[PATCH v8, 06/17] media: mtk-vcodec: Manage multi hardware information

[Yunfei Dong <yunfei.dong@mediatek.com>]

Manage each hardware information which includes irq/power/clk.
The hardware includes LAT0, LAT1 and CORE.

Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
---
v8: fix many comments
---
 drivers/media/platform/mtk-vcodec/Makefile    |   5 +-
 .../platform/mtk-vcodec/mtk_vcodec_dec_drv.c  | 119 +++++++++----
 .../platform/mtk-vcodec/mtk_vcodec_dec_hw.c   | 166 ++++++++++++++++++
 .../platform/mtk-vcodec/mtk_vcodec_dec_hw.h   |  51 ++++++
 .../mtk-vcodec/mtk_vcodec_dec_stateful.c      |   1 +
 .../mtk-vcodec/mtk_vcodec_dec_stateless.c     |   2 +
 .../platform/mtk-vcodec/mtk_vcodec_drv.h      |  23 +++
 7 files changed, 334 insertions(+), 33 deletions(-)
 create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.c
 create mode 100644 drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.h

diff --git a/drivers/media/platform/mtk-vcodec/Makefile b/drivers/media/platform/mtk-vcodec/Makefile
index 5d36e05535d7..95feb793c287 100644
--- a/drivers/media/platform/mtk-vcodec/Makefile
+++ b/drivers/media/platform/mtk-vcodec/Makefile
@@ -3,7 +3,8 @@
 obj-$(CONFIG_VIDEO_MEDIATEK_VCODEC) += mtk-vcodec-dec.o \
 				       mtk-vcodec-enc.o \
 				       mtk-vcodec-common.o \
-				       mtk-vcodec-dec-common.o
+				       mtk-vcodec-dec-common.o \
+				       mtk-vcodec-dec-hw.o
 
 mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
 		vdec/vdec_vp8_if.o \
@@ -16,6 +17,8 @@ mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
 		mtk_vcodec_dec_stateful.o \
 		mtk_vcodec_dec_stateless.o \
 
+mtk-vcodec-dec-hw-y := mtk_vcodec_dec_hw.o
+
 mtk-vcodec-dec-common-y := mtk_vcodec_dec_pm.o
 
 mtk-vcodec-enc-y := venc/venc_vp8_if.o \
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
index b7a51e96d4ba..f29b8564045c 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
@@ -18,19 +18,49 @@
 
 #include "mtk_vcodec_drv.h"
 #include "mtk_vcodec_dec.h"
+#include "mtk_vcodec_dec_hw.h"
 #include "mtk_vcodec_dec_pm.h"
 #include "mtk_vcodec_intr.h"
-#include "mtk_vcodec_util.h"
 #include "mtk_vcodec_fw.h"
 
-#define VDEC_HW_ACTIVE	0x10
-#define VDEC_IRQ_CFG	0x11
-#define VDEC_IRQ_CLR	0x10
-#define VDEC_IRQ_CFG_REG	0xa4
-
 module_param(mtk_v4l2_dbg_level, int, 0644);
 module_param(mtk_vcodec_dbg, bool, 0644);
 
+static int mtk_vcodec_comp_device_check(struct mtk_vcodec_ctx *ctx)
+ {
+	struct mtk_vcodec_dev *vdec_dev = ctx->dev;
+	struct platform_device *pdev = vdec_dev->plat_dev;
+	struct device_node *comp_node;
+	enum mtk_vdec_hw_id comp_idx;
+	const struct of_device_id *of_id;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mtk_vdec_hw_match); i++) {
+		of_id = &mtk_vdec_hw_match[i];
+		comp_node = of_find_compatible_node(NULL, NULL,
+			of_id->compatible);
+		if (!comp_node)
+			continue;
+
+		if (!of_device_is_available(comp_node)) {
+			of_node_put(comp_node);
+			dev_err(&pdev->dev, "Fail to get MMSYS node\n");
+			continue;
+		}
+
+		comp_idx = (enum mtk_vdec_hw_id)of_id->data;
+		vdec_dev->component_node[comp_idx] = comp_node;
+
+		if (!test_bit(comp_idx, vdec_dev->hardware_bitmap)) {
+			dev_err(&pdev->dev, "Vdec comp_idx is not ready %d.",
+				comp_idx);
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
 static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
 {
 	struct mtk_vcodec_dev *dev = priv;
@@ -95,6 +125,41 @@ static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev)
 	return 0;
 }
 
