media: staging: media: starfive: camss: Add capture driver (e080f339) · Commits · git / linux-net

drivers/staging/media/starfive/camss/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -5,6 +5,7 @@

		starfive-camss-objs += \
		stf-camss.o \
		stf-capture.o \
		stf-isp.o \
		stf-isp-hw-ops.o \
		stf-video.o

drivers/staging/media/starfive/camss/stf-camss.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		#include <media/v4l2-device.h>

		#include "stf-isp.h"
		#include "stf-capture.h"

		enum stf_port_num {
		STF_PORT_DVP = 0,
		@@ -52,6 +53,7 @@ struct stfcamss {
		struct media_pipeline pipe;
		struct device *dev;
		struct stf_isp_dev isp_dev;
		struct stf_capture captures[STF_CAPTURE_NUM];
		struct v4l2_async_notifier notifier;
		void __iomem *syscon_base;
		void __iomem *isp_base;

drivers/staging/media/starfive/camss/stf-capture.c

0 → 100644

+603 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/*
		* stf_capture.c
		*
		* StarFive Camera Subsystem - capture device
		*
		* Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
		*/

		#include "stf-camss.h"

		static const char * const stf_cap_names[] = {
		"capture_raw",
		"capture_yuv",
		};

		static const struct stfcamss_format_info stf_wr_fmts[] = {
		{
		.code = MEDIA_BUS_FMT_SRGGB10_1X10,
		.pixelformat = V4L2_PIX_FMT_SRGGB10,
		.planes = 1,
		.vsub = { 1 },
		.bpp = 10,
		},
		{
		.code = MEDIA_BUS_FMT_SGRBG10_1X10,
		.pixelformat = V4L2_PIX_FMT_SGRBG10,
		.planes = 1,
		.vsub = { 1 },
		.bpp = 10,
		},
		{
		.code = MEDIA_BUS_FMT_SGBRG10_1X10,
		.pixelformat = V4L2_PIX_FMT_SGBRG10,
		.planes = 1,
		.vsub = { 1 },
		.bpp = 10,
		},
		{
		.code = MEDIA_BUS_FMT_SBGGR10_1X10,
		.pixelformat = V4L2_PIX_FMT_SBGGR10,
		.planes = 1,
		.vsub = { 1 },
		.bpp = 10,
		},
		};

		static const struct stfcamss_format_info stf_isp_fmts[] = {
		{
		.code = MEDIA_BUS_FMT_YUYV8_1_5X8,
		.pixelformat = V4L2_PIX_FMT_NV12,
		.planes = 2,
		.vsub = { 1, 2 },
		.bpp = 8,
		},
		};

		static inline struct stf_capture to_stf_capture(struct stfcamss_video video)
		{
		return container_of(video, struct stf_capture, video);
		}

		static void stf_set_raw_addr(struct stfcamss *stfcamss, dma_addr_t addr)
		{
		stf_syscon_reg_write(stfcamss, VIN_START_ADDR_O, (long)addr);
		stf_syscon_reg_write(stfcamss, VIN_START_ADDR_N, (long)addr);
		}

		static void stf_set_yuv_addr(struct stfcamss *stfcamss,
		dma_addr_t y_addr, dma_addr_t uv_addr)
		{
		stf_isp_reg_write(stfcamss, ISP_REG_Y_PLANE_START_ADDR, y_addr);
		stf_isp_reg_write(stfcamss, ISP_REG_UV_PLANE_START_ADDR, uv_addr);
		}

		static void stf_init_addrs(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stf_v_buf *output = &cap->buffers;
		dma_addr_t addr0, addr1;

		output->active_buf = 0;

		if (!output->buf[0])
		return;

		addr0 = output->buf[0]->addr[0];
		addr1 = output->buf[0]->addr[1];

		if (cap->type == STF_CAPTURE_RAW)
		stf_set_raw_addr(video->stfcamss, addr0);
		else if (cap->type == STF_CAPTURE_YUV)
		stf_set_yuv_addr(video->stfcamss, addr0, addr1);
		}

		static struct stfcamss_buffer stf_buf_get_pending(struct stf_v_buf 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 stf_cap_s_cfg(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stf_v_buf *output = &cap->buffers;
		unsigned long flags;

