linux/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/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/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-of.h>
#include <media/media-device.h>
#include <media/s5p_fimc.h>
#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);
/* 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_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 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);
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 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);
}
}
/*
* 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->dev.driver ||
!try_module_get(client->dev.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->dev.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", &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;
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;
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 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;
}
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 {
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++) {
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;
}
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;
}
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 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.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 = NULL;
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);
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;
}
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,
[media] s5p-fimc: Prevent lock-up in multiple sensor systems The camera clocks managed by the driver were improperly reference counted and remained disabled when multiple video nodes were opened simultaneously. It manifested itself with following warning: [12.920000] WARNING: at drivers/media/video/s5p-fimc/fimc-mdevice.c:787 __fimc_md_set_camclk+0x1c0/0x1dc() [13.005000] Modules linked in: [13.005000] Backtrace: [13.040000] [<c0013084>] (dump_backtrace+0x0/0x10c) from [<c0454b70>] (dump_stack+0x18/0x1c) [13.070000] r7:00000009 r6:00000313 r5:c02d576c r4:00000000 [13.155000] [<c0454b58>] (dump_stack+0x0/0x1c) from [<c0022ec4>] (warn_slowpath_common+0x54/0x6c) [13.285000] [<c0022e70>] (warn_slowpath_common+0x0/0x6c) from [<c0022f00>] (warn_slowpath_null+0x24/0x2c) [13.360000] r9:e1981010 r8:00000000 r7:c061d3fc r6:e1981010 r5:e1981030 [13.430000] r4:00000000 [13.430000] [<c0022edc>] (warn_slowpath_null+0x0/0x2c) from [<c02d576c>] (__fimc_md_set_camclk+0x1c0/0x1dc) [13.550000] [<c02d55ac>] (__fimc_md_set_camclk+0x0/0x1dc) from [<c02d57b0>] (fimc_md_set_camclk+0x28/0x2c) [13.630000] [<c02d5788>] (fimc_md_set_camclk+0x0/0x2c) from [<c02d57e8>] (__fimc_pipeline_shutdown+0x34/0x50) [13.705000] [<c02d57b4>] (__fimc_pipeline_shutdown+0x0/0x50) from [<c02d5844>] (fimc_pipeline_shutdown+0x40/0x58) [13.765000] r5:e2391200 r4:e2357704 [13.805000] [<c02d5804>] (fimc_pipeline_shutdown+0x0/0x58) from [<c02d4754>] (fimc_capture_close+0xcc/0xe4) [13.915000] r5:e1b396c0 r4:e2357410 [13.915000] [<c02d4688>] (fimc_capture_close+0x0/0xe4) from [<c02b2d5c>] (v4l2_release+0x5c/0x80) [13.970000] r7:00000010 r6:e1d2d990 r5:e1b396c0 r4:e2394800 [14.000000] [<c02b2d00>] (v4l2_release+0x0/0x80) from [<c00b66cc>] (fput+0xc0/0x22c) [14.015000] r5:c157ef30 r4:e1b396c0 [14.015000] [<c00b660c>] (fput+0x0/0x22c) from [<c00b2ca0>] (filp_close+0x60/0x80) [14.080000] [<c00b2c40>] (filp_close+0x0/0x80) from [<c00b2d78>] (sys_close+0xb8/0xf4) [14.125000] r7:00000001 r6:e1b396c0 r5:c1400340 r4:c1400300 [14.125000] [<c00b2cc0>] (sys_close+0x0/0xf4) from [<c000f300>] (ret_fast_syscall+0x0/0x30) [14.205000] r7:00000006 r6:beee5b94 r5:00000003 r4:b6f64fac Fix this, as well as potential memory leaks due to not calling v4l2_fh_release() on some error paths. Also remove some error logs printed for events that aren't critical and are normal conditions for some system configurations. Also check if the device have been properly run-time enabled during video node open. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-17 17:22:10 +00:00
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];
[media] s5p-fimc: Prevent lock-up in multiple sensor systems The camera clocks managed by the driver were improperly reference counted and remained disabled when multiple video nodes were opened simultaneously. It manifested itself with following warning: [12.920000] WARNING: at drivers/media/video/s5p-fimc/fimc-mdevice.c:787 __fimc_md_set_camclk+0x1c0/0x1dc() [13.005000] Modules linked in: [13.005000] Backtrace: [13.040000] [<c0013084>] (dump_backtrace+0x0/0x10c) from [<c0454b70>] (dump_stack+0x18/0x1c) [13.070000] r7:00000009 r6:00000313 r5:c02d576c r4:00000000 [13.155000] [<c0454b58>] (dump_stack+0x0/0x1c) from [<c0022ec4>] (warn_slowpath_common+0x54/0x6c) [13.285000] [<c0022e70>] (warn_slowpath_common+0x0/0x6c) from [<c0022f00>] (warn_slowpath_null+0x24/0x2c) [13.360000] r9:e1981010 r8:00000000 r7:c061d3fc r6:e1981010 r5:e1981030 [13.430000] r4:00000000 [13.430000] [<c0022edc>] (warn_slowpath_null+0x0/0x2c) from [<c02d576c>] (__fimc_md_set_camclk+0x1c0/0x1dc) [13.550000] [<c02d55ac>] (__fimc_md_set_camclk+0x0/0x1dc) from [<c02d57b0>] (fimc_md_set_camclk+0x28/0x2c) [13.630000] [<c02d5788>] (fimc_md_set_camclk+0x0/0x2c) from [<c02d57e8>] (__fimc_pipeline_shutdown+0x34/0x50) [13.705000] [<c02d57b4>] (__fimc_pipeline_shutdown+0x0/0x50) from [<c02d5844>] (fimc_pipeline_shutdown+0x40/0x58) [13.765000] r5:e2391200 r4:e2357704 [13.805000] [<c02d5804>] (fimc_pipeline_shutdown+0x0/0x58) from [<c02d4754>] (fimc_capture_close+0xcc/0xe4) [13.915000] r5:e1b396c0 r4:e2357410 [13.915000] [<c02d4688>] (fimc_capture_close+0x0/0xe4) from [<c02b2d5c>] (v4l2_release+0x5c/0x80) [13.970000] r7:00000010 r6:e1d2d990 r5:e1b396c0 r4:e2394800 [14.000000] [<c02b2d00>] (v4l2_release+0x0/0x80) from [<c00b66cc>] (fput+0xc0/0x22c) [14.015000] r5:c157ef30 r4:e1b396c0 [14.015000] [<c00b660c>] (fput+0x0/0x22c) from [<c00b2ca0>] (filp_close+0x60/0x80) [14.080000] [<c00b2c40>] (filp_close+0x0/0x80) from [<c00b2d78>] (sys_close+0xb8/0xf4) [14.125000] r7:00000001 r6:e1b396c0 r5:c1400340 r4:c1400300 [14.125000] [<c00b2cc0>] (sys_close+0x0/0xf4) from [<c000f300>] (ret_fast_syscall+0x0/0x30) [14.205000] r7:00000006 r6:beee5b94 r5:00000003 r4:b6f64fac Fix this, as well as potential memory leaks due to not calling v4l2_fh_release() on some error paths. Also remove some error logs printed for events that aren't critical and are normal conditions for some system configurations. Also check if the device have been properly run-time enabled during video node open. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-17 17:22:10 +00:00
