[PATCH v5 06/11] media: rockchip: rkcif: add driver for mipi csi-2 host

Michael Riesch
2025-03-06T17:08:58Z

The Rockchip RK3568 MIPI CSI-2 Host is a CSI-2 bridge with one input port
and one output port. It receives the data with the help of an external
MIPI PHY (C-PHY or D-PHY) and passes it to the Rockchip RK3568 Video
Capture (VICAP) block. Add a V4L2 subdevice driver for this unit.

Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
---
drivers/media/platform/rockchip/rkcif/Makefile | 3 +
.../platform/rockchip/rkcif/rkcif-mipi-csi-host.c | 731 +++++++++++++++++++++
2 files changed, 734 insertions(+)

diff --git a/drivers/media/platform/rockchip/rkcif/Makefile b/drivers/media/platform/rockchip/rkcif/Makefile
index 818424972c7b..f3a91912c373 100644
--- a/drivers/media/platform/rockchip/rkcif/Makefile
+++ b/drivers/media/platform/rockchip/rkcif/Makefile
@@ -5,3 +5,6 @@ rockchip-cif-objs += rkcif-dev.o \
rkcif-capture-mipi.o \
rkcif-interface.o \
rkcif-stream.o
+
+obj-$(CONFIG_VIDEO_ROCKCHIP_CIF) += rockchip-mipi-csi.o
+rockchip-mipi-csi-objs += rkcif-mipi-csi-host.o
diff --git a/drivers/media/platform/rockchip/rkcif/rkcif-mipi-csi-host.c b/drivers/media/platform/rockchip/rkcif/rkcif-mipi-csi-host.c
new file mode 100644
index 000000000000..58eb4b102d48
--- /dev/null
+++ b/drivers/media/platform/rockchip/rkcif/rkcif-mipi-csi-host.c
@@ -0,0 +1,731 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Rockchip MIPI CSI-2 Host Driver
+ *
+ * Copyright (C) 2019 Rockchip Electronics Co., Ltd.
+ * Copyright (C) 2025 Michael Riesch <michael.riesch@wolfvision.net>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/of_platform.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <media/mipi-csi2.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-subdev.h>
+
+#define CSI2HOST_N_LANES 0x04
+#define CSI2HOST_CSI2_RESETN 0x10
+#define CSI2HOST_PHY_STATE 0x14
+#define CSI2HOST_ERR1 0x20
+#define CSI2HOST_ERR2 0x24
+#define CSI2HOST_MSK1 0x28
+#define CSI2HOST_MSK2 0x2c
+#define CSI2HOST_CONTROL 0x40
+
+#define SW_CPHY_EN(x) ((x) << 0)
+#define SW_DSI_EN(x) ((x) << 4)
+#define SW_DATATYPE_FS(x) ((x) << 8)
+#define SW_DATATYPE_FE(x) ((x) << 14)
+#define SW_DATATYPE_LS(x) ((x) << 20)
+#define SW_DATATYPE_LE(x) ((x) << 26)
+
+#define RKCIF_CSI_CLKS_MAX 1
+
+enum {
+ RKCIF_CSI_PAD_SINK,
+ RKCIF_CSI_PAD_SRC,
+ RKCIF_CSI_PAD_MAX,
+};
+
+struct rkcif_csi_format {
+ u32 code;
+ u8 depth;
+ u8 csi_dt;
+};
+
+struct rkcif_csi_device {
+ struct device *dev;
+
+ void __iomem *base_addr;
+ struct clk_bulk_data *clks;
+ unsigned int clks_num;
+ struct phy *phy;
+ struct reset_control *reset;
+
+ const struct rkcif_csi_format *formats;
+ unsigned int formats_num;
+
+ struct media_pad pads[RKCIF_CSI_PAD_MAX];
+ struct v4l2_async_notifier notifier;
+ struct v4l2_fwnode_endpoint vep;
+ struct v4l2_subdev sd;
+
+ struct v4l2_subdev *source_sd;
+ u32 source_pad;
+};
+
+const struct v4l2_mbus_framefmt default_format = {
+ .width = 3840,
+ .height = 2160,
+ .code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .field = V4L2_FIELD_NONE,
+ .colorspace = V4L2_COLORSPACE_RAW,
+ .ycbcr_enc = V4L2_YCBCR_ENC_601,
