When we write watermark values to the hardware, those values are stored
in dev_priv->wm.skl_hw. However with recent watermark changes, the
results structure we're copying from only contains valid watermark and
DDB values for the pipes that are actually changing; the values for
other pipes remain 0. Thus a blind copy of the entire skl_wm_values
structure will clobber the values for unchanged pipes...we need to be
more selective and only copy over the values for the changing pipes.
This mistake was hidden until recently due to another bug that caused us
to erroneously re-calculate watermarks for all active pipes rather than
changing pipes. Only when that bug was fixed was the impact of this bug
discovered (e.g., modesets failing with "Requested display configuration
exceeds system watermark limitations" messages and leaving watermarks
non-functional, even ones initiated by intel_fbdev_restore_mode).
Changes since v1:
- Add a function for copying a pipe's wm values
(skl_copy_wm_for_pipe()) so we can reuse this later
Fixes: 734fa01f3a ("drm/i915/gen9: Calculate watermarks during atomic 'check' (v2)")
Fixes: 9b61302274 ("drm/i915/gen9: Re-allocate DDB only for changed pipes")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Lyude <cpaul@redhat.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Cc: stable@vger.kernel.org
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1471463761-26796-4-git-send-email-cpaul@redhat.com
(cherry picked from commit 2722efb90b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Since the watermark calculations for Skylake are still broken, we're apt
to hitting underruns very easily under multi-monitor configurations.
While it would be lovely if this was fixed, it's not. Another problem
that's been coming from this however, is the mysterious issue of
underruns causing full system hangs. An easy way to reproduce this with
a skylake system:
- Get a laptop with a skylake GPU, and hook up two external monitors to
it
- Move the cursor from the built-in LCD to one of the external displays
as quickly as you can
- You'll get a few pipe underruns, and eventually the entire system will
just freeze.
After doing a lot of investigation and reading through the bspec, I
found the existence of the SAGV, which is responsible for adjusting the
system agent voltage and clock frequencies depending on how much power
we need. According to the bspec:
"The display engine access to system memory is blocked during the
adjustment time. SAGV defaults to enabled. Software must use the
GT-driver pcode mailbox to disable SAGV when the display engine is not
able to tolerate the blocking time."
The rest of the bspec goes on to explain that software can simply leave
the SAGV enabled, and disable it when we use interlaced pipes/have more
then one pipe active.
Sure enough, with this patchset the system hangs resulting from pipe
underruns on Skylake have completely vanished on my T460s. Additionally,
the bspec mentions turning off the SAGV with more then one pipe enabled
as a workaround for display underruns. While this patch doesn't entirely
fix that, it looks like it does improve the situation a little bit so
it's likely this is going to be required to make watermarks on Skylake
fully functional.
This will still need additional work in the future: we shouldn't be
enabling the SAGV if any of the currently enabled planes can't enable WM
levels that introduce latencies >= 30 µs.
Changes since v11:
- Add skl_can_enable_sagv()
- Make sure we don't enable SAGV when not all planes can enable
watermarks >= the SAGV engine block time. I was originally going to
save this for later, but I recently managed to run into a machine
that was having problems with a single pipe configuration + SAGV.
- Make comparisons to I915_SKL_SAGV_NOT_CONTROLLED explicit
- Change I915_SAGV_DYNAMIC_FREQ to I915_SAGV_ENABLE
- Move printks outside of mutexes
- Don't print error messages twice
Changes since v10:
- Apparently sandybridge_pcode_read actually writes values and reads
them back, despite it's misleading function name. This means we've
been doing this mostly wrong and have been writing garbage to the
SAGV control. Because of this, we no longer attempt to read the SAGV
status during initialization (since there are no helpers for this).
- mlankhorst noticed that this patch was breaking on some very early
pre-release Skylake machines, which apparently don't allow you to
disable the SAGV. To prevent machines from failing tests due to SAGV
errors, if the first time we try to control the SAGV results in the
mailbox indicating an invalid command, we just disable future attempts
to control the SAGV state by setting dev_priv->skl_sagv_status to
I915_SKL_SAGV_NOT_CONTROLLED and make a note of it in dmesg.
- Move mutex_unlock() a little higher in skl_enable_sagv(). This
doesn't actually fix anything, but lets us release the lock a little
sooner since we're finished with it.
