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linuxdebug/drivers/media/platform/nxp/dw100/dw100.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0+
/*
* DW100 Hardware dewarper
*
* Copyright 2022 NXP
* Author: Xavier Roumegue (xavier.roumegue@oss.nxp.com)
*
*/
#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>
#include <media/videobuf2-dma-contig.h>
#include <uapi/linux/dw100.h>
#include "dw100_regs.h"
#define DRV_NAME "dw100"
#define DW100_MIN_W 176u
#define DW100_MIN_H 144u
#define DW100_MAX_W 4096u
#define DW100_MAX_H 3072u
#define DW100_ALIGN_W 3
#define DW100_ALIGN_H 3
#define DW100_BLOCK_SIZE 16
#define DW100_DEF_W 640u
#define DW100_DEF_H 480u
#define DW100_DEF_LUT_W (DIV_ROUND_UP(DW100_DEF_W, DW100_BLOCK_SIZE) + 1)
#define DW100_DEF_LUT_H (DIV_ROUND_UP(DW100_DEF_H, DW100_BLOCK_SIZE) + 1)
/*
* 16 controls have been reserved for this driver for future extension, but
* let's limit the related driver allocation to the effective number of controls
* in use.
*/
#define DW100_MAX_CTRLS 1
#define DW100_CTRL_DEWARPING_MAP 0
enum {
DW100_QUEUE_SRC = 0,
DW100_QUEUE_DST = 1,
};
enum {
DW100_FMT_CAPTURE = BIT(0),
DW100_FMT_OUTPUT = BIT(1),
};
struct dw100_device {
struct platform_device *pdev;
struct v4l2_m2m_dev *m2m_dev;
struct v4l2_device v4l2_dev;
struct video_device vfd;
struct media_device mdev;
/* Video device lock */
struct mutex vfd_mutex;
void __iomem *mmio;
struct clk_bulk_data *clks;
int num_clks;
struct dentry *debugfs_root;
};
struct dw100_q_data {
struct v4l2_pix_format_mplane pix_fmt;
unsigned int sequence;
const struct dw100_fmt *fmt;
struct v4l2_rect crop;
};
struct dw100_ctx {
struct v4l2_fh fh;
struct dw100_device *dw_dev;
struct v4l2_ctrl_handler hdl;
struct v4l2_ctrl *ctrls[DW100_MAX_CTRLS];
/* per context m2m queue lock */
struct mutex vq_mutex;
/* Look Up Table for pixel remapping */
unsigned int *map;
dma_addr_t map_dma;
size_t map_size;
unsigned int map_width;
unsigned int map_height;
bool user_map_is_set;
/* Source and destination queue data */
struct dw100_q_data q_data[2];
};
static const struct v4l2_frmsize_stepwise dw100_frmsize_stepwise = {
.min_width = DW100_MIN_W,
.min_height = DW100_MIN_H,
.max_width = DW100_MAX_W,
.max_height = DW100_MAX_H,
.step_width = 1UL << DW100_ALIGN_W,
.step_height = 1UL << DW100_ALIGN_H,
};
static const struct dw100_fmt {
u32 fourcc;
u32 types;
u32 reg_format;
bool reg_swap_uv;
} formats[] = {
{
.fourcc = V4L2_PIX_FMT_NV16,
.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
.reg_swap_uv = false,
}, {
.fourcc = V4L2_PIX_FMT_NV16M,
.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
.reg_swap_uv = false,
}, {
.fourcc = V4L2_PIX_FMT_NV61,
.types = DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
.reg_swap_uv = true,
}, {
.fourcc = V4L2_PIX_FMT_NV61M,
.types = DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_SP,
.reg_swap_uv = true,
}, {
.fourcc = V4L2_PIX_FMT_YUYV,
.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED,
