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Date: Mon, 7 Oct 2019 23:00:54 -0300
From: Helen Koike <helen.koike@...labora.com>
To: Nícolas F. R. A. Prado
<nfraprado@...tonmail.com>, linux-media@...r.kernel.org
Cc: Shuah Khan <skhan@...uxfoundation.org>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Hans Verkuil <hverkuil@...all.nl>,
linux-kernel@...r.kernel.org, lkcamp@...ts.libreplanetbr.org
Subject: Re: [PATCH] media: vimc: Make capture devices and subdevices use
different link_validates
On 10/6/19 9:42 PM, Helen Koike wrote:
> Hi Nícolas,
>
> Thanks for you patch, just some small comments below.
>
> On 10/6/19 4:14 PM, Nícolas F. R. A. Prado wrote:
>> Instead of validating the links to capture devices and subdevices with
>> the same function, use the default v4l function for links between
>> subdevices and only use a different function for validating between
>> capture device and subdevice.
>> This change should also ease future work to associate multiple mbus
>> codes for the same pixelformat in vimc_pix_map.
>>
>> These changes were tested with
>> v4l2-compliance SHA: 3f806630e2ecbcebe31872b865c5c4b42f111a99, 64 bits
>> and passed all tests:
>> Grand Total for vimc device /dev/media0: 451, Succeeded: 451, Failed: 0, Warnings: 0
>>
>> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@...tonmail.com>
>> ---
>> drivers/media/platform/vimc/vimc-capture.c | 78 +++++++++++++++-
>> drivers/media/platform/vimc/vimc-common.c | 103 ++++-----------------
>> drivers/media/platform/vimc/vimc-common.h | 3 +
>> 3 files changed, 96 insertions(+), 88 deletions(-)
>>
>> diff --git a/drivers/media/platform/vimc/vimc-capture.c b/drivers/media/platform/vimc/vimc-capture.c
>> index 602f80323031..924b99f82123 100644
>> --- a/drivers/media/platform/vimc/vimc-capture.c
>> +++ b/drivers/media/platform/vimc/vimc-capture.c
>> @@ -321,8 +321,84 @@ static const struct vb2_ops vimc_cap_qops = {
>> .wait_finish = vb2_ops_wait_finish,
>> };
>>
>> +int vimc_cap_link_validate(struct media_link *link)
>
> This function is only used inside the capture, it could be static.
Actually, I was thinking that it is maybe better to leave this function in
vimc-common and rename it to vimc_vdev_link_validate(), as it is generic
to any video_device, and we also avoid to moving it to from vimc-common to
vimc-cap and back to vimc-common again if we add other video devices.
Regards,
Helen
>
> Unless if you want to make it a generic function in vimc-common.h, so the future
> output device could use it as well, but it can be done in the output patch.
>
>
>> +{
>> + struct v4l2_pix_format source_fmt, sink_fmt;
>> + int ret;
>> +
>> + ret = vimc_get_pix_format(link->source, &source_fmt);
>> + if (ret)
>> + return ret;
>> +
>> + ret = vimc_get_pix_format(link->sink, &sink_fmt);
>> + if (ret)
>> + return ret;
>> +
>> + pr_info("vimc link validate: "
>> + "%s:src:%dx%d (0x%x, %d, %d, %d, %d) "
>> + "%s:snk:%dx%d (0x%x, %d, %d, %d, %d)\n",
>> + /* src */
>> + link->source->entity->name,
>> + source_fmt.width, source_fmt.height,
>> + source_fmt.pixelformat, source_fmt.colorspace,
>> + source_fmt.quantization, source_fmt.xfer_func,
>> + source_fmt.ycbcr_enc,
>> + /* sink */
>> + link->sink->entity->name,
>> + sink_fmt.width, sink_fmt.height,
>> + sink_fmt.pixelformat, sink_fmt.colorspace,
>> + sink_fmt.quantization, sink_fmt.xfer_func,
>> + sink_fmt.ycbcr_enc);
>> +
>> + /* The width, height and pixelformat must match. */
>> + if (source_fmt.width != sink_fmt.width
>> + || source_fmt.height != sink_fmt.height
>> + || source_fmt.pixelformat != sink_fmt.pixelformat)
>> + return -EPIPE;
>> +
>> + /*
>> + * The field order must match, or the sink field order must be NONE
>> + * to support interlaced hardware connected to bridges that support
>> + * progressive formats only.