Changes since v9:
- Only enable/disable sagv on Skylake
Changes since v8:
- Add intel_state->modeset guard to the conditional for
skl_enable_sagv()
Changes since v7:
- Remove GEN9_SAGV_LOW_FREQ, replace with GEN9_SAGV_IS_ENABLED (that's
all we use it for anyway)
- Use GEN9_SAGV_IS_ENABLED instead of 0x1 for clarification
- Fix a styling error that snuck past me
Changes since v6:
- Protect skl_enable_sagv() with intel_state->modeset conditional in
intel_atomic_commit_tail()
Changes since v5:
- Don't use is_power_of_2. Makes things confusing
- Don't use the old state to figure out whether or not to
enable/disable the sagv, use the new one
- Split the loop in skl_disable_sagv into it's own function
- Move skl_sagv_enable/disable() calls into intel_atomic_commit_tail()
Changes since v4:
- Use is_power_of_2 against active_crtcs to check whether we have > 1
pipe enabled
- Fix skl_sagv_get_hw_state(): (temp & 0x1) indicates disabled, 0x0
enabled
- Call skl_sagv_enable/disable() from pre/post-plane updates
Changes since v3:
- Use time_before() to compare timeout to jiffies
Changes since v2:
- Really apply minor style nitpicks to patch this time
Changes since v1:
- Added comments about this probably being one of the requirements to
fixing Skylake's watermark issues
- Minor style nitpicks from Matt Roper
- Disable these functions on Broxton, since it doesn't have an SAGV
Signed-off-by: Lyude <cpaul@redhat.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1471463761-26796-3-git-send-email-cpaul@redhat.com
[mlankhorst: ENOSYS -> ENXIO, whitespace fixes]
(cherry picked from commit 656d1b89e5)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
In the recent patch
bc3d674 drm/i915: Allow userspace to request no-error-capture upon ...
the final version moved the flags and the associated #defines around
so they were adjacent; unfortunately, they ended up between a comment
and the thing (hw_id) to which the comment applies :(
So this patch reshuffles the comment and subject back together.
Also, as we're touching 'hw_id', let's change it from just 'unsigned'
to a fully-specified 'unsigned int', because some code checking tools
(including checkpatch) object to plain 'unsigned'.
Fixes: bc3d674462 ("drm/i915: Allow userspace to request no-error-capture...")
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1471616622-6919-1-git-send-email-david.s.gordon@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 0be81156b3)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
We'd end up NULL pointer dereferencing because we didn't take the
error path out in the parent. Fixes igt vc4_lookup_fail test.
Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: d5b1a78a77 ("drm/vc4: Add support for drawing 3D frames.")
Cc: stable@vger.kernel.org
Overflow memory handling is tricky: While it's still referenced by the
BPO registers, we want to keep it from being freed. When we are
putting a new set of overflow memory in the registers, we need to
assign the old one to the last rendering job using it.
We were looking at "what's currently running in the binner", but since
the bin/render submission split, we may end up with the binner
completing and having no new job while the renderer is still
processing. So, if we don't find a bin job at all, look at the
highest-seqno (last) render job to attach our overflow to.
Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: ca26d28bba ("drm/vc4: improve throughput by pipelining binning and rendering jobs")
Cc: stable@vger.kernel.org
The BO cache will complain if BOs are still allocated when we try to
destroy it (since freeing those BOs would try to hit the cache). You
could hit this if you were to unload the module after a GPU hang.
Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: 214613656b ("drm/vc4: Add an interface for capturing the GPU state after a hang.")
If the device was already up, a 1 is returned instead of 0. We were
erroring out, leading the 3D driver to sometimes fail at screen
initialization (generally with ENOENT returned to it).
Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: af713795c5 ("drm/vc4: Add a getparam ioctl for getting the V3D identity regs.")
If you exceeded the size that kmalloc would return, you'd get a dmesg
warning and a return from the job submit. We can handle much
allocations with vmalloc, and drm_malloc_ab makes that decision.
Fixes failure in piglit's scissor-many.
Signed-off-by: Eric Anholt <eric@anholt.net>
If you managed to exceed the limit to switch to vmalloc, we'd use the
wrong free.
