lkml.org 
[lkml]   [2018]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH] media: stm32-dcmi: add g/s_parm framerate support
Date
Thanks Hans,
v2 sent, rebased on your helpers !
Best regards,
Hugues.

On 02/07/2018 06:52 PM, Hans Verkuil wrote:
> On 02/07/2018 06:43 PM, Hugues Fruchet wrote:
>> Add g/s_parm framerate support by calling subdev
>> g/s_frame_interval ops.
>> This allows user to control sensor framerate by
>> calling ioctl G/S_PARM.
>>
>> Signed-off-by: Hugues Fruchet <hugues.fruchet@st.com>
>> ---
>> drivers/media/platform/stm32/stm32-dcmi.c | 49 +++++++++++++++++++++++++++++++
>> 1 file changed, 49 insertions(+)
>>
>> diff --git a/drivers/media/platform/stm32/stm32-dcmi.c b/drivers/media/platform/stm32/stm32-dcmi.c
>> index ab555d4..8197554 100644
>> --- a/drivers/media/platform/stm32/stm32-dcmi.c
>> +++ b/drivers/media/platform/stm32/stm32-dcmi.c
>> @@ -1151,6 +1151,52 @@ static int dcmi_enum_framesizes(struct file *file, void *fh,
>> return 0;
>> }
>>
>> +static int dcmi_g_parm(struct file *file, void *priv,
>> + struct v4l2_streamparm *p)
>> +{
>> + struct stm32_dcmi *dcmi = video_drvdata(file);
>> + struct v4l2_subdev_frame_interval ival = { 0 };
>> + int ret;
>> +
>> + if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
>> + return -EINVAL;
>> +
>> + p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
>> + ret = v4l2_subdev_call(dcmi->entity.subdev, video,
>> + g_frame_interval, &ival);
>> + if (ret)
>> + return ret;
>> +
>> + p->parm.capture.timeperframe = ival.interval;
>> +
>> + return ret;
>> +}
>
> This function and the next can be simplified by using the help functions
> introduced here:
>
> https://git.linuxtv.org/hverkuil/media_tree.git/log/?h=parm
>
> I'll make a pull request for this later this week, so it's probably a good
> idea to base your code on this as well.
>
> Regards,
>
> Hans
>
>> +
>> +static int dcmi_s_parm(struct file *file, void *priv,
>> + struct v4l2_streamparm *p)
>> +{
>> + struct stm32_dcmi *dcmi = video_drvdata(file);
>> + struct v4l2_subdev_frame_interval ival = {
>> + 0,
>> + p->parm.capture.timeperframe
>> + };
>> + int ret;
>> +
>> + if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
>> + return -EINVAL;
>> +
>> + memset(&p->parm, 0, sizeof(p->parm));
>> + p->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
>> + ret = v4l2_subdev_call(dcmi->entity.subdev, video,
>> + s_frame_interval, &ival);
>> + if (ret)
>> + return ret;
>> +
>> + p->parm.capture.timeperframe = ival.interval;
>> +
>> + return ret;
>> +}
>> +
>> static int dcmi_enum_frameintervals(struct file *file, void *fh,
>> struct v4l2_frmivalenum *fival)
>> {
>> @@ -1253,6 +1299,9 @@ static int dcmi_release(struct file *file)
>> .vidioc_g_input = dcmi_g_input,
>> .vidioc_s_input = dcmi_s_input,
>>
>> + .vidioc_g_parm = dcmi_g_parm,
>> + .vidioc_s_parm = dcmi_s_parm,
>> +
>> .vidioc_enum_framesizes = dcmi_enum_framesizes,
>> .vidioc_enum_frameintervals = dcmi_enum_frameintervals,
>>
>>
>
\
 
 \ /
  Last update: 2018-02-08 12:04    [W:0.068 / U:0.624 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site