.reg_swap_uv = false,
}, {
.fourcc = V4L2_PIX_FMT_UYVY,
.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED,
.reg_swap_uv = true,
}, {
.fourcc = V4L2_PIX_FMT_NV12,
.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
.reg_swap_uv = false,
}, {
.fourcc = V4L2_PIX_FMT_NV12M,
.types = DW100_FMT_OUTPUT | DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
.reg_swap_uv = false,
}, {
.fourcc = V4L2_PIX_FMT_NV21,
.types = DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
.reg_swap_uv = true,
}, {
.fourcc = V4L2_PIX_FMT_NV21M,
.types = DW100_FMT_CAPTURE,
.reg_format = DW100_DEWARP_CTRL_FORMAT_YUV420_SP,
.reg_swap_uv = true,
},
};
static inline int to_dw100_fmt_type(enum v4l2_buf_type type)
{
if (V4L2_TYPE_IS_OUTPUT(type))
return DW100_FMT_OUTPUT;
else
return DW100_FMT_CAPTURE;
}
static const struct dw100_fmt *dw100_find_pixel_format(u32 pixel_format,
int fmt_type)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(formats); i++) {
const struct dw100_fmt *fmt = &formats[i];
if (fmt->fourcc == pixel_format && fmt->types & fmt_type)
return fmt;
}
return NULL;
}
static const struct dw100_fmt *dw100_find_format(struct v4l2_format *f)
{
return dw100_find_pixel_format(f->fmt.pix_mp.pixelformat,
to_dw100_fmt_type(f->type));
}
static inline u32 dw100_read(struct dw100_device *dw_dev, u32 reg)
{
return readl(dw_dev->mmio + reg);
}
static inline void dw100_write(struct dw100_device *dw_dev, u32 reg, u32 val)
{
writel(val, dw_dev->mmio + reg);
}
static inline int dw100_dump_regs(struct seq_file *m)
{
struct dw100_device *dw_dev = m->private;
#define __DECLARE_REG(x) { #x, x }
unsigned int i;
static const struct reg_desc {
const char * const name;
unsigned int addr;
} dw100_regs[] = {
__DECLARE_REG(DW100_DEWARP_ID),
__DECLARE_REG(DW100_DEWARP_CTRL),
__DECLARE_REG(DW100_MAP_LUT_ADDR),
__DECLARE_REG(DW100_MAP_LUT_SIZE),
__DECLARE_REG(DW100_MAP_LUT_ADDR2),
__DECLARE_REG(DW100_MAP_LUT_SIZE2),
__DECLARE_REG(DW100_SRC_IMG_Y_BASE),
__DECLARE_REG(DW100_SRC_IMG_UV_BASE),
__DECLARE_REG(DW100_SRC_IMG_SIZE),
__DECLARE_REG(DW100_SRC_IMG_STRIDE),
__DECLARE_REG(DW100_DST_IMG_Y_BASE),
__DECLARE_REG(DW100_DST_IMG_UV_BASE),
__DECLARE_REG(DW100_DST_IMG_SIZE),
__DECLARE_REG(DW100_DST_IMG_STRIDE),
__DECLARE_REG(DW100_DST_IMG_Y_SIZE1),
__DECLARE_REG(DW100_DST_IMG_UV_SIZE1),
__DECLARE_REG(DW100_SRC_IMG_Y_BASE2),
__DECLARE_REG(DW100_SRC_IMG_UV_BASE2),
__DECLARE_REG(DW100_SRC_IMG_SIZE2),
__DECLARE_REG(DW100_SRC_IMG_STRIDE2),
__DECLARE_REG(DW100_DST_IMG_Y_BASE2),
__DECLARE_REG(DW100_DST_IMG_UV_BASE2),
__DECLARE_REG(DW100_DST_IMG_SIZE2),
__DECLARE_REG(DW100_DST_IMG_STRIDE2),
__DECLARE_REG(DW100_DST_IMG_Y_SIZE2),
__DECLARE_REG(DW100_DST_IMG_UV_SIZE2),
__DECLARE_REG(DW100_SWAP_CONTROL),
__DECLARE_REG(DW100_VERTICAL_SPLIT_LINE),
__DECLARE_REG(DW100_HORIZON_SPLIT_LINE),
__DECLARE_REG(DW100_SCALE_FACTOR),
__DECLARE_REG(DW100_ROI_START),
__DECLARE_REG(DW100_BOUNDARY_PIXEL),
__DECLARE_REG(DW100_INTERRUPT_STATUS),
__DECLARE_REG(DW100_BUS_CTRL),
__DECLARE_REG(DW100_BUS_CTRL1),
__DECLARE_REG(DW100_BUS_TIME_OUT_CYCLE),
};
