[PATCH v7 6/6] media: starfive: camss: Add VIN driver

From: Jack Zhu
Date: Mon Jun 19 2023 - 07:29:35 EST

Add Video In Controller driver for StarFive Camera Subsystem.

Signed-off-by: Jack Zhu <jack.zhu@xxxxxxxxxxxxxxxx>
---
.../media/platform/starfive/camss/Makefile | 4 +-
.../media/platform/starfive/camss/stf_camss.c | 42 +-
.../media/platform/starfive/camss/stf_camss.h | 2 +
.../media/platform/starfive/camss/stf_vin.c | 1069 +++++++++++++++++
.../media/platform/starfive/camss/stf_vin.h | 173 +++
.../platform/starfive/camss/stf_vin_hw_ops.c | 192 +++
6 files changed, 1478 insertions(+), 4 deletions(-)
create mode 100644 drivers/media/platform/starfive/camss/stf_vin.c
create mode 100644 drivers/media/platform/starfive/camss/stf_vin.h
create mode 100644 drivers/media/platform/starfive/camss/stf_vin_hw_ops.c

diff --git a/drivers/media/platform/starfive/camss/Makefile b/drivers/media/platform/starfive/camss/Makefile
index cdf57e8c9546..ef574e01ca47 100644
--- a/drivers/media/platform/starfive/camss/Makefile
+++ b/drivers/media/platform/starfive/camss/Makefile
@@ -7,6 +7,8 @@ starfive-camss-objs += \
stf_camss.o \
stf_isp.o \
stf_isp_hw_ops.o \
- stf_video.o
+ stf_video.o \
+ stf_vin.o \
+ stf_vin_hw_ops.o

obj-$(CONFIG_VIDEO_STARFIVE_CAMSS) += starfive-camss.o
diff --git a/drivers/media/platform/starfive/camss/stf_camss.c b/drivers/media/platform/starfive/camss/stf_camss.c
index 6f56b45f57db..834ea63eb833 100644
--- a/drivers/media/platform/starfive/camss/stf_camss.c
+++ b/drivers/media/platform/starfive/camss/stf_camss.c
@@ -131,27 +131,61 @@ static int stfcamss_init_subdevices(struct stfcamss *stfcamss)
return ret;
}

+ ret = stf_vin_subdev_init(stfcamss);
+ if (ret < 0) {
+ dev_err(stfcamss->dev, "Failed to init vin subdev: %d\n", ret);
+ return ret;
+ }
return ret;
}

static int stfcamss_register_subdevices(struct stfcamss *stfcamss)
{
int ret;
+ struct stf_vin_dev *vin_dev = &stfcamss->vin_dev;
struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;

ret = stf_isp_register(isp_dev, &stfcamss->v4l2_dev);
if (ret < 0) {
dev_err(stfcamss->dev,
"Failed to register stf isp%d entity: %d\n", 0, ret);
- return ret;
+ goto err_reg_isp;
+ }
+
+ ret = stf_vin_register(vin_dev, &stfcamss->v4l2_dev);
+ if (ret < 0) {
+ dev_err(stfcamss->dev,
+ "Failed to register vin entity: %d\n", ret);
+ goto err_reg_vin;
}

+ ret = media_create_pad_link(&isp_dev->subdev.entity,
+ STF_ISP_PAD_SRC,
+ &vin_dev->line[VIN_LINE_ISP].subdev.entity,
+ STF_VIN_PAD_SINK,
+ 0);
+ if (ret < 0) {
+ dev_err(stfcamss->dev,
+ "Failed to link %s->%s entities: %d\n",
+ isp_dev->subdev.entity.name,
+ vin_dev->line[VIN_LINE_ISP].subdev.entity.name, ret);
+ goto err_link;
+ }
+
+ return ret;
+
+err_link:
+ stf_vin_unregister(&stfcamss->vin_dev);
+err_reg_vin:
+ stf_isp_unregister(&stfcamss->isp_dev);
+err_reg_isp:
return ret;
}

static void stfcamss_unregister_subdevices(struct stfcamss *stfcamss)
{
stf_isp_unregister(&stfcamss->isp_dev);
+ stf_vin_unregister(&stfcamss->vin_dev);
}

static int stfcamss_subdev_notifier_bound(struct v4l2_async_notifier *async,
@@ -164,12 +198,14 @@ static int stfcamss_subdev_notifier_bound(struct v4l2_async_notifier *async,
container_of(asd, struct stfcamss_async_subdev, asd);
enum stf_port_num port = csd->port;
struct stf_isp_dev *isp_dev = &stfcamss->isp_dev;
+ struct stf_vin_dev *vin_dev = &stfcamss->vin_dev;
struct media_pad *pad[STF_PADS_NUM];
unsigned int i, pad_num;

if (port == STF_PORT_CSI2RX) {
- pad[0] = &isp_dev->pads[STF_PAD_SINK];
- pad_num = 1;
+ pad[0] = &vin_dev->line[VIN_LINE_WR].pads[STF_PAD_SINK];
+ pad[1] = &isp_dev->pads[STF_PAD_SINK];
+ pad_num = 2;
} else if (port == STF_PORT_DVP) {
dev_err(stfcamss->dev, "Not support DVP sensor\n");
return -EPERM;
diff --git a/drivers/media/platform/starfive/camss/stf_camss.h b/drivers/media/platform/starfive/camss/stf_camss.h
index 9482081288fa..a14f22bc0742 100644
--- a/drivers/media/platform/starfive/camss/stf_camss.h
+++ b/drivers/media/platform/starfive/camss/stf_camss.h
@@ -19,6 +19,7 @@
#include <media/v4l2-device.h>

#include "stf_isp.h"
+#include "stf_vin.h"

#define STF_DVP_NAME "stf_dvp"
#define STF_CSI_NAME "cdns_csi2rx"
@@ -67,6 +68,7 @@ struct stfcamss {
struct media_device media_dev;
struct media_pipeline pipe;
struct device *dev;
+ struct stf_vin_dev vin_dev;
struct stf_isp_dev isp_dev;
struct v4l2_async_notifier notifier;
void __iomem *syscon_base;
diff --git a/drivers/media/platform/starfive/camss/stf_vin.c b/drivers/media/platform/starfive/camss/stf_vin.c
new file mode 100644
index 000000000000..0efa4bbb079c
--- /dev/null
+++ b/drivers/media/platform/starfive/camss/stf_vin.c
@@ -0,0 +1,1069 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * stf_vin.c
+ *
+ * StarFive Camera Subsystem - VIN Module
+ *
+ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/pm_runtime.h>
+
+#include "stf_camss.h"
+
+#define vin_line_array(ptr_line) \
+ ((const struct vin_line (*)[]) &(ptr_line)[-((ptr_line)->id)])
+
+#define line_to_vin_dev(ptr_line) \
+ container_of(vin_line_array(ptr_line), struct stf_vin_dev, line)
+
