- 15 Nov, 2017 5 commits
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Ville Syrjälä authored
Apparently there are some machines that put semi-sensible looking values into the stolen "reserved" base and size, except those values are actually outside the stolen memory. There is a bit in the register which supposedly could tell us whether the reserved area is even enabled or not. Let's check for that before we go trusting the base and size. Cc: Tomi Sarvela <tomi.p.sarvela@intel.com> Signed-off-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171102151737.23336-1-ville.syrjala@linux.intel.comReviewed-by:
Paulo Zanoni <paulo.r.zanoni@intel.com>
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Ville Syrjälä authored
Fix copy/paste fail in kerneldocs for intel_audio_codec_disable(). Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Suggested-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
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Hans de Goede authored
Quoting Ville: "the forcewake timer might still be active until the uncore suspend, and having active forcewakes while we've already told the GT wake stuff to stop acting normally doesn't seem quite right to me." Reported-by:
Imre Deak <imre.deak@intel.com> Reviewed-by:
Hans de Goede <hdegoede@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171114135518.15981-3-hdegoede@redhat.com
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Hans de Goede authored
intel_uncore_suspend() unregisters the uncore code's PMIC bus access notifier and gets called on both normal and runtime suspend. intel_uncore_resume_early() re-registers the notifier, but only on normal resume. Add a new intel_uncore_runtime_resume() function which only re-registers the notifier and call that on runtime resume. Cc: stable@vger.kernel.org Reported-by:
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Hans de Goede authored
assert_rpm_wakelock_held is triggered from i915_pmic_bus_access_notifier even though it gets unregistered on (runtime) suspend, this is caused by a race happening under the following circumstances: intel_runtime_pm_put does: atomic_dec(&dev_priv->pm.wakeref_count); pm_runtime_mark_last_busy(kdev); pm_runtime_put_autosuspend(kdev); And pm_runtime_put_autosuspend calls intel_runtime_suspend from a workqueue, so there is ample of time between the atomic_dec() and intel_runtime_suspend() unregistering the notifier. If the notifier gets called in this windowd assert_rpm_wakelock_held falsely triggers (at this point we're not runtime-suspended yet). This commit adds disable_rpm_wakeref_asserts and enable_rpm_wakeref_asserts calls around the intel_uncore_forcewake_get(FORCEWAKE_ALL) call in i915_pmic_bus_access_notifier fixing the false-positive WARN_ON. Changes in v2: -Reword comment explaining why disabling the wakeref asserts is ok and necessary Cc: stable@vger.kernel.org Reported-by:
FKr <bugs-freedesktop@ubermail.me> Reviewed-by:
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- 14 Nov, 2017 14 commits
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Chris Wilson authored
smatch does not track initialised values as well as gcc, and this triggers many warnings by smatch not presented by gcc. Silence smatch by initialising the error values to -ENODEV, which we use to denote internal errors. (If we see a selftest fail with a silent -ENODEV, we know smatch was right!) v2: smatch was right about igt_create_vma(), it may unlikely fail on the first object allocation which we want to be loud about. Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171114223346.25958-1-chris@chris-wilson.co.ukReviewed-by:
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Chris Wilson authored
Resuming GEM presumes it can talk to hw, in particular to ensure the kernel context is loaded upon resume for powersaving. If the GuC is still asleep at this point, we upset the HW. Rearrange the resume such that we restore the original order of init-hw, resume-guc, use-gem. Fixes: 37cd3300 ("drm/i915: Remove redundant intel_autoenable_gt_powersave()") References: a1c41994 ("drm/i915/guc: Add host2guc notification for suspend and resume") Signed-off-by:
Sagar Arun Kamble <sagar.a.kamble@intel.com>
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Rodrigo Vivi authored
Display is not sending a PMRsp when a PMReq is received at the same time that all planes are turned off. State machine in the dcprunit is stuck in the WAIT4DONE state which means that there is no fill_done. WA: disable arbiter clock gating, set bit [27] of 0x46530 v2: As Ville pointed out, based on the description the issue can happen when disabling the planes, similar to WaRsPkgCStateDisplayPMReq:hsw Also description of the issue was updated on commit message to make it more clear that we need this earlier. v3: Restore comment about possibility to system hang to where we are sure about it, without speculation. (Ville). v4: Remove doubled sob. Actually do v3 changes :/ Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:Rodrigo Vivi <rodrigo.vivi@intel.com> Reviewed-by:
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Rodrigo Vivi authored
Catchup with upstream. Signed-off-by: -
Chris Wilson authored
Having removed the preproduction Broxton support (see commit 0102ba1f ("drm/i915: Add early BXT sdv to the list of preproduction machines")), we know we then always need the production Broxton workaround set and do not need a predicate upon revision. Signed-off-by:
Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171114134340.5439-2-chris@chris-wilson.co.uk
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Chris Wilson authored
We've begun excluding pre-production Broxton machines since commit 0102ba1f ("drm/i915: Add early BXT sdv to the list of preproduction machines"), now remove the list of workaround register values for those early machines. Signed-off-by:
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Chris Wilson authored
gem_workarounds reports that the SLICE_UNIT_LEVEL_CLKGATE write isn't sticking. Commit 0a60797a ("drm/i915: Implement ReadHitWriteOnlyDisable.") presumes that SLICE_UNIT_LEVEL_CLKGATE is a masked register in the context image, but commit 90007bca ("drm/i915/cnl: Introduce initial Cannonlake Workarounds.") lists it as an ordering unmasked register. The masked write will be losing the default settings if we trust the original commit. That gem_workarounds reports the value is lost entirely is more worrying though -- but it clearly suggests that it is not a masked register in the context image, so unify both w/a to use the original rmw. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103705 Fixes: 0a60797a ("drm/i915: Implement ReadHitWriteOnlyDisable.") References: 90007bca ("drm/i915/cnl: Introduce initial Cannonlake Workarounds.") Signed-off-by:
Rafael Antognolli <rafael.antognolli@intel.com>
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Lionel Landwerlin authored
ERROR: "__udivdi3" [drivers/gpu/drm/i915/i915.ko] undefined! ERROR: "__divdi3" [drivers/gpu/drm/i915/i915.ko] undefined! Store the frequency in kHz and drop 64bit divisions. v2: Use div64_u64 (Matthew) v3: store frequency in kHz to avoid 64bit divs (Chris/Ville) Fixes: dab91783 ("drm/i915: expose command stream timestamp frequency to userspace") Reported-by:
Matthew Auld <matthew.auld@intel.com> Signed-off-by:
Lionel Landwerlin <lionel.g.landwerlin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171113233455.12085-3-lionel.g.landwerlin@intel.comReviewed-by:
Ewelina Musial <ewelina.musial@intel.com> Signed-off-by:
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Mika Kahola authored
To make looping through transcoders in intel_ddi.c more generic, let's switch to use 'for_each_pipe()' macro to do this. v2: Add a notion that we are dealing with transcoders instead of pipes (Jani) Reviewed-by:
Mika Kahola <mika.kahola@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1510216670-16848-1-git-send-email-mika.kahola@intel.comSigned-off-by:
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James Ausmus authored
