Isp4 sub-device is implementing v4l2 sub-device interface. It has one
capture video node, and supports only preview stream. It manages firmware
states, stream configuration. Add interrupt handling and notification for
isp firmware to isp-subdevice.
Co-developed-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Co-developed-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Svetoslav Stoilov <Svetoslav.Stoilov@amd.com>
Signed-off-by: Bin Du <Bin.Du@amd.com>
Tested-by: Alexey Zagorodnikov <xglooom@gmail.com>
---
MAINTAINERS | 2 +
drivers/media/platform/amd/isp4/Makefile | 3 +-
drivers/media/platform/amd/isp4/isp4.c | 98 +-
drivers/media/platform/amd/isp4/isp4.h | 7 +-
drivers/media/platform/amd/isp4/isp4_subdev.c | 1004 +++++++++++++++++
drivers/media/platform/amd/isp4/isp4_subdev.h | 123 ++
6 files changed, 1229 insertions(+), 8 deletions(-)
create mode 100644 drivers/media/platform/amd/isp4/isp4_subdev.c
create mode 100644 drivers/media/platform/amd/isp4/isp4_subdev.h
diff --git a/MAINTAINERS b/MAINTAINERS
index cccae369c876..48ffc8bbdcee 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1149,6 +1149,8 @@ F: drivers/media/platform/amd/isp4/isp4_fw_cmd_resp.h
F: drivers/media/platform/amd/isp4/isp4_hw_reg.h
F: drivers/media/platform/amd/isp4/isp4_interface.c
F: drivers/media/platform/amd/isp4/isp4_interface.h
+F: drivers/media/platform/amd/isp4/isp4_subdev.c
+F: drivers/media/platform/amd/isp4/isp4_subdev.h
AMD KFD
M: Felix Kuehling <Felix.Kuehling@amd.com>
diff --git a/drivers/media/platform/amd/isp4/Makefile b/drivers/media/platform/amd/isp4/Makefile
index a2a5bf98e912..6d4e6d6ac7f5 100644
--- a/drivers/media/platform/amd/isp4/Makefile
+++ b/drivers/media/platform/amd/isp4/Makefile
@@ -4,4 +4,5 @@
obj-$(CONFIG_AMD_ISP4) += amd_capture.o
amd_capture-objs := isp4.o \
- isp4_interface.o
+ isp4_interface.o \
+ isp4_subdev.o
diff --git a/drivers/media/platform/amd/isp4/isp4.c b/drivers/media/platform/amd/isp4/isp4.c
index e77713e4ea56..0f3d87b7d5fa 100644
--- a/drivers/media/platform/amd/isp4/isp4.c
+++ b/drivers/media/platform/amd/isp4/isp4.c
@@ -3,15 +3,19 @@
* Copyright (C) 2025 Advanced Micro Devices, Inc.
*/
+#include <linux/irq.h>
#include <linux/pm_runtime.h>
#include <linux/vmalloc.h>
+#include <media/v4l2-fwnode.h>
#include <media/v4l2-ioctl.h>
#include "isp4.h"
-
-#define VIDEO_BUF_NUM 5
+#include "isp4_hw_reg.h"
#define ISP4_DRV_NAME "amd_isp_capture"
+#define ISP4_FW_RESP_RB_IRQ_STATUS_MASK \
+ (ISP_SYS_INT0_STATUS__SYS_INT_RINGBUFFER_WPT9_INT_MASK | \
+ ISP_SYS_INT0_STATUS__SYS_INT_RINGBUFFER_WPT12_INT_MASK)
static const struct {
const char *name;
@@ -19,27 +23,96 @@ static const struct {
u32 en_mask;
u32 ack_mask;
u32 rb_int_num;
-} isp4_irq[] = {
+} isp4_irq[ISP4SD_MAX_FW_RESP_STREAM_NUM] = {
/* The IRQ order is aligned with the isp4_subdev.fw_resp_thread order */
{
.name = "isp_irq_global",
+ .status_mask = ISP_SYS_INT0_STATUS__SYS_INT_RINGBUFFER_WPT12_INT_MASK,
+ .en_mask = ISP_SYS_INT0_EN__SYS_INT_RINGBUFFER_WPT12_EN_MASK,
+ .ack_mask = ISP_SYS_INT0_ACK__SYS_INT_RINGBUFFER_WPT12_ACK_MASK,
.rb_int_num = 4, /* ISP_4_1__SRCID__ISP_RINGBUFFER_WPT12 */
},
{
.name = "isp_irq_stream1",
+ .status_mask = ISP_SYS_INT0_STATUS__SYS_INT_RINGBUFFER_WPT9_INT_MASK,
+ .en_mask = ISP_SYS_INT0_EN__SYS_INT_RINGBUFFER_WPT9_EN_MASK,
+ .ack_mask = ISP_SYS_INT0_ACK__SYS_INT_RINGBUFFER_WPT9_ACK_MASK,
.rb_int_num = 0, /* ISP_4_1__SRCID__ISP_RINGBUFFER_WPT9 */
},
};
+void isp4_intr_enable(struct isp4_subdev *isp_subdev, u32 index, bool enable)
+{
+ u32 intr_en;
+
+ /* Synchronize ISP_SYS_INT0_EN writes with the IRQ handler's writes */
+ spin_lock_irq(&isp_subdev->irq_lock);
+ intr_en = isp4hw_rreg(isp_subdev->mmio, ISP_SYS_INT0_EN);
+ if (enable)
+ intr_en |= isp4_irq[index].en_mask;
+ else
+ intr_en &= ~isp4_irq[index].en_mask;
+ isp4hw_wreg(isp_subdev->mmio, ISP_SYS_INT0_EN, intr_en);
+ spin_unlock_irq(&isp_subdev->irq_lock);
+}
+
+static void isp4_wake_up_resp_thread(struct isp4_subdev *isp_subdev, u32 index)
+{
+ struct isp4sd_thread_handler *thread_ctx = &isp_subdev->fw_resp_thread[index];
+
+ thread_ctx->resp_ready = true;
+ wake_up_interruptible(&thread_ctx->waitq);
+}
+
static irqreturn_t isp4_irq_handler(int irq, void *arg)
{
+ struct isp4_subdev *isp_subdev = arg;
+ u32 intr_ack = 0, intr_en = 0, intr_status;
+ int seen = 0;
+
+ /* Get the ISP_SYS interrupt status */
+ intr_status = isp4hw_rreg(isp_subdev->mmio, ISP_SYS_INT0_STATUS);
+ intr_status &= ISP4_FW_RESP_RB_IRQ_STATUS_MASK;
+
+ /* Find which ISP_SYS interrupts fired */
+ for (size_t i = 0; i < ARRAY_SIZE(isp4_irq); i++) {
+ if (intr_status & isp4_irq[i].status_mask) {
+ intr_ack |= isp4_irq[i].ack_mask;
+ intr_en |= isp4_irq[i].en_mask;
+ seen |= BIT(i);
+ }
+ }
+
+ /*
+ * Disable the ISP_SYS interrupts that fired. Must be done before waking
+ * the response threads, since they re-enable interrupts when finished.
