sna: Handle rotated slaved scanouts

As per the usual handling of rotated scanouts with unsupported
rotations, we stage the drawing onto a backbuffer then rotate onto the
crtc later. The difference here is that we must read the contents from
the master pixmap rather than our own screen pixmap.

Spotted was looking at slaved scanouts mistakenly setting the CRTC
transformed flag.

Reported-by: Tomas Pruzina <pruzinat@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81383
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Add missing DBG parameters

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Avoid confusing failure to flip and flipping zero CRTC

During the present unflip path we blindly try to restore the original
mode after a flip failure. However, it confuses flipping zero CRTC with
a genuine failure. This has the result of undoing a DPMS change (e.g.
xset dpms force dpms) under a DRI3 compositor.

Reported-by: Jiri Slaby <jirislaby@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=81456
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Busy-wait for the kernel to catch up when flipping

If the kernel reports that it is busy, it has not yet finished
processing a pending flip and we have multiple CRTC queued, just wait
for the kernel to clear its backlog before submitting the next flip. On
the other hand, if we can just overwrite the pending flip results.
However, the EBUSY may actually be a genuine report by the kernel of an
error, so check for an invalid CRTC first.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Silence valgrind when reading plane properties

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Remove extraneous function wrapping

Since we only have the single callsite for do_page_flip, the wrapper is
not adding any meaningful information.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: And remove new bogus assertion

We assert that damage is valid as we delete the Pixmap, and so we cannot
assert that the Pixmap is still valid itself.

Reported-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Make the damage check more verbose

Print out the pixmap number and the damage extents for when the
assertion fails.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/gen2+: Remove assertion on draw->type for fills

I overlooked the tiling-fill path passing down a temporary DrawableRec
into the fill_boxes callback - invalidating the assertion.

Fixes regression from
commit 43176b9bfafe389c4b9ed676f4e50e3b06f858c4
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Jun 30 21:01:11 2014 +0100

    sna/dri2: Pass around the correct DrawableRec for sampling from the foriegn bo

Reported-by: Jiri Slaby <jirislaby@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=70461#c62
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Use a stricter test for determining CRTC off before updating the cursor

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Reduce reflections onto rotations

In order to support a wider range of rotation/reflections, perform a
simple reduction of the requested rotation first.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

configure: Provide a poor man's replacement for getline()

uClibc is one such library that doesn't implement getline()

Reported-by: Ben Widawsky <benjamin.widawsky@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Rewrite rotation setup on top of universal drm planes

The kernel interface has changed slightly since the early proposals. Now
the rotation property is only on the plane and so we have to lookup the
primary prime as well.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Fix a couple of DBG messages

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test/lowlevel-blt-bench: Add common PDF operators

Applications are starting to use PDF operators, so far I have spotted
multiply, dodge and lighten.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

backlight: Fix security issues in handling of the interface path name.

- don't allow '/' in the interface name to avoid escaping the /sys
  hierarchy
- check snprintf() return value for overflow.

Problems reported by  Adam Sampson. Thanks.

Signed-off-by: Matthieu Herrb <matthieu@herrb.eu>
Reviewed-by: Reviewed-by: Hans de Goede <hdegoede@redhat.com>

sna: Discard operations to either CPU or GPU bo when overwriting with RenderRectangles

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Tweak number of threads for short areas

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Convert a clear tile into a solid fill

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Fix typo s/num_threads/max_threads/

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Do a quirk early check for short areas before threading

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Disable use of threaded compositor when using threaded renderer

Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Utilise existing cached upload for promoting to GPU bo

If we already have a buffer that represents the data on the GPU, we can
simply use that when we need to promote the pixmap onto the GPU.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Promote tile pixmaps to GPU when reused

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/gen8: Disable the unaligned check

Note sure if this is strictly required -- but at the moment it fails for
1x1R solids, causing us to skip glyphs. The simulator doesn't complain,
so just skip the check for now.

Reported-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Tighten assertions for using upload proxies concurrently with CPU reads

After relaxing some of the rules on when to discard the upload proxies,
we also need to relax some of the complementary asserts.

Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Prevent creating a GPU bo for an inplace read

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Wrap xf86DPMSSet

We need to wrap xf86DPMSSet() so that we can reintialize our bookkeeping
and auxiliary planes after disabling/re-enabling CRTC during DPMS
operations.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Clear the cursor reference from the CRTC if the update fails

This should allow it to be restored correctly the next time it gets
shown.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Limit the size of the tiling object to be smaller than either the originals

When we tile, we do so in order to fit an operation involving two
objects larger than the aperture. If we then choose an intermediate
tiling object that is larger than either of those two, the error will
persist and we will be forced to recuse.

