[PATCH v13 13/21] media: tvp5150: add FORMAT_TRY support for get/set selection handlers

Marco Felsch
2020-03-12T10:32:42Z

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.felsch@pengutronix.de>
---
Changelog:

v13:
- fix tvp5150_get_hmax() sparse error

v11:
- s/__tvp5150_get_pad_crop/tvp5150_get_pad_crop/
- s/__tvp5150_set_selection/tvp5150_set_hw_selection/
- drop inline for tvp5150_set_hw_selection
- fix allignment issue

v10:
- __tvp5150_get_pad_crop: drop confusing fall-through
- set_selection: fix FORMAT_TRY handling if CONFIG_VIDEO_V4L2_SUBDEV_API
is disabled. Adapt sel->r and return 0.
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 | 113 ++++++++++++++++++++++++++----------
1 file changed, 81 insertions(+), 32 deletions(-)

diff --git a/drivers/media/i2c/tvp5150.c b/drivers/media/i2c/tvp5150.c
index 38f02c23e352..bb3752078bc1 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 +996,25 @@ 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);
+#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)
@@ -1019,17 +1039,51 @@ static int tvp5150_fill_fmt(struct v4l2_subdev *sd,
return 0;
}

+static 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 void tvp5150_set_hw_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",
@@ -1038,17 +1092,7 @@ static int tvp5150_set_selection(struct v4l2_subdev *sd,
/* 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 +1105,23 @@ 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);
+ if (!IS_ENABLED(CONFIG_VIDEO_V4L2_SUBDEV_API) &&
+ sel->which == V4L2_SUBDEV_FORMAT_TRY)
+ return 0;
+
+ crop = tvp5150_get_pad_crop(decoder, cfg, sel->pad, sel->which);
+ if (IS_ERR(crop))
+ return PTR_ERR(crop);
+
+ /*
+ * 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_hw_selection(sd, rect);

- decoder->rect = *rect;
+ *crop = *rect;

return 0;
}
@@ -1084,11 +1131,9 @@ 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 +1151,11 @@ 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;
--
2.20.1