+static int mtk_vcodec_init_dec_params(struct mtk_vcodec_dev *dev)
+{
+	struct platform_device *pdev = dev->plat_dev;
+	int ret;
+
+	ret = mtk_vcodec_get_reg_bases(dev);
+	if (ret)
+		return ret;
+
+	if (!dev->vdec_pdata->is_subdev_supported) {
+		dev->dec_irq = platform_get_irq(pdev, 0);
+		if (dev->dec_irq < 0) {
+			dev_err(&pdev->dev, "failed to get irq number");
+			return dev->dec_irq;
+		}
+
+		irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
+		ret = devm_request_irq(&pdev->dev, dev->dec_irq,
+			mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to install dev->dec_irq %d (%d)",
+				dev->dec_irq, ret);
+			return ret;
+		}
+
+		ret = mtk_vcodec_init_dec_pm(pdev, &dev->pm);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "failed to get mt vcodec clock source");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
 static int fops_vcodec_open(struct file *file)
 {
 	struct mtk_vcodec_dev *dev = video_drvdata(file);
@@ -116,6 +181,12 @@ static int fops_vcodec_open(struct file *file)
 	init_waitqueue_head(&ctx->queue);
 	mutex_init(&ctx->lock);
 
+	ret = mtk_vcodec_comp_device_check(ctx);
+	if (ret) {
+		mtk_v4l2_err("Failed to check vdec comp device.");
+		goto err_ctrls_setup;
+	}
+
 	ctx->type = MTK_INST_DECODER;
 	ret = dev->vdec_pdata->ctrls_setup(ctx);
 	if (ret) {
@@ -220,7 +291,6 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 {
 	struct mtk_vcodec_dev *dev;
 	struct video_device *vfd_dec;
-	struct resource *res;
 	phandle rproc_phandle;
 	enum mtk_vcodec_fw_type fw_type;
 	int ret;
@@ -249,32 +319,10 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 	if (IS_ERR(dev->fw_handler))
 		return PTR_ERR(dev->fw_handler);
 
-	ret = mtk_vcodec_init_dec_pm(dev->plat_dev, &dev->pm);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
-		goto err_dec_pm;
-	}
-
-	ret = mtk_vcodec_get_reg_bases(dev);
-	if (ret)
-		goto err_res;
-
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "failed to get irq resource");
-		ret = -ENOENT;
-		goto err_res;
-	}
-
-	dev->dec_irq = platform_get_irq(pdev, 0);
-	irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
-	ret = devm_request_irq(&pdev->dev, dev->dec_irq,
-			mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
+	ret = mtk_vcodec_init_dec_params(dev);
 	if (ret) {
-		dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
-			dev->dec_irq,
-			ret);
-		goto err_res;
+		dev_err(&pdev->dev, "Failed to init pm and registers");
+		goto err_dec_pm;
 	}
 
 	mutex_init(&dev->dec_mutex);
@@ -329,6 +377,13 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 		goto err_event_workq;
 	}
 
