[PATCH v3 0/2] Fix the rkisp1 userspace API for later IP versions

[PATCH v3 0/2] Fix the rkisp1 userspace API for later IP versions

[Heiko Stuebner]

This NEEDs to go into 5.11 while we can still adapt the uapi
during its RC-cycle.


When looking into supporting the rkisp1 of the px30 I noticed that
some fields got bigger in the uapi, caused by bigger number of samples
for example for histograms or gamma values.

The rkisp1 was destaged with 5.11-rc1 so we have still time during
the 5.11 cycle to fix that without big hassles.

This was discussed previously in a mail [0] and a rfc series [1]
and this two-part series now splits out the important parts that
really should become part of a 5.11-rc and thus the final 5.11.

changes since v2:
- actually zero the correct sizes for u16 values (hist-bins)
  (kernel-test-robot)

changes since v1:
- drop duplicate isp_ver storage, hw_revision is enough (Dafna)
- document multiple maximum sizes in uapi (Hans)
- document usage of hw_revision field (Hans)
- zero fields transmitted to userspace before adding data (Hans)
- use _V10 field sizes when filling fields, as there is only v10 for now

changes since rfc:
- move rkisp1_version enum into uapo
- show version in media-api hw_revision
- introduce constants for versions and make max use the biggest

Heiko Stuebner (2):
  media: rockchip: rkisp1: carry ip version information
  media: rockchip: rkisp1: extend uapi array sizes

 Documentation/admin-guide/media/rkisp1.rst    | 15 +++++++
 .../platform/rockchip/rkisp1/rkisp1-dev.c     | 21 +++++----
 .../platform/rockchip/rkisp1/rkisp1-params.c  |  2 +-
 .../platform/rockchip/rkisp1/rkisp1-stats.c   | 12 +++++-
 include/uapi/linux/rkisp1-config.h            | 43 ++++++++++++++++---
 5 files changed, 76 insertions(+), 17 deletions(-)

-- 
2.29.2


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[PATCH v3 1/2] media: rockchip: rkisp1: carry ip version information

[Heiko Stuebner]

From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

The IP block evolved from its rk3288/rk3399 base and the vendor
designates them with a numerical version. rk3399 for example
is designated V10 probably meaning V1.0.

There doesn't seem to be an actual version register we could read that
information from, so allow the match_data to carry that information
for future differentiation.

Also carry that information in the hw_revision field of the media-
controller API, so that userspace also has access to that.

The added versions are:
- V10: at least rk3288 + rk3399
- V11: seemingly unused as of now, but probably appeared in some soc
- V12: at least rk3326 + px30
- V13: at least rk1808

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
---
 Documentation/admin-guide/media/rkisp1.rst    | 15 +++++++++++++
 .../platform/rockchip/rkisp1/rkisp1-dev.c     | 21 +++++++++++--------
 include/uapi/linux/rkisp1-config.h            |  7 +++++++
 3 files changed, 34 insertions(+), 9 deletions(-)

diff --git a/Documentation/admin-guide/media/rkisp1.rst b/Documentation/admin-guide/media/rkisp1.rst
index 2267e4fb475e..e960678f47ca 100644
--- a/Documentation/admin-guide/media/rkisp1.rst
+++ b/Documentation/admin-guide/media/rkisp1.rst
@@ -13,6 +13,21 @@ This file documents the driver for the Rockchip ISP1 that is part of RK3288
 and RK3399 SoCs. The driver is located under drivers/staging/media/rkisp1
 and uses the Media-Controller API.
 
+Revisions
+=========
+
+There exist multiple smaller revisions to this ISP that got introduced in
+later SoCs. Revisions in use are documented in enum rkisp1_cif_isp_version
+in the UAPI and the revision of the ISP inside the running SoC can be read
+in the field hw_revision of struct media_device.
+
+Versions in use are:
+
+- RKISP1_V10: used at least in rk3288 and rk3399
+- RKISP1_V11: declared in the original vendor code, but not used
+- RKISP1_V12: used at least in rk3326 and px30
+- RKISP1_V13: used at least in rk1808
+
 Topology
 ========
 .. _rkisp1_topology_graph:
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index 68da1eed753d..f7e9fd305548 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -104,6 +104,7 @@
 struct rkisp1_match_data {
 	const char * const *clks;
 	unsigned int size;
+	enum rkisp1_cif_isp_version isp_ver;
 };
 
 /* ----------------------------------------------------------------------------
@@ -411,15 +412,16 @@ static const char * const rk3399_isp_clks[] = {
 	"hclk",
 };
 
-static const struct rkisp1_match_data rk3399_isp_clk_data = {
+static const struct rkisp1_match_data rk3399_isp_match_data = {
 	.clks = rk3399_isp_clks,
 	.size = ARRAY_SIZE(rk3399_isp_clks),
+	.isp_ver = RKISP1_V10,
 };
 
 static const struct of_device_id rkisp1_of_match[] = {
 	{
 		.compatible = "rockchip,rk3399-cif-isp",
-		.data = &rk3399_isp_clk_data,
+		.data = &rk3399_isp_match_data,
 	},
 	{},
 };
@@ -457,15 +459,15 @@ static void rkisp1_debug_init(struct rkisp1_device *rkisp1)
 
 static int rkisp1_probe(struct platform_device *pdev)
 {
-	const struct rkisp1_match_data *clk_data;
+	const struct rkisp1_match_data *match_data;
 	struct device *dev = &pdev->dev;
 	struct rkisp1_device *rkisp1;
 	struct v4l2_device *v4l2_dev;
 	unsigned int i;
 	int ret, irq;
 
-	clk_data = of_device_get_match_data(&pdev->dev);
-	if (!clk_data)
+	match_data = of_device_get_match_data(&pdev->dev);
+	if (!match_data)
 		return -ENODEV;
 
 	rkisp1 = devm_kzalloc(dev, sizeof(*rkisp1), GFP_KERNEL);
@@ -494,15 +496,16 @@ static int rkisp1_probe(struct platform_device *pdev)
 
 	rkisp1->irq = irq;
 
