Re: [PATCH v4, 2/8] media: mediatek: vcodec: Enable venc dual core usage
From: AngeloGioacchino Del Regno
Date: Fri Jun 24 2022 - 05:01:13 EST
Il 24/06/22 10:23, Irui Wang ha scritto:
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")) {
You don't need this property here: just call of_platform_populate()
unconditionally. If there's no child node, this function will do nothing
so this conditional is useless and can be avoided.
+ ret = of_platform_populate(pdev->dev.of_node,
+ NULL, NULL, &pdev->dev);
+ if (ret) {
+ mtk_v4l2_err("Venc core device populate failed");
What about "Failed to populate children devices" ?
+ 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",
+ },
Please compress this in one line.
+ {},
Usually, we say that this is a sentinel.
{ .compatible = "mediatek,mtk-venc-hw" },
{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, mtk_venc_hw_ids);
+
..snip..
+
+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);
+
I'd do it like this, instead:
ret = of_property_read_u32(dev->of_node, "mediatek,hw-id", &sub_core->hw_id);
if (ret || sub_core->hw_id >= MTK_VENC_HW_MAX)
return dev_err_probe(dev, (ret ? ret : -EINVAL),
"Cannot parse hardware id");
P.S.: you're reading an unsigned value from devicetree, this cannot ever be less
than zero!
+ 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;
For consistency, this should be `enum mtk_venc_hw_id hw_id;`
+};
+
+#endif /* _MTK_VCODEC_ENC_HW_H_ */
Cheers,
Angelo