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5b421c57e0
linux_dsm_epyc7002/drivers/gpu/drm/i915
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Ville Syrjälä 5b421c57e0 drm/i915: Disable FDI RX before DDI_BUF_CTL 
Bspec is confused w.r.t. the HSW/BDW FDI disable sequence. It lists
FDI RX disable both as step 13 and step 18 in the sequence. But I dug
up an old BUN mail from Art that moved the FDI RX disable to happen
before DDI_BUF_CTL disable. That BUN did not renumber the steps and just
added a note:
"Workaround: Disable PCH FDI Receiver before disabling DDI_BUF_CTL."

The BUN described the symptoms of the fixed issue as:
"PCH display underflow and a black screen on the analog CRT port that
happened after a FDI re-train"

I suppose later someone tried to renumber the steps to match, but forgot
to remove the FDI RX disable from its old position in the sequence.

They also forgot to update the note describing what should be done in
case of an FDI training failure. Currently it says:
"To retry FDI training, follow the Disable Sequence steps to Disable FDI,
but skip the steps related to clocks and PLLs (16, 19, and 20), ..."

It should really say "17, 20, and 21" with the current sequence because
those are the steps that deal with PLLs and whatnot, after step 13 became
FDI RX disable. And had the step 18 FDI RX disable been removed, as I
suspect it should have, the note should actually say "17, 19, and 20".

So, let's move the FDI RX disable to happen before DDI_BUF_CTL disable,
as that would appear to be the correct order based on the BUN.

Note that Art has since unconfused the spec, and so this patch should
now match the steps listed in the spec.

