diff options
Diffstat (limited to 'drivers/media/video/omap3isp/isppreview.c')
| -rw-r--r-- | drivers/media/video/omap3isp/isppreview.c | 419 |
1 files changed, 269 insertions, 150 deletions
diff --git a/drivers/media/video/omap3isp/isppreview.c b/drivers/media/video/omap3isp/isppreview.c index aba537a..ccb876f 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); } |