Re: [PATCH 1/2] drm/i915/tgl: Use TGL stepping info for applying WAs

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On Mon, 2021-01-11 at 13:25 -0800, Lucas De Marchi wrote:
> On Mon, Jan 11, 2021 at 12:57:43PM -0800, Matt Roper wrote:
> > On Mon, Jan 11, 2021 at 10:18:45PM +0200, Jani Nikula wrote:
> > > On Mon, 11 Jan 2021, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> > > wrote:
> > > > On Fri, 08 Jan 2021, Matt Roper <matthew.d.roper@xxxxxxxxx>
> > > > wrote:
> > > > > On Fri, Jan 08, 2021 at 03:18:52PM -0800, Aditya Swarup
> > > > > wrote:
> > > > > > TGL adds another level of indirection for applying WA based
> > > > > > on stepping
> > > > > > information rather than PCI REVID. So change TGL_REVID enum
> > > > > > into
> > > > > > stepping enum and use PCI REVID as index into revid to
> > > > > > stepping table to
> > > > > > fetch correct display and GT stepping for application of
> > > > > > WAs as
> > > > > > suggested by Matt Roper.
> > > > > 
> > > > > So to clarify the goal is to rename "revid" -> "stepping"
> > > > > because the
> > > > > values like "A1," "C0," etc. are't the actual PCI revision
> > > > > ID, but
> > > > > rather descriptions of the stepping of a given IP block; the
> > > > > enum values
> > > > > we use to represent those are arbitrary and don't matter as
> > > > > long as
> > > > > they're monotonically increasing for comparisons.  The PCI
> > > > > revision ID
> > > > > is just the input we use today to deduce what the IP
> > > > > steppings are, and
> > > > > there's talk that we could determine the IP steppings in a
> > > > > different way
> > > > > at some point in the future.
> > > > > 
> > > > > Furthermore, since the same scheme will be used at least for
> > > > > ADL-S, we
> > > > > should drop the "TGL" prefix since there's no need to name
> > > > > these general
> > > > > enum values in a platform-specific manner.
> > > > > 
> > > > > Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
> > > > > 
> > > > > We should probably make the same kind of change to KBL (and
> > > > > use the same
> > > > > stepping enum) too since it has the same kind of extra
> > > > > indirection as
> > > > > TGL/ADL-S, but we can do that as a followup patch.
> > > > 
> > > > FWIW I have a wip series changing the whole thing to abstract
> > > > steppings
> > > > enums that are shared between platforms, but it's in a bit of
> > > > limbo
> > > > because the previous revid changes were applied to drm-intel-
> > > > gt-next,
> > > > and it's fallen pretty far out of sync with drm-intel-next. All
> > > > of this
> > > > really belongs to drm-intel-next, but can't do that until the
> > > > branches
> > > > sync up again.
> > > 
> > > Btw this series doesn't apply to drm-intel-next either, for the
> > > same
> > > reason, and the ADL-S platform definition and PCI IDs must *not*
> > > be
> > > applied to drm-intel-gt-next.
> > 
> > So to clarify, it looks like we have a bunch of revid changes to
> > the
> > display code that got merged to the gt-next tree but not to the
> > intel-next tree?  Should we be going back and also merging /
> > cherry-picking those over to intel-next since that's where the
> > display
> > changes are supposed to go, or is it too late to do that cleanly at
> > this
> > point?
> 
> it was my mistake to merge them to drm-intel-gt-next. They should
> have
> been in drm-intel-next.
> 
> > 
> > Going forward, what should the general strategy be for stuff like
> > platform definitions and such?  Merge such enablement patches to
> > both
> 
> last time we talked about this was regarding dg1 AFAIR and the
> consensus
> was to create a topic branch and that topic branch to be merged in
> both
> branches. That would avoid having 2 commits in different branches.

Yeap, I believe this is the way to go.

> 
> Not sure if it would work out nicely for getting test on CI though.

