Re: [PATCH 2/3] drm/komeda: Add split support for scaler

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On Fri, Jun 07, 2019 at 05:46:36PM +0800, Liviu Dudau wrote:
> Hi James,
> 
> On Mon, May 20, 2019 at 11:44:47AM +0100, james qian wang (Arm Technology China) wrote:
> > To achieve same caling effect compare with none split, the texel
> > calculation need to use the same scaling ratio before split, so add
> > "total_xxx" to pipeline to describe the hsize/vsize before split.
> > Update pipeline and d71_scaler_update accordingly.
> > 
> > Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@xxxxxxx>
> > ---
> >  .../arm/display/komeda/d71/d71_component.c    | 47 +++++++++++++++++--
> >  .../drm/arm/display/komeda/komeda_pipeline.h  | 19 ++++++--
> >  .../display/komeda/komeda_pipeline_state.c    | 21 ++++++++-
> >  .../gpu/drm/arm/display/komeda/komeda_plane.c |  8 ++--
> >  .../arm/display/komeda/komeda_wb_connector.c  |  2 +-
> >  5 files changed, 81 insertions(+), 16 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> > index 3266bd54c936..d101a5cc2766 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
> > @@ -642,23 +642,58 @@ static void d71_scaler_update(struct komeda_component *c,
> >  
> >  	malidp_write32(reg, BLK_IN_SIZE, HV_SIZE(st->hsize_in, st->vsize_in));
> >  	malidp_write32(reg, SC_OUT_SIZE, HV_SIZE(st->hsize_out, st->vsize_out));
> > +	malidp_write32(reg, SC_H_CROP, HV_CROP(st->left_crop, st->right_crop));
> > +
> > +	/* for right part, HW only sample the valid pixel which means the pixels
> > +	 * in left_crop will be jumpped, and the first sample pixel is:
> > +	 *
> > +	 * dst_a = st->total_hsize_out - st->hsize_out + st->left_crop + 0.5;
> > +	 *
> > +	 * Then the corresponding texel in src is:
> > +	 *
> > +	 * h_delta_phase = st->total_hsize_in / st->total_hsize_out;
> > +	 * src_a = dst_A * h_delta_phase;
> > +	 *
> > +	 * and h_init_phase is src_a deduct the real source start src_S;
> > +	 *
> > +	 * src_S = st->total_hsize_in - st->hsize_in;
> > +	 * h_init_phase = src_a - src_S;
> > +	 *
> > +	 * And HW precision for the initial/delta_phase is 16:16 fixed point,
> > +	 * the following is the simplified formula
> > +	 */
> > +	if (st->right_part) {
> > +		u32 dst_a = st->total_hsize_out - st->hsize_out + st->left_crop;
> > +
> > +		if (st->en_img_enhancement)
> > +			dst_a -= 1;
> > +
> > +		init_ph = ((st->total_hsize_in * (2 * dst_a + 1) -
> > +			    2 * st->total_hsize_out * (st->total_hsize_in -
> > +			    st->hsize_in)) << 15) / st->total_hsize_out;
> > +	} else {
> > +		init_ph = (st->total_hsize_in << 15) / st->total_hsize_out;
> > +	}
> >  
> > -	init_ph = (st->hsize_in << 15) / st->hsize_out;
> >  	malidp_write32(reg, SC_H_INIT_PH, init_ph);
> >  
> > -	delta_ph = (st->hsize_in << 16) / st->hsize_out;
> > +	delta_ph = (st->total_hsize_in << 16) / st->total_hsize_out;
> >  	malidp_write32(reg, SC_H_DELTA_PH, delta_ph);
> >  
> > -	init_ph = (st->vsize_in << 15) / st->vsize_out;
> > +	init_ph = (st->total_vsize_in << 15) / st->vsize_out;
> >  	malidp_write32(reg, SC_V_INIT_PH, init_ph);
> >  
> > -	delta_ph = (st->vsize_in << 16) / st->vsize_out;
> > +	delta_ph = (st->total_vsize_in << 16) / st->vsize_out;
> >  	malidp_write32(reg, SC_V_DELTA_PH, delta_ph);
> >  
> >  	ctrl = 0;
> >  	ctrl |= st->en_scaling ? SC_CTRL_SCL : 0;
> >  	ctrl |= st->en_alpha ? SC_CTRL_AP : 0;
