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media: v4l: fwnode: Let the caller provide V4L2 fwnode endpoint 

Instead of allocating the V4L2 fwnode endpoint in
v4l2_fwnode_endpoint_alloc_parse, let the caller to do this. This allows
setting default parameters for the endpoint which is a very common need
for drivers.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Tested-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Tested-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Sakari Ailus 2018-06-02 12:19:35 -04:00 committed by Mauro Carvalho Chehab
parent 2d95e7ed07
commit 6970d37cc9
5 changed files with 60 additions and 65 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/media/i2c/ov2659.c
View File

@ -1347,8 +1347,9 @@ static struct ov2659_platform_data *
ov2659_get_pdata(struct i2c_client *client)
{
struct ov2659_platform_data *pdata;
struct v4l2_fwnode_endpoint *bus_cfg;
struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 };
struct device_node *endpoint;
int ret;
if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
return client->dev.platform_data;
@ -1357,8 +1358,9 @@ ov2659_get_pdata(struct i2c_client *client)
if (!endpoint)
return NULL;
bus_cfg = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(endpoint));
if (IS_ERR(bus_cfg)) {
ret = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(endpoint),
&bus_cfg);
if (ret) {
pdata = NULL;
goto done;
}
@ -1367,17 +1369,17 @@ ov2659_get_pdata(struct i2c_client *client)
if (!pdata)
goto done;
if (!bus_cfg->nr_of_link_frequencies) {
if (!bus_cfg.nr_of_link_frequencies) {
dev_err(&client->dev,
"link-frequencies property not found or too many\n");
pdata = NULL;
goto done;
}
pdata->link_frequency = bus_cfg->link_frequencies[0];
pdata->link_frequency = bus_cfg.link_frequencies[0];
done:
v4l2_fwnode_endpoint_free(bus_cfg);
v4l2_fwnode_endpoint_free(&bus_cfg);
of_node_put(endpoint);
return pdata;
}

26
drivers/media/i2c/smiapp/smiapp-core.c
View File

@ -2757,7 +2757,7 @@ static int __maybe_unused smiapp_resume(struct device *dev)
static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev)
{
struct smiapp_hwconfig *hwcfg;
struct v4l2_fwnode_endpoint *bus_cfg;
struct v4l2_fwnode_endpoint bus_cfg = { .bus_type = 0 };
struct fwnode_handle *ep;
struct fwnode_handle *fwnode = dev_fwnode(dev);
u32 rotation;
@ -2771,27 +2771,27 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev)
if (!ep)
return NULL;
bus_cfg = v4l2_fwnode_endpoint_alloc_parse(ep);
if (IS_ERR(bus_cfg))
rval = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
if (rval)
goto out_err;
hwcfg = devm_kzalloc(dev, sizeof(*hwcfg), GFP_KERNEL);
if (!hwcfg)
goto out_err;
switch (bus_cfg->bus_type) {
switch (bus_cfg.bus_type) {
case V4L2_MBUS_CSI2_DPHY:
hwcfg->csi_signalling_mode = SMIAPP_CSI_SIGNALLING_MODE_CSI2;
hwcfg->lanes = bus_cfg->bus.mipi_csi2.num_data_lanes;
hwcfg->lanes = bus_cfg.bus.mipi_csi2.num_data_lanes;
break;
case V4L2_MBUS_CCP2:
hwcfg->csi_signalling_mode = (bus_cfg->bus.mipi_csi1.strobe) ?
hwcfg->csi_signalling_mode = (bus_cfg.bus.mipi_csi1.strobe) ?
SMIAPP_CSI_SIGNALLING_MODE_CCP2_DATA_STROBE :
SMIAPP_CSI_SIGNALLING_MODE_CCP2_DATA_CLOCK;
hwcfg->lanes = 1;
break;
default:
dev_err(dev, "unsupported bus %u\n", bus_cfg->bus_type);
dev_err(dev, "unsupported bus %u\n", bus_cfg.bus_type);
goto out_err;
}
@ -2823,28 +2823,28 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev)
dev_dbg(dev, "nvm %d, clk %d, mode %d\n",
hwcfg->nvm_size, hwcfg->ext_clk, hwcfg->csi_signalling_mode);
if (!bus_cfg->nr_of_link_frequencies) {
if (!bus_cfg.nr_of_link_frequencies) {
dev_warn(dev, "no link frequencies defined\n");
goto out_err;
}
hwcfg->op_sys_clock = devm_kcalloc(
dev, bus_cfg->nr_of_link_frequencies + 1 /* guardian */,
dev, bus_cfg.nr_of_link_frequencies + 1 /* guardian */,
sizeof(*hwcfg->op_sys_clock), GFP_KERNEL);
if (!hwcfg->op_sys_clock)
goto out_err;
for (i = 0; i < bus_cfg->nr_of_link_frequencies; i++) {
hwcfg->op_sys_clock[i] = bus_cfg->link_frequencies[i];
for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++) {
hwcfg->op_sys_clock[i] = bus_cfg.link_frequencies[i];
dev_dbg(dev, "freq %d: %lld\n", i, hwcfg->op_sys_clock[i]);
}
v4l2_fwnode_endpoint_free(bus_cfg);
v4l2_fwnode_endpoint_free(&bus_cfg);
fwnode_handle_put(ep);
return hwcfg;
out_err:
v4l2_fwnode_endpoint_free(bus_cfg);
v4l2_fwnode_endpoint_free(&bus_cfg);
fwnode_handle_put(ep);
return NULL;
}

