egl/android: Drop unused 'format' param in get_back_bo()

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl/android: Align channel masks in HAL_PIXEL_FORMAT table

Improves readability. No change in behavior.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl/drm: remove temporary fd variable

In all codepaths, this var ends up assigned to the struct, except one:
a cleanup codepath, where the `close()` was removed, leading to fd leaks.
Remove the temp fd and assign to the struct field directly instead.

CovID: 1213930
Fixes: 7ec07beedf486d8ab901 ("egl/drm: make use of the
                              dri2_display_destroy() helper")
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>

mesa: throw an INVALID_OPERATION error in get_texobj_by_name()

Because get_texobj_by_name() can already throw a INVALID_ENUM
error, it makes more sense to add a check directly there.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

mesa: add new 'name' parameter to get_texobj_by_name()

To display better function names when INVALID_OPERATION is
returned. Requested by Timothy.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>

radeonsi: remove unused si_pm4_state::compute_pkt

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

radeonsi: remove chip_class define from si_pm4.h

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

radeonsi: merge si_pm4_free_state_simple() into si_pm4_free_state()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

mesa/util: fix arithmetic use of 'void *' in u_vector_foreach

u_vector_foreach is currently only used by the Intel Vulkan
driver but when this macro is used in mesa core, GCC reports
a compile-time error. Probably because some compiler options
are different.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

mesa: remove _mesa from static function names

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

mesa/st: indentation tidy-up

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

freedreno/a5xx: drop WFIs in emit_marker5()

Results in always having at least one WFI between draws, which was
slowing stk down by ~5% and ~10% in xonotic.

(also drop bogus assert while we're at it.)

Signed-off-by: Rob Clark <robdclark@gmail.com>

freedreno/a5xx: timestamp / time-elapsed queries

Signed-off-by: Rob Clark <robdclark@gmail.com>

freedreno/a5xx: rename query result struct

Going to want the same thing for timestamp queries.

Signed-off-by: Rob Clark <robdclark@gmail.com>

freedreno: update generated headers

Signed-off-by: Rob Clark <robdclark@gmail.com>

i965: Delete dead old-school packing structs.

Trivial.

swr/rast: code cleanup (no functional change)

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: whitespace changes

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: code cleanup (no functional change)

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: allow early-z if shader uses depth value

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: move wireframe/point triangle binning after culling

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: remove unused functions

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: code cleanup (no functional change)

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: move binner utility functions to binner.h

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: SIMD16 FE - fix/use SIMD16 calcDeterminantIntVertical()

Stop double pumping the SIMD8 version.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: add renderTargetArrayIndex to SWR_PS_CONTEXT

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: make simd16 logicops avx512f safe

Express the simd16 logicops in terms of avx512f instructions.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: SIMD16 FE - add SIMD16 types to jitter

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: SIMD16 FE - fix PA_STATE_OP::Reset()

Fixes instanced GS.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: SIMD16 FE - simplify/refactor StreamOut

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: SIMD16 FE - fix conservative rasterization

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: SIMD16 FE - interleaved simdvertex output in GS

Eliminates conversion copies on GS output from simdvertex to simd16vertex.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: fix _simd16_movemask_(ps,pd) native AVX512 intrinsics

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: SIMD16 FE - primitive assembly simplification

Reduce/simplify vertex storage usage in PA_STATE_OPT, fix PA
GetNextVSOutput wrap-around behaviour and eliminate unnecessary
SIMDVERTEX copies/storage for tri fan in PA_STATE_OPT

Fixes the OpenGL tri fan test failure under SIMD16 -
triangle-rasterization-overdraw.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: silence write of cfg graph

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: add CreateDirectoryPath to recursively create directories

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: add support for DX1_RGB{_SRGB} formats

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: clean up whitespace

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: adjust BinPostSetupPoints* function signature

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

swr/rast: remove extra pixel center adjustment in BinPostSetupPoints

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>

anv: Port over CACHE_MODE_1 optimization fix enables from brw.

Ben and I haven't observed these to help anything, but they enable
hardware optimizations for particular cases.  It's probably best to
enable them ahead of time, before we run into such a case.

Reviewed-by: Plamena Manolova <plamena.manolova@intel.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>

genxml: Add Gen9 CACHE_MODE_1 definitons.

These were already in gen8.xml but not gen9.xml.  There are a few new
fields and a couple that have changed.  These are all documented in the
Skylake PRM, Volume 2c Command Reference: Registers, Part 1.

Reviewed-by: Plamena Manolova <plamena.manolova@intel.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>

i965: Set the "Float Blend Optimization Enable" bit on Gen9+.

This is woefully undocumented.  It's some kind of optimization that
avoids unnecessary render target reads when blending with a floating
point render target, using independent alpha blending modes.

