GitHub/LineageOS/android_kernel_motorola_exynos9610.git
9 years agodrm/i915: Use round to closest when computing the CEA 1.001 pixel clocks
Ville Syrjälä [Thu, 8 Oct 2015 08:43:34 +0000 (11:43 +0300)]
drm/i915: Use round to closest when computing the CEA 1.001 pixel clocks

drm_edid.c now computes the alternate CEA clocks using
DIV_ROUND_CLOSEST(), so follow suit in the N/CTS setup to make sure we
pick the right setting for the mode.

Unfortunately we can't actually use DIV_ROUND_CLOSEST() here due to the
({}) construct used, so just stick in raw numbers instead.

Cc: Clint Taylor <clinton.a.taylor@intel.com>
Cc: Libin Yang <libin.yang@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Kill the leftover RMW from ivb_sprite_disable()
Ville Syrjälä [Thu, 15 Oct 2015 14:04:04 +0000 (17:04 +0300)]
drm/i915: Kill the leftover RMW from ivb_sprite_disable()

We still had one lingering RMW in ivb_sprite_disable(), all the other
RMWs were killed off from the sprite code some time ago. Kill the
straggler too.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: restore ggtt double-bind avoidance
Daniel Vetter [Thu, 15 Oct 2015 12:23:01 +0000 (14:23 +0200)]
drm/i915: restore ggtt double-bind avoidance

This was accidentally lost in

commit 75d04a3773ecee617847de963ae4195d6aa74c28
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date:   Tue Apr 28 17:56:17 2015 +0300

    drm/i915/gtt: Allocate va range only if vma is not bound

While at it implement an improved version suggested by Chris which
avoids the double-bind irrespective of what type of bind is done
first.

Note that this exact bug was already addressed in

commit d0e30adc42d979e4adc36b6c112b57337423b70c
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Wed Jul 29 20:02:48 2015 +0100

    drm/i915: Mark PIN_USER binding as GLOBAL_BIND without the aliasing ppgtt

but the problem is still that originally in

commit 0875546c5318c85c13d07014af5350e9000bc9e9
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Mon Apr 20 09:04:05 2015 -0700

    drm/i915: Fix up the vma aliasing ppgtt binding

if forgotten to take into account there case where we have a
GLOBAL_BIND before a LOCAL_BIND. This patch here fixes that.

v2: Pimp commit message and revert the partial fix.

v3: Split into two functions to specialize on aliasing_ppgtt y/n.

v4: WARN_ON for paranoia in the init sequence, since the ggtt probe
and aliasing ppgtt setup are far apart.

v5: Style nits.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michel Thierry <michel.thierry@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://mid.gmane.org/1444911781-32607-1-git-send-email-daniel.vetter@ffwll.ch
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl: Enable pipe gamma for sprite planes.
Bob Paauwe [Thu, 27 Aug 2015 20:46:30 +0000 (13:46 -0700)]
drm/i915/skl: Enable pipe gamma for sprite planes.

Since SKL has universal planes, we should configure the sprite planes
and the primary plane the same.  For the primary plane we do enable
the pipe gamma on the plane so do the same for the non-primary planes.

Without this, the pipe CRC values will be different for something
displayed on the primary plane and something displayed on a sprite
plane when the ARGB8888 format is used.

Signed-off-by: Bob Paauwe <bob.j.paauwe@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl+: Enable pipe CSC on cursor planes. (v2)
Bob Paauwe [Mon, 31 Aug 2015 21:03:30 +0000 (14:03 -0700)]
drm/i915/skl+: Enable pipe CSC on cursor planes. (v2)

Extend this to SKL and BXT as it's needed for these platforms as well.

v2: Change if condition to HAS_DDI() instead of listing each platform
Signed-off-by: Bob Paauwe <bob.j.paauwe@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoMAINTAINERS: add link to the Intel Graphics for Linux web site
Jani Nikula [Tue, 13 Oct 2015 08:16:48 +0000 (11:16 +0300)]
MAINTAINERS: add link to the Intel Graphics for Linux web site

There's plenty of drm/i915 related hardware and software documentation,
and firmware downloads for the latest platforms.

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Move skl/bxt gt specific workarounds to ring init
Mika Kuoppala [Mon, 12 Oct 2015 10:20:59 +0000 (13:20 +0300)]
drm/i915: Move skl/bxt gt specific workarounds to ring init

Some registers are, naturally, lost in gpu reset/suspend cycle.
And some registers, for example in display domain, are not subject
to gpu reset so they retain their contents.

As hang recovery triggers a reset, recoverable gpu hang can currently
flush out essential workarounds and cause havoc later on.

When register GEN8_GARBNTL is missing the WaEnableGapsTsvCreditFix:skl,
it can cause random system hangs [1]. This workaround was added in:
commit 245d96670d26 ("drm/i915:skl: Add WaEnableGapsTsvCreditFix")
But another set of system hangs were observed and the failure pattern
indicated that there was random gpu hang preceding the system hang [2].
This lead to the realization that we lose this workaround and BDW_SCRATCH1
on reset.

Add these workarounds setup in display init to skl/bxt ring init
where LRI workarounds are also setup. This way their setup is not
dependent on display side init.

References: [1] https://bugs.freedesktop.org/show_bug.cgi?id=90854
References: [2] https://bugs.freedesktop.org/show_bug.cgi?id=92315
Reported-by: Tomi Sarvela <tomix.p.sarvela@intel.com>
Cc: Tomi Sarvela <tomix.p.sarvela@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Tested-by: Tomi Sarvela <tomix.p.sarvela@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Drop i915_gem_obj_is_pinned() from set-cache-level
Chris Wilson [Fri, 9 Oct 2015 13:11:27 +0000 (14:11 +0100)]
drm/i915: Drop i915_gem_obj_is_pinned() from set-cache-level

Since the remove of the pin-ioctl, we only care about not changing the
cache level on buffers pinned to the hardware as indicated by
obj->pin_display. By knowing that only objects pinned to the hardware
will have an elevated vma->pin_count, so we can coallesce many of the
linear walks over the obj->vma_list.

v2: Try and retrospectively add comments explaining the steps in
rebinding the active VMA.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: revert a few more watermark commits
Paulo Zanoni [Fri, 9 Oct 2015 21:22:43 +0000 (18:22 -0300)]
drm/i915: revert a few more watermark commits

This is a squash of the following commits:

Revert "drm/i915: Drop intel_update_sprite_watermarks"
This reverts commit 47c99438b52d12df50e182583634a4cfede3c920.

Revert "drm/i915/ivb: Move WaCxSRDisabledForSpriteScaling w/a to atomic check"
This reverts commit 7809e5ae35b9d8d0710f0874b2e3f10be144e38b.

Revert "drm/i915/skl: Eliminate usage of pipe_wm_parameters from SKL-style WM (v3)"
This reverts commit 3a05f5e2e78eab7ffe816abb59b6769e331a1957.

With these reverts, SKL finally stops failing every single FBC test
with FIFO underrun error messages. After some brief testing, it also
seems that this commit prevents the machine from completely freezing
when we run igt/kms_fbc_crc (see fd.o #92355).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92355
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove dev_priv argument from NEEDS_FORCE_WAKE
Ville Syrjälä [Fri, 18 Sep 2015 17:03:46 +0000 (20:03 +0300)]
drm/i915: Remove dev_priv argument from NEEDS_FORCE_WAKE

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Clean up LVDS register handling
Ville Syrjälä [Fri, 18 Sep 2015 17:03:45 +0000 (20:03 +0300)]
drm/i915: Clean up LVDS register handling

Keep single 'lvds_reg' and 'lvds' variable around in
intel_lvds_init(), and read it just once at the start.

Also intel_lvds_get_config() doesn't need to figure out which reg to use
since it can just consult lvds_encoder->reg.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Throw out some useless variables
Ville Syrjälä [Tue, 22 Sep 2015 16:50:01 +0000 (19:50 +0300)]
drm/i915: Throw out some useless variables

Drop some useless 'reg' variables when we only use them once.

v2: A few more, including a few variable moves

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Parametrize and fix SWF registers
Ville Syrjälä [Fri, 18 Sep 2015 17:03:43 +0000 (20:03 +0300)]
drm/i915: Parametrize and fix SWF registers

Parametrize the SWF registers. This also fixes the register offsets,
which were mostly garbage in the old defines.

Also save/restore only as many SWF registers that each platform has.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: s/PIPE_FRMCOUNT_GM45/PIPE_FRMCOUNT_G4X/ etc.
Ville Syrjälä [Fri, 18 Sep 2015 17:03:42 +0000 (20:03 +0300)]
drm/i915: s/PIPE_FRMCOUNT_GM45/PIPE_FRMCOUNT_G4X/ etc.

