[media] omap3isp: preview: Add crop support on the sink pad
The crop rectangle takes the preview engine internal cropping requirements into account. The smallest allowable margins are 14 columns and 8 rows when reading from memory, and 18 columns and 8 rows when processing data on the fly from the CCDC. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart
Mauro Carvalho Chehab
Родитель
059dc1d984
Коммит
1f69fd970d
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@ -76,6 +76,42 @@ static struct omap3isp_prev_csc flr_prev_csc = {
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#define DEF_DETECT_CORRECT_VAL 0xe
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/*
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* Margins and image size limits.
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*
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* The preview engine crops several rows and columns internally depending on
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* which filters are enabled. To avoid format changes when the filters are
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* enabled or disabled (which would prevent them from being turned on or off
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* during streaming), the driver assumes all the filters are enabled when
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* computing sink crop and source format limits.
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*
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* If a filter is disabled, additional cropping is automatically added at the
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* preview engine input by the driver to avoid overflow at line and frame end.
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* This is completely transparent for applications.
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*
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* Median filter 4 pixels
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* Noise filter,
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* Faulty pixels correction 4 pixels, 4 lines
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* CFA filter 4 pixels, 4 lines in Bayer mode
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* 2 lines in other modes
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* Color suppression 2 pixels
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* or luma enhancement
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* -------------------------------------------------------------
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* Maximum total 14 pixels, 8 lines
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*
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* The color suppression and luma enhancement filters are applied after bayer to
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* YUV conversion. They thus can crop one pixel on the left and one pixel on the
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* right side of the image without changing the color pattern. When both those
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* filters are disabled, the driver must crop the two pixels on the same side of
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* the image to avoid changing the bayer pattern. The left margin is thus set to
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* 8 pixels and the right margin to 6 pixels.
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*/
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#define PREV_MARGIN_LEFT 8
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#define PREV_MARGIN_RIGHT 6
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#define PREV_MARGIN_TOP 4
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#define PREV_MARGIN_BOTTOM 4
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#define PREV_MIN_IN_WIDTH 64
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#define PREV_MIN_IN_HEIGHT 8
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#define PREV_MAX_IN_HEIGHT 16384
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@ -985,52 +1021,36 @@ static void preview_config_averager(struct isp_prev_device *prev, u8 average)
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* enabled when reporting source pad formats to userspace. If this assumption is
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* not true, rows and columns must be manually cropped at the preview engine
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* input to avoid overflows at the end of lines and frames.
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*
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* See the explanation at the PREV_MARGIN_* definitions for more details.
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*/
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static void preview_config_input_size(struct isp_prev_device *prev)
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{
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struct isp_device *isp = to_isp_device(prev);
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struct prev_params *params = &prev->params;
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struct v4l2_mbus_framefmt *format = &prev->formats[PREV_PAD_SINK];
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unsigned int sph = 0;
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unsigned int eph = format->width - 1;
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unsigned int slv = 0;
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unsigned int elv = format->height - 1;
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unsigned int sph = prev->crop.left;
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unsigned int eph = prev->crop.left + prev->crop.width - 1;
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unsigned int slv = prev->crop.top;
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unsigned int elv = prev->crop.top + prev->crop.height - 1;
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if (prev->input == PREVIEW_INPUT_CCDC) {
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sph += 2;
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eph -= 2;
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if (params->features & PREV_CFA) {
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sph -= 2;
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eph += 2;
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slv -= 2;
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elv += 2;
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}
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/*
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* Median filter 4 pixels
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* Noise filter 4 pixels, 4 lines
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* or faulty pixels correction
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* CFA filter 4 pixels, 4 lines in Bayer mode
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* 2 lines in other modes
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* Color suppression 2 pixels
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* or luma enhancement
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* -------------------------------------------------------------
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* Maximum total 14 pixels, 8 lines
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*/
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if (!(params->features & PREV_CFA)) {
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sph += 2;
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eph -= 2;
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slv += 2;
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elv -= 2;
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if (params->features & (PREV_DEFECT_COR | PREV_NOISE_FILTER)) {
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sph -= 2;
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eph += 2;
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slv -= 2;
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elv += 2;
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}
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if (!(params->features & (PREV_DEFECT_COR | PREV_NOISE_FILTER))) {
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sph += 2;
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eph -= 2;
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slv += 2;
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elv -= 2;
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if (params->features & PREV_HORZ_MEDIAN_FILTER) {
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sph -= 2;
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eph += 2;
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}
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if (!(params->features & PREV_HORZ_MEDIAN_FILTER)) {
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sph += 2;
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eph -= 2;
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}
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if (!(params->features & (PREV_CHROMA_SUPPRESS | PREV_LUMA_ENHANCE)))
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sph += 2;
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if (params->features & (PREV_CHROMA_SUPPRESS | PREV_LUMA_ENHANCE))
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sph -= 2;
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isp_reg_writel(isp, (sph << ISPPRV_HORZ_INFO_SPH_SHIFT) | eph,
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OMAP3_ISP_IOMEM_PREV, ISPPRV_HORZ_INFO);
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@ -1597,6 +1617,16 @@ __preview_get_format(struct isp_prev_device *prev, struct v4l2_subdev_fh *fh,
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return &prev->formats[pad];
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}
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static struct v4l2_rect *
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__preview_get_crop(struct isp_prev_device *prev, struct v4l2_subdev_fh *fh,
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enum v4l2_subdev_format_whence which)
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{
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if (which == V4L2_SUBDEV_FORMAT_TRY)
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return v4l2_subdev_get_try_crop(fh, PREV_PAD_SINK);
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else
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return &prev->crop;
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}
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/* previewer format descriptions */
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static const unsigned int preview_input_fmts[] = {
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V4L2_MBUS_FMT_SGRBG10_1X10,
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@ -1611,19 +1641,23 @@ static const unsigned int preview_output_fmts[] = {
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};
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/*
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* preview_try_format - Handle try format by pad subdev method
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* @prev: ISP preview device
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* @fh : V4L2 subdev file handle
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* @pad: pad num
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* @fmt: pointer to v4l2 format structure
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* preview_try_format - Validate a format
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* @prev: ISP preview engine
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* @fh: V4L2 subdev file handle
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* @pad: pad number
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* @fmt: format to be validated
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* @which: try/active format selector
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*
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* Validate and adjust the given format for the given pad based on the preview
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* engine limits and the format and crop rectangles on other pads.
