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From: Sowjanya Komatineni <skomatineni@nvidia.com>
To: <skomatineni@nvidia.com>, <thierry.reding@gmail.com>,
	<jonathanh@nvidia.com>, <frankc@nvidia.com>, <hverkuil@xs4all.nl>,
	<sakari.ailus@iki.fi>, <robh+dt@kernel.org>,
	<helen.koike@collabora.com>
Cc: <digetx@gmail.com>, <sboyd@kernel.org>,
	<gregkh@linuxfoundation.org>, <linux-media@vger.kernel.org>,
	<devicetree@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <linux-i2c@vger.kernel.org>
Subject: [RFC PATCH v6 05/10] media: tegra-video: Separate CSI stream enable and disable implementations
Date: Fri, 31 Jul 2020 02:02:44 -0700
Message-ID: <1596186169-18729-6-git-send-email-skomatineni@nvidia.com> (raw)
In-Reply-To: <1596186169-18729-1-git-send-email-skomatineni@nvidia.com>

This patch separates implementation of CSI stream enable and disable
into separate functions for readability.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
 drivers/staging/media/tegra-video/csi.c | 51 ++++++++++++++++++++++-----------
 1 file changed, 35 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/media/tegra-video/csi.c b/drivers/staging/media/tegra-video/csi.c
index fb667df..cfe6187 100644
--- a/drivers/staging/media/tegra-video/csi.c
+++ b/drivers/staging/media/tegra-video/csi.c
@@ -232,34 +232,53 @@ static int tegra_csi_g_frame_interval(struct v4l2_subdev *subdev,
 	return 0;
 }
 
-static int tegra_csi_s_stream(struct v4l2_subdev *subdev, int enable)
+static int tegra_csi_enable_stream(struct v4l2_subdev *subdev)
 {
 	struct tegra_vi_channel *chan = v4l2_get_subdev_hostdata(subdev);
 	struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
 	struct tegra_csi *csi = csi_chan->csi;
-	int ret = 0;
+	int ret;
+
+	ret = pm_runtime_get_sync(csi->dev);
+	if (ret < 0) {
+		dev_err(csi->dev, "failed to get runtime PM: %d\n", ret);
+		pm_runtime_put_noidle(csi->dev);
+		return ret;
+	}
 
 	csi_chan->pg_mode = chan->pg_mode;
-	if (enable) {
-		ret = pm_runtime_get_sync(csi->dev);
-		if (ret < 0) {
-			dev_err(csi->dev,
-				"failed to get runtime PM: %d\n", ret);
-			pm_runtime_put_noidle(csi->dev);
-			return ret;
-		}
+	ret = csi->ops->csi_start_streaming(csi_chan);
+	if (ret < 0)
+		goto rpm_put;
 
-		ret = csi->ops->csi_start_streaming(csi_chan);
-		if (ret < 0)
-			goto rpm_put;
+	return 0;
 
-		return 0;
-	}
+rpm_put:
+	pm_runtime_put(csi->dev);
+	return ret;
+}
+
+static int tegra_csi_disable_stream(struct v4l2_subdev *subdev)
+{
+	struct tegra_csi_channel *csi_chan = to_csi_chan(subdev);
+	struct tegra_csi *csi = csi_chan->csi;
 
 	csi->ops->csi_stop_streaming(csi_chan);
 
-rpm_put:
 	pm_runtime_put(csi->dev);
+
+	return 0;
+}
+
+static int tegra_csi_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+	int ret;
+
+	if (enable)
+		ret = tegra_csi_enable_stream(subdev);
+	else
+		ret = tegra_csi_disable_stream(subdev);
+
 	return ret;
 }
 
-- 
2.7.4


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-31  9:02 [RFC PATCH v6 00/10] Support for Tegra video capture from external sensor Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 01/10] media: tegra-video: Fix channel format alignment Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 02/10] media: tegra-video: Enable TPG based on kernel config Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 03/10] media: tegra-video: Update format lookup to offset based Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 04/10] dt-bindings: tegra: Update VI and CSI bindings with port info Sowjanya Komatineni
2020-07-31  9:02 ` Sowjanya Komatineni [this message]
2020-07-31 12:06   ` [RFC PATCH v6 05/10] media: tegra-video: Separate CSI stream enable and disable implementations Dmitry Osipenko
2020-07-31  9:02 ` [RFC PATCH v6 06/10] media: tegra-video: Add support for external sensor capture Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 07/10] media: tegra-video: Add support for selection ioctl ops Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 08/10] gpu: host1x: mipi: Keep MIPI clock enabled till calibration is done Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 09/10] media: tegra-video: Add CSI MIPI pads calibration Sowjanya Komatineni
2020-07-31 11:39   ` Dmitry Osipenko
2020-07-31 15:46     ` Sowjanya Komatineni
2020-07-31 16:14       ` Dmitry Osipenko
2020-07-31 16:29         ` Sowjanya Komatineni
2020-07-31  9:02 ` [RFC PATCH v6 10/10] media: tegra-video: Compute settle times based on the clock rate Sowjanya Komatineni
2020-07-31 13:40 ` [RFC PATCH v6 00/10] Support for Tegra video capture from external sensor Wolfram Sang
2020-07-31 15:49   ` Sowjanya Komatineni

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