-	for (i = 0; i < clk_data->size; i++)
-		rkisp1->clks[i].id = clk_data->clks[i];
-	ret = devm_clk_bulk_get(dev, clk_data->size, rkisp1->clks);
+	for (i = 0; i < match_data->size; i++)
+		rkisp1->clks[i].id = match_data->clks[i];
+	ret = devm_clk_bulk_get(dev, match_data->size, rkisp1->clks);
 	if (ret)
 		return ret;
-	rkisp1->clk_size = clk_data->size;
+	rkisp1->clk_size = match_data->size;
 
 	pm_runtime_enable(&pdev->dev);
 
+	rkisp1->media_dev.hw_revision = match_data->isp_ver;
 	strscpy(rkisp1->media_dev.model, RKISP1_DRIVER_NAME,
 		sizeof(rkisp1->media_dev.model));
 	rkisp1->media_dev.dev = &pdev->dev;
diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
index 6e449e784260..bad46aadf838 100644
--- a/include/uapi/linux/rkisp1-config.h
+++ b/include/uapi/linux/rkisp1-config.h
@@ -124,6 +124,13 @@
 #define RKISP1_CIF_ISP_STAT_AFM           (1U << 2)
 #define RKISP1_CIF_ISP_STAT_HIST          (1U << 3)
 
+enum rkisp1_cif_isp_version {
+	RKISP1_V10 = 0,
+	RKISP1_V11,
+	RKISP1_V12,
+	RKISP1_V13,
+};
+
 enum rkisp1_cif_isp_histogram_mode {
 	RKISP1_CIF_ISP_HISTOGRAM_MODE_DISABLE,
 	RKISP1_CIF_ISP_HISTOGRAM_MODE_RGB_COMBINED,
-- 
2.29.2


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Re: [PATCH v3 1/2] media: rockchip: rkisp1: carry ip version information

[Ezequiel Garcia]

Hi Heiko,

Thanks a lot for pushing this.

On Fri, 2021-01-15 at 12:23 +0100, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> The IP block evolved from its rk3288/rk3399 base and the vendor
> designates them with a numerical version. rk3399 for example
> is designated V10 probably meaning V1.0.
> 
> There doesn't seem to be an actual version register we could read that
> information from, so allow the match_data to carry that information
> for future differentiation.
> 
> Also carry that information in the hw_revision field of the media-
> controller API, so that userspace also has access to that.
> 
> The added versions are:
> - V10: at least rk3288 + rk3399
> - V11: seemingly unused as of now, but probably appeared in some soc
> - V12: at least rk3326 + px30
> - V13: at least rk1808
> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>

Regards,
Ezequiel


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Re: [PATCH v3 1/2] media: rockchip: rkisp1: carry ip version information

[Dafna Hirschfeld]

Am 15.01.21 um 12:23 schrieb Heiko Stuebner:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> The IP block evolved from its rk3288/rk3399 base and the vendor
> designates them with a numerical version. rk3399 for example
> is designated V10 probably meaning V1.0.
> 
> There doesn't seem to be an actual version register we could read that
> information from, so allow the match_data to carry that information
> for future differentiation.
> 
> Also carry that information in the hw_revision field of the media-
> controller API, so that userspace also has access to that.
> 
> The added versions are:
> - V10: at least rk3288 + rk3399
> - V11: seemingly unused as of now, but probably appeared in some soc
> - V12: at least rk3326 + px30
> - V13: at least rk1808
> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>

