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path: root/drivers/media/video/omap3isp/isppreview.c
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Diffstat (limited to 'drivers/media/video/omap3isp/isppreview.c')
-rw-r--r--drivers/media/video/omap3isp/isppreview.c419
1 files changed, 269 insertions, 150 deletions
diff --git a/drivers/media/video/omap3isp/isppreview.c b/drivers/media/video/omap3isp/isppreview.c
index aba537af87e4..ccb876fe023f 100644
--- a/drivers/media/video/omap3isp/isppreview.c
+++ b/drivers/media/video/omap3isp/isppreview.c
@@ -76,9 +76,51 @@ static struct omap3isp_prev_csc flr_prev_csc = {
#define DEF_DETECT_CORRECT_VAL 0xe
-#define PREV_MIN_WIDTH 64
-#define PREV_MIN_HEIGHT 8
-#define PREV_MAX_HEIGHT 16384
+/*
+ * Margins and image size limits.
+ *
+ * The preview engine crops several rows and columns internally depending on
+ * which filters are enabled. To avoid format changes when the filters are
+ * enabled or disabled (which would prevent them from being turned on or off
+ * during streaming), the driver assumes all the filters are enabled when
+ * computing sink crop and source format limits.
+ *
+ * If a filter is disabled, additional cropping is automatically added at the
+ * preview engine input by the driver to avoid overflow at line and frame end.
+ * This is completely transparent for applications.
+ *
+ * Median filter 4 pixels
+ * Noise filter,
+ * Faulty pixels correction 4 pixels, 4 lines
+ * CFA filter 4 pixels, 4 lines in Bayer mode
+ * 2 lines in other modes
+ * Color suppression 2 pixels
+ * or luma enhancement
+ * -------------------------------------------------------------
+ * Maximum total 14 pixels, 8 lines
+ *
+ * The color suppression and luma enhancement filters are applied after bayer to
+ * YUV conversion. They thus can crop one pixel on the left and one pixel on the
+ * right side of the image without changing the color pattern. When both those
+ * filters are disabled, the driver must crop the two pixels on the same side of
+ * the image to avoid changing the bayer pattern. The left margin is thus set to
+ * 8 pixels and the right margin to 6 pixels.
+ */
+
+#define PREV_MARGIN_LEFT 8
+#define PREV_MARGIN_RIGHT 6
+#define PREV_MARGIN_TOP 4
+#define PREV_MARGIN_BOTTOM 4
+
+#define PREV_MIN_IN_WIDTH 64
+#define PREV_MIN_IN_HEIGHT 8
+#define PREV_MAX_IN_HEIGHT 16384
+
+#define PREV_MIN_OUT_WIDTH 0
+#define PREV_MIN_OUT_HEIGHT 0
+#define PREV_MAX_OUT_WIDTH 1280
+#define PREV_MAX_OUT_WIDTH_ES2 3300
+#define PREV_MAX_OUT_WIDTH_3630 4096
/*
* Coeficient Tables for the submodules in Preview.
@@ -979,52 +1021,36 @@ static void preview_config_averager(struct isp_prev_device *prev, u8 average)
* enabled when reporting source pad formats to userspace. If this assumption is
* not true, rows and columns must be manually cropped at the preview engine
* input to avoid overflows at the end of lines and frames.
+ *
+ * See the explanation at the PREV_MARGIN_* definitions for more details.