26
drivers/media/i2c/tc358743.c
View File

@ -1895,11 +1895,11 @@ static void tc358743_gpio_reset(struct tc358743_state *state)
static int tc358743_probe_of(struct tc358743_state *state)
{
struct device *dev = &state->i2c_client->dev;
struct v4l2_fwnode_endpoint *endpoint;
struct v4l2_fwnode_endpoint endpoint = { .bus_type = 0 };
struct device_node *ep;
struct clk *refclk;
u32 bps_pr_lane;
int ret = -EINVAL;
int ret;
refclk = devm_clk_get(dev, "refclk");
if (IS_ERR(refclk)) {
@ -1915,26 +1915,28 @@ static int tc358743_probe_of(struct tc358743_state *state)
return -EINVAL;
}
endpoint = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep));
if (IS_ERR(endpoint)) {
ret = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep), &endpoint);
if (ret) {
dev_err(dev, "failed to parse endpoint\n");
ret = PTR_ERR(endpoint);
ret = ret;
goto put_node;
}
if (endpoint->bus_type != V4L2_MBUS_CSI2_DPHY ||
endpoint->bus.mipi_csi2.num_data_lanes == 0 ||
endpoint->nr_of_link_frequencies == 0) {
if (endpoint.bus_type != V4L2_MBUS_CSI2_DPHY ||
endpoint.bus.mipi_csi2.num_data_lanes == 0 ||
endpoint.nr_of_link_frequencies == 0) {
dev_err(dev, "missing CSI-2 properties in endpoint\n");
ret = -EINVAL;
goto free_endpoint;
}
if (endpoint->bus.mipi_csi2.num_data_lanes > 4) {
if (endpoint.bus.mipi_csi2.num_data_lanes > 4) {
dev_err(dev, "invalid number of lanes\n");
ret = -EINVAL;
goto free_endpoint;
}
state->bus = endpoint->bus.mipi_csi2;
state->bus = endpoint.bus.mipi_csi2;
ret = clk_prepare_enable(refclk);
if (ret) {
@ -1967,7 +1969,7 @@ static int tc358743_probe_of(struct tc358743_state *state)
* The CSI bps per lane must be between 62.5 Mbps and 1 Gbps.
* The default is 594 Mbps for 4-lane 1080p60 or 2-lane 720p60.
*/
bps_pr_lane = 2 * endpoint->link_frequencies[0];
bps_pr_lane = 2 * endpoint.link_frequencies[0];
if (bps_pr_lane < 62500000U || bps_pr_lane > 1000000000U) {
dev_err(dev, "unsupported bps per lane: %u bps\n", bps_pr_lane);
goto disable_clk;
@ -2013,7 +2015,7 @@ static int tc358743_probe_of(struct tc358743_state *state)
disable_clk:
clk_disable_unprepare(refclk);
free_endpoint:
v4l2_fwnode_endpoint_free(endpoint);
v4l2_fwnode_endpoint_free(&endpoint);
put_node:
of_node_put(ep);
return ret;