>> + */
>> + if (source_fmt.field != sink_fmt.field &&
>> + sink_fmt.field != V4L2_FIELD_NONE)
>> + return -EPIPE;
>> +
>> + /*
>> + * If colorspace is DEFAULT, then assume all the colorimetry is also
>> + * DEFAULT, return 0 to skip comparing the other colorimetry parameters
>> + */
>> + if (source_fmt.colorspace == V4L2_COLORSPACE_DEFAULT
>> + || sink_fmt.colorspace == V4L2_COLORSPACE_DEFAULT)
>> + return 0;
>> +
>> + /* Colorspace must match. */
>> + if (source_fmt.colorspace != sink_fmt.colorspace)
>> + return -EPIPE;
>> +
>> + /* Colorimetry must match if they are not set to DEFAULT */
>> + if (source_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT
>> + && sink_fmt.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT
>> + && source_fmt.ycbcr_enc != sink_fmt.ycbcr_enc)
>> + return -EPIPE;
>> +
>> + if (source_fmt.quantization != V4L2_QUANTIZATION_DEFAULT
>> + && sink_fmt.quantization != V4L2_QUANTIZATION_DEFAULT
>> + && source_fmt.quantization != sink_fmt.quantization)
>> + return -EPIPE;
>> +
>> + if (source_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT
>> + && sink_fmt.xfer_func != V4L2_XFER_FUNC_DEFAULT
>> + && source_fmt.xfer_func != sink_fmt.xfer_func)
>> + return -EPIPE;
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(vimc_cap_link_validate);
>
> No need to export it here.
>
>> +
>> static const struct media_entity_operations vimc_cap_mops = {
>> - .link_validate = vimc_link_validate,
>> + .link_validate = vimc_cap_link_validate,
>> };
>>
>> static void vimc_cap_release(struct video_device *vdev)
>> diff --git a/drivers/media/platform/vimc/vimc-common.c b/drivers/media/platform/vimc/vimc-common.c
>> index a3120f4f7a90..fe91d67811e5 100644
>> --- a/drivers/media/platform/vimc/vimc-common.c
>> +++ b/drivers/media/platform/vimc/vimc-common.c
>> @@ -247,35 +247,40 @@ int vimc_pipeline_s_stream(struct media_entity *ent, int enable)
>> }
>> EXPORT_SYMBOL_GPL(vimc_pipeline_s_stream);
>>
>> -static int vimc_get_mbus_format(struct media_pad *pad,
>> - struct v4l2_subdev_format *fmt)
>> +int vimc_get_pix_format(struct media_pad *pad,
>> + struct v4l2_pix_format *fmt)
>
> Could you align the arguments please?
>
>> {
>> if (is_media_entity_v4l2_subdev(pad->entity)) {
>> struct v4l2_subdev *sd =
>> media_entity_to_v4l2_subdev(pad->entity);
>> + struct v4l2_subdev_format sd_fmt;
>> + const struct vimc_pix_map *pix_map;
>> int ret;
>>
>> - fmt->which = V4L2_SUBDEV_FORMAT_ACTIVE;
>> - fmt->pad = pad->index;
>> + sd_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
>> + sd_fmt.pad = pad->index;
>> +
>> + ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &sd_fmt);
>>
>
> Please remove this blank line, so that the error check follows the function.
>
>> - ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, fmt);
>> if (ret)
>> return ret;
>>
>> + v4l2_fill_pix_format(fmt, &sd_fmt.format);
>> +
>
> No need for this blank line.
>
>> + pix_map = vimc_pix_map_by_code(sd_fmt.format.code);
>> + fmt->pixelformat = pix_map->pixelformat;
>> +
>
> Could you also remove this blank like?
>
>> } else if (is_media_entity_v4l2_video_device(pad->entity)) {
>> struct video_device *vdev = container_of(pad->entity,
>> struct video_device,
>> entity);
>> struct vimc_ent_device *ved = video_get_drvdata(vdev);
>> - const struct vimc_pix_map *vpix;
>> - struct v4l2_pix_format vdev_fmt;
>>
>> if (!ved->vdev_get_format)
>> return -ENOIOCTLCMD;
>>
>> - ved->vdev_get_format(ved, &vdev_fmt);
>> - vpix = vimc_pix_map_by_pixelformat(vdev_fmt.pixelformat);
>> - v4l2_fill_mbus_format(&fmt->format, &vdev_fmt, vpix->code);
>> + ved->vdev_get_format(ved, fmt);
>> +
>
> And this one too.
