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60b95d7095
linux/drivers/gpu/drm
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Mario Kleiner 60b95d7095 drm/nouveau/kms: Increase max retries in scanout position queries. 
So far we only allowed for 1 retry and just failed the query
- and thereby high precision vblank timestamping - if we did
not get a reasonable result, as such a failure wasn't considered
all too horrible. There are a few NVidia gpu models out there which
may need a bit more than 1 retry to get a successful query result
under some conditions.

Since Linux 4.4 the update code for vblank counter and timestamp
in drm_update_vblank_count() changed so that the implementation
assumes that high precision vblank timestamping of a kms driver
either consistently succeeds or consistently fails for a given
video mode and encoder/connector combo. Iow. switching from success
to fail or vice versa on a modeset or connector change is ok, but
spurious temporary failure for a given setup can confuse the core
code and potentially cause bad miscounting of vblanks and confusion
or hangs in userspace clients which rely on vblank  stuff, e.g.,
desktop compositors.

Therefore change the max retry count to a larger number - more than
any gpu so far is known to need to succeed, but still low enough
so that these queries which do also happen in vblank interrupt are
still fast enough to be not disastrously long if something would
go badly wrong with them.

As such sporadic retries only happen seldom even on affected gpu's,
this could mean a vblank irq could take a few dozen microseconds
longer every few hours of uptime -- better than a desktop compositor
randomly hanging every couple of hours or days of uptime in a hard
to reproduce manner.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
2017-04-29 22:39:23 +10:00
..
amd Merge tag 'drm-misc-next-2017-03-31' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-04-03 16:30:24 +10:00
arc drm: remove drm_vblank_no_hw_counter assignment from driver code 2017-02-07 21:43:55 +01:00
arm Linux 4.11-rc3 2017-03-23 12:05:13 +10:00
armada drm: Add acquire ctx parameter to ->page_flip(_target) 2017-03-29 09:50:38 +02:00
ast Pointer for Markus's image conversion work. 2017-03-14 15:07:33 +01:00
atmel-hlcdc drm/atmel-hlcdc: Fix suspend/resume implementation 2017-03-16 11:23:59 +01:00
bochs drm: Add acquire ctx parameter to ->page_flip(_target) 2017-03-29 09:50:38 +02:00
bridge drm/bridge: ti-tfp410: support hpd via gpio 2017-03-30 15:06:47 +05:30
cirrus drm/fb-helper: Automatically clean up fb_info 2017-02-07 21:36:28 +01:00
etnaviv sched/headers: Prepare to move the get_task_struct()/put_task_struct() and related APIs from <linux/sched.h> to <linux/sched/task.h> 2017-03-02 08:42:40 +01:00
exynos Linux 4.11-rc4 2017-03-28 17:34:19 +10:00
fsl-dcu drm: Create DEFINE_DRM_GEM_CMA_FOPS and roll it out to drivers 2017-03-14 14:38:34 +01:00
gma500 drm: Add acquire ctx parameter to ->set_config 2017-03-29 09:56:25 +02:00
hisilicon drm: Create DEFINE_DRM_GEM_CMA_FOPS and roll it out to drivers 2017-03-14 14:38:34 +01:00
i2c
i810 drm/i810: drop device_is_agp callback 2017-01-26 10:44:43 +01:00
i915 Merge tag 'drm-misc-next-2017-03-31' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-04-03 16:30:24 +10:00
imx Merge tag 'drm-misc-next-2017-03-21' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-03-23 08:53:41 +10:00
lib
mediatek drm: mediatek: use vblank hooks in struct drm_crtc_funcs 2017-02-21 11:17:54 -05:00
