Commit graph

1907 commits

Author SHA1 Message Date
Lionel Landwerlin
421fa01d64 anv/android: mark gralloc allocated BOs as external
Allocating through Gralloc implies buffers are going to be used
outside the driver. We have special MOCS settings for external BOs and
we probably want to use them here too.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: a1220e7311 ("anv/android: Set the BO flags in bo_cache_import (v2)")
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
2018-11-06 15:28:07 +00:00
Lionel Landwerlin
b43f955037 anv: stub internal android code
This reduces the amount of #ifdef ANDROID we'll have to have inside
the driver. Potentially offering better coverage of the android
extensions.

v2: Move anv_android.h include before anv_entrypoints.h (Tapani)
    Fix autotools android build (Lionel)

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2018-11-06 15:28:07 +00:00
Anuj Phogat
1c140470ef anv/icl: Disable prefetching of sampler state entries
WA_1606682166:
Incorrect TDL's SSP address shift in SARB for 16:6 & 18:8 modes.
Disable the Sampler state prefetch functionality in the SARB by
programming 0xB000[30] to '1'. This is to be done at boot time and
the feature must remain disabled permanently.

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2018-11-02 08:34:33 -07:00
Anuj Phogat
13c955182f anv/icl: Set Error Detection Behavior Control Bit in L3CNTLREG
The default setting of this bit is not the desirable behavior.
WA_1406697149

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-11-01 12:00:23 -07:00
Jason Ekstrand
d3a0d8b750 intel/compiler: Stop assuming the entrypoint is called "main"
This isn't true for Vulkan so we have to whack it to "main" in anv which
is silly.  Instead of walking the list of functions and asserting that
everything is named "main" and hoping there's only one function named
"main", just use the nir_shader_get_entrypoint() helper which has better
assertions anyway.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2018-10-30 20:14:52 -05:00
Danylo Piliaiev
00fc56a68d anv: Disable dual source blending when shader doesn't support it on gen8+
Dual source blending behaviour is undefined when shader doesn't
have second color output.

 "If SRC1 is included in a src/dst blend factor and
  a DualSource RT Write message is not used, results
  are UNDEFINED. (This reflects the same restriction in DX APIs,
  where undefined results are produced if “o1” is not written
  by a PS – there are no default values defined)."

Dismissing fragment in such situation leads to a hang on gen8+
if depth test in enabled.

Since blending cannot be gracefully fixed in such case and the result
is undefined - blending is simply disabled.

v2 (Jason Ekstrand):
 - Apply the workaround to each individual entry
 - Emit a warning through debug_report

Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2018-10-30 12:59:53 -07:00
Jason Ekstrand
f48b742289 anv: Bump the advertised patch version to 90
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-30 11:43:43 -05:00
Eric Engestrom
2be1f9ceba anv: add missing meson build dependency
Fixes: e4538b93f5 "anv: Implement VK_KHR_driver_properties"
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
2018-10-29 16:39:07 +00:00
Jason Ekstrand
1bd4f8fefc anv: Use absolute timeouts in wait_for_bo_fences
We were previously using relative timeouts and decrementing the
user-provided timeout as we waited.  Instead, this commit refactors
things to use absolute timeouts throughout.  This should fix a subtle
bug in the waitAll case where we aren't decrementing the timeout after a
successful GPU wait.  Since pthread_cond_timedwait already takes an
absolute timeout, it's also significantly simpler.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-27 16:18:33 -05:00
Jason Ekstrand
cbd4468695 anv: Flag semaphore BOs as external
It probably doesn't actually break anything but it does cause some
assertions in debug builds.

