Re: [PATCH v6 08/13] media: atmel: atmel-isc: change format propagation to subdev into only verification
From: Jacopo Mondi
Date: Mon Mar 07 2022 - 06:08:05 EST
Hi Eugen
On Thu, Mar 03, 2022 at 05:36:13PM +0200, Eugen Hristev wrote:
> As a top MC video driver, the atmel-isc should not propagate the format to the
> subdevice.
No need for a line break, or even for a full stop
> It should rather check at start_streaming() time if the subdev is properly
> configured with a compatible format.
> Removed the whole format finding logic, and reworked the format verification
> at start_streaming time, such that the ISC will return an error if the subdevice
> is not properly configured. To achieve this, media_pipeline_start
> is called and a link_validate callback is created to check the formats.
> With this being done, the module parameter 'sensor_preferred' makes no sense
> anymore. The ISC should not decide which format the sensor is using. The
> ISC should only cope with the situation and inform userspace if the streaming
> is possible in the current configuration.
> The redesign of the format propagation has also risen the question of the
> enumfmt callback. If enumfmt is called with an mbus_code, the enumfmt handler
> should only return the formats that are supported for this mbus_code.
> Otherwise, the enumfmt will report all the formats that the ISC could output.
> With this rework, the dynamic list of user formats is removed. It makes no
> more sense to identify at complete time which formats the sensor could emit,
> and add those into a separate dynamic list.
> The ISC will start with a simple preconfigured default format, and at
> link validate time, decide whether it can use the format that is configured
> on the sink or not.
>
> Signed-off-by: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>
> ---
> Changes in v6:
> - reworked a bit enum_fmt as suggested by Jacopo
>
> Changes in v5:
> - removed user_formats dynamic list as it is now pointless
> - greatly simplified the enum_fmt function
> - removed some init code that was useless now
>
> Changes in v4:
> - moved validation code into link_validate and used media_pipeline_start
> - merged this patch with the enum_fmt patch which was previously in v3 of
> the series
>
> Changes in v3:
> - clamp to maximum resolution once the frame size from the subdev is found
>
> drivers/media/platform/atmel/atmel-isc-base.c | 418 ++++++++----------
> .../media/platform/atmel/atmel-isc-scaler.c | 5 +
> drivers/media/platform/atmel/atmel-isc.h | 13 +-
> .../media/platform/atmel/atmel-sama5d2-isc.c | 20 +
> .../media/platform/atmel/atmel-sama7g5-isc.c | 20 +
> 5 files changed, 238 insertions(+), 238 deletions(-)
>
> diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
> index ee1dda6707a0..8682b0591cd0 100644
> --- a/drivers/media/platform/atmel/atmel-isc-base.c
> +++ b/drivers/media/platform/atmel/atmel-isc-base.c
> @@ -36,11 +36,6 @@ static unsigned int debug;
> module_param(debug, int, 0644);
> MODULE_PARM_DESC(debug, "debug level (0-2)");
>
> -static unsigned int sensor_preferred = 1;
> -module_param(sensor_preferred, uint, 0644);
> -MODULE_PARM_DESC(sensor_preferred,
> - "Sensor is preferred to output the specified format (1-on 0-off), default 1");
> -
> #define ISC_IS_FORMAT_RAW(mbus_code) \
> (((mbus_code) & 0xf000) == 0x3000)
>
> @@ -337,6 +332,10 @@ static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
> unsigned long flags;
> int ret;
>
> + ret = media_pipeline_start(&isc->video_dev.entity, &isc->mpipe);
