From: Jacopo Mondi <jacopo+renesas@jmondi.org>
Date: Thu, 10 Jan 2019 14:02:12 +0000 (-0500)
Subject: media: adv748x: Store the TX sink in HDMI/AFE
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a33df6ac31513c499e4b8dae9632e641ebe4a245;p=linux.git

media: adv748x: Store the TX sink in HDMI/AFE

Both the AFE and HDMI s_stream routines (adv748x_afe_s_stream() and
adv748x_hdmi_s_stream()) have to enable the CSI-2 TX they are streaming video
data to.

With the introduction of dynamic routing between HDMI and AFE entities to
TXA, the video stream sink needs to be set at run time, and not statically
selected as the s_stream functions are currently doing.

To fix this, store a reference to the active CSI-2 TX sink for both HDMI and
AFE sources, and operate on it when starting/stopping the stream.

Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---

diff --git a/drivers/media/i2c/adv748x/adv748x-afe.c b/drivers/media/i2c/adv748x/adv748x-afe.c
index 71714634efb08..dbbb1e4d63637 100644
--- a/drivers/media/i2c/adv748x/adv748x-afe.c
+++ b/drivers/media/i2c/adv748x/adv748x-afe.c
@@ -282,7 +282,7 @@ static int adv748x_afe_s_stream(struct v4l2_subdev *sd, int enable)
 			goto unlock;
 	}
 
-	ret = adv748x_tx_power(&state->txb, enable);
+	ret = adv748x_tx_power(afe->tx, enable);
 	if (ret)
 		goto unlock;
 
diff --git a/drivers/media/i2c/adv748x/adv748x-csi2.c b/drivers/media/i2c/adv748x/adv748x-csi2.c
index 353b6b9bf6a79..2091cda509356 100644
--- a/drivers/media/i2c/adv748x/adv748x-csi2.c
+++ b/drivers/media/i2c/adv748x/adv748x-csi2.c
@@ -88,14 +88,25 @@ static int adv748x_csi2_registered(struct v4l2_subdev *sd)
 						 is_txb(tx));
 		if (ret)
 			return ret;
+
+		/* TXB can output AFE signals only. */
+		if (is_txb(tx))
+			state->afe.tx = tx;
 	}
 
 	/* Register link to HDMI for TXA only. */
 	if (is_txb(tx) || !is_hdmi_enabled(state))
 		return 0;
 
-	return adv748x_csi2_register_link(tx, sd->v4l2_dev, &state->hdmi.sd,
-					  ADV748X_HDMI_SOURCE, true);
+	ret = adv748x_csi2_register_link(tx, sd->v4l2_dev, &state->hdmi.sd,
+					 ADV748X_HDMI_SOURCE, true);
+	if (ret)
+		return ret;
+
+	/* The default HDMI output is TXA. */
+	state->hdmi.tx = tx;
+
+	return 0;
 }
 
 static const struct v4l2_subdev_internal_ops adv748x_csi2_internal_ops = {
diff --git a/drivers/media/i2c/adv748x/adv748x-hdmi.c b/drivers/media/i2c/adv748x/adv748x-hdmi.c
index 35d027941482a..c557f8fdf11a8 100644
--- a/drivers/media/i2c/adv748x/adv748x-hdmi.c
+++ b/drivers/media/i2c/adv748x/adv748x-hdmi.c
@@ -358,7 +358,7 @@ static int adv748x_hdmi_s_stream(struct v4l2_subdev *sd, int enable)
 
 	mutex_lock(&state->mutex);
 
-	ret = adv748x_tx_power(&state->txa, enable);
+	ret = adv748x_tx_power(hdmi->tx, enable);
 	if (ret)
 		goto done;
 
diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h
index d22270f5e2c17..934a9d9a75c81 100644
--- a/drivers/media/i2c/adv748x/adv748x.h
+++ b/drivers/media/i2c/adv748x/adv748x.h
@@ -121,6 +121,8 @@ struct adv748x_hdmi {
 	struct v4l2_dv_timings timings;
 	struct v4l2_fract aspect_ratio;
 
+	struct adv748x_csi2 *tx;
+
 	struct {
 		u8 edid[512];
 		u32 present;
@@ -151,6 +153,8 @@ struct adv748x_afe {
 	struct v4l2_subdev sd;
 	struct v4l2_mbus_framefmt format;
 
+	struct adv748x_csi2 *tx;
+
 	bool streaming;
 	v4l2_std_id curr_norm;
 	unsigned int input;