drm/komeda: komeda_dev/pipeline/component definition and initialzation

1. Added a brief definition of komeda_dev/pipeline/component, this change
   didn't add the detailed component features and capabilities, which will
   be added in the following changes.
2. Corresponding resources discovery and initialzation functions.

Changes in v4:
- Deleted unnecessary headers

Changes in v3:
- Fixed style problem found by checkpatch.pl --strict.

Changes in v2:
- Unified abbreviation of "pipeline" to "pipe".

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

1 files changed, 196 insertions, 0 deletions

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
new file mode 100644
index 000000000000..179122fc93ff
--- /dev/null
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
@@ -0,0 +1,196 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
+ * Author: James.Qian.Wang <james.qian.wang@arm.com>
+ *
+ */
+#include "komeda_dev.h"
+#include "komeda_pipeline.h"
+
+/** komeda_pipeline_add - Add a pipeline to &komeda_dev */
+struct komeda_pipeline *
+komeda_pipeline_add(struct komeda_dev *mdev, size_t size,
+		    struct komeda_pipeline_funcs *funcs)
+{
+	struct komeda_pipeline *pipe;
+
+	if (mdev->n_pipelines + 1 > KOMEDA_MAX_PIPELINES) {
+		DRM_ERROR("Exceed max support %d pipelines.\n",
+			  KOMEDA_MAX_PIPELINES);
+		return NULL;
+	}
+
+	if (size < sizeof(*pipe)) {
+		DRM_ERROR("Request pipeline size too small.\n");
+		return NULL;
+	}
+
+	pipe = devm_kzalloc(mdev->dev, size, GFP_KERNEL);
+	if (!pipe)
+		return NULL;
+
+	pipe->mdev = mdev;
+	pipe->id   = mdev->n_pipelines;
+	pipe->funcs = funcs;
+
+	mdev->pipelines[mdev->n_pipelines] = pipe;
+	mdev->n_pipelines++;
+
+	return pipe;
+}
+
+void komeda_pipeline_destroy(struct komeda_dev *mdev,
+			     struct komeda_pipeline *pipe)
+{
+	struct komeda_component *c;
+	int i;
+
+	dp_for_each_set_bit(i, pipe->avail_comps) {
+		c = komeda_pipeline_get_component(pipe, i);
+		komeda_component_destroy(mdev, c);
+	}
+
+	clk_put(pipe->pxlclk);
+	clk_put(pipe->aclk);
+
+	devm_kfree(mdev->dev, pipe);
+}
+
+struct komeda_component **
+komeda_pipeline_get_component_pos(struct komeda_pipeline *pipe, int id)
+{
+	struct komeda_dev *mdev = pipe->mdev;
+	struct komeda_pipeline *temp = NULL;
+	struct komeda_component **pos = NULL;
+
+	switch (id) {
+	case KOMEDA_COMPONENT_LAYER0:
+	case KOMEDA_COMPONENT_LAYER1:
+	case KOMEDA_COMPONENT_LAYER2:
+	case KOMEDA_COMPONENT_LAYER3:
+		pos = to_cpos(pipe->layers[id - KOMEDA_COMPONENT_LAYER0]);
+		break;
+	case KOMEDA_COMPONENT_WB_LAYER:
+		pos = to_cpos(pipe->wb_layer);
+		break;
+	case KOMEDA_COMPONENT_COMPIZ0:
+	case KOMEDA_COMPONENT_COMPIZ1:
+		temp = mdev->pipelines[id - KOMEDA_COMPONENT_COMPIZ0];
+		if (!temp) {
+			DRM_ERROR("compiz-%d doesn't exist.\n", id);
+			return NULL;
+		}
+		pos = to_cpos(temp->compiz);
+		break;
+	case KOMEDA_COMPONENT_SCALER0:
+	case KOMEDA_COMPONENT_SCALER1:
+		pos = to_cpos(pipe->scalers[id - KOMEDA_COMPONENT_SCALER0]);
+		break;
+	case KOMEDA_COMPONENT_IPS0:
+	case KOMEDA_COMPONENT_IPS1:
+		temp = mdev->pipelines[id - KOMEDA_COMPONENT_IPS0];
+		if (!temp) {
+			DRM_ERROR("ips-%d doesn't exist.\n", id);
+			return NULL;
+		}
+		pos = to_cpos(temp->improc);
+		break;
+	case KOMEDA_COMPONENT_TIMING_CTRLR:
+		pos = to_cpos(pipe->ctrlr);
+		break;
+	default:
+		pos = NULL;
+		DRM_ERROR("Unknown pipeline resource ID: %d.\n", id);
+		break;
+	}
+
+	return pos;
+}
+
+struct komeda_component *
+komeda_pipeline_get_component(struct komeda_pipeline *pipe, int id)
+{
+	struct komeda_component **pos = NULL;
+	struct komeda_component *c = NULL;
+
+	pos = komeda_pipeline_get_component_pos(pipe, id);
+	if (pos)
+		c = *pos;
+
+	return c;
+}
+
+/** komeda_component_add - Add a component to &komeda_pipeline */
+struct komeda_component *
+komeda_component_add(struct komeda_pipeline *pipe,
+		     size_t comp_sz, u32 id, u32 hw_id,
+		     struct komeda_component_funcs *funcs,
+		     u8 max_active_inputs, u32 supported_inputs,
+		     u8 max_active_outputs, u32 __iomem *reg,
+		     const char *name_fmt, ...)
+{
+	struct komeda_component **pos;
+	struct komeda_component *c;
+	int idx, *num = NULL;
+
+	if (max_active_inputs > KOMEDA_COMPONENT_N_INPUTS) {
+		WARN(1, "please large KOMEDA_COMPONENT_N_INPUTS to %d.\n",
+		     max_active_inputs);
+		return NULL;
+	}
+
+	pos = komeda_pipeline_get_component_pos(pipe, id);
+	if (!pos || (*pos))
+		return NULL;
+
+	if (has_bit(id, KOMEDA_PIPELINE_LAYERS)) {
+		idx = id - KOMEDA_COMPONENT_LAYER0;
+		num = &pipe->n_layers;
+		if (idx != pipe->n_layers) {
+			DRM_ERROR("please add Layer by id sequence.\n");
+			return NULL;
+		}
+	} else if (has_bit(id,  KOMEDA_PIPELINE_SCALERS)) {
+		idx = id - KOMEDA_COMPONENT_SCALER0;
+		num = &pipe->n_scalers;
+		if (idx != pipe->n_scalers) {
+			DRM_ERROR("please add Scaler by id sequence.\n");
+			return NULL;
+		}
+	}
+
+	c = devm_kzalloc(pipe->mdev->dev, comp_sz, GFP_KERNEL);
+	if (!c)
+		return NULL;
+
+	c->id = id;
+	c->hw_id = hw_id;
+	c->reg = reg;
+	c->pipeline = pipe;
+	c->max_active_inputs = max_active_inputs;
+	c->max_active_outputs = max_active_outputs;
+	c->supported_inputs = supported_inputs;
+	c->funcs = funcs;
+
+	if (name_fmt) {
+		va_list args;
+
+		va_start(args, name_fmt);
+		vsnprintf(c->name, sizeof(c->name), name_fmt, args);
+		va_end(args);
+	}
+
+	if (num)
+		*num = *num + 1;
+
+	pipe->avail_comps |= BIT(c->id);
+	*pos = c;
+
+	return c;
+}
+
+void komeda_component_destroy(struct komeda_dev *mdev,
+			      struct komeda_component *c)
+{
+	devm_kfree(mdev->dev, c);
+}