#include <linux/delay.h>
#include <linux/device.h>
+#include <linux/lockdep.h>
#include <linux/phy/phy.h>
#include <linux/phy/phy-mipi-dphy.h>
#include <media/v4l2-ctrls.h>
+#include <media/v4l2-fwnode.h>
#include "rkisp1-common.h"
#include "rkisp1-csi.h"
+#define RKISP1_CSI_DEV_NAME RKISP1_DRIVER_NAME "_csi"
+
+#define RKISP1_CSI_DEF_FMT MEDIA_BUS_FMT_SRGGB10_1X10
+
+static inline struct rkisp1_csi *to_rkisp1_csi(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct rkisp1_csi, sd);
+}
+
+static struct v4l2_mbus_framefmt *
+rkisp1_csi_get_pad_fmt(struct rkisp1_csi *csi,
+ struct v4l2_subdev_state *sd_state,
+ unsigned int pad, u32 which)
+{
+ struct v4l2_subdev_state state = {
+ .pads = csi->pad_cfg
+ };
+
+ lockdep_assert_held(&csi->lock);
+
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_format(&csi->sd, sd_state, pad);
+ else
+ return v4l2_subdev_get_try_format(&csi->sd, &state, pad);
+}
+
static int rkisp1_csi_config(struct rkisp1_csi *csi,
const struct rkisp1_sensor_async *sensor)
{
struct rkisp1_device *rkisp1 = csi->rkisp1;
- const struct rkisp1_mbus_info *sink_fmt = rkisp1->isp.sink_fmt;
unsigned int lanes = sensor->lanes;
u32 mipi_ctrl;
/* Configure Data Type and Virtual Channel */
rkisp1_write(rkisp1, RKISP1_CIF_MIPI_IMG_DATA_SEL,
- RKISP1_CIF_MIPI_DATA_SEL_DT(sink_fmt->mipi_dt) |
+ RKISP1_CIF_MIPI_DATA_SEL_DT(csi->sink_fmt->mipi_dt) |
RKISP1_CIF_MIPI_DATA_SEL_VC(0));
/* Clear MIPI interrupts */
return -EINVAL;
}
- phy_mipi_dphy_get_default_config(pixel_clock,
- rkisp1->isp.sink_fmt->bus_width,
+ phy_mipi_dphy_get_default_config(pixel_clock, csi->sink_fmt->bus_width,
sensor->lanes, cfg);
phy_set_mode(csi->dphy, PHY_MODE_MIPI_DPHY);
phy_configure(csi->dphy, &opts);
return IRQ_HANDLED;
}
+/* ----------------------------------------------------------------------------
+ * Subdev pad operations
+ */
+
+static int rkisp1_csi_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct rkisp1_csi *csi = to_rkisp1_csi(sd);
+ unsigned int i;
+ int pos = 0;
+
+ if (code->pad == RKISP1_CSI_PAD_SRC) {
+ const struct v4l2_mbus_framefmt *sink_fmt;
+
+ if (code->index)
+ return -EINVAL;
+
+ mutex_lock(&csi->lock);
+
+ sink_fmt = rkisp1_csi_get_pad_fmt(csi, sd_state,
+ RKISP1_CSI_PAD_SINK,
+ code->which);
+ code->code = sink_fmt->code;
+
+ mutex_unlock(&csi->lock);
+
+ return 0;
+ }
+
+ for (i = 0; ; i++) {
+ const struct rkisp1_mbus_info *fmt =
+ rkisp1_mbus_info_get_by_index(i);
+
+ if (!fmt)
+ return -EINVAL;
+
+ if (!(fmt->direction & RKISP1_ISP_SD_SINK))
+ continue;
+
+ if (code->index == pos) {
+ code->code = fmt->mbus_code;
+ return 0;
+ }
+
+ pos++;
+ }
+
+ return -EINVAL;
+}
+
+static int rkisp1_csi_init_config(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state)
+{
+ struct v4l2_mbus_framefmt *sink_fmt, *src_fmt;
+