+ * The lock synchronizes RMW of INT0_EN with isp4_enable_interrupt().
+ */
+ spin_lock(&isp_subdev->irq_lock);
+ intr_en = isp4hw_rreg(isp_subdev->mmio, ISP_SYS_INT0_EN) & ~intr_en;
+ isp4hw_wreg(isp_subdev->mmio, ISP_SYS_INT0_EN, intr_en);
+ spin_unlock(&isp_subdev->irq_lock);
+
+ /*
+ * Clear the ISP_SYS interrupts. This must be done after the interrupts
+ * are disabled, so that ISP FW won't flag any new interrupts on these
+ * streams, and thus we don't need to clear interrupts again before
+ * re-enabling them in the response thread.
+ */
+ isp4hw_wreg(isp_subdev->mmio, ISP_SYS_INT0_ACK, intr_ack);
+
+ /* Wake up the response threads */
+ for (int i; (i = ffs(seen)); seen = (seen >> i) << i)
+ isp4_wake_up_resp_thread(isp_subdev, i - 1);
+
return IRQ_HANDLED;
}
static int isp4_capture_probe(struct platform_device *pdev)
{
+ int irq[ISP4SD_MAX_FW_RESP_STREAM_NUM];
struct device *dev = &pdev->dev;
- int irq[ARRAY_SIZE(isp4_irq)];
+ struct isp4_subdev *isp_subdev;
struct isp4_device *isp_dev;
size_t i;
int ret;
@@ -50,6 +123,11 @@ static int isp4_capture_probe(struct platform_device *pdev)
dev->init_name = ISP4_DRV_NAME;
+ isp_subdev = &isp_dev->isp_subdev;
+ isp_subdev->mmio = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(isp_subdev->mmio))
+ return dev_err_probe(dev, PTR_ERR(isp_subdev->mmio), "isp ioremap fail\n");
+
for (i = 0; i < ARRAY_SIZE(isp4_irq); i++) {
irq[i] = platform_get_irq(pdev, isp4_irq[i].rb_int_num);
if (irq[i] < 0)
@@ -57,7 +135,7 @@ static int isp4_capture_probe(struct platform_device *pdev)
isp4_irq[i].rb_int_num);
ret = devm_request_irq(dev, irq[i], isp4_irq_handler,
- IRQF_NO_AUTOEN, isp4_irq[i].name, dev);
+ IRQF_NO_AUTOEN, isp4_irq[i].name, isp_subdev);
if (ret)
return dev_err_probe(dev, ret, "fail to req irq %d\n", irq[i]);
}
@@ -83,6 +161,13 @@ static int isp4_capture_probe(struct platform_device *pdev)
pm_runtime_set_suspended(dev);
pm_runtime_enable(dev);
+ spin_lock_init(&isp_subdev->irq_lock);
+ ret = isp4sd_init(&isp_dev->isp_subdev, &isp_dev->v4l2_dev, irq);
+ if (ret) {
+ dev_err_probe(dev, ret, "fail init isp4 sub dev\n");
+ goto err_pm_disable;
+ }
+
ret = media_device_register(&isp_dev->mdev);
if (ret) {
dev_err_probe(dev, ret, "fail to register media device\n");
@@ -94,6 +179,8 @@ static int isp4_capture_probe(struct platform_device *pdev)
return 0;
err_isp4_deinit:
+ isp4sd_deinit(&isp_dev->isp_subdev);
+err_pm_disable:
pm_runtime_disable(dev);
v4l2_device_unregister(&isp_dev->v4l2_dev);
err_clean_media:
@@ -108,6 +195,7 @@ static void isp4_capture_remove(struct platform_device *pdev)
struct device *dev = &pdev->dev;
media_device_unregister(&isp_dev->mdev);
+ isp4sd_deinit(&isp_dev->isp_subdev);
v4l2_device_unregister(&isp_dev->v4l2_dev);
media_device_cleanup(&isp_dev->mdev);
pm_runtime_disable(dev);
diff --git a/drivers/media/platform/amd/isp4/isp4.h b/drivers/media/platform/amd/isp4/isp4.h
index 7f2db0dfa2d9..2db6683d6d8b 100644
--- a/drivers/media/platform/amd/isp4/isp4.h
+++ b/drivers/media/platform/amd/isp4/isp4.h
@@ -6,12 +6,15 @@
#ifndef _ISP4_H_
#define _ISP4_H_
-#include <media/v4l2-device.h>
-#include <media/videobuf2-memops.h>
+#include <drm/amd/isp.h>
+#include "isp4_subdev.h"
struct isp4_device {
struct v4l2_device v4l2_dev;
+ struct isp4_subdev isp_subdev;
struct media_device mdev;
};
+void isp4_intr_enable(struct isp4_subdev *isp_subdev, u32 index, bool enable);
+
#endif /* _ISP4_H_ */
diff --git a/drivers/media/platform/amd/isp4/isp4_subdev.c b/drivers/media/platform/amd/isp4/isp4_subdev.c
new file mode 100644
index 000000000000..fac16207727e
--- /dev/null
+++ b/drivers/media/platform/amd/isp4/isp4_subdev.c
@@ -0,0 +1,1004 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2025 Advanced Micro Devices, Inc.
+ */
+
+#include <linux/pm_domain.h>
+#include <linux/units.h>
+
+#include "isp4_fw_cmd_resp.h"
+#include "isp4_interface.h"
+#include "isp4.h"
+
+#define ISP4SD_MIN_BUF_CNT_BEF_START_STREAM 4
+
+#define ISP4SD_PERFORMANCE_STATE_LOW 0
+#define ISP4SD_PERFORMANCE_STATE_HIGH 1
+
+/* align 32KB */
+#define ISP4SD_META_BUF_SIZE ALIGN(sizeof(struct isp4fw_meta_info), 0x8000)
+
+#define to_isp4_subdev(v4l2_sdev) \
+ container_of(v4l2_sdev, struct isp4_subdev, sdev)
+
+static const char *isp4sd_entity_name = "amd isp4";
+
+static const char *isp4sd_thread_name[ISP4SD_MAX_FW_RESP_STREAM_NUM] = {
+ "amd_isp4_thread_global",
+ "amd_isp4_thread_stream1",
+};
+
+static void isp4sd_module_enable(struct isp4_subdev *isp_subdev, bool enable)
+{
+ if (isp_subdev->enable_gpio) {
+ gpiod_set_value(isp_subdev->enable_gpio, enable ? 1 : 0);
+ dev_dbg(isp_subdev->dev, "%s isp_subdev module\n",
+ enable ? "enable" : "disable");
+ }
+}
+
+static int isp4sd_setup_fw_mem_pool(struct isp4_subdev *isp_subdev)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct isp4fw_cmd_send_buffer buf_type;
+ struct device *dev = isp_subdev->dev;
+ int ret;
+
+ if (!ispif->fw_mem_pool) {
+ dev_err(dev, "fail to alloc mem pool\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * The struct will be shared with ISP FW, use memset() to guarantee padding bits are
+ * zeroed, since this is not guaranteed on all compilers.