Signed-off-by: Eric Anholt <eric@anholt.net>
Fixes: d5b1a78a77 ("drm/vc4: Add support for drawing 3D frames.")
Cc: stable@vger.kernel.org
Pull more drm fixes from Dave Airlie:
"Daniel pointed out I'd missed some i915 fixes, and I also found a
single etnaviv fix I missed.
So here they are"
* tag 'drm-fixes-for-4.8-rc3-2' of git://people.freedesktop.org/~airlied/linux:
drm/etnaviv: take GPU lock later in the submit process
drm/i915: Fix modeset handling during gpu reset, v5.
drm/i915: fix aliasing_ppgtt leak
drm/i915: fix WaInsertDummyPushConstPs
drm/i915: Fix iboost setting for SKL Y/U DP DDI buffer translation entry 2
drm/i915/gen9: Give one extra block per line for SKL plane WM calculations
drm/i915: Acquire audio powerwell for HD-Audio registers
drm/i915: Add missing rpm wakelock to GGTT pread
drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake
drm/i915: Clean up the extra RPM ref on CHV with i915.enable_rc6=0
drm/i915: Program iboost settings for HDMI/DVI on SKL
drm/i915: Fix iboost setting for DDI with 4 lanes on SKL
drm/i915: Handle ENOSPC after failing to insert a mappable node
drm/i915: Flush GT idle status upon reset
Collection of i915 fixes.
* tag 'drm-intel-fixes-2016-08-15' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Fix modeset handling during gpu reset, v5.
drm/i915: fix aliasing_ppgtt leak
drm/i915: fix WaInsertDummyPushConstPs
drm/i915: Fix iboost setting for SKL Y/U DP DDI buffer translation entry 2
drm/i915/gen9: Give one extra block per line for SKL plane WM calculations
drm/i915: Acquire audio powerwell for HD-Audio registers
drm/i915: Add missing rpm wakelock to GGTT pread
drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake
drm/i915: Clean up the extra RPM ref on CHV with i915.enable_rc6=0
drm/i915: Program iboost settings for HDMI/DVI on SKL
drm/i915: Fix iboost setting for DDI with 4 lanes on SKL
drm/i915: Handle ENOSPC after failing to insert a mappable node
drm/i915: Flush GT idle status upon reset
Both the fence and event alloc are safe to be done without holding the GPU
lock, as they either don't need any locking (fences) or are protected by
their own lock (events).
This solves a bad locking interaction between the submit path and the
recover worker. If userspace manages to exhaust all available events while
the GPU is hung, the submit will wait for events to become available
holding the GPU lock. The recover worker waits for this lock to become
available before trying to recover the GPU which frees up the allocated
events. Essentially both paths are deadlocked until the submit path
times out waiting for available events, failing the submit that could
otherwise be handled just fine if the recover worker had the chance to
bring the GPU back in a working state.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Some AMD fixes and remove workaround now we have pcieport pm.
* 'drm-fixes-4.8' of git://people.freedesktop.org/~agd5f/linux:
drm/amdgpu: Fix memory trashing if UVD ring test fails
drm/amdgpu: fix vm init error path
Revert "drm/radeon: work around lack of upstream ACPI support for D3cold"
Revert "drm/amdgpu: work around lack of upstream ACPI support for D3cold"
ARM SMCCC is only set for ARMv7 and ARMv8 CPUs, but we currently
allow the driver to be build for older architecture levels as
well, which results in a link failure:
drivers/gpu/built-in.o: In function `mtk_hdmi_hw_make_reg_writable':
:(.text+0x1e737c): undefined reference to `arm_smccc_smc'
This adds a Kconfig dependency. The patch applies on my two
previous fixes that are not yet applied, so please apply all
three to get randconfig builds to work correctly.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 8f83f26891 ("drm/mediatek: Add HDMI support")
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
The mediatek DRM driver can be configured for compile testing with
CONFIG_OF disabled, but then fails to link:
drivers/gpu/built-in.o: In function `mtk_drm_bind':
analogix_dp_reg.c:(.text+0x52888): undefined reference to `of_find_device_by_node'
analogix_dp_reg.c:(.text+0x52930): undefined reference to `of_find_device_by_node'
This adds an explicit Kconfig dependency.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patchwork.kernel.org/patch/9120871/
