[Intel-gfx] [PATCH v4 3/3] drm/i915/display: Program PSR2 selective fetch registers
Souza, Jose
jose.souza at intel.com
Thu Oct 1 17:14:38 UTC 2020
On Thu, 2020-10-01 at 12:24 +0100, Mun, Gwan-gyeong wrote:
> On Thu, 2020-09-24 at 10:42 -0700, José Roberto de Souza wrote:
> > Another step towards PSR2 selective fetch, here programming plane
> > selective fetch registers and MAN_TRK_CTL enabling selective fetch
> > but
> > for now it is fetching the whole area of the planes.
> > The damaged area calculation will come as next and final step.
> >
> > v2:
> > - removed warn on when no plane is visible in state
> > - removed calculations using plane damaged area in
> > intel_psr2_program_plane_sel_fetch()
> >
> > v3:
> > - do not shift 16 positions the plane dst coordinates, only src is
> > shifted
> >
> > v4:
> > - only setting PLANE_SEL_FETCH_CTL_ENABLE and MCURSOR_MODE in
> > PLANE_SEL_FETCH_CTL
> >
> > BSpec: 55229
> > Cc: Gwan-gyeong Mun <
> > gwan-gyeong.mun at intel.com
> > >
> > Cc: Ville Syrjälä <
> > ville.syrjala at linux.intel.com
> > >
> > Signed-off-by: José Roberto de Souza <
> > jose.souza at intel.com
> > >
> > ---
> > drivers/gpu/drm/i915/display/intel_display.c | 10 +-
> > drivers/gpu/drm/i915/display/intel_psr.c | 118
> > ++++++++++++++++++-
> > drivers/gpu/drm/i915/display/intel_psr.h | 10 +-
> > drivers/gpu/drm/i915/display/intel_sprite.c | 3 +
> > 4 files changed, 132 insertions(+), 9 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> > b/drivers/gpu/drm/i915/display/intel_display.c
> > index 5a9d933e425a..96bc515497c1 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -11812,6 +11812,9 @@ static void i9xx_update_cursor(struct
> > intel_plane *plane,
> > if (INTEL_GEN(dev_priv) >= 9)
> > skl_write_cursor_wm(plane, crtc_state);
> >
> > + if (!needs_modeset(crtc_state))
> > + intel_psr2_program_plane_sel_fetch(plane, crtc_state,
> > plane_state, 0);
> > +
> > if (plane->cursor.base != base ||
> > plane->cursor.size != fbc_ctl ||
> > plane->cursor.cntl != cntl) {
> > @@ -12823,8 +12826,11 @@ static int intel_crtc_atomic_check(struct
> > intel_atomic_state *state,
> >
> > }
> >
> > - if (!mode_changed)
> > - intel_psr2_sel_fetch_update(state, crtc);
> > + if (!mode_changed) {
> > + ret = intel_psr2_sel_fetch_update(state, crtc);
> > + if (ret)
> > + return ret;
> > + }
> >
> > return 0;
> > }
> > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> > b/drivers/gpu/drm/i915/display/intel_psr.c
> > index 02f74b0ddec1..f6e0a192d5e5 100644
> > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > @@ -1166,6 +1166,39 @@ static void psr_force_hw_tracking_exit(struct
> > drm_i915_private *dev_priv)
> > intel_psr_exit(dev_priv);
> > }
> >
> > +void intel_psr2_program_plane_sel_fetch(struct intel_plane *plane,
> > + const struct intel_crtc_state
> > *crtc_state,
> > + const struct intel_plane_state
> > *plane_state,
> > + int color_plane)
> > +{
> > + struct drm_i915_private *dev_priv = to_i915(plane->base.dev);
> > + enum pipe pipe = plane->pipe;
> > + u32 val;
> > +
> > + if (!crtc_state->enable_psr2_sel_fetch)
> > + return;
> > +
> > + val = plane_state ? plane_state->ctl : 0;
> > + val = plane->id == PLANE_CURSOR ? val & MCURSOR_MODE :
> > + val &
> > PLANE_SEL_FETCH_CTL_ENABLE;
>
> I could not find details of MCURSOR_MODE for selective_fetch. (on bspec
> 50420) why do you set MCURSOR_MODE here?
