[PATCH v4, 2/8] media: mediatek: vcodec: Enable venc dual core usage

[Irui Wang]

Adds new property to indicate whether the encoder has multiple cores.
Use of_platform_populate to probe each venc cores, the core device can
use the init_clk/request_irq helper to initialize their own power/clk/irq.

Signed-off-by: Irui Wang <irui.wang@xxxxxxxxxxxx>
---
 .../media/platform/mediatek/vcodec/Makefile   |   4 +-
 .../platform/mediatek/vcodec/mtk_vcodec_drv.h |  12 ++
 .../mediatek/vcodec/mtk_vcodec_enc_drv.c      |  10 ++
 .../mediatek/vcodec/mtk_vcodec_enc_hw.c       | 139 ++++++++++++++++++
 .../mediatek/vcodec/mtk_vcodec_enc_hw.h       |  36 +++++
 5 files changed, 200 insertions(+), 1 deletion(-)
 create mode 100644 drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.c
 create mode 100644 drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.h

diff --git a/drivers/media/platform/mediatek/vcodec/Makefile b/drivers/media/platform/mediatek/vcodec/Makefile
index 93e7a343b5b0..ac068d88af29 100644
--- a/drivers/media/platform/mediatek/vcodec/Makefile
+++ b/drivers/media/platform/mediatek/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-hw.o
+				       mtk-vcodec-dec-hw.o \
+				       mtk_vcodec_enc_hw.o
 
 mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
 		vdec/vdec_vp8_if.o \
@@ -32,6 +33,7 @@ mtk-vcodec-enc-y := venc/venc_vp8_if.o \
 		venc_drv_if.o \
 		venc_vpu_if.o \
 
+mtk-vcodec-enc-hw-y := mtk_vcodec_enc_hw.o
 
 mtk-vcodec-common-y := mtk_vcodec_intr.o \
 		mtk_vcodec_util.o \
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
index dc6aada882d9..8919bdf2eef5 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_drv.h
@@ -97,6 +97,15 @@ enum mtk_fmt_type {
 	MTK_FMT_FRAME = 2,
 };
 
+/*
+ * enum mtk_venc_hw_id -- encoder hardware id
+ */
+enum mtk_venc_hw_id {
+	MTK_VENC_CORE_0 = 0,
+	MTK_VENC_CORE_1,
+	MTK_VENC_HW_MAX,
+};
+
 /*
  * enum mtk_vdec_hw_id - Hardware index used to separate
  *                         different hardware
@@ -484,6 +493,7 @@ struct mtk_vcodec_enc_pdata {
  * @dec_active_cnt: used to mark whether need to record register value
  * @vdec_racing_info: record register value
  * @dec_racing_info_mutex: mutex lock used for inner racing mode
+ * @enc_hw_dev: used to store venc core device
  */
 struct mtk_vcodec_dev {
 	struct v4l2_device v4l2_dev;
@@ -534,6 +544,8 @@ struct mtk_vcodec_dev {
 	u32 vdec_racing_info[132];
 	/* Protects access to vdec_racing_info data */
 	struct mutex dec_racing_info_mutex;
+
+	void *enc_hw_dev[MTK_VENC_HW_MAX];
 };
 
 static inline struct mtk_vcodec_ctx *fh_to_ctx(struct v4l2_fh *fh)
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c
index 95e8c29ccc65..65a8251a5a68 100644
--- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c
@@ -263,6 +263,16 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
 		goto err_enc_pm;
 	}
 
+	if (of_property_read_bool(pdev->dev.of_node,
+				  "mediatek,venc-multi-core")) {
+		ret = of_platform_populate(pdev->dev.of_node,
+					   NULL, NULL, &pdev->dev);
+		if (ret) {
+			mtk_v4l2_err("Venc core device populate failed");
+			goto err_enc_pm;
+		}
+	}
+
 	pm_runtime_enable(&pdev->dev);
 
