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a8ddac7c9f
linux_dsm_epyc7002/drivers/gpu/drm/i915/display
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Imre Deak a8ddac7c9f drm/i915: Avoid HPD poll detect triggering a new detect cycle 
For the HPD interrupt functionality the HW depends on power wells in the
display core domain to be on. Accordingly when enabling these power
wells the HPD polling logic will force an HPD detection cycle to account
for hotplug events that may have happened when such a power well was
off.

Thus a detect cycle started by polling could start a new detect cycle if
a power well in the display core domain gets enabled during detect and
stays enabled after detect completes. That in turn can lead to a
detection cycle runaway.

To prevent re-triggering a poll-detect cycle make sure we drop all power
references we acquired during detect synchronously by the end of detect.
This will let the poll-detect logic continue with polling (matching the
off state of the corresponding power wells) instead of scheduling a new
detection cycle.

Fixes: 6cfe7ec02e ("drm/i915: Remove the unneeded AUX power ref from intel_dp_detect()")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=112125
Reported-and-tested-by: Val Kulkov <val.kulkov@gmail.com>
Reported-and-tested-by: wangqr <wqr.prg@gmail.com>
Cc: Val Kulkov <val.kulkov@gmail.com>
Cc: wangqr <wqr.prg@gmail.com>
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>
Link: https://patchwork.freedesktop.org/patch/msgid/20191028181517.22602-1-imre.deak@intel.com
2019-10-30 16:31:38 +02:00
..
dvo_ch7xxx.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
dvo_ch7017.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
dvo_ivch.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
dvo_ns2501.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
dvo_sil164.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
dvo_tfp410.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
icl_dsi.c drm/i915: Wrappers for display register waits 2019-08-16 22:19:05 +01:00
intel_acpi.c
intel_acpi.h
intel_atomic_plane.c drm/i915: Allow planes to declare their minimum acceptable cdclk 2019-10-24 21:22:25 +03:00
intel_atomic_plane.h drm/i915: Allow planes to declare their minimum acceptable cdclk 2019-10-24 21:22:25 +03:00
intel_atomic.c drm/i915: Rework global state locking 2019-10-24 21:22:25 +03:00
intel_atomic.h drm/i915: Rework global state locking 2019-10-24 21:22:25 +03:00
intel_audio.c drm/i915: Rework global state locking 2019-10-24 21:22:25 +03:00
intel_audio.h
intel_bios.c drm/i915/tgl: Enable DDI/Port G 2019-10-16 16:53:27 -07:00
intel_bios.h drm: Move port definition back to i915 header 2019-08-30 14:08:26 +05:30
intel_bw.c drm/i915/tgl: Add memory type decoding for bandwidth checking 2019-09-25 15:52:08 -07:00
intel_bw.h drm/i915/bw: make intel_atomic_get_bw_state() static 2019-08-07 12:01:46 +03:00
intel_cdclk.c drm/i915: Allow planes to declare their minimum acceptable cdclk 2019-10-24 21:22:25 +03:00
intel_cdclk.h drm/i915: Extract intel_modeset_calc_cdclk() 2019-09-16 14:51:09 +03:00
intel_color.c drm/i915/color: move check of gamma_enable to specific func/platform 2019-10-09 17:13:14 +03:00
intel_color.h drm/i915/display: Add func to compare hw/sw gamma lut 2019-09-04 11:55:30 +03:00
intel_combo_phy.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_combo_phy.h drm/i915/gen11: Convert combo PHY logic to use new 'enum phy' namespace 2019-07-10 18:22:34 -07:00
intel_connector.c drm/i915/dp: Attach colorspace property 2019-10-15 16:24:59 +03:00
intel_connector.h
intel_crt.c drm/i915: Avoid HPD poll detect triggering a new detect cycle 2019-10-30 16:31:38 +02:00
intel_crt.h
intel_ddi.c drm/i915/tgl: add support to one DP-MST stream 2019-10-29 17:44:53 -07:00
intel_ddi.h drm/i915/dp: Add support of BT.2020 Colorimetry to DP MSA 2019-10-15 16:24:59 +03:00
intel_display_power.c drm/i915/tgl: Add AUX B & C to DC_OFF_POWER_DOMAINS 2019-10-29 10:50:34 -07:00
intel_display_power.h drm/i915/tgl: Switch between dc3co and dc5 based on display idleness 2019-10-08 11:05:28 +03:00
intel_display_types.h drm/i915: Allow planes to declare their minimum acceptable cdclk 2019-10-24 21:22:25 +03:00
intel_display.c drm/i915: Fix i845/i865 cursor width 2019-10-29 14:54:51 +02:00
intel_display.h drm/i915: Simplify skl_max_scale() 2019-10-24 21:22:25 +03:00
intel_dp_aux_backlight.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_dp_aux_backlight.h
intel_dp_link_training.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_dp_link_training.h
intel_dp_mst.c drm/i915: fix port checks for MST support on gen >= 11 2019-10-18 17:28:12 -07:00
