summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/media/platform/exynos4-is/media-dev.c
diff options
context:
space:
mode:
authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/media/platform/exynos4-is/media-dev.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/media/platform/exynos4-is/media-dev.c')
-rw-r--r--kernel/drivers/media/platform/exynos4-is/media-dev.c1499
1 files changed, 1499 insertions, 0 deletions
diff --git a/kernel/drivers/media/platform/exynos4-is/media-dev.c b/kernel/drivers/media/platform/exynos4-is/media-dev.c
new file mode 100644
index 000000000..f315ef946
--- /dev/null
+++ b/kernel/drivers/media/platform/exynos4-is/media-dev.c
@@ -0,0 +1,1499 @@
+/*
+ * S5P/EXYNOS4 SoC series camera host interface media device driver
+ *
+ * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
+ * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
+ *
+ * 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/bug.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-of.h>
+#include <media/media-device.h>
+#include <media/exynos-fimc.h>
+
+#include "media-dev.h"
+#include "fimc-core.h"
+#include "fimc-is.h"
+#include "fimc-lite.h"
+#include "mipi-csis.h"
+
+/* Set up image sensor subdev -> FIMC capture node notifications. */
+static void __setup_sensor_notification(struct fimc_md *fmd,
+ struct v4l2_subdev *sensor,
+ struct v4l2_subdev *fimc_sd)
+{
+ struct fimc_source_info *src_inf;
+ struct fimc_sensor_info *md_si;
+ unsigned long flags;
+
+ src_inf = v4l2_get_subdev_hostdata(sensor);
+ if (!src_inf || WARN_ON(fmd == NULL))
+ return;
+
+ md_si = source_to_sensor_info(src_inf);
+ spin_lock_irqsave(&fmd->slock, flags);
+ md_si->host = v4l2_get_subdevdata(fimc_sd);
+ spin_unlock_irqrestore(&fmd->slock, flags);
+}
+
+/**
+ * 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 fimc_md *fmd = entity_to_fimc_mdev(me);
+ struct v4l2_subdev *sd;
+ struct v4l2_subdev *sensor = NULL;
+ 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_pad(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_SENSOR:
+ sensor = sd;
+ /* fall through */
+ case GRP_ID_FIMC_IS_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:
+ p->subdevs[IDX_FIMC] = sd;
+ break;
+ case GRP_ID_FIMC_IS:
+ p->subdevs[IDX_IS_ISP] = sd;
+ break;
+ default:
+ break;
+ }
+ me = &sd->entity;
+ if (me->num_pads == 1)
+ break;
+ }
+
+ if (sensor && p->subdevs[IDX_FIMC])
+ __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]);
+}
+
+/**
+ * __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 exynos_media_pipeline *ep,
+ struct media_entity *me, bool prepare)
+{
+ struct fimc_md *fmd = entity_to_fimc_mdev(me);
+ struct fimc_pipeline *p = to_fimc_pipeline(ep);
+ 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_pipeline_s_power(p, 1);
+ if (!ret)
+ return 0;
+
+ 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 exynos_media_pipeline *ep)
+{
+ struct fimc_pipeline *p = to_fimc_pipeline(ep);
+ struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
+ struct fimc_md *fmd;
+ int ret;
+
+ if (sd == NULL) {
+ pr_warn("%s(): No sensor subdev\n", __func__);
+ return 0;
+ }
+
+ ret = fimc_pipeline_s_power(p, 0);
+
+ 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 exynos_media_pipeline *ep, 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 },
+ };
+ struct fimc_pipeline *p = to_fimc_pipeline(ep);
+ 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 exynos_media_pipeline_ops fimc_pipeline_ops = {
+ .open = __fimc_pipeline_open,
+ .close = __fimc_pipeline_close,
+ .set_stream = __fimc_pipeline_s_stream,
+};
+
+static struct exynos_media_pipeline *fimc_md_pipeline_create(
+ struct fimc_md *fmd)
+{
+ struct fimc_pipeline *p;
+
+ p = kzalloc(sizeof(*p), GFP_KERNEL);
+ if (!p)
+ return NULL;
+
+ list_add_tail(&p->list, &fmd->pipelines);
+
+ p->ep.ops = &fimc_pipeline_ops;
+ return &p->ep;
+}
+
+static void fimc_md_pipelines_free(struct fimc_md *fmd)
+{
+ while (!list_empty(&fmd->pipelines)) {
+ struct fimc_pipeline *p;
+
+ p = list_entry(fmd->pipelines.next, typeof(*p), list);
+ list_del(&p->list);
+ kfree(p);
+ }
+}
+
+/* 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 fimc_source_info *pd = &fmd->sensor[index].pdata;
+ struct device_node *rem, *ep, *np;
+ struct v4l2_of_endpoint endpoint;
+
+ /* 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.base.port == 0) || index >= FIMC_MAX_SENSORS)
+ return -EINVAL;
+
+ pd->mux_id = (endpoint.base.port - 1) & 0x1;
+
+ rem = of_graph_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 (fimc_input_is_parallel(endpoint.base.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.base.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.base.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;