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
On kernel builds without COMMON_CLK, the newly added mediatek drm
driver fails to build:
drivers/gpu/drm/mediatek/mtk_mipi_tx.c:130:16: error: field 'pll_hw' has incomplete type
struct clk_hw pll_hw;
^~~~~~
In file included from ../include/linux/clk.h:16:0,
from ../drivers/gpu/drm/mediatek/mtk_mipi_tx.c:14:
drivers/gpu/drm/mediatek/mtk_mipi_tx.c: In function 'mtk_mipi_tx_from_clk_hw':
include/linux/kernel.h:831:48: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
^
/drivers/gpu/drm/mediatek/mtk_mipi_tx.c:136:9: note: in expansion of macro 'container_of'
return container_of(hw, struct mtk_mipi_tx, pll_hw);
^~~~~~~~~~~~
drivers/gpu/drm/mediatek/mtk_mipi_tx.c: At top level:
drivers/gpu/drm/mediatek/mtk_mipi_tx.c:302:21: error: variable 'mtk_mipi_tx_pll_ops' has initializer but incomplete type
static const struct clk_ops mtk_mipi_tx_pll_ops = {
This adds the required Kconfig dependency.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://patchwork.kernel.org/patch/9069061/
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This function would call drm_modeset_lock_all, while the suspend/resume
functions already have their own locking. Fix this by factoring out
__intel_display_resume, and calling the atomic helpers for duplicating
atomic state and disabling all crtc's during suspend.
Changes since v1:
- Deal with -EDEADLK right after lock_all and clean up calls
to hw readout.
- Always take all modeset locks so updates during gpu reset are blocked.
Changes since v2:
- Fix deadlock in intel_update_primary_planes.
- Move WARN_ON(EDEADLK) to __intel_display_resume.
- pctx -> ctx
- only call __intel_display_resume on success in intel_display_resume.
Changes since v3:
- Rebase on top of dev_priv -> dev change.
- Use drm_modeset_lock_all_ctx instead of drm_modeset_lock_all.
Changes since v4 [by vsyrjala]:
- Deal with skip_intermediate_wm
- Update comment w.r.t. mode_config.mutex vs. ->detect()
- Rebase due to INTEL_GEN() etc.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Fixes: e2c8b8701e ("drm/i915: Use atomic helpers for suspend, v2.")
Cc: stable@vger.kernel.org
Tested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470428910-12125-2-git-send-email-ville.syrjala@linux.intel.com
(cherry picked from commit 7397489399)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Erratum SKL075: Display Flicker May Occur When Both VT-d And FBC Are Enabled
"Display flickering may occur when both FBC (Frame Buffer Compression)
and VT - d (Intel® Virtualization Technology for Directed I/O) are enabled
and in use by the display controller."
Ville found the w/a name in the database:
WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt and also dug out that it
affects Broxton.
v2: Log when the quirk is applied.
v3: Ensure i915.enable_fbc is false when !HAS_FBC()
v4: Fix function name after rebase
v5: Add Broxton to the workaround
Note for backporting to stable, we need to add
#define mkwrite_device_info(ptr) \
((struct intel_device_info *)INTEL_INFO(ptr))
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: stable@vger.kernel.org
Link: http://patchwork.freedesktop.org/patch/msgid/1470296633-20388-1-git-send-email-chris@chris-wilson.co.uk
(cherry picked from commit 36dbc4d769)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
The doorbell offset is formatted with a 0x prefix to suggest it is
a hexadecimal value, when in fact %d is being used and this is confusing.
Use %X instead to match the proceeding 0x prefix.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
cirrus_modeset_init() is initializing/registering the emulated fbdev
and, since commit c61b93fe51 ("drm/atomic: Fix remaining places where
!funcs->best_encoder is valid"), DRM internals can access/test some of
the fields in mode_config->funcs as part of the fbdev registration
process.
Make sure dev->mode_config.funcs is properly set to avoid dereferencing
a NULL pointer.
Reported-by: Mike Marshall <hubcap@omnibond.com>
Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Fixes: c61b93fe51 ("drm/atomic: Fix remaining places where !funcs->best_encoder is valid")
Signed-off-by: Dave Airlie <airlied@redhat.com>
