[PATCH v2 1/3] dt-bindings: Document JZ47xx VPU auxiliary processor

[PATCH v2 1/3] dt-bindings: Document JZ47xx VPU auxiliary processor

[Paul Cercueil]

Inside the Video Processing Unit (VPU) of the recent JZ47xx SoCs from
Ingenic is a second Xburst MIPS CPU very similar to the main core.
This document describes the devicetree bindings for this auxiliary
processor.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---

Notes:
    v2: Update TCSM0 address in example

 .../bindings/remoteproc/ingenic,vpu.txt       | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt

diff --git a/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt b/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
new file mode 100644
index 000000000000..576f9e582780
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
@@ -0,0 +1,36 @@
+* Ingenic JZ47xx auxiliary processor
+
+Inside the Video Processing Unit (VPU) of the recent JZ47xx SoCs from Ingenic
+is a second Xburst MIPS CPU very similar to the main core.
+This document describes the devicetree bindings for this auxiliary processor.
+
+Required properties:
+- compatible: Should be "ingenic,jz4770-vpu-rproc"
+- reg: Must contain the registers location and length for:
+  * the auxiliary processor,
+  * the Tightly Coupled Shared Memory 0 (TCSM0),
+  * the Tightly Coupled Shared Memory 1 (TCSM1),
+  * the shared SRAM.
+- reg-names: Must contain "aux", "tcsm0", "tcsm1", "sram".
+- clocks: Clock specifier for the AUX and VPU clocks.
+- clock-names: Must contain "aux", "vpu".
+- interrupts: Interrupt specifier for the VPU hardware block.
+
+Example:
+
+vpu: cpu@132a0000 {
+	compatible = "ingenic,jz4770-vpu-rproc";
+
+	reg = <0x132a0000 0x20 /* AUX */
+		   0x132b0000 0x4000 /* TCSM0 */
+		   0x132c0000 0xc000 /* TCSM1 */
+		   0x132f0000 0x7000 /* SRAM */
+	>;
+	reg-names = "aux", "tcsm0", "tcsm1", "sram";
+
+	clocks = <&cgu JZ4770_CLK_AUX>, <&cgu JZ4770_CLK_VPU>;
+	clock-names = "aux", "vpu";
+
+	interrupt-parent = <&cpuintc>;
+	interrupts = <3>;
+};
-- 
2.21.0.593.g511ec345e18

[PATCH v2 2/3] remoteproc: Add prepare/unprepare callbacks

[Paul Cercueil]

The .prepare() callback is called before the firmware is loaded to
memory. This is useful for instance in the case where some setup is
required for the memory to be accessible.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---

Notes:
    v2: No change

 drivers/remoteproc/remoteproc_core.c | 16 +++++++++++++++-
 include/linux/remoteproc.h           |  4 ++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 3c5fbbbfb0f1..68faad3ef0c1 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1300,11 +1300,19 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
 	struct device *dev = &rproc->dev;
 	int ret;
 
+	if (rproc->ops->prepare) {
+		ret = rproc->ops->prepare(rproc);
+		if (ret) {
+			dev_err(dev, "Failed to prepare rproc: %d\n", ret);
+			return ret;
+		}
+	}
+
 	/* load the ELF segments to memory */
 	ret = rproc_load_segments(rproc, fw);
 	if (ret) {
 		dev_err(dev, "Failed to load program segments: %d\n", ret);
-		return ret;
+		goto unprepare_rproc;
 	}
 
 	/*
@@ -1355,6 +1363,9 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
 	rproc_unprepare_subdevices(rproc);
 reset_table_ptr:
 	rproc->table_ptr = rproc->cached_table;
+unprepare_rproc:
+	if (rproc->ops->unprepare)
+		rproc->ops->unprepare(rproc);
 
 	return ret;
 }
@@ -1484,6 +1495,9 @@ static int rproc_stop(struct rproc *rproc, bool crashed)
 
 	rproc->state = RPROC_OFFLINE;
 
+	if (rproc->ops->unprepare)
+		rproc->ops->unprepare(rproc);
+
 	dev_info(dev, "stopped remote processor %s\n", rproc->name);
 
 	return 0;
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 16ad66683ad0..be65c2a92c58 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -355,6 +355,8 @@ enum rsc_handling_status {
 
 /**
  * struct rproc_ops - platform-specific device handlers
+ * @prepare:	prepare the device for power up (before the firmware is loaded)
+ * @unprepare:	unprepare the device after it is stopped
  * @start:	power on the device and boot it
  * @stop:	power off the device
  * @kick:	kick a virtqueue (virtqueue id given as a parameter)
@@ -371,6 +373,8 @@ enum rsc_handling_status {
  * @get_boot_addr:	get boot address to entry point specified in firmware
  */
 struct rproc_ops {
+	int (*prepare)(struct rproc *rproc);
+	void (*unprepare)(struct rproc *rproc);
 	int (*start)(struct rproc *rproc);
 	int (*stop)(struct rproc *rproc);
 	void (*kick)(struct rproc *rproc, int vqid);
-- 
2.21.0.593.g511ec345e18

[PATCH v2 3/3] remoteproc: ingenic: Added remoteproc driver

[Paul Cercueil]

This driver is used to boot, communicate with and load firmwares to the
MIPS co-processor found in the VPU hardware of the JZ47xx SoCs from
Ingenic.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---

Notes:
    v2: Remove exception for always-mapped memories

 drivers/remoteproc/Kconfig         |   8 +
 drivers/remoteproc/Makefile        |   1 +
 drivers/remoteproc/ingenic_rproc.c | 285 +++++++++++++++++++++++++++++
 3 files changed, 294 insertions(+)
 create mode 100644 drivers/remoteproc/ingenic_rproc.c

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 28ed306982f7..a0be40e2098d 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -214,6 +214,14 @@ config STM32_RPROC
 
 	  This can be either built-in or a loadable module.
 
