media: imx: set a media_device bus_info string

BugLink: https://bugs.launchpad.net/bugs/1953387
[ Upstream commit 6d0d779b212c27293d9ccb4da092ff0ccb6efa39 ]

Some tools like v4l2-compliance let users select a media device based
on the bus_info string which can be quite convenient. Use a unique
string for that.

This also fixes the following v4l2-compliance warning:
warn: v4l2-test-media.cpp(52): empty bus_info

Signed-off-by: Martin Kepplinger <martin.kepplinger@puri.sm>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>

diff --git a/drivers/staging/media/imx/imx-media-dev-common.c b/drivers/staging/media/imx/imx-media-dev-common.c
index 66b505f7e8dff92048672c9dbe61e2d8cad183b7..137e414cda186eaf63bff4f351fd7ca87cc6c88a 100644 (file)
--- a/drivers/staging/media/imx/imx-media-dev-common.c
+++ b/drivers/staging/media/imx/imx-media-dev-common.c
@@ -373,6 +373,8 @@ struct imx_media_dev *imx_media_dev_init(struct device *dev,
        imxmd->v4l2_dev.notify = imx_media_notify;
        strscpy(imxmd->v4l2_dev.name, "imx-media",
                sizeof(imxmd->v4l2_dev.name));
+       snprintf(imxmd->md.bus_info, sizeof(imxmd->md.bus_info),
+                "platform:%s", dev_name(imxmd->md.dev));
 
        media_device_init(&imxmd->md);