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Date: Fri, 4 Feb 2022 04:54:47 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Jean-Michel Hautbois <jeanmichel.hautbois@...asonboard.com>
Cc: dave.stevenson@...pberrypi.com, devicetree@...r.kernel.org,
kernel-list@...pberrypi.com, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-rpi-kernel@...ts.infradead.org, lukasz@...y.st,
mchehab@...nel.org, naush@...pberrypi.com, robh@...nel.org,
tomi.valkeinen@...asonboard.com, nsaenz@...nel.org,
bcm-kernel-feedback-list@...adcom.com
Subject: Re: [RFC PATCH v4 08/12] media: imx219: Switch from open to init_cfg
Hi Jean-Michel,
Thank you for the patch.
On Thu, Feb 03, 2022 at 06:50:05PM +0100, Jean-Michel Hautbois wrote:
> Use the init_cfg pad level operation instead of the internal subdev
> open operation to set default formats on the pads.
> While at it, make the imx219_pad_ops more easier to read.
>
> Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@...asonboard.com>
> ---
> drivers/media/i2c/imx219.c | 138 +++++++++++++++++++++----------------
> 1 file changed, 80 insertions(+), 58 deletions(-)
>
> diff --git a/drivers/media/i2c/imx219.c b/drivers/media/i2c/imx219.c
> index 74dba5e61201..b68d35046725 100644
> --- a/drivers/media/i2c/imx219.c
> +++ b/drivers/media/i2c/imx219.c
> @@ -118,6 +118,10 @@
> #define IMX219_PIXEL_ARRAY_WIDTH 3280U
> #define IMX219_PIXEL_ARRAY_HEIGHT 2464U
>
> +/* Embedded metadata stream structure */
> +#define IMX219_EMBEDDED_LINE_WIDTH 16384
> +#define IMX219_NUM_EMBEDDED_LINES 1
Align the values like done for the previous macros.
> +
> struct imx219_reg {
> u16 address;
> u8 val;
> @@ -668,51 +672,6 @@ static u32 imx219_get_format_code(struct imx219 *imx219, u32 code)
> return imx219_mbus_formats[i];
> }
>
> -static void imx219_set_default_format(struct imx219 *imx219)
> -{
> - struct v4l2_mbus_framefmt *fmt;
> -
> - fmt = &imx219->fmt;
> - fmt->code = MEDIA_BUS_FMT_SRGGB10_1X10;
> - fmt->colorspace = V4L2_COLORSPACE_SRGB;
> - fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(fmt->colorspace);
> - fmt->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
> - fmt->colorspace,
> - fmt->ycbcr_enc);
> - fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(fmt->colorspace);
> - fmt->width = supported_modes[0].width;
> - fmt->height = supported_modes[0].height;
> - fmt->field = V4L2_FIELD_NONE;
> -}
> -
> -static int imx219_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
> -{
> - struct imx219 *imx219 = to_imx219(sd);
> - struct v4l2_mbus_framefmt *try_fmt =
> - v4l2_subdev_get_try_format(sd, fh->state, 0);
> - struct v4l2_rect *try_crop;
> -
> - mutex_lock(&imx219->mutex);
> -
> - /* Initialize try_fmt */
> - try_fmt->width = supported_modes[0].width;
> - try_fmt->height = supported_modes[0].height;
> - try_fmt->code = imx219_get_format_code(imx219,
> - MEDIA_BUS_FMT_SRGGB10_1X10);
> - try_fmt->field = V4L2_FIELD_NONE;
> -
> - /* Initialize try_crop rectangle. */
> - try_crop = v4l2_subdev_get_try_crop(sd, fh->state, 0);
> - try_crop->top = IMX219_PIXEL_ARRAY_TOP;
> - try_crop->left = IMX219_PIXEL_ARRAY_LEFT;
> - try_crop->width = IMX219_PIXEL_ARRAY_WIDTH;
> - try_crop->height = IMX219_PIXEL_ARRAY_HEIGHT;
> -
> - mutex_unlock(&imx219->mutex);
> -
> - return 0;
> -}
> -
> static int imx219_set_ctrl(struct v4l2_ctrl *ctrl)
> {
> struct imx219 *imx219 =
> @@ -802,6 +761,76 @@ static const struct v4l2_ctrl_ops imx219_ctrl_ops = {
> .s_ctrl = imx219_set_ctrl,
> };
>
> +static void imx219_init_formats(struct v4l2_subdev_state *state)
> +{
> + struct v4l2_mbus_framefmt *format;
> +
> + format = v4l2_state_get_stream_format(state, 0, 0);
> + format->code = imx219_mbus_formats[0];
> + format->width = supported_modes[0].width;