+ .quantization = V4L2_QUANTIZATION_FULL_RANGE,
+ .xfer_func = V4L2_XFER_FUNC_NONE,
+};
+
+static const struct rkcif_csi_format formats[] = {
+ /* YUV formats */
+ {
+ .code = MEDIA_BUS_FMT_YUYV8_1X16,
+ .depth = 16,
+ .csi_dt = MIPI_CSI2_DT_YUV422_8B,
+ },
+ {
+ .code = MEDIA_BUS_FMT_UYVY8_1X16,
+ .depth = 16,
+ .csi_dt = MIPI_CSI2_DT_YUV422_8B,
+ },
+ {
+ .code = MEDIA_BUS_FMT_YVYU8_1X16,
+ .depth = 16,
+ .csi_dt = MIPI_CSI2_DT_YUV422_8B,
+ },
+ {
+ .code = MEDIA_BUS_FMT_VYUY8_1X16,
+ .depth = 16,
+ .csi_dt = MIPI_CSI2_DT_YUV422_8B,
+ },
+ /* RGB formats */
+ {
+ .code = MEDIA_BUS_FMT_RGB888_1X24,
+ .depth = 24,
+ .csi_dt = MIPI_CSI2_DT_RGB888,
+ },
+ {
+ .code = MEDIA_BUS_FMT_BGR888_1X24,
+ .depth = 24,
+ .csi_dt = MIPI_CSI2_DT_RGB888,
+ },
+ /* Bayer formats */
+ {
+ .code = MEDIA_BUS_FMT_SBGGR8_1X8,
+ .depth = 8,
+ .csi_dt = MIPI_CSI2_DT_RAW8,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGBRG8_1X8,
+ .depth = 8,
+ .csi_dt = MIPI_CSI2_DT_RAW8,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGRBG8_1X8,
+ .depth = 8,
+ .csi_dt = MIPI_CSI2_DT_RAW8,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SRGGB8_1X8,
+ .depth = 8,
+ .csi_dt = MIPI_CSI2_DT_RAW8,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SBGGR10_1X10,
+ .depth = 10,
+ .csi_dt = MIPI_CSI2_DT_RAW10,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGBRG10_1X10,
+ .depth = 10,
+ .csi_dt = MIPI_CSI2_DT_RAW10,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGRBG10_1X10,
+ .depth = 10,
+ .csi_dt = MIPI_CSI2_DT_RAW10,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SRGGB10_1X10,
+ .depth = 10,
+ .csi_dt = MIPI_CSI2_DT_RAW10,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SBGGR12_1X12,
+ .depth = 12,
+ .csi_dt = MIPI_CSI2_DT_RAW12,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGBRG12_1X12,
+ .depth = 12,
+ .csi_dt = MIPI_CSI2_DT_RAW12,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SGRBG12_1X12,
+ .depth = 12,
+ .csi_dt = MIPI_CSI2_DT_RAW12,
+ },
+ {
+ .code = MEDIA_BUS_FMT_SRGGB12_1X12,
+ .depth = 12,
+ .csi_dt = MIPI_CSI2_DT_RAW12,
+ },
+};
+
+static inline struct rkcif_csi_device *to_rkcif_csi(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct rkcif_csi_device, sd);
+}
+
+static inline __maybe_unused void
+rkcif_csi_write(struct rkcif_csi_device *csi_dev, unsigned int addr, u32 val)
+{
+ writel(val, csi_dev->base_addr + addr);
+}
+
+static inline __maybe_unused u32
+rkcif_csi_read(struct rkcif_csi_device *csi_dev, unsigned int addr)
+{
+ return readl(csi_dev->base_addr + addr);
+}
+
+static const struct rkcif_csi_format *
+rkcif_csi_find_format(struct rkcif_csi_device *csi_dev, u32 mbus_code)
+{
+ const struct rkcif_csi_format *format;
+
+ WARN_ON(csi_dev->formats_num == 0);
+
+ for (int i = 0; i < csi_dev->formats_num; i++) {
+ format = &csi_dev->formats[i];
+ if (format->code == mbus_code)
+ return format;
+ }
+
+ return NULL;
+}
+
+static int rkcif_csi_start(struct rkcif_csi_device *csi_dev)
+{
+ enum v4l2_mbus_type bus_type = csi_dev->vep.bus_type;
+ union phy_configure_opts opts;
+ s64 link_freq;
+ u32 lanes = csi_dev->vep.bus.mipi_csi2.num_data_lanes;
+ u32 control = 0;
+
