[PATCH V3 0/8] remoteproc: imx_rproc: support i.MX7ULP/8MN/8MP

[PATCH V3 0/8] remoteproc: imx_rproc: support i.MX7ULP/8MN/8MP

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

V3:
 Add A-b tag for Patch 1/2
 Fix the checkpatch warning for Patch 6,8

V2:
 Patch 1/8, use fsl as vendor, typo fix
 Because patchset [1] has v2 version, patch 5,6,7,8 are adapted that
 change.

This patchset is to support i.MX7ULP/8MN/8MP, also includes a patch to
parse fsl,auto-boot
This patchset depends on [1]

[1] https://patchwork.kernel.org/project/linux-remoteproc/cover/
    1617846289-13496-1-git-send-email-peng.fan@oss.nxp.com/

Peng Fan (8):
  dt-bindings: remoteproc: imx_rproc: add fsl,auto-boot property
  dt-bindings: remoteproc: imx_rproc: add i.MX7ULP support
  dt-bindings: remoteproc: imx_rproc: support i.MX8MN/P
  remoteproc: imx_rproc: make clk optional
  remoteproc: imx_rproc: parse fsl,auto-boot
  remoteproc: imx_rproc: initial support for mutilple start/stop method
  remoteproc: imx_rproc: support i.MX7ULP
  remoteproc: imx_rproc: support i.MX8MN/P

 .../bindings/remoteproc/fsl,imx-rproc.yaml    |  11 +-
 drivers/remoteproc/imx_rproc.c                | 170 +++++++++++++++---
 2 files changed, 159 insertions(+), 22 deletions(-)

-- 
2.30.0

[PATCH V3 1/8] dt-bindings: remoteproc: imx_rproc: add fsl,auto-boot property

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

Add an optional property "fsl,auto-boot" to indicate remote processor
auto boot.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/remoteproc/fsl,imx-rproc.yaml       | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
index 208a628f8d6c..b13bf8d70488 100644
--- a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
@@ -49,6 +49,12 @@ properties:
     minItems: 1
     maxItems: 32
 
+  fsl,auto-boot:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Indicate whether need to load the default firmware and start the remote
+      processor automatically.
+
 required:
   - compatible
   - clocks
-- 
2.30.0

[PATCH V3 2/8] dt-bindings: remoteproc: imx_rproc: add i.MX7ULP support

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

Add i.MX7ULP compatible.

We use i.MX7ULP dual mode and in which case i.MX7ULP A7 core runs under
control of M4 core, M4 core starts by ROM and powers most serivces used
by A7 core, so A7 core has no power to start and stop M4 core. So
clocks and syscon are not required.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../devicetree/bindings/remoteproc/fsl,imx-rproc.yaml          | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
index b13bf8d70488..58bc2a23f97b 100644
--- a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
@@ -18,6 +18,7 @@ properties:
       - fsl,imx8mq-cm4
       - fsl,imx8mm-cm4
       - fsl,imx7d-cm4
+      - fsl,imx7ulp-cm4
       - fsl,imx6sx-cm4
 
   clocks:
@@ -57,8 +58,6 @@ properties:
 
 required:
   - compatible
-  - clocks
-  - syscon
 
 additionalProperties: false
 
-- 
2.30.0

Re: [PATCH V3 2/8] dt-bindings: remoteproc: imx_rproc: add i.MX7ULP support

[Mathieu Poirier]

On Thu, Apr 08, 2021 at 09:54:52AM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Add i.MX7ULP compatible.
> 
> We use i.MX7ULP dual mode and in which case i.MX7ULP A7 core runs under
> control of M4 core, M4 core starts by ROM and powers most serivces used

s/serivces/services

> by A7 core, so A7 core has no power to start and stop M4 core. So
> clocks and syscon are not required.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> Acked-by: Rob Herring <robh@kernel.org>
> ---
>  .../devicetree/bindings/remoteproc/fsl,imx-rproc.yaml          | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
> index b13bf8d70488..58bc2a23f97b 100644
> --- a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
> +++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
> @@ -18,6 +18,7 @@ properties:
>        - fsl,imx8mq-cm4
>        - fsl,imx8mm-cm4
>        - fsl,imx7d-cm4
> +      - fsl,imx7ulp-cm4
>        - fsl,imx6sx-cm4
>  
>    clocks:
> @@ -57,8 +58,6 @@ properties:
>  
>  required:
>    - compatible
> -  - clocks
> -  - syscon
>  
>  additionalProperties: false
>  
> -- 
> 2.30.0
> 

[PATCH V3 3/8] dt-bindings: remoteproc: imx_rproc: support i.MX8MN/P

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

Add i.MX8MN/P remote processor(Cortex-M7) compatible string

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
index 58bc2a23f97b..1dc34cf5a4ea 100644
--- a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
@@ -17,6 +17,8 @@ properties:
     enum:
       - fsl,imx8mq-cm4
       - fsl,imx8mm-cm4
+      - fsl,imx8mn-cm7
+      - fsl,imx8mp-cm7
       - fsl,imx7d-cm4
       - fsl,imx7ulp-cm4
       - fsl,imx6sx-cm4
-- 
2.30.0

[PATCH V3 4/8] remoteproc: imx_rproc: make clk optional

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

To i.MX7ULP, M4 is the master to control everything, so it not need
clk from A7.

Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/imx_rproc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index d6338872c6db..ca17f520d904 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -635,7 +635,7 @@ static int imx_rproc_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_put_mbox;
 
-	priv->clk = devm_clk_get(dev, NULL);
+	priv->clk = devm_clk_get_optional(dev, NULL);
 	if (IS_ERR(priv->clk)) {
 		dev_err(dev, "Failed to get clock\n");
 		ret = PTR_ERR(priv->clk);
-- 
2.30.0

Re: [PATCH V3 4/8] remoteproc: imx_rproc: make clk optional

[Mathieu Poirier]

On Thu, Apr 08, 2021 at 09:54:54AM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> To i.MX7ULP, M4 is the master to control everything, so it not need
> clk from A7.
> 
> Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/remoteproc/imx_rproc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index d6338872c6db..ca17f520d904 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -635,7 +635,7 @@ static int imx_rproc_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto err_put_mbox;
>  
> -	priv->clk = devm_clk_get(dev, NULL);
> +	priv->clk = devm_clk_get_optional(dev, NULL);

Overnight the clock becomes optional for all remote processors?  Why not call
devm_clk_get() or devm_clk_get_optional() based on the remote processor type in
a new function called imx_rproc_clk_get()?