> >  	ctrl |= st->en_img_enhancement ? SC_CTRL_IENH : 0;
> > +	/* If we use the hardware splitter we shouldn't set SC_CTRL_LS */
> > +	if (st->en_split &&
> > +	    state->inputs[0].component->id != KOMEDA_COMPONENT_SPLITTER)
> > +		ctrl |= SC_CTRL_LS;
> >  
> >  	malidp_write32(reg, BLK_CONTROL, ctrl);
> >  	malidp_write32(reg, BLK_INPUT_ID0, to_d71_input_id(&state->inputs[0]));
> > @@ -716,10 +751,12 @@ static int d71_scaler_init(struct d71_dev *d71,
> >  	}
> >  
> >  	scaler = to_scaler(c);
> > -	set_range(&scaler->hsize, 4, d71->max_line_size);
> > +	set_range(&scaler->hsize, 4, 2048);
> >  	set_range(&scaler->vsize, 4, 4096);
> >  	scaler->max_downscaling = 6;
> >  	scaler->max_upscaling = 64;
> > +	scaler->scaling_split_overlap = 8;
> > +	scaler->enh_split_overlap = 1;
> >  
> >  	malidp_write32(c->reg, BLK_CONTROL, 0);
> >  
> > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> > index c92733736799..4e1cf8fd89bf 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
> > @@ -247,15 +247,22 @@ struct komeda_scaler {
> >  	struct malidp_range hsize, vsize;
> >  	u32 max_upscaling;
> >  	u32 max_downscaling;
> > +	u8 scaling_split_overlap; /* split overlap for scaling */
> > +	u8 enh_split_overlap; /* split overlap for image enhancement */
> >  };
> >  
> >  struct komeda_scaler_state {
> >  	struct komeda_component_state base;
> >  	u16 hsize_in, vsize_in;
> >  	u16 hsize_out, vsize_out;
> > +	u16 total_hsize_in, total_vsize_in;
> > +	u16 total_hsize_out; /* total_xxxx are size before split */
> > +	u16 left_crop, right_crop;
> >  	u8 en_scaling : 1,
> >  	   en_alpha : 1, /* enable alpha processing */
> > -	   en_img_enhancement : 1;
> > +	   en_img_enhancement : 1,
> > +	   en_split : 1,
> > +	   right_part; /* right part of split image */
> 
> Should right_part be a 1 bit value here, same as in komeda_data_flow_cfg ?
>

Yes, it should be a 1 bit value, will correct it

James

> >  };
> >  
> >  struct komeda_compiz {
> > @@ -323,11 +330,16 @@ struct komeda_data_flow_cfg {
> >  	struct komeda_component_output input;
> >  	u16 in_x, in_y, in_w, in_h;
> >  	u32 out_x, out_y, out_w, out_h;
> > +	u16 total_in_h, total_in_w;
> > +	u16 total_out_w;
> > +	u16 left_crop, right_crop, overlap;
> >  	u32 rot;
> >  	int blending_zorder;
> >  	u8 pixel_blend_mode, layer_alpha;
> >  	u8 needs_scaling : 1,
> > -	   needs_img_enhancement : 1;
> > +	   needs_img_enhancement : 1,
> > +	   needs_split : 1,
> > +	   right_part : 1; /* right part of display image if split enabled */
> >  };
> >  
> >  /** struct komeda_pipeline_funcs */
> > @@ -488,6 +500,7 @@ void komeda_pipeline_disable(struct komeda_pipeline *pipe,
> >  void komeda_pipeline_update(struct komeda_pipeline *pipe,
> >  			    struct drm_atomic_state *old_state);
> >  
> > -void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow);
> > +void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow,
> > +				   struct drm_framebuffer *fb);
> >  
> >  #endif /* _KOMEDA_PIPELINE_H_*/
> > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> > index fcd34164b3c2..9657dbfe0210 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
> > @@ -489,11 +489,19 @@ komeda_scaler_validate(void *user,
> >  	st->hsize_in = dflow->in_w;
> >  	st->vsize_in = dflow->in_h;
> >  	st->hsize_out = dflow->out_w;
> > -	st->vsize_out = dflow->out_w;
> > +	st->vsize_out = dflow->out_h;
> > +	st->right_crop = dflow->right_crop;