+ if (lanes < 1 || lanes > 4)
+ return -EINVAL;
+
+ /* set mult and div to 0, thus completely rely on V4L2_CID_LINK_FREQ */
+ link_freq = v4l2_get_link_freq(csi_dev->source_sd->ctrl_handler, 0, 0);
+ if (link_freq <= 0)
+ return -EINVAL;
+
+ if (bus_type == V4L2_MBUS_CSI2_DPHY) {
+ struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy;
+
+ phy_mipi_dphy_get_default_config_for_hsclk(link_freq * 2, lanes,
+ cfg);
+ phy_set_mode(csi_dev->phy, PHY_MODE_MIPI_DPHY);
+ phy_configure(csi_dev->phy, &opts);
+
+ control |= SW_CPHY_EN(0);
+
+ } else if (bus_type == V4L2_MBUS_CSI2_CPHY) {
+ control |= SW_CPHY_EN(1);
+
+ /* TODO: implement CPHY configuration */
+ } else {
+ return -EINVAL;
+ }
+
+ control |= SW_DATATYPE_FS(0x00) | SW_DATATYPE_FE(0x01) |
+ SW_DATATYPE_LS(0x02) | SW_DATATYPE_LE(0x03);
+
+ rkcif_csi_write(csi_dev, CSI2HOST_N_LANES, lanes - 1);
+ rkcif_csi_write(csi_dev, CSI2HOST_CONTROL, control);
+ rkcif_csi_write(csi_dev, CSI2HOST_CSI2_RESETN, 1);
+
+ phy_power_on(csi_dev->phy);
+
+ return 0;
+}
+
+static void rkcif_csi_stop(struct rkcif_csi_device *csi_dev)
+{
+ phy_power_off(csi_dev->phy);
+
+ rkcif_csi_write(csi_dev, CSI2HOST_CSI2_RESETN, 0);
+ rkcif_csi_write(csi_dev, CSI2HOST_MSK1, ~0);
+ rkcif_csi_write(csi_dev, CSI2HOST_MSK2, ~0);
+}
+
+static const struct media_entity_operations rkcif_csi_media_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static int rkcif_csi_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct rkcif_csi_device *csi_dev = to_rkcif_csi(sd);
+
+ if (code->pad == RKCIF_CSI_PAD_SRC) {
+ const struct v4l2_mbus_framefmt *sink_fmt;
+
+ if (code->index)
+ return -EINVAL;
+
+ sink_fmt = v4l2_subdev_state_get_format(sd_state,
+ RKCIF_CSI_PAD_SINK);
+ code->code = sink_fmt->code;
+
+ return 0;
+ } else if (code->pad == RKCIF_CSI_PAD_SINK) {
+ if (code->index > csi_dev->formats_num)
+ return -EINVAL;
+
+ code->code = csi_dev->formats[code->index].code;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int rkcif_csi_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *format)
+{
+ struct rkcif_csi_device *csi_dev = to_rkcif_csi(sd);
+ const struct rkcif_csi_format *fmt;
+ struct v4l2_mbus_framefmt *sink, *src;
+
+ /* the format on the source pad always matches the sink pad */
+ if (format->pad == RKCIF_CSI_PAD_SRC)
+ return v4l2_subdev_get_fmt(sd, state, format);
+
+ sink = v4l2_subdev_state_get_format(state, format->pad, format->stream);
+ if (!sink)
+ return -EINVAL;
+
+ fmt = rkcif_csi_find_format(csi_dev, format->format.code);
+ if (fmt)
+ *sink = format->format;
+ else
+ *sink = default_format;
+
+ /* propagate the format to the source pad */
+ src = v4l2_subdev_state_get_opposite_stream_format(state, format->pad,
+ format->stream);
+ if (!src)
+ return -EINVAL;
+
+ *src = *sink;
+
+ return 0;
+}
+
+static int rkcif_csi_set_routing(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ enum v4l2_subdev_format_whence which,
+ struct v4l2_subdev_krouting *routing)
+{
+ int ret;
+
+ ret = v4l2_subdev_routing_validate(sd, routing,
+ V4L2_SUBDEV_ROUTING_ONLY_1_TO_1);
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_set_routing_with_fmt(sd, state, routing,