>  	if (IS_ERR(priv->clk)) {
>  		dev_err(dev, "Failed to get clock\n");
>  		ret = PTR_ERR(priv->clk);
> -- 
> 2.30.0
> 

[PATCH V3 5/8] remoteproc: imx_rproc: parse fsl,auto-boot

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

Parse fsl,auto-boot to indicate whether need remoteproc framework
auto boot or not.

When remote processor is booted before Linux Kernel up, do not parse
fsl,auto-boot. So add an entry to store the working mode of remote
processor. Currently only IMX_RPROC_NORMAL, IMX_RPROC_EARLY_BOOT.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/imx_rproc.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index ca17f520d904..c576e12d3817 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -83,6 +83,16 @@ struct imx_rproc_dcfg {
 	size_t				att_size;
 };
 
+enum imx_rproc_mode {
+	/* Linux load/kick remote core */
+	IMX_RPROC_NORMAL,
+	/*
+	 * remote core booted before kicking Linux, and remote core
+	 * could be stopped & restarted by Linux
+	 */
+	IMX_RPROC_EARLY_BOOT,
+};
+
 struct imx_rproc {
 	struct device			*dev;
 	struct regmap			*regmap;
@@ -96,6 +106,7 @@ struct imx_rproc {
 	struct work_struct		rproc_work;
 	struct workqueue_struct		*workqueue;
 	void __iomem			*rsc_table;
+	enum imx_rproc_mode		mode;
 };
 
 static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
@@ -565,14 +576,18 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
 	int ret;
 	u32 val;
 
+	priv->mode = IMX_RPROC_NORMAL;
+
 	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
 	if (ret) {
 		dev_err(dev, "Failed to read src\n");
 		return ret;
 	}
 
-	if (!(val & dcfg->src_stop))
+	if (!(val & dcfg->src_stop)) {
+		priv->mode = IMX_RPROC_EARLY_BOOT;
 		priv->rproc->state = RPROC_DETACHED;
+	}
 
 	return 0;
 }
@@ -654,6 +669,9 @@ static int imx_rproc_probe(struct platform_device *pdev)
 
 	INIT_WORK(&priv->rproc_work, imx_rproc_vq_work);
 
+	if (priv->mode == IMX_RPROC_NORMAL)
+		rproc->auto_boot = of_property_read_bool(np, "fsl,auto-boot");
+
 	ret = rproc_add(rproc);
 	if (ret) {
 		dev_err(dev, "rproc_add failed\n");
-- 
2.30.0

Re: [PATCH V3 5/8] remoteproc: imx_rproc: parse fsl,auto-boot

[Mathieu Poirier]

On Thu, Apr 08, 2021 at 09:54:55AM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Parse fsl,auto-boot to indicate whether need remoteproc framework
> auto boot or not.
> 
> When remote processor is booted before Linux Kernel up, do not parse
> fsl,auto-boot. So add an entry to store the working mode of remote
> processor. Currently only IMX_RPROC_NORMAL, IMX_RPROC_EARLY_BOOT.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/remoteproc/imx_rproc.c | 20 +++++++++++++++++++-
>  1 file changed, 19 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index ca17f520d904..c576e12d3817 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -83,6 +83,16 @@ struct imx_rproc_dcfg {
>  	size_t				att_size;
>  };
>  
> +enum imx_rproc_mode {
> +	/* Linux load/kick remote core */
> +	IMX_RPROC_NORMAL,
> +	/*
> +	 * remote core booted before kicking Linux, and remote core
> +	 * could be stopped & restarted by Linux
> +	 */
> +	IMX_RPROC_EARLY_BOOT,
> +};
> +

As far as I can see a new mode to track the state of the remote processor is not
needed.  rproc->state can do that for you.

>  struct imx_rproc {
>  	struct device			*dev;
>  	struct regmap			*regmap;
> @@ -96,6 +106,7 @@ struct imx_rproc {
>  	struct work_struct		rproc_work;
>  	struct workqueue_struct		*workqueue;
>  	void __iomem			*rsc_table;
> +	enum imx_rproc_mode		mode;
>  };
>  
>  static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
> @@ -565,14 +576,18 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
>  	int ret;
>  	u32 val;
>  
> +	priv->mode = IMX_RPROC_NORMAL;
> +
>  	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
>  	if (ret) {
>  		dev_err(dev, "Failed to read src\n");
>  		return ret;
>  	}
>  
> -	if (!(val & dcfg->src_stop))
> +	if (!(val & dcfg->src_stop)) {
> +		priv->mode = IMX_RPROC_EARLY_BOOT;
>  		priv->rproc->state = RPROC_DETACHED;
> +	}
>  
>  	return 0;
>  }
> @@ -654,6 +669,9 @@ static int imx_rproc_probe(struct platform_device *pdev)
>  
>  	INIT_WORK(&priv->rproc_work, imx_rproc_vq_work);
>  
> +	if (priv->mode == IMX_RPROC_NORMAL)
> +		rproc->auto_boot = of_property_read_bool(np, "fsl,auto-boot");
> +

        if (rproc->state == RPROC_DETACHED)

>  	ret = rproc_add(rproc);
>  	if (ret) {
>  		dev_err(dev, "rproc_add failed\n");
> -- 
> 2.30.0
> 

[PATCH V3 6/8] remoteproc: imx_rproc: initial support for mutilple start/stop method

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

Add three methods IMX_RPROC_NONE(no need start/stop), IMX_RPROC_MMIO
(start/stop through mmio) and IMX_RPROC_SMC(start/stop through ARM SMCCC).

