On 19-08-29 11:56, Hans Verkuil wrote:
> On 8/22/19 10:05 AM, Marco Felsch wrote:
> > Since commit 10d5509c8d50 ("[media] v4l2: remove g/s_crop from video ops")
> > the 'which' field for set/get_selection must be FORMAT_ACTIVE. There is
> > no way to try different selections. The patch adds a helper function to
> > select the correct selection memory space (sub-device file handle or
> > driver state) which will be set/returned.
> >
> > The selection rectangle is updated if the format is FORMAT_ACTIVE and
> > the rectangle position and/or size differs from the current set
> > rectangle.
> >
> > Signed-off-by: Marco Felsch <[email protected]>
> > ---
> > Changelog:
> >
> > v8:
> > - adapt commit message
> > - remove wrong FORMAT_TRY handling for tvp5150_fill_fmt() handling
> > - return 0 during set_selection if FORMAT_TRY was requested and
> > CONFIG_VIDEO_V4L2_SUBDEV_API is disabled
> > - return -EINVAL during get_selection if FORMAT_TRY was requested and
> > CONFIG_VIDEO_V4L2_SUBDEV_API is disabled
> > v7:
> > - __tvp5150_get_pad_crop(): return error on default case
> > - simplify __tvp5150_get_pad_crop() error handling
> > - tvp5150_set_selection() squash __tvp5150_set_selection() execution
> > conditions
> > v6:
> > nothing
> > v5:
> > - handle stub for v4l2_subdev_get_try_crop() internal since commit
> > ("media: v4l2-subdev: add stubs for v4l2_subdev_get_try_*")
> > isn't anymore part of this series.
> > - add error handling of __tvp5150_get_pad_crop()
> > v4:
> > - fix merge conflict due to rebase on top of media-tree/master
> > - __tvp5150_get_pad_crop(): cosmetic alignment fixes
> > ---
> > drivers/media/i2c/tvp5150.c | 111 +++++++++++++++++++++++++-----------
> > 1 file changed, 79 insertions(+), 32 deletions(-)
> >
> > diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
> > index 477a929d4f89..62a1c7c3a7c0 100644
> > --- a/drivers/media/i2c/tvp5150.c
> > +++ b/drivers/media/i2c/tvp5150.c
> > @@ -19,6 +19,7 @@
> > #include <media/v4l2-ctrls.h>
> > #include <media/v4l2-fwnode.h>
> > #include <media/v4l2-mc.h>
> > +#include <media/v4l2-rect.h>
> >
> > #include "tvp5150_reg.h"
> >
> > @@ -995,6 +996,23 @@ static void tvp5150_set_default(v4l2_std_id std,
> > struct v4l2_rect *crop)
> > crop->height = TVP5150_V_MAX_OTHERS;
> > }
> >
> > +static struct v4l2_rect *
> > +__tvp5150_get_pad_crop(struct tvp5150 *decoder,
> > + struct v4l2_subdev_pad_config *cfg, unsigned int pad,
> > + enum v4l2_subdev_format_whence which)
> > +{
> > + switch (which) {
> > + case V4L2_SUBDEV_FORMAT_ACTIVE:
> > + return &decoder->rect;
> > + case V4L2_SUBDEV_FORMAT_TRY:
> > +#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
> > + return v4l2_subdev_get_try_crop(&decoder->sd, cfg, pad);
> > +#endif
>
> Hmm, this fall-through is confusing.
>
> I'd just do:
>
> #else
> return ERR_PTR(-EINVAL);
> #endif
Okay.
> > + default:
> > + return ERR_PTR(-EINVAL);
> > + }
> > +}
> > +
> > static int tvp5150_fill_fmt(struct v4l2_subdev *sd,
> > struct v4l2_subdev_pad_config *cfg,
> > struct v4l2_subdev_format *format)
> > @@ -1019,36 +1037,68 @@ static int tvp5150_fill_fmt(struct v4l2_subdev *sd,
> > return 0;
> > }
> >
> > +unsigned int tvp5150_get_hmax(struct v4l2_subdev *sd)
> > +{
> > + struct tvp5150 *decoder = to_tvp5150(sd);
> > + v4l2_std_id std;
> > +
> > + /* Calculate height based on current standard */
> > + if (decoder->norm == V4L2_STD_ALL)
> > + std = tvp5150_read_std(sd);
> > + else
> > + std = decoder->norm;
> > +
> > + return (std & V4L2_STD_525_60) ?
> > + TVP5150_V_MAX_525_60 : TVP5150_V_MAX_OTHERS;
> > +}
> > +
> > +static inline void
> > +__tvp5150_set_selection(struct v4l2_subdev *sd, struct v4l2_rect rect)
> > +{
> > + struct tvp5150 *decoder = to_tvp5150(sd);
> > + unsigned int hmax = tvp5150_get_hmax(sd);
> > +
> > + regmap_write(decoder->regmap, TVP5150_VERT_BLANKING_START, rect.top);
> > + regmap_write(decoder->regmap, TVP5150_VERT_BLANKING_STOP,
> > + rect.top + rect.height - hmax);
> > + regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_ST_MSB,
> > + rect.left >> TVP5150_CROP_SHIFT);
> > + regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_ST_LSB,
> > + rect.left | (1 << TVP5150_CROP_SHIFT));
> > + regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_STP_MSB,
> > + (rect.left + rect.width - TVP5150_MAX_CROP_LEFT) >>
> > + TVP5150_CROP_SHIFT);
> > + regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_STP_LSB,
> > + rect.left + rect.width - TVP5150_MAX_CROP_LEFT);
> > +}
> > +
> > static int tvp5150_set_selection(struct v4l2_subdev *sd,
> > struct v4l2_subdev_pad_config *cfg,
> > struct v4l2_subdev_selection *sel)
> > {
> > struct tvp5150 *decoder = to_tvp5150(sd);
> > struct v4l2_rect rect = sel->r;
> > - v4l2_std_id std;
> > - int hmax;
> > + struct v4l2_rect *crop;
> > + unsigned int hmax;
> >
> > - if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
> > - sel->target != V4L2_SEL_TGT_CROP)
> > + if (sel->target != V4L2_SEL_TGT_CROP)
> > return -EINVAL;
> >
> > dev_dbg_lvl(sd->dev, 1, debug, "%s left=%d, top=%d, width=%d,
> > height=%d\n",
> > __func__, rect.left, rect.top, rect.width, rect.height);
> >
> > + /*
> > + * Do not apply the request in case of FORMAT_TRY and disabled
> > + * CONFIG_VIDEO_V4L2_SUBDEV_API support.