+ &default_format);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int rkcif_csi_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct rkcif_csi_device *csi_dev = to_rkcif_csi(sd);
+ struct v4l2_subdev *remote_sd;
+ struct media_pad *sink_pad, *remote_pad;
+ struct device *dev = csi_dev->dev;
+ u64 mask;
+ int ret;
+
+ sink_pad = &sd->entity.pads[RKCIF_CSI_PAD_SINK];
+ remote_pad = media_pad_remote_pad_first(sink_pad);
+ remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
+
+ mask = v4l2_subdev_state_xlate_streams(state, RKCIF_CSI_PAD_SINK,
+ RKCIF_CSI_PAD_SRC,
+ &streams_mask);
+
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret)
+ goto err;
+
+ ret = rkcif_csi_start(csi_dev);
+ if (ret) {
+ dev_err(dev, "failed to enable CSI hardware\n");
+ goto err_pm_runtime_put;
+ }
+
+ ret = v4l2_subdev_enable_streams(remote_sd, remote_pad->index, mask);
+ if (ret)
+ goto err_csi_stop;
+
+ return 0;
+
+err_csi_stop:
+ rkcif_csi_stop(csi_dev);
+err_pm_runtime_put:
+ pm_runtime_put_sync(dev);
+err:
+ return ret;
+}
+
+static int rkcif_csi_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct rkcif_csi_device *csi_dev = to_rkcif_csi(sd);
+ struct v4l2_subdev *remote_sd;
+ struct media_pad *sink_pad, *remote_pad;
+ struct device *dev = csi_dev->dev;
+ u64 mask;
+ int ret;
+
+ sink_pad = &sd->entity.pads[RKCIF_CSI_PAD_SINK];
+ remote_pad = media_pad_remote_pad_first(sink_pad);
+ remote_sd = media_entity_to_v4l2_subdev(remote_pad->entity);
+
+ mask = v4l2_subdev_state_xlate_streams(state, RKCIF_CSI_PAD_SINK,
+ RKCIF_CSI_PAD_SRC,
+ &streams_mask);
+
+ ret = v4l2_subdev_disable_streams(remote_sd, remote_pad->index, mask);
+
+ rkcif_csi_stop(csi_dev);
+
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_pad_ops rkcif_csi_pad_ops = {
+ .enum_mbus_code = rkcif_csi_enum_mbus_code,
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = rkcif_csi_set_fmt,
+ .set_routing = rkcif_csi_set_routing,
+ .enable_streams = rkcif_csi_enable_streams,
+ .disable_streams = rkcif_csi_disable_streams,
+};
+
+static const struct v4l2_subdev_ops rkcif_csi_ops = {
+ .pad = &rkcif_csi_pad_ops,
+};
+
+static int rkcif_csi_init_state(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state)
+{
+ struct v4l2_subdev_route routes[] = {
+ {
+ .sink_pad = RKCIF_CSI_PAD_SINK,
+ .sink_stream = 0,
+ .source_pad = RKCIF_CSI_PAD_SRC,
+ .source_stream = 0,
+ .flags = V4L2_SUBDEV_ROUTE_FL_ACTIVE,
+ },
+ };
+ struct v4l2_subdev_krouting routing = {
+ .len_routes = ARRAY_SIZE(routes),
+ .num_routes = ARRAY_SIZE(routes),
+ .routes = routes,
+ };
+ int ret;
+
+ ret = v4l2_subdev_set_routing_with_fmt(sd, state, &routing,
+ &default_format);
+
+ return ret;
+}
+
+static const struct v4l2_subdev_internal_ops rkcif_csi_internal_ops = {
+ .init_state = rkcif_csi_init_state,
+};
+
+static int rkcif_csi_notifier_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *sd,
+ struct v4l2_async_connection *asd)
+{
+ struct rkcif_csi_device *csi_dev =
+ container_of(notifier, struct rkcif_csi_device, notifier);
+ int source_pad;
+
+ source_pad = media_entity_get_fwnode_pad(&sd->entity, sd->fwnode,
+ MEDIA_PAD_FL_SOURCE);
+ if (source_pad < 0) {