create an empty topic branch using dim.

Pre-merge CI with drm-tip. Only if passing and if everything is realy
ready. Push to the topic branch using dim.

Then it will be part of drm-tip already for any subsequential pre-merge
CI...

Then do the pull requests to bot drm-intel-next and drm-intel-gt-next.

After everything is pulled to both places, then delete the topic
branch.

> Since the changes are spread through the codebase, we could very
> easily
> hit a situation that this topic branch creates conflicts for other
> patches getting merged on either drm-intel-next or drm-intel-gt-next.
> 
> +Joonas, +Rodrigo
> 
> Lucas De Marchi
> 
> > intel-next and gt-next at the same time so that the basic
> > definitions
> > are available to both trees?  It seems like the whole split into
> > two
> > trees really isn't working well and is just leading to more
> > mistakes and
> > bottlenecks.  What benefit are we supposed to be getting from this
> > split?
> > 
> > 
> > Matt
> > 
> > 
> > > 
> > > BR,
> > > Jani.
> > > 
> > > > 
> > > > My series also completely hides the arrays into a separate .c
> > > > file,
> > > > because the externs with direct array access are turning into
> > > > nightmare. The ARRAY_SIZE() checks rely on the extern
> > > > declaration and
> > > > the actual array definition to have the sizes in sync, but the
> > > > compiler
> > > > does not check that. Really.
> > > > 
> > > > IDK, feels like this merging this series is going to be extra
> > > > churn.
> > > > 
> > > > 
> > > > BR,
> > > > Jani.
> > > > 
> > > > 
> > > > > 
> > > > > 
> > > > > Matt
> > > > > 
> > > > > > 
> > > > > > Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
> > > > > > Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> > > > > > Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
> > > > > > Signed-off-by: Aditya Swarup <aditya.swarup@xxxxxxxxx>
> > > > > > ---
> > > > > >  .../drm/i915/display/intel_display_power.c    |  2 +-
> > > > > >  drivers/gpu/drm/i915/display/intel_psr.c      |  4 +-
> > > > > >  drivers/gpu/drm/i915/display/intel_sprite.c   |  2 +-
> > > > > >  drivers/gpu/drm/i915/gt/intel_workarounds.c   | 26 +++++--
> > > > > > ---
> > > > > >  drivers/gpu/drm/i915/i915_drv.h               | 50
> > > > > > +++++++++----------
> > > > > >  drivers/gpu/drm/i915/intel_pm.c               |  2 +-
> > > > > >  6 files changed, 43 insertions(+), 43 deletions(-)
> > > > > > 
> > > > > > diff --git
> > > > > > a/drivers/gpu/drm/i915/display/intel_display_power.c
> > > > > > b/drivers/gpu/drm/i915/display/intel_display_power.c
> > > > > > index d52374f01316..bb04b502a442 100644
> > > > > > --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> > > > > > +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> > > > > > @@ -5340,7 +5340,7 @@ static void tgl_bw_buddy_init(struct
> > > > > > drm_i915_private *dev_priv)
> > > > > >         int config, i;
> > > > > > 
> > > > > >         if (IS_DG1_REVID(dev_priv, DG1_REVID_A0,
> > > > > > DG1_REVID_A0) ||
> > > > > > -           IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0,
> > > > > > TGL_REVID_B0))
> > > > > > +           IS_TGL_DISP_STEPPING(dev_priv, STEP_A0,
> > > > > > STEP_B0))
> > > > > >                 /* Wa_1409767108:tgl,dg1 */
