[PATCH 0/9] media: stm32: csi / dcmipp corrections

[PATCH 0/9] media: stm32: csi / dcmipp corrections

[Alain Volmat]

Various fixes within the stm32 csi bindings/drivers and
stm32 dcmipp driver.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
Alain Volmat (9):
      media: stm32: dcmipp: correct ret type in dcmipp_graph_notify_bound
      dt-bindings: media: clarify stm32 csi & simplify example
      media: stm32: csi: add missing pm_runtime_put on error
      media: stm32: csi: register subdev only at end of probe
      media: stm32: csi: use ARRAY_SIZE to search D-PHY table
      media: stm32: csi: simplify enable_streams error handling
      media: stm32: csi: remove useless fwnode_graph_get_endpoint call
      media: stm32: csi: correct unsigned or useless variable settings
      media: stm32: dcmipp: add has_csi2 & needs_mclk in match data

 .../bindings/media/st,stm32mp25-csi.yaml           |   5 +-
 drivers/media/platform/st/stm32/stm32-csi.c        | 102 +++++++++++----------
 .../platform/st/stm32/stm32-dcmipp/dcmipp-core.c   |  23 +++--
 3 files changed, 67 insertions(+), 63 deletions(-)
---
base-commit: d216d9cb4dd854ef0a2ec1701f403facb298af51
change-id: 20241217-csi_dcmipp_mp25_enhancements-89e0eef194bf

Best regards,
-- 
Alain Volmat <alain.volmat@foss.st.com>

[PATCH 1/9] media: stm32: dcmipp: correct ret type in dcmipp_graph_notify_bound

[Alain Volmat]

The ret variable used within the function dcmipp_graph_notify_bound is
wrongly defined as unsigned int while it can also be signed.

Fixes: 28e0f3772296 ("media: stm32-dcmipp: STM32 DCMIPP camera interface driver")
Cc: stable@vger.kernel.org
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c
index 71acf539e1f3..5a04018a6a9d 100644
--- a/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c
+++ b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c
@@ -296,7 +296,7 @@ static int dcmipp_graph_notify_bound(struct v4l2_async_notifier *notifier,
 				     struct v4l2_async_connection *asd)
 {
 	struct dcmipp_device *dcmipp = notifier_to_dcmipp(notifier);
-	unsigned int ret;
+	int ret;
 	int src_pad, i;
 	struct dcmipp_ent_device *sink;
 	struct v4l2_fwnode_endpoint vep = { 0 };

-- 
2.34.1

[PATCH 2/9] dt-bindings: media: clarify stm32 csi & simplify example

[Alain Volmat]

Clarify the description of the stm32 csi by mentioning CSI-2 and
D-PHY.
Remove the bus-type property from the example.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
index 33bedfe41924..e9fa3cfea5d2 100644
--- a/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
+++ b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
@@ -7,8 +7,8 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: STMicroelectronics STM32 CSI controller
 
 description:
-  The STM32 CSI controller allows connecting a CSI based
-  camera to the DCMIPP camera pipeline.
+  The STM32 CSI controller, coupled with a D-PHY allows connecting a CSI-2
+  based camera to the DCMIPP camera pipeline.
 
 maintainers:
   - Alain Volmat <alain.volmat@foss.st.com>
@@ -109,7 +109,6 @@ examples:
                 endpoint {
                     remote-endpoint = <&imx335_ep>;
                     data-lanes = <1 2>;
-                    bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;
                 };
             };
 

-- 
2.34.1

Re: [PATCH 2/9] dt-bindings: media: clarify stm32 csi & simplify example

[Conor Dooley]

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On Tue, Dec 17, 2024 at 06:39:19PM +0100, Alain Volmat wrote:
> Clarify the description of the stm32 csi by mentioning CSI-2 and
> D-PHY.

> Remove the bus-type property from the example.

Why? What's there to gain from the example being (seemingly?) less
comprehensive?