*/
static void preview_config_input_size(struct isp_prev_device *prev)
{
struct isp_device *isp = to_isp_device(prev);
struct prev_params *params = &prev->params;
- struct v4l2_mbus_framefmt *format = &prev->formats[PREV_PAD_SINK];
- unsigned int sph = 0;
- unsigned int eph = format->width - 1;
- unsigned int slv = 0;
- unsigned int elv = format->height - 1;
-
- if (prev->input == PREVIEW_INPUT_CCDC) {
- sph += 2;
- eph -= 2;
+ unsigned int sph = prev->crop.left;
+ unsigned int eph = prev->crop.left + prev->crop.width - 1;
+ unsigned int slv = prev->crop.top;
+ unsigned int elv = prev->crop.top + prev->crop.height - 1;
+
+ if (params->features & PREV_CFA) {
+ sph -= 2;
+ eph += 2;
+ slv -= 2;
+ elv += 2;
}
-
- /*
- * Median filter 4 pixels
- * Noise filter 4 pixels, 4 lines
- * or faulty pixels correction
- * CFA filter 4 pixels, 4 lines in Bayer mode
- * 2 lines in other modes
- * Color suppression 2 pixels
- * or luma enhancement
- * -------------------------------------------------------------
- * Maximum total 14 pixels, 8 lines
- */
-
- if (!(params->features & PREV_CFA)) {
- sph += 2;
- eph -= 2;
- slv += 2;
- elv -= 2;
+ if (params->features & (PREV_DEFECT_COR | PREV_NOISE_FILTER)) {
+ sph -= 2;
+ eph += 2;
+ slv -= 2;
+ elv += 2;
}
- if (!(params->features & (PREV_DEFECT_COR | PREV_NOISE_FILTER))) {
- sph += 2;
- eph -= 2;
- slv += 2;
- elv -= 2;
+ if (params->features & PREV_HORZ_MEDIAN_FILTER) {
+ sph -= 2;
+ eph += 2;
}
- if (!(params->features & PREV_HORZ_MEDIAN_FILTER)) {
- sph += 2;
- eph -= 2;
- }
- if (!(params->features & (PREV_CHROMA_SUPPRESS | PREV_LUMA_ENHANCE)))
- sph += 2;
+ if (params->features & (PREV_CHROMA_SUPPRESS | PREV_LUMA_ENHANCE))
+ sph -= 2;
isp_reg_writel(isp, (sph << ISPPRV_HORZ_INFO_SPH_SHIFT) | eph,
OMAP3_ISP_IOMEM_PREV, ISPPRV_HORZ_INFO);
@@ -1228,7 +1254,6 @@ static void preview_init_params(struct isp_prev_device *prev)
/* Init values */
params->contrast = ISPPRV_CONTRAST_DEF * ISPPRV_CONTRAST_UNITS;
params->brightness = ISPPRV_BRIGHT_DEF * ISPPRV_BRIGHT_UNITS;
- params->average = NO_AVE;
params->cfa.format = OMAP3ISP_CFAFMT_BAYER;
memcpy(params->cfa.table, cfa_coef_table,
sizeof(params->cfa.table));
@@ -1281,14 +1306,14 @@ static unsigned int preview_max_out_width(struct isp_prev_device *prev)
switch (isp->revision) {
case ISP_REVISION_1_0:
- return ISPPRV_MAXOUTPUT_WIDTH;
+ return PREV_MAX_OUT_WIDTH;
case ISP_REVISION_2_0:
default:
- return ISPPRV_MAXOUTPUT_WIDTH_ES2;
+ return PREV_MAX_OUT_WIDTH_ES2;
case ISP_REVISION_15_0:
- return ISPPRV_MAXOUTPUT_WIDTH_3630;
+ return PREV_MAX_OUT_WIDTH_3630;
}
}
@@ -1296,8 +1321,6 @@ static void preview_configure(struct isp_prev_device *prev)
{
struct isp_device *isp = to_isp_device(prev);
struct v4l2_mbus_framefmt *format;
- unsigned int max_out_width;
- unsigned int format_avg;
preview_setup_hw(prev);
@@ -1335,10 +1358,7 @@ static void preview_configure(struct isp_prev_device *prev)
preview_config_outlineoffset(prev,
ALIGN(format->width, 0x10) * 2);
- max_out_width = preview_max_out_width(prev);
-
- format_avg = fls(DIV_ROUND_UP(format->width, max_out_width) - 1);
- preview_config_averager(prev, format_avg);
+ preview_config_averager(prev, 0);
preview_config_ycpos(prev, format->code);
}
@@ -1597,6 +1617,16 @@ __preview_get_format(struct isp_prev_device *prev, struct v4l2_subdev_fh *fh,
return &prev->formats[pad];
}
+static struct v4l2_rect *
+__preview_get_crop(struct isp_prev_device *prev, struct v4l2_subdev_fh *fh,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_crop(fh, PREV_PAD_SINK);
+ else
+ return &prev->crop;
+}
+
/* previewer format descriptions */
static const unsigned int preview_input_fmts[] = {
V4L2_MBUS_FMT_SGRBG10_1X10,
@@ -1611,24 +1641,25 @@ static const unsigned int preview_output_fmts[] = {
};
/*
- * preview_try_format - Handle try format by pad subdev method
- * @prev: ISP preview device
- * @fh : V4L2 subdev file handle
- * @pad: pad num
- * @fmt: pointer to v4l2 format structure
+ * preview_try_format - Validate a format
+ * @prev: ISP preview engine
+ * @fh: V4L2 subdev file handle
+ * @pad: pad number
+ * @fmt: format to be validated
+ * @which: try/active format selector
+ *
+ * Validate and adjust the given format for the given pad based on the preview
+ * engine limits and the format and crop rectangles on other pads.
