Hi Sakari,
On Thu, Sep 26, 2024 at 4:49 PM Sakari Ailus
<sakari.ailus@xxxxxxxxxxxxxxx> wrote:
>
> Hi Laurent, Prabhakar,
>
> On Wed, Sep 25, 2024 at 07:21:53PM +0300, Laurent Pinchart wrote:
> > Hi Prabhakar,
> >
> > Thank you for the patch.
> >
> > On Tue, Sep 10, 2024 at 06:06:08PM +0100, Prabhakar wrote:
> > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> > >
> > > Use the newly added internal pad API to expose the internal
> > > configuration of the sensor to userspace in a standard manner.
> > >
> > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> > > ---
> > > drivers/media/i2c/ov5645.c | 107 +++++++++++++++++++++++++++----------
> > > 1 file changed, 79 insertions(+), 28 deletions(-)
> > >
> > > diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c
> > > index dc93514608ee..255c6395a268 100644
> > > --- a/drivers/media/i2c/ov5645.c
> > > +++ b/drivers/media/i2c/ov5645.c
> > > @@ -60,6 +60,10 @@
> > > #define OV5645_SDE_SAT_U 0x5583
> > > #define OV5645_SDE_SAT_V 0x5584
> > >
> > > +#define OV5645_NATIVE_FORMAT MEDIA_BUS_FMT_SBGGR8_1X8
> > > +#define OV5645_NATIVE_WIDTH 2592
> > > +#define OV5645_NATIVE_HEIGHT 1944
> > > +
> > > /* regulator supplies */
> > > static const char * const ov5645_supply_name[] = {
> > > "vdddo", /* Digital I/O (1.8V) supply */
> > > @@ -69,6 +73,12 @@ static const char * const ov5645_supply_name[] = {
> > >
> > > #define OV5645_NUM_SUPPLIES ARRAY_SIZE(ov5645_supply_name)
> > >
> > > +enum ov5645_pad_ids {
> > > + OV5645_PAD_SOURCE,
> > > + OV5645_PAD_IMAGE,
> > > + OV5645_NUM_PADS,
> > > +};
> > > +
> > > struct reg_value {
> > > u16 reg;
> > > u8 val;
> > > @@ -87,7 +97,7 @@ struct ov5645 {
> > > struct i2c_client *i2c_client;
> > > struct device *dev;
> > > struct v4l2_subdev sd;
> > > - struct media_pad pad;
> > > + struct media_pad pads[OV5645_NUM_PADS];
> > > struct v4l2_fwnode_endpoint ep;
> > > struct v4l2_rect crop;
> > > struct clk *xclk;
> > > @@ -826,7 +836,10 @@ static int ov5645_enum_mbus_code(struct v4l2_subdev *sd,
> > > if (code->index > 0)
> > > return -EINVAL;
> > >
> > > - code->code = MEDIA_BUS_FMT_UYVY8_1X16;
> > > + if (code->pad == OV5645_PAD_IMAGE)
> > > + code->code = OV5645_NATIVE_FORMAT;
> > > + else
> > > + code->code = MEDIA_BUS_FMT_UYVY8_1X16;
> > >
> > > return 0;
> > > }
> > > @@ -835,16 +848,24 @@ static int ov5645_enum_frame_size(struct v4l2_subdev *subdev,
> > > struct v4l2_subdev_state *sd_state,
> > > struct v4l2_subdev_frame_size_enum *fse)
> > > {
> > > - if (fse->code != MEDIA_BUS_FMT_UYVY8_1X16)
> > > - return -EINVAL;
> > > -
> > > - if (fse->index >= ARRAY_SIZE(ov5645_mode_info_data))
> > > - return -EINVAL;
> > > -
> > > - fse->min_width = ov5645_mode_info_data[fse->index].width;
> > > - fse->max_width = ov5645_mode_info_data[fse->index].width;
> > > - fse->min_height = ov5645_mode_info_data[fse->index].height;
> > > - fse->max_height = ov5645_mode_info_data[fse->index].height;
> > > + if (fse->pad == OV5645_PAD_IMAGE) {
> > > + if (fse->code != OV5645_NATIVE_FORMAT || fse->index > 0)
> > > + return -EINVAL;
> > > +
