mesa.git
9 years agomesa: Delete unused ICEIL().
Matt Turner [Sat, 20 Jun 2015 03:40:15 +0000 (20:40 -0700)]
mesa: Delete unused ICEIL().

Can't find any uses of it in git history.

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
9 years agoi965/fs: Don't mess up stride for uniform integer multiplication.
Matt Turner [Mon, 22 Jun 2015 17:59:33 +0000 (10:59 -0700)]
i965/fs: Don't mess up stride for uniform integer multiplication.

If the stride is 0, the source is a uniform and we should not modify the
stride.

Cc: "10.6" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91047
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
9 years agoegl/x11: Remove duplicate call to dri2_x11_add_configs_for_visuals
Boyan Ding [Sat, 13 Jun 2015 07:33:20 +0000 (15:33 +0800)]
egl/x11: Remove duplicate call to dri2_x11_add_configs_for_visuals

The call to dri2_x11_add_configs_for_visuals (previously
dri2_add_configs_for_visuals) was moved downwards in commit f8c5b8a1,
but appeared again in its original position after its rename in
d019cd81. Remove it.

Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Boyan Ding <boyan.j.ding@gmail.com>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Chad Versace <chad.versace@intel.com>
9 years agoi965/gen9: Don't use encrypted MOCS
Ben Widawsky [Wed, 17 Jun 2015 22:50:13 +0000 (15:50 -0700)]
i965/gen9: Don't use encrypted MOCS

On gen9+ MOCS is an index into a table. It is 7 bits, and AFAICT, bit 0 is for
doing encrypted reads.

I don't recall how I decided to do this for BXT. I don't know this patch was
ever needed, since it seems nothing is broken today on SKL. Furthermore, this
patch may no longer be needed because of the ongoing changes with MOCS setup. It
is what is being used/tested, so it's included in the series.

The chosen values are the old values left shifted. That was also an arbitrary
choice.

v2: Use shift in MOCS to make it clear what we're doing. (Ken)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
9 years agonv50,nvc0: make sure to pushbuf_refn before putting bo into pushbuf_data
Ilia Mirkin [Sun, 21 Jun 2015 23:03:35 +0000 (19:03 -0400)]
nv50,nvc0: make sure to pushbuf_refn before putting bo into pushbuf_data

Without first running the bo through pushbuf_refn, the nouveau drm
library will have uninitialized structures regarding this bo, and will
insert incorrect data.

This fixes supertuxkart 0.9 crash on start (where it ends up doing a lot
of indirect draws).

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
9 years agonvc0: always put all tfb bufs into bufctx
Ilia Mirkin [Sun, 21 Jun 2015 19:00:16 +0000 (15:00 -0400)]
nvc0: always put all tfb bufs into bufctx

Since we clear the TFB bufctx binding point above, we need to put all of
the active tfb's back in, even if they haven't changed since last time.
Otherwise the tfb may get moved into sysmem and the underlying mapping
will generate write errors.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
9 years agoglsl: binding point is a texture unit, which is a combined space
Ilia Mirkin [Tue, 23 Jun 2015 04:16:59 +0000 (00:16 -0400)]
glsl: binding point is a texture unit, which is a combined space

This fixes compilation failures in Dota 2 Reborn where a texture unit
binding point was used that was numerically higher than the max
per stage.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Timothy Arceri <t_arceri@yahoo.com.au>
Tested-by: Nick Sarnie <commendsarnex@gmail.com>
Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
9 years agoandroid: egl: do not link against libglapi
Emil Velikov [Fri, 19 Jun 2015 18:35:19 +0000 (19:35 +0100)]
android: egl: do not link against libglapi

The only reason we touch glapi is to dlopen it in order to:
 - make sure that the unresolved _glapi* symbols in the dri modules are
provided.
 - fetch glFlush() and use it at various stages in the dri2 driver.

Cc: Chih-Wei Huang <cwhuang@linux.org.tw>
Cc: Eric Anholt <eric@anholt.net>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agogbm: do not (over)link against libglapi.so
Emil Velikov [Fri, 19 Jun 2015 18:22:38 +0000 (19:22 +0100)]
gbm: do not (over)link against libglapi.so

The whole of GBM does not rely on even a single symbol from the GL
dispatch library, unsuprisingly. The only need for it comes from the
unresolved symbols in the DRI modules, which are now correctly handled
with Frank's commit.

Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agogbm: dlopen libglapi so gbm_create_device works
Frank Henigman [Thu, 6 Nov 2014 21:29:26 +0000 (16:29 -0500)]
gbm: dlopen libglapi so gbm_create_device works

Dri driver libs are not linked to pull in libglapi so gbm_create_device()
fails when it tries to dlopen them (unless the application is linked
with something that does pull in libglapi, like libGL).
Until dri drivers can be fixed properly, dlopen libglapi before trying
to dlopen them.

Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Frank Henigman <fjhenigman@google.com>
[Emil Velikov: Drop misleading bugzilla link, mention that libname differs]
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agoconfigure: drop unused variable GBM_BACKEND_DIRS
Emil Velikov [Fri, 19 Jun 2015 16:48:30 +0000 (17:48 +0100)]
configure: drop unused variable GBM_BACKEND_DIRS

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
9 years agoconfigure: error out when building libEGL without shared-glapi
Emil Velikov [Fri, 19 Jun 2015 16:46:41 +0000 (17:46 +0100)]
configure: error out when building libEGL without shared-glapi

The latter is a hard requirement and without it we'll error out later
on in the build.

Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
9 years agoconfigure: error out when building backend-less libEGL
Emil Velikov [Fri, 19 Jun 2015 16:44:02 +0000 (17:44 +0100)]
configure: error out when building backend-less libEGL

Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
9 years agodrivers/x11: drop unneeded HAVE_X11_DRIVER check
Emil Velikov [Fri, 19 Jun 2015 16:37:18 +0000 (17:37 +0100)]
drivers/x11: drop unneeded HAVE_X11_DRIVER check

Already handled in the Makefile which includes the drivers/x11 subdir.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
9 years agoconfigure: allow building shared-glapi powered libgl-xlib
Emil Velikov [Fri, 19 Jun 2015 18:43:23 +0000 (19:43 +0100)]
configure: allow building shared-glapi powered libgl-xlib

Cc: Brian Paul <brianp@vmware.com>
Cc: Adam Jackson <ajax@redhat.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Jose Fonseca <jfonseca@vmware.com>
9 years agotargets/libgl-xlib: fix the build against shared_glapi
Emil Velikov [Fri, 19 Jun 2015 16:30:13 +0000 (17:30 +0100)]
targets/libgl-xlib: fix the build against shared_glapi

Cc: Brian Paul <brianp@vmware.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Jose Fonseca <jfonseca@vmware.com>
9 years agodrivers/x11: fix the build against shared_glapi
Emil Velikov [Fri, 19 Jun 2015 16:28:25 +0000 (17:28 +0100)]
drivers/x11: fix the build against shared_glapi

Cc: Brian Paul <brianp@vmware.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Acked-by: Jose Fonseca <jfonseca@vmware.com>
9 years agoconfigure: warn about shared_glapi & xlib-glx only when both are set
Emil Velikov [Fri, 19 Jun 2015 16:19:46 +0000 (17:19 +0100)]
configure: warn about shared_glapi & xlib-glx only when both are set

Printing out the message when shared_glapi is disabled only leads to
confusion.

Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
9 years agoglapi: remap_helper.py: remove unused argument 'es'
Emil Velikov [Thu, 18 Jun 2015 22:30:34 +0000 (23:30 +0100)]
glapi: remap_helper.py: remove unused argument 'es'

Identical to the previous commit - unused by neither the Autotools,
Android or SCons build.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Dylan Baker <baker.dylan.c@gmail.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agoglapi: gl_table.py: remove unused variable 'es'
Emil Velikov [Thu, 18 Jun 2015 22:28:05 +0000 (23:28 +0100)]
glapi: gl_table.py: remove unused variable 'es'

None of the three build systems ever set it, as such we can clear things
up a bit.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Dylan Baker <baker.dylan.c@gmail.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agoegl: Use the loader_open_device() helper to do open with CLOEXEC
Derek Foreman [Wed, 17 Jun 2015 16:28:51 +0000 (11:28 -0500)]
egl: Use the loader_open_device() helper to do open with CLOEXEC

We've moved the open with CLOEXEC idiom into a helper function, so
call it instead of duplicating the code.

This also replaces a couple of opens that didn't properly do CLOEXEC.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agoglx: Use loader_open_device() helper
Derek Foreman [Wed, 17 Jun 2015 16:28:50 +0000 (11:28 -0500)]
glx: Use loader_open_device() helper

We've moved the open with CLOEXEC idiom into a helper function, so
call it instead of duplicating the code here.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agoloader: Rename drm_open_device() to loader_open_device() and share it
Derek Foreman [Wed, 17 Jun 2015 16:28:49 +0000 (11:28 -0500)]
loader: Rename drm_open_device() to loader_open_device() and share it

This is already our common idiom for opening files with CLOEXEC and
it's a little ugly, so let's share this one implementation.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agoegl/drm: Duplicate fd with F_DUPFD_CLOEXEC to prevent leak
Derek Foreman [Wed, 17 Jun 2015 16:28:48 +0000 (11:28 -0500)]
egl/drm: Duplicate fd with F_DUPFD_CLOEXEC to prevent leak

Replacing dup() with fcntl F_DUPFD_CLOEXEC creates the duplicate
file descriptor with CLOEXEC so it won't be leaked to child
processes if the process fork()s later.

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agodraw,tgsi: Assume TGSI_PROPERTY_GS_INVOCATIONS default of 1.
Jose Fonseca [Tue, 23 Jun 2015 11:18:06 +0000 (12:18 +0100)]
draw,tgsi: Assume TGSI_PROPERTY_GS_INVOCATIONS default of 1.

If the shader doesn't specify number of invocations, assume one.

This fixes geometry shaders on state trackers other than Mesa (and
probably graw tests too.)

Trivial.