+config INGENIC_RPROC
+	tristate "Ingenic JZ47xx VPU remoteproc support"
+	depends on MIPS || COMPILE_TEST
+	help
+	  Say y or m here to support the VPU in the JZ47xx SoCs from Ingenic.
+	  This can be either built-in or a loadable module.
+	  If unsure say N.
+
 endif # REMOTEPROC
 
 endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 00f09e658cb3..6eb0137abbc7 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -10,6 +10,7 @@ remoteproc-y				+= remoteproc_sysfs.o
 remoteproc-y				+= remoteproc_virtio.o
 remoteproc-y				+= remoteproc_elf_loader.o
 obj-$(CONFIG_IMX_REMOTEPROC)		+= imx_rproc.o
+obj-$(CONFIG_INGENIC_RPROC)			+= ingenic_rproc.o
 obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o
 obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
 obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
diff --git a/drivers/remoteproc/ingenic_rproc.c b/drivers/remoteproc/ingenic_rproc.c
new file mode 100644
index 000000000000..6fe0530c83a6
--- /dev/null
+++ b/drivers/remoteproc/ingenic_rproc.c
@@ -0,0 +1,285 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Ingenic JZ47xx remoteproc driver
+ * Copyright 2019, Paul Cercueil <paul@crapouillou.net>
+ */
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#include "remoteproc_internal.h"
+
+#define REG_AUX_CTRL		0x0
+#define REG_AUX_MSG_ACK		0x10
+#define REG_AUX_MSG		0x14
+#define REG_CORE_MSG_ACK	0x18
+#define REG_CORE_MSG		0x1C
+
+#define AUX_CTRL_SLEEP		BIT(31)
+#define AUX_CTRL_MSG_IRQ_EN	BIT(3)
+#define AUX_CTRL_NMI_RESETS	BIT(2)
+#define AUX_CTRL_NMI		BIT(1)
+#define AUX_CTRL_SW_RESET	BIT(0)
+
+struct vpu_mem_map {
+	const char *name;
+	unsigned int da;
+};
+
+struct vpu_mem_info {
+	const struct vpu_mem_map *map;
+	unsigned long len;
+	void __iomem *base;
+};
+
+static const struct vpu_mem_map vpu_mem_map[] = {
+	{ "tcsm0", 0x132b0000 },
+	{ "tcsm1", 0xf4000000 },
+	{ "sram",  0x132f0000 },
+};
+
+/* Device data */
+struct vpu {
+	int irq;
+	struct clk *vpu_clk;
+	struct clk *aux_clk;
+	void __iomem *aux_base;
+	struct vpu_mem_info mem_info[ARRAY_SIZE(vpu_mem_map)];
+	struct device *dev;
+};
+
+static int ingenic_rproc_prepare(struct rproc *rproc)
+{
+	struct vpu *vpu = rproc->priv;
+	int ret;
+
+	ret = clk_prepare_enable(vpu->vpu_clk);
+	if (ret) {
+		dev_err(vpu->dev, "Unable to start VPU clock: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(vpu->aux_clk);
+	if (ret) {
+		dev_err(vpu->dev, "Unable to start AUX clock: %d\n", ret);
+		goto err_disable_vpu_clk;
+	}
+
+	return 0;
+
+err_disable_vpu_clk:
+	clk_disable_unprepare(vpu->vpu_clk);
+	return ret;
+}
+
+static void ingenic_rproc_unprepare(struct rproc *rproc)
+{
+	struct vpu *vpu = rproc->priv;
+
+	clk_disable_unprepare(vpu->aux_clk);
+	clk_disable_unprepare(vpu->vpu_clk);
+}
+
+static int ingenic_rproc_start(struct rproc *rproc)
+{
+	struct vpu *vpu = rproc->priv;
+	u32 ctrl;
+
+	enable_irq(vpu->irq);
+
+	/* Reset the AUX and enable message IRQ */
+	ctrl = AUX_CTRL_NMI_RESETS | AUX_CTRL_NMI | AUX_CTRL_MSG_IRQ_EN;
+	writel(ctrl, vpu->aux_base + REG_AUX_CTRL);
+
+	return 0;
+}
+
+static int ingenic_rproc_stop(struct rproc *rproc)
+{
+	struct vpu *vpu = rproc->priv;
+
+	/* Keep AUX in reset mode */
+	writel(AUX_CTRL_SW_RESET, vpu->aux_base + REG_AUX_CTRL);
+
+	disable_irq_nosync(vpu->irq);
+
+	return 0;
+}
+
+static void ingenic_rproc_kick(struct rproc *rproc, int vqid)
+{
+	struct vpu *vpu = rproc->priv;
+
+	writel(vqid, vpu->aux_base + REG_CORE_MSG);
+}
+
+static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct vpu *vpu = rproc->priv;
+	void __iomem *va = NULL;
+	unsigned int i;
+
+	if (len <= 0)
+		return NULL;
+
+	for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
+		const struct vpu_mem_info *info = &vpu->mem_info[i];
+		const struct vpu_mem_map *map = info->map;
+
+		if (da >= map->da && (da + len) < (map->da + info->len)) {
+			va = info->base + (da - map->da);
+			break;
+		}
+	}
+
+	return (__force void *)va;
+}
+
+static struct rproc_ops ingenic_rproc_ops = {
+	.prepare = ingenic_rproc_prepare,
+	.unprepare = ingenic_rproc_unprepare,
+	.start = ingenic_rproc_start,
+	.stop = ingenic_rproc_stop,
+	.kick = ingenic_rproc_kick,
+	.da_to_va = ingenic_rproc_da_to_va,
+};
+
+static irqreturn_t vpu_interrupt(int irq, void *data)
+{
+	struct rproc *rproc = data;
+	struct vpu *vpu = rproc->priv;
+	u32 vring;
+
+	vring = readl(vpu->aux_base + REG_AUX_MSG);
+
+	/* Ack the interrupt */
+	writel(0, vpu->aux_base + REG_AUX_MSG_ACK);
+
+	return rproc_vq_interrupt(rproc, vring);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id ingenic_rproc_of_matches[] = {
+	{ .compatible = "ingenic,jz4770-vpu-rproc", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
+#endif
+
+static void ingenic_rproc_free(void *rproc)
+{
+	rproc_free(rproc);
+}
+
+static void ingenic_rproc_unregister(void *rproc)
+{
+	rproc_del(rproc);
+	rproc_shutdown(rproc);
+}
+
+static int ingenic_rproc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *mem;
+	struct rproc *rproc;
+	struct vpu *vpu;
+	unsigned int i;
+	int ret;
+
+	rproc = rproc_alloc(dev, "ingenic-vpu",
+			    &ingenic_rproc_ops, NULL, sizeof(*vpu));
+	if (!rproc)
+		return -ENOMEM;
+
+	ret = devm_add_action_or_reset(dev, ingenic_rproc_free, rproc);
+	if (ret) {
+		dev_err(dev, "Unable to add action");
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, rproc);
+	vpu = rproc->priv;
+	vpu->dev = &pdev->dev;
+
+	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aux");
+	vpu->aux_base = devm_ioremap_resource(dev, mem);
+	if (IS_ERR(vpu->aux_base)) {
+		dev_err(dev, "Failed to ioremap");
+		return PTR_ERR(vpu->aux_base);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
+		mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   vpu_mem_map[i].name);
+
+		vpu->mem_info[i].base = devm_ioremap_resource(dev, mem);
+		if (IS_ERR(vpu->mem_info[i].base)) {
+			ret = PTR_ERR(vpu->mem_info[i].base);
+			dev_err(dev, "Failed to ioremap");
+			return ret;
+		}
+
+		vpu->mem_info[i].len = resource_size(mem);
+		vpu->mem_info[i].map = &vpu_mem_map[i];
+	}
+
+	vpu->vpu_clk = devm_clk_get(dev, "vpu");
+	if (IS_ERR(vpu->vpu_clk)) {
+		dev_err(dev, "Failed to get VPU clock");
+		return PTR_ERR(vpu->vpu_clk);
+	}
+
+	vpu->aux_clk = devm_clk_get(dev, "aux");
+	if (IS_ERR(vpu->aux_clk)) {
+		dev_err(dev, "Failed to get AUX clock");
+		return PTR_ERR(vpu->aux_clk);
+	}
+
+	vpu->irq = platform_get_irq(pdev, 0);
+	if (vpu->irq < 0) {
+		dev_err(dev, "Failed to get platform IRQ");
+		return vpu->irq;
+	}
+
+	ret = devm_request_irq(dev, vpu->irq, vpu_interrupt, 0, "VPU", rproc);
+	if (ret < 0) {
+		dev_err(dev, "Failed to request IRQ");
+		return ret;
+	}
+
+	disable_irq_nosync(vpu->irq);
+
+	ret = rproc_add(rproc);
+	if (ret) {
+		dev_err(dev, "Failed to register remote processor");
+		return ret;
+	}
+
+	ret = devm_add_action_or_reset(dev, ingenic_rproc_unregister, rproc);
+	if (ret) {
+		dev_err(dev, "Unable to add action");
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct platform_driver ingenic_rproc_driver = {
+	.probe = ingenic_rproc_probe,
+	.driver = {
+		.name = "ingenic-vpu",
+		.owner = THIS_MODULE,
+		.of_match_table = of_match_ptr(ingenic_rproc_of_matches),
+	},
+};
+module_platform_driver(ingenic_rproc_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
+MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");
-- 
2.21.0.593.g511ec345e18