 	dev->reg_base[dev->venc_pdata->core_id] =
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.c
new file mode 100644
index 000000000000..02582cce4863
--- /dev/null
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.c
@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+#include "mtk_vcodec_drv.h"
+#include "mtk_vcodec_enc.h"
+#include "mtk_vcodec_enc_hw.h"
+#include "mtk_vcodec_intr.h"
+
+static const struct of_device_id mtk_venc_hw_ids[] = {
+	{
+		.compatible = "mediatek,mtk-venc-hw",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, mtk_venc_hw_ids);
+
+static void clean_hw_irq_status(unsigned int irq_status, void __iomem *addr)
+{
+	if (irq_status & MTK_VENC_IRQ_STATUS_PAUSE)
+		writel(MTK_VENC_IRQ_STATUS_PAUSE, addr);
+
+	if (irq_status & MTK_VENC_IRQ_STATUS_SWITCH)
+		writel(MTK_VENC_IRQ_STATUS_SWITCH, addr);
+
+	if (irq_status & MTK_VENC_IRQ_STATUS_DRAM)
+		writel(MTK_VENC_IRQ_STATUS_DRAM, addr);
+
+	if (irq_status & MTK_VENC_IRQ_STATUS_SPS)
+		writel(MTK_VENC_IRQ_STATUS_SPS, addr);
+
+	if (irq_status & MTK_VENC_IRQ_STATUS_PPS)
+		writel(MTK_VENC_IRQ_STATUS_PPS, addr);
+
+	if (irq_status & MTK_VENC_IRQ_STATUS_FRM)
+		writel(MTK_VENC_IRQ_STATUS_FRM, addr);
+}
+
+static irqreturn_t mtk_enc_hw_irq_handler(int irq, void *priv)
+{
+	struct mtk_venc_hw_dev *dev = priv;
+	struct mtk_vcodec_ctx *ctx;
+	unsigned long flags;
+	void __iomem *addr;
+
+	spin_lock_irqsave(&dev->main_dev->irqlock, flags);
+	ctx = dev->curr_ctx;
+	spin_unlock_irqrestore(&dev->main_dev->irqlock, flags);
+	if (!ctx)
+		return IRQ_HANDLED;
+
+	mtk_v4l2_debug(1, "id=%d core :%d", ctx->id, dev->hw_id);
+
+	addr = dev->reg_base + MTK_VENC_IRQ_ACK_OFFSET;
+	ctx->irq_status = readl(dev->reg_base + MTK_VENC_IRQ_STATUS_OFFSET);
+	clean_hw_irq_status(ctx->irq_status, addr);
+
+	wake_up_ctx(ctx, MTK_INST_IRQ_RECEIVED, 0);
+	return IRQ_HANDLED;
+}
+
+static int mtk_venc_hw_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_venc_hw_dev *sub_core;
+	struct mtk_vcodec_dev *main_dev;
+	int ret;
+
+	if (!dev->parent)
+		return dev_err_probe(dev, -ENODEV,
+				     "No parent for venc core device\n");
+
+	main_dev = dev_get_drvdata(dev->parent);
+	if (!main_dev)
+		return dev_err_probe(dev, -EINVAL,
+				     "Failed to get parent driver data\n");
+
+	sub_core = devm_kzalloc(&pdev->dev, sizeof(*sub_core), GFP_KERNEL);
+	if (!sub_core)
+		return dev_err_probe(dev, -ENOMEM,
+				     "Failed to get alloc core data\n");
+
+	sub_core->plat_dev = pdev;
+
+	platform_set_drvdata(pdev, sub_core);
+
+	sub_core->reg_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(sub_core->reg_base))
+		return dev_err_probe(dev, PTR_ERR(sub_core->reg_base),
+				     "Failed to get reg base\n");
+
+	sub_core->enc_irq = platform_get_irq(pdev, 0);
+	if (sub_core->enc_irq < 0)
+		return dev_err_probe(dev, -EINVAL,
+				     "Failed to get irq resource\n");
+
+	ret = devm_request_irq(dev, sub_core->enc_irq,
+			       mtk_enc_hw_irq_handler, 0,
+			       pdev->name, sub_core);
+	if (ret)
+		return dev_err_probe(dev, -EINVAL,
+				     "Failed to install sub_core->enc_irq %d\n",
+				     sub_core->enc_irq);
+
+	of_property_read_u32(dev->of_node, "mediatek,hw-id",
+			     &sub_core->hw_id);
+
+	if (sub_core->hw_id < 0 || sub_core->hw_id >= MTK_VENC_HW_MAX)
+		return dev_err_probe(dev, -EINVAL,
+				     "Invalid hardware id %d\n",
+				     sub_core->hw_id);
+
+	main_dev->enc_hw_dev[sub_core->hw_id] = sub_core;
+	sub_core->main_dev = main_dev;
+
+	dev_dbg(dev, "Venc core :%d probe done\n", sub_core->hw_id);
+
+	return 0;
+}
+
+static struct platform_driver mtk_venc_core_driver = {
+	.probe  = mtk_venc_hw_probe,
+	.driver = {
+		.name	 = "mtk-venc-core",
+		.of_match_table = mtk_venc_hw_ids,
+	},
+};
+module_platform_driver(mtk_venc_core_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MediaTek video encoder core driver");
diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.h b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.h
new file mode 100644
index 000000000000..0ff544c20eb9
--- /dev/null
+++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_hw.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ */
+
+#ifndef _MTK_VCODEC_ENC_HW_H_
+#define _MTK_VCODEC_ENC_HW_H_
+
+#include <linux/platform_device.h>
+#include "mtk_vcodec_drv.h"
+
+/**
+ * struct mtk_venc_hw_dev - driver data
+ * @plat_dev: platform_device
+ * @main_dev: main device
+ * @pm: power management data
+ * @curr_ctx: the context that is waiting for venc hardware
+ * @reg_base: mapped address of venc registers
+ * @irq_status: venc hardware irq status
+ * @enc_irq: venc device irq
+ * @hw_id: for venc hardware id: core#0, core#1...
+ */
+struct mtk_venc_hw_dev {
+	struct platform_device *plat_dev;
+	struct mtk_vcodec_dev *main_dev;
+
+	struct mtk_vcodec_pm pm;
+	struct mtk_vcodec_ctx *curr_ctx;
+
+	void __iomem *reg_base;
+	unsigned int irq_status;
+	int enc_irq;
+	int hw_id;
+};
+
+#endif /* _MTK_VCODEC_ENC_HW_H_ */
-- 
2.18.0