> ---
>   Documentation/admin-guide/media/rkisp1.rst    | 15 +++++++++++++
>   .../platform/rockchip/rkisp1/rkisp1-dev.c     | 21 +++++++++++--------
>   include/uapi/linux/rkisp1-config.h            |  7 +++++++
>   3 files changed, 34 insertions(+), 9 deletions(-)
> 
> diff --git a/Documentation/admin-guide/media/rkisp1.rst b/Documentation/admin-guide/media/rkisp1.rst
> index 2267e4fb475e..e960678f47ca 100644
> --- a/Documentation/admin-guide/media/rkisp1.rst
> +++ b/Documentation/admin-guide/media/rkisp1.rst
> @@ -13,6 +13,21 @@ This file documents the driver for the Rockchip ISP1 that is part of RK3288
>   and RK3399 SoCs. The driver is located under drivers/staging/media/rkisp1
>   and uses the Media-Controller API.
>   
> +Revisions
> +=========
> +
> +There exist multiple smaller revisions to this ISP that got introduced in
> +later SoCs. Revisions in use are documented in enum rkisp1_cif_isp_version
> +in the UAPI and the revision of the ISP inside the running SoC can be read
> +in the field hw_revision of struct media_device.
> +
> +Versions in use are:
> +
> +- RKISP1_V10: used at least in rk3288 and rk3399
> +- RKISP1_V11: declared in the original vendor code, but not used
> +- RKISP1_V12: used at least in rk3326 and px30
> +- RKISP1_V13: used at least in rk1808
> +
>   Topology
>   ========
>   .. _rkisp1_topology_graph:
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> index 68da1eed753d..f7e9fd305548 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> @@ -104,6 +104,7 @@
>   struct rkisp1_match_data {
>   	const char * const *clks;
>   	unsigned int size;
> +	enum rkisp1_cif_isp_version isp_ver;
>   };
>   
>   /* ----------------------------------------------------------------------------
> @@ -411,15 +412,16 @@ static const char * const rk3399_isp_clks[] = {
>   	"hclk",
>   };
>   
> -static const struct rkisp1_match_data rk3399_isp_clk_data = {
> +static const struct rkisp1_match_data rk3399_isp_match_data = {
>   	.clks = rk3399_isp_clks,
>   	.size = ARRAY_SIZE(rk3399_isp_clks),
> +	.isp_ver = RKISP1_V10,
>   };
>   
>   static const struct of_device_id rkisp1_of_match[] = {
>   	{
>   		.compatible = "rockchip,rk3399-cif-isp",
> -		.data = &rk3399_isp_clk_data,
> +		.data = &rk3399_isp_match_data,
>   	},
>   	{},
>   };
> @@ -457,15 +459,15 @@ static void rkisp1_debug_init(struct rkisp1_device *rkisp1)
>   
>   static int rkisp1_probe(struct platform_device *pdev)
>   {
> -	const struct rkisp1_match_data *clk_data;
> +	const struct rkisp1_match_data *match_data;
>   	struct device *dev = &pdev->dev;
>   	struct rkisp1_device *rkisp1;
>   	struct v4l2_device *v4l2_dev;
>   	unsigned int i;
>   	int ret, irq;
>   
> -	clk_data = of_device_get_match_data(&pdev->dev);
> -	if (!clk_data)
> +	match_data = of_device_get_match_data(&pdev->dev);
> +	if (!match_data)
>   		return -ENODEV;
>   
>   	rkisp1 = devm_kzalloc(dev, sizeof(*rkisp1), GFP_KERNEL);
> @@ -494,15 +496,16 @@ static int rkisp1_probe(struct platform_device *pdev)
>   
>   	rkisp1->irq = irq;
>   
> -	for (i = 0; i < clk_data->size; i++)
> -		rkisp1->clks[i].id = clk_data->clks[i];
> -	ret = devm_clk_bulk_get(dev, clk_data->size, rkisp1->clks);
> +	for (i = 0; i < match_data->size; i++)
> +		rkisp1->clks[i].id = match_data->clks[i];
> +	ret = devm_clk_bulk_get(dev, match_data->size, rkisp1->clks);
>   	if (ret)
>   		return ret;
> -	rkisp1->clk_size = clk_data->size;
> +	rkisp1->clk_size = match_data->size;
>   
>   	pm_runtime_enable(&pdev->dev);
>   
> +	rkisp1->media_dev.hw_revision = match_data->isp_ver;
>   	strscpy(rkisp1->media_dev.model, RKISP1_DRIVER_NAME,
>   		sizeof(rkisp1->media_dev.model));
>   	rkisp1->media_dev.dev = &pdev->dev;
> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
> index 6e449e784260..bad46aadf838 100644
> --- a/include/uapi/linux/rkisp1-config.h
> +++ b/include/uapi/linux/rkisp1-config.h
> @@ -124,6 +124,13 @@
>   #define RKISP1_CIF_ISP_STAT_AFM           (1U << 2)
>   #define RKISP1_CIF_ISP_STAT_HIST          (1U << 3)
>   
> +enum rkisp1_cif_isp_version {
> +	RKISP1_V10 = 0,
> +	RKISP1_V11,
> +	RKISP1_V12,
> +	RKISP1_V13,
> +};
> +
>   enum rkisp1_cif_isp_histogram_mode {
>   	RKISP1_CIF_ISP_HISTOGRAM_MODE_DISABLE,
>   	RKISP1_CIF_ISP_HISTOGRAM_MODE_RGB_COMBINED,
> 

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Re: [PATCH v3 1/2] media: rockchip: rkisp1: carry ip version information

[Hans Verkuil]

On 15/01/2021 12:23, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> The IP block evolved from its rk3288/rk3399 base and the vendor
> designates them with a numerical version. rk3399 for example
> is designated V10 probably meaning V1.0.
> 
> There doesn't seem to be an actual version register we could read that
> information from, so allow the match_data to carry that information
> for future differentiation.
> 
> Also carry that information in the hw_revision field of the media-
> controller API, so that userspace also has access to that.
> 
> The added versions are:
> - V10: at least rk3288 + rk3399
> - V11: seemingly unused as of now, but probably appeared in some soc
> - V12: at least rk3326 + px30
> - V13: at least rk1808
> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> ---
>  Documentation/admin-guide/media/rkisp1.rst    | 15 +++++++++++++
>  .../platform/rockchip/rkisp1/rkisp1-dev.c     | 21 +++++++++++--------
>  include/uapi/linux/rkisp1-config.h            |  7 +++++++
>  3 files changed, 34 insertions(+), 9 deletions(-)
> 
> diff --git a/Documentation/admin-guide/media/rkisp1.rst b/Documentation/admin-guide/media/rkisp1.rst
> index 2267e4fb475e..e960678f47ca 100644
> --- a/Documentation/admin-guide/media/rkisp1.rst
> +++ b/Documentation/admin-guide/media/rkisp1.rst
> @@ -13,6 +13,21 @@ This file documents the driver for the Rockchip ISP1 that is part of RK3288
>  and RK3399 SoCs. The driver is located under drivers/staging/media/rkisp1
>  and uses the Media-Controller API.
>  
> +Revisions
> +=========
> +
> +There exist multiple smaller revisions to this ISP that got introduced in
> +later SoCs. Revisions in use are documented in enum rkisp1_cif_isp_version
> +in the UAPI and the revision of the ISP inside the running SoC can be read
> +in the field hw_revision of struct media_device.

No, struct media_device is internal to the kernel, userspace doesn't see this
struct.

Replace this by:

"...struct media_device_info as returned by ioctl MEDIA_IOC_DEVICE_INFO."