+
+ if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor)))
+ return -EINVAL;
+
+ fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF;
+ fmd->sensor[index].asd.match.of.node = rem;
+ fmd->async_subdevs[index] = &fmd->sensor[index].asd;
+
+ fmd->num_sensors++;
+
+ of_node_put(rem);
+ return 0;
+}
+
+/* Register all SoC external sub-devices */
+static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
+{
+ struct device_node *parent = fmd->pdev->dev.of_node;
+ struct device_node *node, *ports;
+ int index = 0;
+ int ret;
+
+ /*
+ * 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;
+
+ fmd->num_sensors = 0;
+
+ /* 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)
+ goto rpm_put;
+ index++;
+ }
+
+ /* Attach sensors listed in the parallel-ports node */
+ ports = of_get_child_by_name(parent, "parallel-ports");
+ if (!ports)
+ goto rpm_put;
+
+ for_each_child_of_node(ports, node) {
+ ret = fimc_md_parse_port_node(fmd, node, index);
+ if (ret < 0)
+ break;
+ index++;
+ }
+rpm_put:
+ pm_runtime_put(fmd->pmf);
+ return ret;
+}
+
+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", &reg);
+ return reg - FIMC_INPUT_MIPI_CSI2_0;
+}
+
+/*
+ * 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;
+ struct exynos_media_pipeline *ep;
+ 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;
+
+ ep = fimc_md_pipeline_create(fmd);
+ if (!ep)
+ return -ENOMEM;
+
+ v4l2_set_subdev_hostdata(sd, ep);
+
+ 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;
+ struct exynos_media_pipeline *ep;
+ 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;
+
+ ep = fimc_md_pipeline_create(fmd);
+ if (!ep)
+ return -ENOMEM;
+
+ v4l2_set_subdev_hostdata(sd, ep);
+
+ 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;
+ struct exynos_media_pipeline *ep;
+ int ret;
+
+ /* Allocate pipeline object for the ISP capture video node. */
+ ep = fimc_md_pipeline_create(fmd);
+ if (!ep)
+ return -ENOMEM;
+
+ v4l2_set_subdev_hostdata(sd, ep);
+
+ 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 successfully 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;
+}
+
+/* Register FIMC, FIMC-LITE and CSIS media entities */
+static int fimc_md_register_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;
+}
+
+static void fimc_md_unregister_entities(struct fimc_md *fmd)
+{
+ int i;
+
+ for (i = 0; i < FIMC_MAX_DEVS; i++) {
+ struct fimc_dev *dev = fmd->fimc[i];
+ if (dev == NULL)
+ continue;
+ v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
+ dev->vid_cap.ve.pipe = NULL;
+ fmd->fimc[i] = NULL;
+ }
+ for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
+ struct fimc_lite *dev = fmd->fimc_lite[i];
+ if (dev == NULL)
+ continue;
+ v4l2_device_unregister_subdev(&dev->subdev);
+ dev->ve.pipe = 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);
+ fmd->csis[i].sd = NULL;
+ }
+
+ if (fmd->fimc_is)
+ v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
+
+ 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);
+ }
+
+ 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->ve.vdev.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 fimc_isp *isp = &fmd->fimc_is->isp;
+ struct media_entity *source, *sink;
+ int i, ret;
+
+ source = &isp->subdev.entity;
+
+ for (i = 0; i < FIMC_MAX_DEVS; i++) {
+ if (fmd->fimc[i] == NULL)
+ continue;
+
+ /* Link from FIMC-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;
+ }
+
+ /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
+ sink = &isp->video_capture.ve.vdev.entity;
+
+ /* Skip this link if the fimc-is-isp video node driver isn't built-in */
+ if (sink->num_pads == 0)
+ return 0;
+
+ return media_entity_create_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
+ sink, 0, 0);
+}
+
+/**
+ * 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.ve.vdev.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_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 = &fmd->pdev->dev;
+ char clk_name[32];
+ struct clk *clock;
+ int i, ret = 0;
+
+ for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
+ fmd->camclk[i].clock = ERR_PTR(-EINVAL);
+
+ 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(dev, "Failed to get clock: %s\n", clk_name);
+ ret = PTR_ERR(clock);
+ 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_modify_pipeline(struct media_entity *entity, bool enable)
+{
+ struct exynos_video_entity *ve;
+ struct fimc_pipeline *p;
+ struct video_device *vdev;
+ int ret;
+
+ vdev = media_entity_to_video_device(entity);
+ if (vdev->entity.use_count == 0)
+ return 0;
+
+ ve = vdev_to_exynos_video_entity(vdev);
+ p = to_fimc_pipeline(ve->pipe);
+ /*
+ * Nothing to do if we are disabling the pipeline, some link
+ * has been disconnected and p->subdevs array is cleared now.