9 years agoglsl: Specify the shader stage in linker errors due to too many in/outputs.
Jose Fonseca [Fri, 19 Jun 2015 12:53:46 +0000 (13:53 +0100)]
glsl: Specify the shader stage in linker errors due to too many in/outputs.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
9 years agodocs: update GL3 with softpipe/llvmpipe gpu_shader5 pieces.
Dave Airlie [Tue, 23 Jun 2015 05:55:30 +0000 (15:55 +1000)]
docs: update GL3 with softpipe/llvmpipe gpu_shader5 pieces.

This just updates the bits I've added in the previous few patches.

Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agodraw/gallivm: add invocation ID support for llvmpipe.
Dave Airlie [Mon, 22 Jun 2015 03:59:25 +0000 (13:59 +1000)]
draw/gallivm: add invocation ID support for llvmpipe.

This extends the draw code to add support for invocations.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agodraw/tgsi: implement geom shader invocation support.
Dave Airlie [Wed, 20 May 2015 00:32:32 +0000 (10:32 +1000)]
draw/tgsi: implement geom shader invocation support.

This is just for softpipe, llvmpipe won't work without
some changes.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agotgsi: handle indirect sampler arrays. (v2)
Dave Airlie [Wed, 27 May 2015 08:37:17 +0000 (18:37 +1000)]
tgsi: handle indirect sampler arrays. (v2)

This is required for ARB_gpu_shader5 support in softpipe.

v2: add support to txd/txf/txq paths.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agonir: Allow vec2/vec3/vec4 instructions in the select peephole pass.
Kenneth Graunke [Wed, 10 Jun 2015 07:52:07 +0000 (00:52 -0700)]
nir: Allow vec2/vec3/vec4 instructions in the select peephole pass.

These are basically just moves, so they should be safe as well.

When disabling i965's GLSL IR level scalarizer (channel expressions)
pass, I started seeing NIR code like this:

        if ssa_21 {
                block block_1:
                /* preds: block_0 */
                vec4 ssa_120 = vec4 ssa_82, ssa_83, ssa_84, ssa_30
                /* succs: block_3 */
        } else {
                block block_2:
                /* preds: block_0 */
                /* succs: block_3 */
        }
        block block_3:
        /* preds: block_1 block_2 */
        vec4 ssa_33 = phi block_1: ssa_120, block_2: ssa_2

Previously, the GLSL IR scalarizer pass would break the vec4 into a
series of fmovs, which were allowed by the peephole pass.  But with
the vec4 operation, they were not.  We want to keep getting selects.

Normal i965 on Broadwell:
instructions in affected programs:     200 -> 176 (-12.00%)
helped:                                4

With brw_fs_channel_expressions() disabled:
instructions in affected programs:     1832 -> 1646 (-10.15%)
helped:                                30

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
9 years agoi965: Add and fix comments in brw_vue_map.c.
Kenneth Graunke [Fri, 15 May 2015 16:58:42 +0000 (09:58 -0700)]
i965: Add and fix comments in brw_vue_map.c.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
9 years agoi965: Split VUE map handling out of brw_vs.c into brw_vue_map.c.
Kenneth Graunke [Fri, 15 May 2015 16:54:23 +0000 (09:54 -0700)]
i965: Split VUE map handling out of brw_vs.c into brw_vue_map.c.

This was originally only used by the vertex shader, but it's now used by
the geometry shader as well, and will also eventually be used for
tessellation control and evaluation shaders.

I suspect it will be easier to find in a file named after the concept.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
9 years agoi965/gen9: Implement Push Constant Buffer workaround
Ben Widawsky [Thu, 4 Jun 2015 04:35:51 +0000 (21:35 -0700)]
i965/gen9: Implement Push Constant Buffer workaround

This implements a workaround (exact excerpt as a comment in the code). The docs
specify [clearly, after you struggle for a while] that the offset isn't relative
to state base. This actually makes sense. This fixes hangs on SKL.

Buffer #0 is meant to be used for normal uniforms.
Buffer #1 is typically used for gather constants when using RS.
Buffer #1-#3 could be used to push a bunch of UBO data which would just be
  somewhere in memory, and not relative to the dynamic state.

NOTE: I've moved away from the ternary operator for the new gen9 conditions.
Admittedly it's probably not great to do this, but I really want to fix this all
up in the subsequent patch and doing it here makes that diff a lot nicer. I want
to split out the gen8/9 code to make the function a bit more readable, but to
keep this easily cherry-pickable I am doing this fix first. If we decide not to
merge the cleanup patch then I can revisit this.

Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Tested-by: Valtteri Rantala <Valtteri.rantala@intel.com>
9 years agomesa: use _mesa_lookup_enum_by_nr() in print_array()
Brian Paul [Mon, 22 Jun 2015 14:29:49 +0000 (08:29 -0600)]
mesa: use _mesa_lookup_enum_by_nr() in print_array()

Print GL_FLOAT, etc. instead of hex value.

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
9 years agoilo: emit 3DPRIMITIVE from gen6_3dprimitive_info
Chia-I Wu [Mon, 22 Jun 2015 06:27:19 +0000 (14:27 +0800)]
ilo: emit 3DPRIMITIVE from gen6_3dprimitive_info

It allows us to remove ilo_ib_state::draw_start_offset and
ILO_PRIM_RECTANGLES.  gen6_3d_translate_pipe_prim() is also replaced by
ilo_translate_draw_mode().