> > > + fse->min_width = OV5645_NATIVE_WIDTH;
> > > + fse->max_width = OV5645_NATIVE_WIDTH;
> > > + fse->min_height = OV5645_NATIVE_HEIGHT;
> > > + fse->max_height = OV5645_NATIVE_HEIGHT;
> > > + } else {
> > > + if (fse->code != MEDIA_BUS_FMT_UYVY8_1X16 ||
> >
> > This will be interesting. With internal pads we will introduce the
> > concept of a "subdev model", which will formally document how the V4L2
> > subdev configuration items (formats, selection rectangles, ...) maps to
> > hardware features. Sakari is working on the definition of a subdev model
> > for raw sensors, that should catter for the needs of raw sensors without
> > a bayer scaler (the vast majority of them). To use internal pads with a
> > non-raw sensor, we'll have to define a model. It may be more
> > challenging/complicated to do so, as the YUV sensor features are less
> > standardized, but it will be an interesting development.
>
> I think I'll make the sub-device model a bitmask, to allow implementing
> more than one at the same time.
>
> I'll try to remember to cc you to the patchset when I'll send it, likely
> next week.
>
Great, I'll withhold sending a v3.
> >
> > > + fse->index >= ARRAY_SIZE(ov5645_mode_info_data))
> > > + return -EINVAL;
> > > +
> > > + fse->min_width = ov5645_mode_info_data[fse->index].width;
> > > + fse->max_width = ov5645_mode_info_data[fse->index].width;
> > > + fse->min_height = ov5645_mode_info_data[fse->index].height;
> > > + fse->max_height = ov5645_mode_info_data[fse->index].height;
> > > + }
> > >
> > > return 0;
> > > }
> > > @@ -855,18 +876,55 @@ static int ov5645_set_format(struct v4l2_subdev *sd,
> > > {
> > > struct ov5645 *ov5645 = to_ov5645(sd);
> > > struct v4l2_mbus_framefmt *__format;
> > > + struct v4l2_rect *compose;
> > > struct v4l2_rect *__crop;
> >
> > While at it, could you rename __crop to crop ?
> >
> > > const struct ov5645_mode_info *new_mode;
> > > int ret;
> > >
> > > - __crop = v4l2_subdev_state_get_crop(sd_state, 0);
> > > + if (format->pad != OV5645_PAD_SOURCE)
> > > + return v4l2_subdev_get_fmt(sd, sd_state, format);
> > > +
> > > new_mode = v4l2_find_nearest_size(ov5645_mode_info_data,
> > > ARRAY_SIZE(ov5645_mode_info_data),
> > > width, height, format->format.width,
> > > format->format.height);
> > > -
> > > - __crop->width = new_mode->width;
> > > - __crop->height = new_mode->height;
> > > + format->format.code = MEDIA_BUS_FMT_UYVY8_1X16;
> > > + format->format.width = new_mode->width;
> > > + format->format.height = new_mode->height;
> > > + format->format.field = V4L2_FIELD_NONE;
> > > + format->format.colorspace = V4L2_COLORSPACE_SRGB;
> > > + format->format.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
> > > + format->format.quantization = V4L2_QUANTIZATION_DEFAULT;
> > > + format->format.xfer_func = V4L2_XFER_FUNC_DEFAULT;
> >
> > Drivers are not supposed to return DEFAULT values, you should pick
> > appropriate values.
> >
> > > +
> > > + __format = v4l2_subdev_state_get_format(sd_state, OV5645_PAD_IMAGE);
> >
> > Maybe __format could also become fmt.
