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linux/linux-5.4.31/drivers/media/platform/qcom/camss/camss.c

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// SPDX-License-Identifier: GPL-2.0
/*
* camss.c
*
* Qualcomm MSM Camera Subsystem - Core
*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
* Copyright (C) 2015-2018 Linaro Ltd.
*/
#include <linux/clk.h>
#include <linux/media-bus-format.h>
#include <linux/media.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/pm_runtime.h>
#include <linux/pm_domain.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/media-device.h>
#include <media/v4l2-async.h>
#include <media/v4l2-device.h>
#include <media/v4l2-mc.h>
#include <media/v4l2-fwnode.h>
#include "camss.h"
#define CAMSS_CLOCK_MARGIN_NUMERATOR 105
#define CAMSS_CLOCK_MARGIN_DENOMINATOR 100
static const struct resources csiphy_res_8x16[] = {
/* CSIPHY0 */
{
.regulator = { NULL },
.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy0_timer" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000 } },
.reg = { "csiphy0", "csiphy0_clk_mux" },
.interrupt = { "csiphy0" }
},
/* CSIPHY1 */
{
.regulator = { NULL },
.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy1_timer" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000 } },
.reg = { "csiphy1", "csiphy1_clk_mux" },
.interrupt = { "csiphy1" }
}
};
static const struct resources csid_res_8x16[] = {
/* CSID0 */
{
.regulator = { "vdda" },
.clock = { "top_ahb", "ispif_ahb", "csi0_ahb", "ahb",
"csi0", "csi0_phy", "csi0_pix", "csi0_rdi" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "csid0" },
.interrupt = { "csid0" }
},
/* CSID1 */
{
.regulator = { "vdda" },
.clock = { "top_ahb", "ispif_ahb", "csi1_ahb", "ahb",
"csi1", "csi1_phy", "csi1_pix", "csi1_rdi" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "csid1" },
.interrupt = { "csid1" }
},
};
static const struct resources_ispif ispif_res_8x16 = {
/* ISPIF */
.clock = { "top_ahb", "ahb", "ispif_ahb",
"csi0", "csi0_pix", "csi0_rdi",
"csi1", "csi1_pix", "csi1_rdi" },
.clock_for_reset = { "vfe0", "csi_vfe0" },
.reg = { "ispif", "csi_clk_mux" },
.interrupt = "ispif"
};
static const struct resources vfe_res_8x16[] = {
/* VFE0 */
{
.regulator = { NULL },
.clock = { "top_ahb", "vfe0", "csi_vfe0",
"vfe_ahb", "vfe_axi", "ahb" },
.clock_rate = { { 0 },
{ 50000000, 80000000, 100000000, 160000000,
177780000, 200000000, 266670000, 320000000,
400000000, 465000000 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "vfe0" },
.interrupt = { "vfe0" }
}
};
static const struct resources csiphy_res_8x96[] = {
/* CSIPHY0 */
{
.regulator = { NULL },
.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy0_timer" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000, 266666667 } },
.reg = { "csiphy0", "csiphy0_clk_mux" },
.interrupt = { "csiphy0" }
},
/* CSIPHY1 */
{
.regulator = { NULL },
