* [PATCH 1/3] properly report a single frame rate of 60 FPS
@ 2016-05-13 22:19 Florian Echtler
2016-05-13 22:19 ` [PATCH 2/3] lower poll interval to fix occasional FPS drops to ~56 FPS Florian Echtler
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Florian Echtler @ 2016-05-13 22:19 UTC (permalink / raw)
To: linux-media; +Cc: hverkuil, Florian Echtler, Martin Kaltenbrunner
The device hardware is always running at 60 FPS, so report this both via
PARM_IOCTL and ENUM_FRAMEINTERVALS.
Signed-off-by: Martin Kaltenbrunner <modin@yuri.at>
Signed-off-by: Florian Echtler <floe@butterbrot.org>
---
drivers/input/touchscreen/sur40.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 880c40b..fcc5934 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -788,6 +788,16 @@ static int sur40_vidioc_fmt(struct file *file, void *priv,
return 0;
}
+static int sur40_ioctl_parm(struct file *file, void *priv,
+ struct v4l2_streamparm *p)
+{
+ if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
+ p->parm.capture.timeperframe.numerator = 1;
+ p->parm.capture.timeperframe.denominator = 60;
+ }
+ return 0;
+}
+
static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
@@ -814,13 +824,13 @@ static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv,
struct v4l2_frmivalenum *f)
{
- if ((f->index > 1) || (f->pixel_format != V4L2_PIX_FMT_GREY)
+ if ((f->index > 0) || (f->pixel_format != V4L2_PIX_FMT_GREY)
|| (f->width != sur40_video_format.width)
|| (f->height != sur40_video_format.height))
return -EINVAL;
f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
- f->discrete.denominator = 60/(f->index+1);
+ f->discrete.denominator = 60;
f->discrete.numerator = 1;
return 0;
}
@@ -880,6 +890,9 @@ static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
+ .vidioc_g_parm = sur40_ioctl_parm,
+ .vidioc_s_parm = sur40_ioctl_parm,
+
.vidioc_enum_input = sur40_vidioc_enum_input,
.vidioc_g_input = sur40_vidioc_g_input,
.vidioc_s_input = sur40_vidioc_s_input,
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/3] lower poll interval to fix occasional FPS drops to ~56 FPS
2016-05-13 22:19 [PATCH 1/3] properly report a single frame rate of 60 FPS Florian Echtler
@ 2016-05-13 22:19 ` Florian Echtler
2016-05-13 22:19 ` [PATCH 3/3] fix occasional oopses on device close Florian Echtler
2016-05-23 10:45 ` [PATCH 1/3] properly report a single frame rate of 60 FPS Hans Verkuil
2 siblings, 0 replies; 5+ messages in thread
From: Florian Echtler @ 2016-05-13 22:19 UTC (permalink / raw)
To: linux-media; +Cc: hverkuil, Florian Echtler, Martin Kaltenbrunner
The framerate sometimes drops below 60 Hz if the poll interval is too high.
Lowering it to the minimum of 1 ms fixes this.
Signed-off-by: Martin Kaltenbrunner <modin@yuri.at>
Signed-off-by: Florian Echtler <floe@butterbrot.org>
---
drivers/input/touchscreen/sur40.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index fcc5934..7b1052a1 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -126,7 +126,7 @@ struct sur40_image_header {
#define VIDEO_PACKET_SIZE 16384
/* polling interval (ms) */
-#define POLL_INTERVAL 4
+#define POLL_INTERVAL 1
/* maximum number of contacts FIXME: this is a guess? */
#define MAX_CONTACTS 64
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 3/3] fix occasional oopses on device close
2016-05-13 22:19 [PATCH 1/3] properly report a single frame rate of 60 FPS Florian Echtler
2016-05-13 22:19 ` [PATCH 2/3] lower poll interval to fix occasional FPS drops to ~56 FPS Florian Echtler
@ 2016-05-13 22:19 ` Florian Echtler
2016-05-23 10:45 ` [PATCH 1/3] properly report a single frame rate of 60 FPS Hans Verkuil
2 siblings, 0 replies; 5+ messages in thread
From: Florian Echtler @ 2016-05-13 22:19 UTC (permalink / raw)
To: linux-media; +Cc: hverkuil, Florian Echtler, Martin Kaltenbrunner
Closing the V4L2 device sometimes triggers a kernel oops.
Present patch fixes this.
