[PATCH v2 2/8] v4l: vsp1: Share the CLU, LIF and LUT set_fmt pad operation code
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Sat Apr 28 16:07:47 UTC 2018
Hi Jacopo,
On Saturday, 28 April 2018 12:50:48 EEST jacopo mondi wrote:
> Hi Laurent,
> very minor comments below
>
> On Mon, Apr 23, 2018 at 01:34:24AM +0300, Laurent Pinchart wrote:
> > The implementation of the set_fmt pad operation is identical in the
> > three modules. Move it to a generic helper function.
> >
> > Signed-off-by: Laurent Pinchart
> > <laurent.pinchart+renesas at ideasonboard.com>
> > ---
> >
> > drivers/media/platform/vsp1/vsp1_clu.c | 65 +++++--------------------
> > drivers/media/platform/vsp1/vsp1_entity.c | 75 ++++++++++++++++++++++++++
> > drivers/media/platform/vsp1/vsp1_entity.h | 6 +++
> > drivers/media/platform/vsp1/vsp1_lif.c | 65 +++++--------------------
> > drivers/media/platform/vsp1/vsp1_lut.c | 65 +++++--------------------
> > 5 files changed, 116 insertions(+), 160 deletions(-)
> >
> > diff --git a/drivers/media/platform/vsp1/vsp1_clu.c
> > b/drivers/media/platform/vsp1/vsp1_clu.c index 9626b6308585..96a448e1504c
> > 100644
> > --- a/drivers/media/platform/vsp1/vsp1_clu.c
> > +++ b/drivers/media/platform/vsp1/vsp1_clu.c
> > @@ -114,18 +114,18 @@ static const struct v4l2_ctrl_config
> > clu_mode_control = {
> > * V4L2 Subdevice Pad Operations
> > */
> >
> > +static const unsigned int clu_codes[] = {
> > + MEDIA_BUS_FMT_ARGB8888_1X32,
> > + MEDIA_BUS_FMT_AHSV8888_1X32,
> > + MEDIA_BUS_FMT_AYUV8_1X32,
> > +};
> > +
> > static int clu_enum_mbus_code(struct v4l2_subdev *subdev,
> > struct v4l2_subdev_pad_config *cfg,
> > struct v4l2_subdev_mbus_code_enum *code)
> > {
> > - static const unsigned int codes[] = {
> > - MEDIA_BUS_FMT_ARGB8888_1X32,
> > - MEDIA_BUS_FMT_AHSV8888_1X32,
> > - MEDIA_BUS_FMT_AYUV8_1X32,
> > - };
> > -
> > - return vsp1_subdev_enum_mbus_code(subdev, cfg, code, codes,
> > - ARRAY_SIZE(codes));
> > + return vsp1_subdev_enum_mbus_code(subdev, cfg, code, clu_codes,
> > + ARRAY_SIZE(clu_codes));
> > }
> >
> > static int clu_enum_frame_size(struct v4l2_subdev *subdev,
> > @@ -141,51 +141,10 @@ static int clu_set_format(struct v4l2_subdev
> > *subdev,
> > struct v4l2_subdev_pad_config *cfg,
> > struct v4l2_subdev_format *fmt)
> > {
> > - struct vsp1_clu *clu = to_clu(subdev);
> > - struct v4l2_subdev_pad_config *config;
> > - struct v4l2_mbus_framefmt *format;
> > - int ret = 0;
> > -
> > - mutex_lock(&clu->entity.lock);
> > -
> > - config = vsp1_entity_get_pad_config(&clu->entity, cfg, fmt->which);
> > - if (!config) {
> > - ret = -EINVAL;
> > - goto done;
> > - }
> > -
> > - /* Default to YUV if the requested format is not supported. */
> > - if (fmt->format.code != MEDIA_BUS_FMT_ARGB8888_1X32 &&
> > - fmt->format.code != MEDIA_BUS_FMT_AHSV8888_1X32 &&
> > - fmt->format.code != MEDIA_BUS_FMT_AYUV8_1X32)
> > - fmt->format.code = MEDIA_BUS_FMT_AYUV8_1X32;
>
> The newly implemented vsp1_subdev_set_pad_format defaults to the first
> clu_codes[] member (ARGB888_1x32), while here the code chose the AYUV8_1x32
> format. Is it ok? Should you revers the clu_codes[] order?
But that would then change the order of the format enumeration.
I don't think it's a big deal, the change here will only affect the format
returned if userspace tries to pick a format that is not supported (and thus
not returned by the enumeration). This shouldn't happen in the first place,
and if it does, the driver has never guaranteed that a specific format would
be returned.