Regards,

	Hans

> +
> +Versions in use are:
> +
> +- RKISP1_V10: used at least in rk3288 and rk3399
> +- RKISP1_V11: declared in the original vendor code, but not used
> +- RKISP1_V12: used at least in rk3326 and px30
> +- RKISP1_V13: used at least in rk1808
> +
>  Topology
>  ========
>  .. _rkisp1_topology_graph:
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> index 68da1eed753d..f7e9fd305548 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
> @@ -104,6 +104,7 @@
>  struct rkisp1_match_data {
>  	const char * const *clks;
>  	unsigned int size;
> +	enum rkisp1_cif_isp_version isp_ver;
>  };
>  
>  /* ----------------------------------------------------------------------------
> @@ -411,15 +412,16 @@ static const char * const rk3399_isp_clks[] = {
>  	"hclk",
>  };
>  
> -static const struct rkisp1_match_data rk3399_isp_clk_data = {
> +static const struct rkisp1_match_data rk3399_isp_match_data = {
>  	.clks = rk3399_isp_clks,
>  	.size = ARRAY_SIZE(rk3399_isp_clks),
> +	.isp_ver = RKISP1_V10,
>  };
>  
>  static const struct of_device_id rkisp1_of_match[] = {
>  	{
>  		.compatible = "rockchip,rk3399-cif-isp",
> -		.data = &rk3399_isp_clk_data,
> +		.data = &rk3399_isp_match_data,
>  	},
>  	{},
>  };
> @@ -457,15 +459,15 @@ static void rkisp1_debug_init(struct rkisp1_device *rkisp1)
>  
>  static int rkisp1_probe(struct platform_device *pdev)
>  {
> -	const struct rkisp1_match_data *clk_data;
> +	const struct rkisp1_match_data *match_data;
>  	struct device *dev = &pdev->dev;
>  	struct rkisp1_device *rkisp1;
>  	struct v4l2_device *v4l2_dev;
>  	unsigned int i;
>  	int ret, irq;
>  
> -	clk_data = of_device_get_match_data(&pdev->dev);
> -	if (!clk_data)
> +	match_data = of_device_get_match_data(&pdev->dev);
> +	if (!match_data)
>  		return -ENODEV;
>  
>  	rkisp1 = devm_kzalloc(dev, sizeof(*rkisp1), GFP_KERNEL);
> @@ -494,15 +496,16 @@ static int rkisp1_probe(struct platform_device *pdev)
>  
>  	rkisp1->irq = irq;
>  
> -	for (i = 0; i < clk_data->size; i++)
> -		rkisp1->clks[i].id = clk_data->clks[i];
> -	ret = devm_clk_bulk_get(dev, clk_data->size, rkisp1->clks);
> +	for (i = 0; i < match_data->size; i++)
> +		rkisp1->clks[i].id = match_data->clks[i];
> +	ret = devm_clk_bulk_get(dev, match_data->size, rkisp1->clks);
>  	if (ret)
>  		return ret;
> -	rkisp1->clk_size = clk_data->size;
> +	rkisp1->clk_size = match_data->size;
>  
>  	pm_runtime_enable(&pdev->dev);
>  
> +	rkisp1->media_dev.hw_revision = match_data->isp_ver;
>  	strscpy(rkisp1->media_dev.model, RKISP1_DRIVER_NAME,
>  		sizeof(rkisp1->media_dev.model));
>  	rkisp1->media_dev.dev = &pdev->dev;
> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
> index 6e449e784260..bad46aadf838 100644
> --- a/include/uapi/linux/rkisp1-config.h
> +++ b/include/uapi/linux/rkisp1-config.h
> @@ -124,6 +124,13 @@
>  #define RKISP1_CIF_ISP_STAT_AFM           (1U << 2)
>  #define RKISP1_CIF_ISP_STAT_HIST          (1U << 3)
>  
> +enum rkisp1_cif_isp_version {
> +	RKISP1_V10 = 0,
> +	RKISP1_V11,
> +	RKISP1_V12,
> +	RKISP1_V13,
> +};
> +
>  enum rkisp1_cif_isp_histogram_mode {
>  	RKISP1_CIF_ISP_HISTOGRAM_MODE_DISABLE,
>  	RKISP1_CIF_ISP_HISTOGRAM_MODE_RGB_COMBINED,
> 


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Re: [PATCH v3 1/2] media: rockchip: rkisp1: carry ip version information

[Dafna Hirschfeld]

Am 15.01.21 um 15:02 schrieb Hans Verkuil:
> On 15/01/2021 12:23, Heiko Stuebner wrote:
>> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
>>
>> The IP block evolved from its rk3288/rk3399 base and the vendor
>> designates them with a numerical version. rk3399 for example
>> is designated V10 probably meaning V1.0.
>>
>> There doesn't seem to be an actual version register we could read that
>> information from, so allow the match_data to carry that information
>> for future differentiation.
>>
>> Also carry that information in the hw_revision field of the media-
>> controller API, so that userspace also has access to that.
>>
>> The added versions are:
>> - V10: at least rk3288 + rk3399
>> - V11: seemingly unused as of now, but probably appeared in some soc
>> - V12: at least rk3326 + px30
>> - V13: at least rk1808
>>
>> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
>> ---
>>   Documentation/admin-guide/media/rkisp1.rst    | 15 +++++++++++++
>>   .../platform/rockchip/rkisp1/rkisp1-dev.c     | 21 +++++++++++--------
>>   include/uapi/linux/rkisp1-config.h            |  7 +++++++
>>   3 files changed, 34 insertions(+), 9 deletions(-)
>>
>> diff --git a/Documentation/admin-guide/media/rkisp1.rst b/Documentation/admin-guide/media/rkisp1.rst
>> index 2267e4fb475e..e960678f47ca 100644
>> --- a/Documentation/admin-guide/media/rkisp1.rst
>> +++ b/Documentation/admin-guide/media/rkisp1.rst
>> @@ -13,6 +13,21 @@ This file documents the driver for the Rockchip ISP1 that is part of RK3288
>>   and RK3399 SoCs. The driver is located under drivers/staging/media/rkisp1
>>   and uses the Media-Controller API.
>>   
>> +Revisions
>> +=========
>> +
>> +There exist multiple smaller revisions to this ISP that got introduced in
>> +later SoCs. Revisions in use are documented in enum rkisp1_cif_isp_version

Hi,
since you send v4 anyway..
You can format "enum rkisp1_cif_isp_version" to "enum :c:type:`rkisp1_cif_isp_version`"
But you actually document the revision here in this file and not "in enum rkisp1_cif_isp_version"
Maybe it is actually better to document them inline (just above the enum decleration)

