- 21 Jun, 2016 10 commits
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Maarten Lankhorst authored
DPMS is unreliable, use crtc->state. Signed-off-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1466431059-8919-4-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by:
Ville Syrjälä <ville.syrjala@linux.intel.com>
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Maarten Lankhorst authored
This removes relying on intel_encoder->type, which may be set to unknown. Signed-off-by:
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Chris Wilson authored
If we update the value of i915.enable_gvt should we fail to load GVT, userspace can easily detect when it fails to load as requested. Testcase: igt/gvt_basic Signed-off-by:
Chris Wilson <chris@chris-wilson.co.uk> Cc: Zhi Wang <zhi.a.wang@intel.com> Reviewed-by:
Zhi Wang <zhi.a.wang@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1466507234-23242-1-git-send-email-chris@chris-wilson.co.uk
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Zhi Wang authored
The access right of kernel param "i915.enable_gvt" should be read-only as it only applies during module load (and is not *runtime* writable). Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by:
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Michał Winiarski authored
If the GPU load is low enough, it's possible that we'll be stuck at idle frequency rather than transition into softmin frequency requested by userspace. v2: Use intel_set_rps, drop vlv_set_idle v3: Back to vlv_set_idle, clamp to valid range v4: Place intel_set_rps at the end References: https://bugs.freedesktop.org/show_bug.cgi?id=89728 Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Imre Deak <imre.deak@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Michał Winiarski <michal.winiarski@intel.com> Signed-off-by:
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Dave Gordon authored
The ONLY places that guc_id (aka hw_id) should be used are those where the value or address is determined by and shared with the GuC firmware; specifically, when filling in the GuC-context-descriptor or the GuC addon data, or putting an entry in the GuC's work queue. It need not (and therefore should not) be used to index GuC statistics or similar host-managed tracking data. In particular, i915_guc_submit() produces (and debugfs decodes) GuC submission statistics which should be indexed by driver-engine-id rather then guc-engine-id. Signed-off-by:
Dave Gordon <david.s.gordon@intel.com> Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1466432287-5799-1-git-send-email-david.s.gordon@intel.com
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Chris Wilson authored
During lastclose, we call intel_fbdev_restore_mode() to switch back to the fbcon configuration on return to VT. However, if we have not yet finished the asynchronous fbdev initialisation, the current mode will be invalid and trigger WARNs upon application. Serialise with the outstanding initialisation if the first application exits quickly. Note that to hit this in practice requires using an unregistered async_domain as otherwise modprobe will force a full synchronisation prior to init() completing. v2: Reuse comment explaining the +1 by refactoring the wait on fbdev sync in the previous patch. Reported-by:
Gustav Fägerlind <gustav.fagerlind@gmail.com> Reported-by:
"Li, Weinan Z" <weinan.z.li@intel.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93580Signed-off-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1466497015-8509-3-git-send-email-chris@chris-wilson.co.uk
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Chris Wilson authored
During cleanup we have to synchronise with the async task we are using to initialise and register our fbdev. Currently, we are using a full synchronisation on the global domain, but we can restrict this to just synchronising up to our task if we remember our cookie. Whilst there, streamline the function parameters. v2: async_synchronize_cookie() takes an exclusive upper bound, to synchronize with our task we have to pass in the next cookie. v3: Drop premature disregarding of the active cookie (we need to wait until the task is complete before continuing in the teardown). v4: Refactor waiting on async to incorporate a comment explaining why we need the +1. Signed-off-by:
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Chris Wilson authored
Setting up fbdev requires everything ready and registered (in particular the connectors). In the forthcoming patches, we defer registration of the KMS objects and unless we defer setting off fbdev, it may run before they are registered and oops. Signed-off-by:
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- 20 Jun, 2016 7 commits
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Chris Wilson authored