+#define VIN_FRAME_DROP_MIN_VAL 4
+
+/* ISP ctrl need 1 sec to let frames become stable. */
+#define VIN_FRAME_DROP_SEC_FOR_ISP_CTRL 1
+
+static const struct vin_format vin_formats_wr[] = {
+ { MEDIA_BUS_FMT_SRGGB10_1X10, 10},
+ { MEDIA_BUS_FMT_SGRBG10_1X10, 10},
+ { MEDIA_BUS_FMT_SGBRG10_1X10, 10},
+ { MEDIA_BUS_FMT_SBGGR10_1X10, 10},
+};
+
+static const struct vin_format vin_formats_uo[] = {
+ { MEDIA_BUS_FMT_Y12_1X12, 8},
+};
+
+static const struct vin_format_table vin_formats_table[] = {
+ /* VIN_LINE_WR */
+ { vin_formats_wr, ARRAY_SIZE(vin_formats_wr) },
+ /* VIN_LINE_ISP */
+ { vin_formats_uo, ARRAY_SIZE(vin_formats_uo) },
+};
+
+static void vin_buffer_done(struct vin_line *line);
+static void vin_change_buffer(struct vin_line *line);
+static struct stfcamss_buffer *vin_buf_get_pending(struct vin_output *output);
+static void vin_output_init_addrs(struct vin_line *line);
+static struct v4l2_mbus_framefmt *
+__vin_get_format(struct vin_line *line,
+ struct v4l2_subdev_state *state,
+ unsigned int pad,
+ enum v4l2_subdev_format_whence which);
+
+static char *vin_get_line_subdevname(int line_id)
+{
+ char *name = NULL;
+
+ switch (line_id) {
+ case VIN_LINE_WR:
+ name = "wr";
+ break;
+ case VIN_LINE_ISP:
+ name = "isp0";
+ break;
+ default:
+ name = "unknown";
+ break;
+ }
+ return name;
+}
+
+static enum isp_line_id vin_map_isp_line(enum vin_line_id line)
+{
+ enum isp_line_id line_id;
+
+ if (line > VIN_LINE_WR && line < VIN_LINE_MAX)
+ line_id = STF_ISP_LINE_SRC;
+ else
+ line_id = STF_ISP_LINE_INVALID;
+
+ return line_id;
+}
+
+enum isp_pad_id stf_vin_map_isp_pad(enum vin_line_id line, enum isp_pad_id def)
+{
+ enum isp_pad_id pad_id;
+
+ if (line == VIN_LINE_WR)
+ pad_id = STF_ISP_PAD_SINK;
+ else if ((line > VIN_LINE_WR) && (line < VIN_LINE_MAX))
+ pad_id = (enum isp_pad_id)vin_map_isp_line(line);
+ else
+ pad_id = def;
+
+ return pad_id;
+}
+
+int stf_vin_subdev_init(struct stfcamss *stfcamss)
+{
+ struct device *dev = stfcamss->dev;
+ struct stf_vin_dev *vin_dev = &stfcamss->vin_dev;
+ int i, ret = 0;
+
+ vin_dev->stfcamss = stfcamss;
+
+ vin_dev->isr_ops = devm_kzalloc(dev, sizeof(*vin_dev->isr_ops),
+ GFP_KERNEL);
+ if (!vin_dev->isr_ops)
+ return -ENOMEM;
+ vin_dev->isr_ops->isr_buffer_done = vin_buffer_done;
+ vin_dev->isr_ops->isr_change_buffer = vin_change_buffer;
+
+ atomic_set(&vin_dev->ref_count, 0);
+
+ ret = devm_request_irq(dev,
+ stfcamss->irq[STF_IRQ_VINWR],
+ stf_vin_wr_irq_handler,
+ 0, "vin_axiwr_irq", vin_dev);
+ if (ret) {
+ dev_err(dev, "Failed to request irq\n");
+ goto out;
+ }
+
+ ret = devm_request_irq(dev,
+ stfcamss->irq[STF_IRQ_ISP],
+ stf_vin_isp_irq_handler,
+ 0, "vin_isp_irq", vin_dev);
+ if (ret) {
+ dev_err(dev, "Failed to request isp irq\n");
+ goto out;
+ }
+
+ ret = devm_request_irq(dev,
+ stfcamss->irq[STF_IRQ_ISPCSIL],
+ stf_vin_isp_irq_csiline_handler,
+ 0, "vin_isp_irq_csiline", vin_dev);
+ if (ret) {
+ dev_err(dev, "failed to request isp irq csiline\n");
+ goto out;
+ }
+
+ for (i = 0; i < STF_DUMMY_MODULE_NUMS; i++) {
+ struct dummy_buffer *dummy_buffer = &vin_dev->dummy_buffer[i];
+
+ mutex_init(&dummy_buffer->stream_lock);
+ dummy_buffer->nums =
+ i == 0 ? VIN_DUMMY_BUFFER_NUMS : ISP_DUMMY_BUFFER_NUMS;
+ dummy_buffer->stream_count = 0;
+ dummy_buffer->buffer =
+ devm_kzalloc(dev,
+ dummy_buffer->nums * sizeof(struct vin_dummy_buffer),
+ GFP_KERNEL);
+ atomic_set(&dummy_buffer->frame_skip, 0);
+ }
+
+ for (i = VIN_LINE_WR; i < STF_ISP_LINE_MAX + 1; i++) {
+ struct vin_line *l = &vin_dev->line[i];
+
+ l->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ l->video_out.stfcamss = stfcamss;
+ l->id = i;
+ l->formats = vin_formats_table[i].fmts;
+ l->nformats = vin_formats_table[i].nfmts;
+ spin_lock_init(&l->output_lock);
+
+ mutex_init(&l->stream_lock);
+ l->stream_count = 0;
+ }
+
+ return 0;
+out:
+ return ret;
+}
+
+static enum link vin_get_link(struct media_entity *entity)
+{
+ struct v4l2_subdev *subdev;
+ struct media_pad *pad;
+ bool isp = false;
+
+ while (1) {
+ pad = &entity->pads[0];
+ if (!(pad->flags & MEDIA_PAD_FL_SINK))
+ return LINK_ERROR;
+
+ pad = media_pad_remote_pad_first(pad);
+ if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
+ return LINK_ERROR;
+
+ entity = pad->entity;
+ subdev = media_entity_to_v4l2_subdev(entity);
+
+ if (!strncmp(subdev->name, STF_CSI_NAME,
+ strlen(STF_CSI_NAME))) {
+ if (isp)
+ return LINK_CSI_TO_ISP;
+ else
+ return LINK_CSI_TO_WR;
+ } else if (!strncmp(subdev->name, STF_DVP_NAME,
+ strlen(STF_DVP_NAME))) {
+ if (isp)
+ return LINK_DVP_TO_ISP;
+ else
+ return LINK_DVP_TO_WR;
+ } else if (!strncmp(subdev->name, STF_ISP_NAME,
+ strlen(STF_ISP_NAME))) {
+ isp = true;
+ } else {
+ return LINK_ERROR;
+ }
+ }
+}
+
+static int vin_enable_output(struct vin_line *line)
+{
+ struct vin_output *output = &line->output;
+ unsigned long flags;
+
+ spin_lock_irqsave(&line->output_lock, flags);
+
+ output->state = VIN_OUTPUT_IDLE;
+
+ output->buf[0] = vin_buf_get_pending(output);
+
+ if (!output->buf[0] && output->buf[1]) {
+ output->buf[0] = output->buf[1];
+ output->buf[1] = NULL;
+ }
+
+ if (output->buf[0])