> 
> Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
> ---
>  Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> index 33bedfe41924..e9fa3cfea5d2 100644
> --- a/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> +++ b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> @@ -7,8 +7,8 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
>  title: STMicroelectronics STM32 CSI controller
>  
>  description:
> -  The STM32 CSI controller allows connecting a CSI based
> -  camera to the DCMIPP camera pipeline.
> +  The STM32 CSI controller, coupled with a D-PHY allows connecting a CSI-2
> +  based camera to the DCMIPP camera pipeline.
>  
>  maintainers:
>    - Alain Volmat <alain.volmat@foss.st.com>
> @@ -109,7 +109,6 @@ examples:
>                  endpoint {
>                      remote-endpoint = <&imx335_ep>;
>                      data-lanes = <1 2>;
> -                    bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;
>                  };
>              };
>  
> 
> -- 
> 2.34.1
> 

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Re: [PATCH 2/9] dt-bindings: media: clarify stm32 csi & simplify example

[Sakari Ailus]

Hi Conor,

On Tue, Dec 17, 2024 at 06:24:42PM +0000, Conor Dooley wrote:
> On Tue, Dec 17, 2024 at 06:39:19PM +0100, Alain Volmat wrote:
> > Clarify the description of the stm32 csi by mentioning CSI-2 and
> > D-PHY.
> 
> > Remove the bus-type property from the example.
> 
> Why? What's there to gain from the example being (seemingly?) less
> comprehensive?

As the device has D-PHY, other options are excluded. I.e. that property is
redundant for this device.

> 
> > 
> > Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
> > ---
> >  Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml | 5 ++---
> >  1 file changed, 2 insertions(+), 3 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> > index 33bedfe41924..e9fa3cfea5d2 100644
> > --- a/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> > +++ b/Documentation/devicetree/bindings/media/st,stm32mp25-csi.yaml
> > @@ -7,8 +7,8 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
> >  title: STMicroelectronics STM32 CSI controller
> >  
> >  description:
> > -  The STM32 CSI controller allows connecting a CSI based
> > -  camera to the DCMIPP camera pipeline.
> > +  The STM32 CSI controller, coupled with a D-PHY allows connecting a CSI-2
> > +  based camera to the DCMIPP camera pipeline.
> >  
> >  maintainers:
> >    - Alain Volmat <alain.volmat@foss.st.com>
> > @@ -109,7 +109,6 @@ examples:
> >                  endpoint {
> >                      remote-endpoint = <&imx335_ep>;
> >                      data-lanes = <1 2>;
> > -                    bus-type = <MEDIA_BUS_TYPE_CSI2_DPHY>;
> >                  };
> >              };
> >  
> > 

-- 
Kind regards,

Sakari Ailus

Re: [PATCH 2/9] dt-bindings: media: clarify stm32 csi & simplify example

[Conor Dooley]

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On Tue, Dec 17, 2024 at 09:12:55PM +0000, Sakari Ailus wrote:
> Hi Conor,
> 
> On Tue, Dec 17, 2024 at 06:24:42PM +0000, Conor Dooley wrote:
> > On Tue, Dec 17, 2024 at 06:39:19PM +0100, Alain Volmat wrote:
> > > Clarify the description of the stm32 csi by mentioning CSI-2 and
> > > D-PHY.
> > 
> > > Remove the bus-type property from the example.
> > 
> > Why? What's there to gain from the example being (seemingly?) less
> > comprehensive?
> 
> As the device has D-PHY, other options are excluded. I.e. that property is
> redundant for this device.

That should be mentioned in the commit message.