+ sink_fmt = v4l2_subdev_get_try_format(sd, sd_state,
+ RKISP1_CSI_PAD_SINK);
+ src_fmt = v4l2_subdev_get_try_format(sd, sd_state,
+ RKISP1_CSI_PAD_SRC);
+
+ sink_fmt->width = RKISP1_DEFAULT_WIDTH;
+ sink_fmt->height = RKISP1_DEFAULT_HEIGHT;
+ sink_fmt->field = V4L2_FIELD_NONE;
+ sink_fmt->code = RKISP1_CSI_DEF_FMT;
+
+ *src_fmt = *sink_fmt;
+
+ return 0;
+}
+
+static int rkisp1_csi_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct rkisp1_csi *csi = to_rkisp1_csi(sd);
+
+ mutex_lock(&csi->lock);
+ fmt->format = *rkisp1_csi_get_pad_fmt(csi, sd_state, fmt->pad,
+ fmt->which);
+ mutex_unlock(&csi->lock);
+
+ return 0;
+}
+
+static int rkisp1_csi_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct rkisp1_csi *csi = to_rkisp1_csi(sd);
+ const struct rkisp1_mbus_info *mbus_info;
+ struct v4l2_mbus_framefmt *sink_fmt, *src_fmt;
+
+ /* The format on the source pad always matches the sink pad. */
+ if (fmt->pad == RKISP1_CSI_PAD_SRC)
+ return rkisp1_csi_get_fmt(sd, sd_state, fmt);
+
+ mutex_lock(&csi->lock);
+
+ sink_fmt = rkisp1_csi_get_pad_fmt(csi, sd_state, RKISP1_CSI_PAD_SINK,
+ fmt->which);
+
+ sink_fmt->code = fmt->format.code;
+
+ mbus_info = rkisp1_mbus_info_get_by_code(sink_fmt->code);
+ if (!mbus_info || !(mbus_info->direction & RKISP1_ISP_SD_SINK)) {
+ sink_fmt->code = RKISP1_CSI_DEF_FMT;
+ mbus_info = rkisp1_mbus_info_get_by_code(sink_fmt->code);
+ }
+
+ sink_fmt->width = clamp_t(u32, fmt->format.width,
+ RKISP1_ISP_MIN_WIDTH,
+ RKISP1_ISP_MAX_WIDTH);
+ sink_fmt->height = clamp_t(u32, fmt->format.height,
+ RKISP1_ISP_MIN_HEIGHT,
+ RKISP1_ISP_MAX_HEIGHT);
+
+ fmt->format = *sink_fmt;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+ csi->sink_fmt = mbus_info;
+
+ /* Propagate the format to the source pad. */
+ src_fmt = rkisp1_csi_get_pad_fmt(csi, sd_state, RKISP1_CSI_PAD_SRC,
+ fmt->which);
+ *src_fmt = *sink_fmt;
+
+ mutex_unlock(&csi->lock);
+
+ return 0;
+}
+
+/* ----------------------------------------------------------------------------
+ * Subdev video operations
+ */
+
+static int rkisp1_csi_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct rkisp1_csi *csi = to_rkisp1_csi(sd);
+ struct rkisp1_device *rkisp1 = csi->rkisp1;
+ struct rkisp1_sensor_async *source_asd;
+ struct media_pad *source_pad;
+ struct v4l2_subdev *source;
+ int ret;
+
+ if (!enable) {
+ v4l2_subdev_call(csi->source, video, s_stream, false);
+
+ rkisp1_csi_stop(csi);
+
+ return 0;
+ }
+
+ source_pad = media_entity_remote_source_pad_unique(&sd->entity);
+ if (IS_ERR(source_pad)) {
+ dev_dbg(rkisp1->dev, "Failed to get source for CSI: %ld\n",
+ PTR_ERR(source_pad));
+ return -EPIPE;
+ }
+
+ source = media_entity_to_v4l2_subdev(source_pad->entity);
+ if (!source) {
+ /* This should really not happen, so is not worth a message. */
+ return -EPIPE;
+ }
+