v2: Add a note that the spec is now correct

Cc: Paulo Zanoni <przanoni@gmail.com>
Cc: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1456841783-4779-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
2016-04-01 22:04:14 +03:00
..
dvo_ch7xxx.c drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
dvo_ch7017.c drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
dvo_ivch.c drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
dvo_ns2501.c drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
dvo_sil164.c drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
dvo_tfp410.c drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
dvo.h drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
i915_cmd_parser.c drm/i915: Bump command parser version for new whitelisted registers 2016-03-21 10:03:26 +01:00
i915_debugfs.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_dma.c Revert "drm/i915: Fix races on fbdev" 2016-04-01 15:03:55 +03:00
i915_drv.c drm/i915/kbl: Remove preliminary_hw_support protection from KBL. 2016-03-30 10:51:53 -07:00
i915_drv.h drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_gem_batch_pool.c
i915_gem_batch_pool.h
i915_gem_context.c drm/i915: replace for_each_engine() 2016-03-24 14:34:11 +00:00
i915_gem_debug.c drm/i915: replace for_each_engine() 2016-03-24 14:34:11 +00:00
i915_gem_dmabuf.c drm/i915: Use CPU mapping for userspace dma-buf mmap() 2016-02-09 11:21:03 +01:00
i915_gem_evict.c drm/i915: Rename vma->*_list to *_link for consistency 2016-02-26 13:15:39 +00:00
i915_gem_execbuffer.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_gem_fence.c Linux 4.4-rc4 2015-12-08 11:04:26 +10:00
i915_gem_gtt.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_gem_gtt.h drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_gem_render_state.c drm/i915: Rename intel_engine_cs struct members 2016-03-16 15:33:17 +00:00
i915_gem_render_state.h drm/i915: Rename intel_engine_cs function parameters 2016-03-16 15:33:10 +00:00
i915_gem_shrinker.c drm/i915: Rename vma->*_list to *_link for consistency 2016-02-26 13:15:39 +00:00
i915_gem_stolen.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_gem_tiling.c drm/i915: get runtime PM reference around GEM set_tiling IOCTL 2015-11-17 18:43:30 +02:00
i915_gem_userptr.c drm/i915: Avoid snooping with userptr where not supported 2016-03-02 13:46:21 +00:00
i915_gem.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_gpu_error.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_guc_reg.h drm/i915/guc: Add GuC ADS (Addition Data Structure) - allocation 2016-01-05 11:33:34 +01:00
i915_guc_submission.c drm/i915: replace for_each_engine() 2016-03-24 14:34:11 +00:00
i915_ioc32.c
i915_irq.c drm/i915: Exit cherryview_irq_handler() after one pass 2016-03-30 14:24:01 +01:00
i915_params.c drm/i915: Add fault injection support 2016-03-17 15:22:09 +02:00
i915_params.h drm/i915: Add fault injection support 2016-03-17 15:22:09 +02:00
i915_reg.h drm/i915: BXT DDI PHY sequence BUN 2016-04-01 13:05:58 +03:00
i915_suspend.c drm/i915/bxt: Don't save/restore eDP panel power during suspend (v3) 2016-02-08 11:32:32 +02:00
i915_sysfs.c drm/i915: Hold RPM reference while setting freq limits through sysfs 2016-03-02 18:50:47 +02:00
i915_trace_points.c
i915_trace.h drm/i915: More intel_engine_cs renaming 2016-03-16 15:33:24 +00:00
i915_vgpu.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
i915_vgpu.h drm/i915: Type safe register read/write 2015-11-18 15:39:11 +02:00
intel_acpi.c drm/i915: Drop unnecessary #include <linux/vga_switcheroo.h> 2015-10-13 10:18:38 +02:00
intel_atomic_plane.c drm/i915: Pass the correct crtc state to .update_plane() 2016-03-10 13:49:31 +02:00
intel_atomic.c drm/i915: Remove some post-commit members from intel_crtc->atomic, v3. 2016-03-16 14:50:25 +01:00
intel_audio.c drm/i915: Move load time init of display/audio hooks earlier 2016-03-17 15:22:04 +02:00
intel_bios.c drm/i915: remove unused dev_priv->render_reclock_avail 2016-03-29 15:12:40 +03:00
intel_bios.h drm/i915: hide away VBT private data in a separate header 2016-03-17 11:58:57 +02:00
intel_color.c drm/i915: Do not check crtc_state->active in intel_color_load_luts. 2016-03-31 12:46:07 +02:00
intel_crt.c drm/i915: Move HSW/BDW pll selection logic to intel_dpll_mgr.c 2016-03-09 11:55:31 +02:00