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Re: [PATCH 2/9] dt-bindings: media: clarify stm32 csi & simplify example

[Alain Volmat]

Hi Conor,

On Wed, Dec 18, 2024 at 06:25:11PM +0000, Conor Dooley wrote:
> On Tue, Dec 17, 2024 at 09:12:55PM +0000, Sakari Ailus wrote:
> > Hi Conor,
> > 
> > On Tue, Dec 17, 2024 at 06:24:42PM +0000, Conor Dooley wrote:
> > > On Tue, Dec 17, 2024 at 06:39:19PM +0100, Alain Volmat wrote:
> > > > Clarify the description of the stm32 csi by mentioning CSI-2 and
> > > > D-PHY.
> > > 
> > > > Remove the bus-type property from the example.
> > > 
> > > Why? What's there to gain from the example being (seemingly?) less
> > > comprehensive?
> > 
> > As the device has D-PHY, other options are excluded. I.e. that property is
> > redundant for this device.
> 
> That should be mentioned in the commit message.

Ok, I'll push a v2 with that commit message fixed.

Alain

[PATCH 3/9] media: stm32: csi: add missing pm_runtime_put on error

[Alain Volmat]

Within the stm32_csi_start function, pm_runtime_put should
be called upon error following pm_runtime_get_sync.
Rework the function error handling by putting a label in
order to have common error handling for all calls requiring
pm_runtime_put.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 48941aae8c9b..e2f63bb47d33 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -497,21 +497,19 @@ static int stm32_csi_start(struct stm32_csi_dev *csidev,
 
 	ret = pm_runtime_get_sync(csidev->dev);
 	if (ret < 0)
-		return ret;
+		goto error_put;
 
 	/* Retrieve CSI2PHY clock rate to compute CCFR value */
 	phy_clk_frate = clk_get_rate(csidev->clks[STM32_CSI_CLK_CSI2PHY].clk);
 	if (!phy_clk_frate) {
-		pm_runtime_put(csidev->dev);
 		dev_err(csidev->dev, "CSI2PHY clock rate invalid (0)\n");
-		return ret;
+		ret = -EINVAL;
+		goto error_put;
 	}
 
 	ret = stm32_csi_setup_lane_merger(csidev);
-	if (ret) {
-		pm_runtime_put(csidev->dev);
-		return ret;
-	}
+	if (ret)
+		goto error_put;
 
 	/* Enable the CSI */
 	writel_relaxed(STM32_CSI_CR_CSIEN, csidev->base + STM32_CSI_CR);
@@ -567,6 +565,10 @@ static int stm32_csi_start(struct stm32_csi_dev *csidev,
 	writel_relaxed(0, csidev->base + STM32_CSI_PMCR);
 
 	return ret;
+
+error_put:
+	pm_runtime_put(csidev->dev);
+	return ret;
 }
 
 static void stm32_csi_stop(struct stm32_csi_dev *csidev)

-- 
2.34.1

[PATCH 4/9] media: stm32: csi: register subdev only at end of probe

[Alain Volmat]

Call v4l2_async_register_subdev only whenever all initialization
are completed at the end of the probe function.
Remove as well useless err_free_priv label by returning directly
upon error.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index e2f63bb47d33..89fcd7d07904 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -991,11 +991,11 @@ static int stm32_csi_probe(struct platform_device *pdev)
 
 	ret = stm32_csi_get_resources(csidev, pdev);
 	if (ret)
-		goto err_free_priv;
+		return ret;
 
 	ret = stm32_csi_parse_dt(csidev);
 	if (ret)
-		goto err_free_priv;
+		return ret;
 
 	csidev->sd.owner = THIS_MODULE;
 	csidev->sd.dev = &pdev->dev;
@@ -1020,10 +1020,6 @@ static int stm32_csi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto err_cleanup;
 
-	ret = v4l2_async_register_subdev(&csidev->sd);
-	if (ret < 0)
-		goto err_cleanup;
-
 	/* Reset device */
 	rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
 	if (IS_ERR(rstc)) {
@@ -1050,6 +1046,10 @@ static int stm32_csi_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(&pdev->dev);
 
+	ret = v4l2_async_register_subdev(&csidev->sd);
+	if (ret < 0)
+		goto err_cleanup;
+
 	dev_info(&pdev->dev,
 		 "Probed CSI with %u lanes\n", csidev->num_lanes);
 