In the worst case, this will provide an upper bound to the recursion.

Reported-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test: Create separate SHM segments for ref/out

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Use the threaded compositor for picture conversions

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/gen6+: Tweak consideration of compositing on BLT

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Fix typo in LinearFramebuffer handling

Eeek, when not using LinearFramebuffer we still want to create the GPU
bo: s/,/;/

Reported-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Correct migration flags for initial scanout creation

We want to preserve any contents preloaded (not that there should be
any...)

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Add a DBG option to select copy method

Often when debugging it is useful to force either use of the BLT or 3D
pipelines for copies.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Enforce LinearFramebuffer option

This option should only be used for compatibility. Previously this was
done at a high level, this changes it to enforce the tiling as we apply
the CRTC.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Use CPU fallback if possible

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Set depth/bpp on scratch DrawableRec

We need to initialise both depth and bitsPerPixel on the drawable struct
we pass around as they are used for selecting for the format when
copying.

Reported-by: Vedran Rodic <vrodic@gmail.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel: Use the i845 info structure for INTEL_I845G_IDS()

I assume the intention was to provide a different structure for each of
the gen 2 devices.

This doesn't change anything really.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

sna: Add DBG breadcrumbs before flushes in BLT

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Pass around the correct DrawableRec for sampling from the foriegn bo

One day, we will move the width/height/bpp to the bo itself...

Reported-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Apply the paraniod buffer clip in the correct coordinate system

We need to only clip to the extents of the copy in the buffer space -
which implies that we need to translate the region into that space before
doing the clip.

Reported-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Tweak preference for small GPU bo

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test/lowlevel-blt-bench: Update progress more frequently

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Reduce assertion when using asynchronous CPU access

If we are not actually accessing the memory through the pointer, we do
not care if it not currently coherent.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Silence snarky compliers

0 != (void *)0

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Mollify assert to be consistent with the scanout flush

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test/lowlevel-blt-bench: Exercise masks

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test/lowlevel-blt-bench: Exercise SHM pixmaps

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel-virtual-output: Remove one redundant cleanup on error

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel-virtual-output: Cleanup singleton on failure

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel-virtual-output: Convert debugging messages to verbosity

Original patch by main.haarp:
"A verbose switch is quite useful for debugging, it shouldn't require
editing and recompilation to gain more useful output. I added it."

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80664
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Ensure CPU bo is synchronized before writing

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Update allocation of CPU bo to avoid creating active buffers

Since we now prefer CPU detiling, exactly when we want active/inactive
buffers is a little more complex - and we also need to take into account
when we want to use the CPU bo as a render target.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Sync CPU bo before writes

Fixes regression from

commit 961139f5878572ebea268a0bbf47caf05af9093f [2.99.912]
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri May 30 09:45:15 2014 +0100

    sna: Use manual detiling for downloads

Reported-by: Harald Judt <h.judt@gmx.at>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80560
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Only preferentially upload through the GTT for large transfers

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Prefer linear if below tile_width

Be stricter in order to allow greater use of CPU bo.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/io: Prefer CPU copies on LLC

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Don't discard damage for SHM pixmaps

We don't really want to rendering into SHM pixmaps except for copying
back due to the strict serialisation requirements.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Check for a mappable GPU bo before migrating damage

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Skip adding damage if it is already contained

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Tidy calling memcpy_from_tiled

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Micro-optimise unswizzling tiling/detiling

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/trapezoids: Handle mono traps just in case

I disabled a few paths and ended up in an assert that mono trapezoids
shouldn't get that far...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

uxa: Update Screen Pixmap width/height first

Since commit dd6db82680b05cde4a47116b7096c054f3837e20 [2.99.912]
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri May 9 20:26:19 2014 +0100

    uxa: Add DRI3 and miSyncShm support

we verify that the attaching bo meets the constraints required for the
Pixmap. However, when updating the ScreenPixmap following a resize, we
did not update the Pixmap size until after we tried to update the bo,
resulting in a validation failure when shrinking the screen.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

test: Expand number of sources for basic benchmarking

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: DBG compile fixes

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/glyphs: Add DBG option for glyph tolerance

And bump it to 3 so that glyph filtering doesn't force us to use the
mask too often.