for (i = 0; i < ARRAY_SIZE(dw100_regs); i++)
seq_printf(m, "%s: %#x\n", dw100_regs[i].name,
dw100_read(dw_dev, dw100_regs[i].addr));
return 0;
}
static inline struct dw100_ctx *dw100_file2ctx(struct file *file)
{
return container_of(file->private_data, struct dw100_ctx, fh);
}
static struct dw100_q_data *dw100_get_q_data(struct dw100_ctx *ctx,
enum v4l2_buf_type type)
{
if (type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
return &ctx->q_data[DW100_QUEUE_SRC];
else
return &ctx->q_data[DW100_QUEUE_DST];
}
static u32 dw100_get_n_vertices_from_length(u32 length)
{
return DIV_ROUND_UP(length, DW100_BLOCK_SIZE) + 1;
}
static u16 dw100_map_convert_to_uq12_4(u32 a)
{
return (u16)((a & 0xfff) << 4);
}
static u32 dw100_map_format_coordinates(u16 xq, u16 yq)
{
return (u32)((yq << 16) | xq);
}
static u32 *dw100_get_user_map(struct dw100_ctx *ctx)
{
struct v4l2_ctrl *ctrl = ctx->ctrls[DW100_CTRL_DEWARPING_MAP];
return ctrl->p_cur.p_u32;
}
/*
* Create the dewarp map used by the hardware from the V4L2 control values which
* have been initialized with an identity map or set by the application.
*/
static int dw100_create_mapping(struct dw100_ctx *ctx)
{
u32 *user_map;
if (ctx->map)
dma_free_coherent(&ctx->dw_dev->pdev->dev, ctx->map_size,
ctx->map, ctx->map_dma);
ctx->map = dma_alloc_coherent(&ctx->dw_dev->pdev->dev, ctx->map_size,
&ctx->map_dma, GFP_KERNEL);
if (!ctx->map)
return -ENOMEM;
user_map = dw100_get_user_map(ctx);
memcpy(ctx->map, user_map, ctx->map_size);
dev_dbg(&ctx->dw_dev->pdev->dev,
"%ux%u %s mapping created (d:%pad-c:%p) for stream %ux%u->%ux%u\n",
ctx->map_width, ctx->map_height,
ctx->user_map_is_set ? "user" : "identity",
&ctx->map_dma, ctx->map,
ctx->q_data[DW100_QUEUE_SRC].pix_fmt.width,
ctx->q_data[DW100_QUEUE_DST].pix_fmt.height,
ctx->q_data[DW100_QUEUE_SRC].pix_fmt.width,
ctx->q_data[DW100_QUEUE_DST].pix_fmt.height);
return 0;
}
static void dw100_destroy_mapping(struct dw100_ctx *ctx)
{
if (ctx->map) {
dma_free_coherent(&ctx->dw_dev->pdev->dev, ctx->map_size,
ctx->map, ctx->map_dma);
ctx->map = NULL;
}
}
static int dw100_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct dw100_ctx *ctx =
container_of(ctrl->handler, struct dw100_ctx, hdl);
switch (ctrl->id) {
case V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP:
ctx->user_map_is_set = true;
break;
}
return 0;
}
static const struct v4l2_ctrl_ops dw100_ctrl_ops = {
.s_ctrl = dw100_s_ctrl,
};
/*
* Initialize the dewarping map with an identity mapping.
*
* A 16 pixels cell size grid is mapped on the destination image.
* The last cells width/height might be lesser than 16 if the destination image
* width/height is not divisible by 16. This dewarping grid map specifies the
* source image pixel location (x, y) on each grid intersection point.
* Bilinear interpolation is used to compute inner cell points locations.
*
* The coordinates are saved in UQ12.4 fixed point format.