+ output->state = VIN_OUTPUT_SINGLE;
+
+ output->sequence = 0;
+
+ vin_output_init_addrs(line);
+ spin_unlock_irqrestore(&line->output_lock, flags);
+ return 0;
+}
+
+static int vin_disable_output(struct vin_line *line)
+{
+ struct vin_output *output = &line->output;
+ unsigned long flags;
+
+ spin_lock_irqsave(&line->output_lock, flags);
+
+ output->state = VIN_OUTPUT_OFF;
+
+ spin_unlock_irqrestore(&line->output_lock, flags);
+ return 0;
+}
+
+static u32 vin_line_to_dummy_module(struct vin_line *line)
+{
+ u32 dummy_module = 0;
+
+ switch (line->id) {
+ case VIN_LINE_WR:
+ dummy_module = STF_DUMMY_VIN;
+ break;
+ case VIN_LINE_ISP:
+ dummy_module = STF_DUMMY_ISP;
+ break;
+ default:
+ dummy_module = STF_DUMMY_VIN;
+ break;
+ }
+
+ return dummy_module;
+}
+
+static int vin_alloc_dummy_buffer(struct stf_vin_dev *vin_dev,
+ struct v4l2_mbus_framefmt *fmt,
+ int dummy_module)
+{
+ struct device *dev = vin_dev->stfcamss->dev;
+ struct dummy_buffer *dummy_buffer =
+ &vin_dev->dummy_buffer[dummy_module];
+ struct vin_dummy_buffer *buffer = NULL;
+ int ret = 0, i;
+ u32 aligns;
+
+ for (i = 0; i < dummy_buffer->nums; i++) {
+ buffer = &vin_dev->dummy_buffer[dummy_module].buffer[i];
+ buffer->width = fmt->width;
+ buffer->height = fmt->height;
+ buffer->mcode = fmt->code;
+ if (i == STF_VIN_PAD_SINK) {
+ aligns = ALIGN(fmt->width * 4,
+ STFCAMSS_FRAME_WIDTH_ALIGN_8);
+ buffer->buffer_size = PAGE_ALIGN(aligns * fmt->height);
+ } else if (i == STF_ISP_PAD_SRC) {
+ aligns = ALIGN(fmt->width,
+ STFCAMSS_FRAME_WIDTH_ALIGN_8);
+ buffer->buffer_size =
+ PAGE_ALIGN(aligns * fmt->height * 3 / 2);
+ } else {
+ continue;
+ }
+
+ buffer->vaddr = dma_alloc_coherent(dev,
+ buffer->buffer_size,
+ &buffer->paddr[0],
+ GFP_KERNEL | __GFP_NOWARN);
+
+ if (buffer->vaddr) {
+ if (i == STF_ISP_PAD_SRC)
+ buffer->paddr[1] =
+ (dma_addr_t)(buffer->paddr[0] + aligns * fmt->height);
+ else
+ dev_dbg(dev, "signal plane\n");
+ }
+ }
+
+ return ret;
+}
+
+static void vin_free_dummy_buffer(struct stf_vin_dev *vin_dev, int dummy_module)
+{
+ struct device *dev = vin_dev->stfcamss->dev;
+ struct dummy_buffer *dummy_buffer =
+ &vin_dev->dummy_buffer[dummy_module];
+ struct vin_dummy_buffer *buffer = NULL;
+ int i;
+
+ for (i = 0; i < dummy_buffer->nums; i++) {
+ buffer = &dummy_buffer->buffer[i];
+ if (buffer->vaddr)
+ dma_free_coherent(dev, buffer->buffer_size,
+ buffer->vaddr, buffer->paddr[0]);
+ memset(buffer, 0, sizeof(struct vin_dummy_buffer));
+ }
+}
+
+static void vin_set_dummy_buffer(struct vin_line *line, u32 pad)
+{
+ struct stf_vin_dev *vin_dev = line_to_vin_dev(line);
+ int dummy_module = vin_line_to_dummy_module(line);
+ struct dummy_buffer *dummy_buffer =
+ &vin_dev->dummy_buffer[dummy_module];
+ struct vin_dummy_buffer *buffer = NULL;
+
+ switch (pad) {
+ case STF_VIN_PAD_SINK:
+ if (line->id == VIN_LINE_WR) {
+ buffer = &dummy_buffer->buffer[STF_VIN_PAD_SINK];
+ stf_vin_wr_set_ping_addr(vin_dev, buffer->paddr[0]);
+ stf_vin_wr_set_pong_addr(vin_dev, buffer->paddr[0]);
+ } else {
+ buffer = &dummy_buffer->buffer[STF_ISP_PAD_SRC];
+ stf_vin_isp_set_yuv_addr(vin_dev,
+ buffer->paddr[0],
+ buffer->paddr[1]);
+ }
+ break;
+ case STF_ISP_PAD_SRC:
+ buffer = &dummy_buffer->buffer[STF_ISP_PAD_SRC];
+ stf_vin_isp_set_yuv_addr(vin_dev,
+ buffer->paddr[0],
+ buffer->paddr[1]);
+ break;
+ default:
+ break;
+ }
+}
+
+static int vin_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct vin_line *line = v4l2_get_subdevdata(sd);
+ struct stf_vin_dev *vin_dev = line_to_vin_dev(line);
+ int dummy_module = vin_line_to_dummy_module(line);
+ struct dummy_buffer *dummy_buffer =
+ &vin_dev->dummy_buffer[dummy_module];
+ struct v4l2_mbus_framefmt *fmt;
+ enum link link;
+
+ fmt = __vin_get_format(line, NULL,
+ STF_VIN_PAD_SINK, V4L2_SUBDEV_FORMAT_ACTIVE);
+ mutex_lock(&dummy_buffer->stream_lock);
+ if (enable) {
+ if (dummy_buffer->stream_count == 0) {
+ vin_alloc_dummy_buffer(vin_dev, fmt, dummy_module);
+ vin_set_dummy_buffer(line, STF_VIN_PAD_SINK);
+ atomic_set(&dummy_buffer->frame_skip,
+ VIN_FRAME_DROP_MIN_VAL);
+ }
+ dummy_buffer->stream_count++;
+ } else {
+ if (dummy_buffer->stream_count == 1) {
+ vin_free_dummy_buffer(vin_dev, dummy_module);
+ /* set buffer addr to zero */
+ vin_set_dummy_buffer(line, STF_VIN_PAD_SINK);
+ } else {
+ vin_set_dummy_buffer(line,
+ stf_vin_map_isp_pad(line->id, STF_ISP_PAD_SINK));
+ }
+
+ dummy_buffer->stream_count--;
+ }
+ mutex_unlock(&dummy_buffer->stream_lock);
+
+ mutex_lock(&line->stream_lock);
+ link = vin_get_link(&sd->entity);
+ if (link == LINK_ERROR)
+ goto exit;
+
+ if (enable) {
+ if (line->stream_count == 0) {
+ stf_vin_stream_set(vin_dev, link);
+ if (line->id == VIN_LINE_WR) {
+ stf_vin_wr_irq_enable(vin_dev, 1);
+ stf_vin_wr_stream_set(vin_dev);
+ }
+ }
+ line->stream_count++;
+ } else {
+ if (line->stream_count == 1 && line->id == VIN_LINE_WR)
+ stf_vin_wr_irq_enable(vin_dev, 0);
+ line->stream_count--;
+ }
+exit:
+ mutex_unlock(&line->stream_lock);
+
+ if (enable)
+ vin_enable_output(line);
+ else
+ vin_disable_output(line);
+
+ return 0;
+}
+
+static struct v4l2_mbus_framefmt *