> > > > > >                 table = wa_1409767108_buddy_page_masks;
> > > > > >         else
> > > > > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > b/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > index c24ae69426cf..a93717178957 100644
> > > > > > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > > > > > @@ -550,7 +550,7 @@ static void hsw_activate_psr2(struct
> > > > > > intel_dp *intel_dp)
> > > > > > 
> > > > > >         if (dev_priv->psr.psr2_sel_fetch_enabled) {
> > > > > >                 /* WA 1408330847 */
> > > > > > -               if (IS_TGL_DISP_REVID(dev_priv,
> > > > > > TGL_REVID_A0, TGL_REVID_A0) ||
> > > > > > +               if (IS_TGL_DISP_STEPPING(dev_priv, STEP_A0,
> > > > > > STEP_A0) ||
> > > > > >                     IS_RKL_REVID(dev_priv, RKL_REVID_A0,
> > > > > > RKL_REVID_A0))
> > > > > >                         intel_de_rmw(dev_priv,
> > > > > > CHICKEN_PAR1_1,
> > > > > >                                     
> > > > > > DIS_RAM_BYPASS_PSR2_MAN_TRACK,
> > > > > > @@ -1102,7 +1102,7 @@ static void
> > > > > > intel_psr_disable_locked(struct intel_dp *intel_dp)
> > > > > > 
> > > > > >         /* WA 1408330847 */
> > > > > >         if (dev_priv->psr.psr2_sel_fetch_enabled &&
> > > > > > -           (IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0,
> > > > > > TGL_REVID_A0) ||
> > > > > > +           (IS_TGL_DISP_STEPPING(dev_priv, STEP_A0,
> > > > > > STEP_A0) ||
> > > > > >              IS_RKL_REVID(dev_priv, RKL_REVID_A0,
> > > > > > RKL_REVID_A0)))
> > > > > >                 intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
> > > > > >                              DIS_RAM_BYPASS_PSR2_MAN_TRACK,
> > > > > > 0);
> > > > > > diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c
> > > > > > b/drivers/gpu/drm/i915/display/intel_sprite.c
> > > > > > index cf3589fd0ddb..4ce32df3855f 100644
> > > > > > --- a/drivers/gpu/drm/i915/display/intel_sprite.c
> > > > > > +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
> > > > > > @@ -3033,7 +3033,7 @@ static bool
> > > > > > gen12_plane_supports_mc_ccs(struct drm_i915_private
> > > > > > *dev_priv,
> > > > > >  {
> > > > > >         /* Wa_14010477008:tgl[a0..c0],rkl[all],dg1[all] */
> > > > > >         if (IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv) ||
> > > > > > -           IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0,
> > > > > > TGL_REVID_C0))
> > > > > > +           IS_TGL_DISP_STEPPING(dev_priv, STEP_A0,
> > > > > > STEP_C0))
> > > > > >                 return false;
> > > > > > 
> > > > > >         return plane_id < PLANE_SPRITE4;
> > > > > > diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> > > > > > b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> > > > > > index c21a9726326a..111d01e2f81e 100644
> > > > > > --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
> > > > > > +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
> > > > > > @@ -71,17 +71,17 @@ const struct i915_rev_steppings
> > > > > > kbl_revids[] = {
> > > > > >         [7] = { .gt_stepping = KBL_REVID_G0, .disp_stepping
> > > > > > = KBL_REVID_C0 },
> > > > > >  };
> > > > > > 
> > > > > > -const struct i915_rev_steppings tgl_uy_revids[] = {
> > > > > > -       [0] = { .gt_stepping = TGL_REVID_A0, .disp_stepping
