RE: [3/5] drm/i915/display: Enable the second scaler for sharpness

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> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Nemesa
> Garg
> Sent: Monday, July 8, 2024 1:39 PM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Garg, Nemesa <nemesa.garg@xxxxxxxxx>
> Subject: [3/5] drm/i915/display: Enable the second scaler for sharpness
> 
> As only second scaler can be used for sharpness check if it is available and if
> panel fitting is also not enabled, the set the sharpness. Panel fitting will have
> the preference over sharpness property.
Can you reframe the commit message, it's a bit difficult to understand.

> 
> v2: Added the panel fitting check before enabling sharpness
> 
> Signed-off-by: Nemesa Garg <nemesa.garg@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/display/intel_display.c  | 10 ++-
>  .../drm/i915/display/intel_display_types.h    |  1 +
>  .../drm/i915/display/intel_modeset_verify.c   |  1 +
>  drivers/gpu/drm/i915/display/intel_panel.c    |  4 +-
>  .../drm/i915/display/intel_sharpen_filter.c   | 10 +++
>  .../drm/i915/display/intel_sharpen_filter.h   |  1 +
>  drivers/gpu/drm/i915/display/skl_scaler.c     | 84 +++++++++++++++++--
>  drivers/gpu/drm/i915/display/skl_scaler.h     |  1 +
>  8 files changed, 99 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index a62560a0c1a9..385a254528f9 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -2028,7 +2028,7 @@ static void get_crtc_power_domains(struct
> intel_crtc_state *crtc_state,
>  	set_bit(POWER_DOMAIN_PIPE(pipe), mask->bits);
>  	set_bit(POWER_DOMAIN_TRANSCODER(cpu_transcoder), mask->bits);
>  	if (crtc_state->pch_pfit.enabled ||
> -	    crtc_state->pch_pfit.force_thru)
> +	    crtc_state->pch_pfit.force_thru ||
> +crtc_state->hw.casf_params.need_scaler)
>  		set_bit(POWER_DOMAIN_PIPE_PANEL_FITTER(pipe), mask-
> >bits);
> 
>  	drm_for_each_encoder_mask(encoder, &dev_priv->drm, @@ -2284,7
> +2284,7 @@ static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state
> *crtc_state)
>  	 * PF-ID we'll need to adjust the pixel_rate here.
>  	 */
> 
> -	if (!crtc_state->pch_pfit.enabled)
> +	if (!crtc_state->pch_pfit.enabled ||
> +crtc_state->hw.casf_params.need_scaler)
>  		return pixel_rate;
> 
>  	drm_rect_init(&src, 0, 0,
> @@ -4295,7 +4295,8 @@ static int intel_crtc_atomic_check(struct
> intel_atomic_state *state,
> 
>  	if (DISPLAY_VER(dev_priv) >= 9) {
>  		if (intel_crtc_needs_modeset(crtc_state) ||
> -		    intel_crtc_needs_fastset(crtc_state)) {
> +		    intel_crtc_needs_fastset(crtc_state) ||
> +		    crtc_state->hw.casf_params.need_scaler) {
>  			ret = skl_update_scaler_crtc(crtc_state);
>  			if (ret)
>  				return ret;
> @@ -5481,6 +5482,9 @@ intel_pipe_config_compare(const struct
> intel_crtc_state *current_config,
>  		PIPE_CONF_CHECK_BOOL(cmrr.enable);
>  	}
> 
> +	if (pipe_config->uapi.sharpness_strength > 0)
> +		PIPE_CONF_CHECK_BOOL(hw.casf_params.need_scaler);
> +
>  #undef PIPE_CONF_CHECK_X
>  #undef PIPE_CONF_CHECK_I
>  #undef PIPE_CONF_CHECK_LLI
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 1c3e031ab369..130740aaaa21 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -834,6 +834,7 @@ struct intel_sharpness_filter {
>  	u32 scaler_coefficient[119];
>  	bool strength_changed;
>  	u8 win_size;
> +	bool need_scaler;
Always for sharpness filter scaler is required, so does this need_scaler make sense?
Rather should we not check for sharpness_filter enabled?