+__vin_get_format(struct vin_line *line,
+ struct v4l2_subdev_state *state,
+ unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_format(&line->subdev, state, pad);
+ return &line->fmt[pad];
+}
+
+static void vin_try_format(struct vin_line *line,
+ struct v4l2_subdev_state *state,
+ unsigned int pad,
+ struct v4l2_mbus_framefmt *fmt,
+ enum v4l2_subdev_format_whence which)
+{
+ unsigned int i;
+
+ switch (pad) {
+ case STF_VIN_PAD_SINK:
+ /* Set format on sink pad */
+ for (i = 0; i < line->nformats; i++)
+ if (fmt->code == line->formats[i].code)
+ break;
+
+ /* If not found, use UYVY as default */
+ if (i >= line->nformats)
+ fmt->code = line->formats[0].code;
+
+ fmt->width = clamp_t(u32, fmt->width,
+ STFCAMSS_FRAME_MIN_WIDTH,
+ STFCAMSS_FRAME_MAX_WIDTH);
+ fmt->height = clamp_t(u32, fmt->height,
+ STFCAMSS_FRAME_MIN_HEIGHT,
+ STFCAMSS_FRAME_MAX_HEIGHT);
+
+ fmt->field = V4L2_FIELD_NONE;
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+ fmt->flags = 0;
+ break;
+
+ case STF_VIN_PAD_SRC:
+ /* Set and return a format same as sink pad */
+ *fmt = *__vin_get_format(line, state, STF_VIN_PAD_SINK, which);
+ break;
+ }
+
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+}
+
+static int vin_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct vin_line *line = v4l2_get_subdevdata(sd);
+
+ if (code->index >= line->nformats)
+ return -EINVAL;
+ if (code->pad == STF_VIN_PAD_SINK) {
+ code->code = line->formats[code->index].code;
+ } else {
+ struct v4l2_mbus_framefmt *sink_fmt;
+
+ sink_fmt = __vin_get_format(line, state, STF_VIN_PAD_SINK,
+ code->which);
+
+ code->code = sink_fmt->code;
+ if (!code->code)
+ return -EINVAL;
+ }
+ code->flags = 0;
+
+ return 0;
+}
+
+static int vin_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct vin_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt format;
+
+ if (fse->index != 0)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = 1;
+ format.height = 1;
+ vin_try_format(line, state, fse->pad, &format, fse->which);
+ fse->min_width = format.width;
+ fse->min_height = format.height;
+
+ if (format.code != fse->code)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = -1;
+ format.height = -1;
+ vin_try_format(line, state, fse->pad, &format, fse->which);
+ fse->max_width = format.width;
+ fse->max_height = format.height;
+
+ return 0;
+}
+
+static int vin_get_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct vin_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __vin_get_format(line, state, fmt->pad, fmt->which);
+ if (!format)
+ return -EINVAL;
+
+ fmt->format = *format;
+
+ return 0;
+}
+
+static int vin_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct vin_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __vin_get_format(line, state, fmt->pad, fmt->which);
+ if (!format)
+ return -EINVAL;
+
+ mutex_lock(&line->stream_lock);
+ if (line->stream_count) {
+ fmt->format = *format;
+ mutex_unlock(&line->stream_lock);
+ goto out;
+ } else {
+ vin_try_format(line, state, fmt->pad, &fmt->format, fmt->which);
+ *format = fmt->format;
+ }
+ mutex_unlock(&line->stream_lock);
+
+ if (fmt->pad == STF_VIN_PAD_SINK) {
+ /* Propagate the format from sink to source */
+ format = __vin_get_format(line, state, STF_VIN_PAD_SRC,
+ fmt->which);
+
+ *format = fmt->format;
+ vin_try_format(line, state, STF_VIN_PAD_SRC, format,
+ fmt->which);
+ }
+
+out:
+ return 0;
+}
+
+static int vin_init_formats(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_subdev_format format = {
+ .pad = STF_VIN_PAD_SINK,
+ .which = fh ?
+ V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE,
+ .format = {
+ .code = MEDIA_BUS_FMT_RGB565_2X8_LE,
+ .width = 1920,
+ .height = 1080
+ }
+ };
+
+ return vin_set_format(sd, fh ? fh->state : NULL, &format);
+}
+
+static void vin_output_init_addrs(struct vin_line *line)
+{
+ struct vin_output *output = &line->output;
+ struct stf_vin_dev *vin_dev = line_to_vin_dev(line);
+ dma_addr_t ping_addr;
+ dma_addr_t y_addr, uv_addr;
+
+ output->active_buf = 0;
+
+ if (output->buf[0]) {
+ ping_addr = output->buf[0]->addr[0];
+ y_addr = output->buf[0]->addr[0];
+ uv_addr = output->buf[0]->addr[1];
+ } else {
+ return;
+ }
+
+ switch (vin_map_isp_line(line->id)) {
+ case STF_ISP_LINE_SRC:
+ stf_vin_isp_set_yuv_addr(vin_dev, y_addr, uv_addr);
+ break;
+ default:
+ if (line->id == VIN_LINE_WR) {
+ stf_vin_wr_set_ping_addr(vin_dev, ping_addr);
+ stf_vin_wr_set_pong_addr(vin_dev, ping_addr);
+ }
+ break;
+ }
+}
+
+static void vin_init_outputs(struct vin_line *line)
+{
+ struct vin_output *output = &line->output;
+
+ output->state = VIN_OUTPUT_OFF;
+ output->buf[0] = NULL;
+ output->buf[1] = NULL;
+ output->active_buf = 0;
+ INIT_LIST_HEAD(&output->pending_bufs);
+ INIT_LIST_HEAD(&output->ready_bufs);
+}
+
+static void vin_buf_add_ready(struct vin_output *output,
+ struct stfcamss_buffer *buffer)
+{
+ INIT_LIST_HEAD(&buffer->queue);
+ list_add_tail(&buffer->queue, &output->ready_bufs);
+}
+
+static struct stfcamss_buffer *vin_buf_get_ready(struct vin_output *output)
+{
+ struct stfcamss_buffer *buffer = NULL;
+