intel_csr.c drm/i915/csr: Allow matching unknown HW steppings with generic firmware 2016-03-16 17:53:00 +02:00
intel_ddi.c drm/i915: Disable FDI RX before DDI_BUF_CTL 2016-04-01 22:04:14 +03:00
intel_display.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
intel_dp_link_training.c drm/i915/dp: reduce missing TPS3 support errors to debug logging 2016-02-08 11:37:17 +02:00
intel_dp_mst.c drm/i915: Fix race condition in intel_dp_destroy_mst_connector() 2016-03-17 09:12:28 +01:00
intel_dp.c drm/i915: force full detect on sink count change 2016-04-01 10:20:22 +03:00
intel_dpll_mgr.c drm/i915: Add locking to pll updates, v3. 2016-03-31 09:43:11 +02:00
intel_dpll_mgr.h drm/i915: Use a crtc mask instead of a refcount for dpll functions, v2. 2016-03-17 09:27:28 +01:00
intel_drv.h drm/i915: Read sink_count dpcd always 2016-04-01 10:20:21 +03:00
intel_dsi_panel_vbt.c drm/i915/dsi: refer to gpio index instead of gpio to avoid confusion 2016-04-01 14:30:24 +03:00
intel_dsi_pll.c drm/i915/bxt: Fix DSI HW state readout 2016-03-24 14:48:21 +02:00
intel_dsi.c drm/i915/bxt: Fix DSI HW state readout 2016-03-24 14:48:21 +02:00
intel_dsi.h drm/i915/bxt: Fix DSI HW state readout 2016-03-24 14:48:21 +02:00
intel_dvo.c drm: Pass 'name' to drm_encoder_init() 2015-12-11 09:13:20 +01:00
intel_fbc.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
intel_fbdev.c Revert "drm/i915: Fix races on fbdev" 2016-04-01 15:03:55 +03:00
intel_fifo_underrun.c drm/i915: make transcoder_name return a string 2016-03-16 18:09:53 +02:00
intel_frontbuffer.c
intel_guc_fwif.h drm/i915/guc: Decouple GuC engine id from ring id 2016-01-25 10:56:30 +00:00
intel_guc_loader.c drm/i915: replace for_each_engine() 2016-03-24 14:34:11 +00:00
intel_guc.h drm/i915/guc: Decouple GuC engine id from ring id 2016-01-25 10:56:30 +00:00
intel_hdmi.c Merge drm-fixes into drm-next. 2016-03-14 09:46:02 +10:00
intel_hotplug.c drm/i915: intel_hpd_init(): Fix suspend/resume reprobing 2016-01-13 10:49:42 +02:00
intel_i2c.c drm/i915: Actually retry with bit-banging after GMBUS timeout 2016-03-11 10:23:28 +02:00
intel_lrc.c drm/i915: replace for_each_engine() 2016-03-24 14:34:11 +00:00
intel_lrc.h drm/i915: Rename intel_engine_cs function parameters 2016-03-16 15:33:10 +00:00
intel_lvds.c drm/i915: fix deadlock on lid open 2016-03-30 12:17:13 +02:00
intel_mocs.c drm/i915: introduce for_each_engine_id() 2016-03-24 14:34:06 +00:00
intel_mocs.h
intel_modes.c drm/i915: Add HDMI aspect ratio property for SDVO 2015-09-30 10:20:12 +02:00
intel_opregion.c drm/i915/opregion: handle VBT sizes bigger than 6 KB 2015-12-17 11:40:57 +02:00
intel_overlay.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
intel_panel.c drm/i915/panel: setup pwm backlight based on connector type 2016-03-16 18:28:50 +02:00
intel_pm.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
intel_psr.c Revert "drm/i915: Enable PSR by default on Valleyview and Cherryview." 2016-03-10 13:49:22 +02:00
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_renderstate.h
intel_ringbuffer.c drm/i915: Refer to GGTT {,VM} consistently 2016-03-31 17:55:43 +03:00
intel_ringbuffer.h drm/i915: Use an array of register tables in command parser 2016-03-21 10:02:01 +01:00
intel_runtime_pm.c drm/i915/bxt: add dsi transcoders 2016-03-21 12:58:58 +02:00
intel_sdvo_regs.h drm/i915/sdvo: revert bogus kernel-doc comments to normal comments 2016-01-20 10:21:34 +02:00
intel_sdvo.c drm/i915: move sdvo mappings to vbt data 2016-03-29 15:12:30 +03:00
intel_sideband.c drm/i915: Extend gpio read/write to other cores 2016-02-04 19:11:17 +02:00
intel_sprite.c drm/i915: Pass drm_frambuffer to intel_compute_page_offset() 2016-03-01 12:48:09 +02:00
intel_tv.c drm/i915: move VBT based TV presence check to intel_bios.c 2016-03-16 18:28:07 +02:00
intel_uncore.c drm/i915: Rename __force_wake_get to __force_wake_auto 2016-03-30 12:02:21 +01:00
intel_vbt_defs.h drm/i915: hide away VBT private data in a separate header 2016-03-17 11:58:57 +02:00
Kconfig drm/i915: Kconfig for extra driver debugging 2016-03-03 17:26:57 +00:00
Kconfig.debug drm/i915: Kconfig for extra driver debugging 2016-03-03 17:26:57 +00:00
Makefile drm/i915: Extract out gamma table and CSC to their own file 2016-03-21 11:39:08 -07:00