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From:   Sowjanya Komatineni <skomatineni@nvidia.com>
To:     <skomatineni@nvidia.com>, <thierry.reding@gmail.com>,
        <jonathanh@nvidia.com>, <hverkuil@xs4all.nl>,
        <sakari.ailus@iki.fi>, <robh+dt@kernel.org>
CC:     <bparrot@ti.com>, <mchehab@kernel.org>,
        <linux-media@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v3 06/13] media: tegra-video: Add support for EDID ioctl ops
Date:   Thu, 3 Dec 2020 10:59:55 -0800
Message-ID: <1607022002-26575-7-git-send-email-skomatineni@nvidia.com>
In-Reply-To: <1607022002-26575-1-git-send-email-skomatineni@nvidia.com>
References: <1607022002-26575-1-git-send-email-skomatineni@nvidia.com>
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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@nvidia.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 d01e88d..bc38136 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)
 {
@@ -873,6 +899,8 @@ 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