diff options
Diffstat (limited to 'drivers/staging/media/imx/imx-media-utils.c')
| -rw-r--r-- | drivers/staging/media/imx/imx-media-utils.c | 834 |
1 files changed, 834 insertions, 0 deletions
diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c new file mode 100644 index 0000000000000..f7184220d5663 --- /dev/null +++ b/drivers/staging/media/imx/imx-media-utils.c @@ -0,0 +1,834 @@ +/* + * V4L2 Media Controller Driver for Freescale i.MX5/6 SOC + * + * Copyright (c) 2016 Mentor Graphics Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ +#include <linux/module.h> +#include "imx-media.h" + +/* + * List of supported pixel formats for the subdevs. + * + * In all of these tables, the non-mbus formats (with no + * mbus codes) must all fall at the end of the table. + */ + +static const struct imx_media_pixfmt yuv_formats[] = { + { + .fourcc = V4L2_PIX_FMT_UYVY, + .codes = { + MEDIA_BUS_FMT_UYVY8_2X8, + MEDIA_BUS_FMT_UYVY8_1X16 + }, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 16, + }, { + .fourcc = V4L2_PIX_FMT_YUYV, + .codes = { + MEDIA_BUS_FMT_YUYV8_2X8, + MEDIA_BUS_FMT_YUYV8_1X16 + }, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 16, + }, + /*** + * non-mbus YUV formats start here. NOTE! when adding non-mbus + * formats, NUM_NON_MBUS_YUV_FORMATS must be updated below. + ***/ + { + .fourcc = V4L2_PIX_FMT_YUV420, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 12, + .planar = true, + }, { + .fourcc = V4L2_PIX_FMT_YVU420, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 12, + .planar = true, + }, { + .fourcc = V4L2_PIX_FMT_YUV422P, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 16, + .planar = true, + }, { + .fourcc = V4L2_PIX_FMT_NV12, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 12, + .planar = true, + }, { + .fourcc = V4L2_PIX_FMT_NV16, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 16, + .planar = true, + }, +}; + +#define NUM_NON_MBUS_YUV_FORMATS 5 +#define NUM_YUV_FORMATS ARRAY_SIZE(yuv_formats) +#define NUM_MBUS_YUV_FORMATS (NUM_YUV_FORMATS - NUM_NON_MBUS_YUV_FORMATS) + +static const struct imx_media_pixfmt rgb_formats[] = { + { + .fourcc = V4L2_PIX_FMT_RGB565, + .codes = {MEDIA_BUS_FMT_RGB565_2X8_LE}, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 16, + }, { + .fourcc = V4L2_PIX_FMT_RGB24, + .codes = { + MEDIA_BUS_FMT_RGB888_1X24, + MEDIA_BUS_FMT_RGB888_2X12_LE + }, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 24, + }, { + .fourcc = V4L2_PIX_FMT_RGB32, + .codes = {MEDIA_BUS_FMT_ARGB8888_1X32}, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 32, + .ipufmt = true, + }, + /*** raw bayer formats start here ***/ + { + .fourcc = V4L2_PIX_FMT_SBGGR8, + .codes = {MEDIA_BUS_FMT_SBGGR8_1X8}, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 8, + .bayer = true, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG8, + .codes = {MEDIA_BUS_FMT_SGBRG8_1X8}, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 8, + .bayer = true, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG8, + .codes = {MEDIA_BUS_FMT_SGRBG8_1X8}, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 8, + .bayer = true, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB8, + .codes = {MEDIA_BUS_FMT_SRGGB8_1X8}, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 8, + .bayer = true, + }, { + .fourcc = V4L2_PIX_FMT_SBGGR16, + .codes = { + MEDIA_BUS_FMT_SBGGR10_1X10, + MEDIA_BUS_FMT_SBGGR12_1X12, + MEDIA_BUS_FMT_SBGGR14_1X14, + MEDIA_BUS_FMT_SBGGR16_1X16 + }, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 16, + .bayer = true, + }, { + .fourcc = V4L2_PIX_FMT_SGBRG16, + .codes = { + MEDIA_BUS_FMT_SGBRG10_1X10, + MEDIA_BUS_FMT_SGBRG12_1X12, + MEDIA_BUS_FMT_SGBRG14_1X14, + MEDIA_BUS_FMT_SGBRG16_1X16, + }, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 16, + .bayer = true, + }, { + .fourcc = V4L2_PIX_FMT_SGRBG16, + .codes = { + MEDIA_BUS_FMT_SGRBG10_1X10, + MEDIA_BUS_FMT_SGRBG12_1X12, + MEDIA_BUS_FMT_SGRBG14_1X14, + MEDIA_BUS_FMT_SGRBG16_1X16, + }, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 16, + .bayer = true, + }, { + .fourcc = V4L2_PIX_FMT_SRGGB16, + .codes = { + MEDIA_BUS_FMT_SRGGB10_1X10, + MEDIA_BUS_FMT_SRGGB12_1X12, + MEDIA_BUS_FMT_SRGGB14_1X14, + MEDIA_BUS_FMT_SRGGB16_1X16, + }, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 16, + .bayer = true, + }, + /*** + * non-mbus RGB formats start here. NOTE! when adding non-mbus + * formats, NUM_NON_MBUS_RGB_FORMATS must be updated below. + ***/ + { + .fourcc = V4L2_PIX_FMT_BGR24, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 24, + }, { + .fourcc = V4L2_PIX_FMT_BGR32, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 32, + }, +}; + +#define NUM_NON_MBUS_RGB_FORMATS 2 +#define NUM_RGB_FORMATS ARRAY_SIZE(rgb_formats) +#define NUM_MBUS_RGB_FORMATS (NUM_RGB_FORMATS - NUM_NON_MBUS_RGB_FORMATS) + +static const struct imx_media_pixfmt ipu_yuv_formats[] = { + { + .fourcc = V4L2_PIX_FMT_YUV32, + .codes = {MEDIA_BUS_FMT_AYUV8_1X32}, + .cs = IPUV3_COLORSPACE_YUV, + .bpp = 32, + .ipufmt = true, + }, +}; + +#define NUM_IPU_YUV_FORMATS ARRAY_SIZE(ipu_yuv_formats) + +static const struct imx_media_pixfmt ipu_rgb_formats[] = { + { + .fourcc = V4L2_PIX_FMT_RGB32, + .codes = {MEDIA_BUS_FMT_ARGB8888_1X32}, + .cs = IPUV3_COLORSPACE_RGB, + .bpp = 32, + .ipufmt = true, + }, +}; + +#define NUM_IPU_RGB_FORMATS ARRAY_SIZE(ipu_rgb_formats) + +static void init_mbus_colorimetry(struct v4l2_mbus_framefmt *mbus, + const struct imx_media_pixfmt *fmt) +{ + mbus->colorspace = (fmt->cs == IPUV3_COLORSPACE_RGB) ? + V4L2_COLORSPACE_SRGB : V4L2_COLORSPACE_SMPTE170M; + mbus->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(mbus->colorspace); + mbus->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(mbus->colorspace); + mbus->quantization = + V4L2_MAP_QUANTIZATION_DEFAULT(fmt->cs == IPUV3_COLORSPACE_RGB, + mbus->colorspace, + mbus->ycbcr_enc); +} + +static const struct imx_media_pixfmt *find_format(u32 fourcc, + u32 code, + enum