49
drivers/media/v4l2-core/v4l2-fwnode.c
View File

@ -290,23 +290,17 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep)
return;
kfree(vep->link_frequencies);
kfree(vep);
}
EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_free);
struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
struct fwnode_handle *fwnode)
int v4l2_fwnode_endpoint_alloc_parse(
struct fwnode_handle *fwnode, struct v4l2_fwnode_endpoint *vep)
{
struct v4l2_fwnode_endpoint *vep;
int rval;
vep = kzalloc(sizeof(*vep), GFP_KERNEL);
if (!vep)
return ERR_PTR(-ENOMEM);
rval = __v4l2_fwnode_endpoint_parse(fwnode, vep);
if (rval < 0)
goto out_err;
return rval;
rval = fwnode_property_read_u64_array(fwnode, "link-frequencies",
NULL, 0);
@ -316,18 +310,18 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
vep->link_frequencies =
kmalloc_array(rval, sizeof(*vep->link_frequencies),
GFP_KERNEL);
if (!vep->link_frequencies) {
rval = -ENOMEM;
goto out_err;
}
if (!vep->link_frequencies)
return -ENOMEM;
vep->nr_of_link_frequencies = rval;
rval = fwnode_property_read_u64_array(
fwnode, "link-frequencies", vep->link_frequencies,
vep->nr_of_link_frequencies);
if (rval < 0)
goto out_err;
if (rval < 0) {
v4l2_fwnode_endpoint_free(vep);
return rval;
}
for (i = 0; i < vep->nr_of_link_frequencies; i++)
pr_info("link-frequencies %u value %llu\n", i,
@ -336,11 +330,7 @@ struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
pr_debug("===== end V4L2 endpoint properties\n");
return vep;
out_err:
v4l2_fwnode_endpoint_free(vep);
return ERR_PTR(rval);
return 0;
}
EXPORT_SYMBOL_GPL(v4l2_fwnode_endpoint_alloc_parse);
@ -392,9 +382,9 @@ static int v4l2_async_notifier_fwnode_parse_endpoint(
struct v4l2_fwnode_endpoint *vep,
struct v4l2_async_subdev *asd))
{
struct v4l2_fwnode_endpoint vep = { .bus_type = 0 };
struct v4l2_async_subdev *asd;
struct v4l2_fwnode_endpoint *vep;
int ret = 0;
int ret;
asd = kzalloc(asd_struct_size, GFP_KERNEL);
if (!asd)
@ -409,23 +399,22 @@ static int v4l2_async_notifier_fwnode_parse_endpoint(
goto out_err;
}
vep = v4l2_fwnode_endpoint_alloc_parse(endpoint);
if (IS_ERR(vep)) {
ret = PTR_ERR(vep);
ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &vep);
if (ret) {
dev_warn(dev, "unable to parse V4L2 fwnode endpoint (%d)\n",
ret);
goto out_err;
}
ret = parse_endpoint ? parse_endpoint(dev, vep, asd) : 0;
ret = parse_endpoint ? parse_endpoint(dev, &vep, asd) : 0;
if (ret == -ENOTCONN)
dev_dbg(dev, "ignoring port@%u/endpoint@%u\n", vep->base.port,
vep->base.id);
dev_dbg(dev, "ignoring port@%u/endpoint@%u\n", vep.base.port,
vep.base.id);
else if (ret < 0)
dev_warn(dev,
"driver could not parse port@%u/endpoint@%u (%d)\n",
vep->base.port, vep->base.id, ret);
v4l2_fwnode_endpoint_free(vep);
vep.base.port, vep.base.id, ret);
v4l2_fwnode_endpoint_free(&vep);
if (ret < 0)
goto out_err;

10
include/media/v4l2-fwnode.h
View File

@ -161,6 +161,7 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep);
/**
* v4l2_fwnode_endpoint_alloc_parse() - parse all fwnode node properties
* @fwnode: pointer to the endpoint's fwnode handle
* @vep: pointer to the V4L2 fwnode data structure
*
* All properties are optional. If none are found, we don't set any flags. This
* means the port has a static configuration and no properties have to be
@ -170,6 +171,8 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep);
* set the V4L2_MBUS_CSI2_CONTINUOUS_CLOCK flag. The caller should hold a
* reference to @fwnode.
*
* The caller must set the bus_type field of @vep to zero.
*
* v4l2_fwnode_endpoint_alloc_parse() has two important differences to
* v4l2_fwnode_endpoint_parse():
*
@ -178,11 +181,10 @@ void v4l2_fwnode_endpoint_free(struct v4l2_fwnode_endpoint *vep);
* 2. The memory it has allocated to store the variable size data must be freed
* using v4l2_fwnode_endpoint_free() when no longer needed.
*
* Return: Pointer to v4l2_fwnode_endpoint if successful, on an error pointer
* on error.
* Return: 0 on success or a negative error code on failure.
*/
struct v4l2_fwnode_endpoint *v4l2_fwnode_endpoint_alloc_parse(
struct fwnode_handle *fwnode);
int v4l2_fwnode_endpoint_alloc_parse(
struct fwnode_handle *fwnode, struct v4l2_fwnode_endpoint *vep);
/**
* v4l2_fwnode_parse_link() - parse a link between two endpoints