+ if (!list_empty(&output->ready_bufs)) {
+ buffer = list_first_entry(&output->ready_bufs,
+ struct stfcamss_buffer,
+ queue);
+ list_del(&buffer->queue);
+ }
+
+ return buffer;
+}
+
+static void vin_buf_add_pending(struct vin_output *output,
+ struct stfcamss_buffer *buffer)
+{
+ INIT_LIST_HEAD(&buffer->queue);
+ list_add_tail(&buffer->queue, &output->pending_bufs);
+}
+
+static struct stfcamss_buffer *vin_buf_get_pending(struct vin_output *output)
+{
+ struct stfcamss_buffer *buffer = NULL;
+
+ if (!list_empty(&output->pending_bufs)) {
+ buffer = list_first_entry(&output->pending_bufs,
+ struct stfcamss_buffer,
+ queue);
+ list_del(&buffer->queue);
+ }
+
+ return buffer;
+}
+
+static void vin_buf_update_on_last(struct vin_line *line)
+{
+ struct vin_output *output = &line->output;
+
+ switch (output->state) {
+ case VIN_OUTPUT_CONTINUOUS:
+ output->state = VIN_OUTPUT_SINGLE;
+ output->active_buf = !output->active_buf;
+ break;
+ case VIN_OUTPUT_SINGLE:
+ output->state = VIN_OUTPUT_STOPPING;
+ break;
+ default:
+ break;
+ }
+}
+
+static void vin_buf_update_on_next(struct vin_line *line)
+{
+ struct vin_output *output = &line->output;
+
+ switch (output->state) {
+ case VIN_OUTPUT_CONTINUOUS:
+ output->active_buf = !output->active_buf;
+ break;
+ case VIN_OUTPUT_SINGLE:
+ default:
+ break;
+ }
+}
+
+static void vin_buf_update_on_new(struct vin_line *line,
+ struct vin_output *output,
+ struct stfcamss_buffer *new_buf)
+{
+ switch (output->state) {
+ case VIN_OUTPUT_SINGLE:
+ vin_buf_add_pending(output, new_buf);
+ break;
+ case VIN_OUTPUT_IDLE:
+ if (!output->buf[0]) {
+ output->buf[0] = new_buf;
+ vin_output_init_addrs(line);
+ output->state = VIN_OUTPUT_SINGLE;
+ } else {
+ vin_buf_add_pending(output, new_buf);
+ }
+ break;
+ case VIN_OUTPUT_STOPPING:
+ if (output->last_buffer) {
+ output->buf[output->active_buf] = output->last_buffer;
+ output->last_buffer = NULL;
+ }
+
+ output->state = VIN_OUTPUT_SINGLE;
+ vin_buf_add_pending(output, new_buf);
+ break;
+ case VIN_OUTPUT_CONTINUOUS:
+ default:
+ vin_buf_add_pending(output, new_buf);
+ break;
+ }
+}
+
+static void vin_buf_flush(struct vin_output *output,
+ enum vb2_buffer_state state)
+{
+ struct stfcamss_buffer *buf;
+ struct stfcamss_buffer *t;
+
+ list_for_each_entry_safe(buf, t, &output->pending_bufs, queue) {
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ list_del(&buf->queue);
+ }
+ list_for_each_entry_safe(buf, t, &output->ready_bufs, queue) {
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ list_del(&buf->queue);
+ }
+}
+
+static void vin_buffer_done(struct vin_line *line)
+{
+ struct stfcamss_buffer *ready_buf;
+ struct vin_output *output = &line->output;
+ unsigned long flags;
+ u64 ts = ktime_get_ns();
+
+ if (output->state == VIN_OUTPUT_OFF ||
+ output->state == VIN_OUTPUT_RESERVED)
+ return;
+
+ spin_lock_irqsave(&line->output_lock, flags);
+
+ while ((ready_buf = vin_buf_get_ready(output))) {
+ ready_buf->vb.vb2_buf.timestamp = ts;
+ ready_buf->vb.sequence = output->sequence++;
+
+ vb2_buffer_done(&ready_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+ }
+
+ spin_unlock_irqrestore(&line->output_lock, flags);
+}
+
+static void vin_change_buffer(struct vin_line *line)
+{
+ struct stfcamss_buffer *ready_buf;
+ struct vin_output *output = &line->output;
+ struct stf_vin_dev *vin_dev = line_to_vin_dev(line);
+ dma_addr_t *new_addr;
+ unsigned long flags;
+ u32 active_index;
+
+ if (output->state == VIN_OUTPUT_OFF ||
+ output->state == VIN_OUTPUT_STOPPING ||
+ output->state == VIN_OUTPUT_RESERVED ||
+ output->state == VIN_OUTPUT_IDLE)
+ return;
+
+ spin_lock_irqsave(&line->output_lock, flags);
+
+ active_index = output->active_buf;
+
+ ready_buf = output->buf[active_index];
+ if (!ready_buf) {
+ dev_warn(vin_dev->stfcamss->dev, "Missing ready buf %d %d!\n",
+ active_index, output->state);
+ active_index = !active_index;
+ ready_buf = output->buf[active_index];
+ if (!ready_buf) {
+ dev_err(vin_dev->stfcamss->dev,
+ "Missing ready buf2 %d %d!\n",
+ active_index, output->state);
+ goto out_unlock;
+ }
+ }
+
+ /* Get next buffer */
+ output->buf[active_index] = vin_buf_get_pending(output);
+ if (!output->buf[active_index]) {
+ /* No next buffer - set same address */
+ new_addr = ready_buf->addr;
+ vin_buf_update_on_last(line);
+ } else {
+ new_addr = output->buf[active_index]->addr;
+ vin_buf_update_on_next(line);
+ }
+
+ if (output->state == VIN_OUTPUT_STOPPING) {
+ output->last_buffer = ready_buf;
+ } else {
+ switch (vin_map_isp_line(line->id)) {
+ case STF_ISP_LINE_SRC:
+ stf_vin_isp_set_yuv_addr(vin_dev,
+ new_addr[0],
+ new_addr[1]);
+ break;
+ default:
+ if (line->id == VIN_LINE_WR) {
+ stf_vin_wr_set_ping_addr(vin_dev, new_addr[0]);
+ stf_vin_wr_set_pong_addr(vin_dev, new_addr[0]);
+ }
+ break;
+ }
+
+ vin_buf_add_ready(output, ready_buf);
+ }
+
+ spin_unlock_irqrestore(&line->output_lock, flags);
+ return;
+
+out_unlock:
+ spin_unlock_irqrestore(&line->output_lock, flags);
+}
+
+static int vin_queue_buffer(struct stfcamss_video *vid,
+ struct stfcamss_buffer *buf)
+{
+ struct vin_line *line = container_of(vid, struct vin_line, video_out);
