[Intel-gfx] [PATCH v4 3/3] drm/i915/display: Program PSR2 selective fetch registers

Mun, Gwan-gyeong gwan-gyeong.mun at intel.com
Thu Oct 1 11:24:45 UTC 2020


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?

> +	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);

> +	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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