> > > > > > = TGL_REVID_A0 },
> > > > > > -       [1] = { .gt_stepping = TGL_REVID_B0, .disp_stepping
> > > > > > = TGL_REVID_C0 },
> > > > > > -       [2] = { .gt_stepping = TGL_REVID_B1, .disp_stepping
> > > > > > = TGL_REVID_C0 },
> > > > > > -       [3] = { .gt_stepping = TGL_REVID_C0, .disp_stepping
> > > > > > = TGL_REVID_D0 },
> > > > > > +const struct i915_rev_steppings tgl_uy_revid_step_tbl[] =
> > > > > > {
> > > > > > +       [0] = { .gt_stepping = STEP_A0, .disp_stepping =
> > > > > > STEP_A0 },
> > > > > > +       [1] = { .gt_stepping = STEP_B0, .disp_stepping =
> > > > > > STEP_C0 },
> > > > > > +       [2] = { .gt_stepping = STEP_B1, .disp_stepping =
> > > > > > STEP_C0 },
> > > > > > +       [3] = { .gt_stepping = STEP_C0, .disp_stepping =
> > > > > > STEP_D0 },
> > > > > >  };
> > > > > > 
> > > > > >  /* Same GT stepping between tgl_uy_revids and tgl_revids
> > > > > > don't mean the same HW */
> > > > > > -const struct i915_rev_steppings tgl_revids[] = {
> > > > > > -       [0] = { .gt_stepping = TGL_REVID_A0, .disp_stepping
> > > > > > = TGL_REVID_B0 },
> > > > > > -       [1] = { .gt_stepping = TGL_REVID_B0, .disp_stepping
> > > > > > = TGL_REVID_D0 },
> > > > > > +const struct i915_rev_steppings tgl_revid_step_tbl[] = {
> > > > > > +       [0] = { .gt_stepping = STEP_A0, .disp_stepping =
> > > > > > STEP_B0 },
> > > > > > +       [1] = { .gt_stepping = STEP_B0, .disp_stepping =
> > > > > > STEP_D0 },
> > > > > >  };
> > > > > > 
> > > > > >  static void wa_init_start(struct i915_wa_list *wal, const
> > > > > > char *name, const char *engine_name)
> > > > > > @@ -1211,19 +1211,19 @@ tgl_gt_workarounds_init(struct
> > > > > > drm_i915_private *i915, struct i915_wa_list *wal)
> > > > > >         gen12_gt_workarounds_init(i915, wal);
> > > > > > 
> > > > > >         /* Wa_1409420604:tgl */
> > > > > > -       if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0,
> > > > > > TGL_REVID_A0))
> > > > > > +       if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
> > > > > >                 wa_write_or(wal,
> > > > > >                             SUBSLICE_UNIT_LEVEL_CLKGATE2,
> > > > > >                             CPSSUNIT_CLKGATE_DIS);
> > > > > > 
> > > > > >         /* Wa_1607087056:tgl also know as BUG:1409180338 */
> > > > > > -       if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0,
> > > > > > TGL_REVID_A0))
> > > > > > +       if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
> > > > > >                 wa_write_or(wal,
> > > > > >                             SLICE_UNIT_LEVEL_CLKGATE,
> > > > > >                             L3_CLKGATE_DIS |
> > > > > > L3_CR2X_CLKGATE_DIS);
> > > > > > 
> > > > > >         /* Wa_1408615072:tgl[a0] */
> > > > > > -       if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0,
> > > > > > TGL_REVID_A0))
> > > > > > +       if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
> > > > > >                 wa_write_or(wal,
> > > > > > UNSLICE_UNIT_LEVEL_CLKGATE2,
> > > > > >                             VSUNIT_CLKGATE_DIS_TGL);
> > > > > >  }
> > > > > > @@ -1700,7 +1700,7 @@ rcs_engine_wa_init(struct
> > > > > > intel_engine_cs *engine, struct i915_wa_list *wal)
> > > > > >         struct drm_i915_private *i915 = engine->i915;