> + if (ret)
> + goto err_pipeline_start;
> +
> /* Enable stream on the sub device */
> ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1);
> if (ret && ret != -ENOIOCTLCMD) {
> @@ -385,6 +384,9 @@ static int isc_start_streaming(struct vb2_queue *vq, unsigned int count)
> v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
>
> err_start_stream:
> + media_pipeline_stop(&isc->video_dev.entity);
> +
> +err_pipeline_start:
> spin_lock_irqsave(&isc->dma_queue_lock, flags);
> list_for_each_entry(buf, &isc->dma_queue, list)
> vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED);
> @@ -423,6 +425,9 @@ static void isc_stop_streaming(struct vb2_queue *vq)
> if (ret && ret != -ENOIOCTLCMD)
> v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n");
>
> + /* Stop media pipeline */
> + media_pipeline_stop(&isc->video_dev.entity);
> +
> /* Release all active buffers */
> spin_lock_irqsave(&isc->dma_queue_lock, flags);
> if (unlikely(isc->cur_frm)) {
> @@ -453,22 +458,6 @@ static void isc_buffer_queue(struct vb2_buffer *vb)
> spin_unlock_irqrestore(&isc->dma_queue_lock, flags);
> }
>
> -static struct isc_format *find_format_by_fourcc(struct isc_device *isc,
> - unsigned int fourcc)
> -{
> - unsigned int num_formats = isc->num_user_formats;
> - struct isc_format *fmt;
> - unsigned int i;
> -
> - for (i = 0; i < num_formats; i++) {
> - fmt = isc->user_formats[i];
> - if (fmt->fourcc == fourcc)
> - return fmt;
> - }
> -
> - return NULL;
> -}
> -
> static const struct vb2_ops isc_vb2_ops = {
> .queue_setup = isc_queue_setup,
> .wait_prepare = vb2_ops_wait_prepare,
> @@ -497,27 +486,59 @@ static int isc_enum_fmt_vid_cap(struct file *file, void *priv,
> {
> struct isc_device *isc = video_drvdata(file);
> u32 index = f->index;
> - u32 i, supported_index;
> + u32 i, supported_index = 0;
> + struct isc_format *fmt;
> +
> + /*
> + * If we are not asked a specific mbus_code, we have to report all
> + * the formats that we can output to.
s/ to\./\./
> + */
> + if (!f->mbus_code) {
> + if (index >= isc->controller_formats_size)
> + return -EINVAL;
>
> - if (index < isc->controller_formats_size) {
> f->pixelformat = isc->controller_formats[index].fourcc;
> +
> return 0;
> }
>
> - index -= isc->controller_formats_size;
> + /*
> + * If a specific mbus_code is requested, check if we support
> + * this mbus_code as input for the ISC.
> + * If it's supported, then we report the corresponding pixelformat
> + * as first possible option for the ISC.
> + * E.g. mbus MEDIA_BUS_FMT_YUYV8_2X8 and report
> + * 'YUYV' (YUYV 4:2:2)
> + */
> + fmt = isc_find_format_by_code(isc, f->mbus_code, &i);
> + if (!fmt)
> + return -EINVAL;
> +
> + if (index == supported_index) {
Does this mean if (index == 0) ?
> + f->pixelformat = fmt->fourcc;
>
> - supported_index = 0;
> + return 0;
> + }
>
> - for (i = 0; i < isc->formats_list_size; i++) {
> - if (!ISC_IS_FORMAT_RAW(isc->formats_list[i].mbus_code) ||
> - !isc->formats_list[i].sd_support)
> - continue;
> - if (supported_index == index) {
> - f->pixelformat = isc->formats_list[i].fourcc;
> - return 0;
> + supported_index++;
> +
> + /* If the index is not raw, we don't have anymore formats to report */
> + if (!ISC_IS_FORMAT_RAW(f->mbus_code))
> + return -EINVAL;
Empty line maybe ?
> + /*
> + * We are asked for a specific mbus code, which is raw.
> + * We have to search through the formats we can convert to.
> + * We have to skip the raw formats, we cannot convert to raw.
> + * E.g. 'AR12' (16-bit ARGB 4-4-4-4), 'AR15' (16-bit ARGB 1-5-5-5), etc.