... instead of the previous ORIGIN_GTT. This should actually invalidate FBC once something is written on the frontbuffer using WC mmaps. The problem with ORIGIN_GTT is that the automatic hardware tracking is not able to detect the WC writes as it can detect the GTT writes. This should help fix the SKL bug where nothing happens when you type your username/password on lightdm. This patch was originally pasted on an email by Chris and converted to an actual git patch by Paulo. v2 (from Paulo): - Make it a full variable instead of a bit-field (Daniel) - Use WRITE_ONCE (Chris) v3 (from Paulo): - Remove huge comment since now we have WRITE_ONCE (Chris) - Remove uneeded new line (Chris) - Add Chris' Signed-off-by, authorized via IRC Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Paulo Zanoni <paulo.r.zanoni@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1466185599-26401-1-git-send-email-paulo.r.zanoni@intel.com
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Paulo Zanoni authored
The DDX driver changes its behavior depending on the value it reads from i915.enable_fbc, so sanitize the value in order to allow it to know what's going on. It uses this in order to choose the defaults for the TearFree option. Before this patch, it would read -1 and always assume that FBC was disabled, so it wouldn't force TearFree. v2: Extract intel_sanitize_fbc_option() (Chris). v3: Rebase. Signed-off-by:
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Paulo Zanoni authored
We ignore ORIGIN_GTT because the hardware tracking can recognize GTT writes and take care of them. We also ignore ORIGIN_FLIP because we deal with flips without relying on the frontbuffer tracking infrastructure. On the other hand, a flush is a flush and means we're good to go, so we need to update busy_bits in order to reflect that, even if we're not going to do anything else about it. How to reproduce the bug fixed by this patch: - boot SKL up to the desktop environment - stop the display manager - run any of the igt/kms_frontbuffer_tracking/*fbc*onoff* subtests - the tests will fail The steps above will create the right conditions for us to lose track of busy_bits. If you, for example, run the full set of FBC tests, the onoff subtests will succeed. Also notice that the "bug" is that we'll just keep FBC disabled on cases where it could be enabled, so it's not something the users can perceive, it just affects power consumption numbers on properly configured machines. Testcase: igt/kms_frontbuffer_tracking/*fbc*onoff* (see above) Reviewed-by:
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Lyude authored
>From https://bugs.freedesktop.org/show_bug.cgi?id=96461 : This was kind of a difficult bug to track down. If you're using a Haswell system running GNOME and you have fbc completely enabled and working, playing videos can result in video artifacts. Steps to reproduce: - Run GNOME - Ensure FBC is enabled and active - Download a movie, I used the ogg version of Big Buck Bunny for this - Run `gst-launch-1.0 filesrc location='some_movie.ogg' ! decodebin ! glimagesink` in a terminal - Watch for about over a minute, you'll see small horizontal lines go down the screen. For the time being, disable FBC for Haswell by default. Stefan Richter reported kernel freezes (no video artifacts) when fbc is on. (E3-1245 v3 with HD P4600; openbox and some KDE and LXDE applications, thread begins at https://lkml.org/lkml/2016/4/26/813). We also got reports from Steven Honeyman on openbox+roxterm. v2 (From Paulo): - Add extra information to the commit message - Add Fixes tag - Rebase Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96461 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=96464 Fixes: a98ee793 ("drm/i915/fbc: enable FBC by default on HSW and BDW") Cc: stable@vger.kernel.org Reviewed-by:
Lyude <cpaul@redhat.com> Signed-off-by:
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Chris Wilson authored
The idea behind relaxing the restriction for pread/pwrite was to handle !obj->base.flip, i.e. non-shmemfs backed objects, which only requires that the object provide struct pages. v2: Remove excess (). Note enough editing after copy'n'paste. v3: Use new i915_gem_object_has_struct_page() Testcase: igt/prime_vgem/read Signed-off-by:
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Chris Wilson authored
Currently to see if an object is backed by struct pages (as opposed to being a simple pointer to stolen memory, for example) we do a manual check on the obj->ops->flags. This is quite shouty and before adding more checks in future, we should make it a bit calmer. Signed-off-by:
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Mika Kahola authored