Since GLK, some plane configuration settings have moved to the PLANE_COLOR_CTL register. Refactor handling of the register to work like PLANE_CTL. This also allows us to fix the set/read of the plane Alpha Mode for GLK+. v2: Adjust ordering of platform checks to be newest->oldest, drop redundant comment about alpha blending. (Ville) v3: Move Alpha Mode bits out of skl_plane_ctl_format into skl_plane_ctl_alpha, and drop glk_plane_ctl_format, drop initialization of state->color_ctl on platforms that don't use it, and drop color_ctl local var. (Ville) v4: Consolidate skl_plane_ctl_format switch statement on formats that return the same settings. (Ville) Signed-off-by:
James Ausmus <james.ausmus@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
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Tina Zhang authored
GEM proxy is a kind of GEM, whose backing physical memory is pinned and produced by guest VM and is used by host as read only. With GEM proxy, host is able to access guest physical memory through GEM object interface. As GEM proxy is such a special kind of GEM, a new flag I915_GEM_OBJECT_IS_PROXY is introduced to ban host from changing the backing storage of GEM proxy. v3: - update "Reviewed-by". (Joonas) v2: - return -ENXIO when pin and map pages of GEM proxy to kernel space. (Chris) Here are the histories of this patch in "Dma-buf support for Gvt-g" patch-set: v14: - return -ENXIO when gem proxy object is banned by ioctl. (Chris) (Daniel) v13: - add comments to GEM proxy. (Chris) - don't ban GEM proxy in i915_gem_sw_finish_ioctl. (Chris) - check GEM proxy bar after finishing i915_gem_object_wait. (Chris) - remove GEM proxy bar in i915_gem_madvise_ioctl. v6: - add gem proxy barrier in the following ioctls. (Chris) i915_gem_set_caching_ioctl i915_gem_set_domain_ioctl i915_gem_sw_finish_ioctl i915_gem_set_tiling_ioctl i915_gem_madvise_ioctl Signed-off-by:
Tina Zhang <tina.zhang@intel.com> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> #v1 Reviewed-by:
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Tina Zhang authored
-ENXIO should be returned when operations are banned from changing backing storage of objects without backing storage. v4: - update "Reviewed-by". (Joonas) v3: - separate this patch from "Introduce GEM proxy" patch-set. (Joonas) v2: - update the patch description and subject to just mention objects w/o backing storage, instead of "GEM proxy". (Joonas) Signed-off-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by:
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Lucas De Marchi authored
Commit 78597996 (drm/i915/bxt: Fix PPS lost state after suspend breaking eDP link training) renamed the function to intel_power_sequencer_reset() but forgot to update comment. Cc: Imre Deak <imre.deak@intel.com> Signed-off-by:
Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by:
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Dave Airlie authored
Merge tag 'exynos-drm-next-for-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next - Improved HDMI and Mixer drivers . It moves mode setup and plane update code to commit like other CRTC drivers . It makes mode commit to be called in enable callback only one time . some cleanup and fixup to HDMI and Mixer drivers. . It adds 1024x768, 1280x1024 and 1366x768 modes support - Added HDMI audio interface driver . As of now, HDMI audio worked on boards with external audio codec connected in parallel with the HDMI audio transmitter's I2S interface. This patch is required to support HDMI audio properly. * tag 'exynos-drm-next-for-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos: drm: exynos: Add driver for HDMI audio interface drm/exynos/hdmi: add 85.5MHz pixel clock for v14 HDMI PHY drm/exynos/mixer: enable support for 1024x768 and 1280x1024 modes drm/exynos/hdmi: quirk for support mode timings conversion drm/exynos/mixer: pass actual mode on MIXER to encoder drm/exynos: add mode_fixup callback to exynos_drm_crtc_ops drm/exynos/hdmi: remove redundant mode field drm/exynos/mixer: remove mixer_resources sub-structure drm/exynos/mixer: fix mode validation code drm/exynos/mixer: move resolution configuration to single function drm/exynos/mixer: move mode commit to enable callback drm/exynos/mixer: abstract out output mode setup code
