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 <m.fel...@pengutronix.de>
> ---
> 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
> + 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.
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
> +
> /* 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