Re: [PATCH v2 3/3] remoteproc: ingenic: Added remoteproc driver

[Bjorn Andersson]

On Mon 29 Jul 11:31 PDT 2019, Paul Cercueil wrote:

> This driver is used to boot, communicate with and load firmwares to the
> MIPS co-processor found in the VPU hardware of the JZ47xx SoCs from
> Ingenic.
> 
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> ---
> 
> Notes:
>     v2: Remove exception for always-mapped memories
> 
>  drivers/remoteproc/Kconfig         |   8 +
>  drivers/remoteproc/Makefile        |   1 +
>  drivers/remoteproc/ingenic_rproc.c | 285 +++++++++++++++++++++++++++++
>  3 files changed, 294 insertions(+)
>  create mode 100644 drivers/remoteproc/ingenic_rproc.c
> 
> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
> index 28ed306982f7..a0be40e2098d 100644
> --- a/drivers/remoteproc/Kconfig
> +++ b/drivers/remoteproc/Kconfig
> @@ -214,6 +214,14 @@ config STM32_RPROC
>  
>  	  This can be either built-in or a loadable module.
>  
> +config INGENIC_RPROC
> +	tristate "Ingenic JZ47xx VPU remoteproc support"
> +	depends on MIPS || COMPILE_TEST
> +	help
> +	  Say y or m here to support the VPU in the JZ47xx SoCs from Ingenic.
> +	  This can be either built-in or a loadable module.
> +	  If unsure say N.
> +
>  endif # REMOTEPROC
>  
>  endmenu
> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
> index 00f09e658cb3..6eb0137abbc7 100644
> --- a/drivers/remoteproc/Makefile
> +++ b/drivers/remoteproc/Makefile
> @@ -10,6 +10,7 @@ remoteproc-y				+= remoteproc_sysfs.o
>  remoteproc-y				+= remoteproc_virtio.o
>  remoteproc-y				+= remoteproc_elf_loader.o
>  obj-$(CONFIG_IMX_REMOTEPROC)		+= imx_rproc.o
> +obj-$(CONFIG_INGENIC_RPROC)			+= ingenic_rproc.o
>  obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o
>  obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
>  obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
> diff --git a/drivers/remoteproc/ingenic_rproc.c b/drivers/remoteproc/ingenic_rproc.c
> new file mode 100644
> index 000000000000..6fe0530c83a6
> --- /dev/null
> +++ b/drivers/remoteproc/ingenic_rproc.c
> @@ -0,0 +1,285 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Ingenic JZ47xx remoteproc driver
> + * Copyright 2019, Paul Cercueil <paul@crapouillou.net>
> + */
> +
> +#include <linux/bitops.h>
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/remoteproc.h>
> +
> +#include "remoteproc_internal.h"
> +
> +#define REG_AUX_CTRL		0x0
> +#define REG_AUX_MSG_ACK		0x10
> +#define REG_AUX_MSG		0x14
> +#define REG_CORE_MSG_ACK	0x18
> +#define REG_CORE_MSG		0x1C
> +
> +#define AUX_CTRL_SLEEP		BIT(31)
> +#define AUX_CTRL_MSG_IRQ_EN	BIT(3)
> +#define AUX_CTRL_NMI_RESETS	BIT(2)
> +#define AUX_CTRL_NMI		BIT(1)
> +#define AUX_CTRL_SW_RESET	BIT(0)
> +
> +struct vpu_mem_map {
> +	const char *name;
> +	unsigned int da;
> +};
> +
> +struct vpu_mem_info {
> +	const struct vpu_mem_map *map;
> +	unsigned long len;
> +	void __iomem *base;
> +};
> +
> +static const struct vpu_mem_map vpu_mem_map[] = {
> +	{ "tcsm0", 0x132b0000 },
> +	{ "tcsm1", 0xf4000000 },
> +	{ "sram",  0x132f0000 },
> +};
> +
> +/* Device data */
> +struct vpu {
> +	int irq;
> +	struct clk *vpu_clk;
> +	struct clk *aux_clk;
> +	void __iomem *aux_base;
> +	struct vpu_mem_info mem_info[ARRAY_SIZE(vpu_mem_map)];
> +	struct device *dev;
> +};
> +
> +static int ingenic_rproc_prepare(struct rproc *rproc)