The current SoCs supported are all using IMX_RPROC_MMIO, add a restrict
in probe that only SoCs using IMX_RPROC_MMIO needs syscon regmap to
access registers.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/imx_rproc.c | 50 +++++++++++++++++++++++-----------
 1 file changed, 34 insertions(+), 16 deletions(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index c576e12d3817..a7fa9d7fc2d1 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -74,6 +74,15 @@ struct imx_rproc_att {
 	int flags;
 };
 
+/* Remote core start/stop method */
+enum imx_rproc_method {
+	IMX_RPROC_NONE,
+	/* Through syscon regmap */
+	IMX_RPROC_MMIO,
+	/* Through ARM SMCCC */
+	IMX_RPROC_SMC,
+};
+
 struct imx_rproc_dcfg {
 	u32				src_reg;
 	u32				src_mask;
@@ -81,6 +90,7 @@ struct imx_rproc_dcfg {
 	u32				src_stop;
 	const struct imx_rproc_att	*att;
 	size_t				att_size;
+	enum imx_rproc_method		method;
 };
 
 enum imx_rproc_mode {
@@ -194,6 +204,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
 	.src_stop	= IMX7D_M4_STOP,
 	.att		= imx_rproc_att_imx8mq,
 	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mq),
+	.method		= IMX_RPROC_MMIO,
 };
 
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
@@ -203,6 +214,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
 	.src_stop	= IMX7D_M4_STOP,
 	.att		= imx_rproc_att_imx7d,
 	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7d),
+	.method		= IMX_RPROC_MMIO,
 };
 
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
@@ -212,6 +224,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
 	.src_stop	= IMX6SX_M4_STOP,
 	.att		= imx_rproc_att_imx6sx,
 	.att_size	= ARRAY_SIZE(imx_rproc_att_imx6sx),
+	.method		= IMX_RPROC_MMIO,
 };
 
 static int imx_rproc_start(struct rproc *rproc)
@@ -578,15 +591,17 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
 
 	priv->mode = IMX_RPROC_NORMAL;
 
-	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
-	if (ret) {
-		dev_err(dev, "Failed to read src\n");
-		return ret;
-	}
+	if (priv->regmap) {
+		ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
+		if (ret) {
+			dev_err(dev, "Failed to read src\n");
+			return ret;
+		}
 
-	if (!(val & dcfg->src_stop)) {
-		priv->mode = IMX_RPROC_EARLY_BOOT;
-		priv->rproc->state = RPROC_DETACHED;
+		if (!(val & dcfg->src_stop)) {
+			priv->rproc->state = RPROC_DETACHED;
+			priv->mode = IMX_RPROC_EARLY_BOOT;
+		}
 	}
 
 	return 0;
@@ -600,16 +615,9 @@ static int imx_rproc_probe(struct platform_device *pdev)
 	struct rproc *rproc;
 	struct regmap_config config = { .name = "imx-rproc" };
 	const struct imx_rproc_dcfg *dcfg;
-	struct regmap *regmap;
+	struct regmap *regmap = NULL;
 	int ret;
 
-	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
-	if (IS_ERR(regmap)) {
-		dev_err(dev, "failed to find syscon\n");
-		return PTR_ERR(regmap);
-	}
-	regmap_attach_dev(dev, regmap, &config);
-
 	/* set some other name then imx */
 	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
 			    NULL, sizeof(*priv));
@@ -622,6 +630,16 @@ static int imx_rproc_probe(struct platform_device *pdev)
 		goto err_put_rproc;
 	}
 
+	if (dcfg->method == IMX_RPROC_MMIO) {
+		regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
+		if (IS_ERR(regmap)) {
+			dev_err(dev, "failed to find syscon\n");
+			ret = PTR_ERR(regmap);
+			goto err_put_rproc;
+		}
+		regmap_attach_dev(dev, regmap, &config);
+	}
+
 	priv = rproc->priv;
 	priv->rproc = rproc;
 	priv->regmap = regmap;
-- 
2.30.0

Re: [PATCH V3 6/8] remoteproc: imx_rproc: initial support for mutilple start/stop method

[Mathieu Poirier]