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*/
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static void preview_try_format(struct isp_prev_device *prev,
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struct v4l2_subdev_fh *fh, unsigned int pad,
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struct v4l2_mbus_framefmt *fmt,
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enum v4l2_subdev_format_whence which)
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{
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struct v4l2_mbus_framefmt *format;
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enum v4l2_mbus_pixelcode pixelcode;
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struct v4l2_rect *crop;
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unsigned int i;
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switch (pad) {
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@ -1659,15 +1693,8 @@ static void preview_try_format(struct isp_prev_device *prev,
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case PREV_PAD_SOURCE:
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pixelcode = fmt->code;
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format = __preview_get_format(prev, fh, PREV_PAD_SINK, which);
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memcpy(fmt, format, sizeof(*fmt));
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*fmt = *__preview_get_format(prev, fh, PREV_PAD_SINK, which);
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/* The preview module output size is configurable through the
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* input interface (horizontal and vertical cropping) and the
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* averager (horizontal scaling by 1/1, 1/2, 1/4 or 1/8). In
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* spite of this, hardcode the output size to the biggest
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* possible value for simplicity reasons.
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*/
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switch (pixelcode) {
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case V4L2_MBUS_FMT_YUYV8_1X16:
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case V4L2_MBUS_FMT_UYVY8_1X16:
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@ -1679,20 +1706,14 @@ static void preview_try_format(struct isp_prev_device *prev,
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break;
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}
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/* The TRM states (12.1.4.7.1.2) that 2 pixels must be cropped
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* from the left and right sides when the input source is the
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* CCDC. This seems not to be needed in practice, investigation
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* is required.
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/* The preview module output size is configurable through the
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* averager (horizontal scaling by 1/1, 1/2, 1/4 or 1/8). This
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* is not supported yet, hardcode the output size to the crop
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* rectangle size.
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*/
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if (prev->input == PREVIEW_INPUT_CCDC)
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fmt->width -= 4;
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/* Assume that all blocks are enabled and crop pixels and lines
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* accordingly. See preview_config_input_size() for more
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* information.
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*/
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fmt->width -= 14;
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fmt->height -= 8;
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crop = __preview_get_crop(prev, fh, which);
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fmt->width = crop->width;
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fmt->height = crop->height;
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fmt->colorspace = V4L2_COLORSPACE_JPEG;
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break;
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@ -1701,6 +1722,49 @@ static void preview_try_format(struct isp_prev_device *prev,
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fmt->field = V4L2_FIELD_NONE;
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}
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/*
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* preview_try_crop - Validate a crop rectangle
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* @prev: ISP preview engine
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* @sink: format on the sink pad
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* @crop: crop rectangle to be validated
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*
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* The preview engine crops lines and columns for its internal operation,
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* depending on which filters are enabled. Enforce minimum crop margins to
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* handle that transparently for userspace.
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*
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* See the explanation at the PREV_MARGIN_* definitions for more details.
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*/
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static void preview_try_crop(struct isp_prev_device *prev,
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const struct v4l2_mbus_framefmt *sink,
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struct v4l2_rect *crop)
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{
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unsigned int left = PREV_MARGIN_LEFT;
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unsigned int right = sink->width - PREV_MARGIN_RIGHT;
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unsigned int top = PREV_MARGIN_TOP;
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unsigned int bottom = sink->height - PREV_MARGIN_BOTTOM;
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/* When processing data on-the-fly from the CCDC, at least 2 pixels must
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* be cropped from the left and right sides of the image. As we don't
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* know which filters will be enabled, increase the left and right
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* margins by two.