+ */
+ if (!enable && p->subdevs[IDX_SENSOR] == NULL)
+ return 0;
+
+ if (enable)
+ ret = __fimc_pipeline_open(ve->pipe, entity, true);
+ else
+ ret = __fimc_pipeline_close(ve->pipe);
+
+ if (ret == 0 && !enable)
+ memset(p->subdevs, 0, sizeof(p->subdevs));
+
+ return ret;
+}
+
+/* Locking: called with entity->parent->graph_mutex mutex held. */
+static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable)
+{
+ struct media_entity *entity_err = entity;
+ struct media_entity_graph graph;
+ int ret;
+
+ /*
+ * Walk current graph and call the pipeline open/close routine for each
+ * opened video node that belongs to the graph of entities connected
+ * through active links. This is needed as we cannot power on/off the
+ * subdevs in random order.
+ */
+ media_entity_graph_walk_start(&graph, entity);
+
+ while ((entity = media_entity_graph_walk_next(&graph))) {
+ if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
+ continue;
+
+ ret = __fimc_md_modify_pipeline(entity, enable);
+
+ if (ret < 0)
+ goto err;
+ }
+
+ return 0;
+ err:
+ media_entity_graph_walk_start(&graph, entity_err);
+
+ while ((entity_err = media_entity_graph_walk_next(&graph))) {
+ if (media_entity_type(entity_err) != MEDIA_ENT_T_DEVNODE)
+ continue;
+
+ __fimc_md_modify_pipeline(entity_err, !enable);
+
+ if (entity_err == entity)
+ break;
+ }
+
+ return ret;
+}
+
+static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
+ unsigned int notification)
+{
+ struct media_entity *sink = link->sink->entity;
+ int ret = 0;
+
+ /* Before link disconnection */
+ if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
+ if (!(flags & MEDIA_LNK_FL_ENABLED))
+ ret = __fimc_md_modify_pipelines(sink, false);
+#if 0
+ else
+ /* TODO: Link state change validation */
+#endif
+ /* After link activation */
+ } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
+ (link->flags & MEDIA_LNK_FL_ENABLED)) {
+ ret = __fimc_md_modify_pipelines(sink, true);
+ }
+
+ return ret ? -EPIPE : 0;
+}
+
+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 cam_clk_prepare(struct clk_hw *hw)
+{
+ struct cam_clk *camclk = to_cam_clk(hw);
+ int ret;
+
+ if (camclk->fmd->pmf == NULL)
+ return -ENODEV;
+
+ ret = pm_runtime_get_sync(camclk->fmd->pmf);
+ return ret < 0 ? ret : 0;
+}
+
+static void cam_clk_unprepare(struct clk_hw *hw)
+{
+ struct cam_clk *camclk = to_cam_clk(hw);
+
+ if (camclk->fmd->pmf == NULL)
+ return;
+
+ pm_runtime_put_sync(camclk->fmd->pmf);
+}
+
+static const struct clk_ops cam_clk_ops = {
+ .prepare = cam_clk_prepare,
+ .unprepare = cam_clk_unprepare,
+};
+
+static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
+{
+ struct cam_clk_provider *cp = &fmd->clk_provider;
+ unsigned int i;
+
+ if (cp->of_node)
+ of_clk_del_provider(cp->of_node);
+
+ for (i = 0; i < cp->num_clocks; i++)
+ clk_unregister(cp->clks[i]);
+}
+
+static int fimc_md_register_clk_provider(struct fimc_md *fmd)
+{
+ struct cam_clk_provider *cp = &fmd->clk_provider;
+ struct device *dev = &fmd->pdev->dev;
+ int i, ret;
+
+ for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
+ struct cam_clk *camclk = &cp->camclk[i];
+ struct clk_init_data init;
+ const char *p_name;
+
+ ret = of_property_read_string_index(dev->of_node,
+ "clock-output-names", i, &init.name);
+ if (ret < 0)
+ break;
+
+ p_name = __clk_get_name(fmd->camclk[i].clock);
+
+ /* It's safe since clk_register() will duplicate the string. */
+ init.parent_names = &p_name;
+ init.num_parents = 1;
+ init.ops = &cam_clk_ops;
+ init.flags = CLK_SET_RATE_PARENT;
+ camclk->hw.init = &init;
+ camclk->fmd = fmd;
+
+ cp->clks[i] = clk_register(NULL, &camclk->hw);
+ if (IS_ERR(cp->clks[i])) {
+ dev_err(dev, "failed to register clock: %s (%ld)\n",
+ init.name, PTR_ERR(cp->clks[i]));
+ ret = PTR_ERR(cp->clks[i]);
+ goto err;
+ }
+ cp->num_clocks++;
+ }
+
+ if (cp->num_clocks == 0) {
+ dev_warn(dev, "clk provider not registered\n");
+ return 0;