.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy1_timer" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000, 266666667 } },
.reg = { "csiphy1", "csiphy1_clk_mux" },
.interrupt = { "csiphy1" }
},
/* CSIPHY2 */
{
.regulator = { NULL },
.clock = { "top_ahb", "ispif_ahb", "ahb", "csiphy2_timer" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000, 266666667 } },
.reg = { "csiphy2", "csiphy2_clk_mux" },
.interrupt = { "csiphy2" }
}
};
static const struct resources csid_res_8x96[] = {
/* CSID0 */
{
.regulator = { "vdda" },
.clock = { "top_ahb", "ispif_ahb", "csi0_ahb", "ahb",
"csi0", "csi0_phy", "csi0_pix", "csi0_rdi" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000, 266666667 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "csid0" },
.interrupt = { "csid0" }
},
/* CSID1 */
{
.regulator = { "vdda" },
.clock = { "top_ahb", "ispif_ahb", "csi1_ahb", "ahb",
"csi1", "csi1_phy", "csi1_pix", "csi1_rdi" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000, 266666667 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "csid1" },
.interrupt = { "csid1" }
},
/* CSID2 */
{
.regulator = { "vdda" },
.clock = { "top_ahb", "ispif_ahb", "csi2_ahb", "ahb",
"csi2", "csi2_phy", "csi2_pix", "csi2_rdi" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000, 266666667 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "csid2" },
.interrupt = { "csid2" }
},
/* CSID3 */
{
.regulator = { "vdda" },
.clock = { "top_ahb", "ispif_ahb", "csi3_ahb", "ahb",
"csi3", "csi3_phy", "csi3_pix", "csi3_rdi" },
.clock_rate = { { 0 },
{ 0 },
{ 0 },
{ 0 },
{ 100000000, 200000000, 266666667 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "csid3" },
.interrupt = { "csid3" }
}
};
static const struct resources_ispif ispif_res_8x96 = {
/* ISPIF */
.clock = { "top_ahb", "ahb", "ispif_ahb",
"csi0", "csi0_pix", "csi0_rdi",
"csi1", "csi1_pix", "csi1_rdi",
"csi2", "csi2_pix", "csi2_rdi",
"csi3", "csi3_pix", "csi3_rdi" },
.clock_for_reset = { "vfe0", "csi_vfe0", "vfe1", "csi_vfe1" },
.reg = { "ispif", "csi_clk_mux" },
.interrupt = "ispif"
};
static const struct resources vfe_res_8x96[] = {
/* VFE0 */
{
.regulator = { NULL },
.clock = { "top_ahb", "ahb", "vfe0", "csi_vfe0", "vfe_ahb",
"vfe0_ahb", "vfe_axi", "vfe0_stream"},
.clock_rate = { { 0 },
{ 0 },
{ 75000000, 100000000, 300000000,
320000000, 480000000, 600000000 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "vfe0" },
.interrupt = { "vfe0" }
},
/* VFE1 */
{
.regulator = { NULL },
.clock = { "top_ahb", "ahb", "vfe1", "csi_vfe1", "vfe_ahb",
"vfe1_ahb", "vfe_axi", "vfe1_stream"},
.clock_rate = { { 0 },
{ 0 },
{ 75000000, 100000000, 300000000,
320000000, 480000000, 600000000 },
{ 0 },
{ 0 },
{ 0 },
{ 0 },
{ 0 } },
.reg = { "vfe1" },
.interrupt = { "vfe1" }
}
};
/*
* camss_add_clock_margin - Add margin to clock frequency rate
* @rate: Clock frequency rate
*
* When making calculations with physical clock frequency values
* some safety margin must be added. Add it.
