drm/komeda: Add component komeda_merger

Introduce a new component komeda_merger, because D71 HW supports to split
a whole image to two half parts and does the scaling independently. Merger
merges two separate results to one, and output it to compositor or wb_layer
For this patch:
- Add the definition of komeda_merger/merger_state
- Report and initialize komeda_merger according to the D71 HW.

v2: Rebase
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

drivers/gpu/drm/arm/display/komeda/d71/d71_component.c

@@ -767,6 +767,77 @@ static int d71_downscaling_clk_check(struct komeda_pipeline *pipe,
 	       0 : -EINVAL;
 }
 
+static void d71_merger_update(struct komeda_component *c,
+			      struct komeda_component_state *state)
+{
+	struct komeda_merger_state *st = to_merger_st(state);
+	u32 __iomem *reg = c->reg;
+	u32 index;
+
+	for_each_changed_input(state, index)
+		malidp_write32(reg, MG_INPUT_ID0 + index * 4,
+			       to_d71_input_id(&state->inputs[index]));
+
+	malidp_write32(reg, MG_SIZE, HV_SIZE(st->hsize_merged,
+					     st->vsize_merged));
+	malidp_write32(reg, BLK_CONTROL, BLK_CTRL_EN);
+}
+
+static void d71_merger_dump(struct komeda_component *c, struct seq_file *sf)
+{
+	u32 v;
+
+	dump_block_header(sf, c->reg);
+
+	get_values_from_reg(c->reg, MG_INPUT_ID0, 1, &v);
+	seq_printf(sf, "MG_INPUT_ID0:\t\t0x%X\n", v);
+
+	get_values_from_reg(c->reg, MG_INPUT_ID1, 1, &v);
+	seq_printf(sf, "MG_INPUT_ID1:\t\t0x%X\n", v);
+
+	get_values_from_reg(c->reg, BLK_CONTROL, 1, &v);
+	seq_printf(sf, "MG_CONTROL:\t\t0x%X\n", v);
+
+	get_values_from_reg(c->reg, MG_SIZE, 1, &v);
+	seq_printf(sf, "MG_SIZE:\t\t0x%X\n", v);
+}
+
+static const struct komeda_component_funcs d71_merger_funcs = {
+	.update		= d71_merger_update,
+	.disable	= d71_component_disable,
+	.dump_register	= d71_merger_dump,
+};
+
+static int d71_merger_init(struct d71_dev *d71,
+			   struct block_header *blk, u32 __iomem *reg)
+{
+	struct komeda_component *c;
+	struct komeda_merger *merger;
+	u32 pipe_id, comp_id;
+
+	get_resources_id(blk->block_info, &pipe_id, &comp_id);
+
+	c = komeda_component_add(&d71->pipes[pipe_id]->base, sizeof(*merger),
+				 comp_id,
+				 BLOCK_INFO_INPUT_ID(blk->block_info),
+				 &d71_merger_funcs,
+				 MG_NUM_INPUTS_IDS, get_valid_inputs(blk),
+				 MG_NUM_OUTPUTS_IDS, reg,
+				 "CU%d_MERGER", pipe_id);
+
+	if (IS_ERR(c)) {
+		DRM_ERROR("Failed to initialize merger.\n");
+		return PTR_ERR(c);
+	}
+
+	merger = to_merger(c);
+
+	set_range(&merger->hsize_merged, 4, 4032);
+	set_range(&merger->vsize_merged, 4, 4096);
+
+	return 0;
+}
+
 static void d71_improc_update(struct komeda_component *c,
 			      struct komeda_component_state *state)
 {
@@ -992,7 +1063,10 @@ int d71_probe_block(struct d71_dev *d71,
 		break;
 
 	case D71_BLK_TYPE_CU_SPLITTER:
+		break;
+
 	case D71_BLK_TYPE_CU_MERGER:
+		err = d71_merger_init(d71, blk, reg);
 		break;
 
 	case D71_BLK_TYPE_DOU:

drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c

@@ -91,6 +91,9 @@ komeda_pipeline_get_component_pos(struct komeda_pipeline *pipe, int id)
 	case KOMEDA_COMPONENT_SCALER1:
 		pos = to_cpos(pipe->scalers[id - KOMEDA_COMPONENT_SCALER0]);
 		break;
+	case KOMEDA_COMPONENT_MERGER:
+		pos = to_cpos(pipe->merger);
+		break;
 	case KOMEDA_COMPONENT_IPS0:
 	case KOMEDA_COMPONENT_IPS1:
 		temp = mdev->pipelines[id - KOMEDA_COMPONENT_IPS0];

drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h

@@ -276,6 +276,18 @@ struct komeda_compiz_state {
 	struct komeda_compiz_input_cfg cins[KOMEDA_COMPONENT_N_INPUTS];
 };
 