On Thu, Apr 08, 2021 at 09:54:56AM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Add three methods IMX_RPROC_NONE(no need start/stop), IMX_RPROC_MMIO
> (start/stop through mmio) and IMX_RPROC_SMC(start/stop through ARM SMCCC).
> 
> The current SoCs supported are all using IMX_RPROC_MMIO, add a restrict
> in probe that only SoCs using IMX_RPROC_MMIO needs syscon regmap to
> access registers.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/remoteproc/imx_rproc.c | 50 +++++++++++++++++++++++-----------
>  1 file changed, 34 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index c576e12d3817..a7fa9d7fc2d1 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -74,6 +74,15 @@ struct imx_rproc_att {
>  	int flags;
>  };
>  
> +/* Remote core start/stop method */
> +enum imx_rproc_method {
> +	IMX_RPROC_NONE,
> +	/* Through syscon regmap */
> +	IMX_RPROC_MMIO,
> +	/* Through ARM SMCCC */
> +	IMX_RPROC_SMC,
> +};
> +
>  struct imx_rproc_dcfg {
>  	u32				src_reg;
>  	u32				src_mask;
> @@ -81,6 +90,7 @@ struct imx_rproc_dcfg {
>  	u32				src_stop;
>  	const struct imx_rproc_att	*att;
>  	size_t				att_size;
> +	enum imx_rproc_method		method;
>  };
>  
>  enum imx_rproc_mode {
> @@ -194,6 +204,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
>  	.src_stop	= IMX7D_M4_STOP,
>  	.att		= imx_rproc_att_imx8mq,
>  	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mq),
> +	.method		= IMX_RPROC_MMIO,
>  };
>  
>  static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
> @@ -203,6 +214,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
>  	.src_stop	= IMX7D_M4_STOP,
>  	.att		= imx_rproc_att_imx7d,
>  	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7d),
> +	.method		= IMX_RPROC_MMIO,
>  };
>  
>  static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
> @@ -212,6 +224,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
>  	.src_stop	= IMX6SX_M4_STOP,
>  	.att		= imx_rproc_att_imx6sx,
>  	.att_size	= ARRAY_SIZE(imx_rproc_att_imx6sx),
> +	.method		= IMX_RPROC_MMIO,
>  };
>  
>  static int imx_rproc_start(struct rproc *rproc)
> @@ -578,15 +591,17 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
>  
>  	priv->mode = IMX_RPROC_NORMAL;
>  
> -	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
> -	if (ret) {
> -		dev_err(dev, "Failed to read src\n");
> -		return ret;
> -	}
> +	if (priv->regmap) {
> +		ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
> +		if (ret) {
> +			dev_err(dev, "Failed to read src\n");
> +			return ret;
> +		}
>  
> -	if (!(val & dcfg->src_stop)) {
> -		priv->mode = IMX_RPROC_EARLY_BOOT;
> -		priv->rproc->state = RPROC_DETACHED;
> +		if (!(val & dcfg->src_stop)) {
> +			priv->rproc->state = RPROC_DETACHED;
> +			priv->mode = IMX_RPROC_EARLY_BOOT;
> +		}
>  	}
>  
>  	return 0;
> @@ -600,16 +615,9 @@ static int imx_rproc_probe(struct platform_device *pdev)
>  	struct rproc *rproc;
>  	struct regmap_config config = { .name = "imx-rproc" };
>  	const struct imx_rproc_dcfg *dcfg;
> -	struct regmap *regmap;
> +	struct regmap *regmap = NULL;
>  	int ret;
>  
> -	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
> -	if (IS_ERR(regmap)) {
> -		dev_err(dev, "failed to find syscon\n");
> -		return PTR_ERR(regmap);
> -	}
> -	regmap_attach_dev(dev, regmap, &config);
> -
>  	/* set some other name then imx */
>  	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
>  			    NULL, sizeof(*priv));
> @@ -622,6 +630,16 @@ static int imx_rproc_probe(struct platform_device *pdev)
>  		goto err_put_rproc;
>  	}
>  
> +	if (dcfg->method == IMX_RPROC_MMIO) {
> +		regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
> +		if (IS_ERR(regmap)) {
> +			dev_err(dev, "failed to find syscon\n");
> +			ret = PTR_ERR(regmap);
> +			goto err_put_rproc;
> +		}
> +		regmap_attach_dev(dev, regmap, &config);
> +	}

I would move this to imx_rproc_detect_mode() and get rid of the "if
(priv->regmap)" that is there.

> +
>  	priv = rproc->priv;
>  	priv->rproc = rproc;
>  	priv->regmap = regmap;
> -- 
> 2.30.0
> 

[PATCH V3 7/8] remoteproc: imx_rproc: support i.MX7ULP

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

i.MX7ULP A7 core runs under control of M4 core, M4 core starts by ROM
and powers most serivces used by A7 core, so A7 core has no power to
start and stop M4 core.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/imx_rproc.c | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index a7fa9d7fc2d1..b911a7539897 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -147,6 +147,14 @@ static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
 	{ 0x40000000, 0x40000000, 0x80000000, 0 },
 };
 
+static const struct imx_rproc_att imx_rproc_att_imx7ulp[] = {
+	{0x1FFD0000, 0x1FFD0000, 0x30000, ATT_OWN},
+	{0x20000000, 0x20000000, 0x10000, ATT_OWN},
+	{0x2F000000, 0x2F000000, 0x20000, ATT_OWN},
+	{0x2F020000, 0x2F020000, 0x20000, ATT_OWN},
+	{0x60000000, 0x60000000, 0x40000000, 0}
+};
+
 static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
 	/* dev addr , sys addr  , size	    , flags */
 	/* OCRAM_S (M4 Boot code) - alias */
@@ -207,6 +215,12 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
 	.method		= IMX_RPROC_MMIO,
 };
 
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx7ulp = {
+	.att		= imx_rproc_att_imx7ulp,
+	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7ulp),
+	.method		= IMX_RPROC_NONE,
+};
+
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
 	.src_reg	= IMX7D_SRC_SCR,
 	.src_mask	= IMX7D_M4_RST_MASK,
@@ -598,12 +612,16 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
 			return ret;
 		}
 
-		if (!(val & dcfg->src_stop)) {
-			priv->rproc->state = RPROC_DETACHED;
+		if (!(val & dcfg->src_stop))
 			priv->mode = IMX_RPROC_EARLY_BOOT;
-		}
 	}
 
+	if (dcfg->method == IMX_RPROC_NONE)
+		priv->mode = IMX_RPROC_EARLY_BOOT;
+
+	if (priv->mode == IMX_RPROC_EARLY_BOOT)
+		priv->rproc->state = RPROC_DETACHED;
+
 	return 0;
 }
 
@@ -724,6 +742,7 @@ static int imx_rproc_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id imx_rproc_of_match[] = {
+	{ .compatible = "fsl,imx7ulp-cm4", .data = &imx_rproc_cfg_imx7ulp },
 	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
 	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
 	{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
-- 
2.30.0

Re: [PATCH V3 7/8] remoteproc: imx_rproc: support i.MX7ULP

[Mathieu Poirier]