+ struct vin_output *output;
+ unsigned long flags;
+
+ output = &line->output;
+
+ spin_lock_irqsave(&line->output_lock, flags);
+
+ vin_buf_update_on_new(line, output, buf);
+
+ spin_unlock_irqrestore(&line->output_lock, flags);
+
+ return 0;
+}
+
+static int vin_flush_buffers(struct stfcamss_video *vid,
+ enum vb2_buffer_state state)
+{
+ struct vin_line *line = container_of(vid, struct vin_line, video_out);
+ struct vin_output *output = &line->output;
+ unsigned long flags;
+
+ spin_lock_irqsave(&line->output_lock, flags);
+
+ vin_buf_flush(output, state);
+ if (output->buf[0])
+ vb2_buffer_done(&output->buf[0]->vb.vb2_buf, state);
+
+ if (output->buf[1])
+ vb2_buffer_done(&output->buf[1]->vb.vb2_buf, state);
+
+ if (output->last_buffer) {
+ vb2_buffer_done(&output->last_buffer->vb.vb2_buf, state);
+ output->last_buffer = NULL;
+ }
+ output->buf[0] = NULL;
+ output->buf[1] = NULL;
+
+ spin_unlock_irqrestore(&line->output_lock, flags);
+ return 0;
+}
+
+static int vin_link_setup(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags)
+{
+ if (flags & MEDIA_LNK_FL_ENABLED)
+ if (media_pad_remote_pad_first(local))
+ return -EBUSY;
+ return 0;
+}
+
+static const struct v4l2_subdev_video_ops vin_video_ops = {
+ .s_stream = vin_set_stream,
+};
+
+static const struct v4l2_subdev_pad_ops vin_pad_ops = {
+ .enum_mbus_code = vin_enum_mbus_code,
+ .enum_frame_size = vin_enum_frame_size,
+ .get_fmt = vin_get_format,
+ .set_fmt = vin_set_format,
+};
+
+static const struct v4l2_subdev_ops vin_v4l2_ops = {
+ .video = &vin_video_ops,
+ .pad = &vin_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops vin_v4l2_internal_ops = {
+ .open = vin_init_formats,
+};
+
+static const struct stfcamss_video_ops stfcamss_vin_video_ops = {
+ .queue_buffer = vin_queue_buffer,
+ .flush_buffers = vin_flush_buffers,
+};
+
+static const struct media_entity_operations vin_media_ops = {
+ .link_setup = vin_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+int stf_vin_register(struct stf_vin_dev *vin_dev, struct v4l2_device *v4l2_dev)
+{
+ struct v4l2_subdev *sd;
+ struct stfcamss_video *video_out;
+ struct media_pad *pads;
+ int ret;
+ int i;
+
+ for (i = 0; i < STF_ISP_LINE_MAX + 1; i++) {
+ char name[32];
+ char *sub_name = vin_get_line_subdevname(i);
+
+ sd = &vin_dev->line[i].subdev;
+ pads = vin_dev->line[i].pads;
+ video_out = &vin_dev->line[i].video_out;
+ video_out->id = i;
+
+ vin_init_outputs(&vin_dev->line[i]);
+
+ v4l2_subdev_init(sd, &vin_v4l2_ops);
+ sd->internal_ops = &vin_v4l2_internal_ops;
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d_%s",
+ STF_VIN_NAME, 0, sub_name);
+ v4l2_set_subdevdata(sd, &vin_dev->line[i]);
+
+ ret = vin_init_formats(sd, NULL);
+ if (ret < 0) {
+ dev_err(vin_dev->stfcamss->dev,
+ "Failed to init format: %d\n", ret);
+ goto err_init;
+ }
+
+ pads[STF_VIN_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ pads[STF_VIN_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
+
+ sd->entity.function =
+ MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER;
+ sd->entity.ops = &vin_media_ops;
+ ret = media_entity_pads_init(&sd->entity,
+ STF_VIN_PADS_NUM, pads);
+ if (ret < 0) {
+ dev_err(vin_dev->stfcamss->dev,
+ "Failed to init media entity: %d\n",
+ ret);
+ goto err_init;
+ }
+
+ ret = v4l2_device_register_subdev(v4l2_dev, sd);
+ if (ret < 0) {
+ dev_err(vin_dev->stfcamss->dev,
+ "Failed to register subdev: %d\n", ret);
+ goto err_reg_subdev;
+ }
+
+ video_out->ops = &stfcamss_vin_video_ops;
+ video_out->bpl_alignment = 16 * 8;
+
+ snprintf(name, ARRAY_SIZE(name), "%s_%s%d",
+ sd->name, "video", i);
+ ret = stf_video_register(video_out, v4l2_dev, name);
+ if (ret < 0) {
+ dev_err(vin_dev->stfcamss->dev,
+ "Failed to register video node: %d\n", ret);
+ goto err_vid_reg;
+ }
+
+ ret = media_create_pad_link(
+ &sd->entity, STF_VIN_PAD_SRC,
+ &video_out->vdev.entity, 0,
+ MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED);
+ if (ret < 0) {
+ dev_err(vin_dev->stfcamss->dev,
+ "Failed to link %s->%s entities: %d\n",
+ sd->entity.name, video_out->vdev.entity.name,
+ ret);
+ goto err_create_link;
+ }
+ }
+
+ return 0;
+
+err_create_link:
+ stf_video_unregister(video_out);
+err_vid_reg:
+ v4l2_device_unregister_subdev(sd);
+err_reg_subdev:
+ media_entity_cleanup(&sd->entity);
+err_init:
+ for (i--; i >= 0; i--) {
+ sd = &vin_dev->line[i].subdev;
+ video_out = &vin_dev->line[i].video_out;
+
+ stf_video_unregister(video_out);
+ v4l2_device_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ }
+ return ret;
+}
+
+int stf_vin_unregister(struct stf_vin_dev *vin_dev)
+{
+ struct v4l2_subdev *sd;
+ struct stfcamss_video *video_out;
+ int i;
+
+ for (i = 0; i < STF_DUMMY_MODULE_NUMS; i++)
+ mutex_destroy(&vin_dev->dummy_buffer[i].stream_lock);
+
+ for (i = 0; i < STF_ISP_LINE_MAX + 1; i++) {
+ sd = &vin_dev->line[i].subdev;
+ video_out = &vin_dev->line[i].video_out;
+
+ stf_video_unregister(video_out);
+ v4l2_device_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ mutex_destroy(&vin_dev->line[i].stream_lock);
+ }
+ return 0;
+}