*/
inline void camss_add_clock_margin(u64 *rate)
{
*rate *= CAMSS_CLOCK_MARGIN_NUMERATOR;
*rate = div_u64(*rate, CAMSS_CLOCK_MARGIN_DENOMINATOR);
}
/*
* camss_enable_clocks - Enable multiple clocks
* @nclocks: Number of clocks in clock array
* @clock: Clock array
* @dev: Device
*
* Return 0 on success or a negative error code otherwise
*/
int camss_enable_clocks(int nclocks, struct camss_clock *clock,
struct device *dev)
{
int ret;
int i;
for (i = 0; i < nclocks; i++) {
ret = clk_prepare_enable(clock[i].clk);
if (ret) {
dev_err(dev, "clock enable failed: %d\n", ret);
goto error;
}
}
return 0;
error:
for (i--; i >= 0; i--)
clk_disable_unprepare(clock[i].clk);
return ret;
}
/*
* camss_disable_clocks - Disable multiple clocks
* @nclocks: Number of clocks in clock array
* @clock: Clock array
*/
void camss_disable_clocks(int nclocks, struct camss_clock *clock)
{
int i;
for (i = nclocks - 1; i >= 0; i--)
clk_disable_unprepare(clock[i].clk);
}
/*
* camss_find_sensor - Find a linked media entity which represents a sensor
* @entity: Media entity to start searching from
*
* Return a pointer to sensor media entity or NULL if not found
*/
struct media_entity *camss_find_sensor(struct media_entity *entity)
{
struct media_pad *pad;
while (1) {
pad = &entity->pads[0];
if (!(pad->flags & MEDIA_PAD_FL_SINK))
return NULL;
pad = media_entity_remote_pad(pad);
if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
return NULL;
entity = pad->entity;
if (entity->function == MEDIA_ENT_F_CAM_SENSOR)
return entity;
}
}
/*
* camss_get_pixel_clock - Get pixel clock rate from sensor
* @entity: Media entity in the current pipeline
* @pixel_clock: Received pixel clock value
*
* Return 0 on success or a negative error code otherwise
*/
int camss_get_pixel_clock(struct media_entity *entity, u32 *pixel_clock)
{
struct media_entity *sensor;
struct v4l2_subdev *subdev;
struct v4l2_ctrl *ctrl;
sensor = camss_find_sensor(entity);
if (!sensor)
return -ENODEV;
subdev = media_entity_to_v4l2_subdev(sensor);
ctrl = v4l2_ctrl_find(subdev->ctrl_handler, V4L2_CID_PIXEL_RATE);
if (!ctrl)
return -EINVAL;
*pixel_clock = v4l2_ctrl_g_ctrl_int64(ctrl);
return 0;
}
int camss_pm_domain_on(struct camss *camss, int id)
{
if (camss->version == CAMSS_8x96) {
camss->genpd_link[id] = device_link_add(camss->dev,
camss->genpd[id], DL_FLAG_STATELESS |
DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE);
if (!camss->genpd_link[id])
return -EINVAL;
}
return 0;
}
void camss_pm_domain_off(struct camss *camss, int id)
{
if (camss->version == CAMSS_8x96)
device_link_del(camss->genpd_link[id]);
}
/*
* camss_of_parse_endpoint_node - Parse port endpoint node
* @dev: Device
* @node: Device node to be parsed
* @csd: Parsed data from port endpoint node
*
* Return 0 on success or a negative error code on failure
*/
static int camss_of_parse_endpoint_node(struct device *dev,
struct device_node *node,
struct camss_async_subdev *csd)
{
struct csiphy_lanes_cfg *lncfg = &csd->interface.csi2.lane_cfg;
struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2;
struct v4l2_fwnode_endpoint vep = { { 0 } };
unsigned int i;
v4l2_fwnode_endpoint_parse(of_fwnode_handle(node), &vep);
csd->interface.csiphy_id = vep.base.port;
mipi_csi2 = &vep.bus.mipi_csi2;
lncfg->clk.pos = mipi_csi2->clock_lane;
