[PATCH v3 34/38] media: ti-vpe: cal: add camerarx enable/disable refcounting

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The following patches add multistream support and we will have multiple
video devices using the same camerarx instances. Thus we need
enable/disable refcounting for the camerarx.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
---
 drivers/media/platform/ti-vpe/cal-camerarx.c | 10 ++++++++++
 drivers/media/platform/ti-vpe/cal.h          |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c
index b87ffc52feb6..803d53753e87 100644
--- a/drivers/media/platform/ti-vpe/cal-camerarx.c
+++ b/drivers/media/platform/ti-vpe/cal-camerarx.c
@@ -285,6 +285,11 @@ static int cal_camerarx_start(struct cal_camerarx *phy)
 	u32 val;
 	int ret;
 
+	if (phy->enable_count > 0) {
+		phy->enable_count++;
+		return 0;
+	}
+
 	link_freq = cal_camerarx_get_ext_link_freq(phy);
 	if (link_freq < 0)
 		return link_freq;
@@ -409,6 +414,8 @@ static int cal_camerarx_start(struct cal_camerarx *phy)
 	/* Finally, enable the PHY Protocol Interface (PPI). */
 	cal_camerarx_ppi_enable(phy);
 
+	phy->enable_count++;
+
 	return 0;
 }
 
@@ -416,6 +423,9 @@ static void cal_camerarx_stop(struct cal_camerarx *phy)
 {
 	int ret;
 
+	if (--phy->enable_count > 0)
+		return;
+
 	cal_camerarx_ppi_disable(phy);
 
 	cal_camerarx_disable_irqs(phy);
diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti-vpe/cal.h
index 78bd2e041d9a..8608a2c6c01a 100644
--- a/drivers/media/platform/ti-vpe/cal.h
+++ b/drivers/media/platform/ti-vpe/cal.h
@@ -166,6 +166,8 @@ struct cal_camerarx {
 
 	/* mutex for camerarx ops */
 	struct mutex		mutex;
+
+	unsigned int enable_count;
 };
 
 struct cal_dev {
-- 
2.25.1




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