+ */
+ memset(&buf_type, 0, sizeof(buf_type));
+ buf_type.buffer_type = BUFFER_TYPE_MEM_POOL;
+ buf_type.buffer.vmid_space.bit.space = ADDR_SPACE_TYPE_GPU_VA;
+ isp4if_split_addr64(ispif->fw_mem_pool->gpu_mc_addr,
+ &buf_type.buffer.buf_base_a_lo,
+ &buf_type.buffer.buf_base_a_hi);
+ buf_type.buffer.buf_size_a = (u32)ispif->fw_mem_pool->mem_size;
+
+ ret = isp4if_send_command(ispif, CMD_ID_SEND_BUFFER,
+ &buf_type, sizeof(buf_type));
+ if (ret) {
+ dev_err(dev, "send fw mem pool 0x%llx(%u) fail %d\n",
+ ispif->fw_mem_pool->gpu_mc_addr, buf_type.buffer.buf_size_a, ret);
+ return ret;
+ }
+
+ dev_dbg(dev, "send fw mem pool 0x%llx(%u) suc\n",
+ ispif->fw_mem_pool->gpu_mc_addr, buf_type.buffer.buf_size_a);
+
+ return 0;
+}
+
+static int isp4sd_set_stream_path(struct isp4_subdev *isp_subdev)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct isp4fw_cmd_set_stream_cfg cmd;
+ struct device *dev = isp_subdev->dev;
+
+ /*
+ * The struct will be shared with ISP FW, use memset() to guarantee padding bits are
+ * zeroed, since this is not guaranteed on all compilers.
+ */
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.stream_cfg.mipi_pipe_path_cfg.isp4fw_sensor_id = SENSOR_ID_ON_MIPI0;
+ cmd.stream_cfg.mipi_pipe_path_cfg.b_enable = true;
+ cmd.stream_cfg.isp_pipe_path_cfg.isp_pipe_id = MIPI0_ISP_PIPELINE_ID;
+
+ cmd.stream_cfg.b_enable_tnr = true;
+ dev_dbg(dev, "isp4fw_sensor_id %d, pipeId 0x%x EnableTnr %u\n",
+ cmd.stream_cfg.mipi_pipe_path_cfg.isp4fw_sensor_id,
+ cmd.stream_cfg.isp_pipe_path_cfg.isp_pipe_id,
+ cmd.stream_cfg.b_enable_tnr);
+
+ return isp4if_send_command(ispif, CMD_ID_SET_STREAM_CONFIG,
+ &cmd, sizeof(cmd));
+}
+
+static int isp4sd_send_meta_buf(struct isp4_subdev *isp_subdev)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct isp4fw_cmd_send_buffer buf_type;
+ struct device *dev = isp_subdev->dev;
+ int i;
+
+ /*
+ * The struct will be shared with ISP FW, use memset() to guarantee padding bits are
+ * zeroed, since this is not guaranteed on all compilers.
+ */
+ memset(&buf_type, 0, sizeof(buf_type));
+ for (i = 0; i < ISP4IF_MAX_STREAM_BUF_COUNT; i++) {
+ struct isp4if_gpu_mem_info *meta_info_buf =
+ isp_subdev->ispif.meta_info_buf[i];
+ int ret;
+
+ if (!meta_info_buf) {
+ dev_err(dev, "fail for no meta info buf(%u)\n", i);
+ return -ENOMEM;
+ }
+ buf_type.buffer_type = BUFFER_TYPE_META_INFO;
+ buf_type.buffer.vmid_space.bit.space = ADDR_SPACE_TYPE_GPU_VA;
+ isp4if_split_addr64(isp_subdev->ispif.meta_info_buf[i]->gpu_mc_addr,
+ &buf_type.buffer.buf_base_a_lo,
+ &buf_type.buffer.buf_base_a_hi);
+ buf_type.buffer.buf_size_a = (u32)isp_subdev->ispif.meta_info_buf[i]->mem_size;
+ ret = isp4if_send_command(ispif, CMD_ID_SEND_BUFFER,
+ &buf_type, sizeof(buf_type));
+ if (ret) {
+ dev_err(dev, "send meta info(%u) fail\n", i);
+ return ret;
+ }
+ }
+
+ dev_dbg(dev, "send meta info suc\n");
+ return 0;
+}
+
+static bool isp4sd_get_str_out_prop(struct isp4_subdev *isp_subdev,
+ struct isp4fw_image_prop *out_prop,
+ struct v4l2_subdev_state *state, u32 pad)
+{
+ struct device *dev = isp_subdev->dev;
+ struct v4l2_mbus_framefmt *format;
+
+ format = v4l2_subdev_state_get_format(state, pad, 0);
+ if (!format) {
+ dev_err(dev, "fail get subdev state format\n");
+ return false;
+ }
+
+ switch (format->code) {
+ case MEDIA_BUS_FMT_YUYV8_1_5X8:
+ out_prop->image_format = IMAGE_FORMAT_NV12;
+ out_prop->width = format->width;
+ out_prop->height = format->height;
+ out_prop->luma_pitch = format->width;
+ out_prop->chroma_pitch = out_prop->width;
+ break;
+ case MEDIA_BUS_FMT_YUYV8_1X16:
+ out_prop->image_format = IMAGE_FORMAT_YUV422INTERLEAVED;
+ out_prop->width = format->width;
+ out_prop->height = format->height;
+ out_prop->luma_pitch = format->width * 2;
+ out_prop->chroma_pitch = 0;
+ break;
+ default:
+ dev_err(dev, "fail for bad image format:0x%x\n",
+ format->code);
+ return false;
+ }
+
+ if (!out_prop->width || !out_prop->height)
+ return false;
+
+ return true;
+}
+
+static int isp4sd_kickoff_stream(struct isp4_subdev *isp_subdev, u32 w, u32 h)
+{
+ struct isp4sd_sensor_info *sensor_info = &isp_subdev->sensor_info;
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+
+ if (sensor_info->status == ISP4SD_START_STATUS_STARTED)
+ return 0;
+
+ if (sensor_info->status == ISP4SD_START_STATUS_START_FAIL) {
+ dev_err(dev, "fail for previous start fail\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "w:%u,h:%u\n", w, h);
+
+ if (isp4sd_send_meta_buf(isp_subdev)) {
+ dev_err(dev, "fail to send meta buf\n");
+ sensor_info->status = ISP4SD_START_STATUS_START_FAIL;
+ return -EINVAL;
+ }
+
+ sensor_info->status = ISP4SD_START_STATUS_OFF;
+
+ if (!sensor_info->start_stream_cmd_sent &&
+ sensor_info->buf_sent_cnt >=
+ ISP4SD_MIN_BUF_CNT_BEF_START_STREAM) {
+ int ret = isp4if_send_command(ispif, CMD_ID_START_STREAM,
+ NULL, 0);
+ if (ret) {
+ dev_err(dev, "fail to start stream\n");
+ return ret;
+ }
+
+ sensor_info->start_stream_cmd_sent = true;
+ } else {
+ dev_dbg(dev,
+ "no send START_STREAM, start_sent %u, buf_sent %u\n",
+ sensor_info->start_stream_cmd_sent,
+ sensor_info->buf_sent_cnt);
+ }
+
+ return 0;
+}
+
+static int isp4sd_setup_output(struct isp4_subdev *isp_subdev,
+ struct v4l2_subdev_state *state, u32 pad)
+{
+ struct isp4sd_output_info *output_info = &isp_subdev->sensor_info.output_info;
+ struct isp4sd_sensor_info *sensor_info = &isp_subdev->sensor_info;
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct isp4fw_cmd_set_out_ch_prop cmd_ch_prop;
+ struct isp4fw_cmd_enable_out_ch cmd_ch_en;
+ struct device *dev = isp_subdev->dev;
+ int ret;
+
+ if (output_info->start_status == ISP4SD_START_STATUS_STARTED)
+ return 0;
+
+ if (output_info->start_status == ISP4SD_START_STATUS_START_FAIL) {
+ dev_err(dev, "fail for previous start fail\n");
+ return -EINVAL;
+ }
+
+ /*
+ * The struct will be shared with ISP FW, use memset() to guarantee padding bits are
+ * zeroed, since this is not guaranteed on all compilers.
