linux-kernel - Re: [PATCH v2 5/6] media/usb/pvrusb2: Support for V4L2_CTRL_WHICH_DEF

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Date:	Thu, 29 Oct 2015 10:33:46 -0500 (CDT)
From:	Mike Isely <isely@...ly.net>
To:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
cc:	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Steven Toth <stoth@...nellabs.com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Vincent Palatin <vpalatin@...omium.org>,
	linux-media@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mike Isely at pobox <isely@...ox.com>
Subject: Re: [PATCH v2 5/6] media/usb/pvrusb2: Support for
 V4L2_CTRL_WHICH_DEF_VAL


Looks good to me (still), including now the change I had previously 
suggested.  For the record, the ack still applies.  (I guess you can 
consider this to be an ack of the ack...)

  -Mike


On Thu, 29 Oct 2015, Ricardo Ribalda Delgado wrote:

> This driver does not use the control infrastructure.
> Add support for the new field which on structure
>  v4l2_ext_controls
> 
> Acked-by: Mike Isely <isely@...ox.com>
> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
> ---
>  drivers/media/usb/pvrusb2/pvrusb2-v4l2.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
> index 1c5f85bf7ed4..81f788b7b242 100644
> --- a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
> +++ b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
> @@ -628,6 +628,7 @@ static int pvr2_g_ext_ctrls(struct file *file, void *priv,
>  	struct pvr2_v4l2_fh *fh = file->private_data;
>  	struct pvr2_hdw *hdw = fh->channel.mc_head->hdw;
>  	struct v4l2_ext_control *ctrl;
> +	struct pvr2_ctrl *cptr;
>  	unsigned int idx;
>  	int val;
>  	int ret;
> @@ -635,8 +636,15 @@ static int pvr2_g_ext_ctrls(struct file *file, void *priv,
>  	ret = 0;
>  	for (idx = 0; idx < ctls->count; idx++) {
>  		ctrl = ctls->controls + idx;
> -		ret = pvr2_ctrl_get_value(
> -				pvr2_hdw_get_ctrl_v4l(hdw, ctrl->id), &val);
> +		cptr = pvr2_hdw_get_ctrl_v4l(hdw, ctrl->id);
> +		if (cptr) {
> +			if (ctls->which == V4L2_CTRL_WHICH_DEF_VAL)
> +				pvr2_ctrl_get_def(cptr, &val);
> +			else
> +				ret = pvr2_ctrl_get_value(cptr, &val);
> +		} else
> +			ret = -EINVAL;
> +
>  		if (ret) {
>  			ctls->error_idx = idx;
>  			return ret;
> @@ -658,6 +666,10 @@ static int pvr2_s_ext_ctrls(struct file *file, void *priv,
>  	unsigned int idx;
>  	int ret;
>  
> +	/* Default value cannot be changed */
> +	if (ctls->which == V4L2_CTRL_WHICH_DEF_VAL)
> +		return -EINVAL;
> +
>  	ret = 0;
>  	for (idx = 0; idx < ctls->count; idx++) {
>  		ctrl = ctls->controls + idx;
> 

-- 

Mike Isely
isely @ isely (dot) net
PGP: 03 54 43 4D 75 E5 CC 92 71 16 01 E2 B5 F5 C1 E8
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