codespace_sel cs_sel, + bool allow_non_mbus, + bool allow_bayer) +{ + const struct imx_media_pixfmt *array, *fmt, *ret = NULL; + u32 array_size; + int i, j; + + switch (cs_sel) { + case CS_SEL_YUV: + array_size = NUM_YUV_FORMATS; + array = yuv_formats; + break; + case CS_SEL_RGB: + array_size = NUM_RGB_FORMATS; + array = rgb_formats; + break; + case CS_SEL_ANY: + array_size = NUM_YUV_FORMATS + NUM_RGB_FORMATS; + array = yuv_formats; + break; + default: + return NULL; + } + + for (i = 0; i < array_size; i++) { + if (cs_sel == CS_SEL_ANY && i >= NUM_YUV_FORMATS) + fmt = &rgb_formats[i - NUM_YUV_FORMATS]; + else + fmt = &array[i]; + + if ((!allow_non_mbus && fmt->codes[0] == 0) || + (!allow_bayer && fmt->bayer)) + continue; + + if (fourcc && fmt->fourcc == fourcc) { + ret = fmt; + goto out; + } + + for (j = 0; code && fmt->codes[j]; j++) { + if (code == fmt->codes[j]) { + ret = fmt; + goto out; + } + } + } + +out: + return ret; +} + +static int enum_format(u32 *fourcc, u32 *code, u32 index, + enum codespace_sel cs_sel, + bool allow_non_mbus, + bool allow_bayer) +{ + const struct imx_media_pixfmt *fmt; + u32 mbus_yuv_sz = NUM_MBUS_YUV_FORMATS; + u32 mbus_rgb_sz = NUM_MBUS_RGB_FORMATS; + u32 yuv_sz = NUM_YUV_FORMATS; + u32 rgb_sz = NUM_RGB_FORMATS; + + switch (cs_sel) { + case CS_SEL_YUV: + if (index >= yuv_sz || + (!allow_non_mbus && index >= mbus_yuv_sz)) + return -EINVAL; + fmt = &yuv_formats[index]; + break; + case CS_SEL_RGB: + if (index >= rgb_sz || + (!allow_non_mbus && index >= mbus_rgb_sz)) + return -EINVAL; + fmt = &rgb_formats[index]; + if (!allow_bayer && fmt->bayer) + return -EINVAL; + break; + case CS_SEL_ANY: + if (!allow_non_mbus) { + if (index >= mbus_yuv_sz) { + index -= mbus_yuv_sz; + if (index >= mbus_rgb_sz) + return -EINVAL; + fmt = &rgb_formats[index]; + if (!allow_bayer && fmt->bayer) + return -EINVAL; + } else { + fmt = &yuv_formats[index]; + } + } else { + if (index >= yuv_sz + rgb_sz) + return -EINVAL; + if (index >= yuv_sz) { + fmt = &rgb_formats[index - yuv_sz]; + if (!allow_bayer && fmt->bayer) + return -EINVAL; + } else { + fmt = &yuv_formats[index]; + } + } + break; + default: + return -EINVAL; + } + + if (fourcc) + *fourcc = fmt->fourcc; + if (code) + *code = fmt->codes[0]; + + return 0; +} + +const struct imx_media_pixfmt * +imx_media_find_format(u32 fourcc, enum codespace_sel cs_sel, bool allow_bayer) +{ + return find_format(fourcc, 0, cs_sel, true, allow_bayer); +} +EXPORT_SYMBOL_GPL(imx_media_find_format); + +int imx_media_enum_format(u32 *fourcc, u32 index, enum codespace_sel cs_sel) +{ + return enum_format(fourcc, NULL, index, cs_sel, true, false); +} +EXPORT_SYMBOL_GPL(imx_media_enum_format); + +const struct imx_media_pixfmt * +imx_media_find_mbus_format(u32 code, enum codespace_sel cs_sel, + bool allow_bayer) +{ + return find_format(0, code, cs_sel, false, allow_bayer); +} +EXPORT_SYMBOL_GPL(imx_media_find_mbus_format); + +int imx_media_enum_mbus_format(u32 *code, u32 