> > -
> > - format = vsp1_entity_get_pad_format(&clu->entity, config, fmt->pad);
> > -
> > - if (fmt->pad == CLU_PAD_SOURCE) {
> > - /* The CLU output format can't be modified. */
> > - fmt->format = *format;
> > - goto done;
> > - }
> > -
> > - format->code = fmt->format.code;
> > - format->width = clamp_t(unsigned int, fmt->format.width,
> > - CLU_MIN_SIZE, CLU_MAX_SIZE);
> > - format->height = clamp_t(unsigned int, fmt->format.height,
> > - CLU_MIN_SIZE, CLU_MAX_SIZE);
> > - format->field = V4L2_FIELD_NONE;
> > - format->colorspace = V4L2_COLORSPACE_SRGB;
> > -
> > - fmt->format = *format;
> > -
> > - /* Propagate the format to the source pad. */
> > - format = vsp1_entity_get_pad_format(&clu->entity, config,
> > - CLU_PAD_SOURCE);
> > - *format = fmt->format;
> > -
> > -done:
> > - mutex_unlock(&clu->entity.lock);
> > - return ret;
> > + return vsp1_subdev_set_pad_format(subdev, cfg, fmt, clu_codes,
> > + ARRAY_SIZE(clu_codes),
> > + CLU_MIN_SIZE, CLU_MIN_SIZE,
> > + CLU_MAX_SIZE, CLU_MAX_SIZE);
> > }
> >
> > /* ----------------------------------------------------------------------
> > diff --git a/drivers/media/platform/vsp1/vsp1_entity.c
> > b/drivers/media/platform/vsp1/vsp1_entity.c index
> > 72354caf5746..239df047efd0 100644
> > --- a/drivers/media/platform/vsp1/vsp1_entity.c
> > +++ b/drivers/media/platform/vsp1/vsp1_entity.c
> > @@ -307,6 +307,81 @@ int vsp1_subdev_enum_frame_size(struct v4l2_subdev
> > *subdev,
> > return ret;
> > }
> >
> > +/*
> > + * vsp1_subdev_set_pad_format - Subdev pad set_fmt handler
> > + * @subdev: V4L2 subdevice
> > + * @cfg: V4L2 subdev pad configuration
> > + * @fmt: V4L2 subdev format
> > + * @codes: Array of supported media bus codes
> > + * @ncodes: Number of supported media bus codes
> > + * @min_width: Minimum image width
> > + * @min_height: Minimum image height
> > + * @max_width: Maximum image width
> > + * @max_height: Maximum image height
> > + *
> > + * This function implements the subdev set_fmt pad operation for entities
> > that
> > + * do not support scaling or cropping. It defaults to the first supplied
> > media
> > + * bus code if the requested code isn't supported, clamps the size to the
> > + * supplied minimum and maximum, and propagates the sink pad format to
> > the
> > + * source pad.
> > + */
> > +int vsp1_subdev_set_pad_format(struct v4l2_subdev *subdev,
> > + struct v4l2_subdev_pad_config *cfg,
> > + struct v4l2_subdev_format *fmt,
> > + const unsigned int *codes, unsigned int ncodes,
> > + unsigned int min_width, unsigned int min_height,
> > + unsigned int max_width, unsigned int max_height)
> > +{
> > + struct vsp1_entity *entity = to_vsp1_entity(subdev);
> > + struct v4l2_subdev_pad_config *config;
> > + struct v4l2_mbus_framefmt *format;
> > + unsigned int i;
> > + int ret = 0;
> > +
> > + mutex_lock(&entity->lock);
> > +
> > + config = vsp1_entity_get_pad_config(entity, cfg, fmt->which);
> > + if (!config) {
> > + ret = -EINVAL;
> > + goto done;
> > + }
> > +
> > + format = vsp1_entity_get_pad_format(entity, config, fmt->pad);
> > +
> > + if (fmt->pad != 0) {
>
> This assumes the SINK pad is always 0, which indeed is the case for
> CLU, LIF and LUT entities.
>
> > + /* The output format can't be modified. */
> > + fmt->format = *format;
> > + goto done;
> > + }
> > +
> > + /*
> > + * Default to the first media bus code if the requested format is not
> > + * supported.
> > + */
> > + for (i = 0; i < ncodes; ++i) {
> > + if (fmt->format.code == codes[i])
> > + break;
> > + }
>
> Braces not needed?
Not strictly required but I find it more readable.
> > +
> > + format->code = i < ncodes ? codes[i] : codes[0];
> > + format->width = clamp_t(unsigned int, fmt->format.width,
> > + min_width, max_width);
> > + format->height = clamp_t(unsigned int, fmt->format.height,
> > + min_height, max_height);
> > + format->field = V4L2_FIELD_NONE;
> > + format->colorspace = V4L2_COLORSPACE_SRGB;
> > +
> > + fmt->format = *format;
> > +
> > + /* Propagate the format to the source pad. */
> > + format = vsp1_entity_get_pad_format(entity, config, 1);
> > + *format = fmt->format;
> > +
> > +done:
> > + mutex_unlock(&entity->lock);
> > + return ret;
> > +}
[snip]
--
Regards,
Laurent Pinchart
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