The PIPE_FRMCOUNT_GM45 and PIPE_FLIPCOUNT_GM45 names have bothered me
for a long time. The work equally well for ELK and onwards, so let's
s/GM45/G4X/.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Turn GEN5_ASSERT_IIR_IS_ZERO() into a function
Ville Syrjälä [Fri, 18 Sep 2015 17:03:41 +0000 (20:03 +0300)]
drm/i915: Turn GEN5_ASSERT_IIR_IS_ZERO() into a function

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix a few bad hex numbers in register defines
Ville Syrjälä [Fri, 18 Sep 2015 17:03:40 +0000 (20:03 +0300)]
drm/i915: Fix a few bad hex numbers in register defines

A few register mask defines were missing the '0x' from hex numbers. Or
at least I assume those were meant to be hex numbers. Put the '0x' in
place.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Protect register macro arguments
Ville Syrjälä [Fri, 18 Sep 2015 17:03:39 +0000 (20:03 +0300)]
drm/i915: Protect register macro arguments

Always put parens around macro argument evaluations.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Include gpio_mmio_base in GMBUS reg defines
Ville Syrjälä [Fri, 18 Sep 2015 17:03:38 +0000 (20:03 +0300)]
drm/i915: Include gpio_mmio_base in GMBUS reg defines

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Parametrize HSW video DIP data registers
Ville Syrjälä [Fri, 18 Sep 2015 17:03:37 +0000 (20:03 +0300)]
drm/i915: Parametrize HSW video DIP data registers

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Eliminate weird parameter inversion from BXT PPS registers
Ville Syrjälä [Mon, 12 Oct 2015 16:41:08 +0000 (19:41 +0300)]
drm/i915: Eliminate weird parameter inversion from BXT PPS registers

v2: Keep using the same registers (PCH_*) instead of accidentally
    starting to use the other ones (BXT_*)2) (Jesse)

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Hold dev->event_lock whilst inspecting intel_crtc->unpin_work
Chris Wilson [Sat, 10 Oct 2015 09:44:32 +0000 (10:44 +0100)]
drm/i915: Hold dev->event_lock whilst inspecting intel_crtc->unpin_work

We should serialise access to the intel_crtc->unpin_work through the
dev->event_lock spinlock. It should not be possible for it to disappear
without severe error as the mmio_flip worker has not tagged the
unpin_work pending flip-completion. Similarly if the error exists, just
taking the unpin_work whilst holding the spinlock and then using it
unserialised just masks the race. (It is supposed to be valid as the
unpin_work exists until the flip completion interrupt which should not
fire until we flush the mmio writes to update the display base which is
the last time we access the unpin_work from the kthread.)

References: https://bugs.freedesktop.org/show_bug.cgi?id=92335
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoi915: switch from acpi_os_ioremap to memremap
Williams, Dan J [Mon, 12 Oct 2015 21:12:57 +0000 (21:12 +0000)]
i915: switch from acpi_os_ioremap to memremap

i915 expects the OpRegion to be cached (i.e. not __iomem), so explicitly
map it with memremap rather than the implied cache setting of
acpi_os_ioremap().

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Drop unnecessary #include <linux/vga_switcheroo.h>
Lukas Wunner [Mon, 12 Oct 2015 08:57:43 +0000 (10:57 +0200)]
drm/i915: Drop unnecessary #include <linux/vga_switcheroo.h>

Commit 599bbb9de0fe ("drm/i915: i915 cannot provide switcher services.")
removed all remaining vga_switcheroo symbols from intel_acpi.c but left
the include. Drop it.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Update DRIVER_DATE to 20151010
Daniel Vetter [Sat, 10 Oct 2015 11:35:42 +0000 (13:35 +0200)]
drm/i915: Update DRIVER_DATE to 20151010

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Partial revert of atomic watermark series
Matt Roper [Thu, 8 Oct 2015 22:28:25 +0000 (15:28 -0700)]
drm/i915: Partial revert of atomic watermark series

It's been reported that the atomic watermark series triggers some
regressions on SKL, which we haven't been able to track down yet.  Let's
temporarily revert these patches while we track down the root cause.

This commit squashes the reverts of:
  76305b1 drm/i915: Calculate watermark configuration during atomic check (v2)
  a4611e4 drm/i915: Don't set plane visible during HW readout if CRTC is off
  a28170f drm/i915: Calculate ILK-style watermarks during atomic check (v3)
  de4a9f8 drm/i915: Calculate pipe watermarks into CRTC state (v3)
  de165e0 drm/i915: Refactor ilk_update_wm (v3)

Reference: http://lists.freedesktop.org/archives/intel-gfx/2015-October/077190.html
Cc: "Zanoni, Paulo R" <paulo.r.zanoni@intel.com>
Cc: "Vetter, Daniel" <daniel.vetter@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Early exit from semaphore_waits_for for execlist mode.
Tomas Elf [Thu, 8 Oct 2015 18:31:33 +0000 (19:31 +0100)]
drm/i915: Early exit from semaphore_waits_for for execlist mode.

When submitting semaphores in execlist mode the hang checker crashes in this
function because it is only runnable in ring submission mode. The reason this
is of particular interest to the TDR patch series is because we use semaphores
as a mean to induce hangs during testing (which is the recommended way to
induce hangs for gen8+). It's not clear how this is supposed to work in
execlist mode since:

1. This function requires a ring buffer.

2. Retrieving a ring buffer in execlist mode requires us to retrieve the
corresponding context, which we get from a request.

3. Retieving a request from the hang checker is not straight-forward since that
requires us to grab the struct_mutex in order to synchronize against the
request retirement thread.

4. Grabbing the struct_mutex from the hang checker is nothing that we will do
since that puts us at risk of deadlock since a hung thread might be holding the
struct_mutex already.

Therefore it's not obvious how we're supposed to deal with this. For now, we're
doing an early exit from this function, which avoids any kernel panic situation
when running our own internal TDR ULT.

* v2: (Chris Wilson)
Turned the execlist mode check into a ringbuffer NULL check to make it more
submission mode agnostic and less of a layering violation.

Signed-off-by: Tomas Elf <tomas.elf@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove wrong warning from i915_gem_context_clean
Tvrtko Ursulin [Thu, 8 Oct 2015 14:37:00 +0000 (15:37 +0100)]
drm/i915: Remove wrong warning from i915_gem_context_clean

commit e9f24d5fb7cf3628b195b18ff3ac4e37937ceeae
Author: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Date:   Mon Oct 5 13:26:36 2015 +0100

    drm/i915: Clean up associated VMAs on context destruction

Introduced a wrong assumption that all contexts have a ppgtt
instance. This is not true when full PPGTT is not active so
remove the WARN_ON_ONCE from the context cleanup code.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Determine the stolen memory base address on gen2
Ville Syrjälä [Thu, 8 Oct 2015 09:08:20 +0000 (12:08 +0300)]
drm/i915: Determine the stolen memory base address on gen2

There isn't an explicit stolen memory base register on gen2.
Some old comment in the i915 code suggests we should get it via
max_low_pfn_mapped, but that's clearly a bad idea on my MGM.

The e820 map in said machine looks like this:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009f7ff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009f800-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000ce000-0x00000000000cffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000dc000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000001f6effff] usable
[    0.000000] BIOS-e820: [mem 0x000000001f6f0000-0x000000001f6f7fff] ACPI data
[    0.000000] BIOS-e820: [mem 0x000000001f6f8000-0x000000001f6fffff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x000000001f700000-0x000000001fffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fec10000-0x00000000fec1ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000ffb00000-0x00000000ffbfffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fff00000-0x00000000ffffffff] reserved

That makes max_low_pfn_mapped = 1f6f0000, so assuming our stolen memory
would start there would place it on top of some ACPI memory regions.
So not a good idea as already stated.

The 9MB region after the ACPI regions at 0x1f700000 however looks
promising given that the macine reports the stolen memory size to be
8MB. Looking at the PGTBL_CTL register, the GTT entries are at offset
0x1fee00000, and given that the GTT entries occupy 128KB, it looks like
the stolen memory could start at 0x1f700000 and the GTT entries would
occupy the last 128KB of the stolen memory.

After some more digging through chipset documentation, I've determined
the BIOS first allocates space for something called TSEG (something to
do with SMM) from the top of memory, and then it allocates the graphics
stolen memory below that. Accordind to the chipset documentation TSEG
has a fixed size of 1MB on 855. So that explains the top 1MB in the
e820 region. And it also confirms that the GTT entries are in fact at
the end of the the stolen memory region.

Derive the stolen memory base address on gen2 the same as the BIOS does
(TOM-TSEG_SIZE-stolen_size). There are a few differences between the
registers on various gen2 chipsets, so a few different codepaths are
required.

865G is again bit more special since it seems to support enough memory
to hit 4GB address space issues. This means the PCI allocations will
also affect the location of the stolen memory. Fortunately there
appears to be the TOUD register which may give us the correct answer
directly. But the chipset docs are a bit unclear, so I'm not 100%
sure that the graphics stolen memory is always the last thing the
BIOS steals. Someone would need to verify it on a real system.

I tested this on the my 830 and 855 machines, and so far everything
looks peachy.

v2: Rewrite to use the TOM-TSEG_SIZE-stolen_size and TOUD methods
v3: Fix TSEG size for 830
v4: Add missing 'else' (Chris)

Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: fix FBC buffer size checks
Paulo Zanoni [Thu, 1 Oct 2015 22:57:12 +0000 (19:57 -0300)]
drm/i915: fix FBC buffer size checks

According to my experiments (and later confirmation from the hardware
developers), the maximum sizes mentioned in the specification delimit
how far in the buffer the hardware tracking can go. And the hardware
calculates the size based on the plane address we provide - and the
provided plane address might not be the real x:0,y:0 point due to the
compute_page_offset() function.