*/
static void preview_try_format(struct isp_prev_device *prev,
struct v4l2_subdev_fh *fh, unsigned int pad,
struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
- struct v4l2_mbus_framefmt *format;
- unsigned int max_out_width;
enum v4l2_mbus_pixelcode pixelcode;
+ struct v4l2_rect *crop;
unsigned int i;
- max_out_width = preview_max_out_width(prev);
-
switch (pad) {
case PREV_PAD_SINK:
/* When reading data from the CCDC, the input size has already
@@ -1641,10 +1672,11 @@ static void preview_try_format(struct isp_prev_device *prev,
* filter array interpolation.
*/
if (prev->input == PREVIEW_INPUT_MEMORY) {
- fmt->width = clamp_t(u32, fmt->width, PREV_MIN_WIDTH,
- max_out_width * 8);
- fmt->height = clamp_t(u32, fmt->height, PREV_MIN_HEIGHT,
- PREV_MAX_HEIGHT);
+ fmt->width = clamp_t(u32, fmt->width, PREV_MIN_IN_WIDTH,
+ preview_max_out_width(prev));
+ fmt->height = clamp_t(u32, fmt->height,
+ PREV_MIN_IN_HEIGHT,
+ PREV_MAX_IN_HEIGHT);
}
fmt->colorspace = V4L2_COLORSPACE_SRGB;
@@ -1661,15 +1693,8 @@ static void preview_try_format(struct isp_prev_device *prev,
case PREV_PAD_SOURCE:
pixelcode = fmt->code;
- format = __preview_get_format(prev, fh, PREV_PAD_SINK, which);
- memcpy(fmt, format, sizeof(*fmt));
+ *fmt = *__preview_get_format(prev, fh, PREV_PAD_SINK, which);
- /* The preview module output size is configurable through the
- * input interface (horizontal and vertical cropping) and the
- * averager (horizontal scaling by 1/1, 1/2, 1/4 or 1/8). In
- * spite of this, hardcode the output size to the biggest
- * possible value for simplicity reasons.
- */
switch (pixelcode) {
case V4L2_MBUS_FMT_YUYV8_1X16:
case V4L2_MBUS_FMT_UYVY8_1X16:
@@ -1681,31 +1706,14 @@ static void preview_try_format(struct isp_prev_device *prev,
break;
}
- /* The TRM states (12.1.4.7.1.2) that 2 pixels must be cropped
- * from the left and right sides when the input source is the
- * CCDC. This seems not to be needed in practice, investigation
- * is required.
- */
- if (prev->input == PREVIEW_INPUT_CCDC)
- fmt->width -= 4;
-
- /* The preview module can output a maximum of 3312 pixels
- * horizontally due to fixed memory-line sizes. Compute the
- * horizontal averaging factor accordingly. Note that the limit
- * applies to the noise filter and CFA interpolation blocks, so
- * it doesn't take cropping by further blocks into account.
- *
- * ES 1.0 hardware revision is limited to 1280 pixels
- * horizontally.
- */
- fmt->width >>= fls(DIV_ROUND_UP(fmt->width, max_out_width) - 1);
-
- /* Assume that all blocks are enabled and crop pixels and lines
- * accordingly. See preview_config_input_size() for more
- * information.
+ /* The preview module output size is configurable through the
+ * averager (horizontal scaling by 1/1, 1/2, 1/4 or 1/8). This
+ * is not supported yet, hardcode the output size to the crop
+ * rectangle size.
*/
- fmt->width -= 14;
- fmt->height -= 8;
+ crop = __preview_get_crop(prev, fh, which);
+ fmt->width = crop->width;
+ fmt->height = crop->height;
fmt->colorspace = V4L2_COLORSPACE_JPEG;
break;
@@ -1715,6 +1723,49 @@ static void preview_try_format(struct isp_prev_device *prev,
}
/*
+ * preview_try_crop - Validate a crop rectangle
+ * @prev: ISP preview engine
+ * @sink: format on the sink pad
+ * @crop: crop rectangle to be validated
+ *
+ * The preview engine crops lines and columns for its internal operation,
+ * depending on which filters are enabled. Enforce minimum crop margins to
+ * handle that transparently for userspace.
+ *
+ * See the explanation at the PREV_MARGIN_* definitions for more details.
+ */
+static void preview_try_crop(struct isp_prev_device *prev,
+ const struct v4l2_mbus_framefmt *sink,
+ struct v4l2_rect *crop)
+{
+ unsigned int left = PREV_MARGIN_LEFT;
+ unsigned int right = sink->width - PREV_MARGIN_RIGHT;
+ unsigned int top = PREV_MARGIN_TOP;
+ unsigned int bottom = sink->height - PREV_MARGIN_BOTTOM;
+
+ /* When processing data on-the-fly from the CCDC, at least 2 pixels must
+ * be cropped from the left and right sides of the image. As we don't
+ * know which filters will be enabled, increase the left and right
+ * margins by two.