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- 13 Nov, 2017 17 commits
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git://people.freedesktop.org/~agd5f/linuxDave Airlie authored
This is a shared tree between drm and audio for some amd bits. * 'linus-4.14-rc4-acp-prereq' of git://people.freedesktop.org/~agd5f/linux: drm/amdgpu Moving amdgpu asic types to a separate file ASoC: AMD: Added asic_type as ACP DMA driver platform data drm/amd/amdgpu: Added asic_type as ACP DMA driver platform data
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git://anongit.freedesktop.org/drm/drm-miscDave Airlie authored
Driver Changes: - qxl: Use a shadow bo as primary and blit to it to fix flicker (Gerd) - rockchip: Convert psr spinlock to mutex (Emil) Cc: Emil Renner Berthing <kernel@esmil.dk> Cc: Gerd Hoffmann <kraxel@redhat.com> * tag 'drm-misc-fixes-2017-11-13' of git://anongit.freedesktop.org/drm/drm-misc: drm/rockchip: analogix_dp: Use mutex rather than spinlock
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Dave Airlie authored
Merge tag 'drm-intel-next-fixes-2017-11-10' of git://anongit.freedesktop.org/drm/drm-intel into drm-next drm/i915 fixes for v4.15 * tag 'drm-intel-next-fixes-2017-11-10' of git://anongit.freedesktop.org/drm/drm-intel: drm/i915: Reorder context-close to avoid calling i915_vma_close() under RCU drm/i915: Move init_clock_gating() back to where it was drm/i915: Prune the reservation shared fence array drm/i915: Idle the GPU before shinking everything drm/i915: Lock llist_del_first() vs llist_del_all() drm/i915: Calculate ironlake intermediate watermarks correctly, v2. drm/i915: Disable lazy PPGTT page table optimization for vGPU drm/i915/execlists: Remove the priority "optimisation" drm/i915: Filter out spurious execlists context-switch interrupts
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git://anongit.freedesktop.org/drm/drm-miscDave Airlie authored
Driver Changes: - qxl: Use a shadow bo as primary and blit to it to fix flicker (Gerd) * tag 'drm-misc-fixes-2017-11-02' of git://anongit.freedesktop.org/drm/drm-misc: qxl: alloc & use shadow for dumb buffers drm/qxl: replace QXL_INFO with DRM_DEBUG_DRIVER
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Michel Thierry authored
Until Haswell/Baytrail, the hardware used to have a per engine fault register (e.g. 0x4094 - render fault register, 0x4194 - media fault register and so on). But since Broadwell, all these registers were combined into a singe one and the engine id stored in bits 14:12. Not only we should not been reading (and writing to) registers that do not exist, in platforms with VCS2 (SKL), the address that would belong this engine (0x4494, VCS2_HW = 4) is already assigned to other register. v2: use less controversial function names (Chris). v3: make non-exported functions static, remove now obsolete check for engine presence before posting_read (Chris). References: IHD-OS-BDW-Vol 2c-11.15, page 75. References: IHD-OS-SKL-Vol 2c-05.16, page 350. Signed-off-by:
Michel Thierry <michel.thierry@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20171113173628.11689-1-michel.thierry@intel.comReviewed-by:
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Michel Thierry authored
From gen6, the hardware tracks address lookup failures and we should clear those registers upon startup to prevent false positives. However, this was happening before we have the engines defined (intel_uncore_init()) and the for_each_engine loop was just a nop. The earliest we can call this is inside intel_engines_init_mmio(). Suggested-by:
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Lionel Landwerlin authored
We use to have this fixed per generation, but starting with CNL userspace cannot tell just off the PCI ID. Let's make this information available. This is particularly useful for performance monitoring where much of the normalization work is done using those timestamps (this include pipeline statistics in both GL & Vulkan as well as OA reports). v2: Use variables for 24MHz/19.2MHz values (Ewelina) Renamed function & coding style (Sagar) v3: Fix frequency read on Broadwell (Sagar) Fix missing divide by 4 on <= gen4 (Sagar) Signed-off-by: -