On platforms that do the x/y offset adjustment trick it will be really
hard to reproduce a bug, but on the current SKL we can reproduce the
bug with igt/kms_frontbuffer_tracking/fbc-farfromfence. With this
patch, we'll go from "CRC assertion failure" to "FBC unexpectedly
disabled", which is still a failure on the test suite but is not a
perceived user bug - you will just not save as much power as you could
if FBC is disabled.

v2, rewrite patch after clarification from the Hadware guys:
  - Rename function so it's clear what the check is for.
  - Use the new intel_fbc_get_plane_source_sizes() function in order
    to get the proper sizes as seen by FBC.
v3:
  - Rebase after the s/sizes/size/ on the previous patch.
  - Adjust comment wording (Ville).
  - s/used_/effective_/ (Ville).

Testcase: igt/kms_frontbuffer_tracking/fbc-farfromfence (SKL)
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: fix CFB size calculation
Paulo Zanoni [Thu, 1 Oct 2015 22:55:57 +0000 (19:55 -0300)]
drm/i915: fix CFB size calculation

We were considering the whole framebuffer height, but the spec says we
should only consider the active display height size. There were still
some unclear questions based on the spec, but the hardware guys
clarified them for us. According to them:

- CFB size = CFB stride * Number of lines FBC writes to CFB
- CFB stride = plane stride / compression limit
- Number of lines FBC writes to CFB = MIN(plane source height, maximum
  number of lines FBC writes to CFB)
- Plane source height =
  - pipe source height (PIPE_SRCSZ register) (before SKL)
  - plane size register height (PLANE_SIZE register) (SKL+)
- Maximum number of lines FBC writes to CFB =
  - plane source height (before HSW)
  - 2048 (HSW+)

For the plane source height, I could just have made our code do
I915_READ() in order to be more future proof, but since it's not cool
to do register reads I decided to just recalculate the values we use
when we actually write to those registers.

With this patch, depending on your machine configuration, a lot of the
kms_frontbuffer_tracking subtests that used to result in a SKIP due to
not enough stolen memory still start resulting in a PASS.

v2: Use the clipped src size instead of pipe_src_h (Ville).
v3: Use the appropriate information provided by the hardware guys.
v4: Bikesheds: s/sizes/size/, s/fb_cpp/cpp/ (Ville).
v5: - Don't use crtc->config->pipe_src_x for BDW- (Ville).
    - Fix the register name written in the comment.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: remove pre-atomic check from SKL update_primary_plane
Paulo Zanoni [Wed, 30 Sep 2015 20:05:43 +0000 (17:05 -0300)]
drm/i915: remove pre-atomic check from SKL update_primary_plane

The comment suggests the check was there for some non-fully-atomic
case, and I couldn't find a case where we wouldn't correctly
initialize plane_state, so remove the check.

Let's leave a WARN there just in case.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Acked-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: don't allocate fbcon from stolen memory if it's too big
Paulo Zanoni [Wed, 23 Sep 2015 15:52:23 +0000 (12:52 -0300)]
drm/i915: don't allocate fbcon from stolen memory if it's too big

Technology has evolved and now we have eDP panels with 3200x1800
resolution. In the meantime, the BIOS guys didn't change the default
32mb for stolen memory. On top of that, we can't assume our users will
be able to increase the default stolen memory size to more than 32mb -
I'm not even sure all BIOSes allow that.

So just the fbcon buffer alone eats 22mb of my stolen memroy, and due
to the BDW/SKL restriction of not using the last 8mb of stolen memory,
all that's left for FBC is 2mb! Since fbcon is not the coolest feature
ever, I think it's better to save our precious stolen resource to FBC
and the other guys.

On the other hand, we really want to use as much stolen memory as
possible, since on some older systems the stolen memory may be a
considerable percentage of the total available memory.

This patch tries to achieve a little balance using a simple heuristic:
if the fbcon wants more than half of the available stolen memory,
don't use stolen memory in order to leave some for FBC and the other
features.

The long term plan should be to implement a way to set priorities for
stolen memory allocation and then evict low priority users when the
high priority ones need the memory. While we still don't have that,
let's try to make FBC usable with the simple solution.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoRevert "drm/i915: Call encoder hotplug for init and resume cases"
Daniel Vetter [Thu, 8 Oct 2015 19:51:57 +0000 (21:51 +0200)]
Revert "drm/i915: Call encoder hotplug for init and resume cases"

This reverts commit 5d250b05918c002b63632c7db91c3c5f924c6a3b.

It results on a deadlock on platforms where we need to (at least
partially) re-init hpd interrupts from power domain code, since
->hot_plug might again grab a power well reference (to do edid/dp_aux
transactions. At least chv is affected.

Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
References: http://mid.gmane.org/20151008133548.GX26517@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agoRevert "drm/i915: Add hot_plug hook for hdmi encoder"
Daniel Vetter [Thu, 8 Oct 2015 19:50:57 +0000 (21:50 +0200)]
Revert "drm/i915: Add hot_plug hook for hdmi encoder"

This reverts commit 0b5e88dc25ee6c9040c0355e6e025dcbc9c8de92.

It completely breaks booting on at least bsw (and maybe more).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88081
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: use error path
Sudip Mukherjee [Thu, 8 Oct 2015 13:57:59 +0000 (19:27 +0530)]
drm/i915: use error path

Use goto to handle the error path to avoid duplicating the same code. In
the error path intel_dig_port is the last one to be released as it was
the first one to be allocated and ideally the error path should be the
reverse of the execution path.

Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/irq: Fix misspelled word register in kernel-doc
Javier Martinez Canillas [Thu, 8 Oct 2015 07:57:49 +0000 (09:57 +0200)]
drm/i915/irq: Fix misspelled word register in kernel-doc

There is a typo in the function i915_handle_error()
kernel-doc and the word register is spelled wrongly.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/irq: Fix kernel-doc warnings
Javier Martinez Canillas [Thu, 8 Oct 2015 07:54:44 +0000 (09:54 +0200)]
drm/i915/irq: Fix kernel-doc warnings

Add the dev parameter for the functions i915_enable_asle_pipestat() and
i915_reset_and_wakeup() to the kernel-doc to fix the following warnings:

.//drivers/gpu/drm/i915/i915_irq.c:586: warning: No description found for parameter 'dev'
.//drivers/gpu/drm/i915/i915_irq.c:2400: warning: No description found for parameter 'dev'

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Hook up ring workaround writes at context creation time on Gen6-7.
Francisco Jerez [Wed, 7 Oct 2015 11:44:02 +0000 (14:44 +0300)]
drm/i915: Hook up ring workaround writes at context creation time on Gen6-7.

intel_rcs_ctx_init() emits all workaround register writes on the list
to the ring, in addition to calling i915_gem_render_state_init().  The
workaround list is currently empty on Gen6-7 so this shouldn't cause
any functional changes.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't warn if the workaround list is empty.
Francisco Jerez [Wed, 7 Oct 2015 11:44:01 +0000 (14:44 +0300)]
drm/i915: Don't warn if the workaround list is empty.

It's not an error for the workaround list to be empty if no
workarounds are needed.  This will avoid spamming the logs
unnecessarily on Gen6 after the workaround list is hooked up on
pre-Gen8 hardware by the following commits.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Resurrect golden context on gen6/7
Daniel Vetter [Thu, 1 Oct 2015 16:06:50 +0000 (18:06 +0200)]
drm/i915: Resurrect golden context on gen6/7

In

commit 8f0e2b9d95a88ca5d8349deef2375644faf184ae
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Dec 2 16:19:07 2014 +0100

    drm/i915: Move golden context init into ->init_context

I've shuffled around per-ctx init code a bit for legacy contexts but
accidentally dropped the render state init call on gen6/7. Resurrect
it.

Reported-by: Francisco Jerez <currojerez@riseup.net>
Cc: Francisco Jerez <currojerez@riseup.net>
Cc: Dave Gordon <david.s.gordon@intel.com>
Cc: Thomas Daniel <thomas.daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/chv: remove pre-production hardware workarounds
Jani Nikula [Wed, 7 Oct 2015 08:17:46 +0000 (11:17 +0300)]
drm/i915/chv: remove pre-production hardware workarounds

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
[danvet: Appease gcc and remove the unused variable.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/snb: remove pre-production hardware workaround
Jani Nikula [Wed, 7 Oct 2015 08:17:44 +0000 (11:17 +0300)]
drm/i915/snb: remove pre-production hardware workaround

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: Set time interval unit to 0.833us
Akash Goel [Fri, 18 Sep 2015 18:09:51 +0000 (23:39 +0530)]
drm/i915/bxt: Set time interval unit to 0.833us

Note that in Bspec you have to dig around in a section called
"Timestamp bases" and Bspec update request is filed.

Signed-off-by: Ankitprasad Sharma <ankitprasad.r.sharma@intel.com>
Signed-off-by: Akash Goel <akash.goel@intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
[danvet: Add note about state of Bspec.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Kill DRI1 cliprects
Chris Wilson [Tue, 6 Oct 2015 10:39:55 +0000 (11:39 +0100)]
drm/i915: Kill DRI1 cliprects

Passing cliprects into the kernel for it to re-execute the batch buffer
with different CMD_DRAWRECT died out long ago. As DRI1 support has been
removed from the kernel, we can now simply reject any execbuf trying to
use this "feature".

