Plane sanitation needs vblank interrupts (on account of CxSR disable).
So let's restore vblank interrupts earlier.

v2: Make it actually build
v3: Add comment to explain why we need this (Daniel)

Cc: stable@vger.kernel.org
Cc: Dennis <dennis.nezic@utoronto.ca>
Tested-by: Dennis <dennis.nezic@utoronto.ca>
Tested-by: Peter Nowee <peter.nowee@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105637
Fixes: b1e01595

 ("drm/i915: Redo plane sanitation during readout")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181003144951.4397-1-ville.syrjala@linux.intel.com

Always print out the information whether the port and sink can each
do MST. And let's include the modparam in the debug output as well.
Makes life a little less confusing when you don't have to wonder
why MST isn't kicking in.

This does cause a slight change in our behaviour towards the sink.
Previously we only read the MSTM_CAP register after passing all
the other checks. Now we will read that register regardless. Hopefully
some crazy sink doesn't get confused by a simple register read.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181003184210.1306-1-ville.syrjala@linux.intel.com
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>

If the HW has not processed the db invalidation request yet, clearing
the cookie can generate a db ring. We clear the cookie when we
(re-)allocate the doorbell so no need to do it on destroy as well as no
one is going to look at it while the doorbell is inactive

v2: fix typo in patch title (Michal)

Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20181002215430.15049-2-daniele.ceraolospurio@intel.com

GuC stores some data in there, which might be stale after a reset.
We already reset the WQ head and tail, but more things are being moved
to the descriptor with the interface updates. Instead of trying to track
them one by one, always memset and init the descriptors from scratch
after GuC is loaded.
The code is also reorganized so that the above operations and the
doorbell creation are grouped as "client enabling"

v2: add proc_desc_fini for symmetry (Daniele), remove unneeded var init,
add guc_is_alive() (Michal)

Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20181002215430.15049-1-daniele.ceraolospurio@intel.com

Inside the execlists submission tasklet, we often make the mistake of
assuming that everything beneath the request is available for use.
However, the submission and the request live on two separate timelines,
and the request contents may be freed from an early retirement before we
have had a chance to run the submission tasklet (think ksoftirqd). To
safeguard ourselves against any mistakes, flush the tasklet before we
unpin the context if execlists still has a reference to this context.

v2: Pull hw_context->active tracking into schedule_in and schedule_out.

References: 60367132

 ("drm/i915: Avoid use-after-free of ctx in request tracepoints")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181003110941.27886-1-chris@chris-wilson.co.uk

We do not need to continually clear our dedicated PTE for error capture
as it will be updated and invalidated to the next object. Only at the
end do we wish to be sure that the PTE doesn't point back to any buffer.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001194447.29910-3-chris@chris-wilson.co.uk

The final call to zlib_deflate(Z_FINISH) may require more output
space to be allocated and so needs to re-invoked. Failure to do so in
the current code leads to incomplete zlib streams (albeit intact due to
the use of Z_SYNC_FLUSH) resulting in the occasional short object
capture.

v2: Check against overrunning our pre-allocated page array
v3: Drop Z_SYNC_FLUSH entirely

Testcase: igt/i915-error-capture.js
Fixes: 0a97015d

 ("drm/i915: Compress GPU objects in error state")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.10+
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181003082422.23214-1-chris@chris-wilson.co.uk

As the kthread may terminate itself, the parent must hold a task_struct
reference for it to call kthread_stop().