+ */
+ memset(&cmd_ch_prop, 0, sizeof(cmd_ch_prop));
+ cmd_ch_prop.ch = ISP_PIPE_OUT_CH_PREVIEW;
+
+ if (!isp4sd_get_str_out_prop(isp_subdev, &cmd_ch_prop.image_prop, state, pad)) {
+ dev_err(dev, "fail to get out prop\n");
+ return -EINVAL;
+ }
+
+ dev_dbg(dev, "channel:%d,fmt %d,w:h=%u:%u,lp:%u,cp%u\n",
+ cmd_ch_prop.ch,
+ cmd_ch_prop.image_prop.image_format,
+ cmd_ch_prop.image_prop.width, cmd_ch_prop.image_prop.height,
+ cmd_ch_prop.image_prop.luma_pitch,
+ cmd_ch_prop.image_prop.chroma_pitch);
+
+ ret = isp4if_send_command(ispif, CMD_ID_SET_OUT_CHAN_PROP,
+ &cmd_ch_prop, sizeof(cmd_ch_prop));
+ if (ret) {
+ output_info->start_status = ISP4SD_START_STATUS_START_FAIL;
+ dev_err(dev, "fail to set out prop\n");
+ return ret;
+ }
+
+ /*
+ * The struct will be shared with ISP FW, use memset() to guarantee padding bits are
+ * zeroed, since this is not guaranteed on all compilers.
+ */
+ memset(&cmd_ch_en, 0, sizeof(cmd_ch_en));
+ cmd_ch_en.ch = ISP_PIPE_OUT_CH_PREVIEW;
+ cmd_ch_en.is_enable = true;
+ ret = isp4if_send_command(ispif, CMD_ID_ENABLE_OUT_CHAN,
+ &cmd_ch_en, sizeof(cmd_ch_en));
+ if (ret) {
+ output_info->start_status = ISP4SD_START_STATUS_START_FAIL;
+ dev_err(dev, "fail to enable channel\n");
+ return ret;
+ }
+
+ dev_dbg(dev, "enable channel %d\n", cmd_ch_en.ch);
+
+ if (!sensor_info->start_stream_cmd_sent) {
+ ret = isp4sd_kickoff_stream(isp_subdev,
+ cmd_ch_prop.image_prop.width,
+ cmd_ch_prop.image_prop.height);
+ if (ret) {
+ dev_err(dev, "kickoff stream fail %d\n", ret);
+ return ret;
+ }
+ /*
+ * sensor_info->start_stream_cmd_sent will be set to true
+ * 1. in isp4sd_kickoff_stream, if app first send buffer then
+ * start stream
+ * 2. in isp_set_stream_buf, if app first start stream, then
+ * send buffer
+ * because ISP FW has the requirement, host needs to send buffer
+ * before send start stream cmd
+ */
+ if (sensor_info->start_stream_cmd_sent) {
+ sensor_info->status = ISP4SD_START_STATUS_STARTED;
+ output_info->start_status = ISP4SD_START_STATUS_STARTED;
+ dev_dbg(dev, "kickoff stream suc,start cmd sent\n");
+ }
+ } else {
+ dev_dbg(dev, "stream running, no need kickoff\n");
+ output_info->start_status = ISP4SD_START_STATUS_STARTED;
+ }
+
+ dev_dbg(dev, "setup output suc\n");
+ return 0;
+}
+
+static int isp4sd_init_stream(struct isp4_subdev *isp_subdev)
+{
+ struct device *dev = isp_subdev->dev;
+ int ret;
+
+ ret = isp4sd_setup_fw_mem_pool(isp_subdev);
+ if (ret) {
+ dev_err(dev, "fail to setup fw mem pool\n");
+ return ret;
+ }
+
+ ret = isp4sd_set_stream_path(isp_subdev);
+ if (ret) {
+ dev_err(dev, "fail to setup stream path\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void isp4sd_reset_stream_info(struct isp4_subdev *isp_subdev,
+ struct v4l2_subdev_state *state, u32 pad)
+{
+ struct isp4sd_sensor_info *sensor_info = &isp_subdev->sensor_info;
+ struct v4l2_mbus_framefmt *format;
+
+ format = v4l2_subdev_state_get_format(state, pad, 0);
+ if (!format) {
+ dev_err(isp_subdev->dev, "fail to get v4l2 format\n");
+ } else {
+ memset(format, 0, sizeof(*format));
+ format->code = MEDIA_BUS_FMT_YUYV8_1_5X8;
+ }
+
+ sensor_info->output_info.start_status = ISP4SD_START_STATUS_OFF;
+}
+
+static void isp4sd_reset_camera_info(struct isp4_subdev *isp_subdev,
+ struct v4l2_subdev_state *state, u32 pad)
+{
+ struct isp4sd_sensor_info *sensor_info = &isp_subdev->sensor_info;
+
+ sensor_info->status = ISP4SD_START_STATUS_OFF;
+ isp4sd_reset_stream_info(isp_subdev, state, pad);
+
+ sensor_info->start_stream_cmd_sent = false;
+}
+
+static int isp4sd_uninit_stream(struct isp4_subdev *isp_subdev,
+ struct v4l2_subdev_state *state, u32 pad)
+{
+ struct isp4sd_output_info *output_info = &isp_subdev->sensor_info.output_info;
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+
+ if (output_info->start_status == ISP4SD_START_STATUS_STARTED) {
+ dev_dbg(dev, "fail for stream is still running\n");
+ return -EINVAL;
+ }
+
+ isp4sd_reset_camera_info(isp_subdev, state, pad);
+ isp4if_clear_cmdq(ispif);
+ return 0;
+}
+
+static void isp4sd_fw_resp_cmd_done(struct isp4_subdev *isp_subdev,
+ enum isp4if_stream_id stream_id,
+ struct isp4fw_resp_cmd_done *para)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct isp4if_cmd_element *ele =
+ isp4if_rm_cmd_from_cmdq(ispif, para->cmd_seq_num, para->cmd_id);
+ struct device *dev = isp_subdev->dev;
+
+ dev_dbg(dev, "stream %d,cmd (0x%08x)(%d),seq %u, ele %p\n",
+ stream_id,
+ para->cmd_id, para->cmd_status, para->cmd_seq_num,
+ ele);
+
+ if (ele) {
+ complete(&ele->cmd_done);
+ if (atomic_dec_and_test(&ele->refcnt))
+ kfree(ele);
+ }
+}
+
+static struct isp4fw_meta_info *isp4sd_get_meta_by_mc(struct isp4_subdev *isp_subdev,
+ u64 mc)
+{
+ for (int i = 0; i < ISP4IF_MAX_STREAM_BUF_COUNT; i++) {
+ struct isp4if_gpu_mem_info *meta_info_buf =
+ isp_subdev->ispif.meta_info_buf[i];
+
+ if (meta_info_buf->gpu_mc_addr == mc)
+ return meta_info_buf->sys_addr;
+ }
+
+ return NULL;
+}
+
+static void isp4sd_send_meta_info(struct isp4_subdev *isp_subdev,
+ u64 meta_info_mc)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct isp4fw_cmd_send_buffer buf_type;
+ struct device *dev = isp_subdev->dev;
+
+ if (isp_subdev->sensor_info.status != ISP4SD_START_STATUS_STARTED) {
+ dev_warn(dev, "not working status %i, meta_info 0x%llx\n",
+ isp_subdev->sensor_info.status, meta_info_mc);
+ return;
+ }
+
+ /*
+ * The struct will be shared with ISP FW, use memset() to guarantee padding bits are
+ * zeroed, since this is not guaranteed on all compilers.