Lionel Landwerlin authored
This adds new registers to the whitelist to configs emitted from userspace. Signed-off-by:
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Lionel Landwerlin authored
This name was added with the whitelisting of registers for building up OA configs. It is contained in a range gen8 whitelist : addr >= RPM_CONFIG0.reg && addr <= NOA_CONFIG(8).reg Hence why the name isn't used anywhere. v2: Fix register name again RPC->RCP (Matthew) Signed-off-by:
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Lionel Landwerlin authored
Gen8/9 aren't very different and we can merge some of this code. Signed-off-by:
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Lionel Landwerlin authored
We can enable GT3 as well as GT2. Signed-off-by:
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Lionel Landwerlin authored
We were missing some registers and also can name one for which we only had the offset. Signed-off-by:
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Maarten Lankhorst authored
Lock the bare minimum, instead of the entire world, and use interruptible locking because we can. Signed-off-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171110113503.16253-6-maarten.lankhorst@linux.intel.comReviewed-by:
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Maarten Lankhorst authored
Some parameters use CHECK_BOOL, but should really use CHECK_BOOL_INCOMPLETE. We cannot currently check whether the inherited infoframes and audio are set up correctly. Signed-off-by:
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Maarten Lankhorst authored
Add PIPE_CONF_CHECK_BOOL for boolean options, which are printed with yesno. Signed-off-by:
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Maarten Lankhorst authored
The flag just tells us IPS can be enabled, if the primary plane is not enabled it means IPS might not be. This never triggered in CI because we don't have a haswell ULT there, but can be reproduced easily with kms_atomic_transitions.plane-all-modeset-transition Signed-off-by:
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Emil Renner Berthing authored
On the Samsung Chromebook Plus I get this error with 4.14-rc3: BUG: scheduling while atomic: kworker/3:1/50/0x00000002 Modules linked in: CPU: 3 PID: 50 Comm: kworker/3:1 Not tainted 4.14.0-0.rc3-kevin #2 Hardware name: Google Kevin (DT) Workqueue: events analogix_dp_psr_work Call trace: [<ffffff80080873b0>] dump_backtrace+0x0/0x320 [<ffffff80080876e4>] show_stack+0x14/0x20 [<ffffff8008606d38>] dump_stack+0x9c/0xbc [<ffffff80080c6b5c>] __schedule_bug+0x4c/0x70 [<ffffff80086188c0>] __schedule+0x3f0/0x458 [<ffffff8008618960>] schedule+0x38/0xa0 [<ffffff800861c20c>] schedule_hrtimeout_range_clock+0x84/0xe8 [<ffffff800861c2a0>] schedule_hrtimeout_range+0x10/0x18 [<ffffff800861bcec>] usleep_range+0x64/0x78 [<ffffff8008415a6c>] analogix_dp_transfer+0x16c/0x340 [<ffffff8008412550>] analogix_dpaux_transfer+0x10/0x18 [<ffffff80083ceb14>] drm_dp_dpcd_access+0x4c/0xf0 [<ffffff80083cf614>] drm_dp_dpcd_write+0x1c/0x28 [<ffffff8008413b98>] analogix_dp_disable_psr+0x60/0xa8 [<ffffff800840da3c>] analogix_dp_psr_work+0x4c/0x90 [<ffffff80080bb09c>] process_one_work+0x1d4/0x348 [<ffffff80080bb258>] worker_thread+0x48/0x478 [<ffffff80080c11fc>] kthread+0x12c/0x130 [<ffffff8008084290>] ret_from_fork+0x10/0x18 Changing rockchip_dp_device::psr_lock to a mutex rather than spinlock seems to fix the issue. Signed-off-by:
Emil Renner Berthing <kernel@esmil.dk> Tested-by:
Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by:
Mark Yao <mark.yao@rock-chips.com> Link: https://patchwork.freedesktop.org/patch/msgid/20171004175346.11956-1-kernel@esmil.dk
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- 12 Nov, 2017 2 commits
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Oscar Mateo authored