Fixes: 7a89a0d9ed "anv: Use separate MOCS settings for external BOs"
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-27 00:02:32 -05:00
Jason Ekstrand
663a113700 anv: Improve the asserts in anv_buffer_get_range
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-27 00:02:32 -05:00
Jason Ekstrand
aa02d7e878 Revert "anv/skylake: disable ForceThreadDispatchEnable"
This reverts commit 0fa9e6d7b3.  The real
issue appears to have been that HiZ ops don't like having WM thread
dispatch force-enabled.  The previous commit fixes that problem so we
can go back to using the ForceThreadDispatchEnable bit even on SKL+.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2018-10-26 16:39:47 -05:00
Jason Ekstrand
07eb8e7466 anv: Return VK_ERROR_DEVICE_LOST from anv_device_set_lost
This lets us get rid of a bunch of duplicated error messages.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2018-10-26 13:27:21 -05:00
Jason Ekstrand
ade22ae1ac anv/util: Split a vk_errorv helper out of vk_errorf
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2018-10-26 13:27:21 -05:00
Eric Engestrom
738f0f789b vulkan: drop always-true param
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-10-26 18:33:11 +01:00
Jason Ekstrand
28bb6abd1d nir/validate: Print when the validation failed
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
2018-10-26 11:45:29 -05:00
Jason Ekstrand
292ebdbf98 anv: Handle the device loss abort in anv_device_set_lost
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2018-10-26 08:40:23 -05:00
Jason Ekstrand
cd0960b430 anv: Add helpers for setting/checking device lost
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2018-10-26 08:40:21 -05:00
Jason Ekstrand
319ff6f1ad anv: Provide a error message with a DEVICE_LOST
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2018-10-26 08:40:10 -05:00
Alex Smith
3bd239f71d anv: Fix sanitization of stencil state when the depth test is disabled
When depth testing is disabled, we shouldn't pay attention to the
specified depthCompareOp, and just treat it as always passing. Before,
if the depth test is disabled, but depthCompareOp is VK_COMPARE_OP_NEVER
(e.g. from the app having zero-initialized the structure), then
sanitize_stencil_face() would have incorrectly changed passOp to
VK_STENCIL_OP_KEEP.

v2: Roll the depthTestEnable check into the ds_aspect check below since
    they now both do the same thing.

Fixes: 028e1137e6 "anv/pipeline: Be smarter about depth/stencil state"
Signed-off-by: Alex Smith <asmith@feralinteractive.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-10-26 10:25:40 +01:00
Eric Engestrom
e27902a261 util: use C99 declaration in the for-loop set_foreach() macro
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
2018-10-25 12:43:18 +01:00
Eric Engestrom
bb84fa146f util: use C99 declaration in the for-loop hash_table_foreach() macro
Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
2018-10-25 12:43:18 +01:00
Eric Engestrom
edc06dd533 anv: move variable to proper scope and mark as MAYBE_UNUSED
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-24 18:16:20 +01:00
Eric Engestrom
ed5d65a6a1 anv: use snprintf() instead of memset()+strcpy()
snprintf() guarantees that it will not write more chars than allowed,
and that the string will be null-terminated, without the need to fill
the whole thing with zeroes to begin with.

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-24 18:15:56 +01:00
Eric Engestrom
33d757096d anv: drop unused includes
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-24 18:15:05 +01:00
Alex Smith
6c56c1fbd4 anv: Allow presenting via a different GPU
anv_GetPhysicalDeviceSurfaceSupportKHR will already return success for
this, but anv_GetPhysicalDevice{Xcb,Xlib}PresentationSupportKHR do not.
Apps which check for presentation support via the latter (all Feral
Vulkan games at least) will therefore fail.

This allows me to render on an Intel GPU and present to a display
connected to an AMD card (tested HD 530 + Vega 64).

v2: Rebase on current master.

Signed-off-by: Alex Smith <asmith@feralinteractive.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-10-24 09:40:02 +01:00
Jason Ekstrand
ca4e465f7d anv,radv: Trivially expose two new VK_GOOGLE extensions
This patch exposes support for the following two extensions:

 * VK_GOOGLE_decorate_string
 * VK_GOOGLE_hlsl_functionality1

There's nothing for the driver to do; it's all handled in spirv_to_nir.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107971
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-10-22 10:50:20 -05:00
Jason Ekstrand
0d380af809 anv: Define trampolines as the weak functions
Instead of having weak references to the anv functions and separate
trampoline functions with their own dispatch table, just make the
trampoline functions weak.  This gets rid of a dispatch table and
potentially lets the compiler delete the unused weak function.  The
end result is a reduction in the .text section of 5.7K and a reduction
in the .data section of 1.4K.

Before:

   text	   data	    bss	    dec	    hex	filename
3190329	 282232	   8960	3481521	 351fb1	_install/lib64/libvulkan_intel.so

After:

   text	   data	    bss	    dec	    hex	filename
3184548	 280792	   8960	3474300	 35037c	_install/lib64/libvulkan_intel.so