Bsepc: 55229
SEL_FETCH_CUR_CTL Cursor Mode Select = If update region, translated to pipe source coordinates, overlaps this cursor ? CUR_CTL Cursor Mode Select :
Disable
Oh and I missed this: Program the other fields in SEL_FETCH_CUR_CTL to match CUR_CTL.
So the v3 version of this patch is better, unless you still think that SEL_FETCH_PLANE_CTL only needs to have the bit 31 set, like I said spares are
different than reserved, we can set spares.
>
> > + intel_de_write_fw(dev_priv, PLANE_SEL_FETCH_CTL(pipe, plane-
> > > id), val);
> >
> > + if (!val || plane->id == PLANE_CURSOR)
> > + return;
> > +
>
> in order to set just PLANE_SEL_FETCH_CTL_ENABLE bit, I suggest to use
> like this
> val = intel_de_read_fw(dev_priv, PLANE_SEL_FETCH_CTL(pipe, plane-
> > id));
>
> intel_de_write_fw(dev_priv, PLANE_SEL_FETCH_CTL(pipe, plane->id),
> val|PLANE_SEL_FETCH_CTL_ENABLE);
All the plane and pipe programming must be fast to not evade vblank, so registers reads are not a good idea here.
Also why? plane_state->ctl will have the same value as the register for gen11+.
>
> > + val = plane_state->uapi.dst.y1 << 16 | plane_state-
> > > uapi.dst.x1;
> >
> > + intel_de_write_fw(dev_priv, PLANE_SEL_FETCH_POS(pipe, plane-
> > > id), val);
> >
> > +
> > + val = plane_state->color_plane[color_plane].y << 16;
> > + val |= plane_state->color_plane[color_plane].x;
> > + intel_de_write_fw(dev_priv, PLANE_SEL_FETCH_OFFSET(pipe, plane-
> > > id),
> >
> > + val);
> > +
> > + /* Sizes are 0 based */
> > + val = ((drm_rect_height(&plane_state->uapi.src) >> 16) - 1) <<
> > 16;
> > + val |= (drm_rect_width(&plane_state->uapi.src) >> 16) - 1;
> > + intel_de_write_fw(dev_priv, PLANE_SEL_FETCH_SIZE(pipe, plane-
> > > id), val);
> >
> > +}
> > +
> > void intel_psr2_program_trans_man_trk_ctl(const struct
> > intel_crtc_state *crtc_state)
> > {
> > struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> > @@ -1180,16 +1213,91 @@ void
> > intel_psr2_program_trans_man_trk_ctl(const struct intel_crtc_state
> > *crtc_st
> > crtc_state->psr2_man_track_ctl);
> > }
> >
> > -void intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
> > - struct intel_crtc *crtc)
> > +static void psr2_man_trk_ctl_calc(struct intel_crtc_state
> > *crtc_state,
> > + struct drm_rect *clip, bool
> > full_update)
> > +{
> > + u32 val = PSR2_MAN_TRK_CTL_ENABLE;
> > +
> > + if (full_update) {
> > + val |= PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
> > + goto exit;
> > + }
> > +
> > + if (clip->y1 == -1)
> > + goto exit;
> > +
> > + val |= PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE;
> > + val |= PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1 / 4 + 1);
> > + val |= PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(DIV_ROUND_UP(clip-
> > > y2, 4) + 1);
> >
> > +exit:
> > + crtc_state->psr2_man_track_ctl = val;
> > +}
> > +
> > +static void clip_area_update(struct drm_rect *overlap_damage_area,
> > + struct drm_rect *damage_area)
> > +{
> > + if (overlap_damage_area->y1 == -1) {
> > + overlap_damage_area->y1 = damage_area->y1;
> > + overlap_damage_area->y2 = damage_area->y2;
> > + return;
> > + }
> > +
> > + if (damage_area->y1 < overlap_damage_area->y1)
> > + overlap_damage_area->y1 = damage_area->y1;
> > +
> > + if (damage_area->y2 > overlap_damage_area->y2)
> > + overlap_damage_area->y2 = damage_area->y2;
> > +}
> > +
> > +int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
> > + struct intel_crtc *crtc)
> > {
> > struct intel_crtc_state *crtc_state =
> > intel_atomic_get_new_crtc_state(state, crtc);
> > + struct intel_plane_state *new_plane_state, *old_plane_state;
> > + struct drm_rect pipe_clip = { .y1 = -1 };