> > + */
> > + crop = __tvp5150_get_pad_crop(decoder, cfg, sel->pad, sel->which);
> > + if (IS_ERR(crop))
> > + return 0;
>
> This isn't right.
>
> If VIDEO_V4L2_SUBDEV_API isn't set, then set_selection with FORMAT_TRY
> should succeed: it should just verify (and optionally adjust) the selection
> against the current active format and return that.
Okay got that.
> I think the easiest would be to do this:
>
> #ifdef VIDEO_V4L2_SUBDEV_API
> crop = __tvp5150_get_pad_crop(decoder, cfg, sel->pad, sel->which);
> #else
> crop = __tvp5150_get_pad_crop(decoder, cfg, sel->pad,
> V4L2_SUBDEV_FORMAT_ACTIVE);
> #endif
Hm.. I think that's a bit to easy since we apply the rect to the crop so
we would apply the selection to the driver state. I changed the order of
set_selection in such a way to adapt the selection->rect first and
return 0 if VIDEO_V4L2_SUBDEV_API isn't available and sel->which was
V4L2_SUBDEV_FORMAT_TRY.
Futhermore I recognized that the set_selection didn't adapt the sel->r.
Instead the local copy is adapted... BTW. this isn't the only driver
which has that problem.. Should we add a compliance test here to cover
such problems during review?
Regards,
Marco
>
> > +
> > /* tvp5150 has some special limits */
> > rect.left = clamp(rect.left, 0, TVP5150_MAX_CROP_LEFT);
> > rect.top = clamp(rect.top, 0, TVP5150_MAX_CROP_TOP);
> > -
> > - /* Calculate height based on current standard */
> > - if (decoder->norm == V4L2_STD_ALL)
> > - std = tvp5150_read_std(sd);
> > - else
> > - std = decoder->norm;
> > -
> > - if (std & V4L2_STD_525_60)
> > - hmax = TVP5150_V_MAX_525_60;
> > - else
> > - hmax = TVP5150_V_MAX_OTHERS;
> > + hmax = tvp5150_get_hmax(sd);
> >
> > /*
> > * alignments:
> > @@ -1061,20 +1111,15 @@ static int tvp5150_set_selection(struct v4l2_subdev
> > *sd,
> > hmax - TVP5150_MAX_CROP_TOP - rect.top,
> > hmax - rect.top, 0, 0);
> >
> > - regmap_write(decoder->regmap, TVP5150_VERT_BLANKING_START, rect.top);
> > - regmap_write(decoder->regmap, TVP5150_VERT_BLANKING_STOP,
> > - rect.top + rect.height - hmax);
> > - regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_ST_MSB,
> > - rect.left >> TVP5150_CROP_SHIFT);
> > - regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_ST_LSB,
> > - rect.left | (1 << TVP5150_CROP_SHIFT));
> > - regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_STP_MSB,
> > - (rect.left + rect.width - TVP5150_MAX_CROP_LEFT) >>
> > - TVP5150_CROP_SHIFT);
> > - regmap_write(decoder->regmap, TVP5150_ACT_VD_CROP_STP_LSB,
> > - rect.left + rect.width - TVP5150_MAX_CROP_LEFT);
> > + /*
> > + * Update output image size if the selection (crop) rectangle size or
> > + * position has been modified.
> > + */
> > + if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE &&
> > + !v4l2_rect_equal(&rect, crop))
> > + __tvp5150_set_selection(sd, rect);
> >
> > - decoder->rect = rect;
> > + *crop = rect;
> >
> > return 0;
> > }
> > @@ -1084,11 +1129,9 @@ static int tvp5150_get_selection(struct v4l2_subdev
> > *sd,
> > struct v4l2_subdev_selection *sel)
> > {
> > struct tvp5150 *decoder = container_of(sd, struct tvp5150, sd);
> > + struct v4l2_rect *crop;
> > v4l2_std_id std;
> >
> > - if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
> > - return -EINVAL;
> > -
> > switch (sel->target) {
> > case V4L2_SEL_TGT_CROP_BOUNDS:
> > sel->r.left = 0;
> > @@ -1106,7 +1149,11 @@ static int tvp5150_get_selection(struct v4l2_subdev
> > *sd,
> > sel->r.height = TVP5150_V_MAX_OTHERS;
> > return 0;
> > case V4L2_SEL_TGT_CROP:
> > - sel->r = decoder->rect;
> > + crop = __tvp5150_get_pad_crop(decoder, cfg, sel->pad,
> > + sel->which);
> > + if (IS_ERR(crop))
> > + return PTR_ERR(crop);
> > + sel->r = *crop;
> > return 0;
> > default:
> > return -EINVAL;
> >
>
> Regards,
>
> Hans
>
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