		spin_lock_irqsave(&output->lock, flags);

		output->state = STF_OUTPUT_IDLE;
		output->buf[0] = stf_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 = STF_OUTPUT_SINGLE;

		output->sequence = 0;
		stf_init_addrs(video);

		spin_unlock_irqrestore(&output->lock, flags);
		}

		static int stf_cap_s_cleanup(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stf_v_buf *output = &cap->buffers;
		unsigned long flags;

		spin_lock_irqsave(&output->lock, flags);

		output->state = STF_OUTPUT_OFF;

		spin_unlock_irqrestore(&output->lock, flags);

		return 0;
		}

		static void stf_wr_data_en(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stfcamss *stfcamss = cap->video.stfcamss;

		stf_syscon_reg_set_bit(stfcamss, VIN_CHANNEL_SEL_EN, U0_VIN_AXIWR0_EN);
		}

		static void stf_wr_irq_enable(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stfcamss *stfcamss = cap->video.stfcamss;

		stf_syscon_reg_clear_bit(stfcamss, VIN_INRT_PIX_CFG, U0_VIN_INTR_M);
		}

		static void stf_wr_irq_disable(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stfcamss *stfcamss = cap->video.stfcamss;

		stf_syscon_reg_set_bit(stfcamss, VIN_INRT_PIX_CFG, U0_VIN_INTR_CLEAN);
		stf_syscon_reg_clear_bit(stfcamss, VIN_INRT_PIX_CFG, U0_VIN_INTR_CLEAN);
		stf_syscon_reg_set_bit(stfcamss, VIN_INRT_PIX_CFG, U0_VIN_INTR_M);
		}

		static void stf_channel_set(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stfcamss *stfcamss = cap->video.stfcamss;
		u32 val;

		if (cap->type == STF_CAPTURE_RAW) {
		val = stf_syscon_reg_read(stfcamss, VIN_CHANNEL_SEL_EN);
		val &= ~U0_VIN_CHANNEL_SEL_MASK;
		val \|= CHANNEL(0);
		stf_syscon_reg_write(stfcamss, VIN_CHANNEL_SEL_EN, val);

		val = stf_syscon_reg_read(stfcamss, VIN_INRT_PIX_CFG);
		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, VIN_INRT_PIX_CFG, val);
		} else if (cap->type == STF_CAPTURE_YUV) {
		val = stf_syscon_reg_read(stfcamss, VIN_CFG_REG);
		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, VIN_CFG_REG, val);
		}
		}

		static void stf_capture_start(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);

		stf_channel_set(video);
		if (cap->type == STF_CAPTURE_RAW) {
		stf_wr_irq_enable(video);
		stf_wr_data_en(video);
		}

		stf_cap_s_cfg(video);
		}

		static void stf_capture_stop(struct stfcamss_video *video)
		{
		struct stf_capture *cap = to_stf_capture(video);

		if (cap->type == STF_CAPTURE_RAW)
		stf_wr_irq_disable(video);

		stf_cap_s_cleanup(video);
		}

		static void stf_capture_init(struct stfcamss stfcamss, struct stf_capture cap)
		{
		cap->buffers.state = STF_OUTPUT_OFF;
		cap->buffers.buf[0] = NULL;
		cap->buffers.buf[1] = NULL;
		cap->buffers.active_buf = 0;
		atomic_set(&cap->buffers.frame_skip, 4);
		INIT_LIST_HEAD(&cap->buffers.pending_bufs);
		INIT_LIST_HEAD(&cap->buffers.ready_bufs);
		spin_lock_init(&cap->buffers.lock);

		cap->video.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
		cap->video.stfcamss = stfcamss;
		cap->video.bpl_alignment = 16 * 8;

		if (cap->type == STF_CAPTURE_RAW) {
		cap->video.formats = stf_wr_fmts;
		cap->video.nformats = ARRAY_SIZE(stf_wr_fmts);
		cap->video.bpl_alignment = 8;
		} else if (cap->type == STF_CAPTURE_YUV) {
		cap->video.formats = stf_isp_fmts;
		cap->video.nformats = ARRAY_SIZE(stf_isp_fmts);
		cap->video.bpl_alignment = 1;
		}
		}