*/
static void dw100_ctrl_dewarping_map_init(const struct v4l2_ctrl *ctrl,
u32 from_idx,
union v4l2_ctrl_ptr ptr)
{
struct dw100_ctx *ctx =
container_of(ctrl->handler, struct dw100_ctx, hdl);
u32 sw, sh, mw, mh, idx;
u16 qx, qy, qdx, qdy, qsh, qsw;
u32 *map = ctrl->p_cur.p_u32;
sw = ctx->q_data[DW100_QUEUE_SRC].pix_fmt.width;
sh = ctx->q_data[DW100_QUEUE_SRC].pix_fmt.height;
mw = ctrl->dims[0];
mh = ctrl->dims[1];
qsw = dw100_map_convert_to_uq12_4(sw);
qsh = dw100_map_convert_to_uq12_4(sh);
qdx = qsw / (mw - 1);
qdy = qsh / (mh - 1);
ctx->map_width = mw;
ctx->map_height = mh;
ctx->map_size = mh * mw * sizeof(u32);
for (idx = from_idx; idx < ctrl->elems; idx++) {
qy = min_t(u32, (idx / mw) * qdy, qsh);
qx = min_t(u32, (idx % mw) * qdx, qsw);
map[idx] = dw100_map_format_coordinates(qx, qy);
}
ctx->user_map_is_set = false;
}
static const struct v4l2_ctrl_type_ops dw100_ctrl_type_ops = {
.init = dw100_ctrl_dewarping_map_init,
.validate = v4l2_ctrl_type_op_validate,
.log = v4l2_ctrl_type_op_log,
.equal = v4l2_ctrl_type_op_equal,
};
static const struct v4l2_ctrl_config controls[] = {
[DW100_CTRL_DEWARPING_MAP] = {
.ops = &dw100_ctrl_ops,
.type_ops = &dw100_ctrl_type_ops,
.id = V4L2_CID_DW100_DEWARPING_16x16_VERTEX_MAP,
.name = "Dewarping Vertex Map",
.type = V4L2_CTRL_TYPE_U32,
.min = 0x00000000,
.max = 0xffffffff,
.step = 1,
.def = 0,
.dims = { DW100_DEF_LUT_W, DW100_DEF_LUT_H },
},
};
static int dw100_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct dw100_ctx *ctx = vb2_get_drv_priv(vq);
const struct v4l2_pix_format_mplane *format;
unsigned int i;
format = &dw100_get_q_data(ctx, vq->type)->pix_fmt;
if (*nplanes) {
if (*nplanes != format->num_planes)
return -EINVAL;
for (i = 0; i < *nplanes; ++i) {
if (sizes[i] < format->plane_fmt[i].sizeimage)
return -EINVAL;
}
return 0;
}
*nplanes = format->num_planes;
for (i = 0; i < format->num_planes; ++i)
sizes[i] = format->plane_fmt[i].sizeimage;
return 0;
}
static int dw100_buf_prepare(struct vb2_buffer *vb)
{
unsigned int i;
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct dw100_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct dw100_device *dw_dev = ctx->dw_dev;
const struct v4l2_pix_format_mplane *pix_fmt =
&dw100_get_q_data(ctx, vb->vb2_queue->type)->pix_fmt;
if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
if (vbuf->field != V4L2_FIELD_NONE) {
dev_dbg(&dw_dev->pdev->dev, "%x field isn't supported\n",
vbuf->field);
return -EINVAL;
}
}
for (i = 0; i < pix_fmt->num_planes; i++) {
unsigned long size = pix_fmt->plane_fmt[i].sizeimage;
if (vb2_plane_size(vb, i) < size) {
dev_dbg(&dw_dev->pdev->dev,
"User buffer too small (%lu < %lu)\n",
vb2_plane_size(vb, i), size);
return -EINVAL;
}
vb2_set_plane_payload(vb, i, size);
}
return 0;
}
static void dw100_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct dw100_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
}
static void dw100_return_all_buffers(struct vb2_queue *q,
enum vb2_buffer_state state)
{
struct dw100_ctx *ctx = vb2_get_drv_priv(q);
struct vb2_v4l2_buffer *vbuf;
for (;;) {
if (V4L2_TYPE_IS_OUTPUT(q->type))
vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
else
vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
if (!vbuf)
return;
v4l2_m2m_buf_done(vbuf, state);
}
}
static int dw100_start_streaming(struct vb2_queue *q, unsigned int count)
{