index, enum codespace_sel cs_sel, + bool allow_bayer) +{ + return enum_format(NULL, code, index, cs_sel, false, allow_bayer); +} +EXPORT_SYMBOL_GPL(imx_media_enum_mbus_format); + +const struct imx_media_pixfmt * +imx_media_find_ipu_format(u32 code, enum codespace_sel cs_sel) +{ + const struct imx_media_pixfmt *array, *fmt, *ret = NULL; + u32 array_size; + int i, j; + + switch (cs_sel) { + case CS_SEL_YUV: + array_size = NUM_IPU_YUV_FORMATS; + array = ipu_yuv_formats; + break; + case CS_SEL_RGB: + array_size = NUM_IPU_RGB_FORMATS; + array = ipu_rgb_formats; + break; + case CS_SEL_ANY: + array_size = NUM_IPU_YUV_FORMATS + NUM_IPU_RGB_FORMATS; + array = ipu_yuv_formats; + break; + default: + return NULL; + } + + for (i = 0; i < array_size; i++) { + if (cs_sel == CS_SEL_ANY && i >= NUM_IPU_YUV_FORMATS) + fmt = &ipu_rgb_formats[i - NUM_IPU_YUV_FORMATS]; + else + fmt = &array[i]; + + for (j = 0; code && fmt->codes[j]; j++) { + if (code == fmt->codes[j]) { + ret = fmt; + goto out; + } + } + } + +out: + return ret; +} +EXPORT_SYMBOL_GPL(imx_media_find_ipu_format); + +int imx_media_enum_ipu_format(u32 *code, u32 index, enum codespace_sel cs_sel) +{ + switch (cs_sel) { + case CS_SEL_YUV: + if (index >= NUM_IPU_YUV_FORMATS) + return -EINVAL; + *code = ipu_yuv_formats[index].codes[0]; + break; + case CS_SEL_RGB: + if (index >= NUM_IPU_RGB_FORMATS) + return -EINVAL; + *code = ipu_rgb_formats[index].codes[0]; + break; + case CS_SEL_ANY: + if (index >= NUM_IPU_YUV_FORMATS + NUM_IPU_RGB_FORMATS) + return -EINVAL; + if (index >= NUM_IPU_YUV_FORMATS) { + index -= NUM_IPU_YUV_FORMATS; + *code = ipu_rgb_formats[index].codes[0]; + } else { + *code = ipu_yuv_formats[index].codes[0]; + } + break; + default: + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(imx_media_enum_ipu_format); + +int imx_media_init_mbus_fmt(struct v4l2_mbus_framefmt *mbus, + u32 width, u32 height, u32 code, u32 field, + const struct imx_media_pixfmt **cc) +{ + const struct imx_media_pixfmt *lcc; + + mbus->width = width; + mbus->height = height; + mbus->field = field; + if (code == 0) + imx_media_enum_mbus_format(&code, 0, CS_SEL_YUV, false); + lcc = imx_media_find_mbus_format(code, CS_SEL_ANY, false); + if (!lcc) { + lcc = imx_media_find_ipu_format(code, CS_SEL_ANY); + if (!lcc) + return -EINVAL; + } + + mbus->code = code; + init_mbus_colorimetry(mbus, lcc); + if (cc) + *cc = lcc; + + return 0; +} +EXPORT_SYMBOL_GPL(imx_media_init_mbus_fmt); + +int imx_media_mbus_fmt_to_pix_fmt(struct v4l2_pix_format *pix, + struct v4l2_mbus_framefmt *mbus, + const struct imx_media_pixfmt *cc) +{ + u32 stride; + + if (!cc) { + cc = imx_media_find_ipu_format(mbus->code, CS_SEL_ANY); + if (!cc) + cc = imx_media_find_mbus_format(mbus->code, CS_SEL_ANY, + true); + if (!cc) + return -EINVAL; + } + + /* + * TODO: the IPU currently does not support the AYUV32 format, + * so until it does convert to a supported YUV format. + */ + if (cc->ipufmt && cc->cs == IPUV3_COLORSPACE_YUV) { + u32 