+ dev_err(csi_dev->dev, "failed to find source pad for %s\n",
+ sd->name);
+ return source_pad;
+ }
+
+ csi_dev->source_sd = sd;
+ csi_dev->source_pad = source_pad;
+
+ return media_create_pad_link(&sd->entity, source_pad,
+ &csi_dev->sd.entity, RKCIF_CSI_PAD_SINK,
+ MEDIA_LNK_FL_ENABLED);
+}
+
+static const struct v4l2_async_notifier_operations rkcif_csi_notifier_ops = {
+ .bound = rkcif_csi_notifier_bound,
+};
+
+static int rkcif_register_notifier(struct rkcif_csi_device *csi_dev)
+{
+ struct v4l2_async_connection *asd;
+ struct v4l2_async_notifier *ntf = &csi_dev->notifier;
+ struct v4l2_fwnode_endpoint *vep = &csi_dev->vep;
+ struct v4l2_subdev *sd = &csi_dev->sd;
+ struct device *dev = csi_dev->dev;
+ struct fwnode_handle *ep;
+ int ret;
+
+ ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), 0, 0, 0);
+ if (!ep)
+ return dev_err_probe(dev, -ENODEV, "failed to get endpoint\n");
+
+ vep->bus_type = V4L2_MBUS_UNKNOWN;
+ ret = v4l2_fwnode_endpoint_parse(ep, vep);
+ if (ret) {
+ ret = dev_err_probe(dev, ret, "failed to parse endpoint\n");
+ goto out;
+ }
+
+ if (vep->bus_type != V4L2_MBUS_CSI2_DPHY &&
+ vep->bus_type != V4L2_MBUS_CSI2_CPHY) {
+ ret = dev_err_probe(dev, -EINVAL,
+ "invalid bus type of endpoint\n");
+ goto out;
+ }
+
+ v4l2_async_subdev_nf_init(ntf, sd);
+ ntf->ops = &rkcif_csi_notifier_ops;
+
+ asd = v4l2_async_nf_add_fwnode_remote(ntf, ep,
+ struct v4l2_async_connection);
+ if (IS_ERR(asd)) {
+ ret = PTR_ERR(asd);
+ goto out;
+ }
+
+ ret = v4l2_async_nf_register(ntf);
+ if (ret) {
+ ret = dev_err_probe(dev, ret, "failed to register notifier\n");
+ v4l2_async_nf_cleanup(ntf);
+ goto out;
+ }
+
+ ret = 0;
+
+out:
+ fwnode_handle_put(ep);
+ return ret;
+}
+
+static int rkcif_csi_register(struct rkcif_csi_device *csi_dev)
+{
+ struct media_pad *pads = csi_dev->pads;
+ struct v4l2_subdev *sd = &csi_dev->sd;
+ int ret;
+
+ ret = rkcif_register_notifier(csi_dev);
+ if (ret)
+ goto err;
+
+ v4l2_subdev_init(sd, &rkcif_csi_ops);
+ sd->dev = csi_dev->dev;
+ sd->entity.ops = &rkcif_csi_media_ops;
+ sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_STREAMS;
+ sd->internal_ops = &rkcif_csi_internal_ops;
+ sd->owner = THIS_MODULE;
+ snprintf(sd->name, sizeof(sd->name), "rockchip-mipi-csi %s",
+ dev_name(csi_dev->dev));
+
+ pads[RKCIF_CSI_PAD_SINK].flags = MEDIA_PAD_FL_SINK |
+ MEDIA_PAD_FL_MUST_CONNECT;
+ pads[RKCIF_CSI_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE |
+ MEDIA_PAD_FL_MUST_CONNECT;
+ ret = media_entity_pads_init(&sd->entity, RKCIF_CSI_PAD_MAX, pads);
+ if (ret)
+ goto err_notifier_unregister;
+
+ ret = v4l2_subdev_init_finalize(sd);
+ if (ret)
+ goto err_entity_cleanup;
+
+ ret = v4l2_async_register_subdev(sd);
+ if (ret) {
+ dev_err(sd->dev, "failed to register CSI subdev\n");
+ goto err_subdev_cleanup;
+ }
+
+ return 0;
+
+err_subdev_cleanup:
+ v4l2_subdev_cleanup(sd);
+err_entity_cleanup:
+ media_entity_cleanup(&sd->entity);
+err_notifier_unregister:
+ v4l2_async_nf_unregister(&csi_dev->notifier);
+ v4l2_async_nf_cleanup(&csi_dev->notifier);
+err:
+ return ret;
+}
+
+static void rkcif_csi_unregister(struct rkcif_csi_device *csi_dev)
+{