It has been found out that in some HW combination the DisplayPort fast link training feature caused screen flickering. Let's revert this feature for now until we can ensure that the feature works for all platforms. This is a manual revert of commits 5fa836a9 ("drm/i915: DP link training optimization") and 4e96c977 ("drm/i915: eDP link training optimization"). Fixes: 5fa836a9 ("drm/i915: DP link training optimization") Fixes: 4e96c977 ("drm/i915: eDP link training optimization") Cc: <stable@vger.kernel.org> # v4.2+ Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91393Reviewed-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
Mika Kahola <mika.kahola@intel.com> Signed-off-by:
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- 19 Jun, 2016 1 commit
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Daniel Vetter authored
Signed-off-by:
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- 17 Jun, 2016 10 commits
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Zhi Wang authored
GVT workload scheduler needs special host LRC contexts, the so called "shadow LRC context" to submit guest workload to host i915. During the guest workload submission, workload scheduler fills the shadow LRC context with the content of guest LRC context: engine context is copied without changes, ring context is mostly owned by host i915. v8: - Remove the graph temporarily. (Chris) - Use interruptible mutex_lock. (Chris) - Rename the function name of creating a GVT context. (Chris) - Add the missing declaration in i915_drv.h (Chris) v7: - Move chart to a better place. (Joonas) v6: - Make GVT code as dead code when !CONFIG_DRM_I915_GVT. (Chris) v5: - Only compile this feature when CONFIG_DRM_I915_GVT is enabled. (Tvrtko) - Rebase the code into new repo. - Add a comment about the ring buffer size. (Joonas) v2: Mostly based on Daniel's idea. Call the refactored core logic of GEM context creation service and LRC context creation service to create the GVT context. Reviewed-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Signed-off-by:
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Zhi Wang authored
This patch introduces the support of LRC context single submission. As GVT context may come from different guests, which require different configuration of render registers. It can't be combined into a dual ELSP submission combo. Only GVT-g will create this kinds of GEM context currently. v8: - Rename the data member in struct i915_gem_context. (Chris) v7: - Fix typos in commit message. (Joonas) v6: - Make GVT code as dead code when !CONFIG_DRM_I915_GVT. (Chris) v5: - Only compile this feature when CONFIG_DRM_I915_GVT=y. (Tvrtko) Reviewed-by:
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Zhi Wang authored
This patch introduces an approach to track the execlist context status change. GVT-g uses GVT context as the "shadow context". The content inside GVT context will be copied back to guest after the context is idle. And GVT-g has to know the status of the execlist context. This function is configurable when creating a new GEM context. Currently, Only GVT-g will create the "status-change-notification" enabled GEM context. v10: - Fix the identation. (Joonas) v8: - Remove the boolean flag in struct i915_gem_context. (Joonas) v7: - Remove per-engine ctx status notifiers. Use one status notifier for all engines. (Joonas) - Add prefix "INTEL_" for related definitions. (Joonas) - Refine the comments in execlists_context_status_change(). (Joonas) v6: - When !CONFIG_DRM_I915_GVT, make GVT code as dead code then compiler could automatically eliminate them for us. (Chris) - Always initialize the notifier header, so it could be switched on/off at runtime. (Chris) v5: - Only compile this feature when CONFIG_DRM_I915_GVT is enabled.(Tvrtko) Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> (v8) Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Signed-off-by:
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Zhi Wang authored
Currently the addressing mode bit in context descriptor is statically generated from the configuration of system-wide PPGTT usage model. GVT-g will load the PPGTT shadow page table by itself and probably one guest is using a different addressing mode with i915 host. The addressing mode bits of a LRC context should be configurable under this case. v10: - Fix the identation. (Joonas) v9: - Rename the data member in struct i915_gem_context. (Chris) v8: - Rename the data member in struct i915_gem_context. (Chris) v7: - Move context addressing mode bit into i915_reg.h. (Joonas/Chris) - Add prefix "INTEL_" for related definitions. (Joonas) v6: - Directly save the addressing mode bits inside i915_gem_context. (Chris) - Move the LRC context addressing mode bits into intel_lrc.h. (Chris) v5: - Change USES_FULL_48BIT(dev) to USES_FULL_48BIT(dev_priv) (Tvrtko) Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> (v9) Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Signed-off-by:
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Zhi Wang authored
This patch introduces an option for configuring the ring buffer size of a LRC context after the context creation. v9: - Fix an identation issue. (Chris) v8: - Rename the data member in i915_gem_context. (Chris) Reviewed-by:
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Zhi Wang authored
This patch introduces the very basic framework of GVT-g device model, includes basic prototypes, definitions, initialization. v12: - Call intel_gvt_init() in driver early initialization stage. (Chris) v8: - Remove the GVT idr and mutex in intel_gvt_host. (Joonas) v7: - Refine the URL link in Kconfig. (Joonas) - Refine the introduction of GVT-g host support in Kconfig. (Joonas) - Remove the macro GVT_ALIGN(), use round_down() instead. (Joonas) - Make "struct intel_gvt" a data member in struct drm_i915_private.(Joonas) - Remove {alloc, free}_gvt_device() - Rename intel_gvt_{create, destroy}_gvt_device() - Expost intel_gvt_init_host() - Remove the dummy "struct intel_gvt" declaration in intel_gvt.h (Joonas) v6: - Refine introduction in Kconfig. (Chris) - The exposed API functions will take struct intel_gvt * instead of void *. (Chris/Tvrtko) - Remove most memebers of strct intel_gvt_device_info. Will add them in the device model patches.(Chris) - Remove gvt_info() and gvt_err() in debug.h. (Chris) - Move GVT kernel parameter into i915_params. (Chris) - Remove include/drm/i915_gvt.h, as GVT-g will be built within i915. - Remove the redundant struct i915_gvt *, as the functions in i915 will directly take struct intel_gvt *. - Add more comments for reviewer. v5: Take Tvrtko's comments: - Fix the misspelled words in Kconfig - Let functions take drm_i915_private * instead of struct drm_device * - Remove redundant prints/local varible initialization v3: Take Joonas' comments: - Change file name i915_gvt.* to intel_gvt.* - Move GVT kernel parameter into intel_gvt.c - Remove redundant debug macros - Change error handling style - Add introductions for some stub functions - Introduce drm/i915_gvt.h. Take Kevin's comments: - Move GVT-g host/guest check into intel_vgt_balloon in i915_gem_gtt.c v2: - Introduce i915_gvt.c. It's necessary to introduce the stubs between i915 driver and GVT-g host, as GVT-g components is configurable in kernel config. When disabled, the stubs here do nothing. Take Joonas' comments: - Replace boolean return value with int. - Replace customized info/warn/debug macros with DRM macros. - Document all non-static functions like i915. - Remove empty and unused functions. - Replace magic number with marcos. - Set GVT-g in kernel config to "n" by default. Reviewed-by: -
Zhi Wang authored
v5: - Let functions take struct drm_i915_private *. (Tvrtko) - Fold vGPU related active check into the inner functions. (Kevin) Reviewed-by:
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Reviewed-by:
Kevin Tian <kevin.tian@intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Kevin Tian <kevin.tian@intel.com> Signed-off-by:
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Zhi Wang authored
To get the offset of the members in PVINFO page, offsetof() looks much better than the tricky approach in current code. v7: - Move "offsetof()" modification into a dedicated patch. (Joonas) Suggested-by:
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Zhi Wang authored
As the PVINFO page definition is used by both GVT-g guest (vGPU) and GVT-g host (GVT-g kernel device model), factor it out for better code structure. v7: - Split the "offsetof" modification into a dedicated patch. (Joonas) v3: - Use offsetof to calculate the member offset of PVINFO structure (Joonas) Reviewed-by:
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Chris Wilson authored
obj->base.dma_buf represents a dma-buf exported from this object (for use by others). On the contrary, obj->base.import_attach represents the source dma-buf that was used to create this object (if any). When serialising with third parties, we need to wait on their rendering via the import attachment as well as their rendering on our exported dma-buf. v2: Wait on both import and export. v3: Rebase Signed-off-by:
Alex Goins <agoins@nvidia.com> Reviewed-by:
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- 16 Jun, 2016 7 commits
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Daniel Vetter authored
Note that I didn't start garbage collecting all the legacy flip code yet, to make it easier to revert this. But there will be _lots_ of code that can be removed once this is tested on all platforms. v2: Use __maybe_unused (Maarten). Reviewed-by:
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Daniel Vetter authored