9 years agoilo: align vertex buffer size in buf_create()
Chia-I Wu [Mon, 22 Jun 2015 06:15:52 +0000 (14:15 +0800)]
ilo: align vertex buffer size in buf_create()

With ilo_format.[ch] moved out of core, the aligning of vertex buffers does
not belong to core anymore.

9 years agoilo: move ilo_format.[ch] out of core
Chia-I Wu [Mon, 22 Jun 2015 06:06:13 +0000 (14:06 +0800)]
ilo: move ilo_format.[ch] out of core

They provide PIPE_FORMAT_x to GEN6_FORMAT_x translation as well as some
convenient helpers.  Move them out of core.

9 years agoilo: add ilo_state_surface_valid_format()
Chia-I Wu [Mon, 22 Jun 2015 05:37:05 +0000 (13:37 +0800)]
ilo: add ilo_state_surface_valid_format()

Check if a surface format can be used for the specified access type.

9 years agoilo: add ilo_state_vf_valid_element_format()
Chia-I Wu [Mon, 22 Jun 2015 05:15:24 +0000 (13:15 +0800)]
ilo: add ilo_state_vf_valid_element_format()

Check if a surface format can be used as a VE format.

9 years agonvc0: use NV_VRAM_DOMAIN() macro
Alexandre Courbot [Fri, 17 Oct 2014 06:05:32 +0000 (15:05 +0900)]
nvc0: use NV_VRAM_DOMAIN() macro

Use the newly-introduced NV_VRAM_DOMAIN() macro to support alternative
VRAM domains for chips that do not have dedicated video memory.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Martin Peres <martin.peres@free.fr>
9 years agonouveau: support for custom VRAM domains
Alexandre Courbot [Fri, 17 Oct 2014 05:58:11 +0000 (14:58 +0900)]
nouveau: support for custom VRAM domains

Some GPUs (e.g. GK20A, GM20B) do not embed VRAM of their own and use
the system memory as a backend instead. For such systems, allocating
objects in VRAM results in errors since the kernel will not allow
VRAM objects allocations.

This patch adds a vram_domain member to struct nouveau_screen that can
optionally be initialized to an alternative domain to use for VRAM
allocations. If left untouched, NOUVEAU_BO_VRAM will be used for
systems that embed VRAM, and NOUVEAU_BO_GART will be used for VRAM-less
systems.

Code that uses GPU objects is then expected to use the NV_VRAM_DOMAIN()
macro in place of NOUVEAU_BO_VRAM to ensure correct behavior on
VRAM-less chips.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Martin Peres <martin.peres@free.fr>
9 years agoilo: add ilo_state_compute
Chia-I Wu [Sat, 20 Jun 2015 15:27:08 +0000 (23:27 +0800)]
ilo: add ilo_state_compute

Replace gen6_idrt_data with ilo_state_compute, which has a bunch of
validations and is now preferred.

9 years agor600g: ignore sampler views for now.
Dave Airlie [Mon, 22 Jun 2015 03:36:41 +0000 (13:36 +1000)]
r600g: ignore sampler views for now.

This fixes a regression in that r600 stopped working when
sampler views were pushed.

Signed-off-by: Dave Airlie <airlied@redhat.com>
9 years agofreedreno/ir3: pass sz to split_dest()
Rob Clark [Sat, 13 Jun 2015 13:14:31 +0000 (09:14 -0400)]
freedreno/ir3: pass sz to split_dest()

For query_levels, we generate a getinfo with writemask of (z), which RA
will consider as size==3.  But we were still generating four fanouts.
Which meant that RA would see it as two different register classes,
depending on the path to definer.  Ie. on the getinfo instruction itself
it would see size==3, but when chasing back through the fanouts it would
see size==4.

Easiest way to solve that is to just generate the chain of neighboring
fanouts to have the correct size in the first place.

Note: we may eventually want split_dest() to take start/end or wrmask
instead, since really we only need size==1.  But RA is not clever enough
for that, query_levels is not that common, and the other two registers
that get allocated are never used so those register slots can be
immediately re-used.  So bunch of work for probably no real gain.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3/nir: add more opcodes
Rob Clark [Fri, 12 Jun 2015 18:27:44 +0000 (14:27 -0400)]
freedreno/ir3/nir: add more opcodes

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: only unminify txf coords on a3xx
Rob Clark [Mon, 8 Jun 2015 18:45:47 +0000 (14:45 -0400)]
freedreno/ir3: only unminify txf coords on a3xx

Seems like a4xx gets this right.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno: remove int sampler shader variants
Rob Clark [Mon, 8 Jun 2015 18:23:49 +0000 (14:23 -0400)]
freedreno: remove int sampler shader variants

We get this information from NIR (which gets it from sview decl in tgsi
when translating from tgsi), so no need to maintain shader variants for
this.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: block reshuffling and loops!
Rob Clark [Tue, 9 Jun 2015 21:17:06 +0000 (17:17 -0400)]
freedreno/ir3: block reshuffling and loops!