meson drm: Create DEFINE_DRM_GEM_CMA_FOPS and roll it out to drivers 2017-03-14 14:38:34 +01:00
mga lib/vsprintf.c: remove %Z support 2017-02-27 18:43:47 -08:00
mgag200 gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
msm drm: Add acquire ctx parameter to ->update_plane 2017-03-29 09:14:01 +02:00
mxsfb Linux 4.11-rc3 2017-03-23 12:05:13 +10:00
nouveau drm/nouveau/kms: Increase max retries in scanout position queries. 2017-04-29 22:39:23 +10:00
omapdrm drm/omap: Major omap_modeset_init() cleanup 2017-04-03 12:36:40 +03:00
panel drm: panels: Add LVDS panel driver 2017-04-04 17:03:35 +03:00
qxl Merge tag 'drm-misc-next-2017-03-12' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-03-15 11:32:01 +10:00
r128 gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
radeon Merge tag 'drm-misc-next-2017-03-31' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-04-03 16:30:24 +10:00
rcar-du drm: rcar-du: Add HDMI outputs to R8A7795 device description 2017-04-04 17:04:21 +03:00
rockchip drm/rockchip/dsi: correct the grf_switch_reg name 2017-03-24 14:48:58 -04:00
savage
selftests drm: kselftest: fix spelling mistake: "misalinged" -> "misaligned" 2017-02-26 22:54:47 +01:00
shmobile drm: Add acquire ctx parameter to ->page_flip(_target) 2017-03-29 09:50:38 +02:00
sis drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
sti drm: Create DEFINE_DRM_GEM_CMA_FOPS and roll it out to drivers 2017-03-14 14:38:34 +01:00
sun4i drm: Create DEFINE_DRM_GEM_CMA_FOPS and roll it out to drivers 2017-03-14 14:38:34 +01:00
tdfx
tegra drm/tegra: Don't use modeset_lock_crtc 2017-03-27 17:50:47 +02:00
tilcdc drm/tilcdc: Drop calls to modeset_lock_crtc 2017-03-25 22:19:27 +01:00
tinydrm drm/atomic: Introduce drm_atomic_helper_shutdown 2017-03-27 09:43:58 +02:00
ttm drm/ttm: add ttm_bo_init_reserved 2017-03-29 23:53:07 -04:00
udl drm: Add acquire ctx parameter to ->page_flip(_target) 2017-03-29 09:50:38 +02:00
vc4 drm: Add acquire ctx parameter to ->page_flip(_target) 2017-03-29 09:50:38 +02:00
vgem Pointer for Markus's image conversion work. 2017-03-14 15:07:33 +01:00
via drm/via: use get_user_pages_unlocked() 2017-02-28 10:00:50 +01:00
virtio Merge tag 'drm-misc-next-2017-03-12' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-03-15 11:32:01 +10:00
vmwgfx Merge tag 'drm-misc-next-2017-03-31' of git://anongit.freedesktop.org/git/drm-misc into drm-next 2017-04-03 16:30:24 +10:00
zte drm: zte: remove leftover 'inf' from struct zx_hdmi 2017-03-22 13:44:42 +08:00
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: Fixup failure paths in drm_atomic_helper_set_config 2017-03-30 09:36:29 +02:00
drm_atomic.c drm/atomic: Convert get_existing_state callers to get_old/new_state, v4. 2017-03-06 11:43:05 +01:00
drm_auth.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_blend.c drm/blend: Use new atomic iterator macros. 2017-03-06 11:43:43 +01:00
drm_bridge.c
drm_bufs.c
drm_cache.c gpu: drm: core: Convert printk(KERN_<LEVEL> to pr_<level> 2017-02-28 14:32:19 +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 drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c drm: Add acquire ctx parameter to ->set_config 2017-03-29 09:56:25 +02:00
drm_crtc_internal.h drm: Rename drm_mode_object_get() 2017-02-28 16:14:53 +01:00
drm_crtc.c drm/atomic-helper: Remove the backoff hack from set_config 2017-03-29 09:59:16 +02:00
drm_debugfs_crc.c drm: document driver interface for CRC capturing 2017-03-24 09:36:06 +01:00