So I presume aux_clk and vpu_clk are required by the load callback?

> +{
> +	struct vpu *vpu = rproc->priv;
> +	int ret;
> +
> +	ret = clk_prepare_enable(vpu->vpu_clk);

Please use the clk_bulk API instead.

> +	if (ret) {
> +		dev_err(vpu->dev, "Unable to start VPU clock: %d\n", ret);
> +		return ret;
> +	}
> +
> +	ret = clk_prepare_enable(vpu->aux_clk);
> +	if (ret) {
> +		dev_err(vpu->dev, "Unable to start AUX clock: %d\n", ret);
> +		goto err_disable_vpu_clk;
> +	}
> +
> +	return 0;
> +
> +err_disable_vpu_clk:
> +	clk_disable_unprepare(vpu->vpu_clk);
> +	return ret;
> +}
> +
> +static void ingenic_rproc_unprepare(struct rproc *rproc)
> +{
> +	struct vpu *vpu = rproc->priv;
> +
> +	clk_disable_unprepare(vpu->aux_clk);
> +	clk_disable_unprepare(vpu->vpu_clk);
> +}
> +
> +static int ingenic_rproc_start(struct rproc *rproc)
> +{
> +	struct vpu *vpu = rproc->priv;
> +	u32 ctrl;
> +
> +	enable_irq(vpu->irq);
> +
> +	/* Reset the AUX and enable message IRQ */
> +	ctrl = AUX_CTRL_NMI_RESETS | AUX_CTRL_NMI | AUX_CTRL_MSG_IRQ_EN;
> +	writel(ctrl, vpu->aux_base + REG_AUX_CTRL);
> +
> +	return 0;
> +}
> +
> +static int ingenic_rproc_stop(struct rproc *rproc)
> +{
> +	struct vpu *vpu = rproc->priv;
> +
> +	/* Keep AUX in reset mode */
> +	writel(AUX_CTRL_SW_RESET, vpu->aux_base + REG_AUX_CTRL);
> +
> +	disable_irq_nosync(vpu->irq);

The _nosync here mean that we might return to rproc_stop(), which will
call ingenic_rproc_unprepare(). Is there any relationship between your
clocks and the memory used by virtio?

> +
> +	return 0;
> +}
> +
> +static void ingenic_rproc_kick(struct rproc *rproc, int vqid)
> +{
> +	struct vpu *vpu = rproc->priv;
> +
> +	writel(vqid, vpu->aux_base + REG_CORE_MSG);
> +}
> +
> +static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
> +{
> +	struct vpu *vpu = rproc->priv;
> +	void __iomem *va = NULL;
> +	unsigned int i;
> +
> +	if (len <= 0)
> +		return NULL;
> +
> +	for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
> +		const struct vpu_mem_info *info = &vpu->mem_info[i];
> +		const struct vpu_mem_map *map = info->map;
> +
> +		if (da >= map->da && (da + len) < (map->da + info->len)) {
> +			va = info->base + (da - map->da);
> +			break;
> +		}
> +	}
> +
> +	return (__force void *)va;
> +}
> +
> +static struct rproc_ops ingenic_rproc_ops = {
> +	.prepare = ingenic_rproc_prepare,
> +	.unprepare = ingenic_rproc_unprepare,
> +	.start = ingenic_rproc_start,
> +	.stop = ingenic_rproc_stop,
> +	.kick = ingenic_rproc_kick,
> +	.da_to_va = ingenic_rproc_da_to_va,
> +};
> +
> +static irqreturn_t vpu_interrupt(int irq, void *data)
> +{
> +	struct rproc *rproc = data;
> +	struct vpu *vpu = rproc->priv;
> +	u32 vring;
> +
> +	vring = readl(vpu->aux_base + REG_AUX_MSG);
> +
> +	/* Ack the interrupt */
> +	writel(0, vpu->aux_base + REG_AUX_MSG_ACK);
> +
> +	return rproc_vq_interrupt(rproc, vring);
> +}
> +
> +#ifdef CONFIG_OF

You don't need #ifdef here.

> +static const struct of_device_id ingenic_rproc_of_matches[] = {

Please move this down just before the ingenic_rproc_driver.