To keep Daniel happy with the prospect of being able to reuse these
fields in the next decade, continue to ensure that current userspace is
not passing garbage in through the dead fields.

v2: Fix the cliprects_ptr check

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Avoid GPU stalls from kswapd
Chris Wilson [Thu, 1 Oct 2015 11:18:29 +0000 (12:18 +0100)]
drm/i915: Avoid GPU stalls from kswapd

Exclude active GPU pages from the purview of the background shrinker
(kswapd), as these cause uncontrollable GPU stalls. Given that the
shrinker is rerun until the freelists are satisfied, we should have
opportunity in subsequent passes to recover the pages once idle. If the
machine does run out of memory entirely, we have the forced idling in the
oom-notifier as a means of releasing all the pages we can before an oom
is prematurely executed.

Note that this relies upon an up-front retire_requests to keep the
inactive list in shape, which was added in a previous patch, mostly as
execlist ctx pinning band-aids.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
[danvet: Add note about retire_requests.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Remove dead i915_gem_evict_everything()
Chris Wilson [Thu, 1 Oct 2015 11:18:28 +0000 (12:18 +0100)]
drm/i915: Remove dead i915_gem_evict_everything()

With UMS gone, we no longer use it during suspend. And with the last
user removed from the shrinker, we can remove the dead code.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: During shrink_all we only need to idle the GPU
Chris Wilson [Thu, 1 Oct 2015 11:18:27 +0000 (12:18 +0100)]
drm/i915: During shrink_all we only need to idle the GPU

We can forgo an evict-everything here as the shrinker operation itself
will unbind any vma as required. If we explicitly idle the GPU through a
switch to the default context, we not only create a request in an
illegal context (e.g. whilst shrinking during execbuf with a request
already allocated), but switching to the default context will not free
up the memory backing the active contexts - unless in the unlikely
situation that context had already been closed (and just kept arrive by
being the current context). The saving is near zero and the danger real.

To compensate for the loss of the forced retire, add a couple of
retire-requests to i915_gem_shirnk() - this should help free up any
transitive cache from the requests.

Note that the second retire_requests is for the benefit of the
hand-rolled execlist ctx active tracking: We need to manually kick
requests to get those unpinned again. Once that's fixed we can try to
remove this again.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Add summary of why we need a pile of retire_requests.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add a tracepoint for the shrinker
Chris Wilson [Thu, 1 Oct 2015 11:18:26 +0000 (12:18 +0100)]
drm/i915: Add a tracepoint for the shrinker

Often it is very useful to know why we suddenly purge vast tracts of
memory and surprisingly up until now we didn't even have a tracepoint
for when we shrink our memory.

Note that there are slab_start/end tracepoints already, but those
don't cover the internal recursion when we directly call into our
shrinker code. Hence a separate tracepoint seems justified. Also note
that we don't really need a separate tracepoint for the actual amount
of pages freed since we already have an unbind tracpoint for that.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[danvet: Add a note that there's also slab_start/end and why they're
insufficient.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: DocBook add i915_component.h support
Libin Yang [Thu, 1 Oct 2015 09:01:09 +0000 (17:01 +0800)]
drm/i915: DocBook add i915_component.h support

Add the item of i915_component.h in DocBook and add the DOC for
i915_component.h. Explain the struct i915_audio_component_ops and
struct i915_audio_component_audio_ops usage.

Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: add kerneldoc for i915_audio_component
Libin Yang [Thu, 1 Oct 2015 09:01:08 +0000 (17:01 +0800)]
drm/i915: add kerneldoc for i915_audio_component

Add the kerneldoc for i915_audio_component in i915_component.h

Signed-off-by: Libin Yang <libin.yang@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agoMerge remote-tracking branch 'takashi/topic/drm-sync-audio-rate' into drm-intel-next...
Daniel Vetter [Wed, 7 Oct 2015 13:34:15 +0000 (15:34 +0200)]
Merge remote-tracking branch 'takashi/topic/drm-sync-audio-rate' into drm-intel-next-queued

Pull in the i915/hda changes for N/CTS setting so I can apply the
follow-up documentation work for drm/i915.

Some conflicts because ofc we had to rework i915 while that N/CTS work
was going on. But not more than adjacent changes really.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: shrinker_control->nr_to_scan is now unsigned long
Chris Wilson [Thu, 1 Oct 2015 11:18:25 +0000 (12:18 +0100)]
drm/i915: shrinker_control->nr_to_scan is now unsigned long

As the shrinker_control now passes us unsigned long targets, update our
shrinker functions to match.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix kerneldoc for i915_gem_shrink_all
Daniel Vetter [Tue, 6 Oct 2015 12:47:55 +0000 (14:47 +0200)]
drm/i915: Fix kerneldoc for i915_gem_shrink_all

I've botched this, so let's fix it.

Botched in

commit eb0b44adc08c0be01a027eb009e9cdadc31e65a2
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Wed Mar 18 14:47:59 2015 +0100

    drm/i915: kerneldoc for i915_gem_shrinker.c

v2: Be a good citizen^Wmaintainer and add the proper commit citation.
Noticed by Jani.

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
9 years agodrm/i915: Use a task to cancel the userptr on invalidate_range
Chris Wilson [Thu, 1 Oct 2015 11:34:47 +0000 (12:34 +0100)]
drm/i915: Use a task to cancel the userptr on invalidate_range

Whilst discussing possible ways to trigger an invalidate_range on a
userptr with an aliased GGTT mmapping (and so cause a struct_mutex
deadlock), the conclusion is that we can, and we must, prevent any
possible deadlock by avoiding taking the mutex at all during
invalidate_range. This has numerous advantages all of which stem from
avoid the sleeping function from inside the unknown context. In
particular, it simplifies the invalidate_range because we no longer
have to juggle the spinlock/mutex and can just hold the spinlock
for the entire walk. To compensate, we have to make get_pages a bit more
complicated in order to serialise with a pending cancel_userptr worker.
As we hold the struct_mutex, we have no choice but to return EAGAIN and
hope that the worker is then flushed before we retry after reacquiring
the struct_mutex.

The important caveat is that the invalidate_range itself is no longer
synchronous. There exists a small but definite period in time in which
the old PTE's page remain accessible via the GPU. Note however that the
physical pages themselves are not invalidated by the mmu_notifier, just
the CPU view of the address space. The impact should be limited to a
delay in pages being flushed, rather than a possibility of writing to
the wrong pages. The only race condition that this worsens is remapping
an userptr active on the GPU where fresh work may still reference the
old pages due to struct_mutex contention. Given that userspace is racing
with the GPU, it is fair to say that the results are undefined.

v2: Only queue (and importantly only take one refcnt) the worker once.

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>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Fix userptr deadlock with aliased GTT mmappings
Chris Wilson [Thu, 1 Oct 2015 11:34:46 +0000 (12:34 +0100)]
drm/i915: Fix userptr deadlock with aliased GTT mmappings

Michał Winiarski found a really evil way to trigger a struct_mutex
deadlock with userptr. He found that if he allocated a userptr bo and
then GTT mmaped another bo, or even itself, at the same address as the
userptr using MAP_FIXED, he could then cause a deadlock any time we then
had to invalidate the GTT mmappings (so at will). Tvrtko then found by
repeatedly allocating GTT mmappings he could alias with an old userptr
mmap and also trigger the deadlock.

To counter act the deadlock, we make the observation that we only need
to take the struct_mutex if the object has any pages to revoke, and that
before userspace can alias with the userptr address space, it must have
invalidated the userptr->pages. Thus if we can check for those pages
outside of the struct_mutex, we can avoid the deadlock. To do so we
introduce a separate flag for userptr objects that we can inspect from
the mmu-notifier underneath its spinlock.

The patch makes one eye-catching change. That is the removal serial=0
after detecting a to-be-freed object inside the invalidate walker. I
felt setting serial=0 was a questionable pessimisation: it denies us the
chance to reuse the current iterator for the next loop (before it is
freed) and being explicit makes the reader question the validity of the
locking (since the object-free race could occur elsewhere). The
serialisation of the iterator is through the spinlock, if the object is
freed before the next loop then the notifier.serial will be incremented
and we start the walk from the beginning as we detect the invalid cache.

To try and tame the error paths and interactions with the userptr->active
flag, we have to do a fair amount of rearranging of get_pages_userptr().

v2: Grammar fixes
v3: Reorder set-active so that it is only set when obj->pages is set
(and so needs cancellation). Only the order of setting obj->pages and
the active-flag is crucial. Calling gup after invalidate-range begin
means the userptr sees the new set of backing storage (and so will not
need to invalidate its new pages), but we have to be careful not to set
the active-flag prior to successfully establishing obj->pages.
v4: Take the active->flag early so we know in the mmu-notifier when we
have to cancel a pending gup-worker.
v5: Rearrange the error path so that is not so convoluted
v6: Set pinned to 0 when negative before calling release_pages()

Reported-by: Michał Winiarski <michal.winiarski@intel.com>
Testcase: igt/gem_userptr_blits/map-fixed*
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Only update the current userptr worker
Chris Wilson [Thu, 1 Oct 2015 11:34:45 +0000 (12:34 +0100)]
drm/i915: Only update the current userptr worker

The userptr worker allows for a slight race condition where upon there
may two or more threads calling get_user_pages for the same object. When
we have the array of pages, then we serialise the update of the object.
However, the worker should only overwrite the obj->userptr.work pointer
if and only if it is the active one. Currently we clear it for a
secondary worker with the effect that we may rarely force a second
lookup.

v2: Rebase and rename a variable to avoid 80cols
v3: Mention v2

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: prevent out of range pt in the PDE macros (take 3)
Michel Thierry [Fri, 2 Oct 2015 13:16:53 +0000 (14:16 +0100)]
drm/i915: prevent out of range pt in the PDE macros (take 3)

We tried to fix this in commit fdc454c1484a ("drm/i915: Prevent out of
range pt in gen6_for_each_pde").

