1 files changed, 97 insertions, 37 deletions

diff --git a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
index b0f0995..d1b410b 100644
--- a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
+++ b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
@@ -36,6 +36,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/sched.h>
 
+#include <media/v4l2-async.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-dev.h>
 #include <media/soc_camera.h>
@@ -96,6 +97,10 @@ struct sh_mobile_ceu_buffer {
 
 struct sh_mobile_ceu_dev {
 	struct soc_camera_host ici;
+	/* Asynchronous CSI2 linking */
+	struct v4l2_async_subdev *csi2_asd;
+	struct v4l2_subdev *csi2_sd;
+	/* Synchronous probing compatibility */
 	struct platform_device *csi2_pdev;
 
 	unsigned int irq;
@@ -185,7 +190,6 @@ static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
 		udelay(1);
 	}
 
-
 	if (2 != success) {
 		dev_warn(pcdev->ici.v4l2_dev.dev, "soft reset time out\n");
 		return -EIO;
@@ -534,16 +538,29 @@ static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
 {
 	struct v4l2_subdev *sd;
 
-	if (!pcdev->csi2_pdev)
-		return NULL;
+	if (pcdev->csi2_sd)
+		return pcdev->csi2_sd;
 
-	v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
-		if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
-			return sd;
+	if (pcdev->csi2_asd) {
+		char name[] = "sh-mobile-csi2";
+		v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
+			if (!strncmp(name, sd->name, sizeof(name) - 1)) {
+				pcdev->csi2_sd = sd;
+				return sd;
+			}
+	}
 
 	return NULL;
 }
 
+static struct v4l2_subdev *csi2_subdev(struct sh_mobile_ceu_dev *pcdev,
+				       struct soc_camera_device *icd)
+{
+	struct v4l2_subdev *sd = pcdev->csi2_sd;
+
+	return sd && sd->grp_id == soc_camera_grp_id(icd) ? sd : NULL;
+}
+
 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 {
 	struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
@@ -564,12 +581,12 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
 	 * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver
 	 * has not found this soc-camera device among its clients
 	 */
-	if (ret == -ENODEV && csi2_sd)
+	if (csi2_sd && ret == -ENODEV)
 		csi2_sd->grp_id = 0;
 
 	dev_info(icd->parent,
-		 "SuperH Mobile CEU driver attached to camera %d\n",
-		 icd->devnum);
+		 "SuperH Mobile CEU%s driver attached to camera %d\n",
+		 csi2_sd && csi2_sd->grp_id ? "/CSI-2" : "", icd->devnum);
 
 	return 0;
 }
@@ -585,8 +602,6 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
 		 icd->devnum);
 
 	v4l2_subdev_call(csi2_sd, core, s_power, 0);
-	if (csi2_sd)
-		csi2_sd->grp_id = 0;
 }
 
 /* Called with .host_lock held */
@@ -708,7 +723,7 @@ static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
 	}
 
 	/* CSI2 special configuration */
-	if (pcdev->csi2_pdev) {
+	if (csi2_subdev(pcdev, icd)) {
 		in_width = ((in_width - 2) * 2);
 		left_offset *= 2;
 	}
@@ -765,13 +780,7 @@ static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
 static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
 					   struct soc_camera_device *icd)
 {
-	if (pcdev->csi2_pdev) {
-		struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
-		if (csi2_sd && csi2_sd->grp_id == soc_camera_grp_id(icd))
-			return csi2_sd;
-	}
-
-	return soc_camera_to_subdev(icd);
+	return csi2_subdev(pcdev, icd) ? : soc_camera_to_subdev(icd);
 }
 
 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER |	\
@@ -875,7 +884,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd)
 	value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
 	value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
 
-	if (pcdev->csi2_pdev) /* CSI2 mode */
+	if (csi2_subdev(pcdev, icd)) /* CSI2 mode */
 		value |= 3 << 12;
 	else if (pcdev->is_16bit)
 		value |= 1 << 12;
@@ -1054,7 +1063,7 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int
 		return 0;
 	}
 
-	if (!pcdev->pdata || !pcdev->pdata->csi2) {
+	if (!csi2_subdev(pcdev, icd)) {
 		/* Are there any restrictions in the CSI-2 case? */
 		ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
 		if (ret < 0)
@@ -2084,7 +2093,7 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
 	struct resource *res;
 	void __iomem *base;
 	unsigned int irq;
-	int err = 0;
+	int err, i;
 	struct bus_wait wait = {
 		.completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
 		.notifier.notifier_call = bus_notify,
@@ -2188,31 +2197,60 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
 		goto exit_free_clk;
 	}
 