Signed-off-by: Martin Kaltenbrunner <modin@yuri.at>
Signed-off-by: Florian Echtler <floe@butterbrot.org>
---
drivers/input/touchscreen/sur40.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 7b1052a1..38ebb24 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -448,7 +448,7 @@ static void sur40_process_video(struct sur40_state *sur40)
/* return error if streaming was stopped in the meantime */
if (sur40->sequence == -1)
- goto err_poll;
+ return;
/* mark as finished */
new_buf->vb.vb2_buf.timestamp = ktime_get_ns();
@@ -736,6 +736,7 @@ static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count)
static void sur40_stop_streaming(struct vb2_queue *vq)
{
struct sur40_state *sur40 = vb2_get_drv_priv(vq);
+ vb2_wait_for_all_buffers(vq);
sur40->sequence = -1;
/* Release all active buffers */
--
1.9.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 1/3] properly report a single frame rate of 60 FPS
2016-05-13 22:19 [PATCH 1/3] properly report a single frame rate of 60 FPS Florian Echtler
2016-05-13 22:19 ` [PATCH 2/3] lower poll interval to fix occasional FPS drops to ~56 FPS Florian Echtler
2016-05-13 22:19 ` [PATCH 3/3] fix occasional oopses on device close Florian Echtler
@ 2016-05-23 10:45 ` Hans Verkuil
2016-05-30 7:54 ` Florian Echtler
2 siblings, 1 reply; 5+ messages in thread
From: Hans Verkuil @ 2016-05-23 10:45 UTC (permalink / raw)
To: Florian Echtler, linux-media; +Cc: Martin Kaltenbrunner
On 05/14/2016 12:19 AM, Florian Echtler wrote:
> The device hardware is always running at 60 FPS, so report this both via
> PARM_IOCTL and ENUM_FRAMEINTERVALS.
>
> Signed-off-by: Martin Kaltenbrunner <modin@yuri.at>
> Signed-off-by: Florian Echtler <floe@butterbrot.org>
> ---
> drivers/input/touchscreen/sur40.c | 17 +++++++++++++++--
> 1 file changed, 15 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
> index 880c40b..fcc5934 100644
> --- a/drivers/input/touchscreen/sur40.c
> +++ b/drivers/input/touchscreen/sur40.c
> @@ -788,6 +788,16 @@ static int sur40_vidioc_fmt(struct file *file, void *priv,
> return 0;
> }
>
> +static int sur40_ioctl_parm(struct file *file, void *priv,
> + struct v4l2_streamparm *p)
> +{
> + if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
> + p->parm.capture.timeperframe.numerator = 1;
> + p->parm.capture.timeperframe.denominator = 60;
> + }
It should return -EINVAL if it is not of type VIDEO_CAPTURE. You should also set the
V4L2_CAP_TIMEPERFRAME capability for this to work. The readbuffers field should also
be set (typically to the minimum required number of buffers).
Please check with v4l2-compliance! It would have warned about these issues.
> + return 0;
> +}
> +
> static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
> struct v4l2_fmtdesc *f)
> {
> @@ -814,13 +824,13 @@ static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
> static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv,
> struct v4l2_frmivalenum *f)
> {
> - if ((f->index > 1) || (f->pixel_format != V4L2_PIX_FMT_GREY)
> + if ((f->index > 0) || (f->pixel_format != V4L2_PIX_FMT_GREY)
> || (f->width != sur40_video_format.width)
> || (f->height != sur40_video_format.height))
> return -EINVAL;
>
> f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
> - f->discrete.denominator = 60/(f->index+1);
> + f->discrete.denominator = 60;
> f->discrete.numerator = 1;
> return 0;
> }
> @@ -880,6 +890,9 @@ static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
> .vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
> .vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
>
> + .vidioc_g_parm = sur40_ioctl_parm,
> + .vidioc_s_parm = sur40_ioctl_parm,
> +
> .vidioc_enum_input = sur40_vidioc_enum_input,
> .vidioc_g_input = sur40_vidioc_g_input,
> .vidioc_s_input = sur40_vidioc_s_input,
>
Regards,
Hans
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/3] properly report a single frame rate of 60 FPS
2016-05-23 10:45 ` [PATCH 1/3] properly report a single frame rate of 60 FPS Hans Verkuil
@ 2016-05-30 7:54 ` Florian Echtler
0 siblings, 0 replies; 5+ messages in thread
From: Florian Echtler @ 2016-05-30 7:54 UTC (permalink / raw)
To: Hans Verkuil, linux-media; +Cc: Martin Kaltenbrunner
[-- Attachment #1.1: Type: text/plain, Size: 916 bytes --]
Hello Hans,
On 23.05.2016 12:45, Hans Verkuil wrote:
>> +static int sur40_ioctl_parm(struct file *file, void *priv,
>> + struct v4l2_streamparm *p)
>> +{
>> + if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
>> + p->parm.capture.timeperframe.numerator = 1;
>> + p->parm.capture.timeperframe.denominator = 60;
>> + }
>
> It should return -EINVAL if it is not of type VIDEO_CAPTURE. You should also set the
> V4L2_CAP_TIMEPERFRAME capability for this to work. The readbuffers field should also
> be set (typically to the minimum required number of buffers).
One question: should this be the same number of buffers as reported in
sur40_queue_setup (i.e. 3)? And is this still relevant with the pending
changes to alloc_ctx?
> Please check with v4l2-compliance! It would have warned about these issues.
Sorry for the noise (again ;-)
Best, Florian
--
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2016-05-13 22:19 [PATCH 1/3] properly report a single frame rate of 60 FPS Florian Echtler
2016-05-13 22:19 ` [PATCH 2/3] lower poll interval to fix occasional FPS drops to ~56 FPS Florian Echtler
2016-05-13 22:19 ` [PATCH 3/3] fix occasional oopses on device close Florian Echtler
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2016-05-30 7:54 ` Florian Echtler
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