> +	{ .compatible = "ingenic,jz4770-vpu-rproc", },
> +	{}
> +};
> +MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
> +#endif
> +
> +static void ingenic_rproc_free(void *rproc)
> +{
> +	rproc_free(rproc);
> +}
> +
> +static void ingenic_rproc_unregister(void *rproc)
> +{
> +	rproc_del(rproc);
> +	rproc_shutdown(rproc);
> +}
> +
> +static int ingenic_rproc_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct resource *mem;
> +	struct rproc *rproc;
> +	struct vpu *vpu;
> +	unsigned int i;
> +	int ret;
> +
> +	rproc = rproc_alloc(dev, "ingenic-vpu",
> +			    &ingenic_rproc_ops, NULL, sizeof(*vpu));
> +	if (!rproc)
> +		return -ENOMEM;
> +
> +	ret = devm_add_action_or_reset(dev, ingenic_rproc_free, rproc);

Please write a patch adding devm_rproc_alloc() to the core.

> +	if (ret) {
> +		dev_err(dev, "Unable to add action");
> +		return ret;
> +	}
> +
> +	platform_set_drvdata(pdev, rproc);

I don't see you getting the drvdata, so please skip this.

> +	vpu = rproc->priv;
> +	vpu->dev = &pdev->dev;
> +
> +	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aux");
> +	vpu->aux_base = devm_ioremap_resource(dev, mem);
> +	if (IS_ERR(vpu->aux_base)) {
> +		dev_err(dev, "Failed to ioremap");
> +		return PTR_ERR(vpu->aux_base);
> +	}
> +
> +	for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
> +		mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> +						   vpu_mem_map[i].name);
> +
> +		vpu->mem_info[i].base = devm_ioremap_resource(dev, mem);
> +		if (IS_ERR(vpu->mem_info[i].base)) {
> +			ret = PTR_ERR(vpu->mem_info[i].base);
> +			dev_err(dev, "Failed to ioremap");
> +			return ret;
> +		}
> +
> +		vpu->mem_info[i].len = resource_size(mem);
> +		vpu->mem_info[i].map = &vpu_mem_map[i];
> +	}
> +
> +	vpu->vpu_clk = devm_clk_get(dev, "vpu");
> +	if (IS_ERR(vpu->vpu_clk)) {
> +		dev_err(dev, "Failed to get VPU clock");
> +		return PTR_ERR(vpu->vpu_clk);
> +	}
> +
> +	vpu->aux_clk = devm_clk_get(dev, "aux");
> +	if (IS_ERR(vpu->aux_clk)) {
> +		dev_err(dev, "Failed to get AUX clock");
> +		return PTR_ERR(vpu->aux_clk);
> +	}
> +
> +	vpu->irq = platform_get_irq(pdev, 0);
> +	if (vpu->irq < 0) {
> +		dev_err(dev, "Failed to get platform IRQ");
> +		return vpu->irq;
> +	}
> +
> +	ret = devm_request_irq(dev, vpu->irq, vpu_interrupt, 0, "VPU", rproc);
> +	if (ret < 0) {
> +		dev_err(dev, "Failed to request IRQ");
> +		return ret;
> +	}
> +
> +	disable_irq_nosync(vpu->irq);
> +
> +	ret = rproc_add(rproc);
> +	if (ret) {
> +		dev_err(dev, "Failed to register remote processor");
> +		return ret;
> +	}
> +
> +	ret = devm_add_action_or_reset(dev, ingenic_rproc_unregister, rproc);

Please add a devm_rproc_add() to the core.

> +	if (ret) {
> +		dev_err(dev, "Unable to add action");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static struct platform_driver ingenic_rproc_driver = {
> +	.probe = ingenic_rproc_probe,
> +	.driver = {
> +		.name = "ingenic-vpu",
> +		.owner = THIS_MODULE,

module_platform_driver() will assign .module for you.

Regards,
Bjorn

> +		.of_match_table = of_match_ptr(ingenic_rproc_of_matches),
> +	},
> +};
> +module_platform_driver(ingenic_rproc_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
> +MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");
> -- 
> 2.21.0.593.g511ec345e18
> 

Re: [PATCH v2 3/3] remoteproc: ingenic: Added remoteproc driver

[Paul Cercueil]