Thanks,
Dafna

>> +in the UAPI and the revision of the ISP inside the running SoC can be read
>> +in the field hw_revision of struct media_device.
> 
> No, struct media_device is internal to the kernel, userspace doesn't see this
> struct.
> 
> Replace this by:
> 
> "...struct media_device_info as returned by ioctl MEDIA_IOC_DEVICE_INFO."
> 
> Regards,
> 
> 	Hans
> 
>> +
>> +Versions in use are:
>> +
>> +- RKISP1_V10: used at least in rk3288 and rk3399
>> +- RKISP1_V11: declared in the original vendor code, but not used
>> +- RKISP1_V12: used at least in rk3326 and px30
>> +- RKISP1_V13: used at least in rk1808
>> +
>>   Topology
>>   ========
>>   .. _rkisp1_topology_graph:
>> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
>> index 68da1eed753d..f7e9fd305548 100644
>> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
>> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
>> @@ -104,6 +104,7 @@
>>   struct rkisp1_match_data {
>>   	const char * const *clks;
>>   	unsigned int size;
>> +	enum rkisp1_cif_isp_version isp_ver;
>>   };
>>   
>>   /* ----------------------------------------------------------------------------
>> @@ -411,15 +412,16 @@ static const char * const rk3399_isp_clks[] = {
>>   	"hclk",
>>   };
>>   
>> -static const struct rkisp1_match_data rk3399_isp_clk_data = {
>> +static const struct rkisp1_match_data rk3399_isp_match_data = {
>>   	.clks = rk3399_isp_clks,
>>   	.size = ARRAY_SIZE(rk3399_isp_clks),
>> +	.isp_ver = RKISP1_V10,
>>   };
>>   
>>   static const struct of_device_id rkisp1_of_match[] = {
>>   	{
>>   		.compatible = "rockchip,rk3399-cif-isp",
>> -		.data = &rk3399_isp_clk_data,
>> +		.data = &rk3399_isp_match_data,
>>   	},
>>   	{},
>>   };
>> @@ -457,15 +459,15 @@ static void rkisp1_debug_init(struct rkisp1_device *rkisp1)
>>   
>>   static int rkisp1_probe(struct platform_device *pdev)
>>   {
>> -	const struct rkisp1_match_data *clk_data;
>> +	const struct rkisp1_match_data *match_data;
>>   	struct device *dev = &pdev->dev;
>>   	struct rkisp1_device *rkisp1;
>>   	struct v4l2_device *v4l2_dev;
>>   	unsigned int i;
>>   	int ret, irq;
>>   
>> -	clk_data = of_device_get_match_data(&pdev->dev);
>> -	if (!clk_data)
>> +	match_data = of_device_get_match_data(&pdev->dev);
>> +	if (!match_data)
>>   		return -ENODEV;
>>   
>>   	rkisp1 = devm_kzalloc(dev, sizeof(*rkisp1), GFP_KERNEL);
>> @@ -494,15 +496,16 @@ static int rkisp1_probe(struct platform_device *pdev)
>>   
>>   	rkisp1->irq = irq;
>>   
>> -	for (i = 0; i < clk_data->size; i++)
>> -		rkisp1->clks[i].id = clk_data->clks[i];
>> -	ret = devm_clk_bulk_get(dev, clk_data->size, rkisp1->clks);
>> +	for (i = 0; i < match_data->size; i++)
>> +		rkisp1->clks[i].id = match_data->clks[i];
>> +	ret = devm_clk_bulk_get(dev, match_data->size, rkisp1->clks);
>>   	if (ret)
>>   		return ret;
>> -	rkisp1->clk_size = clk_data->size;
>> +	rkisp1->clk_size = match_data->size;
>>   
>>   	pm_runtime_enable(&pdev->dev);
>>   
>> +	rkisp1->media_dev.hw_revision = match_data->isp_ver;
>>   	strscpy(rkisp1->media_dev.model, RKISP1_DRIVER_NAME,
>>   		sizeof(rkisp1->media_dev.model));
>>   	rkisp1->media_dev.dev = &pdev->dev;
>> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
>> index 6e449e784260..bad46aadf838 100644
>> --- a/include/uapi/linux/rkisp1-config.h
>> +++ b/include/uapi/linux/rkisp1-config.h
>> @@ -124,6 +124,13 @@
>>   #define RKISP1_CIF_ISP_STAT_AFM           (1U << 2)
>>   #define RKISP1_CIF_ISP_STAT_HIST          (1U << 3)
>>   
>> +enum rkisp1_cif_isp_version {
>> +	RKISP1_V10 = 0,
>> +	RKISP1_V11,
>> +	RKISP1_V12,
>> +	RKISP1_V13,
>> +};
>> +
>>   enum rkisp1_cif_isp_histogram_mode {
>>   	RKISP1_CIF_ISP_HISTOGRAM_MODE_DISABLE,
>>   	RKISP1_CIF_ISP_HISTOGRAM_MODE_RGB_COMBINED,
>>
> 

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[PATCH v3 2/2] media: rockchip: rkisp1: extend uapi array sizes

[Heiko Stuebner]

From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

Later variants of the rkisp1 block use more entries in some arrays:

RKISP1_CIF_ISP_AE_MEAN_MAX                 25 -> 81
RKISP1_CIF_ISP_HIST_BIN_N_MAX              16 -> 32
RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       17 -> 34
RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28 -> 81

and we can still extend the uapi during the 5.11-rc cycle, so do that
now to be on the safe side.

V10 and V11 only need the smaller sizes, while V12 and V13 needed
the larger sizes.