+ */
+ if (prev->input == PREVIEW_INPUT_CCDC) {
+ left += 2;
+ right -= 2;
+ }
+
+ /* Restrict left/top to even values to keep the Bayer pattern. */
+ crop->left &= ~1;
+ crop->top &= ~1;
+
+ crop->left = clamp_t(u32, crop->left, left, right - PREV_MIN_OUT_WIDTH);
+ crop->top = clamp_t(u32, crop->top, top, bottom - PREV_MIN_OUT_HEIGHT);
+ crop->width = clamp_t(u32, crop->width, PREV_MIN_OUT_WIDTH,
+ right - crop->left);
+ crop->height = clamp_t(u32, crop->height, PREV_MIN_OUT_HEIGHT,
+ bottom - crop->top);
+}
+
+/*
* preview_enum_mbus_code - Handle pixel format enumeration
* @sd : pointer to v4l2 subdev structure
* @fh : V4L2 subdev file handle
@@ -1776,6 +1827,60 @@ static int preview_enum_frame_size(struct v4l2_subdev *sd,
}
/*
+ * preview_get_crop - Retrieve the crop rectangle on a pad
+ * @sd: ISP preview V4L2 subdevice
+ * @fh: V4L2 subdev file handle
+ * @crop: crop rectangle
+ *
+ * Return 0 on success or a negative error code otherwise.
+ */
+static int preview_get_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_crop *crop)
+{
+ struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
+
+ /* Cropping is only supported on the sink pad. */
+ if (crop->pad != PREV_PAD_SINK)
+ return -EINVAL;
+
+ crop->rect = *__preview_get_crop(prev, fh, crop->which);
+ return 0;
+}
+
+/*
+ * preview_set_crop - Retrieve the crop rectangle on a pad
+ * @sd: ISP preview V4L2 subdevice
+ * @fh: V4L2 subdev file handle
+ * @crop: crop rectangle
+ *
+ * Return 0 on success or a negative error code otherwise.
+ */
+static int preview_set_crop(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_crop *crop)
+{
+ struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ /* Cropping is only supported on the sink pad. */
+ if (crop->pad != PREV_PAD_SINK)
+ return -EINVAL;
+
+ /* The crop rectangle can't be changed while streaming. */
+ if (prev->state != ISP_PIPELINE_STREAM_STOPPED)
+ return -EBUSY;
+
+ format = __preview_get_format(prev, fh, PREV_PAD_SINK, crop->which);
+ preview_try_crop(prev, format, &crop->rect);
+ *__preview_get_crop(prev, fh, crop->which) = crop->rect;
+
+ /* Update the source format. */
+ format = __preview_get_format(prev, fh, PREV_PAD_SOURCE, crop->which);
+ preview_try_format(prev, fh, PREV_PAD_SOURCE, format, crop->which);
+
+ return 0;
+}
+
+/*
* preview_get_format - Handle get format by pads subdev method
* @sd : pointer to v4l2 subdev structure
* @fh : V4L2 subdev file handle
@@ -1808,6 +1913,7 @@ static int preview_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
{
struct isp_prev_device *prev = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
+ struct v4l2_rect *crop;
format = __preview_get_format(prev, fh, fmt->pad, fmt->which);
if (format == NULL)
@@ -1818,9 +1924,18 @@ static int preview_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
/* Propagate the format from sink to source */
if (fmt->pad == PREV_PAD_SINK) {
+ /* Reset the crop rectangle. */
+ crop = __preview_get_crop(prev, fh, fmt->which);
+ crop->left = 0;
+ crop->top = 0;
+ crop->width = fmt->format.width;
+ crop->height = fmt->format.height;
+
+ preview_try_crop(prev, &fmt->format, crop);
+
+ /* Update the source format. */
format = __preview_get_format(prev, fh, PREV_PAD_SOURCE,
fmt->which);
- *format = fmt->format;
preview_try_format(prev, fh, PREV_PAD_SOURCE, format,
fmt->which);
}
@@ -1869,6 +1984,8 @@ static const struct v4l2_subdev_pad_ops preview_v4l2_pad_ops = {
.enum_frame_size = preview_enum_frame_size,
.get_fmt = preview_get_format,
.set_fmt = preview_set_format,
+ .get_crop = preview_get_crop,
+ .set_crop = preview_set_crop,
};
/* subdev operations */
@@ -1966,8 +2083,44 @@ static const struct media_entity_operations preview_media_ops = {
.link_setup = preview_link_setup,
};
+void omap3isp_preview_unregister_entities(struct isp_prev_device *prev)
+{
+ v4l2_device_unregister_subdev(&prev->subdev);
+ omap3isp_video_unregister(&prev->video_in);
+ omap3isp_video_unregister(&prev->video_out);
+}
+
+int omap3isp_preview_register_entities(struct isp_prev_device *prev,
+ struct v4l2_device *vdev)
+{
+ int ret;
+
+ /* Register the subdev and video nodes. */
+ ret = v4l2_device_register_subdev(vdev, &prev->subdev);
+ if (ret < 0)
+ goto error;
+
+ ret = omap3isp_video_register(&prev->video_in, vdev);
+ if (ret < 0)
+ goto error;
+
+ ret = omap3isp_video_register(&prev->video_out, vdev);
+ if (ret < 0)
+ goto error;
+
+ return 0;
+
+error:
+ omap3isp_preview_unregister_entities(prev);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * ISP previewer initialisation and cleanup
+ */
+
/*
- * review_init_entities - Initialize subdev and media entity.