> + */
> + for (i = 0; i < isc->controller_formats_size; i++)
> + if (!isc->controller_formats[i].raw) {
Maybe if (isc->controller_formats[i].raw)
continue;
To save one indentation level.
> + if (index == supported_index) {
> + f->pixelformat = isc->controller_formats[i].fourcc;
> + return 0;
> + }
> + supported_index++;
> }
> - supported_index++;
> - }
>
> return -EINVAL;
As you've shown the implementation works as desired in a comment on v5
I think this part is now fine.
Reviewed-by: Jacopo Mondi <jacopo@xxxxxxxxxx>
Thank you ;)
> }
> @@ -584,20 +605,30 @@ static int isc_try_validate_formats(struct isc_device *isc)
> break;
> default:
> /* any other different formats are not supported */
> + v4l2_err(&isc->v4l2_dev, "Requested unsupported format.\n");
> ret = -EINVAL;
> }
> v4l2_dbg(1, debug, &isc->v4l2_dev,
> "Format validation, requested rgb=%u, yuv=%u, grey=%u, bayer=%u\n",
> rgb, yuv, grey, bayer);
>
> - /* we cannot output RAW if we do not receive RAW */
> - if ((bayer) && !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code))
> + if (bayer &&
> + !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code)) {
> + v4l2_err(&isc->v4l2_dev, "Cannot output RAW if we do not receive RAW.\n");
> return -EINVAL;
> + }
>
> - /* we cannot output GREY if we do not receive RAW/GREY */
> if (grey && !ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code) &&
> - !ISC_IS_FORMAT_GREY(isc->try_config.sd_format->mbus_code))
> + !ISC_IS_FORMAT_GREY(isc->try_config.sd_format->mbus_code)) {
> + v4l2_err(&isc->v4l2_dev, "Cannot output GREY if we do not receive RAW/GREY.\n");
> + return -EINVAL;
> + }
> +
> + if ((rgb || bayer || yuv) &&
> + ISC_IS_FORMAT_GREY(isc->try_config.sd_format->mbus_code)) {
> + v4l2_err(&isc->v4l2_dev, "Cannot convert GREY to another format.\n");
> return -EINVAL;
> + }
>
> return ret;
> }
> @@ -825,7 +856,7 @@ static void isc_try_fse(struct isc_device *isc,
> * If we do not know yet which format the subdev is using, we cannot
> * do anything.
> */
> - if (!isc->try_config.sd_format)
> + if (!isc->config.sd_format)
> return;
>
> fse.code = isc->try_config.sd_format->mbus_code;
> @@ -846,180 +877,140 @@ static void isc_try_fse(struct isc_device *isc,
> }
> }
>
> -static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
> - u32 *code)
> +static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f)
> {
> - int i;
> - struct isc_format *sd_fmt = NULL, *direct_fmt = NULL;
> struct v4l2_pix_format *pixfmt = &f->fmt.pix;
> - struct v4l2_subdev_pad_config pad_cfg = {};
> - struct v4l2_subdev_state pad_state = {
> - .pads = &pad_cfg
> - };
> - struct v4l2_subdev_format format = {
> - .which = V4L2_SUBDEV_FORMAT_TRY,
> - };
> - u32 mbus_code;
> - int ret;
> - bool rlp_dma_direct_dump = false;
> + unsigned int i;
>
> if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
> return -EINVAL;
>
> - /* Step 1: find a RAW format that is supported */
> - for (i = 0; i < isc->num_user_formats; i++) {
> - if (ISC_IS_FORMAT_RAW(isc->user_formats[i]->mbus_code)) {
> - sd_fmt = isc->user_formats[i];
> + isc->try_config.fourcc = isc->controller_formats[0].fourcc;
> +
> + /* find if the format requested is supported */
> + for (i = 0; i < isc->controller_formats_size; i++)
> + if (isc->controller_formats[i].fourcc == pixfmt->pixelformat) {
> + isc->try_config.fourcc = pixfmt->pixelformat;
> break;
> }
> - }
> - /* Step 2: We can continue with this RAW format, or we can look
> - * for better: maybe sensor supports directly what we need.
