/* * S5P/EXYNOS4 SoC series camera host interface media device driver * * Copyright (C) 2011 - 2012 Samsung Electronics Co., Ltd. * Sylwester Nawrocki * * 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 #include #include #include #include #include #include #include #include #include #include #include #include "media-dev.h" #include "fimc-core.h" #include "fimc-is.h" #include "fimc-lite.h" #include "mipi-csis.h" static int __fimc_md_set_camclk(struct fimc_md *fmd, struct fimc_source_info *si, bool on); /** * fimc_pipeline_prepare - update pipeline information with subdevice pointers * @me: media entity terminating the pipeline * * Caller holds the graph mutex. */ static void fimc_pipeline_prepare(struct fimc_pipeline *p, struct media_entity *me) { struct v4l2_subdev *sd; int i; for (i = 0; i < IDX_MAX; i++) p->subdevs[i] = NULL; while (1) { struct media_pad *pad = NULL; /* Find remote source pad */ for (i = 0; i < me->num_pads; i++) { struct media_pad *spad = &me->pads[i]; if (!(spad->flags & MEDIA_PAD_FL_SINK)) continue; pad = media_entity_remote_source(spad); if (pad) break; } if (pad == NULL || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV) break; sd = media_entity_to_v4l2_subdev(pad->entity); switch (sd->grp_id) { case GRP_ID_FIMC_IS_SENSOR: case GRP_ID_SENSOR: p->subdevs[IDX_SENSOR] = sd; break; case GRP_ID_CSIS: p->subdevs[IDX_CSIS] = sd; break; case GRP_ID_FLITE: p->subdevs[IDX_FLITE] = sd; break; case GRP_ID_FIMC: /* No need to control FIMC subdev through subdev ops */ break; case GRP_ID_FIMC_IS: p->subdevs[IDX_IS_ISP] = sd; break; default: break; } me = &sd->entity; if (me->num_pads == 1) break; } } /** * __subdev_set_power - change power state of a single subdev * @sd: subdevice to change power state for * @on: 1 to enable power or 0 to disable * * Return result of s_power subdev operation or -ENXIO if sd argument * is NULL. Return 0 if the subdevice does not implement s_power. */ static int __subdev_set_power(struct v4l2_subdev *sd, int on) { int *use_count; int ret; if (sd == NULL) return -ENXIO; use_count = &sd->entity.use_count; if (on && (*use_count)++ > 0) return 0; else if (!on && (*use_count == 0 || --(*use_count) > 0)) return 0; ret = v4l2_subdev_call(sd, core, s_power, on); return ret != -ENOIOCTLCMD ? ret : 0; } /** * fimc_pipeline_s_power - change power state of all pipeline subdevs * @fimc: fimc device terminating the pipeline * @state: true to power on, false to power off * * Needs to be called with the graph mutex held. */ static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on) { static const u8 seq[2][IDX_MAX - 1] = { { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE }, { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP }, }; int i, ret = 0; if (p->subdevs[IDX_SENSOR] == NULL) return -ENXIO; for (i = 0; i < IDX_MAX - 1; i++) { unsigned int idx = seq[on][i]; ret = __subdev_set_power(p->subdevs[idx], on); if (ret < 0 && ret != -ENXIO) goto error; } return 0; error: for (; i >= 0; i--) { unsigned int idx = seq[on][i]; __subdev_set_power(p->subdevs[idx], !on); } return ret; } /** * __fimc_pipeline_open - update the pipeline information, enable power * of all pipeline subdevs and the sensor clock * @me: media entity to start graph walk with * @prepare: true to walk the current pipeline and acquire all subdevs * * Called with the graph mutex held. */ static int __fimc_pipeline_open(struct fimc_pipeline *p, struct media_entity *me, bool prepare) { struct fimc_md *fmd = entity_to_fimc_mdev(me); struct v4l2_subdev *sd; int ret; if (WARN_ON(p == NULL || me == NULL)) return -EINVAL; if (prepare) fimc_pipeline_prepare(p, me); sd = p->subdevs[IDX_SENSOR]; if (sd == NULL) return -EINVAL; /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */ if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) { ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]); if (ret < 0) return ret; } ret = fimc_md_set_camclk(sd, true); if (ret < 0) goto err_wbclk; ret = fimc_pipeline_s_power(p, 1); if (!ret) return 0; fimc_md_set_camclk(sd, false); err_wbclk: if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]); return ret; } /** * __fimc_pipeline_close - disable the sensor clock and pipeline power * @fimc: fimc device terminating the pipeline * * Disable power of all subdevs and turn the external sensor clock off. */ static int __fimc_pipeline_close(struct fimc_pipeline *p) { struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL; struct fimc_md *fmd; int ret = 0; if (WARN_ON(sd == NULL)) return -EINVAL; if (p->subdevs[IDX_SENSOR]) { ret = fimc_pipeline_s_power(p, 0); fimc_md_set_camclk(sd, false); } fmd = entity_to_fimc_mdev(&sd->entity); /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */ if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]); return ret == -ENXIO ? 