> > > > > > 
> > > > > >         if (IS_DG1_REVID(i915, DG1_REVID_A0, DG1_REVID_A0)
> > > > > > ||
> > > > > > -           IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0,
> > > > > > TGL_REVID_A0)) {
> > > > > > +           IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
> > > > > > {
> > > > > >                 /*
> > > > > >                  * Wa_1607138336:tgl[a0],dg1[a0]
> > > > > >                  * Wa_1607063988:tgl[a0],dg1[a0]
> > > > > > @@ -1710,7 +1710,7 @@ rcs_engine_wa_init(struct
> > > > > > intel_engine_cs *engine, struct i915_wa_list *wal)
> > > > > >                            
> > > > > > GEN12_DISABLE_POSH_BUSY_FF_DOP_CG);
> > > > > >         }
> > > > > > 
> > > > > > -       if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0,
> > > > > > TGL_REVID_A0)) {
> > > > > > +       if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
> > > > > > {
> > > > > >                 /*
> > > > > >                  * Wa_1606679103:tgl
> > > > > >                  * (see also Wa_1606682166:icl)
> > > > > > diff --git a/drivers/gpu/drm/i915/i915_drv.h
> > > > > > b/drivers/gpu/drm/i915/i915_drv.h
> > > > > > index 5e5bcef20e33..11d6e8abde46 100644
> > > > > > --- a/drivers/gpu/drm/i915/i915_drv.h
> > > > > > +++ b/drivers/gpu/drm/i915/i915_drv.h
> > > > > > @@ -1559,54 +1559,54 @@ extern const struct
> > > > > > i915_rev_steppings kbl_revids[];
> > > > > >         (IS_JSL_EHL(p) && IS_REVID(p, since, until))
> > > > > > 
> > > > > >  enum {
> > > > > > -       TGL_REVID_A0,
> > > > > > -       TGL_REVID_B0,
> > > > > > -       TGL_REVID_B1,
> > > > > > -       TGL_REVID_C0,
> > > > > > -       TGL_REVID_D0,
> > > > > > +       STEP_A0,
> > > > > > +       STEP_B0,
> > > > > > +       STEP_B1,
> > > > > > +       STEP_C0,
> > > > > > +       STEP_D0,
> > > > > >  };
> > > > > > 
> > > > > > -#define TGL_UY_REVIDS_SIZE     4
> > > > > > -#define TGL_REVIDS_SIZE                2
> > > > > > +#define TGL_UY_REVID_STEP_TBL_SIZE     4
> > > > > > +#define TGL_REVID_STEP_TBL_SIZE                2
> > > > > > 
> > > > > > -extern const struct i915_rev_steppings
> > > > > > tgl_uy_revids[TGL_UY_REVIDS_SIZE];
> > > > > > -extern const struct i915_rev_steppings
> > > > > > tgl_revids[TGL_REVIDS_SIZE];
> > > > > > +extern const struct i915_rev_steppings
> > > > > > tgl_uy_revid_step_tbl[TGL_UY_REVID_STEP_TBL_SIZE];
> > > > > > +extern const struct i915_rev_steppings
> > > > > > tgl_revid_step_tbl[TGL_REVID_STEP_TBL_SIZE];
> > > > > > 
> > > > > >  static inline const struct i915_rev_steppings *
> > > > > > -tgl_revids_get(struct drm_i915_private *dev_priv)
> > > > > > +tgl_stepping_get(struct drm_i915_private *dev_priv)
> > > > > >  {
> > > > > >         u8 revid = INTEL_REVID(dev_priv);
> > > > > >         u8 size;
> > > > > > -       const struct i915_rev_steppings *tgl_revid_tbl;
> > > > > > +       const struct i915_rev_steppings *revid_step_tbl;
> > > > > > 
> > > > > >         if (IS_TGL_U(dev_priv) || IS_TGL_Y(dev_priv)) {
> > > > > > -               tgl_revid_tbl = tgl_uy_revids;
> > > > > > -               size = ARRAY_SIZE(tgl_uy_revids);
> > > > > > +               revid_step_tbl = tgl_uy_revid_step_tbl;
> > > > > > +               size = ARRAY_SIZE(tgl_uy_revid_step_tbl);
