Re: [PATCH v3 15/24] media: Add userspace header file for i.MX

2017-02-05 Thread Laurent Pinchart 
Hi Steve,

On Friday 13 Jan 2017 15:13:33 Steve Longerbeam wrote:
> On 01/13/2017 04:05 AM, Philipp Zabel wrote:
> > Am Freitag, den 06.01.2017, 18:11 -0800 schrieb Steve Longerbeam:
> >> This adds a header file for use by userspace programs wanting to interact
> >> with the i.MX media driver. It defines custom v4l2 controls and events
> >> generated by the i.MX v4l2 subdevices.
> >> 
> >> Signed-off-by: Steve Longerbeam 
> >> ---
> >> 
> >>   include/uapi/media/Kbuild |  1 +
> >>   include/uapi/media/imx.h  | 30 ++
> >>   2 files changed, 31 insertions(+)
> >>   create mode 100644 include/uapi/media/imx.h
> >> 
> >> diff --git a/include/uapi/media/Kbuild b/include/uapi/media/Kbuild
> >> index aafaa5a..fa78958 100644
> >> --- a/include/uapi/media/Kbuild
> >> +++ b/include/uapi/media/Kbuild
> >> @@ -1 +1,2 @@
> >> 
> >>   # UAPI Header export list
> >> 
> >> +header-y += imx.h
> >> diff --git a/include/uapi/media/imx.h b/include/uapi/media/imx.h
> >> new file mode 100644
> >> index 000..2421d9c
> >> --- /dev/null
> >> +++ b/include/uapi/media/imx.h
> >> @@ -0,0 +1,30 @@
> >> +/*
> >> + * Copyright (c) 2014-2015 Mentor Graphics Inc.
> >> + *
> >> + * This program is free software; you can redistribute it and/or modify
> >> + * it under the terms of the GNU General Public License as published by
> >> the + * Free Software Foundation; either version 2 of the
> >> + * License, or (at your option) any later version
> >> + */
> >> +
> >> +#ifndef __UAPI_MEDIA_IMX_H__
> >> +#define __UAPI_MEDIA_IMX_H__
> >> +
> >> +/*
> >> + * events from the subdevs
> >> + */
> >> +#define V4L2_EVENT_IMX_CLASS  V4L2_EVENT_PRIVATE_START
> >> +#define V4L2_EVENT_IMX_NFB4EOF(V4L2_EVENT_IMX_CLASS + 1)
> >> +#define V4L2_EVENT_IMX_EOF_TIMEOUT(V4L2_EVENT_IMX_CLASS + 2)
> >> +#define V4L2_EVENT_IMX_FRAME_INTERVAL (V4L2_EVENT_IMX_CLASS + 3)
> > 
> > Aren't these generic enough to warrant common events? I would think
> > there have to be other capture IP cores that can signal aborted frames
> > or frame timeouts.
> 
> Yes, agreed. A frame capture timeout, or frame interval error, are
> both generic concepts. At some point it would be great to make the
> Frame Interval Monitor generally available under v4l2-core. As for the
> EOF timeout event, I'll look into moving that into a generic V4L2 event.

I'd prefer generic events if possible, but regardless of whether that's 
possible, the events must be documented in the V4L2 specification.

-- 
Regards,

Laurent Pinchart

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Re: [PATCH v3 15/24] media: Add userspace header file for i.MX

2017-01-13 Thread Steve Longerbeam 



On 01/13/2017 04:05 AM, Philipp Zabel wrote:

Am Freitag, den 06.01.2017, 18:11 -0800 schrieb Steve Longerbeam:

This adds a header file for use by userspace programs wanting to interact
with the i.MX media driver. It defines custom v4l2 controls and events
generated by the i.MX v4l2 subdevices.

Signed-off-by: Steve Longerbeam 
---
  include/uapi/media/Kbuild |  1 +
  include/uapi/media/imx.h  | 30 ++
  2 files changed, 31 insertions(+)
  create mode 100644 include/uapi/media/imx.h

diff --git a/include/uapi/media/Kbuild b/include/uapi/media/Kbuild
index aafaa5a..fa78958 100644
--- a/include/uapi/media/Kbuild
+++ b/include/uapi/media/Kbuild
@@ -1 +1,2 @@
  # UAPI Header export list
+header-y += imx.h
diff --git a/include/uapi/media/imx.h b/include/uapi/media/imx.h
new file mode 100644
index 000..2421d9c
--- /dev/null
+++ b/include/uapi/media/imx.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2014-2015 Mentor Graphics Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+
+#ifndef __UAPI_MEDIA_IMX_H__
+#define __UAPI_MEDIA_IMX_H__
+
+/*
+ * events from the subdevs
+ */
+#define V4L2_EVENT_IMX_CLASS  V4L2_EVENT_PRIVATE_START
+#define V4L2_EVENT_IMX_NFB4EOF(V4L2_EVENT_IMX_CLASS + 1)
+#define V4L2_EVENT_IMX_EOF_TIMEOUT(V4L2_EVENT_IMX_CLASS + 2)
+#define V4L2_EVENT_IMX_FRAME_INTERVAL (V4L2_EVENT_IMX_CLASS + 3)

Aren't these generic enough to warrant common events? I would think
there have to be other capture IP cores that can signal aborted frames
or frame timeouts.