+ * preview_init_entities - Initialize subdev and media entity.
* @prev : Pointer to preview structure
* return -ENOMEM or zero on success
*/
@@ -2024,69 +2177,34 @@ static int preview_init_entities(struct isp_prev_device *prev)
ret = omap3isp_video_init(&prev->video_in, "preview");
if (ret < 0)
- return ret;
+ goto error_video_in;
ret = omap3isp_video_init(&prev->video_out, "preview");
if (ret < 0)
- return ret;
+ goto error_video_out;
/* Connect the video nodes to the previewer subdev. */
ret = media_entity_create_link(&prev->video_in.video.entity, 0,
&prev->subdev.entity, PREV_PAD_SINK, 0);
if (ret < 0)
- return ret;
+ goto error_link;
ret = media_entity_create_link(&prev->subdev.entity, PREV_PAD_SOURCE,
&prev->video_out.video.entity, 0, 0);
if (ret < 0)
- return ret;
+ goto error_link;
return 0;
-}
-void omap3isp_preview_unregister_entities(struct isp_prev_device *prev)
-{
+error_link:
+ omap3isp_video_cleanup(&prev->video_out);
+error_video_out:
+ omap3isp_video_cleanup(&prev->video_in);
+error_video_in:
media_entity_cleanup(&prev->subdev.entity);
-
- v4l2_device_unregister_subdev(&prev->subdev);
- v4l2_ctrl_handler_free(&prev->ctrls);
- omap3isp_video_unregister(&prev->video_in);
- omap3isp_video_unregister(&prev->video_out);
-}
-
-int omap3isp_preview_register_entities(struct isp_prev_device *prev,
- struct v4l2_device *vdev)
-{
- int ret;
-
- /* Register the subdev and video nodes. */
- ret = v4l2_device_register_subdev(vdev, &prev->subdev);
- if (ret < 0)
- goto error;
-
- ret = omap3isp_video_register(&prev->video_in, vdev);
- if (ret < 0)
- goto error;
-
- ret = omap3isp_video_register(&prev->video_out, vdev);
- if (ret < 0)
- goto error;
-
- return 0;
-
-error:
- omap3isp_preview_unregister_entities(prev);
return ret;
}
-/* -----------------------------------------------------------------------------
- * ISP previewer initialisation and cleanup
- */
-
-void omap3isp_preview_cleanup(struct isp_device *isp)
-{
-}
-
/*
* isp_preview_init - Previewer initialization.
* @dev : Pointer to ISP device
@@ -2095,19 +2213,20 @@ void omap3isp_preview_cleanup(struct isp_device *isp)
int omap3isp_preview_init(struct isp_device *isp)
{
struct isp_prev_device *prev = &isp->isp_prev;
- int ret;
spin_lock_init(&prev->lock);
init_waitqueue_head(&prev->wait);
preview_init_params(prev);
- ret = preview_init_entities(prev);
- if (ret < 0)
- goto out;
+ return preview_init_entities(prev);
+}
-out:
- if (ret)
- omap3isp_preview_cleanup(isp);
+void omap3isp_preview_cleanup(struct isp_device *isp)
+{
+ struct isp_prev_device *prev = &isp->isp_prev;
- return ret;
+ v4l2_ctrl_handler_free(&prev->ctrls);
+ omap3isp_video_cleanup(&prev->video_in);
+ omap3isp_video_cleanup(&prev->video_out);
+ media_entity_cleanup(&prev->subdev.entity);
}