_vma.h drm/i915: Move frontbuffer CS write tracking from ggtt vma to object 2016-11-18 11:15:59 +00:00
intel_acpi.c
intel_atomic_plane.c Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next-queued 2016-11-17 14:32:57 +01:00
intel_atomic.c
intel_audio.c drm/i915: Pass atomic state to intel_audio_codec_enable, v2. 2016-11-09 13:55:05 +01:00
intel_bios.c drm/i915: Assume non-DP++ port if dvo_port is HDMI and there's no AUX ch specified in the VBT 2016-11-14 16:29:46 +02:00
intel_bios.h
intel_breadcrumbs.c drm/i915: Add a warning on shutdown if signal threads still active 2016-11-21 11:49:06 +00:00
intel_color.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_crt.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_csr.c drm/i915: Add more keywords to firmware loading message 2016-11-21 14:35:49 +02:00
intel_ddi.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_device_info.c drm/i915: Don't try to initialize sprite planes on pre-ilk 2016-10-31 16:56:32 +02:00
intel_display.c drm/i915: Always flush the dirty CPU cache when pinning the scanout 2016-11-18 22:33:22 +00:00
intel_dp_aux_backlight.c
intel_dp_link_training.c drm/i915/skl: drop workarounds for A0 and B0 revisions 2016-09-26 12:08:22 +03:00
intel_dp_mst.c drm/i915: Kill dp_encoder_is_mst 2016-11-14 20:27:54 +02:00
intel_dp.c drm/i915: dev_priv cleanup in intel_dp.c 2016-11-17 13:56:39 +00:00
intel_dpio_phy.c drm/i915/bxt: Don't set OCL2_LDOFUSE_PWR_DIS bit in phy init sequence 2016-11-02 09:35:47 +02:00
intel_dpll_mgr.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_dpll_mgr.h drm/i915/dp: Add a standalone function to obtain shared dpll for HSW/BDW/SKL/BXT 2016-09-09 14:53:18 -07:00
intel_drv.h drm/i915: dev_priv cleanup in intel_dp.c 2016-11-17 13:56:39 +00:00
intel_dsi_dcs_backlight.c
intel_dsi_panel_vbt.c drm/i915: Introduce enableddisabled helper 2016-11-17 15:00:36 +00:00
intel_dsi_pll.c drm/i915: Make IS_BROXTON only take dev_priv 2016-10-14 12:23:19 +01:00
intel_dsi.c drm/i915: Make IS_CHERRYVIEW only take dev_priv 2016-10-14 12:23:19 +01:00
intel_dsi.h
intel_dvo.c drm/i915: Pass dev_priv to intel_get_crtc_for_pipe() 2016-11-01 16:40:38 +02:00
intel_engine_cs.c drm/i915/scheduler: Execute requests in order of priorities 2016-11-14 21:01:21 +00:00
intel_fbc.c drm/i915/fbc: convert intel_fbc.c to use INTEL_GEN() 2016-11-14 14:00:29 -02:00
intel_fbdev.c Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next-queued 2016-11-17 14:32:57 +01:00
intel_fifo_underrun.c drm/i915: Always use intel_get_crtc_for_pipe() 2016-11-01 16:40:38 +02:00
intel_frontbuffer.c
intel_frontbuffer.h drm/i915: Move frontbuffer CS write tracking from ggtt vma to object 2016-11-18 11:15:59 +00:00
intel_guc_fwif.h drm/i915: Increase GuC log buffer size to reduce flush interrupts 2016-10-25 09:34:23 +01:00
intel_guc_loader.c drm/i915: Further assorted dev_priv cleanups 2016-11-11 14:58:26 +00:00
intel_guc.h drm/i915/guc: Cache the client mapping 2016-11-03 19:57:43 +00:00
intel_gvt.c Documentation/gpu: Add section for Intel GVT-g host support 2016-10-20 17:18:39 +08:00
intel_gvt.h drm/i915/gvt: clean up intel_gvt.h as interface for i915 core 2016-10-20 17:18:30 +08:00
intel_hangcheck.c drm/i915: Disable hangcheck when wedged 2016-11-22 17:42:17 +00:00
intel_hdmi.c drm/i915: Pass atomic state to intel_audio_codec_enable, v2. 2016-11-09 13:55:05 +01:00
intel_hotplug.c drm/i915: More assorted dev_priv cleanups 2016-11-11 14:58:26 +00:00
intel_i2c.c drm/i915: GMBUS don't need no forcewake 2016-10-17 14:26:42 +03:00
intel_lrc.c drm/i915: fix the dequeue logic for single_port_submission context 2016-11-17 07:56:58 +00:00
intel_lrc.h drm/i915: Make sure engines are idle during GPU idling in LR mode 2016-11-07 14:48:05 +02:00
intel_lspcon.c drm/i915/lspcon: Ensure AUX CH is awake while in DP Sleep state 2016-11-23 13:27:29 +02:00
intel_lvds.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_mocs.c
intel_mocs.h
intel_modes.c
intel_opregion.c drm/i915/opregion: fill in the CADL from connector list, not DIDL 2016-11-17 12:45:59 +02:00
intel_overlay.c drm/i915: Use lockless object free 2016-10-28 20:53:50 +01:00
intel_panel.c drm/i915: Introduce enableddisabled helper 2016-11-17 15:00:36 +00:00
intel_pm.c drm/i915: Introduce enableddisabled helper 2016-11-17 15:00:36 +00:00
intel_psr.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_renderstate.h
intel_ringbuffer.c drm/i915: Defer transfer onto execution timeline to actual hw submission 2016-11-14 21:00:23 +00:00
intel_ringbuffer.h drm/i915: Decouple hang detection from hangcheck period 2016-11-21 14:36:40 +02:00
intel_runtime_pm.c drm/i915: Fix for_each_pipe argument in vlv_display_power_well_init 2016-11-17 13:56:50 +00:00
intel_sdvo_regs.h
intel_sdvo.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_sideband.c
intel_sprite.c Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next-queued 2016-11-17 14:32:57 +01:00
intel_tv.c drm/i915: Assorted INTEL_INFO(dev) cleanups 2016-11-17 13:56:35 +00:00
intel_uncore.c drm/i915: Waterproof verification of gen9 forcewake table ranges 2016-11-17 15:37:44 +00:00
intel_vbt_defs.h drm/i915: Assume non-DP++ port if dvo_port is HDMI and there's no AUX ch specified in the VBT 2016-11-14 16:29:46 +02:00
Kconfig drm/i915: rename preliminary_hw_support to alpha_support 2016-11-14 15:33:27 +02:00
Kconfig.debug drm/i915: Restrict DRM_DEBUG_MM automatic selection 2016-11-09 02:13:48 +01:00
Makefile drm/i915: Add 'render basic' Haswell OA unit config 2016-11-22 14:34:46 +01:00