@@ -1057,7 +1057,6 @@ static int stm32_csi_probe(struct platform_device *pdev)
 
 err_cleanup:
 	v4l2_async_nf_cleanup(&csidev->notifier);
-err_free_priv:
 	return ret;
 }
 

-- 
2.34.1

[PATCH 5/9] media: stm32: csi: use ARRAY_SIZE to search D-PHY table

[Alain Volmat]

Within stm32_csi_start, use ARRAY_SIZE loop in order to search
for the right setting.
Avoid useless init of lanes_ie / lanes_en.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 89fcd7d07904..3654f9895dbc 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -325,7 +325,6 @@ static const struct stm32_csi_mbps_phy_reg snps_stm32mp25[] = {
 	{ .mbps = 2400, .hsfreqrange = 0x47,	.osc_freq_target = 442 },
 	{ .mbps = 2450, .hsfreqrange = 0x48,	.osc_freq_target = 451 },
 	{ .mbps = 2500, .hsfreqrange = 0x49,	.osc_freq_target = 460 },
-	{ /* sentinel */ }
 };
 
 static const struct v4l2_mbus_framefmt fmt_default = {
@@ -444,13 +443,13 @@ static void stm32_csi_phy_reg_write(struct stm32_csi_dev *csidev,
 static int stm32_csi_start(struct stm32_csi_dev *csidev,
 			   struct v4l2_subdev_state *state)
 {
-	const struct stm32_csi_mbps_phy_reg *phy_regs;
+	const struct stm32_csi_mbps_phy_reg *phy_regs = NULL;
 	struct v4l2_mbus_framefmt *sink_fmt;
 	const struct stm32_csi_fmts *fmt;
 	unsigned long phy_clk_frate;
+	u32 lanes_ie, lanes_en;
 	unsigned int mbps;
-	u32 lanes_ie = 0;
-	u32 lanes_en = 0;
+	unsigned int i;
 	s64 link_freq;
 	int ret;
 	u32 ccfr;
@@ -474,11 +473,14 @@ static int stm32_csi_start(struct stm32_csi_dev *csidev,
 	mbps = div_s64(link_freq, 500000);
 	dev_dbg(csidev->dev, "Computed Mbps: %u\n", mbps);
 
-	for (phy_regs = snps_stm32mp25; phy_regs->mbps != 0; phy_regs++)
-		if (phy_regs->mbps >= mbps)
+	for (i = 0; i < ARRAY_SIZE(snps_stm32mp25); i++) {
+		if (snps_stm32mp25[i].mbps >= mbps) {
+			phy_regs = &snps_stm32mp25[i];
 			break;
+		}
+	}
 
-	if (!phy_regs->mbps) {
+	if (!phy_regs) {
 		dev_err(csidev->dev, "Unsupported PHY speed (%u Mbps)", mbps);
 		return -ERANGE;
 	}
@@ -488,8 +490,8 @@ static int stm32_csi_start(struct stm32_csi_dev *csidev,
 		phy_regs->osc_freq_target);
 
 	/* Prepare lanes related configuration bits */
-	lanes_ie |= STM32_CSI_SR1_DL0_ERRORS;
-	lanes_en |= STM32_CSI_PCR_DL0EN;
+	lanes_ie = STM32_CSI_SR1_DL0_ERRORS;
+	lanes_en = STM32_CSI_PCR_DL0EN;
 	if (csidev->num_lanes == 2) {
 		lanes_ie |= STM32_CSI_SR1_DL1_ERRORS;
 		lanes_en |= STM32_CSI_PCR_DL1EN;

-- 
2.34.1

[PATCH 6/9] media: stm32: csi: simplify enable_streams error handling

[Alain Volmat]