On Thu, Apr 08, 2021 at 09:54:57AM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> i.MX7ULP A7 core runs under control of M4 core, M4 core starts by ROM
> and powers most serivces used by A7 core, so A7 core has no power to
> start and stop M4 core.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/remoteproc/imx_rproc.c | 25 ++++++++++++++++++++++---
>  1 file changed, 22 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index a7fa9d7fc2d1..b911a7539897 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -147,6 +147,14 @@ static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
>  	{ 0x40000000, 0x40000000, 0x80000000, 0 },
>  };
>  
> +static const struct imx_rproc_att imx_rproc_att_imx7ulp[] = {
> +	{0x1FFD0000, 0x1FFD0000, 0x30000, ATT_OWN},
> +	{0x20000000, 0x20000000, 0x10000, ATT_OWN},
> +	{0x2F000000, 0x2F000000, 0x20000, ATT_OWN},
> +	{0x2F020000, 0x2F020000, 0x20000, ATT_OWN},
> +	{0x60000000, 0x60000000, 0x40000000, 0}
> +};
> +
>  static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
>  	/* dev addr , sys addr  , size	    , flags */
>  	/* OCRAM_S (M4 Boot code) - alias */
> @@ -207,6 +215,12 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
>  	.method		= IMX_RPROC_MMIO,
>  };
>  
> +static const struct imx_rproc_dcfg imx_rproc_cfg_imx7ulp = {
> +	.att		= imx_rproc_att_imx7ulp,
> +	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7ulp),
> +	.method		= IMX_RPROC_NONE,
> +};
> +
>  static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
>  	.src_reg	= IMX7D_SRC_SCR,
>  	.src_mask	= IMX7D_M4_RST_MASK,
> @@ -598,12 +612,16 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
>  			return ret;
>  		}
>  
> -		if (!(val & dcfg->src_stop)) {
> -			priv->rproc->state = RPROC_DETACHED;
> +		if (!(val & dcfg->src_stop))
>  			priv->mode = IMX_RPROC_EARLY_BOOT;
> -		}
>  	}
>  
> +	if (dcfg->method == IMX_RPROC_NONE)
> +		priv->mode = IMX_RPROC_EARLY_BOOT;

As I pointed out there is no need for priv->mode.  Just declare a boolean
variable that is local to this function and use it to determine the state of the
remote processor:

        if (dcfg->method == IMX_RPROC_NONE)
                early_boot = true;

        if (early_boot)
                priv->rproc->state = RPROC_DETACHED;

> +
> +	if (priv->mode == IMX_RPROC_EARLY_BOOT)
> +		priv->rproc->state = RPROC_DETACHED;
> +
>  	return 0;
>  }
>  
> @@ -724,6 +742,7 @@ static int imx_rproc_remove(struct platform_device *pdev)
>  }
>  
>  static const struct of_device_id imx_rproc_of_match[] = {
> +	{ .compatible = "fsl,imx7ulp-cm4", .data = &imx_rproc_cfg_imx7ulp },
>  	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
>  	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
>  	{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
> -- 
> 2.30.0
> 

[PATCH V3 8/8] remoteproc: imx_rproc: support i.MX8MN/P

[peng.fan]

From: Peng Fan <peng.fan@nxp.com>

Add i.MX8MN/P remote processor(Cortex-M7) support, we are using ARM
SMCCC to start/stop M core, not using regmap interface.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/remoteproc/imx_rproc.c | 89 +++++++++++++++++++++++++++++++---
 1 file changed, 82 insertions(+), 7 deletions(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index b911a7539897..9351626f09c0 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
  */
 
+#include <linux/arm-smccc.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/interrupt.h>
@@ -50,6 +51,11 @@
 
 #define IMX_RPROC_MEM_MAX		32
 
+#define IMX_SIP_RPROC			0xC2000005
+#define IMX_SIP_RPROC_START		0x00
+#define IMX_SIP_RPROC_STARTED		0x01
+#define IMX_SIP_RPROC_STOP		0x02
+
 /**
  * struct imx_rproc_mem - slim internal memory structure
  * @cpu_addr: MPU virtual address of the memory region
@@ -119,6 +125,36 @@ struct imx_rproc {
 	enum imx_rproc_mode		mode;
 };
 
+static const struct imx_rproc_att imx_rproc_att_imx8mn[] = {
+	/* dev addr , sys addr  , size	    , flags */
+	/* ITCM   */
+	{ 0x00000000, 0x007E0000, 0x00020000, ATT_OWN },
+	/* OCRAM_S */
+	{ 0x00180000, 0x00180000, 0x00009000, 0 },
+	/* OCRAM */
+	{ 0x00900000, 0x00900000, 0x00020000, 0 },
+	/* OCRAM */
+	{ 0x00920000, 0x00920000, 0x00020000, 0 },
+	/* OCRAM */
+	{ 0x00940000, 0x00940000, 0x00050000, 0 },
+	/* QSPI Code - alias */
+	{ 0x08000000, 0x08000000, 0x08000000, 0 },
+	/* DDR (Code) - alias */
+	{ 0x10000000, 0x40000000, 0x0FFE0000, 0 },
+	/* DTCM */
+	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN },
+	/* OCRAM_S - alias */
+	{ 0x20180000, 0x00180000, 0x00008000, ATT_OWN },
+	/* OCRAM */
+	{ 0x20200000, 0x00900000, 0x00020000, ATT_OWN },
+	/* OCRAM */
+	{ 0x20220000, 0x00920000, 0x00020000, ATT_OWN },
+	/* OCRAM */
+	{ 0x20240000, 0x00940000, 0x00040000, ATT_OWN },
+	/* DDR (Data) */
+	{ 0x40000000, 0x40000000, 0x80000000, 0 },
+};
+
 static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
 	/* dev addr , sys addr  , size	    , flags */
 	/* TCML - alias */
@@ -205,6 +241,12 @@ static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
 	{ 0x80000000, 0x80000000, 0x60000000, 0 },
 };
 
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn = {
+	.att		= imx_rproc_att_imx8mn,
+	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mn),
+	.method		= IMX_RPROC_SMC,
+};
+
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
 	.src_reg	= IMX7D_SRC_SCR,
 	.src_mask	= IMX7D_M4_RST_MASK,
@@ -246,12 +288,24 @@ static int imx_rproc_start(struct rproc *rproc)
 	struct imx_rproc *priv = rproc->priv;
 	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
 	struct device *dev = priv->dev;
+	struct arm_smccc_res res;
 	int ret;
 
-	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
-				 dcfg->src_mask, dcfg->src_start);
+	switch (dcfg->method) {
+	case IMX_RPROC_MMIO:
+		ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
+					 dcfg->src_start);
+		break;
+	case IMX_RPROC_SMC:
+		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_START, 0, 0, 0, 0, 0, 0, &res);
+		ret = res.a0;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
 	if (ret)
-		dev_err(dev, "Failed to enable M4!\n");
+		dev_err(dev, "Failed to enable remote cores!\n");
 
 	return ret;
 }
@@ -261,12 +315,26 @@ static int imx_rproc_stop(struct rproc *rproc)
 	struct imx_rproc *priv = rproc->priv;
 	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
 	struct device *dev = priv->dev;
+	struct arm_smccc_res res;
 	int ret;
 