<4> [498.827675] stack segment: 0000 [#1] PREEMPT SMP PTI
<4> [498.827683] CPU: 0 PID: 3872 Comm: drv_selftest Tainted: G     U            4.19.0-rc6-CI-CI_DRM_4915+ #1
<4> [498.827686] Hardware name: Intel Corporation NUC7CJYH/NUC7JYB, BIOS JYGLKCPX.86A.0027.2018.0125.1347 01/25/2018
<4> [498.827695] RIP: 0010:kthread_stop+0x36/0x210
<4> [498.827698] Code: 05 df 3d f6 7e 89 c0 48 0f a3 05 95 f8 29 01 0f 82 56 01 00 00 f0 ff 43 20 f6 43 26 20 0f 84 7f 01 00 00 48 8b ab b0 05 00 00 <f0> 80 4d 00 02 48 89 df e8 5d ff ff ff 48 89 df e8 15 c7 00 00 48
<4> [498.827701] RSP: 0018:ffffc900003937d0 EFLAGS: 00010202
<4> [498.827704] RAX: 0000000000000001 RBX: ffff8802165ece40 RCX: 0000000000000001
<4> [498.827707] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff82247460
<4> [498.827709] RBP: 6b6b6b6b6b6b6b6b R08: 00000000581395cb R09: 0000000000000001
<4> [498.827711] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000393868
<4> [498.827713] R13: ffffc900003937f0 R14: ffff88026c068040 R15: 0000000000001057
<4> [498.827716] FS:  00007fc0c464b980(0000) GS:ffff880277e00000(0000) knlGS:0000000000000000
<4> [498.827718] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [498.827720] CR2: 000056178c2feca0 CR3: 000000026983c000 CR4: 0000000000340ef0
<4> [498.827723] Call Trace:
<4> [498.827824]  smoke_crescendo+0x14c/0x1d0 [i915]
<4> [498.827837]  ? _raw_spin_unlock_irqrestore+0x4c/0x60
<4> [498.827898]  ? __i915_gem_context_pin_hw_id+0x69/0x5f0 [i915]
<4> [498.827902]  ? ida_alloc_range+0x1f2/0x3d0
<4> [498.827907]  ? __mutex_unlock_slowpath+0x46/0x2b0
<4> [498.827914]  ? rcu_lockdep_current_cpu_online+0x8f/0xd0
<4> [498.827979]  live_preempt_smoke+0x2c2/0x470 [i915]
<4> [498.828047]  __i915_subtests+0x5e/0xf0 [i915]
<4> [498.828113]  __run_selftests+0x10b/0x190 [i915]
<4> [498.828175]  i915_live_selftests+0x2c/0x60 [i915]
<4> [498.828232]  i915_pci_probe+0x50/0xa0 [i915]
<4> [498.828238]  pci_device_probe+0xa1/0x130
<4> [498.828244]  really_probe+0x25d/0x3c0
<4> [498.828249]  driver_probe_device+0x10a/0x120
<4> [498.828253]  __driver_attach+0xdb/0x100
<4> [498.828256]  ? driver_probe_device+0x120/0x120
<4> [498.828259]  bus_for_each_dev+0x74/0xc0
<4> [498.828264]  bus_add_driver+0x15f/0x250
<4> [498.828268]  ? 0xffffffffa00c3000
<4> [498.828271]  driver_register+0x56/0xe0
<4> [498.828274]  ? 0xffffffffa00c3000
<4> [498.828278]  do_one_initcall+0x58/0x2e0
<4> [498.828281]  ? rcu_lockdep_current_cpu_online+0x8f/0xd0
<4> [498.828285]  ? do_init_module+0x1d/0x1ea
<4> [498.828289]  ? rcu_read_lock_sched_held+0x6f/0x80
<4> [498.828293]  ? kmem_cache_alloc_trace+0x264/0x290
<4> [498.828297]  do_init_module+0x56/0x1ea
<4> [498.828302]  load_module+0x26f5/0x29d0
<4> [498.828309]  ? vfs_read+0x122/0x140
<4> [498.828318]  ? __se_sys_finit_module+0xd3/0xf0
<4> [498.828321]  __se_sys_finit_module+0xd3/0xf0
<4> [498.828329]  do_syscall_64+0x55/0x190
<4> [498.828332]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [498.828335] RIP: 0033:0x7fc0c3f16839

Fixes: 992d2098

 ("drm/i915/selftests: Split preemption smoke test into threads")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181002132927.7669-1-chris@chris-wilson.co.uk

We have new tests and fixes in place since the feature was last
disabled. Try again for gen-9+ hardware and enable only PSR1 by default as
a first step.
v2: Remove typo fix and comment improvements (Rodrigo)

Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Jose Roberto de Souza <jose.souza@intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
References: commit 2ee7dc49 ("drm/i915: disable PSR by default on HSW/BDW")
References: commit dcb2e993

 ("Revert "drm/i915: Enable PSR by default on Valleyview and Cherryview."")
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Tested-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180928061117.12394-1-dhinakaran.pandiyan@intel.com

During driver load it's considered that the i915_driver_create()
function fails only in case of insufficient memory. Indeed, in
case of failure of i915_driver_create(), the load function
returns indiscriminately -ENOMEM ignoring the real cause of
failure.

In i915_driver_create() get the consistent error value from
drm_dev_init() and embed it in the pointer return value.

