diff mbox

[RFC,v2,02/21] media: Add media device request state

Message ID 1464108451-28142-3-git-send-email-sakari.ailus@linux.intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Sakari Ailus May 24, 2016, 4:47 p.m. UTC 
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/media-device.c | 9 +++++++++
 include/media/media-device.h | 8 ++++++++
 2 files changed, 17 insertions(+)
diff mbox

Patch

diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 85b13db..7781c49 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -38,6 +38,14 @@ 
 
 #ifdef CONFIG_MEDIA_CONTROLLER
 
+static char *__request_state[] = {
+	"IDLE",
+	"QUEUED",
+};
+
+#define request_state(i)			\
+	((i) < ARRAY_SIZE(__request_state) ? __request_state[i] : "UNKNOWN")
+
 struct media_device_fh {
 	struct media_devnode_fh fh;
 	struct list_head requests;
@@ -140,6 +148,7 @@  static int media_device_request_alloc(struct media_device *mdev,
 	req->mdev = mdev;
 	req->id = id;
 	req->filp = filp;
+	req->state = MEDIA_DEVICE_REQUEST_STATE_IDLE;
 	kref_init(&req->kref);
 
 	spin_lock_irqsave(&mdev->req_lock, flags);
diff --git a/include/media/media-device.h b/include/media/media-device.h
index 39442ae..893e10b 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -265,6 +265,11 @@ 
 struct device;
 struct media_device;
 
+enum media_device_request_state {
+	MEDIA_DEVICE_REQUEST_STATE_IDLE,
+	MEDIA_DEVICE_REQUEST_STATE_QUEUED,
+};
+
 /**
  * struct media_device_request - Media device request
  * @id: Request ID
@@ -272,6 +277,8 @@  struct media_device;
  * @kref: Reference count
  * @list: List entry in the media device requests list
  * @fh_list: List entry in the media file handle requests list
+ * @state: The state of the request, MEDIA_DEVICE_REQUEST_STATE_*,
+ *	   access to state serialised by mdev->req_lock
  */
 struct media_device_request {
 	u32 id;
@@ -280,6 +287,7 @@  struct media_device_request {
 	struct kref kref;
 	struct list_head list;
 	struct list_head fh_list;
+	enum media_device_request_state state;
 };
 
 /**