diff --git a/drivers/media/platform/starfive/camss/stf_vin.h b/drivers/media/platform/starfive/camss/stf_vin.h
new file mode 100644
index 000000000000..28572eb6abe4
--- /dev/null
+++ b/drivers/media/platform/starfive/camss/stf_vin.h
@@ -0,0 +1,173 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * stf_vin.h
+ *
+ * StarFive Camera Subsystem - VIN Module
+ *
+ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
+ */
+
+#ifndef STF_VIN_H
+#define STF_VIN_H
+
+#include <linux/interrupt.h>
+#include <linux/spinlock_types.h>
+#include <media/v4l2-subdev.h>
+
+#include "stf_video.h"
+
+#define SYSCONSAIF_SYSCFG(x) (x)
+
+/* syscon offset 0 */
+#define U0_VIN_CNFG_AXI_DVP_EN BIT(2)
+
+/* syscon offset 20 */
+#define U0_VIN_CHANNEL_SEL_MASK GENMASK(3, 0)
+#define U0_VIN_AXIWR0_EN BIT(4)
+#define CHANNEL(x) ((x) << 0)
+
+/* syscon offset 32 */
+#define U0_VIN_INTR_CLEAN BIT(0)
+#define U0_VIN_INTR_M BIT(1)
+#define U0_VIN_PIX_CNT_END_MASK GENMASK(12, 2)
+#define U0_VIN_PIX_CT_MASK GENMASK(14, 13)
+#define U0_VIN_PIXEL_HEIGH_BIT_SEL_MAKS GENMASK(16, 15)
+
+#define PIX_CNT_END(x) ((x) << 2)
+#define PIX_CT(x) ((x) << 13)
+#define PIXEL_HEIGH_BIT_SEL(x) ((x) << 15)
+
+/* syscon offset 36 */
+#define U0_VIN_CNFG_DVP_HS_POS BIT(1)
+#define U0_VIN_CNFG_DVP_SWAP_EN BIT(2)
+#define U0_VIN_CNFG_DVP_VS_POS BIT(3)
+#define U0_VIN_CNFG_GEN_EN_AXIRD BIT(4)
+#define U0_VIN_CNFG_ISP_DVP_EN0 BIT(5)
+#define U0_VIN_MIPI_BYTE_EN_ISP0(n) ((n) << 6)
+#define U0_VIN_MIPI_CHANNEL_SEL0(n) ((n) << 8)
+#define U0_VIN_P_I_MIPI_HAEDER_EN0(n) ((n) << 12)
+#define U0_VIN_PIX_NUM(n) ((n) << 13)
+#define U0_VIN_MIPI_BYTE_EN_ISP0_MASK GENMASK(7, 6)
+#define U0_VIN_MIPI_CHANNEL_SEL0_MASK GENMASK(11, 8)
+#define U0_VIN_P_I_MIPI_HAEDER_EN0_MASK BIT(12)
+#define U0_VIN_PIX_NUM_MASK GENMASK(16, 13)
+
+#define STF_VIN_PAD_SINK 0
+#define STF_VIN_PAD_SRC 1
+#define STF_VIN_PADS_NUM 2
+
+#define ISP_DUMMY_BUFFER_NUMS STF_ISP_PAD_MAX
+#define VIN_DUMMY_BUFFER_NUMS 1
+
+enum {
+ STF_DUMMY_VIN,
+ STF_DUMMY_ISP,
+ STF_DUMMY_MODULE_NUMS,
+};
+
+enum link {
+ LINK_ERROR = -1,
+ LINK_DVP_TO_WR,
+ LINK_DVP_TO_ISP,
+ LINK_CSI_TO_WR,
+ LINK_CSI_TO_ISP,
+};
+
+struct vin_format {
+ u32 code;
+ u8 bpp;
+};
+
+struct vin_format_table {
+ const struct vin_format *fmts;
+ int nfmts;
+};
+
+enum vin_output_state {
+ VIN_OUTPUT_OFF,
+ VIN_OUTPUT_RESERVED,
+ VIN_OUTPUT_SINGLE,
+ VIN_OUTPUT_CONTINUOUS,
+ VIN_OUTPUT_IDLE,
+ VIN_OUTPUT_STOPPING
+};
+
+struct vin_output {
+ int active_buf;
+ struct stfcamss_buffer *buf[2];
+ struct stfcamss_buffer *last_buffer;
+ struct list_head pending_bufs;
+ struct list_head ready_bufs;
+ enum vin_output_state state;
+ unsigned int sequence;
+ unsigned int frame_skip;
+};
+
+/* The vin output lines */
+enum vin_line_id {
+ VIN_LINE_NONE = -1,
+ VIN_LINE_WR = 0,
+ VIN_LINE_ISP,
+ VIN_LINE_MAX,
+};
+
+struct vin_line {
+ enum vin_line_id id;
+ struct v4l2_subdev subdev;
+ struct media_pad pads[STF_VIN_PADS_NUM];
+ struct v4l2_mbus_framefmt fmt[STF_VIN_PADS_NUM];
+ struct stfcamss_video video_out;
+ struct mutex stream_lock; /* serialize stream control */
+ int stream_count;
+ struct vin_output output; /* pipeline and stream states */
+ spinlock_t output_lock;
+ const struct vin_format *formats;
+ unsigned int nformats;
+};
+
+struct vin_dummy_buffer {
+ dma_addr_t paddr[3];
+ void *vaddr;
+ u32 buffer_size;
+ u32 width;
+ u32 height;
+ u32 mcode;
+};
+
+struct dummy_buffer {
+ struct vin_dummy_buffer *buffer;
+ u32 nums;
+ struct mutex stream_lock; /* protects buffer data */
+ int stream_count;
+ atomic_t frame_skip;
+};
+
+struct vin_isr_ops {
+ void (*isr_buffer_done)(struct vin_line *line);
+ void (*isr_change_buffer)(struct vin_line *line);
+};
+
+struct stf_vin_dev {
+ struct stfcamss *stfcamss;
+ struct vin_line line[VIN_LINE_MAX];
+ struct dummy_buffer dummy_buffer[STF_DUMMY_MODULE_NUMS];
+ struct vin_isr_ops *isr_ops;
+ atomic_t ref_count;
+};
+
+int stf_vin_wr_stream_set(struct stf_vin_dev *vin_dev);
+int stf_vin_stream_set(struct stf_vin_dev *vin_dev, enum link link);
+void stf_vin_wr_irq_enable(struct stf_vin_dev *vin_dev, int enable);
+void stf_vin_wr_set_ping_addr(struct stf_vin_dev *vin_dev, dma_addr_t addr);
+void stf_vin_wr_set_pong_addr(struct stf_vin_dev *vin_dev, dma_addr_t addr);
+void stf_vin_isp_set_yuv_addr(struct stf_vin_dev *vin_dev,
+ dma_addr_t y_addr, dma_addr_t uv_addr);
+irqreturn_t stf_vin_wr_irq_handler(int irq, void *priv);
+irqreturn_t stf_vin_isp_irq_handler(int irq, void *priv);
+irqreturn_t stf_vin_isp_irq_csiline_handler(int irq, void *priv);
+int stf_vin_subdev_init(struct stfcamss *stfcamss);
+int stf_vin_register(struct stf_vin_dev *vin_dev, struct v4l2_device *v4l2_dev);
+int stf_vin_unregister(struct stf_vin_dev *vin_dev);
+enum isp_pad_id stf_vin_map_isp_pad(enum vin_line_id line, enum isp_pad_id def);
+
+#endif /* STF_VIN_H */
diff --git a/drivers/media/platform/starfive/camss/stf_vin_hw_ops.c b/drivers/media/platform/starfive/camss/stf_vin_hw_ops.c
new file mode 100644
index 000000000000..7bd3265128d0
--- /dev/null
+++ b/drivers/media/platform/starfive/camss/stf_vin_hw_ops.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * stf_vin_hw_ops.c