The internal documentation indicates that this bit exists on Cherryview
as well, but the other driver doesn't appear to set it on that platform.
There's also some confusing wording that indicates that it may exist on
Broadwell, but the documentation says it's reserved, so who knows.

I was not able to find any workload that benefited from setting this
bit, but it seems like a good idea to set it nonetheless.

Reviewed-by: Plamena Manolova <plamena.manolova@intel.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>

i965: Fix type of brw_context::render_target_format[]

It's an array of isl_format, not uint32_t. This patch updates every
reference to render_target_format[] git-grep.

Trivial cleanup. No change in behavior.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965: Move func to right comment block in brw_context.h

brw_init_surface_formats() is defined in brw_surface_formats.c, not
brw_wm_surface_state.c.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965: Document type of GLuint __DRIimage::format

It's either a mesa_format or mesa_array_format.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965: Add whitespace in intel_update_image_buffers()

Improve readability.  Add an empty line between two large 'if' blocks.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965: Move an 'i' declaration into its 'for' loop

In intel_update_dri2_buffers().
Trivial cleanup.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965: Fix type of intel_update_image_buffers::format

It's a mesa_format, not an unsigned int.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965: Rename intel_create_renderbuffer

The name is misleading because the function is unrelated to GL
renderbuffers. Rename it to intel_create_winsys_renderbuffer.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965/dri: Combine declaration and assignment in intelCreateBuffer

Trivial cleanup.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

i965/dri: Rewrite comment for intelCreateBuffer

The old comment pinned this function to X11 windows. In reality, this
function serves more than X11 and more than just windows.

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

mesa: Avoid leaking surface in st_renderbuffer_delete

v2: add comment in code

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100741
Fixes: a5e733c6b52 mesa: drop current draw/read buffer when ctx is released
Reviewed-by: Rob Clark <robdclark@gmail.com> (v1)
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl: advertise EGL_EXT_image_dma_buf_import_modifiers

v2: check for DRIimageExtension version 15 (Jason Ekstrand)

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

egl: implement eglQueryDmaBufModifiersEXT

query and return supported dmabuf format modifiers for
EGL_EXT_image_dma_buf_import_modifiers.

v2: move format check to the driver instead of making format queries
   here and then checking.
v3: Check DRIimageExtension version before query (Daniel Stone)
v4:
- move to DRIimageExtension version 15, check queryDmaBufModifiers before
  calling (Jason Ekstrand)
- pass external_only to the driver instead of setting as EGL_TRUE here
  (Emil Velikov, Daniel Stone)

Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

egl: implement eglQueryDmaBufFormatsEXT

allow egl clients to query the dmabuf formats supported on this platform.

v2: return EGLBoolean.
v3: Check DRIimageExtension version before querying (Daniel Stone).
v4: move to DRIimageExtension version 15, error checking (Jason Ekstrand).

Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>
Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

egl/dri2: Create EGLImages with dmabuf modifiers

Allow creating EGLImages with dmabuf format modifiers when target is
EGL_LINUX_DMA_BUF_EXT for EGL_EXT_image_dma_buf_import_modifiers.

v2:
- clear modifier assembling and error label name (Eric Engestrom)
v3:
- remove goto jumps within switch-case (Emil Velikov)
- treat zero as valid modifier (Daniel Stone)
- ensure same modifier across all dmabuf planes (Emil Velikov)
v4:
- allow modifiers to add extra planes (Louis-Francis Ratté-Boulianne)
v5:
- fix error checking, some cleanups (Jason Ekstrand)
- pass single copy of the modifier to createImageFromDmaBufs2

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

dri: introduce dmabuf format modifier related handles

these allow dmabuf import with modifiers, and supported format and
modifier queries, which are used to implement
EGL_EXT_image_dma_buf_import_modifiers.

v2:
- squash dmabuf queries into DRIimage version 15 (Jason Ekstrand).
- add external_only param to queryDmaBufModifiers (Emil, Daniel Stone)
- pass a single modifier form createImageFromDmaBufs2 since all planes have
the same modifier (Jason Ekstrand)

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

egl/main: add support for fourth plane tokens

The EGL_EXT_dma_buf_import_modifiers extension adds support for a
fourth plane, just like DRM KMS API does.

Bump maximum dma_buf plane count to four.

v2: prevent attribute tokens from being parsed if
    EXT_image_dma_buf_import_modifiers is not suported. (Emil Velikov)

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>

egl: introduce DMA_BUF_MAX_PLANES

Rather than hardcoding 3, use a #define. Makes it easier to bump this
later to 4.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Varad Gautam <varad.gautam@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>

nvc0: support for GP10B

GP10B uses the same 3D class as GP100.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Acked-by: Ilia Mirkin <imirkin@alum.mit.edu>

etnaviv: Don't try to use the index buffer if size is zero

If info->index_size is zero, info->index will point to uninitialized
memory.