Hi Bjorn,

On 2019-08-27 00:25, Bjorn Andersson wrote:
> On Mon 29 Jul 11:31 PDT 2019, Paul Cercueil wrote:
> 
>> This driver is used to boot, communicate with and load firmwares to 
>> the
>> MIPS co-processor found in the VPU hardware of the JZ47xx SoCs from
>> Ingenic.
>> 
>> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
>> ---
>> 
>> Notes:
>>     v2: Remove exception for always-mapped memories
>> 
>>  drivers/remoteproc/Kconfig         |   8 +
>>  drivers/remoteproc/Makefile        |   1 +
>>  drivers/remoteproc/ingenic_rproc.c | 285 
>> +++++++++++++++++++++++++++++
>>  3 files changed, 294 insertions(+)
>>  create mode 100644 drivers/remoteproc/ingenic_rproc.c
>> 
>> diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
>> index 28ed306982f7..a0be40e2098d 100644
>> --- a/drivers/remoteproc/Kconfig
>> +++ b/drivers/remoteproc/Kconfig
>> @@ -214,6 +214,14 @@ config STM32_RPROC
>> 
>>  	  This can be either built-in or a loadable module.
>> 
>> +config INGENIC_RPROC
>> +	tristate "Ingenic JZ47xx VPU remoteproc support"
>> +	depends on MIPS || COMPILE_TEST
>> +	help
>> +	  Say y or m here to support the VPU in the JZ47xx SoCs from 
>> Ingenic.
>> +	  This can be either built-in or a loadable module.
>> +	  If unsure say N.
>> +
>>  endif # REMOTEPROC
>> 
>>  endmenu
>> diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
>> index 00f09e658cb3..6eb0137abbc7 100644
>> --- a/drivers/remoteproc/Makefile
>> +++ b/drivers/remoteproc/Makefile
>> @@ -10,6 +10,7 @@ remoteproc-y				+= remoteproc_sysfs.o
>>  remoteproc-y				+= remoteproc_virtio.o
>>  remoteproc-y				+= remoteproc_elf_loader.o
>>  obj-$(CONFIG_IMX_REMOTEPROC)		+= imx_rproc.o
>> +obj-$(CONFIG_INGENIC_RPROC)			+= ingenic_rproc.o
>>  obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o
>>  obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
>>  obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
>> diff --git a/drivers/remoteproc/ingenic_rproc.c 
>> b/drivers/remoteproc/ingenic_rproc.c
>> new file mode 100644
>> index 000000000000..6fe0530c83a6
>> --- /dev/null
>> +++ b/drivers/remoteproc/ingenic_rproc.c
>> @@ -0,0 +1,285 @@
>> +// SPDX-License-Identifier: GPL-2.0+
>> +/*
>> + * Ingenic JZ47xx remoteproc driver
>> + * Copyright 2019, Paul Cercueil <paul@crapouillou.net>
>> + */
>> +
>> +#include <linux/bitops.h>
>> +#include <linux/clk.h>
>> +#include <linux/err.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/io.h>
>> +#include <linux/module.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/remoteproc.h>
>> +
>> +#include "remoteproc_internal.h"
>> +
>> +#define REG_AUX_CTRL		0x0
>> +#define REG_AUX_MSG_ACK		0x10
>> +#define REG_AUX_MSG		0x14
>> +#define REG_CORE_MSG_ACK	0x18
>> +#define REG_CORE_MSG		0x1C
>> +
>> +#define AUX_CTRL_SLEEP		BIT(31)
>> +#define AUX_CTRL_MSG_IRQ_EN	BIT(3)
>> +#define AUX_CTRL_NMI_RESETS	BIT(2)
>> +#define AUX_CTRL_NMI		BIT(1)
>> +#define AUX_CTRL_SW_RESET	BIT(0)
>> +
>> +struct vpu_mem_map {
>> +	const char *name;
>> +	unsigned int da;
>> +};
>> +
>> +struct vpu_mem_info {
>> +	const struct vpu_mem_map *map;
>> +	unsigned long len;
>> +	void __iomem *base;
>> +};
>> +
>> +static const struct vpu_mem_map vpu_mem_map[] = {
>> +	{ "tcsm0", 0x132b0000 },
>> +	{ "tcsm1", 0xf4000000 },
>> +	{ "sram",  0x132f0000 },
>> +};
>> +
>> +/* Device data */
>> +struct vpu {
>> +	int irq;
>> +	struct clk *vpu_clk;
>> +	struct clk *aux_clk;
>> +	void __iomem *aux_base;
>> +	struct vpu_mem_info mem_info[ARRAY_SIZE(vpu_mem_map)];
>> +	struct device *dev;
>> +};
>> +
>> +static int ingenic_rproc_prepare(struct rproc *rproc)
> 
> So I presume aux_clk and vpu_clk are required by the load callback?

Sorry, I really thought I answered that email.

The clocks are required to be enabled for the firmware to be loaded to 
one of the available memories, that's the reason behind patch [2/3].

>> +{
>> +	struct vpu *vpu = rproc->priv;
>> +	int ret;
>> +
>> +	ret = clk_prepare_enable(vpu->vpu_clk);
> 
> Please use the clk_bulk API instead.

Will do.

>> +	if (ret) {
>> +		dev_err(vpu->dev, "Unable to start VPU clock: %d\n", ret);
>> +		return ret;
>> +	}
>> +
>> +	ret = clk_prepare_enable(vpu->aux_clk);
>> +	if (ret) {
>> +		dev_err(vpu->dev, "Unable to start AUX clock: %d\n", ret);
>> +		goto err_disable_vpu_clk;
>> +	}
>> +
>> +	return 0;
>> +
>> +err_disable_vpu_clk:
>> +	clk_disable_unprepare(vpu->vpu_clk);
>> +	return ret;
>> +}
>> +
>> +static void ingenic_rproc_unprepare(struct rproc *rproc)
>> +{
>> +	struct vpu *vpu = rproc->priv;
>> +
>> +	clk_disable_unprepare(vpu->aux_clk);
>> +	clk_disable_unprepare(vpu->vpu_clk);
>> +}
>> +
>> +static int ingenic_rproc_start(struct rproc *rproc)
>> +{
>> +	struct vpu *vpu = rproc->priv;
>> +	u32 ctrl;
>> +
>> +	enable_irq(vpu->irq);
>> +
>> +	/* Reset the AUX and enable message IRQ */
>> +	ctrl = AUX_CTRL_NMI_RESETS | AUX_CTRL_NMI | AUX_CTRL_MSG_IRQ_EN;
>> +	writel(ctrl, vpu->aux_base + REG_AUX_CTRL);
>> +
>> +	return 0;
>> +}
>> +
>> +static int ingenic_rproc_stop(struct rproc *rproc)
>> +{
>> +	struct vpu *vpu = rproc->priv;
>> +
>> +	/* Keep AUX in reset mode */
>> +	writel(AUX_CTRL_SW_RESET, vpu->aux_base + REG_AUX_CTRL);
>> +
>> +	disable_irq_nosync(vpu->irq);
> 
> The _nosync here mean that we might return to rproc_stop(), which will
> call ingenic_rproc_unprepare(). Is there any relationship between your
> clocks and the memory used by virtio?

Yes, the memory is only accessible when the clocks are enabled, the 
system locks up otherwise.