-	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
-				 dcfg->src_mask, dcfg->src_stop);
+	switch (dcfg->method) {
+	case IMX_RPROC_MMIO:
+		ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
+					 dcfg->src_stop);
+		break;
+	case IMX_RPROC_SMC:
+		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STOP, 0, 0, 0, 0, 0, 0, &res);
+		ret = res.a0;
+		if (res.a1)
+			dev_info(dev, "Not in wfi, force stopped\n");
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
 	if (ret)
-		dev_err(dev, "Failed to stop M4!\n");
+		dev_err(dev, "Failed to stop remote cores\n");
 
 	return ret;
 }
@@ -600,6 +668,7 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
 {
 	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
 	struct device *dev = priv->dev;
+	struct arm_smccc_res res;
 	int ret;
 	u32 val;
 
@@ -616,8 +685,12 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
 			priv->mode = IMX_RPROC_EARLY_BOOT;
 	}
 
-	if (dcfg->method == IMX_RPROC_NONE)
+	if (dcfg->method == IMX_RPROC_NONE) {
 		priv->mode = IMX_RPROC_EARLY_BOOT;
+	} else if (dcfg->method == IMX_RPROC_SMC) {
+		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STARTED, 0, 0, 0, 0, 0, 0, &res);
+		priv->mode = res.a0 ? IMX_RPROC_EARLY_BOOT : IMX_RPROC_NORMAL;
+	}
 
 	if (priv->mode == IMX_RPROC_EARLY_BOOT)
 		priv->rproc->state = RPROC_DETACHED;
@@ -747,6 +820,8 @@ static const struct of_device_id imx_rproc_of_match[] = {
 	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
 	{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
 	{ .compatible = "fsl,imx8mm-cm4", .data = &imx_rproc_cfg_imx8mq },
+	{ .compatible = "fsl,imx8mn-cm7", .data = &imx_rproc_cfg_imx8mn },
+	{ .compatible = "fsl,imx8mp-cm7", .data = &imx_rproc_cfg_imx8mn },
 	{},
 };
 MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
-- 
2.30.0

Re: [PATCH V3 8/8] remoteproc: imx_rproc: support i.MX8MN/P

[Mathieu Poirier]

On Thu, Apr 08, 2021 at 09:54:58AM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Add i.MX8MN/P remote processor(Cortex-M7) support, we are using ARM
> SMCCC to start/stop M core, not using regmap interface.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/remoteproc/imx_rproc.c | 89 +++++++++++++++++++++++++++++++---
>  1 file changed, 82 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index b911a7539897..9351626f09c0 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -3,6 +3,7 @@
>   * Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
>   */
>  
> +#include <linux/arm-smccc.h>
>  #include <linux/clk.h>
>  #include <linux/err.h>
>  #include <linux/interrupt.h>
> @@ -50,6 +51,11 @@
>  
>  #define IMX_RPROC_MEM_MAX		32
>  
> +#define IMX_SIP_RPROC			0xC2000005
> +#define IMX_SIP_RPROC_START		0x00
> +#define IMX_SIP_RPROC_STARTED		0x01
> +#define IMX_SIP_RPROC_STOP		0x02
> +
>  /**
>   * struct imx_rproc_mem - slim internal memory structure
>   * @cpu_addr: MPU virtual address of the memory region
> @@ -119,6 +125,36 @@ struct imx_rproc {
>  	enum imx_rproc_mode		mode;
>  };
>  
> +static const struct imx_rproc_att imx_rproc_att_imx8mn[] = {
> +	/* dev addr , sys addr  , size	    , flags */
> +	/* ITCM   */
> +	{ 0x00000000, 0x007E0000, 0x00020000, ATT_OWN },
> +	/* OCRAM_S */
> +	{ 0x00180000, 0x00180000, 0x00009000, 0 },
> +	/* OCRAM */
> +	{ 0x00900000, 0x00900000, 0x00020000, 0 },
> +	/* OCRAM */
> +	{ 0x00920000, 0x00920000, 0x00020000, 0 },
> +	/* OCRAM */
> +	{ 0x00940000, 0x00940000, 0x00050000, 0 },
> +	/* QSPI Code - alias */
> +	{ 0x08000000, 0x08000000, 0x08000000, 0 },
> +	/* DDR (Code) - alias */
> +	{ 0x10000000, 0x40000000, 0x0FFE0000, 0 },
> +	/* DTCM */
> +	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN },
> +	/* OCRAM_S - alias */
> +	{ 0x20180000, 0x00180000, 0x00008000, ATT_OWN },
> +	/* OCRAM */
> +	{ 0x20200000, 0x00900000, 0x00020000, ATT_OWN },
> +	/* OCRAM */
> +	{ 0x20220000, 0x00920000, 0x00020000, ATT_OWN },
> +	/* OCRAM */
> +	{ 0x20240000, 0x00940000, 0x00040000, ATT_OWN },
> +	/* DDR (Data) */
> +	{ 0x40000000, 0x40000000, 0x80000000, 0 },
> +};
> +
>  static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
>  	/* dev addr , sys addr  , size	    , flags */
>  	/* TCML - alias */
> @@ -205,6 +241,12 @@ static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
>  	{ 0x80000000, 0x80000000, 0x60000000, 0 },
>  };
>  
> +static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn = {
> +	.att		= imx_rproc_att_imx8mn,
> +	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mn),
> +	.method		= IMX_RPROC_SMC,
> +};
> +
>  static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
>  	.src_reg	= IMX7D_SRC_SCR,
>  	.src_mask	= IMX7D_M4_RST_MASK,
> @@ -246,12 +288,24 @@ static int imx_rproc_start(struct rproc *rproc)
>  	struct imx_rproc *priv = rproc->priv;
>  	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
>  	struct device *dev = priv->dev;
> +	struct arm_smccc_res res;
>  	int ret;
>  
> -	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> -				 dcfg->src_mask, dcfg->src_start);
> +	switch (dcfg->method) {
> +	case IMX_RPROC_MMIO:
> +		ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
> +					 dcfg->src_start);
> +		break;
> +	case IMX_RPROC_SMC:
> +		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_START, 0, 0, 0, 0, 0, 0, &res);
> +		ret = res.a0;
> +		break;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +
>  	if (ret)
> -		dev_err(dev, "Failed to enable M4!\n");
> +		dev_err(dev, "Failed to enable remote cores!\n");
>  
>  	return ret;
>  }
> @@ -261,12 +315,26 @@ static int imx_rproc_stop(struct rproc *rproc)
>  	struct imx_rproc *priv = rproc->priv;
>  	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
>  	struct device *dev = priv->dev;
> +	struct arm_smccc_res res;
>  	int ret;
>  
> -	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> -				 dcfg->src_mask, dcfg->src_stop);
> +	switch (dcfg->method) {
> +	case IMX_RPROC_MMIO:
> +		ret = regmap_update_bits(priv->regmap, dcfg->src_reg, dcfg->src_mask,
> +					 dcfg->src_stop);
> +		break;
> +	case IMX_RPROC_SMC:
> +		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STOP, 0, 0, 0, 0, 0, 0, &res);
> +		ret = res.a0;
> +		if (res.a1)
> +			dev_info(dev, "Not in wfi, force stopped\n");
> +		break;
> +	default:
> +		return -EOPNOTSUPP;
> +	}
> +
>  	if (ret)
> -		dev_err(dev, "Failed to stop M4!\n");
> +		dev_err(dev, "Failed to stop remote cores\n");
>  
>  	return ret;
>  }
> @@ -600,6 +668,7 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
>  {
>  	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
>  	struct device *dev = priv->dev;
> +	struct arm_smccc_res res;
>  	int ret;
>  	u32 val;
>  
> @@ -616,8 +685,12 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
>  			priv->mode = IMX_RPROC_EARLY_BOOT;
>  	}
>  
> -	if (dcfg->method == IMX_RPROC_NONE)
> +	if (dcfg->method == IMX_RPROC_NONE) {
>  		priv->mode = IMX_RPROC_EARLY_BOOT;
> +	} else if (dcfg->method == IMX_RPROC_SMC) {
> +		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STARTED, 0, 0, 0, 0, 0, 0, &res);
> +		priv->mode = res.a0 ? IMX_RPROC_EARLY_BOOT : IMX_RPROC_NORMAL;
> +	}