Yes, agreed. A frame capture timeout, or frame interval error, are
both generic concepts. At some point it would be great to make the
Frame Interval Monitor generally available under v4l2-core. As for the
EOF timeout event, I'll look into moving that into a generic V4L2 event.

Steve


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Re: [PATCH v3 15/24] media: Add userspace header file for i.MX

2017-01-13 Thread Philipp Zabel 
Am Freitag, den 06.01.2017, 18:11 -0800 schrieb Steve Longerbeam:
> This adds a header file for use by userspace programs wanting to interact
> with the i.MX media driver. It defines custom v4l2 controls and events
> generated by the i.MX v4l2 subdevices.
> 
> Signed-off-by: Steve Longerbeam 
> ---
>  include/uapi/media/Kbuild |  1 +
>  include/uapi/media/imx.h  | 30 ++
>  2 files changed, 31 insertions(+)
>  create mode 100644 include/uapi/media/imx.h
> 
> diff --git a/include/uapi/media/Kbuild b/include/uapi/media/Kbuild
> index aafaa5a..fa78958 100644
> --- a/include/uapi/media/Kbuild
> +++ b/include/uapi/media/Kbuild
> @@ -1 +1,2 @@
>  # UAPI Header export list
> +header-y += imx.h
> diff --git a/include/uapi/media/imx.h b/include/uapi/media/imx.h
> new file mode 100644
> index 000..2421d9c
> --- /dev/null
> +++ b/include/uapi/media/imx.h
> @@ -0,0 +1,30 @@
> +/*
> + * Copyright (c) 2014-2015 Mentor Graphics Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by the
> + * Free Software Foundation; either version 2 of the
> + * License, or (at your option) any later version
> + */
> +
> +#ifndef __UAPI_MEDIA_IMX_H__
> +#define __UAPI_MEDIA_IMX_H__
> +
> +/*
> + * events from the subdevs
> + */
> +#define V4L2_EVENT_IMX_CLASS  V4L2_EVENT_PRIVATE_START
> +#define V4L2_EVENT_IMX_NFB4EOF(V4L2_EVENT_IMX_CLASS + 1)
> +#define V4L2_EVENT_IMX_EOF_TIMEOUT(V4L2_EVENT_IMX_CLASS + 2)
> +#define V4L2_EVENT_IMX_FRAME_INTERVAL (V4L2_EVENT_IMX_CLASS + 3)

Aren't these generic enough to warrant common events? I would think
there have to be other capture IP cores that can signal aborted frames
or frame timeouts.

> +
> +enum imx_ctrl_id {
> + V4L2_CID_IMX_MOTION = (V4L2_CID_USER_IMX_BASE + 0),
> + V4L2_CID_IMX_FIM_ENABLE,
> + V4L2_CID_IMX_FIM_NUM,
> + V4L2_CID_IMX_FIM_TOLERANCE_MIN,
> + V4L2_CID_IMX_FIM_TOLERANCE_MAX,
> + V4L2_CID_IMX_FIM_NUM_SKIP,
> +};
> +
> +#endif

regards
Philipp

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[PATCH v3 15/24] media: Add userspace header file for i.MX

2017-01-06 Thread Steve Longerbeam 
This adds a header file for use by userspace programs wanting to interact
with the i.MX media driver. It defines custom v4l2 controls and events
generated by the i.MX v4l2 subdevices.

Signed-off-by: Steve Longerbeam 
---
 include/uapi/media/Kbuild |  1 +
 include/uapi/media/imx.h  | 30 ++
 2 files changed, 31 insertions(+)
 create mode 100644 include/uapi/media/imx.h

diff --git a/include/uapi/media/Kbuild b/include/uapi/media/Kbuild
index aafaa5a..fa78958 100644
--- a/include/uapi/media/Kbuild
+++ b/include/uapi/media/Kbuild
@@ -1 +1,2 @@
 # UAPI Header export list
+header-y += imx.h
diff --git a/include/uapi/media/imx.h b/include/uapi/media/imx.h
new file mode 100644
index 000..2421d9c
--- /dev/null
+++ b/include/uapi/media/imx.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2014-2015 Mentor Graphics Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version
+ */
+
+#ifndef __UAPI_MEDIA_IMX_H__
+#define __UAPI_MEDIA_IMX_H__
+
+/*
+ * events from the subdevs
+ */
+#define V4L2_EVENT_IMX_CLASS  V4L2_EVENT_PRIVATE_START
+#define V4L2_EVENT_IMX_NFB4EOF(V4L2_EVENT_IMX_CLASS + 1)
+#define V4L2_EVENT_IMX_EOF_TIMEOUT(V4L2_EVENT_IMX_CLASS + 2)
+#define V4L2_EVENT_IMX_FRAME_INTERVAL (V4L2_EVENT_IMX_CLASS + 3)
+
+enum imx_ctrl_id {
+   V4L2_CID_IMX_MOTION = (V4L2_CID_USER_IMX_BASE + 0),
+   V4L2_CID_IMX_FIM_ENABLE,
+   V4L2_CID_IMX_FIM_NUM,
+   V4L2_CID_IMX_FIM_TOLERANCE_MIN,
+   V4L2_CID_IMX_FIM_TOLERANCE_MAX,
+   V4L2_CID_IMX_FIM_NUM_SKIP,
+};
+
+#endif
-- 
2.7.4

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