linux-kernel - [PATCH 9/9] media: stm32: dcmipp: add has_csi2 & needs

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Message-ID: <20241217-csi_dcmipp_mp25_enhancements-v1-9-2b432805d17d@foss.st.com>
Date: Tue, 17 Dec 2024 18:39:26 +0100
From: Alain Volmat <alain.volmat@...s.st.com>
To: Hugues Fruchet <hugues.fruchet@...s.st.com>,
        Mauro Carvalho Chehab
	<mchehab@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre
 Torgue <alexandre.torgue@...s.st.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: <linux-media@...r.kernel.org>, <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, Alain Volmat <alain.volmat@...s.st.com>
Subject: [PATCH 9/9] media: stm32: dcmipp: add has_csi2 & needs_mclk in
 match data

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@...s.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