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Subject[PATCH v2 1/2] drm/komeda: Add new component komeda_splitter
Date
Similar to Layer Split, but Splitter is used for writeback, which splits
the compiz result to two half parts and then feed them to two scalers.

v2: Rebase

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
---
.../arm/display/komeda/d71/d71_component.c | 63 +++++++++++++++++++
.../drm/arm/display/komeda/komeda_pipeline.c | 3 +
.../drm/arm/display/komeda/komeda_pipeline.h | 19 +++++-
.../arm/display/komeda/komeda_private_obj.c | 50 +++++++++++++++
4 files changed, 133 insertions(+), 2 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 f40fdd175479..4b19a9aefa90 100644
--- a/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
+++ b/drivers/gpu/drm/arm/display/komeda/d71/d71_component.c
@@ -808,6 +808,68 @@ static int d71_downscaling_clk_check(struct komeda_pipeline *pipe,
0 : -EINVAL;
}

+static void d71_splitter_update(struct komeda_component *c,
+ struct komeda_component_state *state)
+{
+ struct komeda_splitter_state *st = to_splitter_st(state);
+ u32 __iomem *reg = c->reg;
+
+ malidp_write32(reg, BLK_INPUT_ID0, to_d71_input_id(state, 0));
+ malidp_write32(reg, BLK_SIZE, HV_SIZE(st->hsize, st->vsize));
+ malidp_write32(reg, SP_OVERLAP_SIZE, st->overlap & 0x1FFF);
+ malidp_write32(reg, BLK_CONTROL, BLK_CTRL_EN);
+}
+
+static void d71_splitter_dump(struct komeda_component *c, struct seq_file *sf)
+{
+ u32 v[3];
+
+ dump_block_header(sf, c->reg);
+
+ get_values_from_reg(c->reg, BLK_INPUT_ID0, 1, v);
+ seq_printf(sf, "SP_INPUT_ID0:\t\t0x%X\n", v[0]);
+
+ get_values_from_reg(c->reg, BLK_CONTROL, 3, v);
+ seq_printf(sf, "SP_CONTROL:\t\t0x%X\n", v[0]);
+ seq_printf(sf, "SP_SIZE:\t\t0x%X\n", v[1]);
+ seq_printf(sf, "SP_OVERLAP_SIZE:\t0x%X\n", v[2]);
+}
+
+static const struct komeda_component_funcs d71_splitter_funcs = {
+ .update = d71_splitter_update,
+ .disable = d71_component_disable,
+ .dump_register = d71_splitter_dump,
+};
+
+static int d71_splitter_init(struct d71_dev *d71,
+ struct block_header *blk, u32 __iomem *reg)
+{
+ struct komeda_component *c;
+ struct komeda_splitter *splitter;
+ 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(*splitter),
+ comp_id,
+ BLOCK_INFO_INPUT_ID(blk->block_info),
+ &d71_splitter_funcs,
+ 1, get_valid_inputs(blk), 2, reg,
+ "CU%d_SPLITTER", pipe_id);
+
+ if (IS_ERR(c)) {
+ DRM_ERROR("Failed to initialize splitter");
+ return -1;
+ }
+
+ splitter = to_splitter(c);
+
+ set_range(&splitter->hsize, 4, d71->max_line_size);
+ set_range(&splitter->vsize, 4, d71->max_vsize);
+
+ return 0;
+}
+
static void d71_merger_update(struct komeda_component *c,
struct komeda_component_state *state)
{
@@ -1102,6 +1164,7 @@ int d71_probe_block(struct d71_dev *d71,
break;

case D71_BLK_TYPE_CU_SPLITTER:
+ err = d71_splitter_init(d71, blk, reg);
break;

case D71_BLK_TYPE_CU_MERGER:
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
index eb9e0c0af8f3..c0130f1fac44 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
+++ b/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_SPLITTER:
+ pos = to_cpos(pipe->splitter);
+ break;
case KOMEDA_COMPONENT_MERGER:
pos = to_cpos(pipe->merger);
break;
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
index f6a4a51cb5f7..b6fed54b1cf1 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.h
@@ -301,6 +301,17 @@ struct komeda_merger_state {
u16 vsize_merged;
};

+struct komeda_splitter {
+ struct komeda_component base;
+ struct malidp_range hsize, vsize;
+};
+
+struct komeda_splitter_state {
+ struct komeda_component_state base;
+ u16 hsize, vsize;
+ u16 overlap;
+};
+
struct komeda_improc {
struct komeda_component base;
u32 supported_color_formats; /* DRM_RGB/YUV444/YUV420*/
@@ -388,6 +399,8 @@ struct komeda_pipeline {
struct komeda_scaler *scalers[KOMEDA_PIPELINE_MAX_SCALERS];
/** @compiz: compositor */
struct komeda_compiz *compiz;
+ /** @splitter: for split the compiz output to two half data flows */
+ struct komeda_splitter *splitter;
/** @merger: merger */
struct komeda_merger *merger;
/** @wb_layer: writeback layer */
@@ -432,14 +445,16 @@ 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_splitter(c) container_of(c, struct komeda_splitter, 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_scaler_st(c) container_of(c, struct komeda_scaler_state, base)
+#define to_splitter_st(c) container_of(c, struct komeda_splitter_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)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c b/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c
index 0f4e1f601ce0..914400c4af73 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_private_obj.c
@@ -146,6 +146,50 @@ static int komeda_compiz_obj_add(struct komeda_kms_dev *kms,
return 0;
}

+static struct drm_private_state *
+komeda_splitter_atomic_duplicate_state(struct drm_private_obj *obj)
+{
+ struct komeda_splitter_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_splitter_atomic_destroy_state(struct drm_private_obj *obj,
+ struct drm_private_state *state)
+{
+ kfree(to_splitter_st(priv_to_comp_st(state)));
+}
+
+static const struct drm_private_state_funcs komeda_splitter_obj_funcs = {
+ .atomic_duplicate_state = komeda_splitter_atomic_duplicate_state,
+ .atomic_destroy_state = komeda_splitter_atomic_destroy_state,
+};
+
+static int komeda_splitter_obj_add(struct komeda_kms_dev *kms,
+ struct komeda_splitter *splitter)
+{
+ struct komeda_splitter_state *st;
+
+ st = kzalloc(sizeof(*st), GFP_KERNEL);
+ if (!st)
+ return -ENOMEM;
+
+ st->base.component = &splitter->base;
+ drm_atomic_private_obj_init(&kms->base,
+ &splitter->base.obj, &st->base.obj,
+ &komeda_splitter_obj_funcs);
+
+ return 0;
+}
+
static struct drm_private_state *
komeda_merger_atomic_duplicate_state(struct drm_private_obj *obj)
{
@@ -354,6 +398,12 @@ int komeda_kms_add_private_objs(struct komeda_kms_dev *kms,
if (err)
return err;

+ if (pipe->splitter) {
+ err = komeda_splitter_obj_add(kms, pipe->splitter);
+ if (err)
+ return err;
+ }
+
if (pipe->merger) {
err = komeda_merger_obj_add(kms, pipe->merger);
if (err)
--
2.17.1
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