>
>> } else {
>> return -EINVAL;
>> }
>> @@ -283,84 +288,8 @@ static int vimc_get_mbus_format(struct media_pad *pad,
>> return 0;
>> }
>>
>> -int vimc_link_validate(struct media_link *link)
>> -{
>> - struct v4l2_subdev_format source_fmt, sink_fmt;
>> - int ret;
>> -
>> - ret = vimc_get_mbus_format(link->source, &source_fmt);
>> - if (ret)
>> - return ret;
>> -
>> - ret = vimc_get_mbus_format(link->sink, &sink_fmt);
>> - if (ret)
>> - return ret;
>> -
>> - pr_info("vimc link validate: "
>> - "%s:src:%dx%d (0x%x, %d, %d, %d, %d) "
>> - "%s:snk:%dx%d (0x%x, %d, %d, %d, %d)\n",
>> - /* src */
>> - link->source->entity->name,
>> - source_fmt.format.width, source_fmt.format.height,
>> - source_fmt.format.code, source_fmt.format.colorspace,
>> - source_fmt.format.quantization, source_fmt.format.xfer_func,
>> - source_fmt.format.ycbcr_enc,
>> - /* sink */
>> - link->sink->entity->name,
>> - sink_fmt.format.width, sink_fmt.format.height,
>> - sink_fmt.format.code, sink_fmt.format.colorspace,
>> - sink_fmt.format.quantization, sink_fmt.format.xfer_func,
>> - sink_fmt.format.ycbcr_enc);
>> -
>> - /* The width, height and code must match. */
>> - if (source_fmt.format.width != sink_fmt.format.width
>> - || source_fmt.format.height != sink_fmt.format.height
>> - || source_fmt.format.code != sink_fmt.format.code)
>> - return -EPIPE;
>> -
>> - /*
>> - * The field order must match, or the sink field order must be NONE
>> - * to support interlaced hardware connected to bridges that support
>> - * progressive formats only.
>> - */
>> - if (source_fmt.format.field != sink_fmt.format.field &&
>> - sink_fmt.format.field != V4L2_FIELD_NONE)
>> - return -EPIPE;
>> -
>> - /*
>> - * If colorspace is DEFAULT, then assume all the colorimetry is also
>> - * DEFAULT, return 0 to skip comparing the other colorimetry parameters
>> - */
>> - if (source_fmt.format.colorspace == V4L2_COLORSPACE_DEFAULT
>> - || sink_fmt.format.colorspace == V4L2_COLORSPACE_DEFAULT)
>> - return 0;
>> -
>> - /* Colorspace must match. */
>> - if (source_fmt.format.colorspace != sink_fmt.format.colorspace)
>> - return -EPIPE;
>> -
>> - /* Colorimetry must match if they are not set to DEFAULT */
>> - if (source_fmt.format.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT
>> - && sink_fmt.format.ycbcr_enc != V4L2_YCBCR_ENC_DEFAULT
>> - && source_fmt.format.ycbcr_enc != sink_fmt.format.ycbcr_enc)
>> - return -EPIPE;
>> -
>> - if (source_fmt.format.quantization != V4L2_QUANTIZATION_DEFAULT
>> - && sink_fmt.format.quantization != V4L2_QUANTIZATION_DEFAULT
>> - && source_fmt.format.quantization != sink_fmt.format.quantization)
>> - return -EPIPE;
>> -
>> - if (source_fmt.format.xfer_func != V4L2_XFER_FUNC_DEFAULT
>> - && sink_fmt.format.xfer_func != V4L2_XFER_FUNC_DEFAULT
>> - && source_fmt.format.xfer_func != sink_fmt.format.xfer_func)
>> - return -EPIPE;
>> -
>> - return 0;
>> -}
>> -EXPORT_SYMBOL_GPL(vimc_link_validate);
>> -
>> static const struct media_entity_operations vimc_ent_sd_mops = {
>> - .link_validate = vimc_link_validate,
>> + .link_validate = v4l2_subdev_link_validate,
>> };
>>
>> int vimc_ent_sd_register(struct vimc_ent_device *ved,
>> diff --git a/drivers/media/platform/vimc/vimc-common.h b/drivers/media/platform/vimc/vimc-common.h
>> index 698db7c07645..8a4310430292 100644
>> --- a/drivers/media/platform/vimc/vimc-common.h
>> +++ b/drivers/media/platform/vimc/vimc-common.h
>> @@ -263,6 +263,9 @@ int vimc_ent_sd_register(struct vimc_ent_device *ved,
>> void vimc_ent_sd_unregister(struct vimc_ent_device *ved,
>> struct v4l2_subdev *sd);
>>
>> +
>> +int vimc_get_pix_format(struct media_pad *pad, struct v4l2_pix_format *fmt);
>> +
>
> You don't need this if you make the function static.
>
>> /**
>> * vimc_link_validate - validates a media link
>> *
>>
>
>
> Thanks!
> Helen
>
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