> + format->height = supported_modes[0].height;
> + format->field = V4L2_FIELD_NONE;
> + format->colorspace = V4L2_COLORSPACE_RAW;
> +
> + if (state->routing.routes[1].flags & V4L2_SUBDEV_ROUTE_FL_ACTIVE) {
> + format = v4l2_state_get_stream_format(state, 0, 1);
> + format->code = MEDIA_BUS_FMT_METADATA_8;
> + format->width = IMX219_EMBEDDED_LINE_WIDTH;
> + format->height = 1;
> + format->field = V4L2_FIELD_NONE;
> + format->colorspace = V4L2_COLORSPACE_DEFAULT;
> + }
> +}
> +
> +static int _imx219_set_routing(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state)
> +{
> + struct v4l2_subdev_route routes[] = {
> + {
> + .source_pad = 0,
> + .source_stream = 0,
> + .flags = V4L2_SUBDEV_ROUTE_FL_IMMUTABLE |
> + V4L2_SUBDEV_ROUTE_FL_SOURCE |
> + V4L2_SUBDEV_ROUTE_FL_ACTIVE,
> + },
> + {
> + .source_pad = 0,
> + .source_stream = 1,
> + .flags = V4L2_SUBDEV_ROUTE_FL_SOURCE |
> + V4L2_SUBDEV_ROUTE_FL_ACTIVE,
> + }
> + };
> +
> + struct v4l2_subdev_krouting routing = {
> + .num_routes = ARRAY_SIZE(routes),
> + .routes = routes,
> + };
> +
> + int ret;
> +
> + ret = v4l2_subdev_set_routing(sd, state, &routing);
> + if (ret)
> + return ret;
> +
> + imx219_init_formats(state);
> +
> + return 0;
> +}
> +
> +static int imx219_init_cfg(struct v4l2_subdev *sd,
> + struct v4l2_subdev_state *state)
> +{
> + int ret;
> +
> + v4l2_subdev_lock_state(state);
> +
> + ret = _imx219_set_routing(sd, state);
Adding routing support isn't mentioned in the commit message. Stick to
switching to .init_cfg() in this patch, and add routing support
separately.
> +
> + v4l2_subdev_unlock_state(state);
> +
> + return ret;
> +}
> +
> static int imx219_enum_mbus_code(struct v4l2_subdev *sd,
> struct v4l2_subdev_state *sd_state,
> struct v4l2_subdev_mbus_code_enum *code)
> @@ -1255,11 +1284,12 @@ static const struct v4l2_subdev_video_ops imx219_video_ops = {
> };
>
> static const struct v4l2_subdev_pad_ops imx219_pad_ops = {
> - .enum_mbus_code = imx219_enum_mbus_code,
> - .get_fmt = imx219_get_pad_format,
> - .set_fmt = imx219_set_pad_format,
> - .get_selection = imx219_get_selection,
> - .enum_frame_size = imx219_enum_frame_size,
> + .init_cfg = imx219_init_cfg,
> + .enum_mbus_code = imx219_enum_mbus_code,
> + .get_fmt = imx219_get_pad_format,
> + .set_fmt = imx219_set_pad_format,
> + .get_selection = imx219_get_selection,
> + .enum_frame_size = imx219_enum_frame_size,
> };
>
> static const struct v4l2_subdev_ops imx219_subdev_ops = {
> @@ -1268,10 +1298,6 @@ static const struct v4l2_subdev_ops imx219_subdev_ops = {
> .pad = &imx219_pad_ops,
> };
>
> -static const struct v4l2_subdev_internal_ops imx219_internal_ops = {
> - .open = imx219_open,
> -};
> -
> /* Initialize control handlers */
> static int imx219_init_controls(struct imx219 *imx219)
> {
> @@ -1520,7 +1546,6 @@ static int imx219_probe(struct i2c_client *client)
> goto error_power_off;
>
> /* Initialize subdev */
> - imx219->sd.internal_ops = &imx219_internal_ops;
> imx219->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
> V4L2_SUBDEV_FL_HAS_EVENTS;
> imx219->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR;
> @@ -1528,9 +1553,6 @@ static int imx219_probe(struct i2c_client *client)
> /* Initialize source pad */
> imx219->pad.flags = MEDIA_PAD_FL_SOURCE;
>
> - /* Initialize default format */
> - imx219_set_default_format(imx219);
This isn't right, you're removing initialization of the default
format. Patch 11/12 fixes it, but this one breaks bisection, which isn't
good.
> -
> ret = media_entity_pads_init(&imx219->sd.entity, 1, &imx219->pad);
> if (ret) {
> dev_err(dev, "failed to init entity pads: %d\n", ret);
--
Regards,
Laurent Pinchart
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