> - */
> - direct_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat);
> -
> - /* Step 3: We have both. We decide given the module parameter which
> - * one to use.
> - */
> - if (direct_fmt && sd_fmt && sensor_preferred)
> - sd_fmt = direct_fmt;
> -
> - /* Step 4: we do not have RAW but we have a direct format. Use it. */
> - if (direct_fmt && !sd_fmt)
> - sd_fmt = direct_fmt;
> -
> - /* Step 5: if we are using a direct format, we need to package
> - * everything as 8 bit data and just dump it
> - */
> - if (sd_fmt == direct_fmt)
> - rlp_dma_direct_dump = true;
> -
> - /* Step 6: We have no format. This can happen if the userspace
> - * requests some weird/invalid format.
> - * In this case, default to whatever we have
> - */
> - if (!sd_fmt && !direct_fmt) {
> - sd_fmt = isc->user_formats[isc->num_user_formats - 1];
> - v4l2_dbg(1, debug, &isc->v4l2_dev,
> - "Sensor not supporting %.4s, using %.4s\n",
> - (char *)&pixfmt->pixelformat, (char *)&sd_fmt->fourcc);
> - }
> -
> - if (!sd_fmt) {
> - ret = -EINVAL;
> - goto isc_try_fmt_err;
> - }
> -
> - /* Step 7: Print out what we decided for debugging */
> - v4l2_dbg(1, debug, &isc->v4l2_dev,
> - "Preferring to have sensor using format %.4s\n",
> - (char *)&sd_fmt->fourcc);
>
> - /* Step 8: at this moment we decided which format the subdev will use */
> - isc->try_config.sd_format = sd_fmt;
> + isc_try_configure_rlp_dma(isc, false);
>
> /* Limit to Atmel ISC hardware capabilities */
> - if (pixfmt->width > isc->max_width)
> - pixfmt->width = isc->max_width;
> - if (pixfmt->height > isc->max_height)
> - pixfmt->height = isc->max_height;
> -
> - /*
> - * The mbus format is the one the subdev outputs.
> - * The pixels will be transferred in this format Sensor -> ISC
> - */
> - mbus_code = sd_fmt->mbus_code;
> -
> - /*
> - * Validate formats. If the required format is not OK, default to raw.
> - */
> -
> - isc->try_config.fourcc = pixfmt->pixelformat;
> -
> - if (isc_try_validate_formats(isc)) {
> - pixfmt->pixelformat = isc->try_config.fourcc = sd_fmt->fourcc;
> - /* Re-try to validate the new format */
> - ret = isc_try_validate_formats(isc);
> - if (ret)
> - goto isc_try_fmt_err;
> - }
> -
> - ret = isc_try_configure_rlp_dma(isc, rlp_dma_direct_dump);
> - if (ret)
> - goto isc_try_fmt_err;
> -
> - ret = isc_try_configure_pipeline(isc);
> - if (ret)
> - goto isc_try_fmt_err;
> -
> - /* Obtain frame sizes if possible to have crop requirements ready */
> - isc_try_fse(isc, &pad_state);
> -
> - v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code);
> - ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt,
> - &pad_state, &format);
> - if (ret < 0)
> - goto isc_try_fmt_subdev_err;
> -
> - v4l2_fill_pix_format(pixfmt, &format.format);
> + v4l_bound_align_image(&pixfmt->width, 16, isc->max_width, 0,
> + &pixfmt->height, 16, isc->max_height, 0, 0);
> + /* If we did not find the requested format, we will fallback here */
> + pixfmt->pixelformat = isc->try_config.fourcc;
> + pixfmt->colorspace = V4L2_COLORSPACE_SRGB;
> + pixfmt->field = V4L2_FIELD_NONE;
>
> - /* Limit to Atmel ISC hardware capabilities */
> - if (pixfmt->width > isc->max_width)