0 : ret; } /** * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs * @pipeline: video pipeline structure * @on: passed as the s_stream() callback argument */ static int __fimc_pipeline_s_stream(struct fimc_pipeline *p, bool on) { static const u8 seq[2][IDX_MAX] = { { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE }, { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP }, }; int i, ret = 0; if (p->subdevs[IDX_SENSOR] == NULL) return -ENODEV; for (i = 0; i < IDX_MAX; i++) { unsigned int idx = seq[on][i]; ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) goto error; } return 0; error: for (; i >= 0; i--) { unsigned int idx = seq[on][i]; v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on); } return ret; } /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */ static const struct fimc_pipeline_ops fimc_pipeline_ops = { .open = __fimc_pipeline_open, .close = __fimc_pipeline_close, .set_stream = __fimc_pipeline_s_stream, }; /* * Sensor subdevice helper functions */ static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd, struct fimc_source_info *si) { struct i2c_adapter *adapter; struct v4l2_subdev *sd = NULL; if (!si || !fmd) return NULL; /* * If FIMC bus type is not Writeback FIFO assume it is same * as sensor_bus_type. */ si->fimc_bus_type = si->sensor_bus_type; adapter = i2c_get_adapter(si->i2c_bus_num); if (!adapter) { v4l2_warn(&fmd->v4l2_dev, "Failed to get I2C adapter %d, deferring probe\n", si->i2c_bus_num); return ERR_PTR(-EPROBE_DEFER); } sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter, si->board_info, NULL); if (IS_ERR_OR_NULL(sd)) { i2c_put_adapter(adapter); v4l2_warn(&fmd->v4l2_dev, "Failed to acquire subdev %s, deferring probe\n", si->board_info->type); return ERR_PTR(-EPROBE_DEFER); } v4l2_set_subdev_hostdata(sd, si); sd->grp_id = GRP_ID_SENSOR; v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n", sd->name); return sd; } static void fimc_md_unregister_sensor(struct v4l2_subdev *sd) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct i2c_adapter *adapter; if (!client) return; v4l2_device_unregister_subdev(sd); if (!client->dev.of_node) { adapter = client->adapter; i2c_unregister_device(client); if (adapter) i2c_put_adapter(adapter); } } #ifdef CONFIG_OF /* Register I2C client subdev associated with @node. */ static int fimc_md_of_add_sensor(struct fimc_md *fmd, struct device_node *node, int index) { struct fimc_sensor_info *si; struct i2c_client *client; struct v4l2_subdev *sd; int ret; if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor))) return -EINVAL; si = &fmd->sensor[index]; client = of_find_i2c_device_by_node(node); if (!client) return -EPROBE_DEFER; device_lock(&client->dev); if (!client->driver || !try_module_get(client->driver->driver.owner)) { ret = -EPROBE_DEFER; v4l2_info(&fmd->v4l2_dev, "No driver found for %s\n", node->full_name); goto dev_put; } /* Enable sensor's master clock */ ret = __fimc_md_set_camclk(fmd, &si->pdata, true); if (ret < 0) goto mod_put; sd = i2c_get_clientdata(client); ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); __fimc_md_set_camclk(fmd, &si->pdata, false); if (ret < 0) goto mod_put; v4l2_set_subdev_hostdata(sd, &si->pdata); if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) sd->grp_id = GRP_ID_FIMC_IS_SENSOR; else sd->grp_id = GRP_ID_SENSOR; si->subdev = sd; v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n", sd->name, fmd->num_sensors); fmd->num_sensors++; mod_put: module_put(client->driver->driver.owner); dev_put: device_unlock(&client->dev); put_device(&client->dev); return ret; } /* Parse port node and register as a sub-device any sensor specified there. */ static int fimc_md_parse_port_node(struct fimc_md *fmd, struct device_node *port, unsigned int index) { struct device_node *rem, *ep, *np; struct fimc_source_info *pd; struct v4l2_of_endpoint endpoint; int ret; u32 val; pd = &fmd->sensor[index].pdata; /* Assume here a port node