But the static analyzer still complains that, just before we break due
to "iter < I915_PDES", we do "pt = (pd)->page_table[iter]" with an
iter value that is bigger than I915_PDES. Of course, this isn't really
a problem since no one uses pt outside the macro. Still, every single
new usage of the macro will create a new issue for us to mark as a
false positive.

Also, Paulo re-started the discussion a while ago [1], but didn't end up
implemented.

In order to "solve" this "problem", this patch takes the ideas from
Chris and Dave, but that check would change the desired behavior of the
code, because the object (for example pdp->page_directory[iter]) can be
null during init/alloc, and C would take this as false, breaking the for
loop immediately.

This has been already verified with "static analysis tools".

[1]http://lists.freedesktop.org/archives/intel-gfx/2015-June/068548.html

v2: Make it a single statement, while preventing the common subexpression
elimination (Chris)

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dave Gordon <david.s.gordon@intel.com>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Clean up associated VMAs on context destruction
Tvrtko Ursulin [Mon, 5 Oct 2015 12:26:36 +0000 (13:26 +0100)]
drm/i915: Clean up associated VMAs on context destruction

Prevent leaking VMAs and PPGTT VMs when objects are imported
via flink.

Scenario is that any VMAs created by the importer will be left
dangling after the importer exits, or destroys the PPGTT context
with which they are associated.

This is caused by object destruction not running when the
importer closes the buffer object handle due the reference held
by the exporter. This also leaks the VM since the VMA has a
reference on it.

In practice these leaks can be observed by stopping and starting
the X server on a kernel with fbcon compiled in. Every time
X server exits another VMA will be leaked against the fbcon's
frame buffer object.

Also on systems where flink buffer sharing is used extensively,
like Android, this leak has even more serious consequences.

This version is takes a general approach from the  earlier work
by Rafael Barbalho (drm/i915: Clean-up PPGTT on context
destruction) and tries to incorporate the subsequent discussion
between Chris Wilson and Daniel Vetter.

v2:

Removed immediate cleanup on object retire - it was causing a
recursive VMA unbind via i915_gem_object_wait_rendering. And
it is in fact not even needed since by definition context
cleanup worker runs only after the last context reference has
been dropped, hence all VMAs against the VM belonging to the
context are already on the inactive list.

v3:

Previous version could deadlock since VMA unbind waits on any
rendering on an object to complete. Objects can be busy in a
different VM which would mean that the cleanup loop would do
the wait with the struct mutex held.

This is an even simpler approach where we just unbind VMAs
without waiting since we know all VMAs belonging to this VM
are idle, and there is nothing in flight, at the point
context destructor runs.

v4:

Double underscore prefix for __915_vma_unbind_no_wait and a
commit message typo fix. (Michel Thierry)

Note that this is just a partial/interim fix since we have a bit a
fundamental issue with cleaning up, e.g.

https://bugs.freedesktop.org/show_bug.cgi?id=87729

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Testcase: igt/gem_ppgtt.c/flink-and-exit-vma-leak
Reviewed-by: Michel Thierry <michel.thierry@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Rafael Barbalho <rafael.barbalho@intel.com>
Cc: Michel Thierry <michel.thierry@intel.com>
[danvet: Add a note that this isn't everything.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: vlv_dsi_reset_clocks() can be static
kbuild test robot [Mon, 5 Oct 2015 08:21:11 +0000 (16:21 +0800)]
drm/i915/bxt: vlv_dsi_reset_clocks() can be static

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Rename DP link training functions
Ander Conselvan de Oliveira [Mon, 5 Oct 2015 07:01:13 +0000 (10:01 +0300)]
drm/i915: Rename DP link training functions

The link training functions had confusing names. The start function
actually does the clock recovery phase of the link training, and the
complete function does the channel equalization. So call them that
instead. Also, every call to intel_dp_start_link_train() was followed
by a call to intel_dp_complete_link_train(), so add a new start
function that calls clock_recory and channel_equalization.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add hot_plug hook for hdmi encoder
Sonika Jindal [Mon, 5 Oct 2015 11:13:15 +0000 (16:43 +0530)]
drm/i915: Add hot_plug hook for hdmi encoder

This patch adds a separate probe function for HDMI
EDID read over DDC channel. This function has been
registered as a .hot_plug handler for HDMI encoder.

The current implementation of hdmi_detect()
function re-sets the cached HDMI edid (in connector->detect_edid) in
every detect call.This function gets called many times, sometimes
directly from userspace probes, forcing drivers to read EDID every
detect function call.This causes several problems like:

1. Race conditions in multiple hot_plug / unplug cases, between
   interrupts bottom halves and userspace detections.
2. Many Un-necessary EDID reads for single hotplug/unplug
3. HDMI complaince failures which expects only one EDID read per hotplug

This function will be serving the purpose of really reading the EDID
by really probing the DDC channel, and updating the cached EDID.

The plan is to:
1. i915 IRQ handler bottom half function already calls
   intel_encoder->hotplug() function. Adding This probe function which
   will read the EDID only in case of a hotplug / unplug.
2. During init_connector this probe will be called to read the edid
3. Reuse the cached EDID in hdmi_detect() function.

The "< gen7" check is there because this was tested only for >=gen7
platforms. For older platforms the hotplug/reading edid path remains same.

v2: Calling set_edid instead of hdmi_probe during init.
Also, for platforms having DDI, intel_encoder for DP and HDMI is same
(taken from intel_dig_port), so for DP also, hot_plug function gets called
which is not intended here. So, check for HDMI in intel_hdmi_probe
Rely on HPD for updating edid only for platforms gen > 8 and also for VLV.

v3: Dropping the gen < 8 || !VLV  check. Now all platforms should rely on
hotplug or init for updating the edid.(Daniel)
Also, calling hdmi_probe in init instead of set_edid

v4: Renaming intel_hdmi_probe to intel_hdmi_hot_plug.
Also calling this hotplug handler from intel_hpd_init to take care of init
resume scenarios.

v5: Moved the call to encoder hotplug during init to separate patch(Daniel)

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
[danvet: Mark intel_hdmi_hot_plug as static.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add GEN7_GPGPU_DISPATCHDIMX/Y/Z to the register whitelist
Jordan Justen [Fri, 2 Oct 2015 06:09:58 +0000 (23:09 -0700)]
drm/i915: Add GEN7_GPGPU_DISPATCHDIMX/Y/Z to the register whitelist

This is required to support glDispatchComputeIndirect for gen7.

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Update Promotion timer for RC6 TO Mode
Sagar Arun Kamble [Thu, 1 Oct 2015 14:59:27 +0000 (20:29 +0530)]
drm/i915: Update Promotion timer for RC6 TO Mode

When using RC6 timeout mode, the timeout value
should be written to GEN6_RC6_THRESHOLD.

v2: Updated commit message. (Tom)

v3: Rebase over whitespace differences. (Daniel)

Cc: Tom O'Rourke <Tom.O'Rourke@intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/guc: Add host2guc notification for suspend and resume
Alex Dai [Wed, 30 Sep 2015 16:46:37 +0000 (09:46 -0700)]
drm/i915/guc: Add host2guc notification for suspend and resume

Add host2guc interface to notify GuC power state changes when
enter or resume from power saving state.

v3: Move intel_guc_suspend to i915_drm_suspend for consistency.

v2: Add GuC suspend/resume to runtime suspend/resume too

v1: Change to a more flexible way when fill host to GuC scratch
data in order to remove hard coding.

Signed-off-by: Alex Dai <yu.dai@intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Skip CHV PHY asserts until PHY has been fully reset
Ville Syrjälä [Tue, 8 Sep 2015 15:05:45 +0000 (18:05 +0300)]
drm/i915: Skip CHV PHY asserts until PHY has been fully reset

The BIOS can leave the CHV display PHY in some odd state where
some of the LDOs/lanes won't power down fully when unused. This
will trigger a host of asserts that were added in:
30142273a3e83936fd7b45aa5339311a9295ca51 drm/i915: Add CHV PHY LDO power sanity checks
6669e39f95b5530ca8cb9137703ceb5e83e5d648 drm/i915: Add some CHV DPIO lane power state asserts

To avoid that, skip the asserts until the PHY power well has been
disabled at least once. That will fully reset the PHY, and once
brought back up, the dynamic power down features will work correctly.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S<deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't bypass LRC on CHV
Ville Syrjälä [Tue, 8 Sep 2015 15:05:44 +0000 (18:05 +0300)]
drm/i915: Don't bypass LRC on CHV

The docs are unclear as usual, so it's not clear whether LRC should be
bypassed, performed normally or GRC code should be used as the LRC code.
Some old docs stated that LRC bypass ought to be used, more recent ones
no longer say that. Some docs indicated that we could use GRC as the LRC
code on CHV, but the BIOS doesn't do that, so let's not do it either.