drm_debugfs.c drm/debugfs: Add kerneldoc 2017-03-24 09:36:06 +01:00
drm_dma.c
drm_dp_aux_dev.c
drm_dp_dual_mode_helper.c drm: Add name for DRM_DP_DUAL_MODE_LSPCON 2017-02-23 11:06:12 -05:00
drm_dp_helper.c drm/dp: Add missing description to parameter 2017-03-07 16:38:16 -05:00
drm_dp_mst_topology.c drm/dp: Split drm_dp_mst_allocate_vcpi 2017-03-22 21:47:44 +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: move edid property update and add modes out of edid firmware loader 2017-02-21 15:41:24 +02:00
drm_edid.c Linux 4.11-rc3 2017-03-23 12:05:13 +10:00
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: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_fb_cma_helper.c drm: Add mode_config .get_format_info() hook 2017-03-22 19:45:00 +02:00
drm_fb_helper.c Linux 4.11-rc4 2017-03-28 17:34:19 +10:00
drm_file.c drm/gem: Add DEFINE_DRM_GEM_FOPS 2017-03-14 14:38:34 +01:00
drm_flip_work.c
drm_fourcc.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux into drm-misc-next 2017-03-23 08:15:55 +01:00
drm_framebuffer.c drm: Add mode_config .get_format_info() hook 2017-03-22 19:45:00 +02:00
drm_gem_cma_helper.c Pointer for Markus's image conversion work. 2017-03-14 15:07:33 +01:00
drm_gem.c drm: Introduce drm_gem_object_{get,put}() 2017-02-28 16:16:43 +01:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h drm/debugfs: Add kerneldoc 2017-03-24 09:36:06 +01:00
drm_ioc32.c gpu: drm: core: Convert printk(KERN_<LEVEL> to pr_<level> 2017-02-28 14:32:19 +01:00
drm_ioctl.c drm: Extract drm_ioctl.h 2017-03-25 22:40:55 +01:00
drm_irq.c drm: Convert cmpxchg(bool) back to a two step operation 2017-03-30 17:15:49 +03:00
drm_kms_helper_common.c drm: Remove drmP.h include from drm_kms_helper_common.c 2017-03-09 16:18:02 +01:00
drm_legacy.h
drm_lock.c sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
drm_memory.c
drm_mipi_dsi.c
drm_mm.c drm: Micro-optimise drm_mm_for_each_node_in_range() 2017-02-06 16:57:37 +01:00
drm_mode_config.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_mode_object.c Pointer for Markus's image conversion work. 2017-03-14 15:07:33 +01:00
drm_modes.c drm: Rename drm_mode_object_get() 2017-02-28 16:14:53 +01:00
drm_modeset_helper.c drm: Add mode_config .get_format_info() hook 2017-03-22 19:45:00 +02:00
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_panel.c
drm_pci.c drm: Extract drm_pci.h 2017-03-09 16:18:02 +01:00
drm_plane_helper.c drm: Add acquire ctx parameter to ->set_config 2017-03-29 09:56:25 +02:00
drm_plane.c drm: Fix locking gotcha in page_flip ioctl 2017-03-30 17:28:24 -07:00
drm_prime.c drm: Extract drm_prime.h 2017-03-09 16:18:02 +01:00
drm_print.c drm: drm_printer: add __printf validation 2017-02-26 21:43:08 +01:00
drm_probe_helper.c Pointer for Markus's image conversion work. 2017-03-14 15:07:33 +01:00
drm_property.c drm: Introduce drm_property_blob_{get,put}() 2017-02-28 16:16:46 +01:00
drm_rect.c
drm_scatter.c
drm_scdc_helper.c drm/edid: detect SCDC support in HF-VSDB 2017-03-21 10:15:56 +02:00
drm_simple_kms_helper.c drm: Clarify the role of plane_state argument to drm_simple update(). 2017-03-30 12:02:00 -07:00
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: Remove drm_pending_event->pid 2017-03-14 14:38:33 +01:00
drm_vm.c drm: remove unnecessary fault wrappers 2017-02-24 17:46:55 -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/fb-helper: Add multi buffer support for cma fbdev 2017-02-26 22:11:37 +01:00
Makefile drm: Add SCDC helpers 2017-03-21 10:15:39 +02:00