GEN8_CONFIG0 (0xD00) is a protected by a lock (bit 31) which is set by the BIOS, so there is no way we can enable the three chicken bits mandated by the WA (the BIOS should be doing it instead). v2: Rebased v3: Standalone patch References: b033bb6d ("drm/i915/gen9: Enable must set chicken bits in config0 reg") Signed-off-by:
Oscar Mateo <oscar.mateo@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1510185589-9100-2-git-send-email-oscar.mateo@intel.comReviewed-by:
Mika Kuoppala <mika.kuoppala@linux.intel.com> Signed-off-by:
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Chris Wilson authored
Now that we always execute a context switch upon module load, there is no need to queue a delayed task for doing so. The purpose of the delayed task is to enable GT powersaving, for which we need the HW state to be valid (i.e. having loaded a context and initialised basic state). We used to defer this operation as historically it was slow (due to slow register polling, fixed with commit 1758b90e ("drm/i915: Use a hybrid scheme for fast register waits")) but now we have a requirement to save the default HW state. v2: Load the kernel context (to provide the power context) upon resume. Signed-off-by:
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- 11 Nov, 2017 1 commit
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Maarten Lankhorst authored
We no longer use intel_crtc->wm.active for watermarks any more, which was incorrect. But this uncovered a bug in sanitize_watermarks(), which meant that we wrote the correct watermarks, but the next update would still use the wrong hw watermarks for calculating. This caused all further updates to fail with -EINVAL and the log would reveal an error like the one below: [ 10.043902] [drm:ilk_validate_wm_level.part.8 [i915]] Sprite WM0 too large 56 (max 0) [ 10.043960] [drm:ilk_validate_pipe_wm [i915]] LP0 watermark invalid [ 10.044030] [drm:intel_crtc_atomic_check [i915]] No valid intermediate pipe watermarks are possible Signed-off-by:
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- 10 Nov, 2017 1 commit
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Chris Wilson authored
Move all of the i915->mm initialisation to a private function that can be reused by the mock i915 device to save forgetting any more steps. For example, <7>[ 1542.046332] [IGT] drv_selftest: starting subtest mock_objects <4>[ 1542.123924] Setting dangerous option mock_selftests - tainting kernel <6>[ 1542.167941] i915: Performing mock selftests with st_random_seed=0x246f5ab5 st_timeout=1000 <4>[ 1542.178012] INFO: trying to register non-static key. <4>[ 1542.178027] the code is fine but needs lockdep annotation. <4>[ 1542.178032] turning off the locking correctness validator. <4>[ 1542.178041] CPU: 3 PID: 6008 Comm: kworker/3:7 Tainted: G U 4.14.0-rc8-CI-CI_DRM_3332+ #1 <4>[ 1542.178049] Hardware name: /NUC6CAYB, BIOS AYAPLCEL.86A.0040.2017.0619.1722 06/19/2017 <4>[ 1542.178144] Workqueue: events __i915_gem_free_work [i915] <4>[ 1542.178152] Call Trace: <4>[ 1542.178163] dump_stack+0x68/0x9f <4>[ 1542.178170] register_lock_class+0x3fd/0x580 <4>[ 1542.178177] ? unwind_next_frame+0x14/0x20 <4>[ 1542.178184] ? __save_stack_trace+0x73/0xd0 <4>[ 1542.178191] __lock_acquire+0xa4/0x1b00 <4>[ 1542.178254] ? __i915_gem_free_work+0x28/0xa0 [i915] <4>[ 1542.178261] ? __lock_acquire+0x4ab/0x1b00 <4>[ 1542.178268] lock_acquire+0xb0/0x200 <4>[ 1542.178273] ? lock_acquire+0xb0/0x200 <4>[ 1542.178336] ? __i915_gem_free_work+0x28/0xa0 [i915] <4>[ 1542.178344] _raw_spin_lock+0x32/0x50 <4>[ 1542.178405] ? __i915_gem_free_work+0x28/0xa0 [i915] <4>[ 1542.178468] __i915_gem_free_work+0x28/0xa0 [i915] <4>[ 1542.178476] process_one_work+0x221/0x650 <4>[ 1542.178483] worker_thread+0x4e/0x3c0 <4>[ 1542.178489] kthread+0x114/0x150 <4>[ 1542.178494] ? process_one_work+0x650/0x650 <4>[ 1542.178499] ? kthread_create_on_node+0x40/0x40 <4>[ 1542.178506] ret_from_fork+0x27/0x40 v2: Fish out i915->mm.object_stat_lock which was being inited over in i915_drv.c (Matthew) Signed-off-by:
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