[PATCH 46/55] media: rkisp1: Make the internal CSI-2 receiver optional

[Paul Elder]

From: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

Not all ISP versions integrate a MIPI CSI-2 receiver.

Signed-off-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 .../platform/rockchip/rkisp1/rkisp1-dev.c     | 50 +++++++++++++------
 1 file changed, 34 insertions(+), 16 deletions(-)

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
index 8ccd4042f3f3..62fa2bd275fe 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c
@@ -195,6 +195,14 @@ static int rkisp1_subdev_notifier_register(struct rkisp1_device *rkisp1)
 
 		switch (reg) {
 		case 0:
+			/* MIPI CSI-2 port */
+			if (!(rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)) {
+				dev_err(rkisp1->dev,
+					"internal CSI must be available for port 0\n");
+				ret = -EINVAL;
+				break;
+			}
+
 			vep.bus_type = V4L2_MBUS_CSI2_DPHY;
 			break;
 
@@ -320,13 +328,16 @@ static int rkisp1_create_links(struct rkisp1_device *rkisp1)
 	unsigned int i;
 	int ret;
 
-	/* Link the CSI receiver to the ISP. */
-	ret = media_create_pad_link(&rkisp1->csi.sd.entity, RKISP1_CSI_PAD_SRC,
-				    &rkisp1->isp.sd.entity,
-				    RKISP1_ISP_PAD_SINK_VIDEO,
-				    MEDIA_LNK_FL_ENABLED);
-	if (ret)
-		return ret;
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
+		/* Link the CSI receiver to the ISP. */
+		ret = media_create_pad_link(&rkisp1->csi.sd.entity,
+					    RKISP1_CSI_PAD_SRC,
+					    &rkisp1->isp.sd.entity,
+					    RKISP1_ISP_PAD_SINK_VIDEO,
+					    MEDIA_LNK_FL_ENABLED);
+		if (ret)
+			return ret;
+	}
 
 	/* create ISP->RSZ->CAP links */
 	for (i = 0; i < 2; i++) {
@@ -369,7 +380,8 @@ static int rkisp1_create_links(struct rkisp1_device *rkisp1)
 
 static void rkisp1_entities_unregister(struct rkisp1_device *rkisp1)
 {
-	rkisp1_csi_unregister(rkisp1);
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
+		rkisp1_csi_unregister(rkisp1);
 	rkisp1_params_unregister(rkisp1);
 	rkisp1_stats_unregister(rkisp1);
 	rkisp1_capture_devs_unregister(rkisp1);
@@ -401,9 +413,11 @@ static int rkisp1_entities_register(struct rkisp1_device *rkisp1)
 	if (ret)
 		goto error;
 
-	ret = rkisp1_csi_register(rkisp1);
-	if (ret)
-		goto error;
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
+		ret = rkisp1_csi_register(rkisp1);
+		if (ret)
+			goto error;
+	}
 
 	ret = rkisp1_create_links(rkisp1);
 	if (ret)
@@ -566,9 +580,11 @@ static int rkisp1_probe(struct platform_device *pdev)
 		goto err_unreg_v4l2_dev;
 	}
 
-	ret = rkisp1_csi_init(rkisp1);
-	if (ret)
-		goto err_unreg_media_dev;
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2) {
+		ret = rkisp1_csi_init(rkisp1);
+		if (ret)
+			goto err_unreg_media_dev;
+	}
 
 	ret = rkisp1_entities_register(rkisp1);
 	if (ret)
@@ -585,7 +601,8 @@ static int rkisp1_probe(struct platform_device *pdev)
 err_unreg_entities:
 	rkisp1_entities_unregister(rkisp1);
 err_cleanup_csi:
-	rkisp1_csi_cleanup(rkisp1);
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
+		rkisp1_csi_cleanup(rkisp1);
 err_unreg_media_dev:
 	media_device_unregister(&rkisp1->media_dev);
 err_unreg_v4l2_dev:
@@ -603,7 +620,8 @@ static int rkisp1_remove(struct platform_device *pdev)
 	v4l2_async_nf_cleanup(&rkisp1->notifier);
 
 	rkisp1_entities_unregister(rkisp1);
-	rkisp1_csi_cleanup(rkisp1);
+	if (rkisp1->info->features & RKISP1_FEATURE_MIPI_CSI2)
+		rkisp1_csi_cleanup(rkisp1);
 	rkisp1_debug_cleanup(rkisp1);
 
 	media_device_unregister(&rkisp1->media_dev);
-- 
2.30.2