lncfg->clk.pol = mipi_csi2->lane_polarities[0];
lncfg->num_data = mipi_csi2->num_data_lanes;
lncfg->data = devm_kcalloc(dev,
lncfg->num_data, sizeof(*lncfg->data),
GFP_KERNEL);
if (!lncfg->data)
return -ENOMEM;
for (i = 0; i < lncfg->num_data; i++) {
lncfg->data[i].pos = mipi_csi2->data_lanes[i];
lncfg->data[i].pol = mipi_csi2->lane_polarities[i + 1];
}
return 0;
}
/*
* camss_of_parse_ports - Parse ports node
* @dev: Device
* @notifier: v4l2_device notifier data
*
* Return number of "port" nodes found in "ports" node
*/
static int camss_of_parse_ports(struct camss *camss)
{
struct device *dev = camss->dev;
struct device_node *node = NULL;
struct device_node *remote = NULL;
int ret, num_subdevs = 0;
for_each_endpoint_of_node(dev->of_node, node) {
struct camss_async_subdev *csd;
struct v4l2_async_subdev *asd;
if (!of_device_is_available(node))
continue;
remote = of_graph_get_remote_port_parent(node);
if (!remote) {
dev_err(dev, "Cannot get remote parent\n");
ret = -EINVAL;
goto err_cleanup;
}
asd = v4l2_async_notifier_add_fwnode_subdev(
&camss->notifier, of_fwnode_handle(remote),
sizeof(*csd));
of_node_put(remote);
if (IS_ERR(asd)) {
ret = PTR_ERR(asd);
goto err_cleanup;
}
csd = container_of(asd, struct camss_async_subdev, asd);
ret = camss_of_parse_endpoint_node(dev, node, csd);
if (ret < 0)
goto err_cleanup;
num_subdevs++;
}
return num_subdevs;
err_cleanup:
v4l2_async_notifier_cleanup(&camss->notifier);
of_node_put(node);
return ret;
}
/*
* camss_init_subdevices - Initialize subdev structures and resources
* @camss: CAMSS device
*
* Return 0 on success or a negative error code on failure
*/
static int camss_init_subdevices(struct camss *camss)
{
const struct resources *csiphy_res;
const struct resources *csid_res;
const struct resources_ispif *ispif_res;
const struct resources *vfe_res;
unsigned int i;
int ret;
if (camss->version == CAMSS_8x16) {
csiphy_res = csiphy_res_8x16;
csid_res = csid_res_8x16;
ispif_res = &ispif_res_8x16;
vfe_res = vfe_res_8x16;
} else if (camss->version == CAMSS_8x96) {
csiphy_res = csiphy_res_8x96;
csid_res = csid_res_8x96;
ispif_res = &ispif_res_8x96;
vfe_res = vfe_res_8x96;
} else {
return -EINVAL;
}
for (i = 0; i < camss->csiphy_num; i++) {
ret = msm_csiphy_subdev_init(camss, &camss->csiphy[i],
&csiphy_res[i], i);
if (ret < 0) {
dev_err(camss->dev,
"Failed to init csiphy%d sub-device: %d\n",
i, ret);
return ret;
}
}
for (i = 0; i < camss->csid_num; i++) {
ret = msm_csid_subdev_init(camss, &camss->csid[i],
&csid_res[i], i);
if (ret < 0) {
dev_err(camss->dev,
"Failed to init csid%d sub-device: %d\n",
i, ret);
return ret;
}
}
ret = msm_ispif_subdev_init(&camss->ispif, ispif_res);
if (ret < 0) {
dev_err(camss->dev, "Failed to init ispif sub-device: %d\n",
ret);
return ret;
}
for (i = 0; i < camss->vfe_num; i++) {
ret = msm_vfe_subdev_init(camss, &camss->vfe[i],
&vfe_res[i], i);
if (ret < 0) {
dev_err(camss->dev,
"Fail to init vfe%d sub-device: %d\n", i, ret);
return ret;
}
}
return 0;
}
/*
* camss_register_entities - Register subdev nodes and create links
* @camss: CAMSS device
*
* Return 0 on success or a negative error code on failure
*/
static int camss_register_entities(struct camss *camss)
{
int i, j, k;
int ret;
for (i = 0; i < camss->csiphy_num; i++) {