References: https://bugs.freedesktop.org/show_bug.cgi?id=77436
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/glyphs: Add DBG option for forcing glyphs-to-dst

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Check source bo is suitable for BLT before doing so

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Only reuse pinned batches for 830/845

Trying to fly too close to the sun. :(

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80558
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Slightly improved DBG messages

Missing git add from

commit 2e8c09f3fe468abba9c307ba3d7b2d22908e1172
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jun 25 22:19:23 2014 +0100

    sna/dri2: Hook into ClientGone callback to clear dangling references

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Tidy selection of a near-miss active buffer.

References: https://bugs.freedesktop.org/show_bug.cgi?id=80560
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Fix userptr defines to match i915_drm.h

Now that we are starting to see userptr in the headers, we see that the
definitions slightly changed.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Remove scare quotes from hotplug detection "enabled"

Tidy up the log message by improving its formatting, and making it more
accurate.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Hook into ClientGone callback to clear dangling references

As the Window may exist for multiple Clients, we cannot rely on the
destruction of the Window decoupling all outstanding events and
preventing chasing a stale Client pointer.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80157
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Make output destroy more defensive

We may never create the properties as it may be ignored or the
allocation may fail, so we need to be careful when freeing we do not
stumble over invalid pointers.

References: https://bugs.freedesktop.org/show_bug.cgi?id=80355#c28
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/dri2: Compile fixes for ancient Xorg

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Fix uninitialisable variable

sna_render.c: In function 'sna_render_picture_downsample':
sna_render.c:822: warning: 'priv' may be used uninitialized in this function

introduced in

commit ded05e8abb248664124d2b86f77c27497a252c4e
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Mon Jun 23 22:15:56 2014 +0100

    sna: Allow scratch pixmap to allocate linear GPU bo

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Improve throttling during bo allocation

By controlling how long we may block during buffer allocation, we can
relax the throttle elsewhere to prevent render lag buildup.

References: https://bugs.freedesktop.org/show_bug.cgi?id=77436
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Only mark throttle as done after success

References: https://bugs.freedesktop.org/show_bug.cgi?id=77436
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Track desired flushes better after starting a new batch

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel: Fix weblinks (again)

Julien pointed out that I fail at checking links.

Reported-by: Julien Cristau <jcristau@debian.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel: Fix weblinks

Matti reported a few outdated links to intellinuxgraphics.org, now
superseded by 01.org.

Reported-by: Matti Hämäläinen <ccr@tnsp.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Tweak scanout flush

We now distinguish gpu_dirty whilst the bo is not flushed within a batch
and needs_flush for when it is dirty and still busy.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Throttle before doing a TearFree buffer replacement

If the client is rendering fast, he may be rendering too fast and
starting to build up a backlog.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: And fix the typo...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Disable userptr for bdw

Something fishy is afoot. But let's kill this particularly worrisome
regression so that we can do a full round of testing.

References: https://bugs.freedesktop.org/show_bug.cgi?id=79053
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Check all connectors for reuse

Do not rely on the MST path being present to indicate a connector that
may be reused.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80355
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

Add marketing names for Broadwell

Even the unknown/reserved ones will stay with HD Graphics.

v2: Add missing names to intel.man and README files as well. (Chris)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Add reserved PCD IDs for Broadwell

Updating using kernel commit fb7023e0e248a33cb00d0a9cdce0bcedaa1ad284
Author: Rodrigo Vivi <rodrigo.vivi@intel.com>
Date:   Tue Jun 10 10:09:52 2014 -0700

    drm/i915: BDW: Adding Reserved PCI IDs.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Add yet more DBG messages to MST discovery

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

configure: Display our README before the summary

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel: Add a note about the myriad places we have identifier strings

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

intel: Wait for our expected device node to appear

If the path we want to open for the KMS device is not yet available,
wait a short while and try again.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80397
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Add some more DBG around connector discovery

References: https://bugs.freedesktop.org/show_bug.cgi?id=80355
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Ensure serial is not 0 for runtime MST discovery

We reserve serial==0 for the initial setup that is run before RandR is
configured. After the server is running, we have to take extra steps to
make the outputs visible to userspace.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna: Fix the usual "x = y" typos in creating boxes

Fixes regression from

commit 1d74b2e07d125ad95b9db6c9c032e90faf2bfa60
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Tue Jun 24 08:58:51 2014 +0100

    sna: Decompose self-copy into overlapping/non-overlapping regions

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

sna/glyphs: Clip damage to dst

We only check if the hardware will automatically discard writes outside
of the target pixmap, but we must manually clip the damage before adding
it to our tracker.

Reported-by: Jiri Slaby <jirislaby@gmail.com>
Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=70461#c58
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>