		static void stf_buf_add_ready(struct stf_v_buf *output,
		struct stfcamss_buffer *buffer)
		{
		INIT_LIST_HEAD(&buffer->queue);
		list_add_tail(&buffer->queue, &output->ready_bufs);
		}

		static struct stfcamss_buffer stf_buf_get_ready(struct stf_v_buf 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 stf_buf_add_pending(struct stf_v_buf *output,
		struct stfcamss_buffer *buffer)
		{
		INIT_LIST_HEAD(&buffer->queue);
		list_add_tail(&buffer->queue, &output->pending_bufs);
		}

		static void stf_buf_update_on_last(struct stf_v_buf *output)
		{
		switch (output->state) {
		case STF_OUTPUT_CONTINUOUS:
		output->state = STF_OUTPUT_SINGLE;
		output->active_buf = !output->active_buf;
		break;
		case STF_OUTPUT_SINGLE:
		output->state = STF_OUTPUT_STOPPING;
		break;
		default:
		break;
		}
		}

		static void stf_buf_update_on_next(struct stf_v_buf *output)
		{
		switch (output->state) {
		case STF_OUTPUT_CONTINUOUS:
		output->active_buf = !output->active_buf;
		break;
		case STF_OUTPUT_SINGLE:
		default:
		break;
		}
		}

		static void stf_buf_update_on_new(struct stfcamss_video *video,
		struct stfcamss_buffer *new_buf)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stf_v_buf *output = &cap->buffers;

		switch (output->state) {
		case STF_OUTPUT_SINGLE:
		stf_buf_add_pending(output, new_buf);
		break;
		case STF_OUTPUT_IDLE:
		if (!output->buf[0]) {
		output->buf[0] = new_buf;
		stf_init_addrs(video);
		output->state = STF_OUTPUT_SINGLE;
		} else {
		stf_buf_add_pending(output, new_buf);
		}
		break;
		case STF_OUTPUT_STOPPING:
		if (output->last_buffer) {
		output->buf[output->active_buf] = output->last_buffer;
		output->last_buffer = NULL;
		}

		output->state = STF_OUTPUT_SINGLE;
		stf_buf_add_pending(output, new_buf);
		break;
		case STF_OUTPUT_CONTINUOUS:
		default:
		stf_buf_add_pending(output, new_buf);
		break;
		}
		}

		static void stf_buf_flush(struct stf_v_buf *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 stf_buf_done(struct stf_v_buf *output)
		{
		struct stfcamss_buffer *ready_buf;
		u64 ts = ktime_get_ns();
		unsigned long flags;

		if (output->state == STF_OUTPUT_OFF \|\|
		output->state == STF_OUTPUT_RESERVED)
		return;

		spin_lock_irqsave(&output->lock, flags);

		while ((ready_buf = stf_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(&output->lock, flags);
		}

		static void stf_change_buffer(struct stf_v_buf *output)
		{
		struct stf_capture *cap = container_of(output, struct stf_capture,
		buffers);
		struct stfcamss *stfcamss = cap->video.stfcamss;
		struct stfcamss_buffer *ready_buf;
		dma_addr_t *new_addr;
		unsigned long flags;
		u32 active_index;

		if (output->state == STF_OUTPUT_OFF \|\|
		output->state == STF_OUTPUT_STOPPING \|\|
		output->state == STF_OUTPUT_RESERVED \|\|
		output->state == STF_OUTPUT_IDLE)
		return;

		spin_lock_irqsave(&output->lock, flags);

		active_index = output->active_buf;

		ready_buf = output->buf[active_index];
		if (!ready_buf) {
		dev_dbg(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_dbg(stfcamss->dev,
		"missing ready buf2 %d %d.\n",
		active_index, output->state);
		goto out_unlock;
		}
		}