ret = msm_csiphy_register_entity(&camss->csiphy[i],
&camss->v4l2_dev);
if (ret < 0) {
dev_err(camss->dev,
"Failed to register csiphy%d entity: %d\n",
i, ret);
goto err_reg_csiphy;
}
}
for (i = 0; i < camss->csid_num; i++) {
ret = msm_csid_register_entity(&camss->csid[i],
&camss->v4l2_dev);
if (ret < 0) {
dev_err(camss->dev,
"Failed to register csid%d entity: %d\n",
i, ret);
goto err_reg_csid;
}
}
ret = msm_ispif_register_entities(&camss->ispif, &camss->v4l2_dev);
if (ret < 0) {
dev_err(camss->dev, "Failed to register ispif entities: %d\n",
ret);
goto err_reg_ispif;
}
for (i = 0; i < camss->vfe_num; i++) {
ret = msm_vfe_register_entities(&camss->vfe[i],
&camss->v4l2_dev);
if (ret < 0) {
dev_err(camss->dev,
"Failed to register vfe%d entities: %d\n",
i, ret);
goto err_reg_vfe;
}
}
for (i = 0; i < camss->csiphy_num; i++) {
for (j = 0; j < camss->csid_num; j++) {
ret = media_create_pad_link(
&camss->csiphy[i].subdev.entity,
MSM_CSIPHY_PAD_SRC,
&camss->csid[j].subdev.entity,
MSM_CSID_PAD_SINK,
0);
if (ret < 0) {
dev_err(camss->dev,
"Failed to link %s->%s entities: %d\n",
camss->csiphy[i].subdev.entity.name,
camss->csid[j].subdev.entity.name,
ret);
goto err_link;
}
}
}
for (i = 0; i < camss->csid_num; i++) {
for (j = 0; j < camss->ispif.line_num; j++) {
ret = media_create_pad_link(
&camss->csid[i].subdev.entity,
MSM_CSID_PAD_SRC,
&camss->ispif.line[j].subdev.entity,
MSM_ISPIF_PAD_SINK,
0);
if (ret < 0) {
dev_err(camss->dev,
"Failed to link %s->%s entities: %d\n",
camss->csid[i].subdev.entity.name,
camss->ispif.line[j].subdev.entity.name,
ret);
goto err_link;
}
}
}
for (i = 0; i < camss->ispif.line_num; i++)
for (k = 0; k < camss->vfe_num; k++)
for (j = 0; j < ARRAY_SIZE(camss->vfe[k].line); j++) {
ret = media_create_pad_link(
&camss->ispif.line[i].subdev.entity,
MSM_ISPIF_PAD_SRC,
&camss->vfe[k].line[j].subdev.entity,
MSM_VFE_PAD_SINK,
0);
if (ret < 0) {
dev_err(camss->dev,
"Failed to link %s->%s entities: %d\n",
camss->ispif.line[i].subdev.entity.name,
camss->vfe[k].line[j].subdev.entity.name,
ret);
goto err_link;
}
}
return 0;
err_link:
i = camss->vfe_num;
err_reg_vfe:
for (i--; i >= 0; i--)
msm_vfe_unregister_entities(&camss->vfe[i]);
msm_ispif_unregister_entities(&camss->ispif);
err_reg_ispif:
i = camss->csid_num;
err_reg_csid:
for (i--; i >= 0; i--)
msm_csid_unregister_entity(&camss->csid[i]);
i = camss->csiphy_num;
err_reg_csiphy:
for (i--; i >= 0; i--)
msm_csiphy_unregister_entity(&camss->csiphy[i]);
return ret;
}
/*
* camss_unregister_entities - Unregister subdev nodes
* @camss: CAMSS device
*
* Return 0 on success or a negative error code on failure
*/
static void camss_unregister_entities(struct camss *camss)
{
unsigned int i;
for (i = 0; i < camss->csiphy_num; i++)
msm_csiphy_unregister_entity(&camss->csiphy[i]);
for (i = 0; i < camss->csid_num; i++)
msm_csid_unregister_entity(&camss->csid[i]);
msm_ispif_unregister_entities(&camss->ispif);
for (i = 0; i < camss->vfe_num; i++)
msm_vfe_unregister_entities(&camss->vfe[i]);
}
static int camss_subdev_notifier_bound(struct v4l2_async_notifier *async,
struct v4l2_subdev *subdev,
struct v4l2_async_subdev *asd)
{
struct camss *camss = container_of(async, struct camss, notifier);
struct camss_async_subdev *csd =
container_of(asd, struct camss_async_subdev, asd);