can have only one endpoint node. */ ep = of_get_next_child(port, NULL); if (!ep) return 0; v4l2_of_parse_endpoint(ep, &endpoint); if (WARN_ON(endpoint.port == 0) || index >= FIMC_MAX_SENSORS) return -EINVAL; pd->mux_id = (endpoint.port - 1) & 0x1; rem = v4l2_of_get_remote_port_parent(ep); of_node_put(ep); if (rem == NULL) { v4l2_info(&fmd->v4l2_dev, "Remote device at %s not found\n", ep->full_name); return 0; } if (!of_property_read_u32(rem, "samsung,camclk-out", &val)) pd->clk_id = val; if (!of_property_read_u32(rem, "clock-frequency", &val)) pd->clk_frequency = val; if (pd->clk_frequency == 0) { v4l2_err(&fmd->v4l2_dev, "Wrong clock frequency at node %s\n", rem->full_name); of_node_put(rem); return -EINVAL; } if (fimc_input_is_parallel(endpoint.port)) { if (endpoint.bus_type == V4L2_MBUS_PARALLEL) pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601; else pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656; pd->flags = endpoint.bus.parallel.flags; } else if (fimc_input_is_mipi_csi(endpoint.port)) { /* * MIPI CSI-2: only input mux selection and * the sensor's clock frequency is needed. */ pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2; } else { v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %s\n", endpoint.port, rem->full_name); } /* * For FIMC-IS handled sensors, that are placed under i2c-isp device * node, FIMC is connected to the FIMC-IS through its ISP Writeback * input. Sensors are attached to the FIMC-LITE hostdata interface * directly or through MIPI-CSIS, depending on the external media bus * used. This needs to be handled in a more reliable way, not by just * checking parent's node name. */ np = of_get_parent(rem); if (np && !of_node_cmp(np->name, "i2c-isp")) pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK; else pd->fimc_bus_type = pd->sensor_bus_type; ret = fimc_md_of_add_sensor(fmd, rem, index); of_node_put(rem); return ret; } /* Register all SoC external sub-devices */ static int fimc_md_of_sensors_register(struct fimc_md *fmd, struct device_node *np) { struct device_node *parent = fmd->pdev->dev.of_node; struct device_node *node, *ports; int index = 0; int ret; /* Attach sensors linked to MIPI CSI-2 receivers */ for_each_available_child_of_node(parent, node) { struct device_node *port; if (of_node_cmp(node->name, "csis")) continue; /* The csis node can have only port subnode. */ port = of_get_next_child(node, NULL); if (!port) continue; ret = fimc_md_parse_port_node(fmd, port, index); if (ret < 0) return ret; index++; } /* Attach sensors listed in the parallel-ports node */ ports = of_get_child_by_name(parent, "parallel-ports"); if (!ports) return 0; for_each_child_of_node(ports, node) { ret = fimc_md_parse_port_node(fmd, node, index); if (ret < 0) break; index++; } return 0; } static int __of_get_csis_id(struct device_node *np) { u32 reg = 0; np = of_get_child_by_name(np, "port"); if (!np) return -EINVAL; of_property_read_u32(np, "reg", ®); return reg - FIMC_INPUT_MIPI_CSI2_0; } #else #define fimc_md_of_sensors_register(fmd, np) (-ENOSYS) #define __of_get_csis_id(np) (-ENOSYS) #endif static int fimc_md_register_sensor_entities(struct fimc_md *fmd) { struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data; struct device_node *of_node = fmd->pdev->dev.of_node; int num_clients = 0; int ret, i; /* * Runtime resume one of the FIMC entities to make sure * the sclk_cam clocks are not globally disabled. */ if (!fmd->pmf) return -ENXIO; ret = pm_runtime_get_sync(fmd->pmf); if (ret < 0) return ret; if (of_node) { fmd->num_sensors = 0; ret = fimc_md_of_sensors_register(fmd, of_node); } else if (pdata) { WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor)); num_clients = min_t(u32, pdata->num_clients, ARRAY_SIZE(fmd->sensor)); fmd->num_sensors = num_clients; for (i = 0; i < num_clients; i++) { struct fimc_sensor_info *si = &fmd->sensor[i]; struct v4l2_subdev *sd; si->pdata = pdata->source_info[i]; ret = __fimc_md_set_camclk(fmd, &si->pdata, true); if (ret) break; sd = fimc_md_register_sensor(fmd, &si->pdata); ret = __fimc_md_set_camclk(fmd, &si->pdata, false); if (IS_ERR(sd)) { si->subdev = NULL; ret = PTR_ERR(sd); break; } si->subdev = sd; if (ret) break; } } pm_runtime_put(fmd->pmf); return ret; } /* * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration. */ static int register_fimc_lite_entity(struct fimc_md *fmd, struct