1 files changed, 302 insertions, 4 deletions

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c
index 81849c8e9c73..0c90f76ba9b3 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c
@@ -11,19 +11,46 @@
 
 #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;
 
@@ -43,7 +70,7 @@ static int rkisp1_csi_config(struct rkisp1_csi *csi,
 
 	/* 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 */
@@ -114,8 +141,7 @@ int rkisp1_csi_start(struct rkisp1_csi *csi,
 		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);
@@ -186,6 +212,278 @@ irqreturn_t rkisp1_csi_isr(int irq, void *ctx)
 	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;