Signed-off-by: Andi Shyti <andi.shyti@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20181002092047.14705-1-andi.shyti@intel.com

Previously we hesitated in adding the hw probe for the actual GPU
frequency for rps_boost as it is quite cumbersome, but given some
surprising HW behaviour it would be useful to know both the RPS boost
state and the actual HW state in one location.

v2: vlv/chv needs more tlc

Reported-by: Tomi Sarvela <tomi.p.sarvela@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181002113221.29208-1-chris@chris-wilson.co.uk

A few callsites were deciding on using WC or WB maps based on
HAS_LLC(), so replace them with the equivalent helper function
i915_coherent_map_type().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001194447.29910-1-chris@chris-wilson.co.uk

Add plane alpha blending support with the different blend modes.
This has been tested on a icl to show the correct results,
on earlier platforms small rounding errors cause issues. But this
already happens case with fully transparant or fully opaque RGB8888
fb's.

The recommended HW workaround is to disable alpha blending when the
plane alpha is 0 (transparant, hide plane) or 0xff (opaque, disable blending).
This is easy to implement on any platform, so just do that.

The tests for userspace are also available, and pass on gen11.

Changes since v1:
- Change mistaken < 0xff0 to 0xff00.
- Only set PLANE_KEYMSK_ALPHA_ENABLE when plane alpha < 0xff00, ignore blend mode.
- Rework disabling FBC when per pixel alpha is used.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
[mlankhorst: Change MISSING_CASE default to explicit alpha disable (mattrope)]
Link: https://patchwork.freedesktop.org/patch/msgid/20180815103405.22679-1-maarten.lankhorst@linux.intel.com
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>

As DMC Package contain DMC FW for multiple steppings including default
stepping. This patch will help to load FW for that particular stepping,
if FW for that stepping is available, instead of loading default FW.

v2 : Fix formatting issue.

Signed-off-by: Jyoti Yadav <jyoti.r.yadav@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1536169347-31326-1-git-send-email-jyoti.r.yadav@intel.com

Latency is in the eye of the beholder. In the case where a client stops
and waits for the gpu, give that request chain a small priority boost
(not so that it overtakes higher priority clients, to preserve the
external ordering) so that ideally the wait completes earlier.

v2: Tvrtko recommends to keep the boost-from-user-stall as small as
possible and to allow new client flows to be preferred for interactivity
over stalls.

Testcase: igt/gem_sync/switch-default
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Dmitry Rogozhkin <dmitry.v.rogozhkin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001144755.7978-3-chris@chris-wilson.co.uk

Currently, the backend scheduling code abuses struct_mutex into order to
have a global lock to manipulate a temporary list (without widespread
allocation) and to protect against list modifications. This is an
extraneous coupling to struct_mutex and further can not extend beyond
the local device.

Pull all the code that needs to be under the one true lock into
i915_scheduler.c, and make it so.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001144755.7978-2-chris@chris-wilson.co.uk

Taken from an idea used for FQ_CODEL, we give the first request of a
new request flows a small priority boost. These flows are likely to
correspond with short, interactive tasks and so be more latency sensitive
than the longer free running queues. As soon as the client has more than
one request in the queue, further requests are not boosted and it settles
down into ordinary steady state behaviour.  Such small kicks dramatically
help combat the starvation issue, by allowing each client the opportunity
to run even when the system is under heavy throughput load (within the
constraints of the user selected priority).

v2: Mark the preempted request as the start of a new flow, to prevent a
single client being continually gazumped by its peers.

Testcase: igt/benchmarks/rrul
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001144755.7978-1-chris@chris-wilson.co.uk

Make life simpler by passing around intel_encoder instead of
drm_encoder.

@r1@
identifier F =~ "infoframe";
identifier I, M;
@@
F(
- struct drm_encoder *I
+ struct intel_encoder *I
  , ...)
{
<...
(
- I->M
+ I->base.M
|
- I
+ &I->base
)
...>
}

@r2@
identifier F =~ "infoframe";
identifier I;
type T, ST;
@@
ST {
...
	T (*F)(
-	       struct drm_encoder *I
+	       struct intel_encoder *encoder
	       , ...);
...
};

@@
identifier r1.F;
expression E;
@@
F(
- E
+ to_intel_encoder(E)
  ,...)