When adding the bigger sizes make sure, values filled from hardware
values and transmitted to userspace don't leak kernel data by zeroing
them beforehand.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
---
 .../platform/rockchip/rkisp1/rkisp1-params.c  |  2 +-
 .../platform/rockchip/rkisp1/rkisp1-stats.c   | 12 +++++--
 include/uapi/linux/rkisp1-config.h            | 36 ++++++++++++++++---
 3 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
index 6af4d551ffb5..fa47fe2a02d0 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
@@ -391,7 +391,7 @@ static void rkisp1_goc_config(struct rkisp1_params *params,
 				RKISP1_CIF_ISP_CTRL_ISP_GAMMA_OUT_ENA);
 	rkisp1_write(params->rkisp1, arg->mode, RKISP1_CIF_ISP_GAMMA_OUT_MODE);
 
-	for (i = 0; i < RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES; i++)
+	for (i = 0; i < RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10; i++)
 		rkisp1_write(params->rkisp1, arg->gamma_y[i],
 			     RKISP1_CIF_ISP_GAMMA_OUT_Y_0 + i * 4);
 }
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
index 3ddab8fa8f2d..a26de388ca13 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
@@ -202,8 +202,12 @@ static void rkisp1_stats_get_aec_meas(struct rkisp1_stats *stats,
 	struct rkisp1_device *rkisp1 = stats->rkisp1;
 	unsigned int i;
 
+	/* the global max can be bigger than the version-specific one */
+	memset(pbuf->params.ae.exp_mean, 0, RKISP1_CIF_ISP_AE_MEAN_MAX *
+					    sizeof(*pbuf->params.ae.exp_mean));
+
 	pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AUTOEXP;
-	for (i = 0; i < RKISP1_CIF_ISP_AE_MEAN_MAX; i++)
+	for (i = 0; i < RKISP1_CIF_ISP_AE_MEAN_MAX_V10; i++)
 		pbuf->params.ae.exp_mean[i] =
 			(u8)rkisp1_read(rkisp1,
 					RKISP1_CIF_ISP_EXP_MEAN_00 + i * 4);
@@ -232,8 +236,12 @@ static void rkisp1_stats_get_hst_meas(struct rkisp1_stats *stats,
 	struct rkisp1_device *rkisp1 = stats->rkisp1;
 	unsigned int i;
 
+	/* the global max can be bigger then the version-specific one */
+	memset(pbuf->params.hist.hist_bins, 0, RKISP1_CIF_ISP_HIST_BIN_N_MAX *
+					       sizeof(*pbuf->params.hist.hist_bins));
+
 	pbuf->meas_type |= RKISP1_CIF_ISP_STAT_HIST;
-	for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX; i++)
+	for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX_V10; i++)
 		pbuf->params.hist.hist_bins[i] =
 			(u8)rkisp1_read(rkisp1,
 					RKISP1_CIF_ISP_HIST_BIN_0 + i * 4);
diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
index bad46aadf838..aa4ace7264d3 100644
--- a/include/uapi/linux/rkisp1-config.h
+++ b/include/uapi/linux/rkisp1-config.h
@@ -49,8 +49,14 @@
 #define RKISP1_CIF_ISP_CTK_COEFF_MAX            0x100
 #define RKISP1_CIF_ISP_CTK_OFFSET_MAX           0x800
 
-#define RKISP1_CIF_ISP_AE_MEAN_MAX              25
-#define RKISP1_CIF_ISP_HIST_BIN_N_MAX           16
+#define RKISP1_CIF_ISP_AE_MEAN_MAX_V10		25
+#define RKISP1_CIF_ISP_AE_MEAN_MAX_V12		81
+#define RKISP1_CIF_ISP_AE_MEAN_MAX		RKISP1_CIF_ISP_AE_MEAN_MAX_V12
+
+#define RKISP1_CIF_ISP_HIST_BIN_N_MAX_V10	16
+#define RKISP1_CIF_ISP_HIST_BIN_N_MAX_V12	32
+#define RKISP1_CIF_ISP_HIST_BIN_N_MAX		RKISP1_CIF_ISP_HIST_BIN_N_MAX_V12
+
 #define RKISP1_CIF_ISP_AFM_MAX_WINDOWS          3
 #define RKISP1_CIF_ISP_DEGAMMA_CURVE_SIZE       17
 
@@ -86,7 +92,9 @@
  * Gamma out
  */
 /* Maximum number of color samples supported */
-#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       17
+#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10   17
+#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V12   34
+#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V12
 
 /*
  * Lens shade correction
@@ -103,7 +111,9 @@
  * Histogram calculation
  */
 /* Last 3 values unused. */
-#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28
+#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V10 28
+#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V12 81
+#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE     RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V12
 
 /*
  * Defect Pixel Cluster Correction
@@ -517,6 +527,10 @@ enum rkisp1_cif_isp_goc_mode {
  *
  * @mode: goc mode (from enum rkisp1_cif_isp_goc_mode)
  * @gamma_y: gamma out curve y-axis for all color components
+ *
+ * The number of entries is dependent on the hw_revision,
+ * see RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10 vs _V12 and the
+ * global maximum is the bigger of the two.
  */
 struct rkisp1_cif_isp_goc_config {
 	__u32 mode;
@@ -531,6 +545,10 @@ struct rkisp1_cif_isp_goc_config {
  *			  skipped
  * @meas_window: coordinates of the measure window
  * @hist_weight: weighting factor for sub-windows
+ *
+ * The number of entries of weighting factors is dependent on the hw_revision,
+ * see RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V10 vs _V12 and the
+ * global maximum is the bigger of the two.
  */
 struct rkisp1_cif_isp_hst_config {
 	__u32 mode;
@@ -818,7 +836,11 @@ struct rkisp1_cif_isp_bls_meas_val {
  * @exp_mean: Mean luminance value of block xx
  * @bls_val:  BLS measured values
  *
- * Image is divided into 5x5 blocks.
+ * The number of entries is dependent on the hw_revision,
+ * see RKISP1_CIF_ISP_AE_MEAN_MAX_V10 vs _V12 and the
+ * global maximum is the bigger of the two.
+ *
+ * Image is divided into 5x5 blocks on V10 and 9x9 blocks on V12.
  */
 struct rkisp1_cif_isp_ae_stat {
 	__u8 exp_mean[RKISP1_CIF_ISP_AE_MEAN_MAX];
@@ -855,6 +877,10 @@ struct rkisp1_cif_isp_af_stat {
  *
  * Measurement window divided into 25 sub-windows, set
  * with ISP_HIST_XXX
+ *
+ * The number of entries is dependent on the hw_revision,
+ * see RKISP1_CIF_ISP_HIST_BIN_N_MAX_V10 vs _V12 and the
+ * global maximum is the bigger of the two.
  */
 struct rkisp1_cif_isp_hist_stat {
 	__u16 hist_bins[RKISP1_CIF_ISP_HIST_BIN_N_MAX];
-- 
2.29.2