Fatal signal 11 (SIGSEGV), code 2, fault addr 0xab5d07a3 in tid 20456 (surfaceflinger)

lst: Remove useless indexbuf conditional in the index_size != 0 case.

Fixes: 330d0607ed60 ("gallium: remove pipe_index_buffer and set_index_buffer")
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>

i965: Always scissor on Gen4-5 instead of disabling guardband.

See commit ece0e535a44c228dd994861592deb155c14740d8.  This makes
Gen4-5 follow the behavior we use on Gen6+.  It seems to have
worked out there.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Unify Gen4-5 and Gen6 SF_VIEWPORT/CLIP_VIEWPORT code.

This brings the improved guardbanding we implemented on Gen6+
back to the older Gen4-5 code.  It also deletes piles of code.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Make a set_scissor_bits helper function.

Gen4-5 include a single SCISSOR_RECT in SF_VIEWPORT.

Making a helper function will allow us to reuse this code for Gen4-5.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Use GENX(packet_length) rather than hardcoded dword counts.

This is clearer and less likely to break in the future.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Move the scissoring code up near the viewport code.

These are fairly related.  Gen4-5 combine the scissor rectangle and
SF_VIEWPORT.  Co-locating them will allow me to avoid forward
declarations of helper functions in a few patches.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

genxml: Make a SCISSOR_RECT structure on Gen4-5.

Gen6+ support multiple scissor rectangles, and define a SCISSOR_RECT
structure containing their dimensions.  On Gen4-5, those same fields
exist in SF_VIEWPORT.

This patch extracts the SF_VIEWPORT fields into a SCISSOR_RECT
structure.  Although not a named concept on Gen4-5, it works just
as well, and gives us a consistent SCISSOR_RECT structure across
all generations, making it easier to reuse code.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Replace brw->gen and devinfo->gen with GEN_GEN.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Rework Sandybridge 3DSTATE_VIEWPORT_STATE_POINTERS.

On Gen7+ we emit 3DSTATE_VIEWPORT_STATE_POINTERS_{SF_CL,CC} when
emitting a new viewport.

This patch makes us take the same approach on Sandybridge - but because
we have a combined command, we just set the appropriate "change" bits.
This eliminates an atom, some dirty flagging, and some brw->*.vp_offset
writes.  It does mean we'll emit two 3DSTATE_VIEWPORT_STATE_POINTERS
instead of one if both change, but that's probably fine.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Port CC_VIEWPORT to genxml.

Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>

i965: Ignore INTEL_SCALAR_* debug variables on Gen10+.

Scalar mode has been default since Broadwell, and vector mode is getting
increasingly unmaintained.  There are a few things that don't even fully
work in vector mode on Skylake, but we've never cared because nobody
uses it.  There's no point in porting it forward to new platforms.

So, just ignore the debug options to force it on.

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

mesa: add KHR_no_error support for glBindBufferRange()

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: create bind_buffer_range() helper

This will help us add KHR_no_error support.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: convert mesa_bind_buffer_range_transform_feedback() to a validate function

This allows some tidy up and also makes it so we can add KHR_no_error
support.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: create _mesa_bind_buffer_range_xfb() helper

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: split bind_atomic_buffer() in two

This will help us add KHR_no_error support.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: split bind_buffer_range_shader_storage_buffer() in two

This will help us implement KHR_no_error support.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: split bind_buffer_range_uniform_buffer() in two

This will help us implement KHR_no_error support.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: add KHR_no_error support for glVertexArrayVertexBuffer()

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: add KHR_no_error support for glBindVertexBuffer()

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

mesa: split vertex_array_vertex_buffer() in two

This will allow us to skip the error checkes when adding
KHR_no_error support.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>

radv: Reserve space for descriptor and push constant user SGPR setting.

flush_compute_state doesn't reserve a large chunk, so these need their own reservation.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Fixes: f4e499ec791 "radv: add initial non-conformant radv vulkan driver"

amd/common: set vcn dec as hw decode as well

Recommit after issue resolved by the previous patch.