Besides to enable LRC bypass properly, I believe we should set the bit
already before deasserting cmnreset.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S<deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Call encoder hotplug for init and resume cases
Sonika Jindal [Mon, 5 Oct 2015 11:13:14 +0000 (16:43 +0530)]
drm/i915: Call encoder hotplug for init and resume cases

For all the encoders, call the hot_plug if it is registered.
This is required for connected boot and resume cases to generate
fake hpd resulting in reading of edid.
Removing the initial sdvo hot_plug call too so that it will be called
just once from this loop.

Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: unlock on error in i915_ppgtt_info()
Dan Carpenter [Fri, 2 Oct 2015 15:14:22 +0000 (18:14 +0300)]
drm/i915: unlock on error in i915_ppgtt_info()

We need to call intel_runtime_pm_put() and mutex_unlock() before
returning.

Fixes: 7cb5dff8d59d ('drm/i915: fix task reference leak in i915_debugfs.c')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Geliang Tang <geliangtang@163.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: Modify BXT BLC according to VBT changes
Sunil Kamath [Wed, 30 Sep 2015 17:04:57 +0000 (22:34 +0530)]
drm/i915/bxt: Modify BXT BLC according to VBT changes

Latest VBT mentions which set of registers will be used for BLC,
as controller number field. Making use of this field in BXT
BLC implementation. Also, the registers are used in case control
pin indicates display DDI. Adding a check for this.
According to Bspec, BLC_PWM_*_2 uses the display utility pin for output.
To use backlight 2, enable the utility pin with mode = PWM
   v2: Jani's review comments
   addressed
       - Add a prefix _ to BXT BLC registers definitions.
       - Add "bxt only" comment for u8 controller
       - Remove control_pin check for DDI controller
       - Check for valid controller values
       - Set pipe bits in UTIL_PIN_CTL
       - Enable/Disable UTIL_PIN_CTL in enable/disable_backlight()
       - If BLC 2 is used, read active_low_pwm from UTIL_PIN polarity
   Satheesh's review comment addressed
       - If UTIL PIN is already enabled, BIOS would have programmed it. No
       need to disable and enable again.
   v3: Jani's review comments
       - add UTIL_PIN_PIPE_MASK and UTIL_PIN_MODE_MASK
       - Disable UTIL_PIN if controller 1 is used
       - Mask out UTIL_PIN_PIPE_MASK and UTIL_PIN_MODE_MASK before enabling
       UTIL_PIN
       - check valid controller value in intel_bios.c
       - add backlight.util_pin_active_low
       - disable util pin before enabling
   v4: Change for BXT-PO branch:
   Stubbed unwanted definition which was existing before
   because of DC6 patch.
   UTIL_PIN_MODE_PWM     (0x1b << 24)

v2: Fixed Jani's review comment.

v3: Split the backight PWM frequency programming into separate patch,
    in cases BIOS doesn't initializes it.

v4: Starting afresh and not modifying existing state for backlight, as
    per Jani's recommendation.

v5: Fixed Jani's review comment wrt util pin enable

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
Signed-off-by: Sunil Kamath <sunil.kamath@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: get DSI pixelclock
Shashank Sharma [Tue, 1 Sep 2015 14:11:46 +0000 (19:41 +0530)]
drm/i915/bxt: get DSI pixelclock

BXT's DSI PLL is different from that of VLV. So this patch
adds a new function to get the current DSI pixel clock based
on the PLL divider ratio and lane count.

This function is required for intel_dsi_get_config() function.

v2: Fixed Jani's review comments.

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: get_hw_state for BXT
Shashank Sharma [Tue, 1 Sep 2015 14:11:45 +0000 (19:41 +0530)]
drm/i915/bxt: get_hw_state for BXT

Pick appropriate port control register (BXT or VLV), based on device.
Get the current hw state wrt Mipi port.

v2: Rebased on latest drm nightly branch.

v3: Removed the GET_DSI_PORT_CTRL Macro for consistency with earlier
    implementations as per Jani's suggestion.

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: DSI disable and post-disable
Shashank Sharma [Tue, 1 Sep 2015 14:11:44 +0000 (19:41 +0530)]
drm/i915/bxt: DSI disable and post-disable

This patch contains changes to support DSI disble sequence in BXT.
The changes are:
1. BXT specific changes in clear_device_ready function.
2. BXT specific changes in DSI disable and post-disable functions.
3. Add a new function to reset BXT Dphy clock and dividers
   (bxt_dsi_reset_clocks).
4. Moved some part of the vlv clock reset code, in a new function
   (vlv_dsi_reset_clocks) maintaining the exact same sequence.
5. Wrapper function to call corresponding reset clock function.

v2: Fixed Jani's review comments.

v3: Removed the GET_DSI_PORT_CTRL Macro for consistency with earlier
    implementations as per Jani's suggestion.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: Program Tx Rx and Dphy clocks
Shashank Sharma [Wed, 23 Sep 2015 17:57:17 +0000 (23:27 +0530)]
drm/i915/bxt: Program Tx Rx and Dphy clocks

BXT DSI clocks are different than previous platforms. So adding a
new function to program following clocks and dividers:
1. Program variable divider to generate input to Tx clock divider
   (Output value must be < 39.5Mhz)
2. Select divide by 2 option to get < 20Mhz for Tx clock
3. Program 8by3 divider to generate Rx clock

v2: Fixed Jani's review comments. Adjusted the Macro definition as
    per convention. Simplified the logic for bit definitions for
    MIPI PORT A and PORT C in same registers.

v3: Refactored the macros for TX, RX Escape and DPHY clocks as per
    Jani's suggestion.

v4: Addressed Jani's review comments.

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: DSI enable for BXT
Shashank Sharma [Tue, 1 Sep 2015 14:11:42 +0000 (19:41 +0530)]
drm/i915/bxt: DSI enable for BXT

This patch contains following changes:
1. MIPI device ready changes to support dsi_pre_enable. Changes
   are specific to BXT device ready sequence. Added check for
   ULPS mode(No effects on VLV).
2. Changes in dsi_enable to pick BXT port control register.
3. Changes in dsi_pre_enable to restrict DPIO programming for VLV

v2: Fixed Jani's review comments. Removed the changes in VLV/CHV
    code. Fixed the macros to get proper port offsets.

v3: Rebased on latest drm-nightly branch. Fixed Jani's review comments.

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: DSI encoder support in CRTC modeset
Shashank Sharma [Thu, 1 Oct 2015 16:53:49 +0000 (22:23 +0530)]
drm/i915/bxt: DSI encoder support in CRTC modeset

SKL and BXT qualifies the HAS_DDI() check, and hence haswell
modeset functions are re-used for modeset sequence. But DDI
interface doesn't include support for DSI.
This patch adds:
1. cases for DSI encoder, in those modeset functions and allows
   a CRTC modeset
2. Adds call to pre_pll enabled from CRTC modeset function. Nothing
   needs to be done as such in CRTC for DSI encoder, as PLL, clock
   and and transcoder programming will be taken care in encoder's
   pre_enable and pre_pll_enable function.

v2: Fixed Jani's review comments. Added INVALID_PORT for non DDI
    encoder like DSI for platforms having HAS_DDI as true.

v3: Rebased on latest drm-nightly branch. Added a WARN_ON for invalid
    encoder.

v4: WARN_ON for invalid encoder is refactored as per Jani's suggestion.
    Fixed the sequence for pre_pll_enable.

v5: Protected DDI code paths in case of DSI encoder calls.

Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: rename INSTDONE1 to GEN4_INSTDONE1
Imre Deak [Wed, 30 Sep 2015 20:00:44 +0000 (23:00 +0300)]
drm/i915: rename INSTDONE1 to GEN4_INSTDONE1

This register was added on GEN4, by the name INSTDONE_1 whereas the GEN6
specification calls it INSTDONE_2. Keep the original name with a
platform prefix to make it clearer which INSTDONE register instance this
is. Also add a comment about the SNB alternative name.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: rename INSTDONE to GEN2_INSTDONE
Imre Deak [Wed, 30 Sep 2015 20:00:43 +0000 (23:00 +0300)]
drm/i915: rename INSTDONE to GEN2_INSTDONE

We have a bunch of INSTDONE registers for different platforms and
purposes and it's not immediately clear which instance they are just by
looking at the register name. This one was added on GEN2, where it was
the only INSTDONE register, so mark it as such.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: remove duplicate names for the render ring INSTDONE register
Imre Deak [Wed, 30 Sep 2015 20:00:42 +0000 (23:00 +0300)]
drm/i915: remove duplicate names for the render ring INSTDONE register

We use 3 different names to refer to the same render ring INSTDONE
register. This can be confusing when comparing two parts of the code
accessing the register via different names. Although the GEN4 version's
layout is different, we treat it the same way as the GEN7+ version, in
that we simply read it out during error capture. So remove the
duplicates and leave a comment about the GEN4 difference.