+	ret = of_platform_populate(pdev->dev.of_node, NULL, NULL,
+		&pdev->dev);
+	if (ret) {
+		mtk_v4l2_err("Master device of_platform_populate failed.");
+		goto err_event_workq;
+	}
+
 	if (dev->vdec_pdata->uses_stateless_api) {
 		dev->mdev_dec.dev = &pdev->dev;
 		strscpy(dev->mdev_dec.model, MTK_VCODEC_DEC_NAME,
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.c
new file mode 100644
index 000000000000..b34e4996facb
--- /dev/null
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.c
@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Author: Yunfei Dong <yunfei.dong@mediatek.com>
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+
+#include "mtk_vcodec_drv.h"
+#include "mtk_vcodec_dec.h"
+#include "mtk_vcodec_dec_hw.h"
+#include "mtk_vcodec_dec_pm.h"
+#include "mtk_vcodec_intr.h"
+#include "mtk_vcodec_util.h"
+
+const struct of_device_id mtk_vdec_hw_match[] = {
+	{
+		.compatible = "mediatek,mtk-vcodec-lat",
+		.data = (void *)MTK_VDEC_LAT0,
+	},
+	{
+		.compatible = "mediatek,mtk-vcodec-core",
+		.data = (void *)MTK_VDEC_CORE,
+	},
+	{},
+};
+EXPORT_SYMBOL_GPL(mtk_vdec_hw_match);
+
+MODULE_DEVICE_TABLE(of, mtk_vdec_hw_match);
+
+static irqreturn_t mtk_vdec_hw_irq_handler(int irq, void *priv)
+{
+	struct mtk_vdec_hw_dev *dev = priv;
+	struct mtk_vcodec_ctx *ctx;
+	u32 cg_status;
+	unsigned int dec_done_status;
+	void __iomem *vdec_misc_addr = dev->reg_base[VDEC_COMP_MISC] +
+					VDEC_IRQ_CFG_REG;
+
+	ctx = mtk_vcodec_get_curr_ctx(dev->master_dev);
+
+	/* check if HW active or not */
+	cg_status = readl(dev->reg_base[VDEC_COMP_SYS]);
+	if (cg_status & VDEC_HW_ACTIVE) {
+		mtk_v4l2_err("vdec active is not 0x0 (0x%08x)",
+			cg_status);
+		return IRQ_HANDLED;
+	}
+
+	dec_done_status = readl(vdec_misc_addr);
+	if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
+	    MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
+		return IRQ_HANDLED;
+
+	/* clear interrupt */
+	writel(dec_done_status | VDEC_IRQ_CFG, vdec_misc_addr);
+	writel(dec_done_status & ~VDEC_IRQ_CLR, vdec_misc_addr);
+
+	wake_up_ctx(ctx, MTK_INST_IRQ_RECEIVED);
+
+	mtk_v4l2_debug(3, "wake up ctx %d, dec_done_status=%x",
+		ctx->id, dec_done_status);
+
+	return IRQ_HANDLED;
+}
+
+static int mtk_vdec_hw_init_irq(struct mtk_vdec_hw_dev *dev)
+{
+	struct platform_device *pdev = dev->plat_dev;
+	int ret;
+
+	dev->dec_irq = platform_get_irq(pdev, 0);
+	if (dev->dec_irq < 0) {
+		dev_err(&pdev->dev, "Failed to get irq resource");
+		return dev->dec_irq;
+	}
+
+	irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
+	ret = devm_request_irq(&pdev->dev, dev->dec_irq,
+				mtk_vdec_hw_irq_handler, 0, pdev->name, dev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
+			dev->dec_irq, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int mtk_vdec_hw_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_vdec_hw_dev *comp_dev;
+	struct mtk_vcodec_dev *master_dev;
+	const struct of_device_id *of_id;
+	int comp_idx;
+	int ret;
+
+	if (!dev->parent)
+		return -EPROBE_DEFER;
+
+	master_dev = dev_get_drvdata(dev->parent);
+	if (!master_dev)
+		return -EPROBE_DEFER;
+
+	comp_dev = devm_kzalloc(dev, sizeof(*comp_dev), GFP_KERNEL);
+	if (!comp_dev)
+		return -ENOMEM;
+
+	comp_dev->plat_dev = pdev;
+	ret = mtk_vcodec_init_dec_pm(pdev, &comp_dev->pm);
+	if (ret)
+		return ret;
+
+	comp_dev->reg_base[VDEC_COMP_MISC] =
+		devm_platform_ioremap_resource_byname(pdev, "misc");
+	if (IS_ERR((__force void *)comp_dev->reg_base[VDEC_COMP_MISC])) {
+		ret = PTR_ERR((__force void *)comp_dev->reg_base[VDEC_COMP_MISC]);
+		goto err;
+	}
+
+	ret = mtk_vdec_hw_init_irq(comp_dev);
+	if (ret)
+		goto err;
+
+	of_id = of_match_device(mtk_vdec_hw_match, dev);
+	if (!of_id) {
+		dev_err(dev, "Can't get vdec comp device id.\n");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	comp_idx = (enum mtk_vdec_hw_id)of_id->data;
+	if (comp_idx < MTK_VDEC_HW_MAX) {
+		master_dev->comp_dev[comp_idx] = comp_dev;
+		comp_dev->comp_idx = comp_idx;
+		comp_dev->master_dev = master_dev;
+		comp_dev->reg_base[VDEC_COMP_SYS] =
+			master_dev->reg_base[VDEC_COMP_SYS];
+		set_bit(comp_dev->comp_idx, master_dev->hardware_bitmap);
+	}
+
+	platform_set_drvdata(pdev, comp_dev);
+	return 0;
+err:
+	mtk_vcodec_release_dec_pm(&comp_dev->pm);
+	return ret;
+}
+
+static struct platform_driver mtk_vdec_driver = {
+	.probe	= mtk_vdec_hw_probe,
+	.driver	= {
+		.name	= "mtk-vdec-comp",
+		.of_match_table = mtk_vdec_hw_match,
+	},
+};
+
+module_platform_driver(mtk_vdec_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Mediatek video decoder hardware driver");
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.h
new file mode 100644
index 000000000000..7adebe95ed44
--- /dev/null
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_hw.h
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ * Author: Yunfei Dong <yunfei.dong@mediatek.com>
+ */
+
+#ifndef _MTK_VCODEC_DEC_HW_H_
+#define _MTK_VCODEC_DEC_HW_H_
+
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include "mtk_vcodec_drv.h"
+
+#define VDEC_HW_ACTIVE 0x10
+#define VDEC_IRQ_CFG 0x11
+#define VDEC_IRQ_CLR 0x10
+#define VDEC_IRQ_CFG_REG 0xa4
+
+extern const struct of_device_id mtk_vdec_hw_match[MTK_VDEC_HW_MAX];
+
+/**
+ * enum mtk_comp_hw_reg_idx - component register base index
+ */
+enum mtk_comp_hw_reg_idx {
+	VDEC_COMP_SYS,
+	VDEC_COMP_MISC,
+	VDEC_COMP_MAX
+};
+
+/**
+ * struct mtk_vdec_hw_dev - vdec hardware driver data
+ * @plat_dev: platform device
+ * @master_dev: master device
+ * @reg_base: Mapped address of MTK Vcodec registers.
+ *
+ * @dec_irq: decoder irq resource
+ * @pm: power management control
+ * @comp_idx: each hardware index
+ */
+struct mtk_vdec_hw_dev {
+	struct platform_device *plat_dev;
+	struct mtk_vcodec_dev *master_dev;
+	void __iomem *reg_base[VDEC_COMP_MAX];
+
+	int dec_irq;
+	struct mtk_vcodec_pm pm;
+	int comp_idx;
+};
+
+#endif /* _MTK_VCODEC_DEC_HW_H_ */
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateful.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateful.c
index bef49244e61b..c7f9259ad094 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateful.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateful.c
@@ -625,4 +625,5 @@ const struct mtk_vcodec_dec_pdata mtk_vdec_8173_pdata = {
 	.num_framesizes = NUM_SUPPORTED_FRAMESIZE,
 	.worker = mtk_vdec_worker,
 	.flush_decoder = mtk_vdec_flush_decoder,
+	.is_subdev_supported = false,
 };
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateless.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateless.c
index 26e4d6f4ec04..2d285515b625 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateless.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_stateless.c
@@ -357,6 +357,7 @@ const struct mtk_vcodec_dec_pdata mtk_vdec_8183_pdata = {
 	.uses_stateless_api = true,
 	.worker = mtk_vdec_worker,
 	.flush_decoder = mtk_vdec_flush_decoder,
+	.is_subdev_supported = false,
 };
 