When all patches have been applied this function is really hard to read.  I
suggest using a switch() statement like you did in imx_rproc_start() and
imx_rproc_stop().

Thanks,
Mathieu

>  
>  	if (priv->mode == IMX_RPROC_EARLY_BOOT)
>  		priv->rproc->state = RPROC_DETACHED;
> @@ -747,6 +820,8 @@ static const struct of_device_id imx_rproc_of_match[] = {
>  	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
>  	{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
>  	{ .compatible = "fsl,imx8mm-cm4", .data = &imx_rproc_cfg_imx8mq },
> +	{ .compatible = "fsl,imx8mn-cm7", .data = &imx_rproc_cfg_imx8mn },
> +	{ .compatible = "fsl,imx8mp-cm7", .data = &imx_rproc_cfg_imx8mn },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
> -- 
> 2.30.0
> 

RE: [PATCH V3 8/8] remoteproc: imx_rproc: support i.MX8MN/P

[Peng Fan (OSS)]

> Subject: Re: [PATCH V3 8/8] remoteproc: imx_rproc: support i.MX8MN/P

Hi Mathieu,

Your all comments are good suggestion in the patchset, I not reply your
comment one by one for each patch. In V4 patchset, hope I have fixed
all the issues you pointed.

Thanks for your reviewing.

Thanks,
Peng.