> > > > > >         } else {
> > > > > > -               tgl_revid_tbl = tgl_revids;
> > > > > > -               size = ARRAY_SIZE(tgl_revids);
> > > > > > +               revid_step_tbl = tgl_revid_step_tbl;
> > > > > > +               size = ARRAY_SIZE(tgl_revid_step_tbl);
> > > > > >         }
> > > > > > 
> > > > > >         revid = min_t(u8, revid, size - 1);
> > > > > > 
> > > > > > -       return &tgl_revid_tbl[revid];
> > > > > > +       return &revid_step_tbl[revid];
> > > > > >  }
> > > > > > 
> > > > > > -#define IS_TGL_DISP_REVID(p, since, until) \
> > > > > > +#define IS_TGL_DISP_STEPPING(p, since, until) \
> > > > > >         (IS_TIGERLAKE(p) && \
> > > > > > -        tgl_revids_get(p)->disp_stepping >= (since) && \
> > > > > > -        tgl_revids_get(p)->disp_stepping <= (until))
> > > > > > +        tgl_stepping_get(p)->disp_stepping >= (since) && \
> > > > > > +        tgl_stepping_get(p)->disp_stepping <= (until))
> > > > > > 
> > > > > > -#define IS_TGL_UY_GT_REVID(p, since, until) \
> > > > > > +#define IS_TGL_UY_GT_STEPPING(p, since, until) \
> > > > > >         ((IS_TGL_U(p) || IS_TGL_Y(p)) && \
> > > > > > -        tgl_revids_get(p)->gt_stepping >= (since) && \
> > > > > > -        tgl_revids_get(p)->gt_stepping <= (until))
> > > > > > +        tgl_stepping_get(p)->gt_stepping >= (since) && \
> > > > > > +        tgl_stepping_get(p)->gt_stepping <= (until))
> > > > > > 
> > > > > > -#define IS_TGL_GT_REVID(p, since, until) \
> > > > > > +#define IS_TGL_GT_STEPPING(p, since, until) \
> > > > > >         (IS_TIGERLAKE(p) && \
> > > > > >          !(IS_TGL_U(p) || IS_TGL_Y(p)) && \
> > > > > > -        tgl_revids_get(p)->gt_stepping >= (since) && \
> > > > > > -        tgl_revids_get(p)->gt_stepping <= (until))
> > > > > > +        tgl_stepping_get(p)->gt_stepping >= (since) && \
> > > > > > +        tgl_stepping_get(p)->gt_stepping <= (until))
> > > > > > 
> > > > > >  #define RKL_REVID_A0           0x0
> > > > > >  #define RKL_REVID_B0           0x1
> > > > > > diff --git a/drivers/gpu/drm/i915/intel_pm.c
> > > > > > b/drivers/gpu/drm/i915/intel_pm.c
> > > > > > index bbc73df7f753..319acca2630b 100644
> > > > > > --- a/drivers/gpu/drm/i915/intel_pm.c
> > > > > > +++ b/drivers/gpu/drm/i915/intel_pm.c
> > > > > > @@ -7110,7 +7110,7 @@ static void
> > > > > > tgl_init_clock_gating(struct drm_i915_private *dev_priv)
> > > > > >                    ILK_DPFC_CHICKEN_COMP_DUMMY_PIXEL);
> > > > > > 
> > > > > >         /* Wa_1409825376:tgl (pre-prod)*/
> > > > > > -       if (IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0,
> > > > > > TGL_REVID_B1))
> > > > > > +       if (IS_TGL_DISP_STEPPING(dev_priv, STEP_A0,
> > > > > > STEP_B1))
> > > > > >                 intel_uncore_write(&dev_priv->uncore,
> > > > > > GEN9_CLKGATE_DIS_3, intel_uncore_read(&dev_priv->uncore,
> > > > > > GEN9_CLKGATE_DIS_3) |
> > > > > >                            TGL_VRH_GATING_DIS);
> > > > > > 
> > > > > > --
> > > > > > 2.27.0
> > > > > > 
> > > 
> > > --
> > > Jani Nikula, Intel Open Source Graphics Center
> > 
> > -- 
> > Matt Roper
> > Graphics Software Engineer
> > VTT-OSGC Platform Enablement
> > Intel Corporation
> > (916) 356-2795

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