Currently it's part of prepare_fb, still in the first phase of atomic_commit which might fail. Which means that we need to have some heuristics in cleanup_fb to figure out whether things failed, or whether we just clean up the old fbs. That's fragile, and worse, once we start pipelining commits gets confused: While the last commit is still getting cleanup up we already hammer in the new one, and fb_bits aren't refcounted, resulting in lost bits and WARN_ON galore. We could instead try to make cleanup_fb more clever, but a simpler fix is to postpone the fb_bits tracking past the point of no return, where we commit all the software state. That also makes conceptually more sense, since fb_bits must be updated synchronously from the ioctl (they track usage from userspace pov, not from the hw pov), right before we're fully committed to the updated. This fixes WARNING splats from track_fb with page_flip implemented through atomic_commit. Testcase: igt/kms_flip/flip-vs-rmfb Reviewed-by:
Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1465827229-1704-4-git-send-email-daniel.vetter@ffwll.ch
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Daniel Vetter authored
Simply split intel_atomic_commit in half and place the new nonblocking commit helpers at the right spots. NOTE: There's still trouble with obj->frontbuffer bits getting mangled when pipelining atomic commits. v2: - Remove the check for nonblocking which returned -EINVAL. - Do wait for requests in the worker thread before committing hw state. v3: Move hw_done after the optimize_wm/post_plane_update step, plus add FIXME comment how to fix that up again properly. v4: Update FIXME for intel_atomic_commit - more stuff works now. v5: Still reject nonblocking modeset commits (Maarten). v6: Use intel_state->modeset (Maarten). Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by:
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Maarten Lankhorst authored
The patch was reverted as part of the original nonblocking commit support, but is required for any kind of nonblocking commit. This is required to let fbc updates run async. It has a lot of checks whether certain locks are taken, which can be removed when the relevant states are passed in as pointers. Signed-off-by:
Patrik Jakobsson <patrik.jakobsson@linux.intel.com> Signed-off-by:
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Daniel Vetter authored
Right now still all blocking, no worker anywhere to be seen. Reviewed-by:
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Daniel Vetter authored
This is part of what atomic must implement. And it's also required to be able to use the helper nonblocking support. v2: Always send out the drm event, remove the planes_changed check. Reviewed-by:
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Daniel Vetter authored
Backmerge drm-next to get at the nonblocking atomic helpers, needed to merge the i915 conversion. Signed-off-by:
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- 15 Jun, 2016 4 commits
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git://anongit.freedesktop.org/drm-intelDave Airlie authored
- best_encoder cleanup from Boris. - drm_simple_display_pipe helpers from Noralf. Looks really neat imo, and there's 2-3 in-flight drivers which look like they could/should use it. Anyway, with this we have now helpers and everything in place to write drivers for simple hw with fewer complexity in the driver than what fbdev would need. That was the last complaint I've heard from embedded folks after we made atomic happen. Mission accomplished! - nonblocking commit helpers for atomic, plus a bunch of driver patches for that. - Prep patch from Laurent for cleaned up pixel format functions. - More of Gustavo's cleanup for drm vblank functions. - and a few oddball things in between Plus the merge of docs-next to prep the docbook->sphinx conversion as discussed. Jon cc'ed as fyi. * tag 'topic/drm-misc-2016-06-15' of git://anongit.freedesktop.org/drm-intel: (108 commits) drm/atomic-helpers: Clear up cleanup_done a bit drm/atomic-helpers: Stall on the right commit drm/vmwgfx: use *_32_bits() macros drm/virtio: Don't reinvent a flipping wheel drm/i915: Fix missing unlock on error in i915_ppgtt_info() drm/gma500: use drm_crtc_vblank_{on,off}() drm/radeon: use crtc directly in drm_crtc_vblank_put() drm/amdgpu: use crtc directly in drm_crtc_vblank_put() drm/radeon: use drm_crtc_vblank_{on,off}() drm/amdgpu: use drm_crtc_vblank_{on,off}() drm: make drm_vblank_{get,put}() static drm: remove legacy drm_arm_vblank_event() drm: remove legacy drm_send_vblank_event() drm/nouveau: replace legacy vblank helpers drm/prime: fix error path deadlock fail drm/dsi: Add uevent callback drm: fb: cma: fix memory leak drm: i915: Rely on the default ->best_encoder() behavior where appropriate drm: Add helper for simple display pipeline drm/bridge: dw-hdmi: Use drm_atomic_helper_best_encoder() ...