> - pixfmt->width = isc->max_width;
> - if (pixfmt->height > isc->max_height)
> - pixfmt->height = isc->max_height;
>
> - pixfmt->field = V4L2_FIELD_NONE;
> pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp_v4l2) >> 3;
> pixfmt->sizeimage = ((pixfmt->width * isc->try_config.bpp) >> 3) *
> pixfmt->height;
>
> - if (code)
> - *code = mbus_code;
> + isc->try_fmt = *f;
>
> return 0;
> +}
>
> -isc_try_fmt_err:
> - v4l2_err(&isc->v4l2_dev, "Could not find any possible format for a working pipeline\n");
> -isc_try_fmt_subdev_err:
> - memset(&isc->try_config, 0, sizeof(isc->try_config));
> +static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
> +{
> + isc_try_fmt(isc, f);
>
> - return ret;
> + /* make the try configuration active */
> + isc->config = isc->try_config;
> + isc->fmt = isc->try_fmt;
> +
> + v4l2_dbg(1, debug, &isc->v4l2_dev, "ISC set_fmt to %.4s @%dx%d\n",
> + (char *)&f->fmt.pix.pixelformat,
> + f->fmt.pix.width, f->fmt.pix.height);
> +
> + return 0;
> }
>
> -static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
> +static int isc_validate(struct isc_device *isc)
> {
> + int ret;
> + int i;
> + struct isc_format *sd_fmt = NULL;
> + struct v4l2_pix_format *pixfmt = &isc->fmt.fmt.pix;
> struct v4l2_subdev_format format = {
> .which = V4L2_SUBDEV_FORMAT_ACTIVE,
> + .pad = isc->remote_pad,
> + };
> + struct v4l2_subdev_pad_config pad_cfg = {};
> + struct v4l2_subdev_state pad_state = {
> + .pads = &pad_cfg,
> };
> - u32 mbus_code = 0;
> - int ret;
>
> - ret = isc_try_fmt(isc, f, &mbus_code);
> + /* Get current format from subdev */
> + ret = v4l2_subdev_call(isc->current_subdev->sd, pad, get_fmt, NULL,
> + &format);
> if (ret)
> return ret;
>
> - v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code);
> - ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
> - set_fmt, NULL, &format);
> - if (ret < 0)
> - return ret;
> + /* Identify the subdev's format configuration */
> + for (i = 0; i < isc->formats_list_size; i++)
> + if (isc->formats_list[i].mbus_code == format.format.code) {
> + sd_fmt = &isc->formats_list[i];
> + break;
> + }
> +
> + /* Check if the format is not supported */
> + if (!sd_fmt) {
> + v4l2_err(&isc->v4l2_dev,
> + "Current subdevice is streaming a media bus code that is not supported 0x%x\n",
> + format.format.code);
> + return -EPIPE;
> + }
> +
> + /* At this moment we know which format the subdev will use */
> + isc->try_config.sd_format = sd_fmt;
> +
> + /* If the sensor is not RAW, we can only do a direct dump */
> + if (!ISC_IS_FORMAT_RAW(isc->try_config.sd_format->mbus_code))
> + isc_try_configure_rlp_dma(isc, true);
>
> /* Limit to Atmel ISC hardware capabilities */
> - if (f->fmt.pix.width > isc->max_width)
> - f->fmt.pix.width = isc->max_width;
> - if (f->fmt.pix.height > isc->max_height)
> - f->fmt.pix.height = isc->max_height;
> + v4l_bound_align_image(&format.format.width, 16, isc->max_width, 0,
> + &format.format.height, 16, isc->max_height, 0, 0);
>
> - isc->fmt = *f;
> + /* Check if the frame size is the same. Otherwise we may overflow */
> + if (pixfmt->height != format.format.height ||
> + pixfmt->width != format.format.width) {
> + v4l2_err(&isc->v4l2_dev,
