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linux-sg2042/drivers/media/platform/exynos4-is/media-dev.c

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/*
* 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/drv-intf/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 || !is_media_entity_v4l2_subdev(pad->entity))
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_enable - enable power of all pipeline subdevs
* and the sensor clock
* @ep: video pipeline structure
* @fmd: fimc media device
*
* Called with the graph mutex held.
*/
static int __fimc_pipeline_enable(struct exynos_media_pipeline *ep,
struct fimc_md *fmd)
{
struct fimc_pipeline *p = to_fimc_pipeline(ep);
int ret;
/* Enable 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_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;
if (WARN_ON(p == NULL || me == NULL))
return -EINVAL;
if (prepare)
fimc_pipeline_prepare(p, me);
sd = p->subdevs[IDX_SENSOR];
if (sd == NULL) {
pr_warn("%s(): No sensor subdev\n", __func__);
/*
* Pipeline open cannot fail so as to make it possible
* for the user space to configure the pipeline.
*/
return 0;
}
return __fimc_pipeline_enable(ep, fmd);
}
/**
* __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);
struct fimc_md *fmd = entity_to_fimc_mdev(&p->subdevs[IDX_CSIS]->entity);
enum fimc_subdev_index sd_id;
int i, ret = 0;
if (p->subdevs[IDX_SENSOR] == NULL) {
if (!fmd->user_subdev_api) {
/*
* Sensor must be already discovered if we
* aren't in the user_subdev_api mode
*/
return -ENODEV;
}
/* Get pipeline sink entity */
if (p->subdevs[IDX_FIMC])
sd_id = IDX_FIMC;
else if (p->subdevs[IDX_IS_ISP])
sd_id = IDX_IS_ISP;
else if (p->subdevs[IDX_FLITE])
sd_id = IDX_FLITE;
else
return -ENODEV;
/*
* Sensor could have been linked between open and STREAMON -
* check if this is the case.
*/
fimc_pipeline_prepare(p, &p->subdevs[sd_id]->entity);
if (p->subdevs[IDX_SENSOR] == NULL)
return -ENODEV;
ret = __fimc_pipeline_enable(ep, fmd);
if (ret < 0)
return ret;
}
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:
fimc_pipeline_s_power(p, !on);
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;
int ret;
/* Assume here a port node can have only one endpoint node. */
ep = of_get_next_child(port, NULL);
if (!ep)
return 0;
ret = v4l2_of_parse_endpoint(ep, &endpoint);
if (ret) {
of_node_put(ep);
return ret;
}
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))) {
of_node_put(rem);
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) {
of_node_put(node);
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) {
of_node_put(node);
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) {
of_node_put(node);
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_create_pad_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_create_pad_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_create_pad_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_create_pad_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_create_pad_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_create_pad_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_create_pad_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_create_pad_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->graph_obj.mdev->graph_mutex mutex held. */
static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
struct media_entity_graph *graph)
{
struct media_entity *entity_err = entity;
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 (!is_media_entity_v4l2_video_device(entity))
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 (!is_media_entity_v4l2_video_device(entity_err))
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_graph *graph =
&container_of(link->graph_obj.mdev, struct fimc_md,
media_dev)->link_setup_graph;
struct media_entity *sink = link->sink->entity;
int ret = 0;
/* Before link disconnection */
if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
ret = media_entity_graph_walk_init(graph,
link->graph_obj.mdev);
if (ret)
return ret;
if (!(flags & MEDIA_LNK_FL_ENABLED))
ret = __fimc_md_modify_pipelines(sink, false, graph);
#if 0
else
/* TODO: Link state change validation */
#endif
/* After link activation */
} else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
if (link->flags & MEDIA_LNK_FL_ENABLED)
ret = __fimc_md_modify_pipelines(sink, true, graph);
media_entity_graph_walk_cleanup(graph);
}
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);
if (ret < 0)
return ret;
return media_device_register(&fmd->media_dev);
}
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;
media_device_init(&fmd->media_dev);
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 = 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);
ret = fimc_md_register_platform_entities(fmd, dev->of_node);
if (ret)
goto err_clk;
ret = fimc_md_register_sensor_entities(fmd);
if (ret)
goto err_m_ent;
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_cleanup(&fmd->media_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);
media_device_cleanup(&fmd->media_dev);
fimc_md_put_clocks(fmd);
return 0;
}
static const 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");
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