/* * TI OMAP4 ISS V4L2 Driver - ISP IPIPE module * * Copyright (C) 2012 Texas Instruments, Inc. * * Author: Sergio Aguirre * * 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 #include #include #include #include #include #include #include "iss.h" #include "iss_regs.h" #include "iss_ipipe.h" static struct v4l2_mbus_framefmt * __ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_pad_config *cfg, unsigned int pad, enum v4l2_subdev_format_whence which); static const unsigned int ipipe_fmts[] = { MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, }; /* * ipipe_print_status - Print current IPIPE Module register values. * @ipipe: Pointer to ISS ISP IPIPE device. * * Also prints other debug information stored in the IPIPE module. */ #define IPIPE_PRINT_REGISTER(iss, name)\ dev_dbg(iss->dev, "###IPIPE " #name "=0x%08x\n", \ iss_reg_read(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_##name)) static void ipipe_print_status(struct iss_ipipe_device *ipipe) { struct iss_device *iss = to_iss_device(ipipe); dev_dbg(iss->dev, "-------------IPIPE Register dump-------------\n"); IPIPE_PRINT_REGISTER(iss, SRC_EN); IPIPE_PRINT_REGISTER(iss, SRC_MODE); IPIPE_PRINT_REGISTER(iss, SRC_FMT); IPIPE_PRINT_REGISTER(iss, SRC_COL); IPIPE_PRINT_REGISTER(iss, SRC_VPS); IPIPE_PRINT_REGISTER(iss, SRC_VSZ); IPIPE_PRINT_REGISTER(iss, SRC_HPS); IPIPE_PRINT_REGISTER(iss, SRC_HSZ); IPIPE_PRINT_REGISTER(iss, GCK_MMR); IPIPE_PRINT_REGISTER(iss, YUV_PHS); dev_dbg(iss->dev, "-----------------------------------------------\n"); } /* * ipipe_enable - Enable/Disable IPIPE. * @enable: enable flag * */ static void ipipe_enable(struct iss_ipipe_device *ipipe, u8 enable) { struct iss_device *iss = to_iss_device(ipipe); iss_reg_update(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_EN, IPIPE_SRC_EN_EN, enable ? IPIPE_SRC_EN_EN : 0); } /* ----------------------------------------------------------------------------- * Format- and pipeline-related configuration helpers */ static void ipipe_configure(struct iss_ipipe_device *ipipe) { struct iss_device *iss = to_iss_device(ipipe); struct v4l2_mbus_framefmt *format; /* IPIPE_PAD_SINK */ format = &ipipe->formats[IPIPE_PAD_SINK]; /* NOTE: Currently just supporting pipeline IN: RGB, OUT: YUV422 */ iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_FMT, IPIPE_SRC_FMT_RAW2YUV); /* Enable YUV444 -> YUV422 conversion */ iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_YUV_PHS, IPIPE_YUV_PHS_LPF); iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VPS, 0); iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HPS, 0); iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_VSZ, (format->height - 2) & IPIPE_SRC_VSZ_MASK); iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_HSZ, (format->width - 1) & IPIPE_SRC_HSZ_MASK); /* Ignore ipipeif_wrt signal, and operate on-the-fly. */ iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_MODE, IPIPE_SRC_MODE_WRT | IPIPE_SRC_MODE_OST); /* HACK: Values tuned for Ducati SW (OV) */ iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_SRC_COL, IPIPE_SRC_COL_EE_B | IPIPE_SRC_COL_EO_GB | IPIPE_SRC_COL_OE_GR | IPIPE_SRC_COL_OO_R); /* IPIPE_PAD_SOURCE_VP */ format = &ipipe->formats[IPIPE_PAD_SOURCE_VP]; /* Do nothing? */ } /* ----------------------------------------------------------------------------- * V4L2 subdev operations */ /* * ipipe_set_stream - Enable/Disable streaming on the IPIPE module * @sd: ISP IPIPE V4L2 subdevice * @enable: Enable/disable stream */ static int ipipe_set_stream(struct v4l2_subdev *sd, int enable) { struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); struct iss_device *iss = to_iss_device(ipipe); int ret = 0; if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) { if (enable == ISS_PIPELINE_STREAM_STOPPED) return 0; omap4iss_isp_subclk_enable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE); /* Enable clk_arm_g0 */ iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_MMR, IPIPE_GCK_MMR_REG); /* Enable clk_pix_g[3:0] */ iss_reg_write(iss, OMAP4_ISS_MEM_ISP_IPIPE, IPIPE_GCK_PIX, IPIPE_GCK_PIX_G3 | IPIPE_GCK_PIX_G2 | IPIPE_GCK_PIX_G1 | IPIPE_GCK_PIX_G0); } switch (enable) { case ISS_PIPELINE_STREAM_CONTINUOUS: ipipe_configure(ipipe); ipipe_print_status(ipipe); atomic_set(&ipipe->stopping, 0); ipipe_enable(ipipe, 1); break; case ISS_PIPELINE_STREAM_STOPPED: if (ipipe->state == ISS_PIPELINE_STREAM_STOPPED) return 0; if (omap4iss_module_sync_idle(&sd->entity, &ipipe->wait, &ipipe->stopping)) ret = -ETIMEDOUT; ipipe_enable(ipipe, 0); omap4iss_isp_subclk_disable(iss, OMAP4_ISS_ISP_SUBCLK_IPIPE); break; } ipipe->state = enable; return ret; } static struct v4l2_mbus_framefmt * __ipipe_get_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_pad_config *cfg, unsigned int pad, enum v4l2_subdev_format_whence which) { if (which == V4L2_SUBDEV_FORMAT_TRY) return v4l2_subdev_get_try_format(&ipipe->subdev, cfg, pad); return &ipipe->formats[pad]; } /* * ipipe_try_format - Try video format on a pad * @ipipe: ISS IPIPE device * @cfg: V4L2 subdev pad config * @pad: Pad number * @fmt: Format */ static void ipipe_try_format(struct iss_ipipe_device *ipipe, struct v4l2_subdev_pad_config *cfg, unsigned int pad, struct v4l2_mbus_framefmt *fmt, enum v4l2_subdev_format_whence which) { struct v4l2_mbus_framefmt *format; unsigned int width = fmt->width; unsigned int height = fmt->height; unsigned int i; switch (pad) { case IPIPE_PAD_SINK: for (i = 0; i < ARRAY_SIZE(ipipe_fmts); i++) { if (fmt->code == ipipe_fmts[i]) break; } /* If not found, use SGRBG10 as default */ if (i >= ARRAY_SIZE(ipipe_fmts)) fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10; /* Clamp the input size. */ fmt->width = clamp_t(u32, width, 1, 8192); fmt->height = clamp_t(u32, height, 1, 8192); fmt->colorspace = V4L2_COLORSPACE_SRGB; break; case IPIPE_PAD_SOURCE_VP: format = __ipipe_get_format(ipipe, cfg, IPIPE_PAD_SINK, which); memcpy(fmt, format, sizeof(*fmt)); fmt->code = MEDIA_BUS_FMT_UYVY8_1X16; fmt->width = clamp_t(u32, width, 32, fmt->width); fmt->height = clamp_t(u32, height, 32, fmt->height); fmt->colorspace = V4L2_COLORSPACE_JPEG; break; } fmt->field = V4L2_FIELD_NONE; } /* * ipipe_enum_mbus_code - Handle pixel format enumeration * @sd : pointer to v4l2 subdev structure * @cfg : V4L2 subdev pad config * @code : pointer to v4l2_subdev_mbus_code_enum structure * return -EINVAL or zero on success */ static int ipipe_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_mbus_code_enum *code) { switch (code->pad) { case IPIPE_PAD_SINK: if (code->index >= ARRAY_SIZE(ipipe_fmts)) return -EINVAL; code->code = ipipe_fmts[code->index]; break; case IPIPE_PAD_SOURCE_VP: /* FIXME: Forced format conversion inside IPIPE ? */ if (code->index != 0) return -EINVAL; code->code = MEDIA_BUS_FMT_UYVY8_1X16; break; default: return -EINVAL; } return 0; } static int ipipe_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_frame_size_enum *fse) { struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt format; if (fse->index != 0) return -EINVAL; format.code = fse->code; format.width = 1; format.height = 1; ipipe_try_format(ipipe, cfg, fse->pad, &format, fse->which); fse->min_width = format.width; fse->min_height = format.height; if (format.code != fse->code) return -EINVAL; format.code = fse->code; format.width = -1; format.height = -1; ipipe_try_format(ipipe, cfg, fse->pad, &format, fse->which); fse->max_width = format.width; fse->max_height = format.height; return 0; } /* * ipipe_get_format - Retrieve the video format on a pad * @sd : ISP IPIPE V4L2 subdevice * @cfg: V4L2 subdev pad config * @fmt: Format * * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond * to the format type. */ static int ipipe_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; format = __ipipe_get_format(ipipe, cfg, fmt->pad, fmt->which); if (format == NULL) return -EINVAL; fmt->format = *format; return 0; } /* * ipipe_set_format - Set the video format on a pad * @sd : ISP IPIPE V4L2 subdevice * @cfg: V4L2 subdev pad config * @fmt: Format * * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond * to the format type. */ static int ipipe_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg, struct v4l2_subdev_format *fmt) { struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); struct v4l2_mbus_framefmt *format; format = __ipipe_get_format(ipipe, cfg, fmt->pad, fmt->which); if (format == NULL) return -EINVAL; ipipe_try_format(ipipe, cfg, fmt->pad, &fmt->format, fmt->which); *format = fmt->format; /* Propagate the format from sink to source */ if (fmt->pad == IPIPE_PAD_SINK) { format = __ipipe_get_format(ipipe, cfg, IPIPE_PAD_SOURCE_VP, fmt->which); *format = fmt->format; ipipe_try_format(ipipe, cfg, IPIPE_PAD_SOURCE_VP, format, fmt->which); } return 0; } static int ipipe_link_validate(struct v4l2_subdev *sd, struct media_link *link, struct v4l2_subdev_format *source_fmt, struct v4l2_subdev_format *sink_fmt) { /* Check if the two ends match */ if (source_fmt->format.width != sink_fmt->format.width || source_fmt->format.height != sink_fmt->format.height) return -EPIPE; if (source_fmt->format.code != sink_fmt->format.code) return -EPIPE; return 0; } /* * ipipe_init_formats - Initialize formats on all pads * @sd: ISP IPIPE V4L2 subdevice * @fh: V4L2 subdev file handle * * Initialize all pad formats with default values. If fh is not NULL, try * formats are initialized on the file handle. Otherwise active formats are * initialized on the device. */ static int ipipe_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) { struct v4l2_subdev_format format; memset(&format, 0, sizeof(format)); format.pad = IPIPE_PAD_SINK; format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10; format.format.width = 4096; format.format.height = 4096; ipipe_set_format(sd, fh ? fh->pad : NULL, &format); return 0; } /* V4L2 subdev video operations */ static const struct v4l2_subdev_video_ops ipipe_v4l2_video_ops = { .s_stream = ipipe_set_stream, }; /* V4L2 subdev pad operations */ static const struct v4l2_subdev_pad_ops ipipe_v4l2_pad_ops = { .enum_mbus_code = ipipe_enum_mbus_code, .enum_frame_size = ipipe_enum_frame_size, .get_fmt = ipipe_get_format, .set_fmt = ipipe_set_format, .link_validate = ipipe_link_validate, }; /* V4L2 subdev operations */ static const struct v4l2_subdev_ops ipipe_v4l2_ops = { .video = &ipipe_v4l2_video_ops, .pad = &ipipe_v4l2_pad_ops, }; /* V4L2 subdev internal operations */ static const struct v4l2_subdev_internal_ops ipipe_v4l2_internal_ops = { .open = ipipe_init_formats, }; /* ----------------------------------------------------------------------------- * Media entity