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alistair23-linux/drivers/gpu/drm/i915
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Mika Kuoppala 9b18572e83 drm/i915/gen9: Verify and enforce dc6 state writes 
It has been observed that sometimes disabling the dc6 fails
and dc6 state pops back up, brief moment after disabling. This
has to be dmc save/restore timing issue or other bug in the
way dc states are handled.

Try to work around this issue as we don't have firmware fix
yet available. Verify that the value we wrote for the dmc sticks,
and also enforce it by rewriting it, if it didn't.

v2: Zero rereads on rewrite for extra paranoia (Imre)

Testcase: kms_flip/basic-flip-vs-dpms
References: https://bugs.freedesktop.org/show_bug.cgi?id=93768
Cc: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1455811089-27884-1-git-send-email-mika.kuoppala@intel.com
(cherry picked from commit 779cb5d3dd)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2016-02-22 18:37:43 +02:00
..
dvo.h drm/i915: constify intel_dvo_dev_ops structures 2015-12-09 08:21:10 +01:00
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
i915_cmd_parser.c drm/i915: Type safe register read/write 2015-11-18 15:39:11 +02:00
i915_debugfs.c drm/i915: Ensure the HW is powered when accessing the CRC HW block 2016-02-22 17:44:38 +02:00
i915_dma.c Merge tag 'topic/drm-misc-2016-01-17' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-01-18 07:01:16 +10:00
i915_drv.c drm/i915: refine qemu south bridge detection 2016-01-29 09:15:03 +02:00
i915_drv.h drm/i915/gen9: Check for DC state mismatch 2016-02-22 18:37:25 +02:00
i915_gem.c drm/i915: Allow i915_gem_object_get_page() on userptr as well 2016-02-08 10:30:07 +02:00
i915_gem_batch_pool.c
i915_gem_batch_pool.h
i915_gem_context.c drm/i915: Restore inhibiting the load of the default context 2016-01-13 10:47:33 +02:00
i915_gem_debug.c
i915_gem_dmabuf.c drm/i915: remove unused has_dma_mapping flag 2015-07-13 22:42:41 +02:00
i915_gem_evict.c drm/i915: Add soft-pinning API for execbuffer 2015-12-09 10:20:17 +00:00
i915_gem_execbuffer.c drm/i915: Avoid writing relocs with addresses in non-canonical form 2016-01-13 10:41:58 +02:00
i915_gem_fence.c Linux 4.4-rc4 2015-12-08 11:04:26 +10:00
i915_gem_gtt.c Merge branch 'for-linus' into for-next 2016-01-06 21:14:35 +01:00
i915_gem_gtt.h drm/i915: eliminate 'temp' in gen8_for_each_{pdd, pdpe, pml4e} macros 2015-12-10 09:36:42 +01:00
i915_gem_render_state.c drm/i915: mark GEM object pages dirty when mapped & written by the CPU 2015-12-11 18:11:53 +01:00
i915_gem_render_state.h drm/i915: Add provision to extend Golden context batch 2015-07-21 09:30:57 +02:00
i915_gem_shrinker.c drm/i915: Fix kerneldoc for i915_gem_shrink_all 2015-10-13 16:21:03 +03:00
i915_gem_stolen.c Merge branch 'for-linus' into for-next 2016-01-06 21:14:35 +01:00
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: Allow i915_gem_object_get_page() on userptr as well 2016-02-08 10:30:07 +02:00
i915_gpu_error.c drm/i915: Type safe register read/write 2015-11-18 15:39:11 +02:00
i915_guc_reg.h drm/i915: Type safe register read/write 2015-11-18 15:39:11 +02:00
i915_guc_submission.c drm/i915: mark GEM object pages dirty when mapped & written by the CPU 2015-12-11 18:11:53 +01:00
i915_ioc32.c Merge tag 'drm-intel-fixes-2015-07-15' into drm-intel-next-queued 2015-07-15 16:36:50 +02:00
i915_irq.c drm/i915: shut up gen8+ SDE irq dmesg noise, again 2016-01-13 10:48:11 +02:00
i915_params.c Linux 4.4-rc2 2015-11-23 09:04:05 +01:00
i915_reg.h drm/i915: Fix hpd live status bits for g4x 2016-02-17 11:52:54 +02:00
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: Separate cherryview from valleyview 2015-12-10 11:07:24 +01:00
i915_trace.h drm/i915: Type safe register read/write 2015-11-18 15:39:11 +02:00
i915_trace_points.c
i915_vgpu.c drm/i915: Turn __raw_i915_read8() & co. in to inline functions 2015-10-26 16:28:04 +02:00
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.c drm/i915: Calculate watermark related members in the crtc_state, v4. 2015-12-07 10:56:08 +01:00
intel_atomic_plane.c drm/i915: Wait for object idle without locks in atomic_commit, v2. 2015-11-02 15:50:31 +01:00
intel_audio.c Add get_eld audio component for i915/HD-audio 2015-12-11 19:28:27 +01:00