u8 id = csd->interface.csiphy_id;
struct csiphy_device *csiphy = &camss->csiphy[id];
csiphy->cfg.csi2 = &csd->interface.csi2;
subdev->host_priv = csiphy;
return 0;
}
static int camss_subdev_notifier_complete(struct v4l2_async_notifier *async)
{
struct camss *camss = container_of(async, struct camss, notifier);
struct v4l2_device *v4l2_dev = &camss->v4l2_dev;
struct v4l2_subdev *sd;
int ret;
list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
if (sd->host_priv) {
struct media_entity *sensor = &sd->entity;
struct csiphy_device *csiphy =
(struct csiphy_device *) sd->host_priv;
struct media_entity *input = &csiphy->subdev.entity;
unsigned int i;
for (i = 0; i < sensor->num_pads; i++) {
if (sensor->pads[i].flags & MEDIA_PAD_FL_SOURCE)
break;
}
if (i == sensor->num_pads) {
dev_err(camss->dev,
"No source pad in external entity\n");
return -EINVAL;
}
ret = media_create_pad_link(sensor, i,
input, MSM_CSIPHY_PAD_SINK,
MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
if (ret < 0) {
dev_err(camss->dev,
"Failed to link %s->%s entities: %d\n",
sensor->name, input->name, ret);
return ret;
}
}
}
ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev);
if (ret < 0)
return ret;
return media_device_register(&camss->media_dev);
}
static const struct v4l2_async_notifier_operations camss_subdev_notifier_ops = {
.bound = camss_subdev_notifier_bound,
.complete = camss_subdev_notifier_complete,
};
static const struct media_device_ops camss_media_ops = {
.link_notify = v4l2_pipeline_link_notify,
};
/*
* camss_probe - Probe CAMSS platform device
* @pdev: Pointer to CAMSS platform device
*
* Return 0 on success or a negative error code on failure
*/
static int camss_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct camss *camss;
int num_subdevs, ret;
camss = kzalloc(sizeof(*camss), GFP_KERNEL);
if (!camss)
return -ENOMEM;
atomic_set(&camss->ref_count, 0);
camss->dev = dev;
platform_set_drvdata(pdev, camss);
if (of_device_is_compatible(dev->of_node, "qcom,msm8916-camss")) {
camss->version = CAMSS_8x16;
camss->csiphy_num = 2;
camss->csid_num = 2;
camss->vfe_num = 1;
} else if (of_device_is_compatible(dev->of_node,
"qcom,msm8996-camss")) {
camss->version = CAMSS_8x96;
camss->csiphy_num = 3;
camss->csid_num = 4;
camss->vfe_num = 2;
} else {
return -EINVAL;
}
camss->csiphy = devm_kcalloc(dev, camss->csiphy_num,
sizeof(*camss->csiphy), GFP_KERNEL);
if (!camss->csiphy)
return -ENOMEM;
camss->csid = devm_kcalloc(dev, camss->csid_num, sizeof(*camss->csid),
GFP_KERNEL);
if (!camss->csid)
return -ENOMEM;
camss->vfe = devm_kcalloc(dev, camss->vfe_num, sizeof(*camss->vfe),
GFP_KERNEL);
if (!camss->vfe)
return -ENOMEM;
v4l2_async_notifier_init(&camss->notifier);
num_subdevs = camss_of_parse_ports(camss);
if (num_subdevs < 0)
return num_subdevs;
ret = camss_init_subdevices(camss);
if (ret < 0)
goto err_cleanup;
ret = dma_set_mask_and_coherent(dev, 0xffffffff);
if (ret)
goto err_cleanup;
camss->media_dev.dev = camss->dev;
strscpy(camss->media_dev.model, "Qualcomm Camera Subsystem",
sizeof(camss->media_dev.model));
camss->media_dev.ops = &camss_media_ops;
media_device_init(&camss->media_dev);
camss->v4l2_dev.mdev = &camss->media_dev;
ret = v4l2_device_register(camss->dev, &camss->v4l2_dev);
if (ret < 0) {