> 
> On Thu, Apr 08, 2021 at 09:54:58AM +0800, peng.fan@oss.nxp.com wrote:
> > From: Peng Fan <peng.fan@nxp.com>
> >
> > Add i.MX8MN/P remote processor(Cortex-M7) support, we are using ARM
> > SMCCC to start/stop M core, not using regmap interface.
> >
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
> >  drivers/remoteproc/imx_rproc.c | 89
> > +++++++++++++++++++++++++++++++---
> >  1 file changed, 82 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/remoteproc/imx_rproc.c
> > b/drivers/remoteproc/imx_rproc.c index b911a7539897..9351626f09c0
> > 100644
> > --- a/drivers/remoteproc/imx_rproc.c
> > +++ b/drivers/remoteproc/imx_rproc.c
> > @@ -3,6 +3,7 @@
> >   * Copyright (c) 2017 Pengutronix, Oleksij Rempel
> <kernel@pengutronix.de>
> >   */
> >
> > +#include <linux/arm-smccc.h>
> >  #include <linux/clk.h>
> >  #include <linux/err.h>
> >  #include <linux/interrupt.h>
> > @@ -50,6 +51,11 @@
> >
> >  #define IMX_RPROC_MEM_MAX		32
> >
> > +#define IMX_SIP_RPROC			0xC2000005
> > +#define IMX_SIP_RPROC_START		0x00
> > +#define IMX_SIP_RPROC_STARTED		0x01
> > +#define IMX_SIP_RPROC_STOP		0x02
> > +
> >  /**
> >   * struct imx_rproc_mem - slim internal memory structure
> >   * @cpu_addr: MPU virtual address of the memory region @@ -119,6
> > +125,36 @@ struct imx_rproc {
> >  	enum imx_rproc_mode		mode;
> >  };
> >
> > +static const struct imx_rproc_att imx_rproc_att_imx8mn[] = {
> > +	/* dev addr , sys addr  , size	    , flags */
> > +	/* ITCM   */
> > +	{ 0x00000000, 0x007E0000, 0x00020000, ATT_OWN },
> > +	/* OCRAM_S */
> > +	{ 0x00180000, 0x00180000, 0x00009000, 0 },
> > +	/* OCRAM */
> > +	{ 0x00900000, 0x00900000, 0x00020000, 0 },
> > +	/* OCRAM */
> > +	{ 0x00920000, 0x00920000, 0x00020000, 0 },
> > +	/* OCRAM */
> > +	{ 0x00940000, 0x00940000, 0x00050000, 0 },
> > +	/* QSPI Code - alias */
> > +	{ 0x08000000, 0x08000000, 0x08000000, 0 },
> > +	/* DDR (Code) - alias */
> > +	{ 0x10000000, 0x40000000, 0x0FFE0000, 0 },
> > +	/* DTCM */
> > +	{ 0x20000000, 0x00800000, 0x00020000, ATT_OWN },
> > +	/* OCRAM_S - alias */
> > +	{ 0x20180000, 0x00180000, 0x00008000, ATT_OWN },
> > +	/* OCRAM */
> > +	{ 0x20200000, 0x00900000, 0x00020000, ATT_OWN },
> > +	/* OCRAM */
> > +	{ 0x20220000, 0x00920000, 0x00020000, ATT_OWN },
> > +	/* OCRAM */
> > +	{ 0x20240000, 0x00940000, 0x00040000, ATT_OWN },
> > +	/* DDR (Data) */
> > +	{ 0x40000000, 0x40000000, 0x80000000, 0 }, };
> > +
> >  static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
> >  	/* dev addr , sys addr  , size	    , flags */
> >  	/* TCML - alias */
> > @@ -205,6 +241,12 @@ static const struct imx_rproc_att
> imx_rproc_att_imx6sx[] = {
> >  	{ 0x80000000, 0x80000000, 0x60000000, 0 },  };
> >
> > +static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mn = {
> > +	.att		= imx_rproc_att_imx8mn,
> > +	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mn),
> > +	.method		= IMX_RPROC_SMC,
> > +};
> > +
> >  static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
> >  	.src_reg	= IMX7D_SRC_SCR,
> >  	.src_mask	= IMX7D_M4_RST_MASK,
> > @@ -246,12 +288,24 @@ static int imx_rproc_start(struct rproc *rproc)
> >  	struct imx_rproc *priv = rproc->priv;
> >  	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
> >  	struct device *dev = priv->dev;
> > +	struct arm_smccc_res res;
> >  	int ret;
> >
> > -	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> > -				 dcfg->src_mask, dcfg->src_start);
> > +	switch (dcfg->method) {
> > +	case IMX_RPROC_MMIO:
> > +		ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> dcfg->src_mask,
> > +					 dcfg->src_start);
> > +		break;
> > +	case IMX_RPROC_SMC:
> > +		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_START, 0, 0, 0,
> 0, 0, 0, &res);
> > +		ret = res.a0;
> > +		break;
> > +	default:
> > +		return -EOPNOTSUPP;
> > +	}
> > +
> >  	if (ret)
> > -		dev_err(dev, "Failed to enable M4!\n");
> > +		dev_err(dev, "Failed to enable remote cores!\n");
> >
> >  	return ret;
> >  }
> > @@ -261,12 +315,26 @@ static int imx_rproc_stop(struct rproc *rproc)
> >  	struct imx_rproc *priv = rproc->priv;
> >  	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
> >  	struct device *dev = priv->dev;
> > +	struct arm_smccc_res res;
> >  	int ret;
> >
> > -	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> > -				 dcfg->src_mask, dcfg->src_stop);
> > +	switch (dcfg->method) {
> > +	case IMX_RPROC_MMIO:
> > +		ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> dcfg->src_mask,
> > +					 dcfg->src_stop);
> > +		break;
> > +	case IMX_RPROC_SMC:
> > +		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STOP, 0, 0, 0, 0,
> 0, 0, &res);
> > +		ret = res.a0;
> > +		if (res.a1)
> > +			dev_info(dev, "Not in wfi, force stopped\n");
> > +		break;
> > +	default:
> > +		return -EOPNOTSUPP;
> > +	}
> > +
> >  	if (ret)
> > -		dev_err(dev, "Failed to stop M4!\n");
> > +		dev_err(dev, "Failed to stop remote cores\n");
> >
> >  	return ret;
> >  }
> > @@ -600,6 +668,7 @@ static int imx_rproc_detect_mode(struct imx_rproc
> > *priv)  {
> >  	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
> >  	struct device *dev = priv->dev;
> > +	struct arm_smccc_res res;
> >  	int ret;
> >  	u32 val;
> >
> > @@ -616,8 +685,12 @@ static int imx_rproc_detect_mode(struct
> imx_rproc *priv)
> >  			priv->mode = IMX_RPROC_EARLY_BOOT;
> >  	}
> >
> > -	if (dcfg->method == IMX_RPROC_NONE)
> > +	if (dcfg->method == IMX_RPROC_NONE) {
> >  		priv->mode = IMX_RPROC_EARLY_BOOT;
> > +	} else if (dcfg->method == IMX_RPROC_SMC) {
> > +		arm_smccc_smc(IMX_SIP_RPROC, IMX_SIP_RPROC_STARTED, 0, 0,
> 0, 0, 0, 0, &res);
> > +		priv->mode = res.a0 ? IMX_RPROC_EARLY_BOOT :
> IMX_RPROC_NORMAL;
> > +	}
> 
> When all patches have been applied this function is really hard to read.  I
> suggest using a switch() statement like you did in imx_rproc_start() and
> imx_rproc_stop().
> 
> Thanks,
> Mathieu
> 
> >
> >  	if (priv->mode == IMX_RPROC_EARLY_BOOT)
> >  		priv->rproc->state = RPROC_DETACHED; @@ -747,6 +820,8 @@
> static
> > const struct of_device_id imx_rproc_of_match[] = {
> >  	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
> >  	{ .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
> >  	{ .compatible = "fsl,imx8mm-cm4", .data = &imx_rproc_cfg_imx8mq },
> > +	{ .compatible = "fsl,imx8mn-cm7", .data = &imx_rproc_cfg_imx8mn },
> > +	{ .compatible = "fsl,imx8mp-cm7", .data = &imx_rproc_cfg_imx8mn },
> >  	{},
> >  };
> >  MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
> > --
> > 2.30.0
> >