> > +	st->left_crop = dflow->left_crop;
> > +	st->total_vsize_in = dflow->total_in_h;
> > +	st->total_hsize_in = dflow->total_in_w;
> > +	st->total_hsize_out = dflow->total_out_w;
> > +
> >  	st->en_scaling = dflow->needs_scaling;
> >  	/* Enable alpha processing if the next stage needs the pixel alpha */
> >  	st->en_alpha = dflow->pixel_blend_mode != DRM_MODE_BLEND_PIXEL_NONE;
> >  	st->en_img_enhancement = dflow->needs_img_enhancement;
> > +	st->en_split = dflow->needs_split;
> > +	st->right_part = dflow->right_part;
> >  
> >  	komeda_component_add_input(&st->base, &dflow->input, 0);
> >  	komeda_component_set_output(&dflow->input, &scaler->base, 0);
> > @@ -647,14 +655,23 @@ komeda_timing_ctrlr_validate(struct komeda_timing_ctrlr *ctrlr,
> >  	return 0;
> >  }
> >  
> > -void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow)
> > +void komeda_complete_data_flow_cfg(struct komeda_data_flow_cfg *dflow,
> > +				   struct drm_framebuffer *fb)
> >  {
> >  	u32 w = dflow->in_w;
> >  	u32 h = dflow->in_h;
> >  
> > +	dflow->total_in_w = dflow->in_w;
> > +	dflow->total_in_h = dflow->in_h;
> > +	dflow->total_out_w = dflow->out_w;
> > +
> >  	if (drm_rotation_90_or_270(dflow->rot))
> >  		swap(w, h);
> >  
> > +	/* if format doesn't have alpha, fix blend mode to PIXEL_NONE */
> > +	if (!fb->format->has_alpha)
> > +		dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
> > +
> >  	dflow->needs_scaling = (w != dflow->out_w) || (h != dflow->out_h);
> >  }
> >  
> > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> > index aad766365bbb..75ef0e6c5d98 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_plane.c
> > @@ -22,10 +22,7 @@ komeda_plane_init_data_flow(struct drm_plane_state *st,
> >  	memset(dflow, 0, sizeof(*dflow));
> >  
> >  	dflow->blending_zorder = st->normalized_zpos;
> > -
> > -	/* if format doesn't have alpha, fix blend mode to PIXEL_NONE */
> > -	dflow->pixel_blend_mode = fb->format->has_alpha ?
> > -			st->pixel_blend_mode : DRM_MODE_BLEND_PIXEL_NONE;
> > +	dflow->pixel_blend_mode = st->pixel_blend_mode;
> >  	dflow->layer_alpha = st->alpha >> 8;
> >  
> >  	dflow->out_x = st->crtc_x;
> > @@ -46,9 +43,10 @@ komeda_plane_init_data_flow(struct drm_plane_state *st,
> >  							fb->modifier));
> >  		return -EINVAL;
> >  	}
> > +
> >  	dflow->needs_img_enhancement = kplane_st->img_enhancement;
> >  
> > -	komeda_complete_data_flow_cfg(dflow);
> > +	komeda_complete_data_flow_cfg(dflow, fb);
> >  
> >  	return 0;
> >  }
> > diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> > index eed521218ef3..20295291572f 100644
> > --- a/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> > +++ b/drivers/gpu/drm/arm/display/komeda/komeda_wb_connector.c
> > @@ -31,7 +31,7 @@ komeda_wb_init_data_flow(struct komeda_layer *wb_layer,
> >  	dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE;
> >  	dflow->rot = DRM_MODE_ROTATE_0;
> >  
> > -	komeda_complete_data_flow_cfg(dflow);
> > +	komeda_complete_data_flow_cfg(dflow, fb);
> >  
> >  	return 0;
> >  }
> > -- 
> > 2.17.1
> > 
> 
> Otherwise: Reviewed-by: Liviu Dudau <liviu.dudau@xxxxxxx>
> 
> Best regards,
> Liviu
> 
> 
> -- 
> ====================
> | I would like to |
> | fix the world,  |
> | but they're not |
> | giving me the   |
>  \ source code!  /
>   ---------------
>     ¯\_(ツ)_/¯
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