+ *
+ * Register interface file for StarFive VIN module driver
+ *
+ * Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
+ */
+#include "stf_camss.h"
+
+static void vin_intr_clear(struct stfcamss *stfcamss)
+{
+ stf_syscon_reg_set_bit(stfcamss, SYSCONSAIF_SYSCFG(28),
+ U0_VIN_INTR_CLEAN);
+ stf_syscon_reg_clear_bit(stfcamss, SYSCONSAIF_SYSCFG(28),
+ U0_VIN_INTR_CLEAN);
+}
+
+irqreturn_t stf_vin_wr_irq_handler(int irq, void *priv)
+{
+ struct stf_vin_dev *vin_dev = priv;
+ struct stfcamss *stfcamss = vin_dev->stfcamss;
+ struct dummy_buffer *dummy_buffer =
+ &vin_dev->dummy_buffer[STF_DUMMY_VIN];
+
+ if (atomic_dec_if_positive(&dummy_buffer->frame_skip) < 0) {
+ vin_dev->isr_ops->isr_change_buffer(&vin_dev->line[VIN_LINE_WR]);
+ vin_dev->isr_ops->isr_buffer_done(&vin_dev->line[VIN_LINE_WR]);
+ }
+
+ vin_intr_clear(stfcamss);
+
+ return IRQ_HANDLED;
+}
+
+irqreturn_t stf_vin_isp_irq_handler(int irq, void *priv)
+{
+ struct stf_vin_dev *vin_dev = priv;
+ u32 int_status;
+
+ int_status = stf_isp_reg_read(vin_dev->stfcamss, ISP_REG_ISP_CTRL_0);
+
+ if (int_status & ISPC_INTS) {
+ if ((int_status & ISPC_ENUO))
+ vin_dev->isr_ops->isr_buffer_done(
+ &vin_dev->line[VIN_LINE_ISP]);
+
+ /* clear interrupt */
+ stf_isp_reg_write(vin_dev->stfcamss,
+ ISP_REG_ISP_CTRL_0,
+ (int_status & ~EN_INT_ALL) |
+ EN_INT_ISP_DONE |
+ EN_INT_CSI_DONE |
+ EN_INT_SC_DONE);
+ }
+
+ return IRQ_HANDLED;
+}
+
+irqreturn_t stf_vin_isp_irq_csiline_handler(int irq, void *priv)
+{
+ struct stf_vin_dev *vin_dev = priv;
+ struct stf_isp_dev *isp_dev;
+ u32 int_status;
+
+ isp_dev = &vin_dev->stfcamss->isp_dev;
+
+ int_status = stf_isp_reg_read(vin_dev->stfcamss, ISP_REG_ISP_CTRL_0);
+ if (int_status & ISPC_SCFEINT) {
+ struct dummy_buffer *dummy_buffer =
+ &vin_dev->dummy_buffer[STF_DUMMY_ISP];
+
+ if (atomic_dec_if_positive(&dummy_buffer->frame_skip) < 0) {
+ if ((int_status & ISPC_ENUO))
+ vin_dev->isr_ops->isr_change_buffer(
+ &vin_dev->line[VIN_LINE_ISP]);
+ }
+
+ stf_isp_reg_set_bit(isp_dev->stfcamss, ISP_REG_CSIINTS,
+ CSI_INTS_MASK, CSI_INTS(0x3));
+ stf_isp_reg_set_bit(isp_dev->stfcamss, ISP_REG_IESHD,
+ SHAD_UP_M | SHAD_UP_EN, 0x3);
+
+ /* clear interrupt */
+ stf_isp_reg_write(vin_dev->stfcamss, ISP_REG_ISP_CTRL_0,
+ (int_status & ~EN_INT_ALL) | EN_INT_LINE_INT);
+ }
+
+ return IRQ_HANDLED;
+}
+
+int stf_vin_wr_stream_set(struct stf_vin_dev *vin_dev)
+{
+ struct stfcamss *stfcamss = vin_dev->stfcamss;
+
+ stf_syscon_reg_set_bit(stfcamss, SYSCONSAIF_SYSCFG(20),
+ U0_VIN_AXIWR0_EN);
+
+ return 0;
+}
+
+int stf_vin_stream_set(struct stf_vin_dev *vin_dev, enum link link)
+{
+ struct stfcamss *stfcamss = vin_dev->stfcamss;
+ u32 val;
+
+ switch (link) {
+ case LINK_CSI_TO_WR:
+ val = stf_syscon_reg_read(stfcamss, SYSCONSAIF_SYSCFG(20));
+ val &= ~U0_VIN_CHANNEL_SEL_MASK;
+ val |= CHANNEL(0);
+ stf_syscon_reg_write(stfcamss, SYSCONSAIF_SYSCFG(20), val);
+
+ val = stf_syscon_reg_read(stfcamss, SYSCONSAIF_SYSCFG(28));
+ val &= ~U0_VIN_PIX_CT_MASK;
+ val |= PIX_CT(1);
+
+ val &= ~U0_VIN_PIXEL_HEIGH_BIT_SEL_MAKS;
+ val |= PIXEL_HEIGH_BIT_SEL(0);
+
+ val &= ~U0_VIN_PIX_CNT_END_MASK;
+ val |= PIX_CNT_END(IMAGE_MAX_WIDTH / 4 - 1);
+
+ stf_syscon_reg_write(stfcamss, SYSCONSAIF_SYSCFG(28), val);
+ break;
+ case LINK_CSI_TO_ISP:
+ val = stf_syscon_reg_read(stfcamss, SYSCONSAIF_SYSCFG(36));
+ val &= ~U0_VIN_MIPI_BYTE_EN_ISP0_MASK;
+ val |= U0_VIN_MIPI_BYTE_EN_ISP0(0);
+
+ val &= ~U0_VIN_MIPI_CHANNEL_SEL0_MASK;
+ val |= U0_VIN_MIPI_CHANNEL_SEL0(0);
+
+ val &= ~U0_VIN_PIX_NUM_MASK;
+ val |= U0_VIN_PIX_NUM(0);
+
+ val &= ~U0_VIN_P_I_MIPI_HAEDER_EN0_MASK;
+ val |= U0_VIN_P_I_MIPI_HAEDER_EN0(1);
+
+ stf_syscon_reg_write(stfcamss, SYSCONSAIF_SYSCFG(36), val);
+ break;
+ case LINK_DVP_TO_WR:
+ case LINK_DVP_TO_ISP:
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void stf_vin_wr_irq_enable(struct stf_vin_dev *vin_dev, int enable)
+{
+ struct stfcamss *stfcamss = vin_dev->stfcamss;
+
+ if (enable) {
+ stf_syscon_reg_clear_bit(stfcamss, SYSCONSAIF_SYSCFG(28),
+ U0_VIN_INTR_M);
+ } else {
+ /* clear vin interrupt */
+ stf_syscon_reg_set_bit(stfcamss, SYSCONSAIF_SYSCFG(28),
+ U0_VIN_INTR_CLEAN);
+ stf_syscon_reg_clear_bit(stfcamss, SYSCONSAIF_SYSCFG(28),
+ U0_VIN_INTR_CLEAN);
+ stf_syscon_reg_set_bit(stfcamss, SYSCONSAIF_SYSCFG(28),
+ U0_VIN_INTR_M);
+ }
+}
+
+void stf_vin_wr_set_ping_addr(struct stf_vin_dev *vin_dev, dma_addr_t addr)
+{
+ struct stfcamss *stfcamss = vin_dev->stfcamss;
+
+ /* set the start address */
+ stf_syscon_reg_write(stfcamss, SYSCONSAIF_SYSCFG(32), (long)addr);
+}
+
+void stf_vin_wr_set_pong_addr(struct stf_vin_dev *vin_dev, dma_addr_t addr)
+{
+ struct stfcamss *stfcamss = vin_dev->stfcamss;
+
+ /* set the start address */
+ stf_syscon_reg_write(stfcamss, SYSCONSAIF_SYSCFG(24), (long)addr);
+}
+
+void stf_vin_isp_set_yuv_addr(struct stf_vin_dev *vin_dev,
+ dma_addr_t y_addr, dma_addr_t uv_addr)
+{
+ stf_isp_reg_write(vin_dev->stfcamss,
+ ISP_REG_Y_PLANE_START_ADDR, y_addr);
+ stf_isp_reg_write(vin_dev->stfcamss,
+ ISP_REG_UV_PLANE_START_ADDR, uv_addr);
+}
--
2.34.1