>> +
>> +	return 0;
>> +}
>> +
>> +static void ingenic_rproc_kick(struct rproc *rproc, int vqid)
>> +{
>> +	struct vpu *vpu = rproc->priv;
>> +
>> +	writel(vqid, vpu->aux_base + REG_CORE_MSG);
>> +}
>> +
>> +static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, int 
>> len)
>> +{
>> +	struct vpu *vpu = rproc->priv;
>> +	void __iomem *va = NULL;
>> +	unsigned int i;
>> +
>> +	if (len <= 0)
>> +		return NULL;
>> +
>> +	for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
>> +		const struct vpu_mem_info *info = &vpu->mem_info[i];
>> +		const struct vpu_mem_map *map = info->map;
>> +
>> +		if (da >= map->da && (da + len) < (map->da + info->len)) {
>> +			va = info->base + (da - map->da);
>> +			break;
>> +		}
>> +	}
>> +
>> +	return (__force void *)va;
>> +}
>> +
>> +static struct rproc_ops ingenic_rproc_ops = {
>> +	.prepare = ingenic_rproc_prepare,
>> +	.unprepare = ingenic_rproc_unprepare,
>> +	.start = ingenic_rproc_start,
>> +	.stop = ingenic_rproc_stop,
>> +	.kick = ingenic_rproc_kick,
>> +	.da_to_va = ingenic_rproc_da_to_va,
>> +};
>> +
>> +static irqreturn_t vpu_interrupt(int irq, void *data)
>> +{
>> +	struct rproc *rproc = data;
>> +	struct vpu *vpu = rproc->priv;
>> +	u32 vring;
>> +
>> +	vring = readl(vpu->aux_base + REG_AUX_MSG);
>> +
>> +	/* Ack the interrupt */
>> +	writel(0, vpu->aux_base + REG_AUX_MSG_ACK);
>> +
>> +	return rproc_vq_interrupt(rproc, vring);
>> +}
>> +
>> +#ifdef CONFIG_OF
> 
> You don't need #ifdef here.
> 
>> +static const struct of_device_id ingenic_rproc_of_matches[] = {
> 
> Please move this down just before the ingenic_rproc_driver.
> 
>> +	{ .compatible = "ingenic,jz4770-vpu-rproc", },
>> +	{}
>> +};
>> +MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
>> +#endif
>> +
>> +static void ingenic_rproc_free(void *rproc)
>> +{
>> +	rproc_free(rproc);
>> +}
>> +
>> +static void ingenic_rproc_unregister(void *rproc)
>> +{
>> +	rproc_del(rproc);
>> +	rproc_shutdown(rproc);
>> +}
>> +
>> +static int ingenic_rproc_probe(struct platform_device *pdev)
>> +{
>> +	struct device *dev = &pdev->dev;
>> +	struct resource *mem;
>> +	struct rproc *rproc;
>> +	struct vpu *vpu;
>> +	unsigned int i;
>> +	int ret;
>> +
>> +	rproc = rproc_alloc(dev, "ingenic-vpu",
>> +			    &ingenic_rproc_ops, NULL, sizeof(*vpu));
>> +	if (!rproc)
>> +		return -ENOMEM;
>> +
>> +	ret = devm_add_action_or_reset(dev, ingenic_rproc_free, rproc);
> 
> Please write a patch adding devm_rproc_alloc() to the core.

Ok.

>> +	if (ret) {
>> +		dev_err(dev, "Unable to add action");
>> +		return ret;
>> +	}
>> +
>> +	platform_set_drvdata(pdev, rproc);
> 
> I don't see you getting the drvdata, so please skip this.
> 
>> +	vpu = rproc->priv;
>> +	vpu->dev = &pdev->dev;
>> +
>> +	mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aux");
>> +	vpu->aux_base = devm_ioremap_resource(dev, mem);
>> +	if (IS_ERR(vpu->aux_base)) {
>> +		dev_err(dev, "Failed to ioremap");
>> +		return PTR_ERR(vpu->aux_base);
>> +	}
>> +
>> +	for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
>> +		mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
>> +						   vpu_mem_map[i].name);
>> +
>> +		vpu->mem_info[i].base = devm_ioremap_resource(dev, mem);
>> +		if (IS_ERR(vpu->mem_info[i].base)) {
>> +			ret = PTR_ERR(vpu->mem_info[i].base);
>> +			dev_err(dev, "Failed to ioremap");
>> +			return ret;
>> +		}
>> +
>> +		vpu->mem_info[i].len = resource_size(mem);
>> +		vpu->mem_info[i].map = &vpu_mem_map[i];
>> +	}
>> +
>> +	vpu->vpu_clk = devm_clk_get(dev, "vpu");
>> +	if (IS_ERR(vpu->vpu_clk)) {
>> +		dev_err(dev, "Failed to get VPU clock");
>> +		return PTR_ERR(vpu->vpu_clk);
>> +	}
>> +
>> +	vpu->aux_clk = devm_clk_get(dev, "aux");
>> +	if (IS_ERR(vpu->aux_clk)) {
>> +		dev_err(dev, "Failed to get AUX clock");
>> +		return PTR_ERR(vpu->aux_clk);
>> +	}
>> +
>> +	vpu->irq = platform_get_irq(pdev, 0);
>> +	if (vpu->irq < 0) {
>> +		dev_err(dev, "Failed to get platform IRQ");
>> +		return vpu->irq;
>> +	}
>> +
>> +	ret = devm_request_irq(dev, vpu->irq, vpu_interrupt, 0, "VPU", 
>> rproc);
>> +	if (ret < 0) {
>> +		dev_err(dev, "Failed to request IRQ");
>> +		return ret;
>> +	}
>> +
>> +	disable_irq_nosync(vpu->irq);
>> +
>> +	ret = rproc_add(rproc);
>> +	if (ret) {
>> +		dev_err(dev, "Failed to register remote processor");
>> +		return ret;
>> +	}
>> +
>> +	ret = devm_add_action_or_reset(dev, ingenic_rproc_unregister, 
>> rproc);
> 
> Please add a devm_rproc_add() to the core.
> 
>> +	if (ret) {
>> +		dev_err(dev, "Unable to add action");
>> +		return ret;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static struct platform_driver ingenic_rproc_driver = {
>> +	.probe = ingenic_rproc_probe,
>> +	.driver = {
>> +		.name = "ingenic-vpu",
>> +		.owner = THIS_MODULE,
> 
> module_platform_driver() will assign .module for you.
> 
> Regards,
> Bjorn
> 
>> +		.of_match_table = of_match_ptr(ingenic_rproc_of_matches),
>> +	},
>> +};
>> +module_platform_driver(ingenic_rproc_driver);
>> +
>> +MODULE_LICENSE("GPL");
>> +MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
>> +MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");
>> --
>> 2.21.0.593.g511ec345e18
>> 

Re: [PATCH v2 1/3] dt-bindings: Document JZ47xx VPU auxiliary processor

[Rob Herring]