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_prepare_enable(camclk->clock);
dbg("Enabled camclk %d: f: %lu", si->clk_id,
[media] s5p-fimc: Prevent lock-up in multiple sensor systems The camera clocks managed by the driver were improperly reference counted and remained disabled when multiple video nodes were opened simultaneously. It manifested itself with following warning: [12.920000] WARNING: at drivers/media/video/s5p-fimc/fimc-mdevice.c:787 __fimc_md_set_camclk+0x1c0/0x1dc() [13.005000] Modules linked in: [13.005000] Backtrace: [13.040000] [<c0013084>] (dump_backtrace+0x0/0x10c) from [<c0454b70>] (dump_stack+0x18/0x1c) [13.070000] r7:00000009 r6:00000313 r5:c02d576c r4:00000000 [13.155000] [<c0454b58>] (dump_stack+0x0/0x1c) from [<c0022ec4>] (warn_slowpath_common+0x54/0x6c) [13.285000] [<c0022e70>] (warn_slowpath_common+0x0/0x6c) from [<c0022f00>] (warn_slowpath_null+0x24/0x2c) [13.360000] r9:e1981010 r8:00000000 r7:c061d3fc r6:e1981010 r5:e1981030 [13.430000] r4:00000000 [13.430000] [<c0022edc>] (warn_slowpath_null+0x0/0x2c) from [<c02d576c>] (__fimc_md_set_camclk+0x1c0/0x1dc) [13.550000] [<c02d55ac>] (__fimc_md_set_camclk+0x0/0x1dc) from [<c02d57b0>] (fimc_md_set_camclk+0x28/0x2c) [13.630000] [<c02d5788>] (fimc_md_set_camclk+0x0/0x2c) from [<c02d57e8>] (__fimc_pipeline_shutdown+0x34/0x50) [13.705000] [<c02d57b4>] (__fimc_pipeline_shutdown+0x0/0x50) from [<c02d5844>] (fimc_pipeline_shutdown+0x40/0x58) [13.765000] r5:e2391200 r4:e2357704 [13.805000] [<c02d5804>] (fimc_pipeline_shutdown+0x0/0x58) from [<c02d4754>] (fimc_capture_close+0xcc/0xe4) [13.915000] r5:e1b396c0 r4:e2357410 [13.915000] [<c02d4688>] (fimc_capture_close+0x0/0xe4) from [<c02b2d5c>] (v4l2_release+0x5c/0x80) [13.970000] r7:00000010 r6:e1d2d990 r5:e1b396c0 r4:e2394800 [14.000000] [<c02b2d00>] (v4l2_release+0x0/0x80) from [<c00b66cc>] (fput+0xc0/0x22c) [14.015000] r5:c157ef30 r4:e1b396c0 [14.015000] [<c00b660c>] (fput+0x0/0x22c) from [<c00b2ca0>] (filp_close+0x60/0x80) [14.080000] [<c00b2c40>] (filp_close+0x0/0x80) from [<c00b2d78>] (sys_close+0xb8/0xf4) [14.125000] r7:00000001 r6:e1b396c0 r5:c1400340 r4:c1400300 [14.125000] [<c00b2cc0>] (sys_close+0x0/0xf4) from [<c000f300>] (ret_fast_syscall+0x0/0x30) [14.205000] r7:00000006 r6:beee5b94 r5:00000003 r4:b6f64fac Fix this, as well as potential memory leaks due to not calling v4l2_fh_release() on some error paths. Also remove some error logs printed for events that aren't critical and are normal conditions for some system configurations. Also check if the device have been properly run-time enabled during video node open. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-05-17 17:22:10 +00:00
clk_get_rate(camclk->clock));
}
return ret;
}
if (WARN_ON(camclk->use_count == 0))
return 0;
if (--camclk->use_count == 0) {
clk_disable_unprepare(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_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);
else
; /* TODO: Link state change validation */
/* 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 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;
INIT_LIST_HEAD(&fmd->pipelines);
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:
fimc_md_put_clocks(fmd);