fimc_lite *fimc_lite) { struct v4l2_subdev *sd; int ret; if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS || fmd->fimc_lite[fimc_lite->index])) return -EBUSY; sd = &fimc_lite->subdev; sd->grp_id = GRP_ID_FLITE; v4l2_set_subdev_hostdata(sd, (void *)&fimc_pipeline_ops); ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); if (!ret) fmd->fimc_lite[fimc_lite->index] = fimc_lite; else v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n", fimc_lite->index); return ret; } static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc) { struct v4l2_subdev *sd; int ret; if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id])) return -EBUSY; sd = &fimc->vid_cap.subdev; sd->grp_id = GRP_ID_FIMC; v4l2_set_subdev_hostdata(sd, (void *)&fimc_pipeline_ops); ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); if (!ret) { if (!fmd->pmf && fimc->pdev) fmd->pmf = &fimc->pdev->dev; fmd->fimc[fimc->id] = fimc; fimc->vid_cap.user_subdev_api = fmd->user_subdev_api; } else { v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n", fimc->id, ret); } return ret; } static int register_csis_entity(struct fimc_md *fmd, struct platform_device *pdev, struct v4l2_subdev *sd) { struct device_node *node = pdev->dev.of_node; int id, ret; id = node ? __of_get_csis_id(node) : max(0, pdev->id); if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES)) return -ENOENT; if (WARN_ON(fmd->csis[id].sd)) return -EBUSY; sd->grp_id = GRP_ID_CSIS; ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); if (!ret) fmd->csis[id].sd = sd; else v4l2_err(&fmd->v4l2_dev, "Failed to register MIPI-CSIS.%d (%d)\n", id, ret); return ret; } static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is) { struct v4l2_subdev *sd = &is->isp.subdev; int ret; ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd); if (ret) { v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC-ISP (%d)\n", ret); return ret; } fmd->fimc_is = is; return 0; } static int fimc_md_register_platform_entity(struct fimc_md *fmd, struct platform_device *pdev, int plat_entity) { struct device *dev = &pdev->dev; int ret = -EPROBE_DEFER; void *drvdata; /* Lock to ensure dev->driver won't change. */ device_lock(dev); if (!dev->driver || !try_module_get(dev->driver->owner)) goto dev_unlock; drvdata = dev_get_drvdata(dev); /* Some subdev didn't probe succesfully id drvdata is NULL */ if (drvdata) { switch (plat_entity) { case IDX_FIMC: ret = register_fimc_entity(fmd, drvdata); break; case IDX_FLITE: ret = register_fimc_lite_entity(fmd, drvdata); break; case IDX_CSIS: ret = register_csis_entity(fmd, pdev, drvdata); break; case IDX_IS_ISP: ret = register_fimc_is_entity(fmd, drvdata); break; default: ret = -ENODEV; } } module_put(dev->driver->owner); dev_unlock: device_unlock(dev); if (ret == -EPROBE_DEFER) dev_info(&fmd->pdev->dev, "deferring %s device registration\n", dev_name(dev)); else if (ret < 0) dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n", dev_name(dev), ret); return ret; } static int fimc_md_pdev_match(struct device *dev, void *data) { struct platform_device *pdev = to_platform_device(dev); int plat_entity = -1; int ret; char *p; if (!get_device(dev)) return -ENODEV; if (!strcmp(pdev->name, CSIS_DRIVER_NAME)) { plat_entity = IDX_CSIS; } else if (!strcmp(pdev->name, FIMC_LITE_DRV_NAME)) { plat_entity = IDX_FLITE; } else { p = strstr(pdev->name, "fimc"); if (p && *(p + 4) == 0) plat_entity = IDX_FIMC; } if (plat_entity >= 0) ret = fimc_md_register_platform_entity(data, pdev, plat_entity); put_device(dev); return 0; } /* Register FIMC, FIMC-LITE and CSIS media entities */ #ifdef CONFIG_OF static int fimc_md_register_of_platform_entities(struct fimc_md *fmd, struct device_node *parent) { struct device_node *node; int ret = 0; for_each_available_child_of_node(parent, node) { struct platform_device *pdev; int plat_entity = -1; pdev = of_find_device_by_node(node); if (!pdev) continue; /* If driver of any entity isn't ready try all again later. */ if (!strcmp(node->name, CSIS_OF_NODE_NAME)) plat_entity = IDX_CSIS; else if (!strcmp(node->name, FIMC_IS_OF_NODE_NAME)) plat_entity = IDX_IS_ISP; else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME)) plat_entity = IDX_FLITE; else if (!strcmp(node->name, FIMC_OF_NODE_NAME) && !of_property_read_bool(node, "samsung,lcd-wb")) plat_entity = IDX_FIMC; if (plat_entity >= 0) ret = fimc_md_register_platform_entity(fmd, pdev, plat_entity); put_device(&pdev->dev); if (ret < 0) break; } return ret; } #else #define fimc_md_register_of_platform_entities(fmd, node) (-ENOSYS) #endif static void fimc_md_unregister_entities(struct fimc_md *fmd) { int i; for (i = 0; i < FIMC_MAX_DEVS; i++) { if (fmd->fimc[i] == NULL) continue; v4l2_device_unregister_subdev(&fmd->fimc[i]->vid_cap.subdev); fmd->fimc[i]->pipeline_ops = NULL; fmd->fimc[i] = NULL; } for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { if (fmd->fimc_lite[i] == NULL) continue; v4l2_device_unregister_subdev(&fmd->fimc_lite[i]->subdev); fmd->fimc_lite[i]->pipeline_ops = NULL; fmd->fimc_lite[i] = NULL; } for (i = 0; i < CSIS_MAX_ENTITIES; i++) { if (fmd->csis[i].sd == NULL) continue; v4l2_device_unregister_subdev(fmd->csis[i].sd); module_put(fmd->csis[i].sd->owner); fmd->csis[i].sd = NULL; } for (i = 0; i < fmd->num_sensors; i++) { if (fmd->sensor[i].subdev == NULL) continue; fimc_md_unregister_sensor(fmd->sensor[i].subdev); fmd->sensor[i].subdev = NULL; } v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n"); } /** * __fimc_md_create_fimc_links - create links to all FIMC entities * @fmd: fimc media device * @source: the source entity to create links to all fimc entities from * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null * @pad: the source entity pad index * @link_mask: bitmask of the fimc devices for which link should be enabled */ static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd, struct media_entity *source, struct v4l2_subdev *sensor, int pad, int link_mask) { struct fimc_source_info *si = NULL; struct media_entity *sink; unsigned int flags = 0; int i, ret = 0; if (sensor) { si = v4l2_get_subdev_hostdata(sensor); /* Skip direct FIMC links in the logical FIMC-IS sensor path */ if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK) ret = 1; } for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) { if (!fmd->fimc[i]) continue; /* * Some FIMC variants are not fitted with camera capture * interface. Skip creating a link from sensor for those. */ if (!fmd->fimc[i]->variant->has_cam_if) continue; flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0; sink = &fmd->fimc[i]->vid_cap.subdev.entity; ret = media_entity_create_link(source, pad, sink, FIMC_SD_PAD_SINK_CAM, flags); if (ret) return ret; /* Notify FIMC capture subdev entity */ ret = media_entity_call(sink, link_setup, &sink->pads[0], &source->pads[pad], flags); if (ret) break; v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n", source->name, flags ? '=' : '-', sink->name); if (flags == 0 || sensor == NULL) continue; if (!WARN_ON(si == NULL)) { unsigned long irq_flags; struct fimc_sensor_info *inf = source_to_sensor_info(si); spin_lock_irqsave(&fmd->slock, irq_flags); inf->host = fmd->fimc[i]; spin_unlock_irqrestore(&fmd->slock, irq_flags); } } for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { if (!fmd->fimc_lite[i]) continue; sink = &fmd->fimc_lite[i]->subdev.entity; ret = media_entity_create_link(source, pad, sink, FLITE_SD_PAD_SINK, 0); if (ret) return ret; /* Notify FIMC-LITE subdev entity */ ret = media_entity_call(sink, link_setup, &sink->pads[0], &source->pads[pad], 0); if (ret) break; v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n", source->name, sink->name); } return 0; } /* Create links from FIMC-LITE source pads to other entities */ static int __fimc_md_create_flite_source_links(struct fimc_md *fmd) { struct media_entity *source, *sink; int i, ret = 0; for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) { struct fimc_lite *fimc = fmd->fimc_lite[i]; if (fimc == NULL) continue; source = &fimc->subdev.entity; sink = &fimc->vfd.entity; /* FIMC-LITE's subdev and video node */ ret = media_entity_create_link(source, FLITE_SD_PAD_SOURCE_DMA, sink, 0, 0); if (ret) break; /* Link from FIMC-LITE to IS-ISP subdev */ sink = &fmd->fimc_is->isp.subdev.entity; ret = media_entity_create_link(source, FLITE_SD_PAD_SOURCE_ISP, sink, 0, 0); if (ret) break; } return ret; } /* Create FIMC-IS links */ static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd) { struct media_entity *source, *sink; int i, ret; source = &fmd->fimc_is->isp.subdev.entity; for (i = 0; i < FIMC_MAX_DEVS; i++) { if (fmd->fimc[i] == NULL) continue; /* Link from IS-ISP subdev to FIMC */ sink = &fmd->fimc[i]->vid_cap.subdev.entity; ret = media_entity_create_link(source, FIMC_ISP_SD_PAD_SRC_FIFO, sink, FIMC_SD_PAD_SINK_FIFO, 0); if (ret) return ret; } return ret; } /** * fimc_md_create_links - create default links between registered entities * * Parallel interface sensor entities are connected directly to FIMC capture * entities. The sensors using MIPI CSIS bus are connected through immutable * link with CSI receiver entity specified by mux_id. Any registered CSIS * entity has a link to each registered FIMC capture entity. Enabled links * are created by default between each subsequent registered sensor and * subsequent FIMC capture entity. The number of default active links is * determined by the number of available sensors or FIMC entities, * whichever is less. */ static int fimc_md_create_links(struct fimc_md *fmd) { struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL }; struct v4l2_subdev *sensor, *csis; struct fimc_source_info *pdata; struct media_entity *source, *sink; int i, pad, fimc_id = 0, ret = 0; u32 flags, link_mask = 0; for (i = 0; i < fmd->num_sensors; i++) { if (fmd->sensor[i].subdev == NULL) continue; sensor = fmd->sensor[i].subdev; pdata = v4l2_get_subdev_hostdata(sensor); if (!pdata) continue; source = NULL; switch (pdata->sensor_bus_type) { case FIMC_BUS_TYPE_MIPI_CSI2: if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES, "Wrong CSI channel id: %d\n", pdata->mux_id)) return -EINVAL; csis = fmd->csis[pdata->mux_id].sd; if (WARN(csis == NULL, "MIPI-CSI interface specified " "but s5p-csis module is not loaded!\n")) return -EINVAL; pad = sensor->entity.num_pads - 1; ret = media_entity_create_link(&sensor->entity, pad, &csis->entity, CSIS_PAD_SINK, MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED); if (ret) return ret; v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n", sensor->entity.name, csis->entity.name); source = NULL; csi_sensors[pdata->mux_id] = sensor; break; case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656: source = &sensor->entity; pad = 0; break; default: v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n", pdata->sensor_bus_type); return -EINVAL; } if (source == NULL) continue; link_mask = 1 << fimc_id++; ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, pad, link_mask); } for (i = 0; i < CSIS_MAX_ENTITIES; i++) { if (fmd->csis[i].sd == NULL) continue; source = &fmd->csis[i].sd->entity; pad = CSIS_PAD_SOURCE; sensor = csi_sensors[i]; link_mask = 1 << fimc_id++; ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor, pad, link_mask); } /* Create immutable links between each FIMC's subdev and video node */ flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED; for (i = 0; i < FIMC_MAX_DEVS; i++) { if (!fmd->fimc[i]) continue; source = &fmd->fimc[i]->vid_cap.subdev.entity; sink = &fmd->fimc[i]->vid_cap.vfd.entity; ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE, sink, 0, flags); if (ret) break; } ret = __fimc_md_create_flite_source_links(fmd); if (ret < 0) return ret; if (fmd->use_isp) ret = __fimc_md_create_fimc_is_links(fmd); return ret; } /* * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management. */ static void fimc_md_put_clocks(struct fimc_md *fmd) { int i = FIMC_MAX_CAMCLKS; while (--i >= 0) { if (IS_ERR(fmd->camclk[i].clock)) continue; clk_unprepare(fmd->camclk[i].clock); clk_put(fmd->camclk[i].clock); fmd->camclk[i].clock = ERR_PTR(-EINVAL); } /* Writeback (PIXELASYNCMx) clocks */ for (i = 0; i < FIMC_MAX_WBCLKS; i++) { if (IS_ERR(fmd->wbclk[i])) continue; clk_put(fmd->wbclk[i]); fmd->wbclk[i] = ERR_PTR(-EINVAL); } } static int fimc_md_get_clocks(struct fimc_md *fmd) { struct device *dev = NULL; char clk_name[32]; struct clk *clock; int ret, i; for (i = 0; i < FIMC_MAX_CAMCLKS; i++) fmd->camclk[i].clock = ERR_PTR(-EINVAL); if (fmd->pdev->dev.of_node) dev = &fmd->pdev->dev; for (i = 0; i < FIMC_MAX_CAMCLKS; i++) { snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i); clock = clk_get(dev, clk_name); if (IS_ERR(clock)) { dev_err(&fmd->pdev->dev, "Failed to get clock: %s\n", clk_name); ret = PTR_ERR(clock); break; } ret = clk_prepare(clock); if (ret < 0) { clk_put(clock); fmd->camclk[i].clock = ERR_PTR(-EINVAL); break; } fmd->camclk[i].clock = clock; } if (ret) fimc_md_put_clocks(fmd); if (!fmd->use_isp) return 0; /* * For now get only PIXELASYNCM1 clock (Writeback B/ISP), * leave PIXELASYNCM0 out for the LCD Writeback driver. */ fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL); for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) { snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i); clock = clk_get(dev, clk_name); if (IS_ERR(clock)) { v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n", clk_name); ret = PTR_ERR(clock); break; } fmd->wbclk[i] = clock; } if (ret) fimc_md_put_clocks(fmd); return ret; } static int __fimc_md_set_camclk(struct fimc_md *fmd, struct fimc_source_info *si, bool on) { struct fimc_camclk_info *camclk; int ret = 0; if (WARN_ON(si->clk_id >= FIMC_MAX_CAMCLKS) || !fmd || !fmd->pmf) return -EINVAL; camclk = &fmd->camclk[si->clk_id]; dbg("camclk %d, f: %lu, use_count: %d, on: %d", si->clk_id, si->clk_frequency, camclk->use_count, on); if (on) { if (camclk->use_count > 0 && camclk->frequency != si->clk_frequency) return -EINVAL; if (camclk->use_count++ == 0) { clk_set_rate(camclk->clock, si->clk_frequency); camclk->frequency = si->clk_frequency; ret = pm_runtime_get_sync(fmd->pmf); if (ret < 0) return ret; ret = clk_enable(camclk->clock); dbg("Enabled camclk %d: f: %lu", si->clk_id, clk_get_rate(camclk->clock)); } return ret; } if (WARN_ON(camclk->use_count == 0)) return 0; if (--camclk->use_count == 0) { clk_disable(camclk->clock); pm_runtime_put(fmd->pmf); dbg("Disabled camclk %d", si->clk_id); } return ret; } /** * fimc_md_set_camclk - peripheral sensor clock setup * @sd: sensor subdev to configure sclk_cam clock for * @on: 1 to enable or 0 to disable the clock * * There are 2 separate clock outputs available in the SoC for external * image processors. These clocks are shared between all registered FIMC * devices to which sensors can be attached, either directly or through * the MIPI CSI receiver. The clock is allowed here to be used by * multiple sensors concurrently if they use same frequency. * This function should only be called when the graph mutex is held. */ int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on) { struct fimc_source_info *si = v4l2_get_subdev_hostdata(sd); struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity); return __fimc_md_set_camclk(fmd, si, on); } static int fimc_md_link_notify(struct media_pad *source, struct media_pad *sink, u32 flags) { struct fimc_lite *fimc_lite = NULL; struct fimc_dev *fimc = NULL; struct fimc_pipeline *pipeline; struct v4l2_subdev *sd; struct mutex *lock; int i, ret = 0; int ref_count; if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV) return 0; sd = media_entity_to_v4l2_subdev(sink->entity); switch (sd->grp_id) { case GRP_ID_FLITE: fimc_lite = v4l2_get_subdevdata(sd); if (WARN_ON(fimc_lite == NULL)) return 0; pipeline = &fimc_lite->pipeline; lock = &fimc_lite->lock; break; case GRP_ID_FIMC: fimc = v4l2_get_subdevdata(sd); if (WARN_ON(fimc == NULL)) return 0; pipeline = &fimc->pipeline; lock = &fimc->lock; break; default: return 0; } mutex_lock(lock); ref_count = fimc ? fimc->vid_cap.refcnt : fimc_lite->ref_count; if (!(flags & MEDIA_LNK_FL_ENABLED)) { if (ref_count > 0) { ret = __fimc_pipeline_close(pipeline); if (!ret && fimc) fimc_ctrls_delete(fimc->vid_cap.ctx); } for (i = 0; i < IDX_MAX; i++) pipeline->subdevs[i] = NULL; } else if (ref_count > 0) { /* * Link activation. Enable power of pipeline elements only if * the pipeline is already in use, i.e. its video node is open. * Recreate the controls destroyed during the link deactivation. */ ret = __fimc_pipeline_open(pipeline, source->entity, true); if (!ret && fimc) ret = fimc_capture_ctrls_create(fimc); } mutex_unlock(lock); return ret ? -EPIPE : ret; } static ssize_t fimc_md_sysfs_show(struct device *dev, struct device_attribute *attr, char *buf) { struct platform_device *pdev = to_platform_device(dev); struct fimc_md *fmd = platform_get_drvdata(pdev); if (fmd->user_subdev_api) return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE); return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE); } static ssize_t fimc_md_sysfs_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct platform_device *pdev = to_platform_device(dev); struct fimc_md *fmd = platform_get_drvdata(pdev); bool subdev_api; int i; if (!strcmp(buf, "vid-dev\n")) subdev_api = false; else if (!strcmp(buf, "sub-dev\n")) subdev_api = true; else return count; fmd->user_subdev_api = subdev_api; for (i = 0; i < FIMC_MAX_DEVS; i++) if (fmd->fimc[i]) fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api; return count; } /* * This device attribute is to select video pipeline configuration method. * There are following valid values: * vid-dev - for V4L2 video node API only, subdevice will be configured * by the host driver. * sub-dev - for media controller API, subdevs must be configured in user * space before starting streaming. */ static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO, fimc_md_sysfs_show, fimc_md_sysfs_store); static int fimc_md_get_pinctrl(struct fimc_md *fmd) { struct device *dev = &fmd->pdev->dev; struct fimc_pinctrl *pctl = &fmd->pinctl; pctl->pinctrl = devm_pinctrl_get(dev); if (IS_ERR(pctl->pinctrl)) return PTR_ERR(pctl->pinctrl); pctl->state_default = pinctrl_lookup_state(pctl->pinctrl, PINCTRL_STATE_DEFAULT); if (IS_ERR(pctl->state_default)) return PTR_ERR(pctl->state_default); pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl, PINCTRL_STATE_IDLE); return 0; } static int fimc_md_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct v4l2_device *v4l2_dev; struct fimc_md *fmd; int ret; fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL); if (!fmd) return -ENOMEM; spin_lock_init(&fmd->slock); fmd->pdev = pdev; strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC", sizeof(fmd->media_dev.model)); fmd->media_dev.link_notify = fimc_md_link_notify; fmd->media_dev.dev = dev; v4l2_dev = &fmd->v4l2_dev; v4l2_dev->mdev = &fmd->media_dev; v4l2_dev->notify = fimc_sensor_notify; strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name)); fmd->use_isp = fimc_md_is_isp_available(dev->of_node); ret = v4l2_device_register(dev, &fmd->v4l2_dev); if (ret < 0) { v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret); return ret; } ret = media_device_register(&fmd->media_dev); if (ret < 0) { v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret); goto err_md; } ret = fimc_md_get_clocks(fmd); if (ret) goto err_clk; fmd->user_subdev_api = (dev->of_node != NULL); /* Protect the media graph while we're registering entities */ mutex_lock(&fmd->media_dev.graph_mutex); ret = fimc_md_get_pinctrl(fmd); if (ret < 0) { if (ret != EPROBE_DEFER) dev_err(dev, "Failed to get pinctrl: %d\n", ret); goto err_unlock; } if (dev->of_node) ret = fimc_md_register_of_platform_entities(fmd, dev->of_node); else ret = bus_for_each_dev(&platform_bus_type, NULL, fmd, fimc_md_pdev_match); if (ret) goto err_unlock; if (dev->platform_data || dev->of_node) { ret = fimc_md_register_sensor_entities(fmd); if (ret) goto err_unlock; } ret = fimc_md_create_links(fmd); if (ret) goto err_unlock; ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev); if (ret) goto err_unlock; ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode); if (ret) goto err_unlock; platform_set_drvdata(pdev, fmd); mutex_unlock(&fmd->media_dev.graph_mutex); return 0; err_unlock: mutex_unlock(&fmd->media_dev.graph_mutex); err_clk: media_device_unregister(&fmd->media_dev); fimc_md_put_clocks(fmd); fimc_md_unregister_entities(fmd); err_md: v4l2_device_unregister(&fmd->v4l2_dev); return ret; } static int fimc_md_remove(struct platform_device *pdev) { struct fimc_md *fmd = platform_get_drvdata(pdev); if (!fmd) return 0; device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode); fimc_md_unregister_entities(fmd); media_device_unregister(&fmd->media_dev); fimc_md_put_clocks(fmd); return 0; } static struct platform_device_id fimc_driver_ids[] __always_unused = { { .name = "s5p-fimc-md" }, { }, }; MODULE_DEVICE_TABLE(platform, fimc_driver_ids); static const struct of_device_id fimc_md_of_match[] = { { .compatible = "samsung,fimc" }, { }, }; MODULE_DEVICE_TABLE(of, fimc_md_of_match); static struct platform_driver fimc_md_driver = { .probe = fimc_md_probe, .remove = fimc_md_remove, .driver = { .of_match_table = of_match_ptr(fimc_md_of_match), .name = "s5p-fimc-md", .owner = THIS_MODULE, } }; static int __init fimc_md_init(void) { int ret; request_module("s5p-csis"); ret = fimc_register_driver(); if (ret) return ret; return platform_driver_register(&fimc_md_driver); } static void __exit fimc_md_exit(void) { platform_driver_unregister(&fimc_md_driver); fimc_unregister_driver(); } module_init(fimc_md_init); module_exit(fimc_md_exit); MODULE_AUTHOR("Sylwester Nawrocki "); MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver"); MODULE_LICENSE("GPL"); MODULE_VERSION("2.0.1");