This shuffles things around to allow the shader to have multiple basic
blocks.  We drop the entire CFG structure from nir and just preserve the
blocks.  At scheduling we know whether to schedule conditional branches
or unconditional jumps at the end of the block based on the # of block
successors.  (Dropping jumps to the following instruction, etc.)

One slight complication is that variables (load_var/store_var, ie.
arrays) are not in SSA form, so we have to figure out where to put the
phi's ourself.  For this, we use the predecessor set information from
nir_block.  (We could perhaps use NIR's dominance frontier information
to help with this?)

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: a4xx encodes larger immed offset
Rob Clark [Mon, 1 Jun 2015 16:35:19 +0000 (12:35 -0400)]
freedreno/ir3: a4xx encodes larger immed offset

Without this, negative branch/jump offsets look like very large positive
offsets.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: simplify find_neighbors stop condition
Rob Clark [Mon, 25 May 2015 14:59:21 +0000 (10:59 -0400)]
freedreno/ir3: simplify find_neighbors stop condition

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: move inputs/outputs to shader
Rob Clark [Mon, 25 May 2015 14:30:54 +0000 (10:30 -0400)]
freedreno/ir3: move inputs/outputs to shader

These belong in the shader, rather than the block.  Mostly a lot of
churn and nothing too interesting.  But splitting this out from the
rest of ir3_block reshuffling to cut down the noise in the later
patch.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3/ra: use register_allocate
Rob Clark [Fri, 1 May 2015 16:21:12 +0000 (12:21 -0400)]
freedreno/ir3/ra: use register_allocate

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: introduce ir3_compiler object
Rob Clark [Sat, 23 May 2015 17:37:41 +0000 (13:37 -0400)]
freedreno/ir3: introduce ir3_compiler object

Right now, just provides a cleaner way to get at the gpu-id, given the
separation between compiler and context.  But we will need this also to
hold the reg-set for new register allocation.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: dump nocp option
Rob Clark [Sat, 25 Apr 2015 20:30:55 +0000 (16:30 -0400)]
freedreno/ir3: dump nocp option

No longer used, or even possible, with NIR frontend.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: silence warnings
Rob Clark [Tue, 9 Jun 2015 21:42:16 +0000 (17:42 -0400)]
freedreno/ir3: silence warnings

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: remove tgsi f/e
Rob Clark [Sat, 25 Apr 2015 14:22:49 +0000 (10:22 -0400)]
freedreno/ir3: remove tgsi f/e

Also remove ir3_flatten which was only used by tgsi f/e.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3/sched: convert to priority queue
Rob Clark [Thu, 30 Apr 2015 17:57:15 +0000 (13:57 -0400)]
freedreno/ir3/sched: convert to priority queue

Use a more standard priority-queue based scheduling algo.  It is simpler
and will make things easier once we have multiple basic blocks and flow
control.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: use standard list implementation
Rob Clark [Thu, 30 Apr 2015 15:38:43 +0000 (11:38 -0400)]
freedreno/ir3: use standard list implementation

Use standard list_head double-linked list and related iterators,
helpers, etc, rather than weird combo of instruction array and next
pointers depending on stage.  Now block has an instrs_list.  In
certain stages where we want to remove and re-add to the blocks list
we just use list_replace() to copy the list to a new list_head.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: drop dot graph dumping
Rob Clark [Thu, 30 Apr 2015 14:10:14 +0000 (10:10 -0400)]
freedreno/ir3: drop dot graph dumping

At least for now.. right now the instruction and instruction list
printing should suffice, and the re-working of ir3_block would require
a lot of changes in that code.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agofreedreno/ir3: more builder helpers
Rob Clark [Sat, 25 Apr 2015 15:05:27 +0000 (11:05 -0400)]
freedreno/ir3: more builder helpers

Use ir3_MOV() builder in a couple of spots, rather than open-coding the
instruction construction.  Also add ir3_NOP() builder and use that
instead of open coding.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agogallium/ttn: add missing SNE
Rob Clark [Thu, 30 Apr 2015 19:20:03 +0000 (15:20 -0400)]
gallium/ttn: add missing SNE

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
9 years agoutil/list: add list_first/last_entry
Rob Clark [Wed, 29 Apr 2015 12:38:45 +0000 (08:38 -0400)]
util/list: add list_first/last_entry

I need an easier way to get at head/tail in ir3.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
9 years agogallium/ttn: add texture-type support
Rob Clark [Mon, 8 Jun 2015 18:09:09 +0000 (14:09 -0400)]
gallium/ttn: add texture-type support

v2: rebased on using SVIEW to hold type information

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agoglsl_to_tgsi: add SVIEW decl support
Rob Clark [Mon, 8 Jun 2015 17:20:30 +0000 (13:20 -0400)]
glsl_to_tgsi: add SVIEW decl support

Freedreno needs sampler type information to deal with int/uint textures.
To accomplish this, start creating sampler-view declarations, as
suggested here:

 http://lists.freedesktop.org/archives/mesa-dev/2014-November/071583.html

create a sampler-view with index matching the sampler, to encode the
texture type (ie. SINT/UINT/FLOAT).  Ie:

   DCL SVIEW[n], 2D, UINT
   DCL SAMP[n]
   TEX OUT[1], IN[1], SAMP[n]

For tgsi texture instructions which do not take an explicit SVIEW
argument, the SVIEW index is implied by the SAMP index.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agoutil/blitter (and friends): generate appropriate SVIEW decls
Rob Clark [Thu, 11 Jun 2015 00:02:55 +0000 (20:02 -0400)]
util/blitter (and friends): generate appropriate SVIEW decls

Some hardware needs to know the sampler type.  Update the blit related
shaders to include SVIEW decl.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agoutil/pstipple: updates for SVIEW decls
Rob Clark [Thu, 11 Jun 2015 00:01:11 +0000 (20:01 -0400)]
util/pstipple: updates for SVIEW decls

To allow for shaders which use SVIEW decls for TEX* instructions, we
need to preserve the constraint that the shader either has no SVIEW's or
it has one matching SVIEW for each SAMP.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agodraw: updates to support SVIEW decls
Rob Clark [Wed, 10 Jun 2015 23:59:20 +0000 (19:59 -0400)]
draw: updates to support SVIEW decls

To allow for shaders which use SVIEW decls for TEX* instructions, we
need to preserve the constraint that the shader either has no SVIEW's or
it has one matching SVIEW for each SAMP.

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agotgsi/transform: add support for SVIEW decls
Rob Clark [Wed, 10 Jun 2015 23:51:32 +0000 (19:51 -0400)]
tgsi/transform: add support for SVIEW decls

TODO single return_type (use enum)

v2: single return_type arg, and use enum

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agotgsi: update docs for SVIEW usage with TEX* instructions
Rob Clark [Wed, 10 Jun 2015 23:49:55 +0000 (19:49 -0400)]
tgsi: update docs for SVIEW usage with TEX* instructions

Based on mailing list discussion here:

http://lists.freedesktop.org/archives/mesa-dev/2014-November/071583.html

Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
9 years agomesa: Back out an accidental change I had in a VC4 commit.
Eric Anholt [Sat, 20 Jun 2015 22:02:50 +0000 (15:02 -0700)]
mesa: Back out an accidental change I had in a VC4 commit.

This was a hack as part of debugging some glamor-on-GLES2 behavior that
ended up being an xserver bug.  I suspect we can just flip this extension
on for GLES2, but the spec says it requires 3.1.

9 years agodocs: add news item and link release notes for mesa 10.5.8
Emil Velikov [Sat, 20 Jun 2015 15:40:56 +0000 (16:40 +0100)]
docs: add news item and link release notes for mesa 10.5.8

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
9 years agodocs: Add sha256sums for the 10.5.8 release
Emil Velikov [Sat, 20 Jun 2015 15:37:16 +0000 (16:37 +0100)]
docs: Add sha256sums for the 10.5.8 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
(cherry picked from commit a81b1d5512f64ffca1c13a5937e7eb0de24713ae)

9 years agoAdd release notes for the 10.5.8 release
Emil Velikov [Sat, 20 Jun 2015 14:14:45 +0000 (15:14 +0100)]
Add release notes for the 10.5.8 release

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
(cherry picked from commit 24b043aab73ce066ded6e4bc93f589008dfc8484)

9 years agovc4: Use a defined t value for 1D textures.
Eric Anholt [Sat, 20 Jun 2015 02:47:44 +0000 (19:47 -0700)]
vc4: Use a defined t value for 1D textures.

This doesn't fix the broken 1D cases of texsubimage, but it does prevent
segfaulting when dumping the QIR code generated in fbo-1d.

9 years agovc4: Fix write-only texsubimage when we had to align.
Eric Anholt [Sat, 20 Jun 2015 02:41:25 +0000 (19:41 -0700)]
vc4: Fix write-only texsubimage when we had to align.

We need to make sure that when we store the aligned box, we've got
initialized contents in the border.  We could potentially just load the
border area, but for now let's get text rendering working in X (and fix
the GL_TEXTURE_2D errors in piglit's texsubimage test and
gl-2.1-pbo/test_tex_image)

9 years agoilo: clean up header includes
Chia-I Wu [Thu, 18 Jun 2015 14:48:14 +0000 (22:48 +0800)]
ilo: clean up header includes

Core is more self-contained now.

9 years agoilo: avoid ilo_ib_state in genX_3DPRIMITIVE()
Chia-I Wu [Fri, 19 Jun 2015 16:34:29 +0000 (00:34 +0800)]
ilo: avoid ilo_ib_state in genX_3DPRIMITIVE()

ilo_ib_state is not in core.

9 years agoilo: move gen6_so_SURFACE_STATE() out of core
Chia-I Wu [Thu, 18 Jun 2015 14:47:20 +0000 (22:47 +0800)]
ilo: move gen6_so_SURFACE_STATE() out of core

It does not belong to core.

9 years agoilo: add ilo_state_sol_buffer
Chia-I Wu [Mon, 15 Jun 2015 07:17:45 +0000 (15:17 +0800)]
ilo: add ilo_state_sol_buffer

It serves the same purpose as ilo_state_vertex_buffer does.