+ */
+ memset(&buf_type, 0, sizeof(buf_type));
+ buf_type.buffer_type = BUFFER_TYPE_META_INFO;
+ buf_type.buffer.vmid_space.bit.space = ADDR_SPACE_TYPE_GPU_VA;
+ isp4if_split_addr64(meta_info_mc,
+ &buf_type.buffer.buf_base_a_lo,
+ &buf_type.buffer.buf_base_a_hi);
+ buf_type.buffer.buf_size_a = ISP4SD_META_BUF_SIZE;
+
+ if (isp4if_send_command(ispif, CMD_ID_SEND_BUFFER,
+ &buf_type, sizeof(buf_type)))
+ dev_err(dev, "fail send meta_info 0x%llx\n",
+ meta_info_mc);
+ else
+ dev_dbg(dev, "resend meta_info 0x%llx\n", meta_info_mc);
+}
+
+static void isp4sd_fw_resp_frame_done(struct isp4_subdev *isp_subdev,
+ enum isp4if_stream_id stream_id,
+ struct isp4fw_resp_param_package *para)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+ struct isp4if_img_buf_node *prev;
+ struct isp4fw_meta_info *meta;
+ u64 mc = 0;
+
+ mc = isp4if_join_addr64(para->package_addr_lo, para->package_addr_hi);
+ meta = isp4sd_get_meta_by_mc(isp_subdev, mc);
+ if (!meta) {
+ dev_err(dev, "fail to get meta from mc %llx\n", mc);
+ return;
+ }
+
+ dev_dbg(dev, "ts:%llu,streamId:%d,poc:%u,preview_en:%u(%i)\n",
+ ktime_get_ns(), stream_id, meta->poc,
+ meta->preview.enabled,
+ meta->preview.status);
+
+ if (meta->preview.enabled &&
+ (meta->preview.status == BUFFER_STATUS_SKIPPED ||
+ meta->preview.status == BUFFER_STATUS_DONE ||
+ meta->preview.status == BUFFER_STATUS_DIRTY)) {
+ prev = isp4if_dequeue_buffer(ispif);
+ if (prev)
+ isp4if_dealloc_buffer_node(prev);
+ else
+ dev_err(dev, "fail null prev buf\n");
+
+ } else if (meta->preview.enabled) {
+ dev_err(dev, "fail bad preview status %u\n",
+ meta->preview.status);
+ }
+
+ if (isp_subdev->sensor_info.status == ISP4SD_START_STATUS_STARTED)
+ isp4sd_send_meta_info(isp_subdev, mc);
+
+ dev_dbg(dev, "stream_id:%d, status:%d\n", stream_id,
+ isp_subdev->sensor_info.status);
+}
+
+static void isp4sd_fw_resp_func(struct isp4_subdev *isp_subdev,
+ enum isp4if_stream_id stream_id)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+ struct isp4fw_resp resp;
+
+ while (true) {
+ if (isp4if_f2h_resp(ispif, stream_id, &resp)) {
+ /* Re-enable the interrupt */
+ isp4_intr_enable(isp_subdev, stream_id, true);
+ /*
+ * Recheck to see if there is a new response.
+ * To ensure that an in-flight interrupt is not lost,
+ * enabling the interrupt must occur _before_ checking
+ * for a new response, hence a memory barrier is needed.
+ * Disable the interrupt again if there was a new response.