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>

amd/common: add vcn dec ip info query for amdgpu version 3.17

Signed-off-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

glthread/gallium: require safe_glthread to start glthread

Print an error message for the user if the requirement isn't met, or
we're not thread safe.

v2: based on Nicolai feedbacks
Check the DRI extension version

v3: based on Emil feedbacks
improve commit and error messages.
use backgroundCallable variable to improve readability

v5: based on Emil feedbacks
Properly check the function pointer

Signed-off-by: Gregory Hainaut <gregory.hainaut@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl: implement __DRIbackgroundCallableExtension.isThreadSafe

v2:
bump version

v3:
Add code comment
s/IsGlThread/IsThread/ (and variation)
Include X11/Xlibint.h protected by ifdef

v5: based on Daniel feedback
Move non X11 code outside of X11 define
Always return true for Wayland

Signed-off-by: Gregory Hainaut <gregory.hainaut@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

glx: implement __DRIbackgroundCallableExtension.isThreadSafe

v2:
bump version

v3:
Add code comment
s/IsGlThread/IsThread/ (and variation)

v4:
DRI3 doesn't hit X through GL call so it is always safe

Signed-off-by: Gregory Hainaut <gregory.hainaut@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

dri: Extend __DRIbackgroundCallableExtensionRec to include a callback that checks for thread safety

DRI-drivers could call Xlib functions, for example to allocate a new back
buffer.

When glthread is enabled, the driver runs mostly on a separate thread.
Therefore we need to guarantee the thread safety between libX11 calls
from the applications (not aware of the extra thread) and the ones from
the driver.

See discussion thread:
   https://lists.freedesktop.org/archives/mesa-dev/2017-April/152547.html

Fortunately, Xlib allows to lock display to ensure thread safety but
XInitThreads must be called first by the application to initialize the lock
function pointer. This patch will allow to check XInitThreads was called
to allow glthread on GLX or EGL platform.

Note: a tentative was done to port libX11 code to XCB but it didn't solve fully
thread safety.
See discussion thread:
   https://lists.freedesktop.org/archives/mesa-dev/2017-April/153137.html

Note: Nvidia forces the driver to call XInitThreads. Quoting their manpage:
"The NVIDIA OpenGL driver will automatically attempt to enable Xlib
thread-safe mode if needed. However, it might not be possible in some
situations, such as when the NVIDIA OpenGL driver library is dynamically
loaded after Xlib has been loaded and initialized. If that is the case,
threaded optimizations will stay disabled unless the application is
modified to call XInitThreads() before initializing Xlib or to link
directly against the NVIDIA OpenGL driver library. Alternatively, using
the LD_PRELOAD environment variable to include the NVIDIA OpenGL driver
library should also achieve the desired result."

v2: based on Nicolai and Matt feedback
Use C style comment

v3: based on Emil feedback
split the patch in 3
s/isGlThreadSafe/isThreadSafe/

v5: based on Marek comment
Add a comment that isThreadSafe is supported by extension v2

Signed-off-by: Gregory Hainaut <gregory.hainaut@gmail.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

egl/wayland: use the image_driver alongside the image_loader

Analogous to earlier commits - image_driver and image_loader are meant
to be used hand in hand.

v2: Rebase

Cc: Derek Foreman <derekf@osg.samsung.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl/wayland: set the resize_callback if the flush extension is available

Strictly speaking __DRI_DRI2 implies __DRI2_FLUSH. Although since we're
using the latter in the callback, we want to use the correct guard.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl/wayland: select the format based on the interface used

Rather than misleadingly depending on DRI2 for the WL_DRM vs WL_SHM
formats, use the wl_drm and wl_shm interface respectively.

Fixes: a1727aa75ed ("egl/wayland: Don't use DRM format codes for SHM")
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl/surfaceless: use the image_driver for image_loader

Analogous to previous commit.

Cc: Chad Versace <chadversary@chromium.org>
Cc: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl/android: use the image_driver alongside the image_loader

They are meant to be used together. Otherwise we'll need workarounds
like egl/wayland. Namely register an image_loader_extension even thought
we should be using only DRI2.

v2: Add missing the bracket to fix the build (Tapani).

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

egl/x11: flatten codeflow

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl/x11: check for dri2_dpy->flush before using the flush extension

Analogous to earlier commit.

Note that the dri2_x11_post_sub_buffer and dri2_x11_swap_buffers_region
paths already implicitly require __DRI2_FLUSH. The corresponding
extensions (NV_post_sub_buffer and NOK_swap_region) are enabled only
with DRI2.

v2: Split cosmetic changes into separate patch.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl/drm: flatten codeflow

Rework the code to return early and drop an indentation level.
It should be easier to read.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl/drm: check for dri2_dpy->flush before using the flush extension

The current __DRI_DRI2 imples __DRI2_FLUSH. At the same time, one can
use __DRI_IMAGE_DRIVER alongside the latter, so the current check is
confusing at best.

Check for what we use.

v2: Split out from whitespace changes

Reviewed-by: Chad Versace <chadversary@chromium.org> (v1)
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>

egl: annotate dri2_egl_display_vtbl as const data

With the final place that modifies the vtbl removed as of last commit we
can annotate the symbols accordingly.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>

egl/wayland: don't modify the vtbl if an extension is not available

With previous commit we'll error out should one be using the extension
when it's not available. Thus we no longer need to modify the vtbl.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>