fimc_md_unregister_entities(fmd);
[media] exynos4-is: Fix entity unregistration on error path This patch corrects media entities unregistration order to make sure the fimc.N.capture and fimc-lite video nodes are unregistered with fimc->lock mutex held. This prevents races between video device open() and defered probing and NULL pointer dereference in open() callback as follows: [ 77.645000] Unable to handle kernel NULL pointer dereference at virtual address 00000290t [ 77.655000] pgd = ee7a8000 [ 77.660000] [00000290] *pgd=6e13c831, *pte=00000000, *ppte=00000000 [ 77.665000] Internal error: Oops: 17 [#1] PREEMPT SMP ARM [ 77.670000] Modules linked in: s5p_fimc ipv6 exynos_fimc_is exynos_fimc_lite s5p_csis v4l2_mem2mem videobuf2_dma_contig videobuf2_memops exynos4_is_common videobuf2_core [last unloaded: s5p_fimc] [ 77.685000] CPU: 0 PID : 2998 Comm: v4l_id Tainted: G W 3.10.0-next-20130709-00039-g39f491b-dirty #1548 [ 77.695000] task: ee084000 ti: ee46e000 task.ti: ee46e000 [ 77.700000] PC is at __mutex_lock_slowpath+0x54/0x368 [ 77.705000] LR is at __mutex_lock_slowpath+0x24/0x368 [ 77.710000] pc : [<c038dc10>] lr : [<c038dbe0>] psr: 60000093 [ 77.710000] sp : ee46fd70 ip : 000008c8 fp : c054e34c [ 77.725000] r10: ee084000 r9 : 00000000 r8 : ee439480 [ 77.730000] r7 : ee46e000 r6 : 60000013 r5 : 00000290 r4 : 0000028c [ 77.735000] r3 : 00000000 r2 : 00000000 r1 : 20000093 r0 : 00000001 [ 77.740000] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment user [ 77.750000] Control: 10c5387d Table: 6e7a804a DAC: 00000015 [ 77.755000] Process v4l_id (pid: 2998, stack limit = 0xee46e238) [ 77.760000] Stack: (0xee46fd70 to 0xee470000) ... [ 77.935000] [<c038dc10>] (__mutex_lock_slowpath+0x54/0x368) from [<c038df30>] (mutex_lock+0xc/0x24) [ 77.945000] [<c038df30>] (mutex_lock+0xc/0x24) from [<bf03fa90>] (fimc_lite_open+0x12c/0x2bc [exynos_fimc_lite]) [ 77.955000] [<bf03fa90>] (fimc_lite_open+0x12c/0x2bc [exynos_fimc_lite]) from [<c02ab11c>] (v4l2_open+0xa0/0xe0) [ 77.965000] [<c02ab11c>] (v4l2_open+0xa0/0xe0) from [<c00b1de4>] (chrdev_open+0x88/0x170) [ 77.975000] [<c00b1de4>] (chrdev_open+0x88/0x170) from [<c00ac710>] (do_dentry_open.isra.14+0x1d8/0x258) [ 77.985000] [<c00ac710>] (do_dentry_open.isra.14+0x1d8/0x258) from [<c00ac860>] (finish_open+0x20/0x38) [ 77.995000] [<c00ac860>] (finish_open+0x20/0x38) from [<c00ba658>] (do_last.isra.43+0x538/0xb1c) [ 78.000000] [<c00ba658>] (do_last.isra.43+0x538/0xb1c) from [<c00bacf0>] (path_openat+0xb4/0x5c4) [ 78.010000] [<c00bacf0>] (path_openat+0xb4/0x5c4) from [<c00bb4b4>] (do_filp_open+0x2c/0x80) [ 78.020000] [<c00bb4b4>] (do_filp_open+0x2c/0x80) from [<c00ad744>] (do_sys_open+0xf4/0x1a8) [ 78.025000] [<c00ad744>] (do_sys_open+0xf4/0x1a8) from [<c000e320>] (ret_fast_syscall+0x0/0x30) [ 78.035000] Code: 1a000093 e10f6000 f10c0080 e2845004 (e1953f9f) Reported-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com> Cc: stable@vger.kernel.org
2013-07-29 09:53:59 +00:00
media_device_unregister(&fmd->media_dev);
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;
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",
.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 <s.nawrocki@samsung.com>");
MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
MODULE_LICENSE("GPL");
MODULE_VERSION("2.0.1");