intel_bios.c drm/i915/bios: reduce indent in parse_general_features 2015-12-16 18:02:05 +02:00
intel_bios.h drm/i915: move drmP.h include to i915_drv.h 2015-12-16 18:01:15 +02:00
intel_crt.c drm/i915/crt: Ensure the HW is powered during HW state readout 2016-02-22 17:44:37 +02:00
intel_csr.c drm/i915/gen9: Check for DC state mismatch 2016-02-22 18:37:25 +02:00
intel_ddi.c drm/i915/ddi: Ensure the HW is powered during HW state readout 2016-02-22 17:44:37 +02:00
intel_display.c drm/i915: Ensure the HW is powered during HW access in assert_pipe 2016-02-22 17:44:37 +02:00
intel_dp.c drm/i915/dp: Ensure the HW is powered during HW state readout 2016-02-22 17:44:38 +02:00
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 Merge tag 'topic/drm-misc-2016-01-17' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-01-18 07:01:16 +10:00
intel_drv.h drm/i915: Add helper to get a display power ref if it was already enabled 2016-02-22 17:44:35 +02:00
intel_dsi.c drm/i915/dsi: Ensure the HW is powered during HW state readout 2016-02-22 17:44:39 +02:00
intel_dsi.h drm/i915: fix potential dangling else problems in for_each_ macros 2015-11-25 09:29:32 +01:00
intel_dsi_panel_vbt.c drm/i915/dsi: skip gpio element execution when not supported 2016-02-08 11:36:20 +02:00
intel_dsi_pll.c drm/i915: Separate cherryview from valleyview 2015-12-10 11:07:24 +01:00
intel_dvo.c drm: Pass 'name' to drm_encoder_init() 2015-12-11 09:13:20 +01:00
intel_fbc.c drm/i915: only recompress FBC after flushing a drawing operation 2015-12-03 11:38:11 -02:00
intel_fbdev.c drm/i915: Pin the ifbdev for the info->system_base GGTT mmapping 2015-12-17 16:59:24 +01:00
intel_fifo_underrun.c drm/i915: Introduce bdw_{update,enable,disable}_pipe_irq() 2015-11-26 18:55:39 +02:00
intel_frontbuffer.c drm/i915: fix FBC frontbuffer tracking flushing code 2015-08-05 09:59:44 +02:00
intel_guc.h drm/i915/guc: Clean up locks in GuC 2015-12-03 15:11:54 +01:00
intel_guc_fwif.h drm/i915/guc: Add GuC css header parser 2015-10-21 14:31:34 +02:00
intel_guc_loader.c Linux 4.4-rc2 2015-11-23 09:04:05 +01:00
intel_hdmi.c drm/i915/hdmi: Ensure the HW is powered during HW state readout 2016-02-22 17:44:39 +02:00
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: fix error path in intel_setup_gmbus() 2016-02-10 18:11:34 +02:00
intel_lrc.c drm/i915: Make sure DC writes are coherent on flush. 2016-01-29 09:11:26 +02:00
intel_lrc.h Revert "drm/i915: Extend LRC pinning to cover GPU context writeback" 2015-12-04 17:34:40 +01:00
intel_lvds.c drm/i915/lvds: Ensure the HW is powered during HW state readout 2016-02-22 17:44:40 +02:00
intel_mocs.c drm/i915: Type safe register read/write 2015-11-18 15:39:11 +02:00
intel_mocs.h drm/i915: Added Programming of the MOCS 2015-07-14 17:13:14 +02:00
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: Wait for object idle without locks in atomic_commit, v2. 2015-11-02 15:50:31 +01:00
intel_panel.c drm/i915/backlight: prefer dev_priv over dev pointer 2015-12-18 11:37:44 +02:00
intel_pm.c drm/i915/skl: Ensure HW is powered during DDB HW state readout 2016-02-22 17:44:40 +02:00
intel_psr.c drm/i915: PSR also doesn't have link_entry_time on SKL. 2015-12-11 16:32:56 -08:00
intel_renderstate.h
intel_renderstate_gen6.c
intel_renderstate_gen7.c
intel_renderstate_gen8.c
intel_renderstate_gen9.c
intel_ringbuffer.c drm/i915: Make sure DC writes are coherent on flush. 2016-01-29 09:11:26 +02:00
intel_ringbuffer.h drm/i915: intel_ring_initialized() must be simple and inline 2015-12-10 14:14:36 +01:00
intel_runtime_pm.c drm/i915/gen9: Verify and enforce dc6 state writes 2016-02-22 18:37:43 +02:00
intel_sdvo.c drm: Pass 'name' to drm_encoder_init() 2015-12-11 09:13:20 +01:00
intel_sdvo_regs.h
intel_sideband.c
intel_sprite.c Merge tag 'drm-intel-next-2015-12-18' of git://anongit.freedesktop.org/drm-intel into drm-next 2015-12-23 14:22:09 +10:00
intel_tv.c drm: Pass 'name' to drm_encoder_init() 2015-12-11 09:13:20 +01:00
intel_uncore.c drm/i915: use assert_rpm_wakelock_held instead of opencoding it 2015-12-17 15:59:44 +02:00
Kconfig drm/i915: Remove select to deleted STOP_MACHINE from Kconfig 2016-01-29 09:13:58 +02:00
Makefile drm/i915: Move generic link training code to a separate file 2015-11-05 15:14:56 +02:00