Put all error handling for VC stop and CSI stop together
to avoid duplication of code.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 3654f9895dbc..4affbc00b042 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -694,19 +694,21 @@ static int stm32_csi_enable_streams(struct v4l2_subdev *sd,
 	ret = stm32_csi_start_vc(csidev, state, 0);
 	if (ret) {
 		dev_err(csidev->dev, "Failed to start VC0\n");
-		stm32_csi_stop(csidev);
-		return ret;
+		goto failed_start_vc;
 	}
 
 	ret = v4l2_subdev_enable_streams(csidev->s_subdev,
 					 csidev->s_subdev_pad_nb, BIT_ULL(0));
-	if (ret) {
-		stm32_csi_stop_vc(csidev, 0);
-		stm32_csi_stop(csidev);
-		return ret;
-	}
+	if (ret)
+		goto failed_enable_streams;
 
 	return 0;
+
+failed_enable_streams:
+	stm32_csi_stop_vc(csidev, 0);
+failed_start_vc:
+	stm32_csi_stop(csidev);
+	return ret;
 }
 
 static int stm32_csi_init_state(struct v4l2_subdev *sd,

-- 
2.34.1

[PATCH 7/9] media: stm32: csi: remove useless fwnode_graph_get_endpoint call

[Alain Volmat]

The endpoint is already retrieved at the beginning of the function
stm32_csi_parse_dt hence keep the endpoint pointer until the end
instead of getting a new one.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 4affbc00b042..1be12c9dcf55 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -932,38 +932,32 @@ static int stm32_csi_parse_dt(struct stm32_csi_dev *csidev)
 	}
 
 	ret = v4l2_fwnode_endpoint_parse(ep, &v4l2_ep);
-	fwnode_handle_put(ep);
 	if (ret) {
 		dev_err(csidev->dev, "Could not parse v4l2 endpoint\n");
-		return ret;
+		goto out;
 	}
 
 	csidev->num_lanes = v4l2_ep.bus.mipi_csi2.num_data_lanes;
 	if (csidev->num_lanes > STM32_CSI_LANES_MAX) {
 		dev_err(csidev->dev, "Unsupported number of data-lanes: %d\n",
 			csidev->num_lanes);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	memcpy(csidev->lanes, v4l2_ep.bus.mipi_csi2.data_lanes,
 	       sizeof(csidev->lanes));
 
-	ep = fwnode_graph_get_next_endpoint(dev_fwnode(csidev->dev), NULL);
-	if (!ep) {
-		dev_err(csidev->dev, "Failed to get next endpoint\n");
-		return -EINVAL;
-	}
-
 	v4l2_async_subdev_nf_init(&csidev->notifier, &csidev->sd);
 
 	asd = v4l2_async_nf_add_fwnode_remote(&csidev->notifier, ep,
 					      struct v4l2_async_connection);
 
-	fwnode_handle_put(ep);
 
 	if (IS_ERR(asd)) {
 		dev_err(csidev->dev, "Failed to add fwnode remote subdev\n");
-		return PTR_ERR(asd);
+		ret = PTR_ERR(asd);
+		goto out;
 	}
 
 	csidev->notifier.ops = &stm32_csi_notifier_ops;
@@ -972,9 +966,11 @@ static int stm32_csi_parse_dt(struct stm32_csi_dev *csidev)
 	if (ret) {
 		dev_err(csidev->dev, "Failed to register notifier\n");
 		v4l2_async_nf_cleanup(&csidev->notifier);
-		return ret;
+		goto out;
 	}
 
+out:
+	fwnode_handle_put(ep);
 	return ret;
 }
 

-- 
2.34.1

[PATCH 8/9] media: stm32: csi: correct unsigned or useless variable settings

[Alain Volmat]