> + "ISC not configured with the proper frame size: %dx%d\n",
> + format.format.width, format.format.height);
> + return -EPIPE;
> + }
> +
> + v4l2_dbg(1, debug, &isc->v4l2_dev,
> + "Identified subdev using format %.4s with %dx%d %d bpp\n",
> + (char *)&sd_fmt->fourcc, pixfmt->width, pixfmt->height,
> + isc->try_config.bpp);
>
> + /* Reset and restart AWB if the subdevice changed the format */
> if (isc->try_config.sd_format && isc->config.sd_format &&
> isc->try_config.sd_format != isc->config.sd_format) {
> isc->ctrls.hist_stat = HIST_INIT;
> isc_reset_awb_ctrls(isc);
> isc_update_v4l2_ctrls(isc);
> }
> - /* make the try configuration active */
> +
> + /* Validate formats */
> + ret = isc_try_validate_formats(isc);
> + if (ret)
> + return ret;
> +
> + /* Obtain frame sizes if possible to have crop requirements ready */
> + isc_try_fse(isc, &pad_state);
> +
> + /* Configure ISC pipeline for the config */
> + ret = isc_try_configure_pipeline(isc);
> + if (ret)
> + return ret;
> +
> isc->config = isc->try_config;
>
> v4l2_dbg(1, debug, &isc->v4l2_dev, "New ISC configuration in place\n");
> @@ -1043,7 +1034,7 @@ static int isc_try_fmt_vid_cap(struct file *file, void *priv,
> {
> struct isc_device *isc = video_drvdata(file);
>
> - return isc_try_fmt(isc, f, NULL);
> + return isc_try_fmt(isc, f);
> }
>
> static int isc_enum_input(struct file *file, void *priv,
> @@ -1098,10 +1089,6 @@ static int isc_enum_framesizes(struct file *file, void *fh,
> if (fsize->index)
> return -EINVAL;
>
> - for (i = 0; i < isc->num_user_formats; i++)
> - if (isc->user_formats[i]->fourcc == fsize->pixel_format)
> - ret = 0;
> -
> for (i = 0; i < isc->controller_formats_size; i++)
> if (isc->controller_formats[i].fourcc == fsize->pixel_format)
> ret = 0;
> @@ -1782,52 +1769,6 @@ struct isc_format *isc_find_format_by_code(struct isc_device *isc,
> }
> EXPORT_SYMBOL_GPL(isc_find_format_by_code);
>
> -static int isc_formats_init(struct isc_device *isc)
> -{
> - struct isc_format *fmt;
> - struct v4l2_subdev *subdev = isc->current_subdev->sd;
> - unsigned int num_fmts, i, j;
> - u32 list_size = isc->formats_list_size;
> - struct v4l2_subdev_mbus_code_enum mbus_code = {
> - .which = V4L2_SUBDEV_FORMAT_ACTIVE,
> - };
> -
> - num_fmts = 0;
> - while (!v4l2_subdev_call(subdev, pad, enum_mbus_code,
> - NULL, &mbus_code)) {
> - mbus_code.index++;
> -
> - fmt = isc_find_format_by_code(isc, mbus_code.code, &i);
> - if (!fmt) {
> - v4l2_warn(&isc->v4l2_dev, "Mbus code %x not supported\n",
> - mbus_code.code);
> - continue;
> - }
> -
> - fmt->sd_support = true;
> - num_fmts++;
> - }
> -
> - if (!num_fmts)
> - return -ENXIO;
> -
> - isc->num_user_formats = num_fmts;
> - isc->user_formats = devm_kcalloc(isc->dev,
> - num_fmts, sizeof(*isc->user_formats),
> - GFP_KERNEL);
> - if (!isc->user_formats)
> - return -ENOMEM;
> -
> - fmt = &isc->formats_list[0];
> - for (i = 0, j = 0; i < list_size; i++) {
> - if (fmt->sd_support)
> - isc->user_formats[j++] = fmt;
> - fmt++;
> - }
> -
> - return 0;
> -}
> -
> static int isc_set_default_fmt(struct isc_device *isc)
> {
> struct v4l2_format f = {
> @@ -1836,12 +1777,12 @@ static int isc_set_default_fmt(struct isc_device *isc)
