On Fri Jun 13 17:34:26 2025 +0200, Niklas Söderlund wrote:
> Prepare to move Gen2 and earlier models to media controller by
> generating a unique VIN group id for each VIN instance. On Gen3 and Gen4
> it is important to have a specific id in the group as media graph routes
> depend on this. On Gen2 and earlier models all that will matter is to
> have a unique id in the range.
>
> Break out the id generation to a own function keeping the logic for Gen3
> and Gen4 while generating a sequential id for Gen2 models.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
> Tested-by: Tomi Valkeinen <tomi.valkeinen+rene...@ideasonboard.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
> Link:
> https://lore.kernel.org/r/20250613153434.2001800-6-niklas.soderlund+rene...@ragnatech.se
> Signed-off-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> Signed-off-by: Hans Verkuil <hverk...@xs4all.nl>
Patch committed.
Thanks,
Hans Verkuil
.../media/platform/renesas/rcar-vin/rcar-core.c | 85 +++++++++++++++++-----
1 file changed, 65 insertions(+), 20 deletions(-)
---
diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-core.c
b/drivers/media/platform/renesas/rcar-vin/rcar-core.c
index 59751ec23a15..55957dd95576 100644
--- a/drivers/media/platform/renesas/rcar-vin/rcar-core.c
+++ b/drivers/media/platform/renesas/rcar-vin/rcar-core.c
@@ -10,6 +10,7 @@
* Based on the soc-camera rcar_vin driver
*/
+#include <linux/idr.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
@@ -55,6 +56,7 @@
* be only one group for all instances.
*/
+static DEFINE_IDA(rvin_ida);
static DEFINE_MUTEX(rvin_group_lock);
static struct rvin_group *rvin_group_data;
@@ -119,23 +121,8 @@ static int rvin_group_get(struct rvin_dev *vin,
const struct media_device_ops *ops)
{
struct rvin_group *group;
- u32 id;
int ret;
- /* Make sure VIN id is present and sane */
- ret = of_property_read_u32(vin->dev->of_node, "renesas,id", &id);
- if (ret) {
- vin_err(vin, "%pOF: No renesas,id property found\n",
- vin->dev->of_node);
- return -EINVAL;
- }
-
- if (id >= RCAR_VIN_NUM) {
- vin_err(vin, "%pOF: Invalid renesas,id '%u'\n",
- vin->dev->of_node, id);
- return -EINVAL;
- }
-
/* Join or create a VIN group */
mutex_lock(&rvin_group_lock);
if (rvin_group_data) {
@@ -165,16 +152,15 @@ static int rvin_group_get(struct rvin_dev *vin,
/* Add VIN to group */
mutex_lock(&group->lock);
- if (group->vin[id]) {
- vin_err(vin, "Duplicate renesas,id property value %u\n", id);
+ if (group->vin[vin->id]) {
+ vin_err(vin, "Duplicate renesas,id property value %u\n",
vin->id);
mutex_unlock(&group->lock);
kref_put(&group->refcount, rvin_group_release);
return -EINVAL;
}
- group->vin[id] = vin;
+ group->vin[vin->id] = vin;
- vin->id = id;
vin->group = group;
vin->v4l2_dev.mdev = &group->mdev;
@@ -1363,6 +1349,56 @@ static const struct of_device_id rvin_of_id_table[] = {
};
MODULE_DEVICE_TABLE(of, rvin_of_id_table);
+static int rvin_id_get(struct rvin_dev *vin)
+{
+ u32 oid;
+ int id;
+
+ switch (vin->info->model) {
+ case RCAR_GEN3:
+ case RCAR_GEN4:
+ if (of_property_read_u32(vin->dev->of_node, "renesas,id",
&oid)) {
+ vin_err(vin, "%pOF: No renesas,id property found\n",
+ vin->dev->of_node);
+ return -EINVAL;
+ }
+
+ if (oid < 0 || oid >= RCAR_VIN_NUM) {
+ vin_err(vin, "%pOF: Invalid renesas,id '%u'\n",
+ vin->dev->of_node, oid);
+ return -EINVAL;
+ }
+
+ vin->id = oid;
+ break;
+ default:
+ id = ida_alloc_range(&rvin_ida, 0, RCAR_VIN_NUM - 1,
+ GFP_KERNEL);
+ if (id < 0) {
+ vin_err(vin, "%pOF: Failed to allocate VIN group ID\n",
+ vin->dev->of_node);
+ return -EINVAL;
+ }
+
+ vin->id = id;
+ break;
+ }
+
+ return 0;
+}
+
+static void rvin_id_put(struct rvin_dev *vin)
+{
+ switch (vin->info->model) {
+ case RCAR_GEN3:
+ case RCAR_GEN4:
+ break;
+ default:
+ ida_free(&rvin_ida, vin->id);
+ break;
+ }
+}
+
static int rcar_vin_probe(struct platform_device *pdev)
{
struct rvin_dev *vin;
@@ -1390,6 +1426,11 @@ static int rcar_vin_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, vin);
+ if (rvin_id_get(vin)) {
+ ret = -EINVAL;
+ goto err_dma;
+ }
+
if (vin->info->use_isp) {
ret = rvin_isp_init(vin);
} else if (vin->info->use_mc) {
@@ -1406,13 +1447,15 @@ static int rcar_vin_probe(struct platform_device *pdev)
}
if (ret)
- goto err_dma;
+ goto err_id;
pm_suspend_ignore_children(&pdev->dev, true);
pm_runtime_enable(&pdev->dev);
return 0;
+err_id:
+ rvin_id_put(vin);
err_dma:
rvin_dma_unregister(vin);
@@ -1434,6 +1477,8 @@ static void rcar_vin_remove(struct platform_device *pdev)
else
rvin_parallel_cleanup(vin);
+ rvin_id_put(vin);
+
rvin_dma_unregister(vin);
}