Note that there is also a GEN2 version of this register, but that's on a
different address so not handled in this patch.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Wa32bitGeneralStateOffset & Wa32bitInstructionBaseOffset
Michel Thierry [Thu, 1 Oct 2015 12:33:57 +0000 (13:33 +0100)]
drm/i915: Wa32bitGeneralStateOffset & Wa32bitInstructionBaseOffset

There are some allocations that must be only referenced by 32-bit
offsets. To limit the chances of having the first 4GB already full,
objects not requiring this workaround use DRM_MM_SEARCH_BELOW/
DRM_MM_CREATE_TOP flags

In specific, any resource used with flat/heapless (0x00000000-0xfffff000)
General State Heap (GSH) or Instruction State Heap (ISH) must be in a
32-bit range, because the General State Offset and Instruction State
Offset are limited to 32-bits.

Objects must have EXEC_OBJECT_SUPPORTS_48B_ADDRESS flag to indicate if
they can be allocated above the 32-bit address range. To limit the
chances of having the first 4GB already full, objects will use
DRM_MM_SEARCH_BELOW + DRM_MM_CREATE_TOP flags when possible.

The libdrm user of the EXEC_OBJECT_SUPPORTS_48B_ADDRESS flag is here:
http://lists.freedesktop.org/archives/intel-gfx/2015-September/075836.html

v2: Changed flag logic from neeeds_32b, to supports_48b.
v3: Moved 48-bit support flag back to exec_object. (Chris, Daniel)
v4: Split pin flags into PIN_ZONE_4G and PIN_HIGH; update PIN_OFFSET_MASK
to use last PIN_ defined instead of hard-coded value; use correct limit
check in eb_vma_misplaced. (Chris)
v5: Don't touch PIN_OFFSET_MASK and update workaround comment (Chris)
v6: Apply pin-high for ggtt too (Chris)
v7: Handle simultaneous pin-high and pin-mappable end correctly (Akash)
    Fix check for entries currently using +4GB addresses, use min_t and
    other polish in object_bind_to_vm (Chris)
v8: Commit message updated to point to libdrm patch.
v9: vmas are allocated in the correct ozone, so only check flag when the
    vma has not been allocated. (Chris)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v4)
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/guc: Don't forward flip interrupts to GuC
Sagar Arun Kamble [Wed, 30 Sep 2015 16:57:37 +0000 (09:57 -0700)]
drm/i915/guc: Don't forward flip interrupts to GuC

Due to flip interrupts GuC stays awake always and GT does not enter
RC6. Do not route those interrupts to GuC for now. Driver won't touch
DE_GUCRMR register and leave it as what default value.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Signed-off-by: Alex Dai <yu.dai@intel.com>
Reviewed-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: s/GET_CFG_CR1_REG/DPLL_CFGCR1/ etc.
Ville Syrjälä [Wed, 30 Sep 2015 14:06:43 +0000 (17:06 +0300)]
drm/i915: s/GET_CFG_CR1_REG/DPLL_CFGCR1/ etc.

v2: Use SKL_DPLLx symbolic names instead of raw numbers

Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Calculate watermark configuration during atomic check (v2)
Matt Roper [Thu, 24 Sep 2015 22:53:18 +0000 (15:53 -0700)]
drm/i915: Calculate watermark configuration during atomic check (v2)

v2: Don't forget to actually check the cstate->active value when
    tallying up the number of active CRTC's.  (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Don't set plane visible during HW readout if CRTC is off
Matt Roper [Thu, 24 Sep 2015 22:53:17 +0000 (15:53 -0700)]
drm/i915: Don't set plane visible during HW readout if CRTC is off

We already ensure that pstate->visible = false when crtc->active = false
during runtime programming; make sure we follow the same logic when
reading out initial hardware state.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Calculate ILK-style watermarks during atomic check (v3)
Matt Roper [Thu, 24 Sep 2015 22:53:16 +0000 (15:53 -0700)]
drm/i915: Calculate ILK-style watermarks during atomic check (v3)

Calculate pipe watermarks during atomic calculation phase, based on the
contents of the atomic transaction's state structure.  We still program
the watermarks at the same time we did before, but the computation now
happens much earlier.

While this patch isn't too exciting by itself, it paves the way for
future patches.  The eventual goal (which will be realized in future
patches in this series) is to calculate multiple sets up watermark
values up front, and then program them at different times (pre- vs
post-vblank) on the platforms that need a two-step watermark update.

While we're at it, s/intel_compute_pipe_wm/ilk_compute_pipe_wm/ since
this function only applies to ILK-style watermarks and we have a
completely different function for SKL-style watermarks.

Note that the original code had a memcmp() in ilk_update_wm() to avoid
calling ilk_program_watermarks() if the watermarks hadn't changed.  This
memcmp vanishes here, which means we may do some unnecessary result
generation and merging in cases where watermarks didn't change, but the
lower-level function ilk_write_wm_values already makes sure that we
don't actually try to program the watermark registers again.

v2: Squash a few commits from the original series together; no longer
    leave pre-calculated wm's in a separate temporary structure since
    it's easier to follow the logic if we just cut over to using the
    pre-calculated values directly.

v3:
 - Pass intel_crtc instead of drm_crtc to .compute_pipe_wm() entrypoint
   and use intel_atomic_get_crtc_state() to avoid need for extra
   casting.  (Ander)
 - Drop unused intel_check_crtc() function prototype.  (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Calculate pipe watermarks into CRTC state (v3)
Matt Roper [Thu, 24 Sep 2015 22:53:15 +0000 (15:53 -0700)]
drm/i915: Calculate pipe watermarks into CRTC state (v3)

A future patch will calculate these during the atomic 'check' phase
rather than at WM programming time, so let's store the watermark
values we're planning to use in the CRTC state; the values actually
active on the hardware remains in intel_crtc.

While we're at it, do some minor restructuring to keep ILK and SKL
values in a union.

v2: Don't move cxsr_allowed to state (Maarten)

v3: Only calculate watermarks in state.  Still keep active watermarks in
    intel_crtc itself.  (Ville)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Refactor ilk_update_wm (v3)
Ville Syrjälä [Thu, 24 Sep 2015 22:53:14 +0000 (15:53 -0700)]
drm/i915: Refactor ilk_update_wm (v3)

Split ilk_update_wm() into two parts; one doing the programming
and the other the calculations.

v2: Fix typo in commit message

v3 (by Matt): Heavily rebased for current codebase.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Drop intel_update_sprite_watermarks
Matt Roper [Thu, 24 Sep 2015 22:53:13 +0000 (15:53 -0700)]
drm/i915: Drop intel_update_sprite_watermarks

The only platform that still has an update_sprite_wm entrypoint is SKL;
on SKL, intel_update_sprite_watermarks just updates intel_plane->wm and
then performs a regular watermark update.  However intel_plane->wm is
only used to update a couple fields in intel_wm_config, and those fields
are never used by the SKL code, so on SKL an update_sprite_wm is
effectively identical to an update_wm call.  Since we're already
ensuring that the regular intel_update_wm is called any time we'd try to
call intel_update_sprite_watermarks, the whole call is redundant and can
be dropped.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/ivb: Move WaCxSRDisabledForSpriteScaling w/a to atomic check
Matt Roper [Thu, 24 Sep 2015 22:53:12 +0000 (15:53 -0700)]
drm/i915/ivb: Move WaCxSRDisabledForSpriteScaling w/a to atomic check

Determine whether we need to apply this workaround at atomic check time
and just set a flag that will be used by the main watermark update
routine.

Moving this workaround into the atomic framework reduces
ilk_update_sprite_wm() to just a standard watermark update, so drop it
completely and just ensure that ilk_update_wm() is called whenever a
sprite plane is updated in a way that would affect watermarks.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl: Eliminate usage of pipe_wm_parameters from SKL-style WM (v3)
Matt Roper [Thu, 24 Sep 2015 22:53:11 +0000 (15:53 -0700)]
drm/i915/skl: Eliminate usage of pipe_wm_parameters from SKL-style WM (v3)

Just pull the info out of the state structures rather than staging
it in an additional set of structures.  To make this more
straightforward, we change the signature of several internal WM
functions to take the crtc state as a parameter.

v2:
 - Don't forget to skip cursor planes on a loop in the DDB allocation
   function to match original behavior.  (Ander)
 - Change a use of intel_crtc->active to cstate->active.  They should
   be identical, but it's better to be consistent.  (Ander)
 - Rework more function signatures to pass states rather than crtc for
   consistency. (Ander)

v3:
  - Add missing "+ 1" to skl_wm_plane_id()'s 'overlay' case. (Maarten)
  - Packed formats should pass '0' to drm_format_plane_cpp(), not 1.
    (Maarten)
  - Drop unwanted WARN_ON() for disabled planes when calculating data
    rate for SKL.  (Maarten)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/skl: Simplify wm structures slightly (v2)
Matt Roper [Thu, 24 Sep 2015 22:53:10 +0000 (15:53 -0700)]
drm/i915/skl: Simplify wm structures slightly (v2)

A bunch of SKL watermark-related structures have the cursor plane as a
separate entry from the rest of the planes.  Since a previous patch
updated I915_MAX_PLANES such that those plane arrays now have a slot for
the cursor, update the code to use the new slot in the existing plane
arrays and kill off the cursor-specific structures.