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*/
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if (prev->input == PREVIEW_INPUT_CCDC) {
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left += 2;
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right -= 2;
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}
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/* Restrict left/top to even values to keep the Bayer pattern. */
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crop->left &= ~1;
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crop->top &= ~1;
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crop->left = clamp_t(u32, crop->left, left, right - PREV_MIN_OUT_WIDTH);
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crop->top = clamp_t(u32, crop->top, top, bottom - PREV_MIN_OUT_HEIGHT);
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crop->width = clamp_t(u32, crop->width, PREV_MIN_OUT_WIDTH,
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right - crop->left);
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crop->height = clamp_t(u32, crop->height, PREV_MIN_OUT_HEIGHT,
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bottom - crop->top);
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}
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/*
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* preview_enum_mbus_code - Handle pixel format enumeration
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* @sd : pointer to v4l2 subdev structure
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@ -1762,6 +1826,60 @@ static int preview_enum_frame_size(struct v4l2_subdev *sd,
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return 0;
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}
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/*
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* preview_get_crop - Retrieve the crop rectangle on a pad
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* @sd: ISP preview V4L2 subdevice
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* @fh: V4L2 subdev file handle
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* @crop: crop rectangle
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*
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* Return 0 on success or a negative error code otherwise.
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*/
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static int preview_get_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_crop *crop)
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{
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struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
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/* Cropping is only supported on the sink pad. */
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if (crop->pad != PREV_PAD_SINK)
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return -EINVAL;
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crop->rect = *__preview_get_crop(prev, fh, crop->which);
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return 0;
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}
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/*
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* preview_set_crop - Retrieve the crop rectangle on a pad
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* @sd: ISP preview V4L2 subdevice
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* @fh: V4L2 subdev file handle
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* @crop: crop rectangle
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*
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* Return 0 on success or a negative error code otherwise.
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*/
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static int preview_set_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
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struct v4l2_subdev_crop *crop)
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{
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struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
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struct v4l2_mbus_framefmt *format;
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/* Cropping is only supported on the sink pad. */
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if (crop->pad != PREV_PAD_SINK)
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return -EINVAL;
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/* The crop rectangle can't be changed while streaming. */
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if (prev->state != ISP_PIPELINE_STREAM_STOPPED)
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return -EBUSY;
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format = __preview_get_format(prev, fh, PREV_PAD_SINK, crop->which);
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preview_try_crop(prev, format, &crop->rect);
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*__preview_get_crop(prev, fh, crop->which) = crop->rect;
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/* Update the source format. */
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format = __preview_get_format(prev, fh, PREV_PAD_SOURCE, crop->which);
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preview_try_format(prev, fh, PREV_PAD_SOURCE, format, crop->which);
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return 0;
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}
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/*
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* preview_get_format - Handle get format by pads subdev method
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* @sd : pointer to v4l2 subdev structure
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@ -1795,6 +1913,7 @@ static int preview_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
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{
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struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
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struct v4l2_mbus_framefmt *format;
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struct v4l2_rect *crop;
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format = __preview_get_format(prev, fh, fmt->pad, fmt->which);
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if (format == NULL)
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@ -1805,9 +1924,18 @@ static int preview_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
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/* Propagate the format from sink to source */
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if (fmt->pad == PREV_PAD_SINK) {
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/* Reset the crop rectangle. */
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crop = __preview_get_crop(prev, fh, fmt->which);
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crop->left = 0;
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crop->top = 0;
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crop->width = fmt->format.width;
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crop->height = fmt->format.height;
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preview_try_crop(prev, &fmt->format, crop);
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/* Update the source format. */
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format = __preview_get_format(prev, fh, PREV_PAD_SOURCE,
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fmt->which);
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*format = fmt->format;
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preview_try_format(prev, fh, PREV_PAD_SOURCE, format,
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fmt->which);
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}
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@ -1856,6 +1984,8 @@ static const struct v4l2_subdev_pad_ops preview_v4l2_pad_ops = {
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.enum_frame_size = preview_enum_frame_size,
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.get_fmt = preview_get_format,
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.set_fmt = preview_set_format,
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.get_crop = preview_get_crop,
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.set_crop = preview_set_crop,
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};
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/* subdev operations */
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@ -152,6 +152,7 @@ struct isptables_update {
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* @subdev: V4L2 subdevice
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* @pads: Media entity pads
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* @formats: Active formats at the subdev pad
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* @crop: Active crop rectangle
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* @input: Module currently connected to the input pad
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* @output: Bitmask of the active output
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* @video_in: Input video entity
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@ -170,6 +171,7 @@ struct isp_prev_device {
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struct v4l2_subdev subdev;
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struct media_pad pads[PREV_PADS_NUM];
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struct v4l2_mbus_framefmt formats[PREV_PADS_NUM];
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struct v4l2_rect crop;
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struct v4l2_ctrl_handler ctrls;
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