+ */
+ mb();
+ if (likely(isp4if_f2h_resp(ispif, stream_id, &resp)))
+ break;
+
+ isp4_intr_enable(isp_subdev, stream_id, false);
+ }
+
+ switch (resp.resp_id) {
+ case RESP_ID_CMD_DONE:
+ isp4sd_fw_resp_cmd_done(isp_subdev, stream_id,
+ &resp.param.cmd_done);
+ break;
+ case RESP_ID_NOTI_FRAME_DONE:
+ isp4sd_fw_resp_frame_done(isp_subdev, stream_id,
+ &resp.param.frame_done);
+ break;
+ default:
+ dev_err(dev, "-><- fail respid (0x%x)\n", resp.resp_id);
+ break;
+ }
+ }
+}
+
+static s32 isp4sd_fw_resp_thread(void *context)
+{
+ struct isp4_subdev_thread_param *para = context;
+ struct isp4_subdev *isp_subdev = para->isp_subdev;
+ struct isp4sd_thread_handler *thread_ctx =
+ &isp_subdev->fw_resp_thread[para->idx];
+ struct device *dev = isp_subdev->dev;
+
+ dev_dbg(dev, "[%u] fw resp thread started\n", para->idx);
+ while (true) {
+ wait_event_interruptible(thread_ctx->waitq, thread_ctx->resp_ready);
+ thread_ctx->resp_ready = false;
+
+ if (kthread_should_stop()) {
+ dev_dbg(dev, "[%u] fw resp thread quit\n", para->idx);
+ break;
+ }
+
+ isp4sd_fw_resp_func(isp_subdev, para->idx);
+ }
+
+ return 0;
+}
+
+static int isp4sd_stop_resp_proc_threads(struct isp4_subdev *isp_subdev)
+{
+ int i;
+
+ for (i = 0; i < ISP4SD_MAX_FW_RESP_STREAM_NUM; i++) {
+ struct isp4sd_thread_handler *thread_ctx =
+ &isp_subdev->fw_resp_thread[i];
+
+ if (thread_ctx->thread) {
+ kthread_stop(thread_ctx->thread);
+ thread_ctx->thread = NULL;
+ }
+ }
+
+ return 0;
+}
+
+static int isp4sd_start_resp_proc_threads(struct isp4_subdev *isp_subdev)
+{
+ struct device *dev = isp_subdev->dev;
+ int i;
+
+ for (i = 0; i < ISP4SD_MAX_FW_RESP_STREAM_NUM; i++) {
+ struct isp4sd_thread_handler *thread_ctx = &isp_subdev->fw_resp_thread[i];
+
+ isp_subdev->isp_resp_para[i].idx = i;
+ isp_subdev->isp_resp_para[i].isp_subdev = isp_subdev;
+ init_waitqueue_head(&thread_ctx->waitq);
+ thread_ctx->resp_ready = false;
+
+ thread_ctx->thread = kthread_run(isp4sd_fw_resp_thread,
+ &isp_subdev->isp_resp_para[i],
+ isp4sd_thread_name[i]);
+ if (IS_ERR(thread_ctx->thread)) {
+ dev_err(dev, "create thread [%d] fail\n", i);
+ thread_ctx->thread = NULL;
+ isp4sd_stop_resp_proc_threads(isp_subdev);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int isp4sd_pwroff_and_deinit(struct isp4_subdev *isp_subdev)
+{
+ struct isp4sd_sensor_info *sensor_info = &isp_subdev->sensor_info;
+ unsigned int perf_state = ISP4SD_PERFORMANCE_STATE_LOW;
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+ int ret;
+
+ if (sensor_info->status == ISP4SD_START_STATUS_STARTED) {
+ dev_err(dev, "fail for stream still running\n");
+ return -EINVAL;
+ }
+
+ sensor_info->status = ISP4SD_START_STATUS_OFF;
+
+ if (isp_subdev->irq_enabled) {
+ for (int i = 0; i < ISP4SD_MAX_FW_RESP_STREAM_NUM; i++)
+ disable_irq(isp_subdev->irq[i]);
+ isp_subdev->irq_enabled = false;
+ }
+
+ isp4sd_stop_resp_proc_threads(isp_subdev);
+ dev_dbg(dev, "isp_subdev stop resp proc streads suc");
+
+ isp4if_stop(ispif);
+
+ ret = dev_pm_genpd_set_performance_state(dev, perf_state);
+ if (ret)
+ dev_err(dev,
+ "fail to set isp_subdev performance state %u,ret %d\n",
+ perf_state, ret);
+
+ /* hold ccpu reset */
+ isp4hw_wreg(isp_subdev->mmio, ISP_SOFT_RESET, 0);
+ isp4hw_wreg(isp_subdev->mmio, ISP_POWER_STATUS, 0);
+ ret = pm_runtime_put_sync(dev);
+ if (ret)
+ dev_err(dev, "power off isp_subdev fail %d\n", ret);
+ else
+ dev_dbg(dev, "power off isp_subdev suc\n");
+
+ ispif->status = ISP4IF_STATUS_PWR_OFF;
+ isp4if_clear_cmdq(ispif);
+ isp4sd_module_enable(isp_subdev, false);
+
+ /*
+ * When opening the camera, isp4sd_module_enable(isp_subdev, true) is called.
+ * Hardware requires at least a 20ms delay between disabling and enabling the module,
+ * so a sleep is added to ensure ISP stability during quick reopen scenarios.
+ */
+ msleep(20);
+
+ return 0;
+}
+
+static int isp4sd_pwron_and_init(struct isp4_subdev *isp_subdev)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+ int ret;
+
+ if (ispif->status == ISP4IF_STATUS_FW_RUNNING) {
+ dev_dbg(dev, "camera already opened, do nothing\n");
+ return 0;
+ }
+
+ isp4sd_module_enable(isp_subdev, true);
+
+ isp_subdev->sensor_info.start_stream_cmd_sent = false;
+ isp_subdev->sensor_info.buf_sent_cnt = 0;
+
+ if (ispif->status < ISP4IF_STATUS_PWR_ON) {
+ unsigned int perf_state = ISP4SD_PERFORMANCE_STATE_HIGH;
+
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret) {
+ dev_err(dev, "fail to power on isp_subdev ret %d\n",
+ ret);
+ goto err_deinit;
+ }
+
+ /* ISPPG ISP Power Status */
+ isp4hw_wreg(isp_subdev->mmio, ISP_POWER_STATUS, 0x7FF);
+ ret = dev_pm_genpd_set_performance_state(dev, perf_state);
+ if (ret) {
+ dev_err(dev,
+ "fail to set performance state %u, ret %d\n",
+ perf_state, ret);
+ goto err_deinit;
+ }
+
+ ispif->status = ISP4IF_STATUS_PWR_ON;
+ }
+
+ isp_subdev->sensor_info.start_stream_cmd_sent = false;
+ isp_subdev->sensor_info.buf_sent_cnt = 0;
+
+ ret = isp4if_start(ispif);
+ if (ret) {
+ dev_err(dev, "fail to start isp_subdev interface\n");
+ goto err_deinit;
+ }
+
+ if (isp4sd_start_resp_proc_threads(isp_subdev)) {
+ dev_err(dev, "isp_start_resp_proc_threads fail");
+ goto err_deinit;
+ }
+ dev_dbg(dev, "create resp threads ok");
+
+ for (int i = 0; i < ISP4SD_MAX_FW_RESP_STREAM_NUM; i++)
+ enable_irq(isp_subdev->irq[i]);
+ isp_subdev->irq_enabled = true;
+
+ return 0;
+err_deinit:
+ isp4sd_pwroff_and_deinit(isp_subdev);
+ return -EINVAL;
+}
+
+static int isp4sd_stop_stream(struct isp4_subdev *isp_subdev,
+ struct v4l2_subdev_state *state, u32 pad)
+{
+ struct isp4sd_output_info *output_info =
+ &isp_subdev->sensor_info.output_info;
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+ int ret = 0;
+
+ guard(mutex)(&isp_subdev->ops_mutex);
+ dev_dbg(dev, "status %i\n", output_info->start_status);
+
+ if (output_info->start_status == ISP4SD_START_STATUS_STARTED) {
+ struct isp4fw_cmd_enable_out_ch cmd_ch_disable;
+
+ /*
+ * The struct will be shared with ISP FW, use memset() to guarantee
+ * padding bits are zeroed, since this is not guaranteed on all compilers.