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Re: [PATCH v3 2/2] media: rockchip: rkisp1: extend uapi array sizes

[Ezequiel Garcia]

On Fri, 2021-01-15 at 12:23 +0100, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> Later variants of the rkisp1 block use more entries in some arrays:
> 
> RKISP1_CIF_ISP_AE_MEAN_MAX                 25 -> 81
> RKISP1_CIF_ISP_HIST_BIN_N_MAX              16 -> 32
> RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       17 -> 34
> RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28 -> 81
> 
> and we can still extend the uapi during the 5.11-rc cycle, so do that
> now to be on the safe side.
> 
> V10 and V11 only need the smaller sizes, while V12 and V13 needed
> the larger sizes.
> 
> When adding the bigger sizes make sure, values filled from hardware
> values and transmitted to userspace don't leak kernel data by zeroing
> them beforehand.
> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>

Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>

Thanks,
Ezequiel


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Re: [PATCH v3 2/2] media: rockchip: rkisp1: extend uapi array sizes

[Dafna Hirschfeld]

Am 15.01.21 um 13:21 schrieb Ezequiel Garcia:
> On Fri, 2021-01-15 at 12:23 +0100, Heiko Stuebner wrote:
>> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
>>
>> Later variants of the rkisp1 block use more entries in some arrays:
>>
>> RKISP1_CIF_ISP_AE_MEAN_MAX                 25 -> 81
>> RKISP1_CIF_ISP_HIST_BIN_N_MAX              16 -> 32
>> RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       17 -> 34
>> RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28 -> 81
>>
>> and we can still extend the uapi during the 5.11-rc cycle, so do that
>> now to be on the safe side.
>>
>> V10 and V11 only need the smaller sizes, while V12 and V13 needed
>> the larger sizes.
>>
>> When adding the bigger sizes make sure, values filled from hardware
>> values and transmitted to userspace don't leak kernel data by zeroing
>> them beforehand.
>>
>> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>

Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>

Thanks,
Dafna

> 
> Thanks,
> Ezequiel
> 

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Re: [PATCH v3 2/2] media: rockchip: rkisp1: extend uapi array sizes

[Hans Verkuil]