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-19 11:52:00 -05:00
Jason Ekstrand
8c0b9fdfa1 Revert "anv: Stop generating weak references for instance entrypoints"
This reverts commit 00bb42105d.  It was
not as well thought out as I had intended and broke the build when
VK_KHR_display is disabled in the build.
2018-10-18 15:36:26 -05:00
Jason Ekstrand
baa38c144f vulkan/wsi: Use VK_EXT_pci_bus_info for DRM fd matching
This lets us avoid passing the DRM fd around all over the place and gets
us closer to layer utopia.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
2018-10-18 11:29:00 -05:00
Jason Ekstrand
00bb42105d anv: Stop generating weak references for instance entrypoints
We don't need weak references to instance entrypoints because we never
have more than one of each so we don't need the NULL fall-back.  This
also helps us avoid forgetting things because we now get link errors for
missing instance entrypoints.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-18 09:17:39 -05:00
Jason Ekstrand
7c65cf9844 vulkan/wsi: Implement GetPhysicalDevicePresentRectanglesKHR
This got missed during 1.1 enabling because it was defined as an
interaction between device groups and WSI and it wasn't obvious it was
in the delta.

The idea behind it is that it's supposed to provide a hint to the
application in a multi-GPU setup to indicate which regions of the screen
are being scanned out by which GPU so a multi-device split-screen
rendering application can render each part of the screen on the GPU that
will be presenting it and avoid extra bus traffic between GPUs.  On a
single-GPU setup or one which doesn't support this present mode, we need
to do something.  We choose to return the window size (or a max-size
rect) if the compositor, X server, or crtc is associated with the given
physical device and zero rectangles otherwise.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-18 09:17:39 -05:00
Jason Ekstrand
7629c00557 vulkan/wsi: Store the instance allocator in wsi_device
We already have wsi_device and we know the instance allocator at
wsi_device_init time so there's no need to pass it into the physical
device queries.  This also fixes a memory allocation domain bug that can
occur if CreateSwapchain gets called prior to any queries (not likely)
in which case the cached connection gets allocated off the device
instead of the instance.

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-18 09:17:39 -05:00
Keith Packard
67a2c1493c vulkan: Add VK_EXT_calibrated_timestamps extension (radv and anv) [v5]
Offers three clocks, device, clock monotonic and clock monotonic
raw. Could use some kernel support to reduce the deviation between
clock values.

v2:
	Ensure deviation is at least as big as the GPU time interval.

v3:
	Set device->lost when returning DEVICE_LOST.
	Use MAX2 and DIV_ROUND_UP instead of open coding these.
	Delete spurious TIMESTAMP in radv version.

	Suggested-by: Jason Ekstrand <jason@jlekstrand.net>
	Suggested-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>

v4:
	Add anv_gem_reg_read to anv_gem_stubs.c

	Suggested-by: Jason Ekstrand <jason@jlekstrand.net>

v5:
	Adjust maxDeviation computation to max(sampled_clock_period) +
	sample_interval.

	Suggested-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
	Suggested-by: Jason Ekstrand <jason@jlekstrand.net>

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-10-17 20:10:15 -07:00
Sergii Romantsov
0fa9e6d7b3 anv/skylake: disable ForceThreadDispatchEnable
On Skylake enabling of ForceThreadDispatchEnable causes gpu-hang.

-v2: enabling of  ForceThreadDispatchEnable is only for gen8, for
     gen9 and higher reverted enabling of PixelShaderHasUAV.

-v3 (Jason Ekstrand): Rework the comments a bit.

CC: Jason Ekstrand <jason.ekstrand@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107941
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107760
Fixes: 79270d2140 (anv: Stop setting 3DSTATE_PS_EXTRA::PixelShaderHasUAV)
Signed-off-by: Sergii Romantsov <sergii.romantsov@globallogic.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-10-16 13:20:51 -05:00
Lionel Landwerlin
322a919a41 anv: Implement VK_EXT_pci_bus_info
Even though the Intel GPU are always at the same PCI location, all the
info we need is already provided by libdrm. Let's be future proof.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-10-16 12:47:55 +01:00
Jason Ekstrand
e4c9bcd037 anv: Don't advertise ASTC support on BSW
Tested-by: Mark Janes <mark.a.janes@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
2018-10-15 16:55:25 -05:00
Jason Ekstrand
ae18c53ba6 anv: Split dispatch tables into device and instance
There's no reason why we need generate trampoline functions for instance
functions or carry N copies of the instance dispatch table around for
every hardware generation.  Splitting the tables and being more
conservative shaves about 34K off .text and about 4K off .data when
built with clang.

Before splitting dispatch tables:

   text	   data	    bss	    dec	    hex	filename
3224305	 286216	   8960	3519481	 35b3f9	_install/lib64/libvulkan_intel.so

After splitting dispatch tables:

   text	   data	    bss	    dec	    hex	filename
3190325	 282232	   8960	3481517	 351fad	_install/lib64/libvulkan_intel.so

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-15 13:30:24 -05:00
Nanley Chery
0ee0e0b6b9 anv: Clear WM_HZ_OP overrides in init_device_state
This is basically a port of commit,
3ade766684
("i965: Disable 3DSTATE_WM_HZ_OP fields.")