		/* Get next buffer */
		output->buf[active_index] = stf_buf_get_pending(output);
		if (!output->buf[active_index]) {
		new_addr = ready_buf->addr;
		stf_buf_update_on_last(output);
		} else {
		new_addr = output->buf[active_index]->addr;
		stf_buf_update_on_next(output);
		}

		if (output->state == STF_OUTPUT_STOPPING) {
		output->last_buffer = ready_buf;
		} else {
		if (cap->type == STF_CAPTURE_RAW)
		stf_set_raw_addr(stfcamss, new_addr[0]);
		else if (cap->type == STF_CAPTURE_YUV)
		stf_set_yuv_addr(stfcamss, new_addr[0], new_addr[1]);

		stf_buf_add_ready(output, ready_buf);
		}

		out_unlock:
		spin_unlock_irqrestore(&output->lock, flags);
		}

		irqreturn_t stf_wr_irq_handler(int irq, void *priv)
		{
		struct stfcamss *stfcamss = priv;
		struct stf_capture *cap = &stfcamss->captures[STF_CAPTURE_RAW];

		if (atomic_dec_if_positive(&cap->buffers.frame_skip) < 0) {
		stf_change_buffer(&cap->buffers);
		stf_buf_done(&cap->buffers);
		}

		stf_syscon_reg_set_bit(stfcamss, VIN_INRT_PIX_CFG, U0_VIN_INTR_CLEAN);
		stf_syscon_reg_clear_bit(stfcamss, VIN_INRT_PIX_CFG, U0_VIN_INTR_CLEAN);

		return IRQ_HANDLED;
		}

		irqreturn_t stf_isp_irq_handler(int irq, void *priv)
		{
		struct stfcamss *stfcamss = priv;
		struct stf_capture *cap = &stfcamss->captures[STF_CAPTURE_YUV];
		u32 status;

		status = stf_isp_reg_read(stfcamss, ISP_REG_ISP_CTRL_0);
		if (status & ISPC_ISP) {
		if (status & ISPC_ENUO)
		stf_buf_done(&cap->buffers);

		stf_isp_reg_write(stfcamss, ISP_REG_ISP_CTRL_0,
		(status & ~ISPC_INT_ALL_MASK) \|
		ISPC_ISP \| ISPC_CSI \| ISPC_SC);
		}

		return IRQ_HANDLED;
		}

		irqreturn_t stf_line_irq_handler(int irq, void *priv)
		{
		struct stfcamss *stfcamss = priv;
		struct stf_capture *cap = &stfcamss->captures[STF_CAPTURE_YUV];
		u32 status;

		status = stf_isp_reg_read(stfcamss, ISP_REG_ISP_CTRL_0);
		if (status & ISPC_LINE) {
		if (atomic_dec_if_positive(&cap->buffers.frame_skip) < 0) {
		if ((status & ISPC_ENUO))
		stf_change_buffer(&cap->buffers);
		}

		stf_isp_reg_set_bit(stfcamss, ISP_REG_CSIINTS,
		CSI_INTS_MASK, CSI_INTS(0x3));
		stf_isp_reg_set_bit(stfcamss, ISP_REG_IESHD,
		SHAD_UP_M \| SHAD_UP_EN, 0x3);

		stf_isp_reg_write(stfcamss, ISP_REG_ISP_CTRL_0,
		(status & ~ISPC_INT_ALL_MASK) \| ISPC_LINE);
		}

		return IRQ_HANDLED;
		}

		static int stf_queue_buffer(struct stfcamss_video *video,
		struct stfcamss_buffer *buf)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stf_v_buf *v_bufs = &cap->buffers;
		unsigned long flags;

		spin_lock_irqsave(&v_bufs->lock, flags);
		stf_buf_update_on_new(video, buf);
		spin_unlock_irqrestore(&v_bufs->lock, flags);

		return 0;
		}

		static int stf_flush_buffers(struct stfcamss_video *video,
		enum vb2_buffer_state state)
		{
		struct stf_capture *cap = to_stf_capture(video);
		struct stf_v_buf *v_bufs = &cap->buffers;
		unsigned long flags;
		unsigned int i;

		spin_lock_irqsave(&v_bufs->lock, flags);

		stf_buf_flush(v_bufs, state);

		for (i = 0; i < ARRAY_SIZE(v_bufs->buf); i++) {
		if (v_bufs->buf[i])
		vb2_buffer_done(&v_bufs->buf[i]->vb.vb2_buf, state);