dev_err(dev, "Failed to register V4L2 device: %d\n", ret);
goto err_cleanup;
}
ret = camss_register_entities(camss);
if (ret < 0)
goto err_register_entities;
if (num_subdevs) {
camss->notifier.ops = &camss_subdev_notifier_ops;
ret = v4l2_async_notifier_register(&camss->v4l2_dev,
&camss->notifier);
if (ret) {
dev_err(dev,
"Failed to register async subdev nodes: %d\n",
ret);
goto err_register_subdevs;
}
} else {
ret = v4l2_device_register_subdev_nodes(&camss->v4l2_dev);
if (ret < 0) {
dev_err(dev, "Failed to register subdev nodes: %d\n",
ret);
goto err_register_subdevs;
}
ret = media_device_register(&camss->media_dev);
if (ret < 0) {
dev_err(dev, "Failed to register media device: %d\n",
ret);
goto err_register_subdevs;
}
}
if (camss->version == CAMSS_8x96) {
camss->genpd[PM_DOMAIN_VFE0] = dev_pm_domain_attach_by_id(
camss->dev, PM_DOMAIN_VFE0);
if (IS_ERR(camss->genpd[PM_DOMAIN_VFE0]))
return PTR_ERR(camss->genpd[PM_DOMAIN_VFE0]);
camss->genpd[PM_DOMAIN_VFE1] = dev_pm_domain_attach_by_id(
camss->dev, PM_DOMAIN_VFE1);
if (IS_ERR(camss->genpd[PM_DOMAIN_VFE1])) {
dev_pm_domain_detach(camss->genpd[PM_DOMAIN_VFE0],
true);
return PTR_ERR(camss->genpd[PM_DOMAIN_VFE1]);
}
}
pm_runtime_enable(dev);
return 0;
err_register_subdevs:
camss_unregister_entities(camss);
err_register_entities:
v4l2_device_unregister(&camss->v4l2_dev);
err_cleanup:
v4l2_async_notifier_cleanup(&camss->notifier);
return ret;
}
void camss_delete(struct camss *camss)
{
v4l2_device_unregister(&camss->v4l2_dev);
media_device_unregister(&camss->media_dev);
media_device_cleanup(&camss->media_dev);
pm_runtime_disable(camss->dev);
if (camss->version == CAMSS_8x96) {
dev_pm_domain_detach(camss->genpd[PM_DOMAIN_VFE0], true);
dev_pm_domain_detach(camss->genpd[PM_DOMAIN_VFE1], true);
}
kfree(camss);
}
/*
* camss_remove - Remove CAMSS platform device
* @pdev: Pointer to CAMSS platform device
*
* Always returns 0.
*/
static int camss_remove(struct platform_device *pdev)
{
unsigned int i;
struct camss *camss = platform_get_drvdata(pdev);
for (i = 0; i < camss->vfe_num; i++)
msm_vfe_stop_streaming(&camss->vfe[i]);
v4l2_async_notifier_unregister(&camss->notifier);
v4l2_async_notifier_cleanup(&camss->notifier);
camss_unregister_entities(camss);
if (atomic_read(&camss->ref_count) == 0)
camss_delete(camss);
return 0;
}
static const struct of_device_id camss_dt_match[] = {
{ .compatible = "qcom,msm8916-camss" },
{ .compatible = "qcom,msm8996-camss" },
{ }
};
MODULE_DEVICE_TABLE(of, camss_dt_match);
static int __maybe_unused camss_runtime_suspend(struct device *dev)
{
return 0;
}
static int __maybe_unused camss_runtime_resume(struct device *dev)
{
return 0;
}
static const struct dev_pm_ops camss_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(camss_runtime_suspend, camss_runtime_resume, NULL)
};
static struct platform_driver qcom_camss_driver = {
.probe = camss_probe,
.remove = camss_remove,
.driver = {
.name = "qcom-camss",
.of_match_table = camss_dt_match,
.pm = &camss_pm_ops,
},
};
module_platform_driver(qcom_camss_driver);
MODULE_ALIAS("platform:qcom-camss");
MODULE_DESCRIPTION("Qualcomm Camera Subsystem driver");
MODULE_AUTHOR("Todor Tomov <todor.tomov@linaro.org>");
MODULE_LICENSE("GPL v2");
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