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6067a27d1f
linux_dsm_epyc7002/drivers/gpu/drm
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Mika Kuoppala 6067a27d1f drm/i915: Avoid tweaking evaluation thresholds on Baytrail v3 
Certain Baytrails, namely the 4 cpu core variants, have been
plaqued by spurious system hangs, mostly occurring with light loads.

Multiple bisects by various people point to a commit which changes the
reclocking strategy for Baytrail to follow its bigger brethen:
commit 8fb55197e6 ("drm/i915: Agressive downclocking on Baytrail")

There is also a review comment attached to this commit from Deepak S
on avoiding punit access on Cherryview and thus it was excluded on
common reclocking path. By taking the same approach and omitting
the punit access by not tweaking the thresholds when the hardware
has been asked to move into different frequency, considerable gains
in stability have been observed.

With J1900 box, light render/video load would end up in system hang
in usually less than 12 hours. With this patch applied, the cumulative
uptime has now been 34 days without issues. To provoke system hang,
light loads on both render and bsd engines in parallel have been used:
glxgears >/dev/null 2>/dev/null &
mpv --vo=vaapi --hwdec=vaapi --loop=inf vid.mp4

So far, author has not witnessed system hang with above load
and this patch applied. Reports from the tenacious people at
kernel bugzilla are also promising.

Considering that the punit access frequency with this patch is
considerably less, there is a possibility that this will push
the, still unknown, root cause past the triggering point on most loads.

But as we now can reliably reproduce the hang independently,
we can reduce the pain that users are having and use a
static thresholds until a root cause is found.

v3: don't break debugfs and simplification (Chris Wilson)