>  };
> 
>  struct intel_crtc_scaler_state {
> diff --git a/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> b/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> index 3491db5cad31..ed75934bed6b 100644
> --- a/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> +++ b/drivers/gpu/drm/i915/display/intel_modeset_verify.c
> @@ -177,6 +177,7 @@ verify_crtc_state(struct intel_atomic_state *state,
>  		    crtc->base.name);
> 
>  	hw_crtc_state->hw.enable = sw_crtc_state->hw.enable;
> +	hw_crtc_state->hw.casf_params.need_scaler =
> +sw_crtc_state->hw.casf_params.need_scaler;
> 
>  	intel_crtc_get_pipe_config(hw_crtc_state);
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_panel.c
> b/drivers/gpu/drm/i915/display/intel_panel.c
> index 71454ddef20f..bfc725d2e178 100644
> --- a/drivers/gpu/drm/i915/display/intel_panel.c
> +++ b/drivers/gpu/drm/i915/display/intel_panel.c
> @@ -451,7 +451,9 @@ static int pch_panel_fitting(struct intel_crtc_state
> *crtc_state,
> 
>  	drm_rect_init(&crtc_state->pch_pfit.dst,
>  		      x, y, width, height);
> -	crtc_state->pch_pfit.enabled = true;
> +
> +	if (!crtc_state->hw.casf_params.need_scaler)
> +		crtc_state->pch_pfit.enabled = true;
> 
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
> b/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
> index b3ebd72b4116..627a0dbd3dfd 100644
> --- a/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
> +++ b/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
> @@ -36,6 +36,16 @@ void intel_sharpness_filter_enable(struct intel_crtc_state
> *crtc_state)
>  		intel_de_write_fw(dev_priv, GLK_PS_COEF_DATA_SET(crtc-
> >pipe, id, 1),
>  				  crtc_state->hw.casf_params.
> scaler_coefficient[index]);
>  	}
> +
> +	casf_scaler_enable(crtc_state);
> +}
> +
> +int intel_filter_compute_config(struct intel_crtc_state *crtc_state) {
> +	if (!crtc_state->pch_pfit.enabled)
> +		crtc_state->hw.casf_params.need_scaler = true;
> +
> +	return 0;
>  }
> 
>  static void convert_sharpness_coef_binary(struct scaler_filter_coeff *coeff, diff
> --git a/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
> b/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
> index 6ab70a635e2f..d20e65971a55 100644
> --- a/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
> +++ b/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
> @@ -23,5 +23,6 @@ struct scaler_filter_coeff {
> 
>  void intel_sharpness_filter_enable(struct intel_crtc_state *crtc_state);  void
> intel_sharpness_scaler_compute_config(struct intel_crtc_state *crtc_state);
> +int intel_filter_compute_config(struct intel_crtc_state *crtc_state);
> 
>  #endif /* __INTEL_SHARPEN_FILTER_H__ */ diff --git
> a/drivers/gpu/drm/i915/display/skl_scaler.c
> b/drivers/gpu/drm/i915/display/skl_scaler.c
> index baa601d27815..9d8bc6c0ab2c 100644
> --- a/drivers/gpu/drm/i915/display/skl_scaler.c
> +++ b/drivers/gpu/drm/i915/display/skl_scaler.c
> @@ -253,7 +253,8 @@ int skl_update_scaler_crtc(struct intel_crtc_state
> *crtc_state)
>  				 drm_rect_width(&crtc_state->pipe_src),
>  				 drm_rect_height(&crtc_state->pipe_src),
>  				 width, height, NULL, 0,
> -				 crtc_state->pch_pfit.enabled);
> +				 crtc_state->pch_pfit.enabled ||
> +				 crtc_state->hw.casf_params.need_scaler);
>  }
> 
>  /**
> @@ -353,9 +354,10 @@ static int intel_atomic_setup_scaler(struct
> intel_crtc_scaler_state *scaler_stat
>  				     int num_scalers_need, struct intel_crtc
> *intel_crtc,
>  				     const char *name, int idx,
>  				     struct intel_plane_state *plane_state,
> -				     int *scaler_id)
> +				     int *scaler_id, bool casf_scaler)
>  {
>  	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
> +	struct intel_crtc_state *crtc_state =
> +to_intel_crtc_state(intel_crtc->base.state);
>  	int j;
>  	u32 mode;
> 
> @@ -365,6 +367,11 @@ static int intel_atomic_setup_scaler(struct
> intel_crtc_scaler_state *scaler_stat
>  			if (scaler_state->scalers[j].in_use)
>  				continue;
> 
> +			if (!strcmp(name, "CRTC")) {
> +				if (casf_scaler && j != 1)
Should the scaler id used for sharpness filter be stored and the same be used here to check if its in use?