code; + + imx_media_enum_mbus_format(&code, 0, CS_SEL_YUV, false); + cc = imx_media_find_mbus_format(code, CS_SEL_YUV, false); + } + + stride = cc->planar ? mbus->width : (mbus->width * cc->bpp) >> 3; + + pix->width = mbus->width; + pix->height = mbus->height; + pix->pixelformat = cc->fourcc; + pix->colorspace = mbus->colorspace; + pix->xfer_func = mbus->xfer_func; + pix->ycbcr_enc = mbus->ycbcr_enc; + pix->quantization = mbus->quantization; + pix->field = mbus->field; + pix->bytesperline = stride; + pix->sizeimage = (pix->width * pix->height * cc->bpp) >> 3; + + return 0; +} +EXPORT_SYMBOL_GPL(imx_media_mbus_fmt_to_pix_fmt); + +int imx_media_mbus_fmt_to_ipu_image(struct ipu_image *image, + struct v4l2_mbus_framefmt *mbus) +{ + int ret; + + memset(image, 0, sizeof(*image)); + + ret = imx_media_mbus_fmt_to_pix_fmt(&image->pix, mbus, NULL); + if (ret) + return ret; + + image->rect.width = mbus->width; + image->rect.height = mbus->height; + + return 0; +} +EXPORT_SYMBOL_GPL(imx_media_mbus_fmt_to_ipu_image); + +int imx_media_ipu_image_to_mbus_fmt(struct v4l2_mbus_framefmt *mbus, + struct ipu_image *image) +{ + const struct imx_media_pixfmt *fmt; + + fmt = imx_media_find_format(image->pix.pixelformat, CS_SEL_ANY, true); + if (!fmt) + return -EINVAL; + + memset(mbus, 0, sizeof(*mbus)); + mbus->width = image->pix.width; + mbus->height = image->pix.height; + mbus->code = fmt->codes[0]; + mbus->field = image->pix.field; + mbus->colorspace = image->pix.colorspace; + mbus->xfer_func = image->pix.xfer_func; + mbus->ycbcr_enc = image->pix.ycbcr_enc; + mbus->quantization = image->pix.quantization; + + return 0; +} +EXPORT_SYMBOL_GPL(imx_media_ipu_image_to_mbus_fmt); + +void imx_media_free_dma_buf(struct imx_media_dev *imxmd, + struct imx_media_dma_buf *buf) +{ + if (buf->virt) + dma_free_coherent(imxmd->md.dev, buf->len, + buf->virt, buf->phys); + + buf->virt = NULL; + buf->phys = 0; +} +EXPORT_SYMBOL_GPL(imx_media_free_dma_buf); + +int imx_media_alloc_dma_buf(struct imx_media_dev *imxmd, + struct imx_media_dma_buf *buf, + int size) +{ + imx_media_free_dma_buf(imxmd, buf); + + buf->len = PAGE_ALIGN(size); + buf->virt = dma_alloc_coherent(imxmd->md.dev, buf->len, &buf->phys, + GFP_DMA | GFP_KERNEL); + if (!buf->virt) { + dev_err(imxmd->md.dev, "failed to alloc dma buffer\n"); + return -ENOMEM; + } + + return 0; +} +EXPORT_SYMBOL_GPL(imx_media_alloc_dma_buf); + +/* form a subdev name given a group id and ipu id */ +void imx_media_grp_id_to_sd_name(char *sd_name, int sz, u32 grp_id, int ipu_id) +{ + int id; + + switch (grp_id) { + case IMX_MEDIA_GRP_ID_CSI0...IMX_MEDIA_GRP_ID_CSI1: + id = (grp_id >> IMX_MEDIA_GRP_ID_CSI_BIT) - 1; + snprintf(sd_name, sz, "ipu%d_csi%d", ipu_id + 1, id); + break; + case IMX_MEDIA_GRP_ID_VDIC: + snprintf(sd_name, sz, "ipu%d_vdic", ipu_id + 1); + break; + case IMX_MEDIA_GRP_ID_IC_PRP: + snprintf(sd_name, sz, "ipu%d_ic_prp", ipu_id + 1); + break; + case IMX_MEDIA_GRP_ID_IC_PRPENC: + snprintf(sd_name, sz, "ipu%d_ic_prpenc", ipu_id + 1); + break; + case IMX_MEDIA_GRP_ID_IC_PRPVF: + snprintf(sd_name, sz, "ipu%d_ic_prpvf", ipu_id + 1); + break; + default: + break; + } +} +EXPORT_SYMBOL_GPL(imx_media_grp_id_to_sd_name); + +struct imx_media_subdev * +imx_media_find_subdev_by_sd(struct imx_media_dev *imxmd, + struct v4l2_subdev *sd) +{ + struct imx_media_subdev *imxsd; + int i; + + for (i = 0; i < imxmd->num_subdevs; i++) { + imxsd = &imxmd->subdev[i]; + if (sd == imxsd->sd) + return imxsd; + } + + return ERR_PTR(-ENODEV); +} +EXPORT_SYMBOL_GPL(imx_media_find_subdev_by_sd); + +struct imx_media_subdev * +imx_media_find_subdev_by_id(struct imx_media_dev *imxmd, u32 grp_id) +{ + struct imx_media_subdev *imxsd; + int i; + + for (i = 0; i < imxmd->num_subdevs; i++) { + imxsd = &imxmd->subdev[i]; + if (imxsd->sd && imxsd->sd->grp_id == grp_id) + return imxsd; + } + + return ERR_PTR(-ENODEV); +} +EXPORT_SYMBOL_GPL(imx_media_find_subdev_by_id); + +/* + * Adds a video device to the master video device list. This is called by + * an async subdev that owns a video device when it is registered. + */ +int imx_media_add_video_device(struct imx_media_dev *imxmd, + struct imx_media_video_dev *vdev) +{ + int vdev_idx, ret = 0; + + mutex_lock(&imxmd->mutex); + + vdev_idx = imxmd->num_vdevs; + if (vdev_idx >= IMX_MEDIA_MAX_VDEVS) { + dev_err(imxmd->md.dev, + "%s: too many video devices! can't add %s\n", + __func__, vdev->vfd->name); + ret = -ENOSPC; + goto out; + } + + imxmd->vdev[vdev_idx] = vdev; + imxmd->num_vdevs++; +out: + mutex_unlock(&imxmd->mutex); + return ret; +} +EXPORT_SYMBOL_GPL(imx_media_add_video_device); + +/* + * Search upstream or downstream for a subdevice in the current pipeline + * with given grp_id, starting from start_entity. Returns the subdev's + * source/sink pad that it was reached from. Must be called with + * mdev->graph_mutex held. + */ +static struct media_pad * +find_pipeline_pad(struct imx_media_dev *imxmd, + struct media_entity *start_entity, + u32 grp_id, bool upstream) +{ + struct media_entity *me = start_entity; + struct media_pad *pad = NULL; + struct v4l2_subdev *sd; + int i; + + for (i = 0; i < me->num_pads; i++) { + struct media_pad *spad = &me->pads[i]; + + if ((upstream && !(spad->flags & MEDIA_PAD_FL_SINK)) || + (!upstream && !(spad->flags & MEDIA_PAD_FL_SOURCE))) + continue; + + pad = media_entity_remote_pad(spad); + if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) + continue; + + sd = media_entity_to_v4l2_subdev(pad->entity); + if (sd->grp_id & grp_id) + return pad; + + return find_pipeline_pad(imxmd, pad->entity, grp_id, upstream); + } + + return NULL; +} + +/* + * Search upstream for a subdev in the current pipeline with + * given grp_id. Must be called with mdev->graph_mutex held. + */ +static struct v4l2_subdev * +find_upstream_subdev(struct imx_media_dev *imxmd, + struct media_entity *start_entity, + u32 grp_id) +{ + struct v4l2_subdev *sd; + struct media_pad *pad; + + if (is_media_entity_v4l2_subdev(start_entity)) { + sd = media_entity_to_v4l2_subdev(start_entity); + if (sd->grp_id & grp_id) + return sd; + } + + pad = find_pipeline_pad(imxmd, start_entity, grp_id, true); + + return pad ? media_entity_to_v4l2_subdev(pad->entity) : NULL; +} + + +/* + * Find the upstream mipi-csi2 virtual channel reached from the given + * start entity in the current pipeline. + * Must be called with mdev->graph_mutex held. + */ +int imx_media_find_mipi_csi2_channel(struct imx_media_dev *imxmd, + struct media_entity *start_entity) +{ + struct media_pad *pad; + int ret = -EPIPE; + + pad = find_pipeline_pad(imxmd, start_entity, IMX_MEDIA_GRP_ID_CSI2, + true); + if (pad) { + ret = pad->index - 1; + dev_dbg(imxmd->md.dev, "found vc%d from %s\n", + ret, start_entity->name); + } + + return ret; +} +EXPORT_SYMBOL_GPL(imx_media_find_mipi_csi2_channel); + +/* + * Find a subdev reached upstream from the given start entity in + * the current pipeline. + * Must be called with mdev->graph_mutex held. + */ +struct imx_media_subdev * +imx_media_find_upstream_subdev(struct imx_media_dev *imxmd, + struct media_entity *start_entity, + u32 grp_id) +{ + struct v4l2_subdev *sd; + + sd = find_upstream_subdev(imxmd, start_entity, grp_id); + if (!sd) + return ERR_PTR(-ENODEV); + + return imx_media_find_subdev_by_sd(imxmd, sd); +} +EXPORT_SYMBOL_GPL(imx_media_find_upstream_subdev); + +struct imx_media_subdev * +__imx_media_find_sensor(struct imx_media_dev *imxmd, + struct media_entity *start_entity) +{ + return imx_media_find_upstream_subdev(imxmd, start_entity, + IMX_MEDIA_GRP_ID_SENSOR); +} +EXPORT_SYMBOL_GPL(__imx_media_find_sensor); + +struct imx_media_subdev * +imx_media_find_sensor(struct imx_media_dev *imxmd, + struct media_entity *start_entity) +{ + struct imx_media_subdev *sensor; + + mutex_lock(&imxmd->md.graph_mutex); + sensor = __imx_media_find_sensor(imxmd, start_entity); + mutex_unlock(&imxmd->md.graph_mutex); + + return sensor; +} +EXPORT_SYMBOL_GPL(imx_media_find_sensor); + +/* + * Turn current pipeline streaming on/off starting from entity. + */ +int imx_media_pipeline_set_stream(struct imx_media_dev *imxmd, + struct media_entity *entity, + bool on) +{ + struct v4l2_subdev *sd; + int ret = 0; + + if (!is_media_entity_v4l2_subdev(entity)) + return -EINVAL; + sd = media_entity_to_v4l2_subdev(entity); + + mutex_lock(&imxmd->md.graph_mutex); + + if (on) { + ret = __media_pipeline_start(entity, &imxmd->pipe); + if (ret) + goto out; + ret = v4l2_subdev_call(sd, video, s_stream, 1); + if (ret) + __media_pipeline_stop(entity); + } else { + v4l2_subdev_call(sd, video, s_stream, 0); + if (entity->pipe) + __media_pipeline_stop(entity); + } + +out: + mutex_unlock(&imxmd->md.graph_mutex); + return ret; +} +EXPORT_SYMBOL_GPL(imx_media_pipeline_set_stream); + +MODULE_DESCRIPTION("i.MX5/6 v4l2 media controller driver"); +MODULE_AUTHOR("Steve Longerbeam <steve_longerbeam@mentor.com>"); +MODULE_LICENSE("GPL"); |