-	err = soc_camera_host_register(&pcdev->ici);
-	if (err)
-		goto exit_free_ctx;
+	if (pcdev->pdata && pcdev->pdata->asd_sizes) {
+		struct v4l2_async_subdev **asd;
+		char name[] = "sh-mobile-csi2";
+		int j;
+
+		/*
+		 * CSI2 interfacing: several groups can use CSI2, pick up the
+		 * first one
+		 */
+		asd = pcdev->pdata->asd;
+		for (j = 0; pcdev->pdata->asd_sizes[j]; j++) {
+			for (i = 0; i < pcdev->pdata->asd_sizes[j]; i++, asd++) {
+				dev_dbg(&pdev->dev, "%s(): subdev #%d, type %u\n",
+					__func__, i, (*asd)->bus_type);
+				if ((*asd)->bus_type == V4L2_ASYNC_BUS_PLATFORM &&
+				    !strncmp(name, (*asd)->match.platform.name,
+					     sizeof(name) - 1)) {
+					pcdev->csi2_asd = *asd;
+					break;
+				}
+			}
+			if (pcdev->csi2_asd)
+				break;
+		}
+
+		pcdev->ici.asd = pcdev->pdata->asd;
+		pcdev->ici.asd_sizes = pcdev->pdata->asd_sizes;
+	}
 
-	/* CSI2 interfacing */
+	/* Legacy CSI2 interfacing */
 	csi2 = pcdev->pdata ? pcdev->pdata->csi2 : NULL;
 	if (csi2) {
+		/*
+		 * TODO: remove this once all users are converted to
+		 * asynchronous CSI2 probing. If it has to be kept, csi2
+		 * platform device resources have to be added, using
+		 * platform_device_add_resources()
+		 */
 		struct platform_device *csi2_pdev =
 			platform_device_alloc("sh-mobile-csi2", csi2->id);
 		struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
 
 		if (!csi2_pdev) {
 			err = -ENOMEM;
-			goto exit_host_unregister;
+			goto exit_free_ctx;
 		}
 
 		pcdev->csi2_pdev		= csi2_pdev;
 
-		err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
+		err = platform_device_add_data(csi2_pdev, csi2_pdata,
+					       sizeof(*csi2_pdata));
 		if (err < 0)
 			goto exit_pdev_put;
 
-		csi2_pdata			= csi2_pdev->dev.platform_data;
-		csi2_pdata->v4l2_dev		= &pcdev->ici.v4l2_dev;
-
 		csi2_pdev->resource		= csi2->resource;
 		csi2_pdev->num_resources	= csi2->num_resources;
 
@@ -2254,17 +2292,38 @@ static int sh_mobile_ceu_probe(struct platform_device *pdev)
 			err = -ENODEV;
 			goto exit_pdev_unregister;
 		}
+
+		pcdev->csi2_sd = platform_get_drvdata(csi2_pdev);
+	}
+
+	err = soc_camera_host_register(&pcdev->ici);
+	if (err)
+		goto exit_csi2_unregister;
+
+	if (csi2) {
+		err = v4l2_device_register_subdev(&pcdev->ici.v4l2_dev,
+						  pcdev->csi2_sd);
+		dev_dbg(&pdev->dev, "%s(): ret(register_subdev) = %d\n",
+			__func__, err);
+		if (err < 0)
+			goto exit_host_unregister;
+		/* v4l2_device_register_subdev() took a reference too */
+		module_put(pcdev->csi2_sd->owner);
 	}
 
 	return 0;
 
-exit_pdev_unregister:
-	platform_device_del(pcdev->csi2_pdev);
-exit_pdev_put:
-	pcdev->csi2_pdev->resource = NULL;
-	platform_device_put(pcdev->csi2_pdev);
 exit_host_unregister:
 	soc_camera_host_unregister(&pcdev->ici);
+exit_csi2_unregister:
+	if (csi2) {
+		module_put(pcdev->csi2_pdev->dev.driver->owner);
+exit_pdev_unregister:
+		platform_device_del(pcdev->csi2_pdev);
+exit_pdev_put:
+		pcdev->csi2_pdev->resource = NULL;
+		platform_device_put(pcdev->csi2_pdev);
+	}
 exit_free_ctx:
 	vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
 exit_free_clk:
@@ -2324,6 +2383,7 @@ MODULE_DEVICE_TABLE(of, sh_mobile_ceu_of_match);
 static struct platform_driver sh_mobile_ceu_driver = {
 	.driver		= {
 		.name	= "sh_mobile_ceu",
+		.owner	= THIS_MODULE,
 		.pm	= &sh_mobile_ceu_dev_pm_ops,
 		.of_match_table = sh_mobile_ceu_of_match,
 	},
@@ -2349,5 +2409,5 @@ module_exit(sh_mobile_ceu_exit);
 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
 MODULE_AUTHOR("Magnus Damm");
 MODULE_LICENSE("GPL");
-MODULE_VERSION("0.0.6");
+MODULE_VERSION("0.1.0");
 MODULE_ALIAS("platform:sh_mobile_ceu");