linux-kernel - [Patch 15/19] media: ti-vpe: cal: Add subdev s

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Message-ID: <20191018153437.20614-16-bparrot@ti.com>
Date:   Fri, 18 Oct 2019 10:34:33 -0500
From:   Benoit Parrot <bparrot@...com>
To:     Hans Verkuil <hverkuil@...all.nl>, Rob Herring <robh+dt@...nel.org>
CC:     <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Benoit Parrot <bparrot@...com>
Subject: [Patch 15/19] media: ti-vpe: cal: Add subdev s_power hooks

Based on V4L2 documentations bridge driver must power on and off sub
device explicitly if media-controller mode is not used.

Signed-off-by: Benoit Parrot <bparrot@...com>
---
 drivers/media/platform/ti-vpe/cal.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/media/platform/ti-vpe/cal.c b/drivers/media/platform/ti-vpe/cal.c
index 42b0063b610e..e61d2f3fd1da 100644
--- a/drivers/media/platform/ti-vpe/cal.c
+++ b/drivers/media/platform/ti-vpe/cal.c
@@ -1661,6 +1661,12 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
 	if (ret < 0)
 		goto err;
 
+	ret = v4l2_subdev_call(ctx->sensor, core, s_power, 1);
+	if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
+		ctx_err(ctx, "power on failed in subdev\n");
+		goto err;
+	}
+
 	cal_runtime_get(ctx->dev);
 
 	csi2_ctx_config(ctx);
@@ -1674,6 +1680,7 @@ static int cal_start_streaming(struct vb2_queue *vq, unsigned int count)
 
 	ret = v4l2_subdev_call(ctx->sensor, video, s_stream, 1);
 	if (ret) {
+		v4l2_subdev_call(ctx->sensor, core, s_power, 0);
 		ctx_err(ctx, "stream on failed in subdev\n");
 		cal_runtime_put(ctx->dev);
 		goto err;
@@ -1702,6 +1709,7 @@ static void cal_stop_streaming(struct vb2_queue *vq)
 	struct cal_dmaqueue *dma_q = &ctx->vidq;
 	struct cal_buffer *buf, *tmp;
 	unsigned long flags;
+	int ret;
 
 	csi2_ppi_disable(ctx);
 	disable_irqs(ctx);
@@ -1710,6 +1718,10 @@ static void cal_stop_streaming(struct vb2_queue *vq)
 	if (v4l2_subdev_call(ctx->sensor, video, s_stream, 0))
 		ctx_err(ctx, "stream off failed in subdev\n");
 
+	ret = v4l2_subdev_call(ctx->sensor, core, s_power, 0);
+	if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
+		ctx_err(ctx, "power off failed in subdev\n");
+
 	/* Release all active buffers */
 	spin_lock_irqsave(&ctx->slock, flags);
 	list_for_each_entry_safe(buf, tmp, &dma_q->active, list) {
-- 
2.17.1