		v_bufs->buf[i] = NULL;
		}

		if (v_bufs->last_buffer) {
		vb2_buffer_done(&v_bufs->last_buffer->vb.vb2_buf, state);
		v_bufs->last_buffer = NULL;
		}

		spin_unlock_irqrestore(&v_bufs->lock, flags);
		return 0;
		}

		static const struct stfcamss_video_ops stf_capture_ops = {
		.queue_buffer = stf_queue_buffer,
		.flush_buffers = stf_flush_buffers,
		.start_streaming = stf_capture_start,
		.stop_streaming = stf_capture_stop,
		};

		static void stf_capture_unregister_one(struct stf_capture *cap)
		{
		if (!video_is_registered(&cap->video.vdev))
		return;

		media_entity_cleanup(&cap->video.vdev.entity);
		vb2_video_unregister_device(&cap->video.vdev);
		}

		void stf_capture_unregister(struct stfcamss *stfcamss)
		{
		struct stf_capture *cap_raw = &stfcamss->captures[STF_CAPTURE_RAW];
		struct stf_capture *cap_yuv = &stfcamss->captures[STF_CAPTURE_YUV];

		stf_capture_unregister_one(cap_raw);
		stf_capture_unregister_one(cap_yuv);
		}

		int stf_capture_register(struct stfcamss *stfcamss,
		struct v4l2_device *v4l2_dev)
		{
		unsigned int i;
		int ret;

		for (i = 0; i < ARRAY_SIZE(stfcamss->captures); i++) {
		struct stf_capture *capture = &stfcamss->captures[i];

		capture->type = i;
		capture->video.ops = &stf_capture_ops;
		stf_capture_init(stfcamss, capture);

		ret = stf_video_register(&capture->video, v4l2_dev,
		stf_cap_names[i]);
		if (ret < 0) {
		dev_err(stfcamss->dev,
		"Failed to register video node: %d\n", ret);
		stf_capture_unregister(stfcamss);
		return ret;
		}
		}

		return 0;
		}

drivers/staging/media/starfive/camss/stf-capture.h

0 → 100644

+86 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 */
		/*
		* stf_capture.h
		*
		* Starfive Camera Subsystem driver
		*
		* Copyright (C) 2021-2023 StarFive Technology Co., Ltd.
		*/

		#ifndef STF_CAPTURE_H
		#define STF_CAPTURE_H

		#include "stf-video.h"

		#define VIN_CHANNEL_SEL_EN 0x14
		#define VIN_START_ADDR_N 0x18
		#define VIN_INRT_PIX_CFG 0x1c
		#define VIN_START_ADDR_O 0x20
		#define VIN_CFG_REG 0x24

		#define U0_VIN_CNFG_AXI_DVP_EN BIT(2)

		#define U0_VIN_CHANNEL_SEL_MASK GENMASK(3, 0)
		#define U0_VIN_AXIWR0_EN BIT(4)
		#define CHANNEL(x) ((x) << 0)

		#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)

		#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)

		enum stf_v_state {
		STF_OUTPUT_OFF,
		STF_OUTPUT_RESERVED,
		STF_OUTPUT_SINGLE,
		STF_OUTPUT_CONTINUOUS,
		STF_OUTPUT_IDLE,
		STF_OUTPUT_STOPPING
		};

		struct stf_v_buf {
		int active_buf;
		struct stfcamss_buffer *buf[2];
		struct stfcamss_buffer *last_buffer;
		struct list_head pending_bufs;
		struct list_head ready_bufs;
		enum stf_v_state state;
		unsigned int sequence;
		/* protects the above member variables */
		spinlock_t lock;
		atomic_t frame_skip;
		};

		struct stf_capture {
		struct stfcamss_video video;
		struct stf_v_buf buffers;
		enum stf_capture_type type;
		};

		irqreturn_t stf_wr_irq_handler(int irq, void *priv);
		irqreturn_t stf_isp_irq_handler(int irq, void *priv);
		irqreturn_t stf_line_irq_handler(int irq, void *priv);
		int stf_capture_register(struct stfcamss *stfcamss,
		struct v4l2_device *v4l2_dev);
		void stf_capture_unregister(struct stfcamss *stfcamss);

		#endif