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Daniel Vetter authored
It's not obvious at first sight that this is a fastpath, make that clearer with a goto. Fallout from a discussion with Liviu on irc. v2: Drop bogus hunks that crept in. v3: Make it compile. Cc: Liviu.Dudau@arm.com Acked-by: Liviu.Dudau@arm.com Signed-off-by:
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Daniel Vetter authored
stall_checks carefully picked out the right commit to stall on, then promptly used the wrong variable. Due to the break in the next loop iteration this could be the 3rd commit, or if the list only has 2 entries commit would now point into the struct drm_crtc itself, at some offset. Hilarity eventually ensues. For added safety, also break right away instead of iterating once more, but the real fix is waiting on stall_commit instead of commit. Reported-and-tested-by:
Liviu Dudau <Liviu.Dudau@arm.com> Cc: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by:
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Paul Bolle authored
Use the upper_32_bits() macro instead of the four line equivalent that triggers a GCC warning on 32 bits x86: drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c: In function 'vmw_cmdbuf_header_submit': drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c:297:25: warning: right shift count >= width of type [-Wshift-count-overflow] val = (header->handle >> 32); ^ And use the lower_32_bits() macro instead of and-ing with a 32 bits mask. Signed-off-by:Paul Bolle <pebolle@tiscali.nl> Acked-by:
Joe Perches <joe@perches.com> Signed-off-by:
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- 14 Jun, 2016 1 commit
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Lyude authored
Thanks to Ville Syrjälä for pointing me towards the cause of this issue. Unfortunately one of the sideaffects of having the refclk for a DPLL set to SSC is that as long as it's set to SSC, the GPU will prevent us from powering down any of the pipes or transcoders using it. A couple of BIOSes enable SSC in both PCH_DREF_CONTROL and in the DPLL configurations. This causes issues on the first modeset, since we don't expect SSC to be left on and as a result, can't successfully power down the pipes or the transcoders using it. Here's an example from this Dell OptiPlex 990: [drm:intel_modeset_init] SSC enabled by BIOS, overriding VBT which says disabled [drm:intel_modeset_init] 2 display pipes available. [drm:intel_update_cdclk] Current CD clock rate: 400000 kHz [drm:intel_update_max_cdclk] Max CD clock rate: 400000 kHz [drm:intel_update_max_cdclk] Max dotclock rate: 360000 kHz vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem [drm:intel_crt_reset] crt adpa set to 0xf40000 [drm:intel_dp_init_connector] Adding DP connector on port C [drm:intel_dp_aux_init] registering DPDDC-C bus for card0-DP-1 [drm:ironlake_init_pch_refclk] has_panel 0 has_lvds 0 has_ck505 0 [drm:ironlake_init_pch_refclk] Disabling SSC entirely … later we try committing the first modeset … [drm:intel_dump_pipe_config] [CRTC:26][modeset] config ffff88041b02e800 for pipe A [drm:intel_dump_pipe_config] cpu_transcoder: A … [drm:intel_dump_pipe_config] dpll_hw_state: dpll: 0xc4016001, dpll_md: 0x0, fp0: 0x20e08, fp1: 0x30d07 [drm:intel_dump_pipe_config] planes on this crtc [drm:intel_dump_pipe_config] STANDARD PLANE:23 plane: 0.0 idx: 0 enabled [drm:intel_dump_pipe_config] FB:42, fb = 800x600 format = 0x34325258 [drm:intel_dump_pipe_config] scaler:0 src (0, 0) 800x600 dst (0, 0) 800x600 [drm:intel_dump_pipe_config] CURSOR PLANE:25 plane: 0.1 idx: 1 disabled, scaler_id = 0 [drm:intel_dump_pipe_config] STANDARD PLANE:27 plane: 0.1 idx: 2 disabled, scaler_id = 0 [drm:intel_get_shared_dpll] CRTC:26 allocated PCH DPLL A [drm:intel_get_shared_dpll] using PCH DPLL A for pipe A [drm:ilk_audio_codec_disable] Disable audio codec on port C, pipe A [drm:intel_disable_pipe] disabling pipe A ------------[ cut here ]------------ WARNING: CPU: 1 PID: 130 at drivers/gpu/drm/i915/intel_display.c:1146 intel_disable_pipe+0x297/0x2d0 [i915] pipe_off wait timed out … ---[ end trace 94fc8aa03ae139e8 ]--- [drm:intel_dp_link_down] [drm:ironlake_crtc_disable [i915]] *ERROR* failed to disable transcoder A Later modesets succeed since they reset the DPLL's configuration anyway, but this is enough to get stuck with a big fat warning in dmesg. A better solution would be to add refcounts for the SSC source, but for now leaving the source clock on should suffice. Changes since v4: - Fix calculation of final for systems with LVDS panels (fixes BUG() on CI test suite) Changes since v3: - Move temp variable into loop - Move checks for using_ssc_source to after we've figured out has_ck505 - Add using_ssc_source to debug output Changes since v2: - Fix debug output for when we disable the CPU source Changes since v1: - Leave the SSC source clock on instead of just shutting it off on all of the DPLL configurations. Cc: stable@vger.kernel.org Reviewed-by:
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