@@
identifier r2.F;
expression E, X;
@@
(
X.F(
-   E
+   to_intel_encoder(E)
    ,...)
|
X->F(
-    E
+    to_intel_encoder(E)
     ,...)
)

@@
expression E;
@@
(
- to_intel_encoder(&E->base)
+ E
|
- to_intel_encoder(&E->base.base)
+ &E->base
)

@@
identifier D, M;
expression E;
@@
 D = enc_to_dig_port(&E->base)
<...
(
- D->base.M
+ E->M
|
- &D->base
+ E
)
...>

@@
identifier D;
expression E;
type T;
@@
- T D = enc_to_dig_port(E);
... when != D

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180920185145.1912-10-ville.syrjala@linux.intel.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Replace the hand rolled memmove() with the real thing.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180920185145.1912-9-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

As we are about to allow ourselves to slightly bump the user priority
into a few different sublevels, packthose internal priority lists
into the same i915_priolist to keep the rbtree compact and avoid having
to allocate the default user priority even after the internal bumping.
The downside to having an requests[] rather than a node per active list,
is that we then have to walk over the empty higher priority lists. To
compensate, we track the active buckets and use a small bitmap to skip
over any inactive ones.

v2: Use MASK of internal levels to simplify our usage.
v3: Prevent overflow when SHIFT is zero.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001123204.23982-4-chris@chris-wilson.co.uk

In the next few patches, we will want to give a small priority boost to
some requests/queues but not so much that we perturb the user controlled
order. As such we will shift the user priority bits higher leaving
ourselves a few low priority bits for our internal bumping.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001123204.23982-3-chris@chris-wilson.co.uk

Include a batch full of a page of arbitration points in order to provide
a window for inject_preempt_context() in the preemption smoketests.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001123204.23982-2-chris@chris-wilson.co.uk

When submitting chains to each engine, we can do so (mostly) in
parallel, so delegate submission to threads on a per-engine basis.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181001123204.23982-1-chris@chris-wilson.co.uk

We've opted to use the maximum link rate and lane count for eDP panels,
because typically the maximum supported configuration reported by the
panel has matched the native resolution requirements of the panel, and
optimizing the link has lead to problems.

With eDP 1.4 rate select method and DSC features, this is decreasingly
the case. There's a need to optimize the link parameters. Moreover,
already eDP 1.3 states fast link with fewer lanes is preferred over the
wide and slow. (Wide and slow should still be more reliable for longer
cable lengths.)

Additionally, there have been reports of panels failing on arbitrary
link configurations, although arguably all configurations they claim to
support should work.

Optimize eDP 1.4+ link config fast and narrow.

Side note: The implementation has a near duplicate of the link config
function, with just the two inner for loops turned inside out. Perhaps
there'd be a way to make this, say, more table driven to reduce the
duplication, but seems like that would lead to duplication in the table
generation. We'll also have to see how the link config optimization for
DSC turns out.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Cc: "Lee, Shawn C" <shawn.c.lee@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105267
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180905095321.13843-1-jani.nikula@intel.com

There are two copies of the same code called from long and short
pulse handlers.

v2: Rebase due to s/int status/enum drm_connector_status in
intel_dp_detect()
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927205735.16651-6-dhinakaran.pandiyan@intel.com

The intel_dp->detect_done flag is no more useful. Pull
intel_dp_long_pulse() into the lone caller,

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927205735.16651-5-dhinakaran.pandiyan@intel.com

A crtc modeset lock was added for link retraining but
intel_dp_retrain_link() knows to take the necessary locks since
commit c85d200e ("drm/i915: Move SST DP link retraining into the
->post_hotplug() hook")
v2: Drop AUX power domain reference in the early return path

Fixes: c85d200e

 ("drm/i915: Move SST DP link retraining into the ->post_hotplug() hook")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927205735.16651-4-dhinakaran.pandiyan@intel.com

We have two cases of intel_dp to intel_encoder conversions, use a
local variable to store the conversion.

Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927205735.16651-3-dhinakaran.pandiyan@intel.com

Commit '3cf71bc9 ("drm/i915: Re-apply "Perform link quality check,
unconditionally during long pulse"")' applies a work around for sinks
that don't signal link loss. The work around does not need to have to be
that broad as the issue was seen with only one particular monitor; limit
this only for external displays as eDP features like PSR turn off the link
and the driver ends up retraining the link seeeing that link is not
synchronized.

Cc: Lyude Paul <lyude@redhat.com>
Cc: Jan-Marek Glogowski <glogow@fbihome.de>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
References: 3cf71bc9

 ("drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"")
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927205735.16651-2-dhinakaran.pandiyan@intel.com

Comment claims link needs to be retrained because the connected sink raised
a long pulse to indicate link loss. If the sink did so,
intel_dp_hotplug() would have handled link retraining. Looking at the
logs in Bugzilla referenced in commit '3cf71bc9 ("drm/i915: Re-apply
Perform link quality check, unconditionally during long pulse"")', the
issue is that the sink does not trigger an interrupt. What we want is
->detect() from user space to check link status and retrain. Ville's
review for the original patch also indicates the same root cause. So,
rewrite the comment.

v2: Patch split and rewrote comment.

