diff mbox series

[v3,09/13] media: cadence: csi2rx: Use new enable stream APIs

Message ID 20250417065554.437541-10-r-donadkar@ti.com
State New
Headers show
Series media: cadence,ti: CSI2RX Multistream Support | expand

Commit Message

Rishikesh Donadkar April 17, 2025, 6:55 a.m. UTC 
From: Jai Luthra <j-luthra@ti.com>

The enable_streams() API in v4l2 supports passing a bitmask to enable
each pad/stream combination individually on any media subdev instead of
doing s_stream(1) to start all streams on the subdev at once.

This API is implemented by ds90ub960 driver (FPDLink deser) and thus the
caller (cdns-csi2x) is required to use it. For now we only enable
stream0.

Signed-off-by: Jai Luthra <j-luthra@ti.com>
Signed-off-by: Rishikesh Donadkar <r-donadkar@ti.com>
---
 drivers/media/platform/cadence/cdns-csi2rx.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

Comments

Changhuang Liang April 21, 2025, 7:01 a.m. UTC | #1 
> From: Jai Luthra <j-luthra@ti.com>
> 
> The enable_streams() API in v4l2 supports passing a bitmask to enable each
> pad/stream combination individually on any media subdev instead of doing
> s_stream(1) to start all streams on the subdev at once.
> 
> This API is implemented by ds90ub960 driver (FPDLink deser) and thus the
> caller (cdns-csi2x) is required to use it. For now we only enable stream0.
> 
> Signed-off-by: Jai Luthra <j-luthra@ti.com>
> Signed-off-by: Rishikesh Donadkar <r-donadkar@ti.com>

Reviewed-by: Changhuang Liang <changhuang.liang@starfivetech.com>

Best Regards,
Changhuang
diff mbox series

Patch

diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
index b7e9225f66a41..df05d278df379 100644
--- a/drivers/media/platform/cadence/cdns-csi2rx.c
+++ b/drivers/media/platform/cadence/cdns-csi2rx.c
@@ -224,10 +224,18 @@  static int csi2rx_configure_ext_dphy(struct csi2rx_priv *csi2rx)
 static int csi2rx_start(struct csi2rx_priv *csi2rx)
 {
 	unsigned int i;
+	struct media_pad *remote_pad;
 	unsigned long lanes_used = 0;
 	u32 reg;
 	int ret;
 
+	remote_pad = media_pad_remote_pad_first(&csi2rx->pads[CSI2RX_PAD_SINK]);
+	if (!remote_pad) {
+		dev_err(csi2rx->dev,
+			"Failed to find connected source\n");
+		return -ENODEV;
+	}
+
 	ret = clk_prepare_enable(csi2rx->p_clk);
 	if (ret)
 		return ret;
@@ -311,7 +319,8 @@  static int csi2rx_start(struct csi2rx_priv *csi2rx)
 
 	reset_control_deassert(csi2rx->sys_rst);
 
-	ret = v4l2_subdev_call(csi2rx->source_subdev, video, s_stream, true);
+	ret = v4l2_subdev_enable_streams(csi2rx->source_subdev,
+					 remote_pad->index, BIT(0));
 	if (ret)
 		goto err_disable_sysclk;
 
@@ -339,6 +348,7 @@  static int csi2rx_start(struct csi2rx_priv *csi2rx)
 
 static void csi2rx_stop(struct csi2rx_priv *csi2rx)
 {
+	struct media_pad *remote_pad;
 	unsigned int i;
 	u32 val;
 	int ret;
@@ -367,8 +377,12 @@  static void csi2rx_stop(struct csi2rx_priv *csi2rx)
 	reset_control_assert(csi2rx->p_rst);
 	clk_disable_unprepare(csi2rx->p_clk);
 
-	if (v4l2_subdev_call(csi2rx->source_subdev, video, s_stream, false))
+	remote_pad = media_pad_remote_pad_first(&csi2rx->pads[CSI2RX_PAD_SINK]);
+	if (!remote_pad ||
+	    v4l2_subdev_disable_streams(csi2rx->source_subdev,
+					remote_pad->index, BIT(0))) {
 		dev_warn(csi2rx->dev, "Couldn't disable our subdev\n");
+	}
 
 	if (csi2rx->dphy) {
 		writel(0, csi2rx->base + CSI2RX_DPHY_LANE_CTRL_REG);