References: https://bugzilla.kernel.org/show_bug.cgi?id=109051
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: fritsch@xbmc.org
Cc: miku@iki.fi
Cc: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
CC: Michal Feix <michal@feix.cz>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Deepak S <deepak.s@linux.intel.com>
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.2+
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1487166779-26945-1-git-send-email-mika.kuoppala@intel.com
2017-02-27 15:19:00 +02:00
..
amd Merge branch 'drm-next-4.11' of git://people.freedesktop.org/~agd5f/linux into drm-next 2017-02-24 08:35:23 +10:00
arc drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
arm drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
armada drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
ast Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
atmel-hlcdc drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
bochs drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
bridge drm/bridge/sii8620: enable interlace modes 2017-02-02 15:15:31 +05:30
cirrus drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
etnaviv drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
exynos Merge branch 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next 2017-02-08 11:34:56 +10:00
fsl-dcu drm/fsl-dcu: check for clk_prepare_enable() error 2017-02-07 20:28:04 -08:00
gma500 drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
hisilicon drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
i2c drm/i2c: tda998x: fix spelling mistake 2016-11-18 00:00:40 +00:00
i810 drm/i810: drop device_is_agp callback 2017-01-26 10:44:43 +01:00
i915 drm/i915: Avoid tweaking evaluation thresholds on Baytrail v3 2017-02-27 15:19:00 +02:00
imx imx-drm: TVE regulator, fb size limit, and ipu-v3 module fixes 2017-02-23 12:10:42 +10:00
lib drm: Add a simple generator of random permutations 2016-12-27 12:34:00 +01:00
mediatek drm: mediatek: use crtc helper drm_crtc_from_index() 2017-01-18 09:21:06 -05:00
meson drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
mga drm/mga: remove device_is_agp callback 2017-01-26 10:45:03 +01:00
mgag200 drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
msm Merge branch 'msm-next' of git://people.freedesktop.org/~robclark/linux into drm-next 2017-02-07 11:05:42 +10:00
mxsfb drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
nouveau Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
omapdrm drm/omapdrm: dispc: Refuse x-decimation above 4 for all but 8-bit formats 2017-02-16 14:11:08 +02:00
panel drm/panel: simple: Specify bus width and flags for EDT displays 2017-01-26 10:57:18 +01:00
qxl drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
r128
radeon Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
rcar-du drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
rockchip drm/rockchip: Use common IOMMU API to attach devices 2017-02-15 08:52:13 +08:00
savage drm: Change the return type of the unload hook to void 2017-01-09 11:25:22 +01:00
selftests drm: kselftest for drm_mm and bottom-up allocation 2017-02-03 11:36:49 +01:00
shmobile drm: Change the return type of the unload hook to void 2017-01-09 11:25:22 +01:00
sis drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
sti drm/sti: fix build warnings in sti_drv.c and sti_vtg.c files 2017-02-23 12:54:54 +10:00
sun4i drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
tdfx drm: define drm_compat_ioctl NULL on CONFIG_COMPAT=n and reduce #ifdefs 2016-11-02 11:33:47 -04:00
tegra drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
tilcdc drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
tinydrm drm/tinydrm: mipi-dbi: Fix field width specifier warning 2017-02-24 12:08:59 +10:00
ttm drm/ttm: fix use-after-free races in vm fault handling 2017-02-21 16:48:45 -05:00
udl drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
vc4 Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
vgem drm/vgem: Switch to reservation_object_lock() helpers 2017-01-24 11:00:23 +01:00
via drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
virtio drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
vmwgfx drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
zte drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
ati_pcigart.c
drm_agpsupport.c drm/i810: drop device_is_agp callback 2017-01-26 10:44:43 +01:00
drm_atomic_helper.c drm/atomic: fix an error code in mode_fixup() 2017-02-08 16:15:42 +01:00
drm_atomic.c Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
drm_auth.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_blend.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_bridge.c drm/bridge: Use recommened kerneldoc for struct member refs 2017-01-02 09:17:26 +01:00
drm_bufs.c
drm_cache.c drm: Update drm_cache.c to pull in the new drm_cache.h 2017-01-24 11:00:22 +01:00
drm_color_mgmt.c drm/color: un-inline drm_color_lut_extract() 2017-01-31 15:31:58 +02:00
drm_connector.c Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c drm/kms-helpers: Use recommened kerneldoc for struct member refs 2017-01-25 16:18:57 +01:00
drm_crtc_internal.h Revert "drm: Resurrect atomic rmfb code, v3" 2017-02-17 12:39:04 +10:00
drm_crtc.c drm: s/drm_crtc_get_hv_timings/drm_mode_get_hv_timings/ 2017-01-26 10:46:28 +01:00
drm_debugfs_crc.c drm: crc: Call wake_up_interruptible() each time there is a new CRC entry 2017-01-06 15:23:19 +01:00
drm_debugfs.c drm/atomic: Remove drm_atomic_debugfs_cleanup() 2017-01-27 09:02:03 +01:00
drm_dma.c
drm_dp_aux_dev.c
drm_dp_dual_mode_helper.c
drm_dp_helper.c drm/kms-helpers: Use recommened kerneldoc for struct member refs 2017-01-25 16:18:57 +01:00
drm_dp_mst_topology.c drm/dp: Store drm_device in MST topology manager 2017-01-25 06:01:48 +01:00
drm_drv.c Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
drm_dumb_buffers.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_edid_load.c
drm_edid.c drm: Clean up the 1366x768 fixup codes 2017-02-01 19:01:47 +02:00
drm_encoder_slave.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_encoder.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_fb_cma_helper.c drm: Rely on mode_config data for fb_helper initialization 2017-02-02 19:12:00 +01:00
drm_fb_helper.c drm: Cancel drm_fb_helper_resume_work on unload 2017-02-08 16:15:42 +01:00
drm_flip_work.c
drm_fops.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_fourcc.c drm: move allocation out of drm_get_format_name() 2016-11-12 14:19:38 +01:00
drm_framebuffer.c Revert "drm: Resurrect atomic rmfb code, v3" 2017-02-17 12:39:04 +10:00
drm_gem_cma_helper.c drm: allow to use mmuless SoC 2017-01-06 11:04:54 +01:00
drm_gem.c drm/gem|prime|mm: Use recommened kerneldoc for struct member refs 2017-01-25 16:20:21 +01:00
drm_global.c drm: Update TTM initialization documentation 2016-12-30 12:52:10 +01:00
drm_hashtab.c
drm_info.c
drm_internal.h drm: remove device_is_agp callback 2017-01-26 10:45:14 +01:00
drm_ioc32.c
drm_ioctl.c drm: Export drm_ioctl_permit to kernel-doc 2016-12-30 12:40:48 +01:00
drm_irq.c drm: Nuke ums vgaarb support 2017-01-26 10:45:31 +01:00
drm_kms_helper_common.c
drm_legacy.h drm: compile drm_vm.c only when needed 2017-01-06 11:03:07 +01:00
drm_lock.c drm: Avoid NULL dereference for DRM_LEGACY debug message 2016-11-28 08:39:41 +01:00
drm_memory.c
drm_mipi_dsi.c
drm_mm.c drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
drm_mode_config.c drm: Show leaked connectors upon unload 2017-01-23 09:26:22 +01:00
drm_mode_object.c drm: Get atomic property value even if DRIVER_ATOMIC is not set 2016-12-27 10:44:33 +01:00
drm_modes.c drm: Clean up the 1366x768 fixup codes 2017-02-01 19:01:47 +02:00
drm_modeset_helper.c drm: Convert all helpers to drm_connector_list_iter 2016-12-18 14:33:22 +01:00
drm_modeset_lock.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_of.c drm: Don't include <drm/drm_encoder.h> in <drm/drm_crtc.h> 2016-12-18 16:29:29 +05:30
drm_panel.c drm/panel: Constify device node argument to of_drm_find_panel() 2017-01-04 08:30:37 +01:00
drm_pci.c drm: remove device_is_agp callback 2017-01-26 10:45:14 +01:00
drm_plane_helper.c drm/kms-helpers: Use recommened kerneldoc for struct member refs 2017-01-25 16:18:57 +01:00
drm_plane.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_platform.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_prime.c drm/prime: Clarify DMA-BUF/GEM Object lifetime 2017-01-27 15:00:26 +01:00
drm_print.c drm/printer: add debug printer 2016-12-30 11:43:40 +01:00
drm_probe_helper.c Merge tag 'drm-misc-next-2017-01-30' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-02-01 08:31:09 +10:00
drm_property.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_rect.c drm/rect: Fix formatting of example code 2016-12-30 13:35:54 +01:00
drm_scatter.c
drm_simple_kms_helper.c drm/doc: use preferred struct reference in kernel-doc 2016-12-30 13:34:59 +01:00
drm_sysfs.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_trace_points.c
drm_trace.h
drm_vm.c mm: use vmf->address instead of of vmf->virtual_address 2016-12-14 16:04:09 -08:00
drm_vma_manager.c drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
Kconfig drm: Add DRM support for tiny LCD displays 2017-02-18 18:04:58 +01:00
Makefile drm: Add DRM support for tiny LCD displays 2017-02-18 18:04:58 +01:00