+ struct v4l2_subdev *sd = &csi_dev->sd;
+
+ v4l2_async_unregister_subdev(sd);
+ v4l2_subdev_cleanup(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_async_nf_unregister(&csi_dev->notifier);
+ v4l2_async_nf_cleanup(&csi_dev->notifier);
+}
+
+static const struct of_device_id rkcif_csi_of_match[] = {
+ {
+ .compatible = "rockchip,rk3568-mipi-csi",
+ },
+ {}
+};
+MODULE_DEVICE_TABLE(of, rkcif_csi_of_match);
+
+static int rkcif_csi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct rkcif_csi_device *csi_dev;
+ int ret;
+
+ csi_dev = devm_kzalloc(dev, sizeof(*csi_dev), GFP_KERNEL);
+ if (!csi_dev)
+ return -ENOMEM;
+ csi_dev->dev = dev;
+ dev_set_drvdata(dev, csi_dev);
+
+ csi_dev->base_addr = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(csi_dev->base_addr))
+ return PTR_ERR(csi_dev->base_addr);
+
+ ret = devm_clk_bulk_get_all(dev, &csi_dev->clks);
+ if (ret != RKCIF_CSI_CLKS_MAX)
+ return dev_err_probe(dev, ret, "failed to get clocks\n");
+ csi_dev->clks_num = ret;
+
+ csi_dev->phy = devm_phy_get(dev, NULL);
+ if (IS_ERR(csi_dev->phy))
+ return dev_err_probe(dev, PTR_ERR(csi_dev->phy),
+ "failed to get MIPI CSI PHY\n");
+
+ csi_dev->reset = devm_reset_control_array_get_exclusive(dev);
+ if (IS_ERR(csi_dev->reset))
+ return dev_err_probe(dev, PTR_ERR(csi_dev->reset),
+ "failed to get reset\n");
+
+ csi_dev->formats = formats;
+ csi_dev->formats_num = ARRAY_SIZE(formats);
+
+ pm_runtime_enable(dev);
+
+ ret = phy_init(csi_dev->phy);
+ if (ret) {
+ ret = dev_err_probe(dev, ret,
+ "failed to initialize MIPI CSI PHY\n");
+ goto err_pm_runtime_disable;
+ }
+
+ ret = rkcif_csi_register(csi_dev);
+ if (ret)
+ goto err_phy_exit;
+
+ return 0;
+
+err_phy_exit:
+ phy_exit(csi_dev->phy);
+err_pm_runtime_disable:
+ pm_runtime_disable(dev);
+ return ret;
+}
+
+static void rkcif_csi_remove(struct platform_device *pdev)
+{
+ struct rkcif_csi_device *csi_dev = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+
+ rkcif_csi_unregister(csi_dev);
+ phy_exit(csi_dev->phy);
+ pm_runtime_disable(dev);
+}
+
+static int rkcif_csi_runtime_suspend(struct device *dev)
+{
+ struct rkcif_csi_device *csi_dev = dev_get_drvdata(dev);
+
+ clk_bulk_disable_unprepare(csi_dev->clks_num, csi_dev->clks);
+
+ return 0;
+}
+
+static int rkcif_csi_runtime_resume(struct device *dev)
+{
+ struct rkcif_csi_device *csi_dev = dev_get_drvdata(dev);
+ int ret;
+
+ reset_control_assert(csi_dev->reset);
+ udelay(5);
+ reset_control_deassert(csi_dev->reset);
+
+ ret = clk_bulk_prepare_enable(csi_dev->clks_num, csi_dev->clks);
+ if (ret) {
+ dev_err(dev, "failed to enable clocks\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct dev_pm_ops rkcif_csi_pm_ops = {
+ .runtime_suspend = rkcif_csi_runtime_suspend,
+ .runtime_resume = rkcif_csi_runtime_resume,
+};
+
+static struct platform_driver rkcif_csi_drv = {
+ .driver = {
+ .name = "rockchip-mipi-csi",
+ .of_match_table = rkcif_csi_of_match,
+ .pm = &rkcif_csi_pm_ops,
+ },
+ .probe = rkcif_csi_probe,
+ .remove = rkcif_csi_remove,
+};
+module_platform_driver(rkcif_csi_drv);
+
+MODULE_DESCRIPTION("Rockchip MIPI CSI-2 Host platform driver");
+MODULE_LICENSE("GPL");

--
2.34.1