9 years agoilo: add ilo_state_index_buffer
Chia-I Wu [Fri, 19 Jun 2015 07:10:02 +0000 (15:10 +0800)]
ilo: add ilo_state_index_buffer

It serves the same purpose as ilo_state_vertex_buffer does.

9 years agoilo: add ilo_state_vertex_buffer
Chia-I Wu [Fri, 19 Jun 2015 07:06:50 +0000 (15:06 +0800)]
ilo: add ilo_state_vertex_buffer

Being a parameter-like state, we may want to get rid of
ilo_state_vertex_buffer_info or ilo_state_vertex_buffer eventually.  But we
want them now as they are how we do cross-validation right now.

9 years agoilo: add 3DSTATE_VF_INSTANCING to ilo_state_vf
Chia-I Wu [Thu, 18 Jun 2015 06:26:29 +0000 (14:26 +0800)]
ilo: add 3DSTATE_VF_INSTANCING to ilo_state_vf

3DSTATE_VF_INSTANCING specifies instancing enable and step rate.  They are
specified along with 3DSTATE_VERTEX_BUFFERS instead prior to Gen8.  Both
commands are added.

9 years agoilo: add 3DSTATE_VF to ilo_state_vf
Chia-I Wu [Tue, 16 Jun 2015 15:11:06 +0000 (23:11 +0800)]
ilo: add 3DSTATE_VF to ilo_state_vf

3DSTATE_VF specifies cut index enable and cut index.  Cut index enable is
specified in 3DSTATE_INDEX_BUFFER instead prior to Gen7.5.  Both commands are
added.

9 years agoilo: embed pipe_index_buffer in ilo_ib_state
Chia-I Wu [Thu, 18 Jun 2015 05:55:32 +0000 (13:55 +0800)]
ilo: embed pipe_index_buffer in ilo_ib_state

Make it obvious that we save a copy of pipe_index_buffer.

9 years agoilo: fix a buffer overrun
Chia-I Wu [Fri, 19 Jun 2015 15:29:32 +0000 (23:29 +0800)]
ilo: fix a buffer overrun

Add missing parentheses in SURFTYPE_NULL initialization.

9 years agoilo: fix a -Wmaybe-uninitialized warning
Chia-I Wu [Fri, 19 Jun 2015 15:24:17 +0000 (23:24 +0800)]
ilo: fix a -Wmaybe-uninitialized warning

ilo_shader.c: In function ‘ilo_shader_select_kernel_sbe’:
ilo_shader.c:1140:27: warning: ‘src_skip’ may be used uninitialized in this
function [-Wmaybe-uninitialized]

9 years agoglsl: fix formatting glitch in _mesa_print_ir()
Brian Paul [Fri, 19 Jun 2015 22:45:44 +0000 (16:45 -0600)]
glsl: fix formatting glitch in _mesa_print_ir()

Print the closing ) before the newline.  Trivial.

9 years agoi965/gen8: Use HALIGN_16 for single sample mcs buffers
Ben Widawsky [Fri, 19 Jun 2015 01:45:47 +0000 (18:45 -0700)]
i965/gen8: Use HALIGN_16 for single sample mcs buffers

The original code meant to do this, but was only checking num_samples == 1 to
figure out if a surface was fast clear capable. However, we can allocate single
sample miptrees with num_samples == 0 (when it's an internally created buffer).

This fixes a bunch of the piglit tests on gen8. Other gens should have been
fine.

Here is the order of events that allowed this to slip through:
t0: I wrote halign patches and tested them. These alignment assertions are for
   gen8 fast clear surfaces, basically.
t1: I pushed bogus perf patch which made fast clears never happen
t2: Reworked halign patches based on Chad's feedback and introduced the bug this
   patch fixes.
t2.5: I tested reworked patches, but assertion wasn't hit because of t1.
t3. Matt fixed issue in t1 which made fast clears happen here:
commit 22af95af8316f2888a3935cdf774ff0997b3dd42
Author: Matt Turner <mattst88@gmail.com>
Date:   Thu Jun 18 16:14:50 2015 -0700

    i965: Add missing braces around if-statement.

This logic should match that of the v1 of my halign patch series.

Cc: Kenneth Graunke <kenneth@whitecape.org>
Cc: Matt Turner <mattst88@gmail.com>
Reported-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Tested-by: Mark Janes <mark.a.janes@intel.com>
9 years agomesa: move ARB_gs5 enums to core, EXT_polygon_offset_clamp to desktop
Ilia Mirkin [Fri, 19 Jun 2015 16:08:24 +0000 (12:08 -0400)]
mesa: move ARB_gs5 enums to core, EXT_polygon_offset_clamp to desktop

When adding EXT_polygon_offset_clamp, I first made it core-only, and
never moved the enum getter back to the GL/GL_CORE section. Similarly,
ARB_gs5 is a core-only extension, so move its getters to the GL_CORE
section.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Matt Turner <mattst88@gmail.com>
9 years agou_vbuf: fix src_offset alignment in u_vbuf_create_vertex_elements()
Brian Paul [Fri, 19 Jun 2015 00:03:29 +0000 (18:03 -0600)]
u_vbuf: fix src_offset alignment in u_vbuf_create_vertex_elements()

If the driver says PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY=1,
the driver should never receive a pipe_vertex_element::src_offset value
that's not a multiple of four.  But the vbuf code wasn't actually adjusting
the src_offset value when creating the vertex element state object.