Cc: Lyude Paul <lyude@redhat.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Jan-Marek Glogowski <glogow@fbihome.de>
References: 3cf71bc9

 ("drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"")
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927205735.16651-1-dhinakaran.pandiyan@intel.com

If the request is currently on the HW (in port 0), then we do not need
to kick the submission tasklet to evaluate whether we should be
preempting itself in order to execute it again.

In the case that was annoying me:

   execlists_schedule: rq(18:211173).prio=0 -> 2
   need_preempt: last(18:211174).prio=0, queue.prio=2

We are bumping the priority of the first of a pair of requests running
in the current context. Then when evaluating preempt, we would see that
that our priority request is higher than the last executing request in
ELSP0 and so trigger preemption, not realising that our intended request
was already executing.

v2: As we assume state of the execlists->port[] that is only valid while
we hold the timeline lock we have to repeat some earlier tests that on
the validity of the node.
v3: Wrap guc submission under the timeline.lock as is now the way of all
things.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180925083205.2229-2-chris@chris-wilson.co.uk

Use uniform prefixes for firmware path, version and size. Unify
alignments. Order macro groups as in the if ladder using them. Add
platform specific max firmware size macros for all platforms for clarity
in the if ladder. Place the max firmware size macros in the platform
specific macro groups.

No functional changes.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180927075311.5076-1-jani.nikula@intel.com

So far we have only been calling
drm_connector_init_panel_orientation_property(), which checks for
panel orientation quirks in the drm_panel_orientation_quirks.c file,
for DSI panels as so far only devices with DSI panels have had panels
which are not mounted up right.

The new GPD win2 device uses a portrait screen in a landscape case,
so now we've a device with an eDP panel which needs the panel-orientation
property to let the fbcon code and userspace know that the image needs to
be fixed-up.

This commit makes intel_edp_init_connector() call
drm_connector_init_panel_orientation_property() so that the property
gets added.

Reported-and-tested-by:  <russianneuromancer@ya.ru>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180909133457.10636-2-hdegoede@redhat.com

Now that we are confident in providing full-ppgtt where supported,
remove the ability to override the context isolation.

v2: Remove faked aliasing-ppgtt for testing as it no longer is accepted.
v3: s/USES/HAS/ to match usage and reject attempts to load the module on
old GVT-g setups that do not provide support for full-ppgtt.
v4: Insulate ABI ppGTT values from our internal enum (later plans
involve moving ppGTT depth out of the enum, thus potentially breaking
ABI unless we document the current values).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Zhi Wang <zhi.a.wang@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926201222.5643-1-chris@chris-wilson.co.uk

We mix hexa- and decimal which is confusing when reading the logs. So make
the single odd one out instance decimal for consistency.

v2:
 * Do the intel_ringbuffer.c as well. (Chris Wilson)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926145033.16318-1-tvrtko.ursulin@linux.intel.com

Partial views are small but there can be many of them, and since the sg
list space for them is allocated pessimistically, we can save some slab by
trimming the unused tail entries.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926080353.20867-1-tvrtko.ursulin@linux.intel.com

Very light stress test to bombard the submission backends with a large
stream with requests of randomly assigned priorities. Preemption will be
occasionally requested, but unlikely to ever succeed! (Although we may
build a long queue of requests and so may trigger an attempt to inject a
preempt context, as we emit no batch, the arbitration window is limited
to between requests inside the ringbuffer. The likelihood of actually
causing a preemption event is therefore very small. A later variant
should try to improve the likelihood of preemption events!)

v2: Include a second pattern with more frequent preemption

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180925083205.2229-1-chris@chris-wilson.co.uk

With i915.dmc_firmware_path="" it's obvious the intention is to disable
CSR firmware loading. Bypass the firmware request altogether in this
case, with more obvious debug logging.

v2: Use DRM_INFO for logging (Chris)

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926133414.22073-3-jani.nikula@intel.com

Move max firmware size to the same if ladder with firmware name and
required version. This allows us to detect the missing max size for a
platform without actually loading the firmware, and makes the whole
thing easier to maintain.

We need to move the power get earlier to allow for early return in the
missing platform case. While at it, extend the comment on why we return
with the reference held on errors.

We also need to move the module parameter override later to reuse the
max firmware size, which is independent of the override.

v2: Add comment on why we leak the wakeref on errors (Chris)

v3: Rebase

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926133414.22073-2-jani.nikula@intel.com

Having two separate if ladders gets increasingly hard to maintain. Put
them together.

v2: Rebase

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180926133414.22073-1-jani.nikula@intel.com