operations */ /* * ipipe_link_setup - Setup IPIPE connections * @entity: IPIPE media entity * @local: Pad at the local end of the link * @remote: Pad at the remote end of the link * @flags: Link flags * * return -EINVAL or zero on success */ static int ipipe_link_setup(struct media_entity *entity, const struct media_pad *local, const struct media_pad *remote, u32 flags) { struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity); struct iss_ipipe_device *ipipe = v4l2_get_subdevdata(sd); struct iss_device *iss = to_iss_device(ipipe); switch (local->index | media_entity_type(remote->entity)) { case IPIPE_PAD_SINK | MEDIA_ENT_T_V4L2_SUBDEV: /* Read from IPIPEIF. */ if (!(flags & MEDIA_LNK_FL_ENABLED)) { ipipe->input = IPIPE_INPUT_NONE; break; } if (ipipe->input != IPIPE_INPUT_NONE) return -EBUSY; if (remote->entity == &iss->ipipeif.subdev.entity) ipipe->input = IPIPE_INPUT_IPIPEIF; break; case IPIPE_PAD_SOURCE_VP | MEDIA_ENT_T_V4L2_SUBDEV: /* Send to RESIZER */ if (flags & MEDIA_LNK_FL_ENABLED) { if (ipipe->output & ~IPIPE_OUTPUT_VP) return -EBUSY; ipipe->output |= IPIPE_OUTPUT_VP; } else { ipipe->output &= ~IPIPE_OUTPUT_VP; } break; default: return -EINVAL; } return 0; } /* media operations */ static const struct media_entity_operations ipipe_media_ops = { .link_setup = ipipe_link_setup, .link_validate = v4l2_subdev_link_validate, }; /* * ipipe_init_entities - Initialize V4L2 subdev and media entity * @ipipe: ISS ISP IPIPE module * * Return 0 on success and a negative error code on failure. */ static int ipipe_init_entities(struct iss_ipipe_device *ipipe) { struct v4l2_subdev *sd = &ipipe->subdev; struct media_pad *pads = ipipe->pads; struct media_entity *me = &sd->entity; int ret; ipipe->input = IPIPE_INPUT_NONE; v4l2_subdev_init(sd, &ipipe_v4l2_ops); sd->internal_ops = &ipipe_v4l2_internal_ops; strlcpy(sd->name, "OMAP4 ISS ISP IPIPE", sizeof(sd->name)); sd->grp_id = 1 << 16; /* group ID for iss subdevs */ v4l2_set_subdevdata(sd, ipipe); sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; pads[IPIPE_PAD_SINK].flags = MEDIA_PAD_FL_SINK; pads[IPIPE_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE; me->ops = &ipipe_media_ops; ret = media_entity_init(me, IPIPE_PADS_NUM, pads, 0); if (ret < 0) return ret; ipipe_init_formats(sd, NULL); return 0; } void omap4iss_ipipe_unregister_entities(struct iss_ipipe_device *ipipe) { v4l2_device_unregister_subdev(&ipipe->subdev); } int omap4iss_ipipe_register_entities(struct iss_ipipe_device *ipipe, struct v4l2_device *vdev) { int ret; /* Register the subdev and video node. */ ret = v4l2_device_register_subdev(vdev, &ipipe->subdev); if (ret < 0) goto error; return 0; error: omap4iss_ipipe_unregister_entities(ipipe); return ret; } /* ----------------------------------------------------------------------------- * ISP IPIPE initialisation and cleanup */ /* * omap4iss_ipipe_init - IPIPE module initialization. * @iss: Device pointer specific to the OMAP4 ISS. * * TODO: Get the initialisation values from platform data. * * Return 0 on success or a negative error code otherwise. */ int omap4iss_ipipe_init(struct iss_device *iss) { struct iss_ipipe_device *ipipe = &iss->ipipe; ipipe->state = ISS_PIPELINE_STREAM_STOPPED; init_waitqueue_head(&ipipe->wait); return ipipe_init_entities(ipipe); } /* * omap4iss_ipipe_cleanup - IPIPE module cleanup. * @iss: Device pointer specific to the OMAP4 ISS. */ void omap4iss_ipipe_cleanup(struct iss_device *iss) { struct iss_ipipe_device *ipipe = &iss->ipipe; media_entity_cleanup(&ipipe->subdev.entity); }