We just need to align the src_offset values put in the driver_attribs[]
array.

See the piglit gl-1.5-vertex-buffer-offsets test.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
9 years agogallium: whitespace, formatting clean-up in p_state.h
Brian Paul [Thu, 18 Jun 2015 23:53:42 +0000 (17:53 -0600)]
gallium: whitespace, formatting clean-up in p_state.h

Remove trailing whitespace, move some braces, 78-column wrapping.
Trivial.

9 years agost/wgl: fix WGL_SWAP_METHOD_ARB query
Brian Paul [Tue, 16 Jun 2015 21:32:46 +0000 (15:32 -0600)]
st/wgl: fix WGL_SWAP_METHOD_ARB query

There are three possible return values (not two): WGL_SWAP_COPY_ARB,
WGL_SWAP_EXCHANGE_EXT and WGL_SWAP_UNDEFINED_ARB.

VMware bug 1431184

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>
9 years agostw: use new stw_get_nop_function() function to avoid Viewperf 12 crashes
Brian Paul [Tue, 16 Jun 2015 21:32:46 +0000 (15:32 -0600)]
stw: use new stw_get_nop_function() function to avoid Viewperf 12 crashes

Also, print a warning if we do return NULL from wglGetProcAddress() to
help spot this sort of problem in the future.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
9 years agostw: add some no-op functions for GL_EXT_dsa, GL_NV_half_float
Brian Paul [Tue, 16 Jun 2015 21:32:46 +0000 (15:32 -0600)]
stw: add some no-op functions for GL_EXT_dsa, GL_NV_half_float

Viewperf 12 calls wglGetProcAddress() to get pointers to some unsupported
DSA and half-float functions.  We return NULL but Viewperf doesn't check
for null before trying to jump through the pointer.  That causes a crash.

This patch adds no-op functions to call instead (used by the next patch).
This avoids the crash but the rendering is incorrect.

Some DSA functions are being added to Mesa at this time so we may be
able to remove some of these no-ops in the future.

More no-op functions may be added as needed.

VMware PR1383421

Reviewed-by: José Fonseca <jfonseca@vmware.com>
9 years agost/wgl: Don't return core profile for 3.1 contexts.
Jose Fonseca [Tue, 16 Jun 2015 21:32:46 +0000 (15:32 -0600)]
st/wgl: Don't return core profile for 3.1 contexts.

WGL_CONTEXT_PROFILE_MASK_ARB doesn't apply to desktop OpenGL versions
less than 3.2 -- applications can't specify whether they want a core or
a compat 3.1 context -- instead they are supposed the check whether the
returned context advertises GL_ARB_compatibility extension.

Mesa doesn't support compatability contexts for version higher than 3.1,
so we used to return core profile context, but this makes several Windows
applications unhappy, because they just assume they got a compatability
context without checking.

So it seems safer to on Windows to never return core profile for 3.1,
ie, just fail the context creation.

VMware PR1365920.

Reviewed-by: Brian Paul <brianp@vmware.com>
9 years agost/wgl: set PIPE_BIND_SAMPLER_VIEW for window color buffers
Brian Paul [Tue, 16 Jun 2015 21:32:46 +0000 (15:32 -0600)]
st/wgl: set PIPE_BIND_SAMPLER_VIEW for window color buffers

To allow sampling from the surface for things like glCopyPixels
or glCopyTexSubImage.

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
9 years agost/wgl: add support for multisample pixel formats
Brian Paul [Tue, 16 Jun 2015 21:32:45 +0000 (15:32 -0600)]
st/wgl: add support for multisample pixel formats

Create pixel formats with 0, 4, 8 and 16 samples per pixel.
Add a SVGA_FORCE_MSAA env var to force creating all pixel formats
with a particular sample count.  This is useful for testing Mesa/GLUT/
etc. programs which don't ordinarily use multisample.

Reviewed-by: Matthew McClure <mcclurem@vmware.com>
9 years agost/wgl: respect sample count when creating framebuffer surfaces
Brian Paul [Tue, 16 Jun 2015 21:32:45 +0000 (15:32 -0600)]
st/wgl: respect sample count when creating framebuffer surfaces

Use the visual/pixel format's sample count instead of zero.

Reviewed-by: Matthew McClure <mcclurem@vmware.com>
9 years agost/wgl: fix WGL_SAMPLE_BUFFERS_ARB query
Brian Paul [Tue, 16 Jun 2015 21:32:45 +0000 (15:32 -0600)]
st/wgl: fix WGL_SAMPLE_BUFFERS_ARB query

Only report 1 for WGL_SAMPLE_BUFFERS_ARB if the number of samples
per pixel > 1.

Reviewed-by: Matthew McClure <mcclurem@vmware.com>