> +					continue;
> +			}
> +
>  			*scaler_id = j;
>  			scaler_state->scalers[*scaler_id].in_use = 1;
>  			break;
> @@ -375,6 +382,10 @@ static int intel_atomic_setup_scaler(struct
> intel_crtc_scaler_state *scaler_stat
>  		     "Cannot find scaler for %s:%d\n", name, idx))
>  		return -EINVAL;
> 
> +	if (crtc_state->hw.casf_params.need_scaler) {
> +		mode = SKL_PS_SCALER_MODE_HQ;
> +	}
> +
>  	/* set scaler mode */
>  	if (plane_state && plane_state->hw.fb &&
>  	    plane_state->hw.fb->format->is_yuv && @@ -598,7 +609,8 @@ int
> intel_atomic_setup_scalers(struct drm_i915_private *dev_priv,
> 
>  		ret = intel_atomic_setup_scaler(scaler_state,
> num_scalers_need,
>  						intel_crtc, name, idx,
> -						plane_state, scaler_id);
> +						plane_state, scaler_id,
> +						crtc_state-
> >hw.casf_params.need_scaler);
>  		if (ret < 0)
>  			return ret;
>  	}
> @@ -678,6 +690,15 @@ static void glk_program_nearest_filter_coefs(struct
> drm_i915_private *dev_priv,
>  	intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(pipe, id, set), 0);
> }
> 
> +static u32 scaler_filter_select(void)
> +{
> +	return (PS_FILTER_PROGRAMMED |
> +			PS_Y_VERT_FILTER_SELECT(1) |
> +			PS_Y_HORZ_FILTER_SELECT(0) |
> +			PS_UV_VERT_FILTER_SELECT(1) |
> +			PS_UV_HORZ_FILTER_SELECT(0));
> +}
This looks to be a constant value, can it be a macro?

> +
>  static u32 skl_scaler_get_filter_select(enum drm_scaling_filter filter, int set)  {
>  	if (filter == DRM_SCALING_FILTER_NEAREST_NEIGHBOR) { @@ -705,6
> +726,48 @@ static void skl_scaler_setup_filter(struct drm_i915_private
> *dev_priv, enum pipe
>  	}
>  }
> 
> +void casf_scaler_enable(struct intel_crtc_state *crtc_state) {
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);

dev_priv => i915

> +	struct drm_display_mode *adjusted_mode =
> +		&crtc_state->hw.adjusted_mode;
> +	struct intel_crtc_scaler_state *scaler_state =
> +		&crtc_state->scaler_state;
> +	struct drm_rect src, dest;
> +	int id, width, height;
> +	int x, y;
> +	enum pipe pipe = crtc->pipe;
> +	u32 ps_ctrl;
> +
> +	width = adjusted_mode->crtc_hdisplay;
> +	height = adjusted_mode->crtc_vdisplay;
> +
> +	x = y = 0;
> +	drm_rect_init(&dest, x, y, width, height);
> +
> +	struct drm_rect *dst = &dest;
Declaration to be in the beginning of the function.
Also I don't see the value of dst being changed and dest being used elsewhere in this function. In that case why is a copy of dest made?