+struct komeda_merger {
+	struct komeda_component base;
+	struct malidp_range hsize_merged;
+	struct malidp_range vsize_merged;
+};
+
+struct komeda_merger_state {
+	struct komeda_component_state base;
+	u16 hsize_merged;
+	u16 vsize_merged;
+};
+
 struct komeda_improc {
 	struct komeda_component base;
 	u32 supported_color_formats;  /* DRM_RGB/YUV444/YUV420*/
@@ -357,6 +369,8 @@ struct komeda_pipeline {
 	struct komeda_scaler *scalers[KOMEDA_PIPELINE_MAX_SCALERS];
 	/** @compiz: compositor */
 	struct komeda_compiz *compiz;
+	/** @merger: merger */
+	struct komeda_merger *merger;
 	/** @wb_layer: writeback layer */
 	struct komeda_layer  *wb_layer;
 	/** @improc: post image processor */
@@ -399,12 +413,14 @@ struct komeda_pipeline_state {
 #define to_layer(c)	container_of(c, struct komeda_layer, base)
 #define to_compiz(c)	container_of(c, struct komeda_compiz, base)
 #define to_scaler(c)	container_of(c, struct komeda_scaler, base)
+#define to_merger(c)	container_of(c, struct komeda_merger, base)
 #define to_improc(c)	container_of(c, struct komeda_improc, base)
 #define to_ctrlr(c)	container_of(c, struct komeda_timing_ctrlr, base)
 
 #define to_layer_st(c)	container_of(c, struct komeda_layer_state, base)
 #define to_compiz_st(c)	container_of(c, struct komeda_compiz_state, base)
 #define to_scaler_st(c) container_of(c, struct komeda_scaler_state, base)
+#define to_merger_st(c) container_of(c, struct komeda_merger_state, base)
 #define to_improc_st(c)	container_of(c, struct komeda_improc_state, base)
 #define to_ctrlr_st(c)	container_of(c, struct komeda_timing_ctrlr_state, base)
 

drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c

@@ -146,6 +146,49 @@ static int komeda_compiz_obj_add(struct komeda_kms_dev *kms,
 	return 0;
 }
 
+static struct drm_private_state *
+komeda_merger_atomic_duplicate_state(struct drm_private_obj *obj)
+{
+	struct komeda_merger_state *st;
+
+	st = kmemdup(obj->state, sizeof(*st), GFP_KERNEL);
+	if (!st)
+		return NULL;
+
+	komeda_component_state_reset(&st->base);
+	__drm_atomic_helper_private_obj_duplicate_state(obj, &st->base.obj);
+
+	return &st->base.obj;
+}
+
+static void komeda_merger_atomic_destroy_state(struct drm_private_obj *obj,
+					       struct drm_private_state *state)
+{
+	kfree(to_merger_st(priv_to_comp_st(state)));
+}
+
+static const struct drm_private_state_funcs komeda_merger_obj_funcs = {
+	.atomic_duplicate_state	= komeda_merger_atomic_duplicate_state,
+	.atomic_destroy_state	= komeda_merger_atomic_destroy_state,
+};
+
+static int komeda_merger_obj_add(struct komeda_kms_dev *kms,
+				 struct komeda_merger *merger)
+{
+	struct komeda_merger_state *st;
+
+	st = kzalloc(sizeof(*st), GFP_KERNEL);
+	if (!st)
+		return -ENOMEM;
+
+	st->base.component = &merger->base;
+	drm_atomic_private_obj_init(&kms->base,
+				    &merger->base.obj, &st->base.obj,
+				    &komeda_merger_obj_funcs);
+
+	return 0;
+}
+
 static struct drm_private_state *
 komeda_improc_atomic_duplicate_state(struct drm_private_obj *obj)
 {
@@ -311,6 +354,12 @@ int komeda_kms_add_private_objs(struct komeda_kms_dev *kms,
 		if (err)
 			return err;
 
+		if (pipe->merger) {
+			err = komeda_merger_obj_add(kms, pipe->merger);
+			if (err)
+				return err;
+		}
+
 		err = komeda_improc_obj_add(kms, pipe->improc);
 		if (err)
 			return err;