linux-kernel - [PATCH v3 5/9] media: adv7180: implement g

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Message-Id: <1469293249-6774-6-git-send-email-steve_longerbeam@mentor.com>
Date:	Sat, 23 Jul 2016 10:00:45 -0700
From:	Steve Longerbeam <slongerbeam@...il.com>
To:	lars@...afoo.de
Cc:	mchehab@...nel.org, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Steve Longerbeam <steve_longerbeam@...tor.com>
Subject: [PATCH v3 5/9] media: adv7180: implement g_parm

Implement g_parm to return the current standard's frame period.

Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
Tested-by: Tim Harvey <tharvey@...eworks.com>
Acked-by: Tim Harvey <tharvey@...eworks.com>

---
v3: no changes
v2: no changes
---
 drivers/media/i2c/adv7180.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c
index 58f4eca..b8a6d94 100644
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -764,6 +764,27 @@ static int adv7180_g_mbus_config(struct v4l2_subdev *sd,
 	return 0;
 }
 
+static int adv7180_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *a)
+{
+	struct adv7180_state *state = to_state(sd);
+	struct v4l2_captureparm *cparm = &a->parm.capture;
+
+	if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	memset(a, 0, sizeof(*a));
+	a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+	if (state->curr_norm & V4L2_STD_525_60) {
+		cparm->timeperframe.numerator = 1001;
+		cparm->timeperframe.denominator = 30000;
+	} else {
+		cparm->timeperframe.numerator = 1;
+		cparm->timeperframe.denominator = 25;
+	}
+
+	return 0;
+}
+
 static int adv7180_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *cropcap)
 {
 	struct adv7180_state *state = to_state(sd);
@@ -822,6 +843,7 @@ static int adv7180_subscribe_event(struct v4l2_subdev *sd,
 static const struct v4l2_subdev_video_ops adv7180_video_ops = {
 	.s_std = adv7180_s_std,
 	.g_std = adv7180_g_std,
+	.g_parm = adv7180_g_parm,
 	.querystd = adv7180_querystd,
 	.g_input_status = adv7180_g_input_status,
 	.s_routing = adv7180_s_routing,
-- 
1.9.1