> .width = VGA_WIDTH,
> .height = VGA_HEIGHT,
> .field = V4L2_FIELD_NONE,
> - .pixelformat = isc->user_formats[0]->fourcc,
> + .pixelformat = isc->controller_formats[0].fourcc,
> },
> };
> int ret;
>
> - ret = isc_try_fmt(isc, &f, NULL);
> + ret = isc_try_fmt(isc, &f);
> if (ret)
> return ret;
>
> @@ -1896,13 +1837,6 @@ static int isc_async_complete(struct v4l2_async_notifier *notifier)
> spin_lock_init(&isc->dma_queue_lock);
> spin_lock_init(&isc->awb_lock);
>
> - ret = isc_formats_init(isc);
> - if (ret < 0) {
> - v4l2_err(&isc->v4l2_dev,
> - "Init format failed: %d\n", ret);
> - goto isc_async_complete_err;
> - }
> -
> ret = isc_set_default_fmt(isc);
> if (ret) {
> v4l2_err(&isc->v4l2_dev, "Could not set default format\n");
> @@ -2016,6 +1950,24 @@ int isc_pipeline_init(struct isc_device *isc)
> }
> EXPORT_SYMBOL_GPL(isc_pipeline_init);
>
> +int isc_link_validate(struct media_link *link)
> +{
> + struct video_device *vdev =
> + media_entity_to_video_device(link->sink->entity);
> + struct isc_device *isc = video_get_drvdata(vdev);
> + int ret;
> +
> + ret = v4l2_subdev_link_validate(link);
> + if (ret)
> + return ret;
> +
> + return isc_validate(isc);
> +}
> +
> +static const struct media_entity_operations isc_entity_operations = {
> + .link_validate = isc_link_validate,
> +};
> +
> int isc_mc_init(struct isc_device *isc, u32 ver)
> {
> const struct of_device_id *match;
> @@ -2023,6 +1975,8 @@ int isc_mc_init(struct isc_device *isc, u32 ver)
>
> isc->video_dev.entity.function = MEDIA_ENT_F_IO_V4L;
> isc->video_dev.entity.flags = MEDIA_ENT_FL_DEFAULT;
> + isc->video_dev.entity.ops = &isc_entity_operations;
> +
> isc->pads[ISC_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
>
> ret = media_entity_pads_init(&isc->video_dev.entity, ISC_PADS_NUM,
> diff --git a/drivers/media/platform/atmel/atmel-isc-scaler.c b/drivers/media/platform/atmel/atmel-isc-scaler.c
> index 305524c1123e..b8d2696c571c 100644
> --- a/drivers/media/platform/atmel/atmel-isc-scaler.c
> +++ b/drivers/media/platform/atmel/atmel-isc-scaler.c
> @@ -182,6 +182,10 @@ static const struct v4l2_subdev_pad_ops isc_scaler_pad_ops = {
> .init_cfg = isc_scaler_init_cfg,
> };
>
> +static const struct media_entity_operations isc_scaler_entity_ops = {
> + .link_validate = v4l2_subdev_link_validate,
> +};
> +
> static const struct v4l2_subdev_ops xisc_scaler_subdev_ops = {
> .pad = &isc_scaler_pad_ops,
> };
> @@ -199,6 +203,7 @@ int isc_scaler_init(struct isc_device *isc)
>
> isc->scaler_sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
> isc->scaler_sd.entity.function = MEDIA_ENT_F_PROC_VIDEO_SCALER;
> + isc->scaler_sd.entity.ops = &isc_scaler_entity_ops;
> isc->scaler_pads[ISC_SCALER_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
> isc->scaler_pads[ISC_SCALER_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
>
> diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
> index f98f25a55e73..5b0100c8c245 100644
> --- a/drivers/media/platform/atmel/atmel-isc.h
> +++ b/drivers/media/platform/atmel/atmel-isc.h
> @@ -63,15 +63,16 @@ struct isc_subdev_entity {
> * @cfa_baycfg: If this format is RAW BAYER, indicate the type of bayer.
