diff mbox series

remoteproc: mediatek: Refactor single core check and fix retrocompatibility

Message ID 20230919092336.51007-1-angelogioacchino.delregno@collabora.com
State New
Headers
Series remoteproc: mediatek: Refactor single core check and fix retrocompatibility |

Commit Message

AngeloGioacchino Del Regno Sept. 19, 2023, 9:23 a.m. UTC 
  In older devicetrees we had the ChromeOS EC in a node called "cros-ec"
instead of the newer "cros-ec-rpmsg", but this driver is now checking
only for the latter, breaking compatibility with those.

Besides, we can check if the SCP is single or dual core by simply
walking through the children of the main SCP node and checking if
if there's more than one "mediatek,scp-core" compatible node.

Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/remoteproc/mtk_scp.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

Comments

Mathieu Poirier Sept. 20, 2023, 1:28 p.m. UTC | #1 
On Tue, Sep 19, 2023 at 11:23:36AM +0200, AngeloGioacchino Del Regno wrote:
> In older devicetrees we had the ChromeOS EC in a node called "cros-ec"
> instead of the newer "cros-ec-rpmsg", but this driver is now checking
> only for the latter, breaking compatibility with those.
> 
> Besides, we can check if the SCP is single or dual core by simply
> walking through the children of the main SCP node and checking if
> if there's more than one "mediatek,scp-core" compatible node.
> 
> Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  drivers/remoteproc/mtk_scp.c | 18 +++++++-----------
>  1 file changed, 7 insertions(+), 11 deletions(-)
> 

I find this patch to be the most appropriate to fix this problem.  Laura,
Chen-Yu and Tinghan, please test the patch and reply public with your Testeb-by
tags.

Thanks,
Mathieu

> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index ea227b566c54..a35409eda0cf 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -1144,29 +1144,25 @@ static int scp_add_multi_core(struct platform_device *pdev,
>  	return ret;
>  }
>  
> -static int scp_is_single_core(struct platform_device *pdev)
> +static bool scp_is_single_core(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct device_node *np = dev_of_node(dev);
>  	struct device_node *child;
> +	int num_cores = 0;
>  
> -	child = of_get_next_available_child(np, NULL);
> -	if (!child)
> -		return dev_err_probe(dev, -ENODEV, "No child node\n");
> +	for_each_child_of_node(np, child)
> +		if (of_device_is_compatible(child, "mediatek,scp-core"))
> +			num_cores++;
>  
> -	of_node_put(child);
> -	return of_node_name_eq(child, "cros-ec-rpmsg");
> +	return num_cores < 2;
>  }
>  
>  static int scp_cluster_init(struct platform_device *pdev, struct mtk_scp_of_cluster *scp_cluster)
>  {
>  	int ret;
>  
> -	ret = scp_is_single_core(pdev);
> -	if (ret < 0)
> -		return ret;
> -
> -	if (ret)
> +	if (scp_is_single_core(pdev))
>  		ret = scp_add_single_core(pdev, scp_cluster);
>  	else
>  		ret = scp_add_multi_core(pdev, scp_cluster);
> -- 
> 2.42.0
>
Laura Nao Sept. 20, 2023, 3:03 p.m. UTC | #2 
On 9/19/23 11:23, AngeloGioacchino Del Regno wrote:
> In older devicetrees we had the ChromeOS EC in a node called "cros-ec"
> instead of the newer "cros-ec-rpmsg", but this driver is now checking
> only for the latter, breaking compatibility with those.
> 
> Besides, we can check if the SCP is single or dual core by simply
> walking through the children of the main SCP node and checking if
> if there's more than one "mediatek,scp-core" compatible node.
> 
> Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>   drivers/remoteproc/mtk_scp.c | 18 +++++++-----------
>   1 file changed, 7 insertions(+), 11 deletions(-)
> 

Tested on asurada (spherion) and jacuzzi (juniper). The issue was detected by KernelCI, so:

Reported-by: "kernelci.org bot" <bot@kernelci.org>
Tested-by: Laura Nao <laura.nao@collabora.com>

Thanks!
Laura

> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index ea227b566c54..a35409eda0cf 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -1144,29 +1144,25 @@ static int scp_add_multi_core(struct platform_device *pdev,
>   	return ret;
>   }
>   
> -static int scp_is_single_core(struct platform_device *pdev)
> +static bool scp_is_single_core(struct platform_device *pdev)
>   {
>   	struct device *dev = &pdev->dev;
>   	struct device_node *np = dev_of_node(dev);
>   	struct device_node *child;
> +	int num_cores = 0;
>   
> -	child = of_get_next_available_child(np, NULL);
> -	if (!child)
> -		return dev_err_probe(dev, -ENODEV, "No child node\n");
> +	for_each_child_of_node(np, child)
> +		if (of_device_is_compatible(child, "mediatek,scp-core"))
> +			num_cores++;
>   
> -	of_node_put(child);
> -	return of_node_name_eq(child, "cros-ec-rpmsg");
> +	return num_cores < 2;
>   }
>   
>   static int scp_cluster_init(struct platform_device *pdev, struct mtk_scp_of_cluster *scp_cluster)
>   {
>   	int ret;
>   
> -	ret = scp_is_single_core(pdev);
> -	if (ret < 0)
> -		return ret;
> -
> -	if (ret)
> +	if (scp_is_single_core(pdev))
>   		ret = scp_add_single_core(pdev, scp_cluster);
>   	else
>   		ret = scp_add_multi_core(pdev, scp_cluster);
Chen-Yu Tsai Sept. 21, 2023, 4:09 a.m. UTC | #3 
On Wed, Sep 20, 2023 at 11:03 PM Laura Nao <laura.nao@collabora.com> wrote:
>
> On 9/19/23 11:23, AngeloGioacchino Del Regno wrote:
> > In older devicetrees we had the ChromeOS EC in a node called "cros-ec"
> > instead of the newer "cros-ec-rpmsg", but this driver is now checking
> > only for the latter, breaking compatibility with those.
> >
> > Besides, we can check if the SCP is single or dual core by simply
> > walking through the children of the main SCP node and checking if
> > if there's more than one "mediatek,scp-core" compatible node.
> >
> > Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
> > Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > ---
> >   drivers/remoteproc/mtk_scp.c | 18 +++++++-----------
> >   1 file changed, 7 insertions(+), 11 deletions(-)
> >
>
> Tested on asurada (spherion) and jacuzzi (juniper). The issue was detected by KernelCI, so:
>
> Reported-by: "kernelci.org bot" <bot@kernelci.org>
> Tested-by: Laura Nao <laura.nao@collabora.com>

Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>

on Hayato (MT8192) and Juniper (MT8183).
AngeloGioacchino Del Regno Sept. 21, 2023, 7:17 a.m. UTC | #4 
Il 20/09/23 17:03, Laura Nao ha scritto:
> On 9/19/23 11:23, AngeloGioacchino Del Regno wrote:
>> In older devicetrees we had the ChromeOS EC in a node called "cros-ec"
>> instead of the newer "cros-ec-rpmsg", but this driver is now checking
>> only for the latter, breaking compatibility with those.
>>
>> Besides, we can check if the SCP is single or dual core by simply
>> walking through the children of the main SCP node and checking if
>> if there's more than one "mediatek,scp-core" compatible node.
>>
>> Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
>> ---
>>    drivers/remoteproc/mtk_scp.c | 18 +++++++-----------
>>    1 file changed, 7 insertions(+), 11 deletions(-)
>>
> 
> Tested on asurada (spherion) and jacuzzi (juniper). The issue was detected by KernelCI, so:
> 
> Reported-by: "kernelci.org bot" <bot@kernelci.org>
> Tested-by: Laura Nao <laura.nao@collabora.com>
> 

Thanks for pointing out the correct Reported-by tag! :-)

Cheers,
Angelo
Mathieu Poirier Sept. 21, 2023, 12:51 p.m. UTC | #5 
On Tue, Sep 19, 2023 at 11:23:36AM +0200, AngeloGioacchino Del Regno wrote:
> In older devicetrees we had the ChromeOS EC in a node called "cros-ec"
> instead of the newer "cros-ec-rpmsg", but this driver is now checking
> only for the latter, breaking compatibility with those.
> 
> Besides, we can check if the SCP is single or dual core by simply
> walking through the children of the main SCP node and checking if
> if there's more than one "mediatek,scp-core" compatible node.
> 
> Fixes: 1fdbf0cdde98 ("remoteproc: mediatek: Probe SCP cluster on multi-core SCP")
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  drivers/remoteproc/mtk_scp.c | 18 +++++++-----------
>  1 file changed, 7 insertions(+), 11 deletions(-)
>

Applied.

Thanks,
Mathieu

> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index ea227b566c54..a35409eda0cf 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -1144,29 +1144,25 @@ static int scp_add_multi_core(struct platform_device *pdev,
>  	return ret;
>  }
>  
> -static int scp_is_single_core(struct platform_device *pdev)
> +static bool scp_is_single_core(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct device_node *np = dev_of_node(dev);
>  	struct device_node *child;
> +	int num_cores = 0;
>  
> -	child = of_get_next_available_child(np, NULL);
> -	if (!child)
> -		return dev_err_probe(dev, -ENODEV, "No child node\n");
> +	for_each_child_of_node(np, child)
> +		if (of_device_is_compatible(child, "mediatek,scp-core"))
> +			num_cores++;
>  
> -	of_node_put(child);
> -	return of_node_name_eq(child, "cros-ec-rpmsg");
> +	return num_cores < 2;
>  }
>  
>  static int scp_cluster_init(struct platform_device *pdev, struct mtk_scp_of_cluster *scp_cluster)
>  {
>  	int ret;
>  
> -	ret = scp_is_single_core(pdev);
> -	if (ret < 0)
> -		return ret;
> -
> -	if (ret)
> +	if (scp_is_single_core(pdev))
>  		ret = scp_add_single_core(pdev, scp_cluster);
>  	else
>  		ret = scp_add_multi_core(pdev, scp_cluster);
> -- 
> 2.42.0
>
diff mbox series

Patch

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index ea227b566c54..a35409eda0cf 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -1144,29 +1144,25 @@  static int scp_add_multi_core(struct platform_device *pdev,
 	return ret;
 }
 
-static int scp_is_single_core(struct platform_device *pdev)
+static bool scp_is_single_core(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev_of_node(dev);
 	struct device_node *child;
+	int num_cores = 0;
 
-	child = of_get_next_available_child(np, NULL);
-	if (!child)
-		return dev_err_probe(dev, -ENODEV, "No child node\n");
+	for_each_child_of_node(np, child)
+		if (of_device_is_compatible(child, "mediatek,scp-core"))
+			num_cores++;
 
-	of_node_put(child);
-	return of_node_name_eq(child, "cros-ec-rpmsg");
+	return num_cores < 2;
 }
 
 static int scp_cluster_init(struct platform_device *pdev, struct mtk_scp_of_cluster *scp_cluster)
 {
 	int ret;
 
-	ret = scp_is_single_core(pdev);
-	if (ret < 0)
-		return ret;
-
-	if (ret)
+	if (scp_is_single_core(pdev))
 		ret = scp_add_single_core(pdev, scp_cluster);
 	else
 		ret = scp_add_multi_core(pdev, scp_cluster);