intel_dp_mst.h drm/i915/mst: un-inline intel_dp_mst_encoder_active_links() 2019-08-07 12:01:51 +03:00
intel_dp.c drm/i915: Avoid HPD poll detect triggering a new detect cycle 2019-10-30 16:31:38 +02:00
intel_dp.h drm/i915/dp: Program an Infoframe SDP Header and DB for HDR Static Metadata 2019-10-15 16:24:59 +03:00
intel_dpio_phy.c drm/i915: Wrappers for display register waits 2019-08-16 22:19:05 +01:00
intel_dpio_phy.h
intel_dpll_mgr.c drm/i915: Fix PCH reference clock for FDI on HSW/BDW 2019-10-25 20:17:11 +03:00
intel_dpll_mgr.h drm/i915: Describe structure member in documentation 2019-10-25 12:06:26 +01:00
intel_dsb.c drm/i915: Pull i915_vma_pin under the vm->mutex 2019-10-04 15:39:02 +01:00
intel_dsb.h drm/i915/dsb: function to trigger workload execution of DSB. 2019-09-23 10:12:26 +03:00
intel_dsi_dcs_backlight.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_dsi_dcs_backlight.h
intel_dsi_vbt.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_dsi.c drm/i915: Don't advertise modes that exceed the max plane size 2019-09-19 20:28:57 +03:00
intel_dsi.h drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_dvo_dev.h
intel_dvo.c drm/i915: Clean up encoder->crtc_mask setup 2019-10-02 18:18:07 +03:00
intel_dvo.h
intel_fbc.c drm/i915: Disable FBC if BIOS reserved memory (stolen) is unavailable 2019-09-12 11:43:48 +01:00
intel_fbc.h
intel_fbdev.c drm/i915/stolen: make the object creation interface consistent 2019-10-04 19:27:41 +01:00
intel_fbdev.h
intel_fifo_underrun.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_fifo_underrun.h
intel_frontbuffer.c drm/i915: Coordinate i915_active with its own mutex 2019-10-04 15:39:12 +01:00
intel_frontbuffer.h drm/i915: Extract intel_frontbuffer active tracking 2019-08-16 09:51:11 +01:00
intel_gmbus.c drm/i915: introduce INTEL_DISPLAY_ENABLED() 2019-09-16 10:20:05 +03:00
intel_gmbus.h drm/i915: Move gmbus definitions out of i915_reg.h 2019-08-16 21:52:49 +01:00
intel_hdcp.c drm/i915/display: Handle fused off HDCP 2019-10-29 12:12:45 -07:00
intel_hdcp.h drm/i915/hdcp: update current transcoder into intel_hdcp 2019-08-30 14:08:30 +05:30
intel_hdmi.c drm/i915: Avoid HPD poll detect triggering a new detect cycle 2019-10-30 16:31:38 +02:00
intel_hdmi.h drm: Move port definition back to i915 header 2019-08-30 14:08:26 +05:30
intel_hotplug.c drm/i915: Prefer encoder->name over port_name() 2019-09-02 18:43:28 +03:00
intel_hotplug.h drm: Move port definition back to i915 header 2019-08-30 14:08:26 +05:30
intel_lpe_audio.c drm/i915: add INTEL_NUM_PIPES() and use it 2019-09-11 22:33:20 +03:00
intel_lpe_audio.h
intel_lspcon.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_lspcon.h
intel_lvds.c drm/i915: Clean up encoder->crtc_mask setup 2019-10-02 18:18:07 +03:00
intel_lvds.h
intel_opregion.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_opregion.h
intel_overlay.c drm/i915/gt: Split intel_ring_submission 2019-10-24 12:14:21 +01:00
intel_overlay.h
intel_panel.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_panel.h
intel_pipe_crc.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_pipe_crc.h
intel_psr.c drm/i915: Use _PICK() for CHICKEN_TRANS() 2019-10-28 12:47:55 +02:00
intel_psr.h drm/i915: Do not unmask PSR interruption in IRQ postinstall 2019-08-22 13:09:24 -07:00
intel_quirks.c drm/i915: rename intel_drv.h to display/intel_display_types.h 2019-08-07 12:43:50 +03:00
intel_quirks.h
intel_sdvo_regs.h
intel_sdvo.c drm/i915: Clean up encoder->crtc_mask setup 2019-10-02 18:18:07 +03:00
intel_sdvo.h drm: Move port definition back to i915 header 2019-08-30 14:08:26 +05:30
intel_sprite.c drm/i915: Add support for half float framebuffers on snb sprites 2019-10-24 21:22:26 +03:00
intel_sprite.h drm/i915: Allow planes to declare their minimum acceptable cdclk 2019-10-24 21:22:25 +03:00
intel_tc.c drm/i915/tc: Update DP_MODE programming 2019-09-27 10:40:17 -07:00
intel_tc.h drm/i915/tc: Update DP_MODE programming 2019-09-27 10:40:17 -07:00
intel_tv.c drm/i915: Clean up encoder->crtc_mask setup 2019-10-02 18:18:07 +03:00
intel_tv.h
intel_vbt_defs.h drm/i915/bios: add compression parameter block definition 2019-10-28 13:34:30 +02:00
intel_vdsc.c drm/i915/dsc: move crtc state dp_dsc_cfg member under dsc as config 2019-10-23 16:28:29 +03:00
intel_vdsc.h
intel_vga.c drm/i915/vga: rename intel_vga_msr_write() to intel_vga_reset_io_mem() 2019-10-06 11:24:53 +03:00
intel_vga.h drm/i915/vga: rename intel_vga_msr_write() to intel_vga_reset_io_mem() 2019-10-06 11:24:53 +03:00
Makefile drm/i915: use upstream version of header tests 2019-07-30 12:11:57 +03:00
vlv_dsi_pll.c drm/i915: Wrappers for display register waits 2019-08-16 22:19:05 +01:00
vlv_dsi.c drm/i915: Use enum pipe consistently 2019-08-23 21:36:01 +03:00