On 15/01/2021 12:23, Heiko Stuebner wrote:
> From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> 
> Later variants of the rkisp1 block use more entries in some arrays:
> 
> RKISP1_CIF_ISP_AE_MEAN_MAX                 25 -> 81
> RKISP1_CIF_ISP_HIST_BIN_N_MAX              16 -> 32
> RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       17 -> 34
> RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28 -> 81
> 
> and we can still extend the uapi during the 5.11-rc cycle, so do that
> now to be on the safe side.
> 
> V10 and V11 only need the smaller sizes, while V12 and V13 needed
> the larger sizes.
> 
> When adding the bigger sizes make sure, values filled from hardware
> values and transmitted to userspace don't leak kernel data by zeroing
> them beforehand.
> 
> Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
> ---
>  .../platform/rockchip/rkisp1/rkisp1-params.c  |  2 +-
>  .../platform/rockchip/rkisp1/rkisp1-stats.c   | 12 +++++--
>  include/uapi/linux/rkisp1-config.h            | 36 ++++++++++++++++---
>  3 files changed, 42 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> index 6af4d551ffb5..fa47fe2a02d0 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-params.c
> @@ -391,7 +391,7 @@ static void rkisp1_goc_config(struct rkisp1_params *params,
>  				RKISP1_CIF_ISP_CTRL_ISP_GAMMA_OUT_ENA);
>  	rkisp1_write(params->rkisp1, arg->mode, RKISP1_CIF_ISP_GAMMA_OUT_MODE);
>  
> -	for (i = 0; i < RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES; i++)
> +	for (i = 0; i < RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10; i++)
>  		rkisp1_write(params->rkisp1, arg->gamma_y[i],
>  			     RKISP1_CIF_ISP_GAMMA_OUT_Y_0 + i * 4);
>  }
> diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
> index 3ddab8fa8f2d..a26de388ca13 100644
> --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
> +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-stats.c
> @@ -202,8 +202,12 @@ static void rkisp1_stats_get_aec_meas(struct rkisp1_stats *stats,
>  	struct rkisp1_device *rkisp1 = stats->rkisp1;
>  	unsigned int i;
>  
> +	/* the global max can be bigger than the version-specific one */
> +	memset(pbuf->params.ae.exp_mean, 0, RKISP1_CIF_ISP_AE_MEAN_MAX *
> +					    sizeof(*pbuf->params.ae.exp_mean));
> +
>  	pbuf->meas_type |= RKISP1_CIF_ISP_STAT_AUTOEXP;
> -	for (i = 0; i < RKISP1_CIF_ISP_AE_MEAN_MAX; i++)
> +	for (i = 0; i < RKISP1_CIF_ISP_AE_MEAN_MAX_V10; i++)
>  		pbuf->params.ae.exp_mean[i] =
>  			(u8)rkisp1_read(rkisp1,
>  					RKISP1_CIF_ISP_EXP_MEAN_00 + i * 4);
> @@ -232,8 +236,12 @@ static void rkisp1_stats_get_hst_meas(struct rkisp1_stats *stats,
>  	struct rkisp1_device *rkisp1 = stats->rkisp1;
>  	unsigned int i;
>  
> +	/* the global max can be bigger then the version-specific one */
> +	memset(pbuf->params.hist.hist_bins, 0, RKISP1_CIF_ISP_HIST_BIN_N_MAX *
> +					       sizeof(*pbuf->params.hist.hist_bins));
> +
>  	pbuf->meas_type |= RKISP1_CIF_ISP_STAT_HIST;
> -	for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX; i++)
> +	for (i = 0; i < RKISP1_CIF_ISP_HIST_BIN_N_MAX_V10; i++)
>  		pbuf->params.hist.hist_bins[i] =
>  			(u8)rkisp1_read(rkisp1,
>  					RKISP1_CIF_ISP_HIST_BIN_0 + i * 4);
> diff --git a/include/uapi/linux/rkisp1-config.h b/include/uapi/linux/rkisp1-config.h
> index bad46aadf838..aa4ace7264d3 100644
> --- a/include/uapi/linux/rkisp1-config.h
> +++ b/include/uapi/linux/rkisp1-config.h
> @@ -49,8 +49,14 @@
>  #define RKISP1_CIF_ISP_CTK_COEFF_MAX            0x100
>  #define RKISP1_CIF_ISP_CTK_OFFSET_MAX           0x800
>  
> -#define RKISP1_CIF_ISP_AE_MEAN_MAX              25
> -#define RKISP1_CIF_ISP_HIST_BIN_N_MAX           16
> +#define RKISP1_CIF_ISP_AE_MEAN_MAX_V10		25
> +#define RKISP1_CIF_ISP_AE_MEAN_MAX_V12		81
> +#define RKISP1_CIF_ISP_AE_MEAN_MAX		RKISP1_CIF_ISP_AE_MEAN_MAX_V12
> +
> +#define RKISP1_CIF_ISP_HIST_BIN_N_MAX_V10	16
> +#define RKISP1_CIF_ISP_HIST_BIN_N_MAX_V12	32
> +#define RKISP1_CIF_ISP_HIST_BIN_N_MAX		RKISP1_CIF_ISP_HIST_BIN_N_MAX_V12
> +
>  #define RKISP1_CIF_ISP_AFM_MAX_WINDOWS          3
>  #define RKISP1_CIF_ISP_DEGAMMA_CURVE_SIZE       17
>  
> @@ -86,7 +92,9 @@
>   * Gamma out
>   */
>  /* Maximum number of color samples supported */
> -#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       17
> +#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10   17
> +#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V12   34
> +#define RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES       RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V12
>  
>  /*
>   * Lens shade correction
> @@ -103,7 +111,9 @@
>   * Histogram calculation
>   */
>  /* Last 3 values unused. */
> -#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE 28
> +#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V10 28
> +#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V12 81
> +#define RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE     RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V12
>  
>  /*
>   * Defect Pixel Cluster Correction
> @@ -517,6 +527,10 @@ enum rkisp1_cif_isp_goc_mode {
>   *
>   * @mode: goc mode (from enum rkisp1_cif_isp_goc_mode)
>   * @gamma_y: gamma out curve y-axis for all color components
> + *
> + * The number of entries is dependent on the hw_revision,
> + * see RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10 vs _V12 and the
> + * global maximum is the bigger of the two.

This is too vague. How about this:

"The number of entries of @gamma_y depends on the hardware revision
as is reported by the hw_revision field of the struct media_device_info
that is returned by ioctl MEDIA_IOC_DEVICE_INFO.

Versions <= V11 have RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V10
entries, versions >= V12 have RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES_V12
entries. RKISP1_CIF_ISP_GAMMA_OUT_MAX_SAMPLES is equal to the maximum
of the two."

Similar text is needed elsewhere in this header as well were applicable.

Remember that this is a non-obvious difference, so more precise documentation
than normally is needed.

>   */
>  struct rkisp1_cif_isp_goc_config {
>  	__u32 mode;
> @@ -531,6 +545,10 @@ struct rkisp1_cif_isp_goc_config {
>   *			  skipped
>   * @meas_window: coordinates of the measure window
>   * @hist_weight: weighting factor for sub-windows
> + *
> + * The number of entries of weighting factors is dependent on the hw_revision,
> + * see RKISP1_CIF_ISP_HISTOGRAM_WEIGHT_GRIDS_SIZE_V10 vs _V12 and the
> + * global maximum is the bigger of the two.
>   */
>  struct rkisp1_cif_isp_hst_config {
>  	__u32 mode;
> @@ -818,7 +836,11 @@ struct rkisp1_cif_isp_bls_meas_val {
>   * @exp_mean: Mean luminance value of block xx
>   * @bls_val:  BLS measured values
>   *
> - * Image is divided into 5x5 blocks.
> + * The number of entries is dependent on the hw_revision,
> + * see RKISP1_CIF_ISP_AE_MEAN_MAX_V10 vs _V12 and the
> + * global maximum is the bigger of the two.
> + *
> + * Image is divided into 5x5 blocks on V10 and 9x9 blocks on V12.
>   */
>  struct rkisp1_cif_isp_ae_stat {
>  	__u8 exp_mean[RKISP1_CIF_ISP_AE_MEAN_MAX];
> @@ -855,6 +877,10 @@ struct rkisp1_cif_isp_af_stat {
>   *
>   * Measurement window divided into 25 sub-windows, set

This is 25 for V10/11 and 81 for V12/13.

>   * with ISP_HIST_XXX
> + *
> + * The number of entries is dependent on the hw_revision,
> + * see RKISP1_CIF_ISP_HIST_BIN_N_MAX_V10 vs _V12 and the
> + * global maximum is the bigger of the two.
>   */
>  struct rkisp1_cif_isp_hist_stat {
>  	__u16 hist_bins[RKISP1_CIF_ISP_HIST_BIN_N_MAX];
> 

Regards,

	Hans

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