linux-kernel - [PATCH v1 6/9] media: tegra-video: Add support for EDID ioctl ops

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Message-ID: <1603222575-14427-7-git-send-email-skomatineni@nvidia.com>
Date:   Tue, 20 Oct 2020 12:36:12 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     <skomatineni@...dia.com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <hverkuil@...all.nl>
CC:     <mchehab@...nel.org>, <linux-media@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 6/9] media: tegra-video: Add support for EDID ioctl ops

This patch adds support for EDID get and set v4l2 ioctl ops to use
with HDMI to CSI bridges.

Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
---
 drivers/staging/media/tegra-video/vi.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
index d0d84da..92f36b1 100644
--- a/drivers/staging/media/tegra-video/vi.c
+++ b/drivers/staging/media/tegra-video/vi.c
@@ -721,6 +721,32 @@ static int tegra_channel_s_selection(struct file *file, void *fh,
 	return ret;
 }
 
+static int tegra_channel_g_edid(struct file *file, void *fh,
+				struct v4l2_edid *edid)
+{
+	struct tegra_vi_channel *chan = video_drvdata(file);
+	struct v4l2_subdev *subdev;
+
+	subdev = tegra_channel_get_remote_source_subdev(chan);
+	if (!v4l2_subdev_has_op(subdev, pad, get_edid))
+		return -ENOTTY;
+
+	return v4l2_subdev_call(subdev, pad, get_edid, edid);
+}
+
+static int tegra_channel_s_edid(struct file *file, void *fh,
+				struct v4l2_edid *edid)
+{
+	struct tegra_vi_channel *chan = video_drvdata(file);
+	struct v4l2_subdev *subdev;
+
+	subdev = tegra_channel_get_remote_source_subdev(chan);
+	if (!v4l2_subdev_has_op(subdev, pad, set_edid))
+		return -ENOTTY;
+
+	return v4l2_subdev_call(subdev, pad, set_edid, edid);
+}
+
 static int tegra_channel_g_dv_timings(struct file *file, void *fh,
 				      struct v4l2_dv_timings *timings)
 {
@@ -871,6 +897,8 @@ static const struct v4l2_ioctl_ops tegra_channel_ioctl_ops = {
 	.vidioc_unsubscribe_event	= v4l2_event_unsubscribe,
 	.vidioc_g_selection		= tegra_channel_g_selection,
 	.vidioc_s_selection		= tegra_channel_s_selection,
+	.vidioc_g_edid			= tegra_channel_g_edid,
+	.vidioc_s_edid			= tegra_channel_s_edid,
 	.vidioc_g_dv_timings		= tegra_channel_g_dv_timings,
 	.vidioc_s_dv_timings		= tegra_channel_s_dv_timings,
 	.vidioc_query_dv_timings	= tegra_channel_query_dv_timings,
-- 
2.7.4