> > + struct intel_plane *plane;
> > + bool full_update = false;
> > + int i, ret;
> >
> > if (!crtc_state->enable_psr2_sel_fetch)
> > - return;
> > + return 0;
> > +
> > + ret = drm_atomic_add_affected_planes(&state->base, &crtc-
> > > base);
> >
> > + if (ret)
> > + return ret;
> > +
> > + for_each_oldnew_intel_plane_in_state(state, plane,
> > old_plane_state,
> > + new_plane_state, i) {
> > + struct drm_rect temp;
> > +
> > + if (new_plane_state->uapi.crtc != crtc_state-
> > > uapi.crtc)
> >
> > + continue;
> >
> > - crtc_state->psr2_man_track_ctl = PSR2_MAN_TRK_CTL_ENABLE |
> > - PSR2_MAN_TRK_CTL_SF_SINGLE_FUL
> > L_FRAME;
> > + /*
> > + * TODO: Not clear how to handle planes with negative
> > position,
> > + * also planes are not updated if they have a negative
> > X
> > + * position so for now doing a full update in this
> > cases
> > + */
> > + if (new_plane_state->uapi.dst.y1 < 0 ||
> > + new_plane_state->uapi.dst.x1 < 0) {
> > + full_update = true;
> > + break;
> > + }
> > +
> > + if (!new_plane_state->uapi.visible)
> > + continue;
> > +
> > + /*
> > + * For now doing a selective fetch in the whole plane
> > area,
> > + * optimizations will come in the future.
> > + */
> > + temp.y1 = new_plane_state->uapi.dst.y1;
> > + temp.y2 = new_plane_state->uapi.dst.y2;
> > + clip_area_update(&pipe_clip, &temp);
> > + }
> > +
> > + psr2_man_trk_ctl_calc(crtc_state, &pipe_clip, full_update);
> > + return 0;
> > }
> >
> > /**
> > diff --git a/drivers/gpu/drm/i915/display/intel_psr.h
> > b/drivers/gpu/drm/i915/display/intel_psr.h
> > index 6a83c8e682e6..3eca9dcec3c0 100644
> > --- a/drivers/gpu/drm/i915/display/intel_psr.h
> > +++ b/drivers/gpu/drm/i915/display/intel_psr.h
> > @@ -15,6 +15,8 @@ struct intel_crtc_state;
> > struct intel_dp;
> > struct intel_crtc;
> > struct intel_atomic_state;
> > +struct intel_plane_state;
> > +struct intel_plane;
> >
> > #define CAN_PSR(dev_priv) (HAS_PSR(dev_priv) && dev_priv-
> > > psr.sink_support)
> >
> > void intel_psr_init_dpcd(struct intel_dp *intel_dp);
> > @@ -45,8 +47,12 @@ void intel_psr_atomic_check(struct drm_connector
> > *connector,
> > struct drm_connector_state *old_state,
> > struct drm_connector_state *new_state);
> > void intel_psr_set_force_mode_changed(struct intel_dp *intel_dp);
> > -void intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
> > - struct intel_crtc *crtc);
> > +int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
> > + struct intel_crtc *crtc);
> > void intel_psr2_program_trans_man_trk_ctl(const struct
> > intel_crtc_state *crtc_state);
> > +void intel_psr2_program_plane_sel_fetch(struct intel_plane *plane,
> > + const struct intel_crtc_state
> > *crtc_state,
> > + const struct intel_plane_state
> > *plane_state,
> > + int color_plane);
> >
> > #endif /* __INTEL_PSR_H__ */
> > diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c
> > b/drivers/gpu/drm/i915/display/intel_sprite.c
> > index 63040cb0d4e1..f12425b90607 100644
> > --- a/drivers/gpu/drm/i915/display/intel_sprite.c
> > +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
> > @@ -690,6 +690,9 @@ skl_program_plane(struct intel_plane *plane,
> > intel_de_write_fw(dev_priv, PLANE_AUX_OFFSET(pipe,
> > plane_id),
> > (plane_state->color_plane[1].y << 16)
> > > plane_state->color_plane[1].x);
> >
> >
> > + if (!drm_atomic_crtc_needs_modeset(&crtc_state->uapi))
> > + intel_psr2_program_plane_sel_fetch(plane, crtc_state,
> > plane_state, color_plane);
> > +
> > /*
> > * The control register self-arms if the plane was previously
> > * disabled. Try to make the plane enable atomic by writing
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