+ source_asd = container_of(source->asd, struct rkisp1_sensor_async, asd);
+ if (source_asd->mbus_type != V4L2_MBUS_CSI2_DPHY)
+ return -EINVAL;
+
+ mutex_lock(&csi->lock);
+ ret = rkisp1_csi_start(csi, source_asd);
+ mutex_unlock(&csi->lock);
+ if (ret)
+ return ret;
+
+ ret = v4l2_subdev_call(source, video, s_stream, true);
+ if (ret) {
+ rkisp1_csi_stop(csi);
+ return ret;
+ }
+
+ csi->source = source;
+
+ return 0;
+}
+
+/* ----------------------------------------------------------------------------
+ * Registration
+ */
+
+static const struct media_entity_operations rkisp1_csi_media_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+static const struct v4l2_subdev_video_ops rkisp1_csi_video_ops = {
+ .s_stream = rkisp1_csi_s_stream,
+};
+
+static const struct v4l2_subdev_pad_ops rkisp1_csi_pad_ops = {
+ .enum_mbus_code = rkisp1_csi_enum_mbus_code,
+ .init_cfg = rkisp1_csi_init_config,
+ .get_fmt = rkisp1_csi_get_fmt,
+ .set_fmt = rkisp1_csi_set_fmt,
+};
+
+static const struct v4l2_subdev_ops rkisp1_csi_ops = {
+ .video = &rkisp1_csi_video_ops,
+ .pad = &rkisp1_csi_pad_ops,
+};
+
+int rkisp1_csi_register(struct rkisp1_device *rkisp1)
+{
+ struct rkisp1_csi *csi = &rkisp1->csi;
+ struct v4l2_subdev_state state = {};
+ struct media_pad *pads;
+ struct v4l2_subdev *sd;
+ int ret;
+
+ csi->rkisp1 = rkisp1;
+ mutex_init(&csi->lock);
+
+ sd = &csi->sd;
+ v4l2_subdev_init(sd, &rkisp1_csi_ops);
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ sd->entity.ops = &rkisp1_csi_media_ops;
+ sd->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
+ sd->owner = THIS_MODULE;
+ strscpy(sd->name, RKISP1_CSI_DEV_NAME, sizeof(sd->name));
+
+ pads = csi->pads;
+ pads[RKISP1_CSI_PAD_SINK].flags = MEDIA_PAD_FL_SINK |
+ MEDIA_PAD_FL_MUST_CONNECT;
+ pads[RKISP1_CSI_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE |
+ MEDIA_PAD_FL_MUST_CONNECT;
+
+ csi->sink_fmt = rkisp1_mbus_info_get_by_code(RKISP1_CSI_DEF_FMT);
+
+ ret = media_entity_pads_init(&sd->entity, RKISP1_CSI_PAD_NUM, pads);
+ if (ret)
+ goto error;
+
+ state.pads = csi->pad_cfg;
+ rkisp1_csi_init_config(sd, &state);
+
+ ret = v4l2_device_register_subdev(&csi->rkisp1->v4l2_dev, sd);
+ if (ret) {
+ dev_err(sd->dev, "Failed to register csi receiver subdev\n");
+ goto error;
+ }
+
+ return 0;
+
+error:
+ media_entity_cleanup(&sd->entity);
+ mutex_destroy(&csi->lock);
+ csi->rkisp1 = NULL;
+ return ret;
+}
+
+void rkisp1_csi_unregister(struct rkisp1_device *rkisp1)
+{
+ struct rkisp1_csi *csi = &rkisp1->csi;
+
+ if (!csi->rkisp1)
+ return;
+
+ v4l2_device_unregister_subdev(&csi->sd);
+ media_entity_cleanup(&csi->sd.entity);
+ mutex_destroy(&csi->lock);
+}
+
int rkisp1_csi_init(struct rkisp1_device *rkisp1)
{
struct rkisp1_csi *csi = &rkisp1->csi;
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