The BDW+ docs describe how to use the 3DSTATE_WM_HZ_OP instruction in
the section titled, "Optimized Depth Buffer Clear and/or Stencil Buffer
Clear." It mentions that the packet overrides GPU state for the clear
operation and needs to be reset to 0s to clear the overrides. Depending
on the kernel, we may not get a context with the GPU state for this
packet zeroed. Do it ourselves just in case.

Prevents a number of GPU hangs when running crucible on ICL. I tried to
get the exact number of hangs that occurs without this patch, but was
unsuccessful. The test machine became unresponsive before completing the
full run.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2018-10-11 16:31:08 -07:00
Jordan Justen
d18a0d955e
anv/gen9+: Initialize new fields in STATE_BASE_ADDRESS
Ref: 263b584d5e "i965/skl: Emit extra zeros in STATE_BASE_ADDRESS on Skylake."
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
2018-10-11 15:16:00 -07:00
Dave Airlie
29a7631986 anv: add missing unlock in error path.
Not going to matter, but be consistent.

Found by coverity

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Fixes: caf41c78c (anv/allocator: Support softpin in the BO cache)
2018-10-11 09:50:27 +10:00
Jason Ekstrand
f5bab06428 anv/batch_chain: Don't start a new BO just for BATCH_BUFFER_START
Previously, we just went ahead and emitted MI_BATCH_BUFFER_START as
normal.  If we are near enough to the end, this can cause us to start a
new BO just for the MI_BATCH_BUFFER_START which messes up chaining.  We
always reserve enough space at the end for an MI_BATCH_BUFFER_START so
we can just increment cmd_buffer->batch.end prior to emitting the
command.

Fixes: a0b133286a "anv/batch_chain: Simplify secondary batch return..."
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107926
Tested-by: Alex Smith <asmith@feralinteractive.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-03 09:03:12 -05:00
Jason Ekstrand
7a89a0d9ed anv: Use separate MOCS settings for external BOs
On Broadwell and above, we have to use different MOCS settings to allow
the kernel to take over and disable caching when needed for external
buffers.  On Broadwell, this is especially important because the kernel
can't disable eLLC so we have to do it in userspace.  We very badly
don't want to do that on everything so we need separate MOCS for
external and internal BOs.

In order to do this, we add an anv-specific BO flag for "external" and
use that to distinguish between buffers which may be shared with other
processes and/or display and those which are entirely internal.  That,
together with an anv_mocs_for_bo helper lets us choose the right MOCS
settings for each BO use.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99507
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-10-03 09:03:03 -05:00
Gabriel Majeri
f0b987646a anv: Ensure discreteQueuePriorities is at least 2
This is the minimum value according to the spec.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
2018-10-03 07:57:37 +02:00
Eric Engestrom
7b0752fb10 anv: suppress warning about unhandled image layout
Let's just be explicit that VK_NV_shading_rate_image is not supported.

Suggested-by: Jason Ekstrand <jason.ekstrand@intel.com>
Fixes: 6ee1709170 "vulkan: Update the XML and headers to 1.1.86"
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
2018-10-02 15:09:29 +01:00
Jason Ekstrand
e4538b93f5 anv: Implement VK_KHR_driver_properties
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-10-01 13:21:12 -05:00
Jordan Justen
ca1d3fc538
anv: If softpin is supported, use it with the hiz clear value bo
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
2018-09-26 10:21:23 -07:00
Jordan Justen
2a97390552
anv: s/batch/value_bo/ on anv_device_init_hiz_clear_batch
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
2018-09-26 10:21:23 -07:00
Jason Ekstrand
b3f477ef7a intel/isl: Add a unit suffixes to some struct fields and variables
I was about to make the claim to someone that every field in isl_surf
is either an enum or has explicit units.  Then I looked at isl_surf and
discovered this claim was wrong.  We should fix that.  This commit does
a few refactors:

 * Add _B suffixes to some struct fields
 * Add _B to some variables and parameters
 * Rename row_pitch_tiles -> row_pitch_tl

Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
2018-09-26 08:52:26 -05:00
Anuj Phogat
5eb173304b anv/icl: Set Enabled Texel Offset Precision Fix bit
h/w specification requires this bit to be always set.

Suggested-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2018-09-21 14:40:04 -07:00