> this is either BGBG, RGRG, etc.
> * @pfe_cfg0_bps: Number of hardware data lines connected to the ISC
> + * @raw: If the format is raw bayer.
> */
>
> struct isc_format {
> u32 fourcc;
> u32 mbus_code;
> u32 cfa_baycfg;
> -
> - bool sd_support;
> u32 pfe_cfg0_bps;
> +
> + bool raw;
> };
>
> /* Pipeline bitmap */
> @@ -216,8 +217,7 @@ enum isc_scaler_pads {
> * @comp: completion reference that signals frame completion
> *
> * @fmt: current v42l format
> - * @user_formats: list of formats that are supported and agreed with sd
> - * @num_user_formats: how many formats are in user_formats
> + * @try_fmt: current v4l2 try format
> *
> * @config: current ISC format configuration
> * @try_config: the current ISC try format , not yet activated
> @@ -272,6 +272,7 @@ enum isc_scaler_pads {
> * @formats_list_size: size of formats_list array
> * @pads: media controller pads for isc video entity
> * @mdev: media device that is registered by the isc
> + * @mpipe: media device pipeline used by the isc
> * @remote_pad: remote pad on the connected subdevice
> * @scaler_sd: subdevice for the scaler that isc registers
> * @scaler_pads: media controller pads for the scaler subdevice
> @@ -298,8 +299,7 @@ struct isc_device {
> struct completion comp;
>
> struct v4l2_format fmt;
> - struct isc_format **user_formats;
> - unsigned int num_user_formats;
> + struct v4l2_format try_fmt;
>
> struct fmt_config config;
> struct fmt_config try_config;
> @@ -369,6 +369,7 @@ struct isc_device {
> struct {
> struct media_pad pads[ISC_PADS_NUM];
> struct media_device mdev;
> + struct media_pipeline mpipe;
>
> u32 remote_pad;
> };
> diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> index d96ee3373889..2a651e237193 100644
> --- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> +++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> @@ -80,20 +80,40 @@ static const struct isc_format sama5d2_controller_formats[] = {
> .fourcc = V4L2_PIX_FMT_Y10,
> }, {
> .fourcc = V4L2_PIX_FMT_SBGGR8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGBRG8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGRBG8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SRGGB8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SBGGR10,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGBRG10,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGRBG10,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SRGGB10,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SBGGR12,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGBRG12,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGRBG12,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SRGGB12,
> + .raw = true,
> },
> };
>
> diff --git a/drivers/media/platform/atmel/atmel-sama7g5-isc.c b/drivers/media/platform/atmel/atmel-sama7g5-isc.c
> index e07ae188c15f..a0d60cfdba7b 100644
> --- a/drivers/media/platform/atmel/atmel-sama7g5-isc.c
> +++ b/drivers/media/platform/atmel/atmel-sama7g5-isc.c
> @@ -89,20 +89,40 @@ static const struct isc_format sama7g5_controller_formats[] = {
> .fourcc = V4L2_PIX_FMT_Y16,
> }, {
> .fourcc = V4L2_PIX_FMT_SBGGR8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGBRG8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGRBG8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SRGGB8,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SBGGR10,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGBRG10,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SGRBG10,
> + .raw = true,
> }, {
> .fourcc = V4L2_PIX_FMT_SRGGB10,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SBGGR12,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGBRG12,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SGRBG12,
> + .raw = true,
> + }, {
> + .fourcc = V4L2_PIX_FMT_SRGGB12,
> + .raw = true,
> },
> };
>
> --
> 2.25.1
>