linux-kernel - [PATCH v2 1/4] media: vidtv: Add media controller support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210106030449.3223172-2-dwlsalmeida@gmail.com>
Date:   Wed,  6 Jan 2021 00:04:46 -0300
From:   "Daniel W. S. Almeida" <dwlsalmeida@...il.com>
To:     mchehab@...nel.org, hverkuil@...all.nl
Cc:     "Daniel W. S. Almeida" <dwlsalmeida@...il.com>,
        linux-media@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/4] media: vidtv: Add media controller support

From: "Daniel W. S. Almeida" <dwlsalmeida@...il.com>

Add media controller support when CONFIG_MEDIA_CONTROLLER_DVB is set
so that, in the future, a test sequence in v4l-utils can be written
without having to know which /dev/fooX device should be used.

Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@...il.com>
---
 .../media/test-drivers/vidtv/vidtv_bridge.c   | 28 +++++++++++++++++++
 .../media/test-drivers/vidtv/vidtv_bridge.h   |  6 ++++
 2 files changed, 34 insertions(+)

diff --git a/drivers/media/test-drivers/vidtv/vidtv_bridge.c b/drivers/media/test-drivers/vidtv/vidtv_bridge.c
index fc64d0c8492a..a2fa9b58174d 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_bridge.c
+++ b/drivers/media/test-drivers/vidtv/vidtv_bridge.c
@@ -17,6 +17,8 @@
 #include <linux/time.h>
 #include <linux/types.h>
 #include <linux/workqueue.h>
+#include <media/dvbdev.h>
+#include <media/media-device.h>
 
 #include "vidtv_bridge.h"
 #include "vidtv_common.h"
@@ -501,9 +503,30 @@ static int vidtv_bridge_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, dvb);
 
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	dvb->mdev.dev = &pdev->dev;
+
+	strscpy(dvb->mdev.model, "vidtv", sizeof(dvb->mdev.model));
+	strscpy(dvb->mdev.bus_info, "platform:vidtv", sizeof(dvb->mdev.bus_info));
+
+	media_device_init(&dvb->mdev);
+	ret = media_device_register(&dvb->mdev);
+	if (ret) {
+		dev_err(dvb->mdev.dev,
+			"media device register failed (err=%d)\n", ret);
+		goto err_media_device_register;
+	}
+
+	dvb_register_media_controller(&dvb->adapter, &dvb->mdev);
+#endif //CONFIG_MEDIA_CONTROLLER_DVB
+
 	dev_info(&pdev->dev, "Successfully initialized vidtv!\n");
 	return ret;
 
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+err_media_device_register:
+	media_device_cleanup(&dvb->mdev);
+#endif //CONFIG_MEDIA_CONTROLLER_DVB
 err_dvb:
 	kfree(dvb);
 	return ret;
@@ -516,6 +539,11 @@ static int vidtv_bridge_remove(struct platform_device *pdev)
 
 	dvb = platform_get_drvdata(pdev);
 
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	media_device_unregister(&dvb->mdev);
+	media_device_cleanup(&dvb->mdev);
+#endif //CONFIG_MEDIA_CONTROLLER_DVB
+
 	mutex_destroy(&dvb->feed_lock);
 
 	for (i = 0; i < NUM_FE; ++i) {
diff --git a/drivers/media/test-drivers/vidtv/vidtv_bridge.h b/drivers/media/test-drivers/vidtv/vidtv_bridge.h
index 2528adaee27d..d42899a31295 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_bridge.h
+++ b/drivers/media/test-drivers/vidtv/vidtv_bridge.h
@@ -24,6 +24,7 @@
 #include <media/dmxdev.h>
 #include <media/dvb_demux.h>
 #include <media/dvb_frontend.h>
+#include <media/media-device.h>
 
 #include "vidtv_mux.h"
 
@@ -42,6 +43,7 @@
  * @feed_lock: Protects access to the start/stop stream logic/data.
  * @streaming: Whether we are streaming now.
  * @mux: The abstraction responsible for delivering MPEG TS packets to the bridge.
+ * @mdev: The media_device struct for media controller support.
  */
 struct vidtv_dvb {
 	struct platform_device *pdev;
@@ -60,6 +62,10 @@ struct vidtv_dvb {
 	bool streaming;
 
 	struct vidtv_mux *mux;
+
+#ifdef CONFIG_MEDIA_CONTROLLER_DVB
+	struct media_device mdev;
+#endif //CONFIG_MEDIA_CONTROLLER_DVB
 };
 
 #endif // VIDTV_BRIDG_H
-- 
2.30.0