 const struct mtk_vcodec_dec_pdata mtk_lat_sig_core_pdata = {
@@ -373,4 +374,5 @@ const struct mtk_vcodec_dec_pdata mtk_lat_sig_core_pdata = {
 	.uses_stateless_api = true,
 	.worker = mtk_vdec_worker,
 	.flush_decoder = mtk_vdec_flush_decoder,
+	.is_subdev_supported = true,
 };
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
index 0fa9d85114b9..0457ebd8ac18 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h
@@ -93,6 +93,17 @@ enum mtk_fmt_type {
 	MTK_FMT_FRAME = 2,
 };
 
+/**
+ * struct mtk_vdec_hw_id - Hardware index used to separate
+ *                         different hardware
+ */
+enum mtk_vdec_hw_id {
+	MTK_VDEC_CORE,
+	MTK_VDEC_LAT0,
+	MTK_VDEC_LAT1,
+	MTK_VDEC_HW_MAX,
+};
+
 /*
  * struct mtk_video_fmt - Structure used to store information about pixelformats
  */
@@ -332,6 +343,7 @@ enum mtk_chip {
  *
  * @chip: chip this decoder is compatible with
  *
+ * @is_subdev_supported: whether support parent-node architecture(subdev)
  * @uses_stateless_api: whether the decoder uses the stateless API with requests
  */
 
@@ -353,6 +365,7 @@ struct mtk_vcodec_dec_pdata {
 
 	enum mtk_chip chip;
 
+	bool is_subdev_supported;
 	bool uses_stateless_api;
 };
 
@@ -423,6 +436,11 @@ struct mtk_vcodec_enc_pdata {
  * @pm: power management control
  * @dec_capability: used to identify decode capability, ex: 4k
  * @enc_capability: used to identify encode capability
+ *
+ * @comp_dev: component hardware device
+ * @component_node: component node
+ *
+ * @hardware_bitmap: used to record hardware is ready or not
  */
 struct mtk_vcodec_dev {
 	struct v4l2_device v4l2_dev;
@@ -460,6 +478,11 @@ struct mtk_vcodec_dev {
 	struct mtk_vcodec_pm pm;
 	unsigned int dec_capability;
 	unsigned int enc_capability;
+
+	void *comp_dev[MTK_VDEC_HW_MAX];
+	struct device_node *component_node[MTK_VDEC_HW_MAX];
+
+	DECLARE_BITMAP(hardware_bitmap, MTK_VDEC_HW_MAX);
 };
 
 static inline struct mtk_vcodec_ctx *fh_to_ctx(struct v4l2_fh *fh)
-- 
2.25.1