> >
> > > + *__format = format->format;
> > > + __format->code = OV5645_NATIVE_FORMAT;
> > > + __format->width = OV5645_NATIVE_WIDTH;
> > > + __format->height = OV5645_NATIVE_HEIGHT;
> > > +
> > > + __crop = v4l2_subdev_state_get_crop(sd_state, OV5645_PAD_IMAGE);
> > > + __crop->width = format->format.width;
> > > + __crop->height = format->format.height;
> > > +
> > > + /*
> > > + * The compose rectangle models binning, its size is the sensor output
> > > + * size.
> > > + */
> > > + compose = v4l2_subdev_state_get_compose(sd_state, OV5645_PAD_IMAGE);
> > > + compose->left = 0;
> > > + compose->top = 0;
> > > + compose->width = format->format.width;
> > > + compose->height = format->format.height;
> > > +
> > > + __crop = v4l2_subdev_state_get_crop(sd_state, OV5645_PAD_SOURCE);
> > > + __crop->left = 0;
> > > + __crop->top = 0;
> > > + __crop->width = format->format.width;
> > > + __crop->height = format->format.height;
> > > +
> > > + __format = v4l2_subdev_state_get_format(sd_state, OV5645_PAD_SOURCE);
> > > + *__format = format->format;
> > >
> > > if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
> > > ret = __v4l2_ctrl_s_ctrl_int64(ov5645->pixel_clock,
> > > @@ -882,14 +940,6 @@ static int ov5645_set_format(struct v4l2_subdev *sd,
> > > ov5645->current_mode = new_mode;
> > > }
> > >
> > > - __format = v4l2_subdev_state_get_format(sd_state, 0);
> > > - __format->width = __crop->width;
> > > - __format->height = __crop->height;
> > > - __format->code = MEDIA_BUS_FMT_UYVY8_1X16;
> > > - __format->field = V4L2_FIELD_NONE;
> > > - __format->colorspace = V4L2_COLORSPACE_SRGB;
> > > -
> > > - format->format = *__format;
> > >
> > > return 0;
> > > }
> > > @@ -899,7 +949,7 @@ static int ov5645_init_state(struct v4l2_subdev *subdev,
> > > {
> > > struct v4l2_subdev_format fmt = {
> > > .which = V4L2_SUBDEV_FORMAT_TRY,
> > > - .pad = 0,
> > > + .pad = OV5645_PAD_SOURCE,
> > > .format = {
> > > .code = MEDIA_BUS_FMT_UYVY8_1X16,
> > > .width = ov5645_mode_info_data[1].width,
> > > @@ -919,7 +969,7 @@ static int ov5645_get_selection(struct v4l2_subdev *sd,
> > > if (sel->target != V4L2_SEL_TGT_CROP)
> > > return -EINVAL;
> > >
> > > - sel->r = *v4l2_subdev_state_get_crop(sd_state, 0);
> > > + sel->r = *v4l2_subdev_state_get_crop(sd_state, sel->pad);
> >
> > Now there's a compose rectangle, you should support getting it.
> >
> > > return 0;
> > > }
> > >
> > > @@ -1123,11 +1173,12 @@ static int ov5645_probe(struct i2c_client *client)
> > > v4l2_i2c_subdev_init(&ov5645->sd, client, &ov5645_subdev_ops);
> > > ov5645->sd.internal_ops = &ov5645_internal_ops;
> > > ov5645->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
> > > - ov5645->pad.flags = MEDIA_PAD_FL_SOURCE;
> > > + ov5645->pads[OV5645_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
> > > + ov5645->pads[OV5645_PAD_IMAGE].flags = MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_INTERNAL;
> > > ov5645->sd.dev = dev;
> > > ov5645->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> > >
> > > - ret = media_entity_pads_init(&ov5645->sd.entity, 1, &ov5645->pad);
> > > + ret = media_entity_pads_init(&ov5645->sd.entity, ARRAY_SIZE(ov5645->pads), ov5645->pads);
> >
> > Line wrap.
>
> It's good to run:
>
> scripts/checkpatch.pl --strict --max-line-length=80
>
> on the patches.
>
Thanks for the pointer.
Cheers,
Prabhakar