+ }
+
+ cp->clk_data.clks = cp->clks;
+ cp->clk_data.clk_num = cp->num_clocks;
+ cp->of_node = dev->of_node;
+ ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
+ &cp->clk_data);
+ if (ret == 0)
+ return 0;
+err:
+ fimc_md_unregister_clk_provider(fmd);
+ return ret;
+}
+
+static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct fimc_md *fmd = notifier_to_fimc_md(notifier);
+ struct fimc_sensor_info *si = NULL;
+ int i;
+
+ /* Find platform data for this sensor subdev */
+ for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
+ if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node)
+ si = &fmd->sensor[i];
+
+ if (si == NULL)
+ return -EINVAL;
+
+ v4l2_set_subdev_hostdata(subdev, &si->pdata);
+
+ if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
+ subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
+ else
+ subdev->grp_id = GRP_ID_SENSOR;
+
+ si->subdev = subdev;
+
+ v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
+ subdev->name, fmd->num_sensors);
+
+ fmd->num_sensors++;
+
+ return 0;
+}
+
+static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
+{
+ struct fimc_md *fmd = notifier_to_fimc_md(notifier);
+ int ret;
+
+ mutex_lock(&fmd->media_dev.graph_mutex);
+
+ ret = fimc_md_create_links(fmd);
+ if (ret < 0)
+ goto unlock;
+
+ ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
+unlock:
+ mutex_unlock(&fmd->media_dev.graph_mutex);
+ return ret;
+}
+
+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);
+ INIT_LIST_HEAD(&fmd->pipelines);
+ 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);
+ fmd->user_subdev_api = true;
+
+ 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_v4l2_dev;
+ }
+
+ ret = fimc_md_get_clocks(fmd);
+ if (ret)
+ goto err_md;
+
+ 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_clk;
+ }
+
+ platform_set_drvdata(pdev, fmd);
+
+ /* Protect the media graph while we're registering entities */
+ mutex_lock(&fmd->media_dev.graph_mutex);
+
+ ret = fimc_md_register_platform_entities(fmd, dev->of_node);
+ if (ret) {
+ mutex_unlock(&fmd->media_dev.graph_mutex);
+ goto err_clk;
+ }
+
+ ret = fimc_md_register_sensor_entities(fmd);
+ if (ret) {
+ mutex_unlock(&fmd->media_dev.graph_mutex);
+ goto err_m_ent;
+ }
+
+ mutex_unlock(&fmd->media_dev.graph_mutex);
+
+ ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
+ if (ret)
+ goto err_m_ent;
+ /*
+ * FIMC platform devices need to be registered before the sclk_cam
+ * clocks provider, as one of these devices needs to be activated
+ * to enable the clock.
+ */
+ ret = fimc_md_register_clk_provider(fmd);
+ if (ret < 0) {
+ v4l2_err(v4l2_dev, "clock provider registration failed\n");
+ goto err_attr;
+ }
+
+ if (fmd->num_sensors > 0) {
+ fmd->subdev_notifier.subdevs = fmd->async_subdevs;
+ fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
+ fmd->subdev_notifier.bound = subdev_notifier_bound;
+ fmd->subdev_notifier.complete = subdev_notifier_complete;
+ fmd->num_sensors = 0;
+
+ ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
+ &fmd->subdev_notifier);
+ if (ret)
+ goto err_clk_p;
+ }
+
+ return 0;
+
+err_clk_p:
+ fimc_md_unregister_clk_provider(fmd);
+err_attr:
+ device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
+err_clk:
+ fimc_md_put_clocks(fmd);
+err_m_ent:
+ fimc_md_unregister_entities(fmd);
+err_md:
+ media_device_unregister(&fmd->media_dev);
+err_v4l2_dev:
+ 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;
+
+ fimc_md_unregister_clk_provider(fmd);
+ v4l2_async_notifier_unregister(&fmd->subdev_notifier);
+
+ v4l2_device_unregister(&fmd->v4l2_dev);
+ device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
+ fimc_md_unregister_entities(fmd);
+ fimc_md_pipelines_free(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",
+ }
+};
+
+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 <s.nawrocki@samsung.com>");
+MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("2.0.1");