> +
> +	x = dst->x1;
> +	y = dst->y1;
> +	width = drm_rect_width(dst);
> +	height = drm_rect_height(dst);
> +	id = scaler_state->scaler_id;
> +
> +	drm_rect_init(&src, 0, 0,
> +		      drm_rect_width(&crtc_state->pipe_src) << 16,
> +		      drm_rect_height(&crtc_state->pipe_src) << 16);
> +
> +	ps_ctrl = PS_SCALER_EN | PS_BINDING_PIPE | scaler_state-
> >scalers[id].mode |
> +		PS_BYPASS_ARMING | PS_DB_STALL | scaler_filter_select();
> +
> +	intel_de_write_fw(dev_priv, SKL_PS_CTRL(pipe, id), ps_ctrl);
> +	intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(pipe, id),
> +			  PS_WIN_XPOS(x) | PS_WIN_YPOS(y));
> +	intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(pipe, id),
> +			  PS_WIN_XSIZE(width) | PS_WIN_YSIZE(height)); }
> +
>  void skl_pfit_enable(const struct intel_crtc_state *crtc_state)  {
>  	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> @@ -875,16 +938,19 @@ void skl_scaler_get_config(struct intel_crtc_state
> *crtc_state)
>  			continue;
> 
>  		id = i;
> -		crtc_state->pch_pfit.enabled = true;
> +
> +		if (!crtc_state->hw.casf_params.need_scaler)
> +			crtc_state->pch_pfit.enabled = true;
> 
>  		pos = intel_de_read(dev_priv, SKL_PS_WIN_POS(crtc->pipe, i));
>  		size = intel_de_read(dev_priv, SKL_PS_WIN_SZ(crtc->pipe, i));
> 
> -		drm_rect_init(&crtc_state->pch_pfit.dst,
> -			      REG_FIELD_GET(PS_WIN_XPOS_MASK, pos),
> -			      REG_FIELD_GET(PS_WIN_YPOS_MASK, pos),
> -			      REG_FIELD_GET(PS_WIN_XSIZE_MASK, size),
> -			      REG_FIELD_GET(PS_WIN_YSIZE_MASK, size));
> +		if (!crtc_state->hw.casf_params.need_scaler)
> +			drm_rect_init(&crtc_state->pch_pfit.dst,
> +				      REG_FIELD_GET(PS_WIN_XPOS_MASK,
> pos),
> +				      REG_FIELD_GET(PS_WIN_YPOS_MASK,
> pos),
> +				      REG_FIELD_GET(PS_WIN_XSIZE_MASK,
> size),
> +				      REG_FIELD_GET(PS_WIN_YSIZE_MASK,
> size));
> 
>  		scaler_state->scalers[i].in_use = true;
>  		break;
> diff --git a/drivers/gpu/drm/i915/display/skl_scaler.h
> b/drivers/gpu/drm/i915/display/skl_scaler.h
> index 63f93ca03c89..444527e6a15b 100644
> --- a/drivers/gpu/drm/i915/display/skl_scaler.h
> +++ b/drivers/gpu/drm/i915/display/skl_scaler.h
> @@ -33,5 +33,6 @@ void skl_detach_scalers(const struct intel_crtc_state
> *crtc_state);  void skl_scaler_disable(const struct intel_crtc_state
> *old_crtc_state);
> 
>  void skl_scaler_get_config(struct intel_crtc_state *crtc_state);
> +void casf_scaler_enable(struct intel_crtc_state *crtc_state);
> 
>  #endif
> --
> 2.25.1

Thanks and Regards,
Arun R Murthy
--------------------




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