There shouldn't be any functional change here; this is just shuffling
around how the data is stored in some of the data structures.  The whole
patch is generated with Coccinelle via the following semantic patch:

        @@ struct skl_pipe_wm_parameters WMP; @@
        - WMP.cursor
        + WMP.plane[PLANE_CURSOR]

        @@ struct skl_pipe_wm_parameters *WMP; @@
        - WMP->cursor
        + WMP->plane[PLANE_CURSOR]

        @@ @@
        struct skl_pipe_wm_parameters {
        ...
        - struct intel_plane_wm_parameters cursor;
        ...
        };

        @@
        struct skl_ddb_allocation DDB;
        expression E;
        @@
        - DDB.cursor[E]
        + DDB.plane[E][PLANE_CURSOR]

        @@
        struct skl_ddb_allocation *DDB;
        expression E;
        @@
        - DDB->cursor[E]
        + DDB->plane[E][PLANE_CURSOR]

        @@ @@
        struct skl_ddb_allocation {
        ...
        - struct skl_ddb_entry cursor[I915_MAX_PIPES];
        ...
        };

        @@
        struct skl_wm_values WMV;
        expression E1, E2;
        @@
        (
        - WMV.cursor[E1][E2]
        + WMV.plane[E1][PLANE_CURSOR][E2]
        |
        - WMV.cursor_trans[E1]
        + WMV.plane_trans[E1][PLANE_CURSOR]
        )

        @@
        struct skl_wm_values *WMV;
        expression E1, E2;
        @@
        (
        - WMV->cursor[E1][E2]
        + WMV->plane[E1][PLANE_CURSOR][E2]
        |
        - WMV->cursor_trans[E1]
        + WMV->plane_trans[E1][PLANE_CURSOR]
        )

        @@ @@
        struct skl_wm_values {
        ...
        - uint32_t cursor[I915_MAX_PIPES][8];
        ...
        - uint32_t cursor_trans[I915_MAX_PIPES];
        ...
        };

        @@ struct skl_wm_level WML; @@
        (
        - WML.cursor_en
        + WML.plane_en[PLANE_CURSOR]
        |
        - WML.cursor_res_b
        + WML.plane_res_b[PLANE_CURSOR]
        |
        - WML.cursor_res_l
        + WML.plane_res_l[PLANE_CURSOR]
        )

        @@ struct skl_wm_level *WML; @@
        (
        - WML->cursor_en
        + WML->plane_en[PLANE_CURSOR]
        |
        - WML->cursor_res_b
        + WML->plane_res_b[PLANE_CURSOR]
        |
        - WML->cursor_res_l
        + WML->plane_res_l[PLANE_CURSOR]
        )

        @@ @@
        struct skl_wm_level {
        ...
        - bool cursor_en;
        ...
        - uint16_t cursor_res_b;
        - uint8_t cursor_res_l;
        ...
        };

v2: Use a PLANE_CURSOR enum entry rather than making the code reference
    I915_MAX_PLANES or I915_MAX_PLANES+1, which was confusing.  (Ander)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Determine I915_MAX_PLANES from plane enum
Matt Roper [Thu, 24 Sep 2015 22:53:09 +0000 (15:53 -0700)]
drm/i915: Determine I915_MAX_PLANES from plane enum

Let the compiler figure out what I915_MAX_PLANES is from 'enum plane' so
that we don't need a separate #define.

While we're at it, add the cursor plane to the enum.  This will cause
I915_MAX_PLANES to now include the cursor plane in its count (it didn't
previously).   This change is safe since we currently only use this
value in array declarations (never in the actual code logic); we just
wind up allocating slightly more memory than we need to.  A followup
patch will cause various parts of the code to start using the extra
array element where appropriate.

(This patch probably should have been squashed with the followup patch,
but I couldn't figure out how to get Coccinelle to modify enum
declarations...)

Suggested-by: Ander Conselvan De Oliveira <conselvan2@gmail.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
Matt Roper [Thu, 24 Sep 2015 22:53:08 +0000 (15:53 -0700)]
drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)

Just pull the info out of the CRTC state structure rather than staging
it in an additional structure.

Note that we use cstate->active rather than intel_crtc->active which may
appear to be a change in behavior.  However since we're no longer trying
to recalculate watermarks during the "pipe off" stage of a modeset,
intel_crtc->active and cstate->active should always be identical when
watermarks are calculated (at least for ILK-style platforms).

v2: Clarify reasoning for cstate->active and add a WARN_ON to the code
    to assert that it really is always identical to intel_crtc->active
    as expected.

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Eliminate usage of plane_wm_parameters from ILK-style WM code (v2)
Matt Roper [Thu, 24 Sep 2015 22:53:07 +0000 (15:53 -0700)]
drm/i915: Eliminate usage of plane_wm_parameters from ILK-style WM code (v2)

Just pull the info out of the plane state structure rather than staging
it in an additional structure.

v2: Add 'visible' condition to sprites_scaled so that we don't limit the
    WM level when the sprite isn't enabled.  (Ville)

Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by(v1): Ander Conselvan de Oliveira <conselvan2@gmail.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Drop redundant watermark programming
Matt Roper [Thu, 24 Sep 2015 22:53:06 +0000 (15:53 -0700)]
drm/i915: Drop redundant watermark programming

In commit

        commit e4ca061275ec6a48b66c6edebe08644e666994c0
        Author: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
        Date:   Wed Jul 8 15:31:52 2015 +0200

            drm/i915: Don't forget to mark crtc as inactive after disable

we added extra watermark updates to all of the .crtc_disable()
entrypoints to avoid problems problems with system resume on SKL.  Those
disable entrypoints are currently called in just two places in the
driver: intel_atomic_commit (i.e., during a modeset) and
intel_crtc_disable_noatomic (which is called during hardware readout).
It seems that this extra watermark recalculation should only be
important in the latter case (which happens during a resume operation);
the former case should always have appropriate watermark programming
happening at other points in the modeset sequence.

Let's move the watermark update out of the .crtc_disable() entrypoints
and place it directly in intel_crtc_disable_noatomic() so that it only
happens on S3 resume and not during a regular modeset (since the
existing watermark handling should properly update watermarks during
normal atomic commits).

Cc: Patrik Jakobsson <patrik.jakobsson@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/bxt: fix RC6 residency time calculation
Imre Deak [Tue, 29 Sep 2015 13:28:46 +0000 (16:28 +0300)]
drm/i915/bxt: fix RC6 residency time calculation

The RC6 residency time unit is 833.33ns on BXT according to the
specification, so update the calculation accordingly. Use the same way
as CHV/VLV to divide by the corresponding frequency, as I think this is
the more natural unit for what the HW does internally.

v2:
- add missing IS_BROXTON check (Ville)

Testcase: igt/pm_rc6_residency
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915/guc: Media domain bit needed when notify GuC rc6 state
Alex Dai [Fri, 25 Sep 2015 18:46:56 +0000 (11:46 -0700)]
drm/i915/guc: Media domain bit needed when notify GuC rc6 state

GuC expects two bits for Render and Media domain separately when
driver sends data via host2guc SAMPLE_FORCEWAKE. Bit 0 is for
Render and bit 1 is for Media domain.

v2: Keep sync with code for WaRsDoubleRc6WrlWithCoarsePowerGating

v1: Add parameters definition to avoid magic value

Signed-off-by: Alex Dai <yu.dai@intel.com>
Reviewed-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: s/_TRANSA_CHICKEN/TRANS_CHICKEN(PIPE_A)/
Ville Syrjälä [Fri, 18 Sep 2015 17:03:31 +0000 (20:03 +0300)]
drm/i915: s/_TRANSA_CHICKEN/TRANS_CHICKEN(PIPE_A)/

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: s/_FDI_RXA_.../FDI_RX_...(PIPE_A)/
Ville Syrjälä [Fri, 18 Sep 2015 17:03:30 +0000 (20:03 +0300)]
drm/i915: s/_FDI_RXA_.../FDI_RX_...(PIPE_A)/

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
9 years agodrm/i915: Add missing const to audio_rate_need_prog()
Takashi Iwai [Wed, 30 Sep 2015 07:39:01 +0000 (09:39 +0200)]
drm/i915: Add missing const to audio_rate_need_prog()

The lack of const leads to a compile warning after merging i915
upstream tree:
   drivers/gpu/drm/i915/intel_audio.c:147:13: note: expected 'struct drm_display_mode *' but argument is of type 'const struct drm_display_mode *'

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
9 years agodrm/i915/bdw: Check for slice, subslice and EU count for BDW
Łukasz Daniluk [Fri, 25 Sep 2015 09:54:58 +0000 (11:54 +0200)]
drm/i915/bdw: Check for slice, subslice and EU count for BDW

Added checks for available slices, subslices and EUs for Broadwell. This
information is filled in intel_device_info and is available to user with
GET_PARAM.
Added checks for enabled slices, subslices and EU for Broadwell. This
information is based on available counts but takes power gated slices
into account. It can be read in debugfs.
Introduce new register defines that contain information on slices on
Broadwell.

v2:
- Introduce GT_SLICE_INFO register
- Change Broadwell sseu_device_status function to use GT_SLICE_INFO
  register instead of RPCS register
- Undo removal of dev_priv variables in Cherryview and Gen9
  sseu_device_satus functions

v3:
- Fix style issues

v4:
- Corrected comment
- Reverted reordering of defines

Cc: Jeff Mcgee <jeff.mcgee@intel.com>
Cc: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Łukasz Daniluk <lukasz.daniluk@intel.com>
Reviewed-by: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>