+ */
+ memset(&cmd_ch_disable, 0, sizeof(cmd_ch_disable));
+ cmd_ch_disable.ch = ISP_PIPE_OUT_CH_PREVIEW;
+ /* `cmd_ch_disable.is_enable` is already false */
+ ret = isp4if_send_command_sync(ispif, CMD_ID_ENABLE_OUT_CHAN,
+ &cmd_ch_disable,
+ sizeof(cmd_ch_disable));
+ if (ret)
+ dev_err(dev, "fail to disable stream\n");
+ else
+ dev_dbg(dev, "wait disable stream suc\n");
+
+ ret = isp4if_send_command_sync(ispif, CMD_ID_STOP_STREAM,
+ NULL, 0);
+ if (ret)
+ dev_err(dev, "fail to stop steam\n");
+ else
+ dev_dbg(dev, "wait stop stream suc\n");
+ }
+
+ isp4if_clear_bufq(ispif);
+
+ output_info->start_status = ISP4SD_START_STATUS_OFF;
+ isp4sd_reset_stream_info(isp_subdev, state, pad);
+
+ isp4sd_uninit_stream(isp_subdev, state, pad);
+
+ /*
+ * Return success to ensure the stop process proceeds,
+ * and disregard any errors since they are not fatal.
+ */
+ return 0;
+}
+
+static int isp4sd_start_stream(struct isp4_subdev *isp_subdev,
+ struct v4l2_subdev_state *state, u32 pad)
+{
+ struct isp4sd_output_info *output_info =
+ &isp_subdev->sensor_info.output_info;
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct device *dev = isp_subdev->dev;
+ int ret;
+
+ guard(mutex)(&isp_subdev->ops_mutex);
+
+ if (ispif->status != ISP4IF_STATUS_FW_RUNNING) {
+ dev_err(dev, "fail, bad fsm %d", ispif->status);
+ return -EINVAL;
+ }
+
+ switch (output_info->start_status) {
+ case ISP4SD_START_STATUS_OFF:
+ break;
+ case ISP4SD_START_STATUS_STARTED:
+ dev_dbg(dev, "stream already started, do nothing\n");
+ return 0;
+ case ISP4SD_START_STATUS_START_FAIL:
+ dev_err(dev, "stream previously failed to start\n");
+ return -EINVAL;
+ }
+
+ ret = isp4sd_init_stream(isp_subdev);
+ if (ret) {
+ dev_err(dev, "fail to init isp_subdev stream\n");
+ goto err_stop_stream;
+ }
+
+ ret = isp4sd_setup_output(isp_subdev, state, pad);
+ if (ret) {
+ dev_err(dev, "fail to setup output\n");
+ goto err_stop_stream;
+ }
+
+ return 0;
+
+err_stop_stream:
+ isp4sd_stop_stream(isp_subdev, state, pad);
+ return ret;
+}
+
+static int isp4sd_set_power(struct v4l2_subdev *sd, int on)
+{
+ struct isp4_subdev *isp_subdev = to_isp4_subdev(sd);
+
+ guard(mutex)(&isp_subdev->ops_mutex);
+ if (on)
+ return isp4sd_pwron_and_init(isp_subdev);
+ else
+ return isp4sd_pwroff_and_deinit(isp_subdev);
+}
+
+static const struct v4l2_subdev_core_ops isp4sd_core_ops = {
+ .s_power = isp4sd_set_power,
+};
+
+static const struct v4l2_subdev_video_ops isp4sd_video_ops = {
+ .s_stream = v4l2_subdev_s_stream_helper,
+};
+
+static int isp4sd_set_pad_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ struct isp4sd_output_info *steam_info =
+ &(to_isp4_subdev(sd)->sensor_info.output_info);
+ struct v4l2_mbus_framefmt *format;
+
+ format = v4l2_subdev_state_get_format(sd_state, fmt->pad);
+
+ if (!format) {
+ dev_err(sd->dev, "fail to get state format\n");
+ return -EINVAL;
+ }
+
+ *format = fmt->format;
+ switch (format->code) {
+ case MEDIA_BUS_FMT_YUYV8_1_5X8:
+ steam_info->image_size = format->width * format->height * 3 / 2;
+ break;
+ case MEDIA_BUS_FMT_YUYV8_1X16:
+ steam_info->image_size = format->width * format->height * 2;
+ break;
+ default:
+ steam_info->image_size = 0;
+ break;
+ }
+ if (!steam_info->image_size) {
+ dev_err(sd->dev,
+ "fail set pad format,code 0x%x,width %u, height %u\n",
+ format->code, format->width, format->height);
+ return -EINVAL;
+ }
+ dev_dbg(sd->dev,
+ "set pad format suc, code:%x w:%u h:%u size:%u\n", format->code,
+ format->width, format->height, steam_info->image_size);
+
+ return 0;
+}
+
+static int isp4sd_enable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct isp4_subdev *isp_subdev = to_isp4_subdev(sd);
+
+ return isp4sd_start_stream(isp_subdev, state, pad);
+}
+
+static int isp4sd_disable_streams(struct v4l2_subdev *sd,
+ struct v4l2_subdev_state *state, u32 pad,
+ u64 streams_mask)
+{
+ struct isp4_subdev *isp_subdev = to_isp4_subdev(sd);
+
+ return isp4sd_stop_stream(isp_subdev, state, pad);
+}
+
+static const struct v4l2_subdev_pad_ops isp4sd_pad_ops = {
+ .get_fmt = v4l2_subdev_get_fmt,
+ .set_fmt = isp4sd_set_pad_format,
+ .enable_streams = isp4sd_enable_streams,
+ .disable_streams = isp4sd_disable_streams,
+};
+
+static const struct v4l2_subdev_ops isp4sd_subdev_ops = {
+ .core = &isp4sd_core_ops,
+ .video = &isp4sd_video_ops,
+ .pad = &isp4sd_pad_ops,
+};
+
+static int isp4sd_sdev_link_validate(struct media_link *link)
+{
+ return 0;
+}
+
+static const struct media_entity_operations isp4sd_sdev_ent_ops = {
+ .link_validate = isp4sd_sdev_link_validate,
+};
+
+int isp4sd_init(struct isp4_subdev *isp_subdev, struct v4l2_device *v4l2_dev,
+ int irq[ISP4SD_MAX_FW_RESP_STREAM_NUM])
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+ struct isp4sd_sensor_info *sensor_info;
+ struct device *dev = v4l2_dev->dev;
+ int ret;
+
+ isp_subdev->dev = dev;
+ v4l2_subdev_init(&isp_subdev->sdev, &isp4sd_subdev_ops);
+ isp_subdev->sdev.owner = THIS_MODULE;
+ isp_subdev->sdev.dev = dev;
+ snprintf(isp_subdev->sdev.name, sizeof(isp_subdev->sdev.name), "%s",
+ dev_name(dev));
+
+ isp_subdev->sdev.entity.name = isp4sd_entity_name;
+ isp_subdev->sdev.entity.function = MEDIA_ENT_F_PROC_VIDEO_ISP;
+ isp_subdev->sdev.entity.ops = &isp4sd_sdev_ent_ops;
+ isp_subdev->sdev_pad.flags = MEDIA_PAD_FL_SOURCE;