On Mon, Jul 29, 2019 at 02:31:07PM -0400, Paul Cercueil wrote:
> Inside the Video Processing Unit (VPU) of the recent JZ47xx SoCs from
> Ingenic is a second Xburst MIPS CPU very similar to the main core.
> This document describes the devicetree bindings for this auxiliary
> processor.
> 
> Signed-off-by: Paul Cercueil <paul@crapouillou.net>
> ---
> 
> Notes:
>     v2: Update TCSM0 address in example
> 
>  .../bindings/remoteproc/ingenic,vpu.txt       | 36 +++++++++++++++++++
>  1 file changed, 36 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt b/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
> new file mode 100644
> index 000000000000..576f9e582780
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
> @@ -0,0 +1,36 @@
> +* Ingenic JZ47xx auxiliary processor
> +
> +Inside the Video Processing Unit (VPU) of the recent JZ47xx SoCs from Ingenic
> +is a second Xburst MIPS CPU very similar to the main core.
> +This document describes the devicetree bindings for this auxiliary processor.
> +
> +Required properties:
> +- compatible: Should be "ingenic,jz4770-vpu-rproc"
> +- reg: Must contain the registers location and length for:
> +  * the auxiliary processor,
> +  * the Tightly Coupled Shared Memory 0 (TCSM0),
> +  * the Tightly Coupled Shared Memory 1 (TCSM1),
> +  * the shared SRAM.
> +- reg-names: Must contain "aux", "tcsm0", "tcsm1", "sram".
> +- clocks: Clock specifier for the AUX and VPU clocks.
> +- clock-names: Must contain "aux", "vpu".
> +- interrupts: Interrupt specifier for the VPU hardware block.
> +
> +Example:
> +
> +vpu: cpu@132a0000 {

cpu is reserved for CPUs under /cpus/. Use video-codec or video-decoder 
or ?? It's not clear what type of video processing this does.

> +	compatible = "ingenic,jz4770-vpu-rproc";
> +
> +	reg = <0x132a0000 0x20 /* AUX */
> +		   0x132b0000 0x4000 /* TCSM0 */
> +		   0x132c0000 0xc000 /* TCSM1 */
> +		   0x132f0000 0x7000 /* SRAM */
> +	>;
> +	reg-names = "aux", "tcsm0", "tcsm1", "sram";
> +
> +	clocks = <&cgu JZ4770_CLK_AUX>, <&cgu JZ4770_CLK_VPU>;
> +	clock-names = "aux", "vpu";
> +
> +	interrupt-parent = <&cpuintc>;
> +	interrupts = <3>;
> +};
> -- 
> 2.21.0.593.g511ec345e18
> 

Re: [PATCH v2 1/3] dt-bindings: Document JZ47xx VPU auxiliary processor

[Paul Cercueil]

Hi Rob,


Le mar. 20 août 2019 à 22:50, Rob Herring <robh@kernel.org> a écrit :
> On Mon, Jul 29, 2019 at 02:31:07PM -0400, Paul Cercueil wrote:
>>  Inside the Video Processing Unit (VPU) of the recent JZ47xx SoCs 
>> from
>>  Ingenic is a second Xburst MIPS CPU very similar to the main core.
>>  This document describes the devicetree bindings for this auxiliary
>>  processor.
>> 
>>  Signed-off-by: Paul Cercueil <paul@crapouillou.net>
>>  ---
>> 
>>  Notes:
>>      v2: Update TCSM0 address in example
>> 
>>   .../bindings/remoteproc/ingenic,vpu.txt       | 36 
>> +++++++++++++++++++
>>   1 file changed, 36 insertions(+)
>>   create mode 100644 
>> Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
>> 
>>  diff --git 
>> a/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt 
>> b/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
>>  new file mode 100644
>>  index 000000000000..576f9e582780
>>  --- /dev/null
>>  +++ b/Documentation/devicetree/bindings/remoteproc/ingenic,vpu.txt
>>  @@ -0,0 +1,36 @@
>>  +* Ingenic JZ47xx auxiliary processor
>>  +
>>  +Inside the Video Processing Unit (VPU) of the recent JZ47xx SoCs 
>> from Ingenic
>>  +is a second Xburst MIPS CPU very similar to the main core.
>>  +This document describes the devicetree bindings for this auxiliary 
>> processor.
>>  +
>>  +Required properties:
>>  +- compatible: Should be "ingenic,jz4770-vpu-rproc"
>>  +- reg: Must contain the registers location and length for:
>>  +  * the auxiliary processor,
>>  +  * the Tightly Coupled Shared Memory 0 (TCSM0),
>>  +  * the Tightly Coupled Shared Memory 1 (TCSM1),
>>  +  * the shared SRAM.
>>  +- reg-names: Must contain "aux", "tcsm0", "tcsm1", "sram".
>>  +- clocks: Clock specifier for the AUX and VPU clocks.
>>  +- clock-names: Must contain "aux", "vpu".
>>  +- interrupts: Interrupt specifier for the VPU hardware block.
>>  +
>>  +Example:
>>  +
>>  +vpu: cpu@132a0000 {
> 
> cpu is reserved for CPUs under /cpus/. Use video-codec or 
> video-decoder
> or ?? It's not clear what type of video processing this does.

Hardware decode and encode of mpeg-2 and h264. I guess I'll use 
'video-decoder' then.


> 
>>  +	compatible = "ingenic,jz4770-vpu-rproc";
>>  +
>>  +	reg = <0x132a0000 0x20 /* AUX */
>>  +		   0x132b0000 0x4000 /* TCSM0 */
>>  +		   0x132c0000 0xc000 /* TCSM1 */
>>  +		   0x132f0000 0x7000 /* SRAM */
>>  +	>;
>>  +	reg-names = "aux", "tcsm0", "tcsm1", "sram";
>>  +
>>  +	clocks = <&cgu JZ4770_CLK_AUX>, <&cgu JZ4770_CLK_VPU>;
>>  +	clock-names = "aux", "vpu";
>>  +
>>  +	interrupt-parent = <&cpuintc>;
>>  +	interrupts = <3>;
>>  +};
>>  --
>>  2.21.0.593.g511ec345e18
>>