From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Date: Tue, 21 May 2013 14:28:08 +0000 Subject: Re: [PATCH v3] adv7180: add more subdev video ops Message-Id: <519B8478.9010305@cogentembedded.com> List-Id: References: <201305132321.39495.sergei.shtylyov@cogentembedded.com> <201305211135.59706.hverkuil@xs4all.nl> In-Reply-To: <201305211135.59706.hverkuil@xs4all.nl> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Hans Verkuil Cc: mchehab@redhat.com, linux-media@vger.kernel.org, vladimir.barinov@cogentembedded.com, linux-sh@vger.kernel.org, matsu@igel.co.jp Hello. On 21-05-2013 13:35, Hans Verkuil wrote: >> From: Vladimir Barinov >> Add subdev video ops for ADV7180 video decoder. This makes decoder usable on >> the soc-camera drivers. >> Signed-off-by: Vladimir Barinov >> Signed-off-by: Sergei Shtylyov >> --- >> This patch is against the 'media_tree.git' repo. >> Changes from version 2: >> - set the field format depending on video standard in try_mbus_fmt() method; >> - removed querystd() method calls from try_mbus_fmt() and cropcap() methods; >> - removed g_crop() method. >> drivers/media/i2c/adv7180.c | 86 ++++++++++++++++++++++++++++++++++++++++++++ >> 1 file changed, 86 insertions(+) >> >> Index: media_tree/drivers/media/i2c/adv7180.c >> =================================>> --- media_tree.orig/drivers/media/i2c/adv7180.c >> +++ media_tree/drivers/media/i2c/adv7180.c >> + >> +static int adv7180_try_mbus_fmt(struct v4l2_subdev *sd, >> + struct v4l2_mbus_framefmt *fmt) >> +{ >> + struct adv7180_state *state = to_state(sd); >> + >> + fmt->code = V4L2_MBUS_FMT_YUYV8_2X8; >> + fmt->colorspace = V4L2_COLORSPACE_SMPTE170M; >> + fmt->field = state->curr_norm & V4L2_STD_525_60 ? >> + V4L2_FIELD_INTERLACED_BT : V4L2_FIELD_INTERLACED_TB; > Just noticed this: use V4L2_FIELD_INTERLACED as that does the right thing. > No need to split in _BT and _TB. Hm, testers have reported that _BT vs _TB do make a difference. I'll try to look into how V4L2 handles interlacing for different standards. >> + fmt->width = 720; >> + fmt->height = state->curr_norm & V4L2_STD_525_60 ? 480 : 576; >> + >> + return 0; >> +} > Actually, all this code can be simplified substantially: the try/g/s_mbus_fmt > functions are really all identical since the data returned is only dependent > on the current standard. So this means you can use just a single function for > all three ops, and you can do away with adding struct v4l2_mbus_framefmt to > adv7180_state. Hm, I wonder how "get" and "set" methods can be identical... I'll look into this some more. > Regards, > Hans WBR, Sergei