+ ret = media_entity_pads_init(&isp_subdev->sdev.entity, 1,
+ &isp_subdev->sdev_pad);
+ if (ret) {
+ dev_err(dev, "fail to init isp4 subdev entity pad %d\n", ret);
+ return ret;
+ }
+ ret = v4l2_subdev_init_finalize(&isp_subdev->sdev);
+ if (ret < 0) {
+ dev_err(dev, "fail to init finalize isp4 subdev %d\n",
+ ret);
+ return ret;
+ }
+ ret = v4l2_device_register_subdev(v4l2_dev, &isp_subdev->sdev);
+ if (ret) {
+ dev_err(dev, "fail to register isp4 subdev to V4L2 device %d\n", ret);
+ goto err_media_clean_up;
+ }
+
+ sensor_info = &isp_subdev->sensor_info;
+
+ isp4if_init(ispif, dev, isp_subdev->mmio);
+
+ mutex_init(&isp_subdev->ops_mutex);
+ sensor_info->start_stream_cmd_sent = false;
+ sensor_info->status = ISP4SD_START_STATUS_OFF;
+
+ /* create ISP enable gpio control */
+ isp_subdev->enable_gpio = devm_gpiod_get(isp_subdev->dev,
+ "enable_isp",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(isp_subdev->enable_gpio)) {
+ ret = PTR_ERR(isp_subdev->enable_gpio);
+ dev_err(dev, "fail to get gpiod %d\n", ret);
+ goto err_subdev_unreg;
+ }
+
+ for (int i = 0; i < ISP4SD_MAX_FW_RESP_STREAM_NUM; i++)
+ isp_subdev->irq[i] = irq[i];
+
+ isp_subdev->host2fw_seq_num = 1;
+ ispif->status = ISP4IF_STATUS_PWR_OFF;
+
+ return 0;
+
+err_subdev_unreg:
+ v4l2_device_unregister_subdev(&isp_subdev->sdev);
+err_media_clean_up:
+ v4l2_subdev_cleanup(&isp_subdev->sdev);
+ media_entity_cleanup(&isp_subdev->sdev.entity);
+ return ret;
+}
+
+void isp4sd_deinit(struct isp4_subdev *isp_subdev)
+{
+ struct isp4_interface *ispif = &isp_subdev->ispif;
+
+ v4l2_device_unregister_subdev(&isp_subdev->sdev);
+ media_entity_cleanup(&isp_subdev->sdev.entity);
+ isp4if_deinit(ispif);
+ isp4sd_module_enable(isp_subdev, false);
+
+ ispif->status = ISP4IF_STATUS_PWR_OFF;
+}
diff --git a/drivers/media/platform/amd/isp4/isp4_subdev.h b/drivers/media/platform/amd/isp4/isp4_subdev.h
new file mode 100644
index 000000000000..c6c6a20d2957
--- /dev/null
+++ b/drivers/media/platform/amd/isp4/isp4_subdev.h
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2025 Advanced Micro Devices, Inc.
+ */
+
+#ifndef _ISP4_SUBDEV_H_
+#define _ISP4_SUBDEV_H_
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <media/v4l2-device.h>
+
+#include "isp4_fw_cmd_resp.h"
+#include "isp4_hw_reg.h"
+#include "isp4_interface.h"
+
+/*
+ * one is for none sesnor specefic response which is not used now
+ * another is for sensor specific response
+ */
+#define ISP4SD_MAX_FW_RESP_STREAM_NUM 2
+
+/*
+ * cmd used to register frame done callback, parameter is
+ * struct isp4sd_register_framedone_cb_param *
+ * when a image buffer is filled by ISP, ISP will call the registered callback.
+ * callback func prototype is isp4sd_framedone_cb, cb_ctx can be anything
+ * provided by caller which will be provided back as the first parameter of the
+ * callback function.
+ * both cb_func and cb_ctx are provide by caller, set cb_func to NULL to
+ * unregister the callback
+ */
+
+/* used to indicate the ISP status */
+enum isp4sd_status {
+ ISP4SD_STATUS_PWR_OFF,
+ ISP4SD_STATUS_PWR_ON,
+ ISP4SD_STATUS_FW_RUNNING,
+ ISP4SD_STATUS_MAX
+};
+
+/* used to indicate the status of sensor, output stream */
+enum isp4sd_start_status {
+ ISP4SD_START_STATUS_OFF,
+ ISP4SD_START_STATUS_STARTED,
+ ISP4SD_START_STATUS_START_FAIL,
+};
+
+struct isp4sd_img_buf_node {
+ struct list_head node;
+ struct isp4if_img_buf_info buf_info;
+};
+
+/* this is isp output after processing bayer raw input from sensor */
+struct isp4sd_output_info {
+ enum isp4sd_start_status start_status;
+ u32 image_size;
+};
+
+/*
+ * This struct represents the sensor info which is input or source of ISP,
+ * status is the sensor status
+ * output_info is the isp output info after ISP processing the sensor input,
+ * start_stream_cmd_sent mean if CMD_ID_START_STREAM has sent to fw.
+ * buf_sent_cnt is buffer count app has sent to receive the images
+ */
+struct isp4sd_sensor_info {
+ struct isp4sd_output_info output_info;
+ enum isp4sd_start_status status;
+ bool start_stream_cmd_sent;
+ u32 buf_sent_cnt;
+};
+
+/*
+ * Thread created by driver to receive fw response
+ * thread will be wakeup by fw to driver response interrupt
+ */
+struct isp4sd_thread_handler {
+ struct task_struct *thread;
+ wait_queue_head_t waitq;
+ bool resp_ready;
+};
+
+struct isp4_subdev_thread_param {
+ u32 idx;
+ struct isp4_subdev *isp_subdev;
+};
+
+struct isp4_subdev {
+ struct v4l2_subdev sdev;
+ struct isp4_interface ispif;
+
+ struct media_pad sdev_pad;
+
+ enum isp4sd_status isp_status;
+ struct mutex ops_mutex; /* ops_mutex */
+
+ /* Used to store fw cmds sent to FW whose response driver needs to wait for */
+ struct isp4sd_thread_handler fw_resp_thread[ISP4SD_MAX_FW_RESP_STREAM_NUM];
+
+ u32 host2fw_seq_num;
+
+ struct isp4sd_sensor_info sensor_info;
+
+ /* gpio descriptor */
+ struct gpio_desc *enable_gpio;
+ struct device *dev;
+ void __iomem *mmio;
+ struct isp4_subdev_thread_param isp_resp_para[ISP4SD_MAX_FW_RESP_STREAM_NUM];
+ int irq[ISP4SD_MAX_FW_RESP_STREAM_NUM];
+ bool irq_enabled;
+ spinlock_t irq_lock;
+};
+
+int isp4sd_init(struct isp4_subdev *isp_subdev, struct v4l2_device *v4l2_dev,
+ int irq[ISP4SD_MAX_FW_RESP_STREAM_NUM]);
+void isp4sd_deinit(struct isp4_subdev *isp_subdev);
+
+#endif /* _ISP4_SUBDEV_H_ */
--
2.34.1© 2016 - 2025 Red Hat, Inc.