Correct several missing unsigned type missing for loop variables
and also remove useless initialization of variables.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 drivers/media/platform/st/stm32/stm32-csi.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-csi.c b/drivers/media/platform/st/stm32/stm32-csi.c
index 1be12c9dcf55..602b0879f21e 100644
--- a/drivers/media/platform/st/stm32/stm32-csi.c
+++ b/drivers/media/platform/st/stm32/stm32-csi.c
@@ -357,7 +357,7 @@ static inline struct stm32_csi_dev *to_csidev(struct v4l2_subdev *sd)
 static int stm32_csi_setup_lane_merger(struct stm32_csi_dev *csidev)
 {
 	u32 lmcfgr = 0;
-	int i;
+	unsigned int i;
 
 	for (i = 0; i < csidev->num_lanes; i++) {
 		if (!csidev->lanes[i] || csidev->lanes[i] > STM32_CSI_LANES_MAX) {
@@ -595,20 +595,20 @@ static int stm32_csi_start_vc(struct stm32_csi_dev *csidev,
 {
 	struct v4l2_mbus_framefmt *mbus_fmt;
 	const struct stm32_csi_fmts *fmt;
-	u32 cfgr1 = 0;
-	int ret = 0;
 	u32 status;
+	u32 cfgr1;
+	int ret;
 
 	mbus_fmt = v4l2_subdev_state_get_format(state, STM32_CSI_PAD_SOURCE);
 	fmt = stm32_csi_code_to_fmt(mbus_fmt->code);
 
 	/* If the mbus code is JPEG, don't enable filtering */
 	if (mbus_fmt->code == MEDIA_BUS_FMT_JPEG_1X8) {
-		cfgr1 |= STM32_CSI_VCXCFGR1_ALLDT;
+		cfgr1 = STM32_CSI_VCXCFGR1_ALLDT;
 		cfgr1 |= fmt->input_fmt << STM32_CSI_VCXCFGR1_CDTFT_SHIFT;
 		dev_dbg(csidev->dev, "VC%d: enable AllDT mode\n", vc);
 	} else {
-		cfgr1 |= fmt->datatype << STM32_CSI_VCXCFGR1_DT0_SHIFT;
+		cfgr1 = fmt->datatype << STM32_CSI_VCXCFGR1_DT0_SHIFT;
 		cfgr1 |= fmt->input_fmt << STM32_CSI_VCXCFGR1_DT0FT_SHIFT;
 		cfgr1 |= STM32_CSI_VCXCFGR1_DT0EN;
 		dev_dbg(csidev->dev, "VC%d: enable DT0(0x%x)/DT0FT(0x%x)\n",
@@ -634,8 +634,8 @@ static int stm32_csi_start_vc(struct stm32_csi_dev *csidev,
 
 static int stm32_csi_stop_vc(struct stm32_csi_dev *csidev, u32 vc)
 {
-	int ret = 0;
 	u32 status;
+	int ret;
 
 	/* Stop the Virtual Channel */
 	writel_relaxed(STM32_CSI_CR_VCXSTOP(vc) | STM32_CSI_CR_CSIEN,
@@ -714,7 +714,7 @@ static int stm32_csi_enable_streams(struct v4l2_subdev *sd,
 static int stm32_csi_init_state(struct v4l2_subdev *sd,
 				struct v4l2_subdev_state *state)
 {
-	int i;
+	unsigned int i;
 
 	for (i = 0; i < sd->entity.num_pads; i++)
 		*v4l2_subdev_state_get_format(state, i) = fmt_default;
@@ -879,7 +879,8 @@ static irqreturn_t stm32_csi_irq_thread(int irq, void *arg)
 static int stm32_csi_get_resources(struct stm32_csi_dev *csidev,
 				   struct platform_device *pdev)
 {
-	int irq, ret, i;
+	unsigned int i;
+	int irq, ret;
 
 	csidev->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
 	if (IS_ERR(csidev->base))

-- 
2.34.1

[PATCH 9/9] media: stm32: dcmipp: add has_csi2 & needs_mclk in match data

[Alain Volmat]

Introduce two variable has_csi and has_mclk within the
match data of the driver in order to know, depending on
the compatible if CSI-2 interface is available and if
the mclk clk should be retrieved.

Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
---
 .../platform/st/stm32/stm32-dcmipp/dcmipp-core.c   | 23 ++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c
index 5a04018a6a9d..1b7bae3266c8 100644
--- a/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c
+++ b/drivers/media/platform/st/stm32/stm32-dcmipp/dcmipp-core.c
@@ -89,6 +89,8 @@ struct dcmipp_pipeline_config {
 	const struct dcmipp_ent_link *links;
 	size_t num_links;
 	u32 hw_revision;
+	bool has_csi2;
+	bool needs_mclk;
 };
 
 /* --------------------------------------------------------------------------
@@ -164,7 +166,9 @@ static const struct dcmipp_pipeline_config stm32mp25_pipe_cfg = {
 	.num_ents	= ARRAY_SIZE(stm32mp25_ent_config),
 	.links		= stm32mp25_ent_links,
 	.num_links	= ARRAY_SIZE(stm32mp25_ent_links),
-	.hw_revision    = DCMIPP_STM32MP25_VERR
+	.hw_revision    = DCMIPP_STM32MP25_VERR,
+	.has_csi2	= true,
+	.needs_mclk	= true
 };
 
 #define LINK_FLAG_TO_STR(f) ((f) == 0 ? "" :\
@@ -296,7 +300,7 @@ static int dcmipp_graph_notify_bound(struct v4l2_async_notifier *notifier,
 				     struct v4l2_async_connection *asd)
 {
 	struct dcmipp_device *dcmipp = notifier_to_dcmipp(notifier);
-	int ret;
+	int ret = -EINVAL;
 	int src_pad, i;
 	struct dcmipp_ent_device *sink;
 	struct v4l2_fwnode_endpoint vep = { 0 };
@@ -304,15 +308,9 @@ static int dcmipp_graph_notify_bound(struct v4l2_async_notifier *notifier,
 	enum v4l2_mbus_type supported_types[] = {
 		V4L2_MBUS_PARALLEL, V4L2_MBUS_BT656, V4L2_MBUS_CSI2_DPHY
 	};
-	int supported_types_nb = ARRAY_SIZE(supported_types);
 
 	dev_dbg(dcmipp->dev, "Subdev \"%s\" bound\n", subdev->name);
 
-	/* Only MP25 supports CSI input */
-	if (!of_device_is_compatible(dcmipp->dev->of_node,
-				     "st,stm32mp25-dcmipp"))
-		supported_types_nb--;
-
 	/*
 	 * Link this sub-device to DCMIPP, it could be
 	 * a parallel camera sensor or a CSI-2 to parallel bridge
@@ -330,7 +328,12 @@ static int dcmipp_graph_notify_bound(struct v4l2_async_notifier *notifier,
 	}
 
 	/* Check for supported MBUS type */
-	for (i = 0; i < supported_types_nb; i++) {
+	for (i = 0; i < ARRAY_SIZE(supported_types); i++) {
+		/* Only MP25 supports CSI input */
+		if (supported_types[i] == V4L2_MBUS_CSI2_DPHY &&
+		    !dcmipp->pipe_cfg->has_csi2)
+			continue;
+
 		vep.bus_type = supported_types[i];
 		ret = v4l2_fwnode_endpoint_parse(ep, &vep);
 		if (!ret)
@@ -529,7 +532,7 @@ static int dcmipp_probe(struct platform_device *pdev)
 				     "Unable to get kclk\n");
 	dcmipp->kclk = kclk;
 
-	if (!of_device_is_compatible(pdev->dev.of_node, "st,stm32mp13-dcmipp")) {
+	if (dcmipp->pipe_cfg->needs_mclk) {
 		mclk = devm_clk_get(&pdev->dev, "mclk");
 		if (IS_ERR(mclk))
 			return dev_err_probe(&pdev->dev, PTR_ERR(mclk),

-- 
2.34.1