struct dw100_ctx *ctx = vb2_get_drv_priv(q);
struct dw100_q_data *q_data = dw100_get_q_data(ctx, q->type);
int ret;
q_data->sequence = 0;
ret = dw100_create_mapping(ctx);
if (ret)
goto err;
ret = pm_runtime_resume_and_get(&ctx->dw_dev->pdev->dev);
if (ret) {
dw100_destroy_mapping(ctx);
goto err;
}
return 0;
err:
dw100_return_all_buffers(q, VB2_BUF_STATE_QUEUED);
return ret;
}
static void dw100_stop_streaming(struct vb2_queue *q)
{
struct dw100_ctx *ctx = vb2_get_drv_priv(q);
dw100_return_all_buffers(q, VB2_BUF_STATE_ERROR);
pm_runtime_put_sync(&ctx->dw_dev->pdev->dev);
dw100_destroy_mapping(ctx);
}
static const struct vb2_ops dw100_qops = {
.queue_setup = dw100_queue_setup,
.buf_prepare = dw100_buf_prepare,
.buf_queue = dw100_buf_queue,
.start_streaming = dw100_start_streaming,
.stop_streaming = dw100_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
static int dw100_m2m_queue_init(void *priv, struct vb2_queue *src_vq,
struct vb2_queue *dst_vq)
{
struct dw100_ctx *ctx = priv;
int ret;
src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
src_vq->drv_priv = ctx;
src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
src_vq->ops = &dw100_qops;
src_vq->mem_ops = &vb2_dma_contig_memops;
src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
src_vq->lock = &ctx->vq_mutex;
src_vq->dev = ctx->dw_dev->v4l2_dev.dev;
ret = vb2_queue_init(src_vq);
if (ret)
return ret;
dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
dst_vq->drv_priv = ctx;
dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
dst_vq->ops = &dw100_qops;
dst_vq->mem_ops = &vb2_dma_contig_memops;
dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
dst_vq->lock = &ctx->vq_mutex;
dst_vq->dev = ctx->dw_dev->v4l2_dev.dev;
return vb2_queue_init(dst_vq);
}
static int dw100_open(struct file *file)
{
struct dw100_device *dw_dev = video_drvdata(file);
struct dw100_ctx *ctx;
struct v4l2_ctrl_handler *hdl;
struct v4l2_pix_format_mplane *pix_fmt;
int ret, i;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
mutex_init(&ctx->vq_mutex);
v4l2_fh_init(&ctx->fh, video_devdata(file));
file->private_data = &ctx->fh;
ctx->dw_dev = dw_dev;
ctx->q_data[DW100_QUEUE_SRC].fmt = &formats[0];
pix_fmt = &ctx->q_data[DW100_QUEUE_SRC].pix_fmt;
pix_fmt->field = V4L2_FIELD_NONE;
pix_fmt->colorspace = V4L2_COLORSPACE_REC709;
pix_fmt->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_fmt->colorspace);
pix_fmt->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_fmt->colorspace);
pix_fmt->quantization =
V4L2_MAP_QUANTIZATION_DEFAULT(false, pix_fmt->colorspace,
pix_fmt->ycbcr_enc);
v4l2_fill_pixfmt_mp(pix_fmt, formats[0].fourcc, DW100_DEF_W, DW100_DEF_H);
ctx->q_data[DW100_QUEUE_SRC].crop.top = 0;
ctx->q_data[DW100_QUEUE_SRC].crop.left = 0;
ctx->q_data[DW100_QUEUE_SRC].crop.width = DW100_DEF_W;
ctx->q_data[DW100_QUEUE_SRC].crop.height = DW100_DEF_H;
ctx->q_data[DW100_QUEUE_DST] = ctx->q_data[DW100_QUEUE_SRC];
hdl = &ctx->hdl;
v4l2_ctrl_handler_init(hdl, ARRAY_SIZE(controls));
for (i = 0; i < ARRAY_SIZE(controls); i++) {
ctx->ctrls[i] = v4l2_ctrl_new_custom(hdl, &controls[i], NULL);
if (hdl->error) {
dev_err(&ctx->dw_dev->pdev->dev,
"Adding control (%d) failed\n", i);
ret = hdl->error;
goto err;
}
}
ctx->fh.ctrl_handler = hdl;
ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dw_dev->m2m_dev,
ctx, &dw100_m2m_queue_init);
if (IS_ERR(ctx->fh.m2m_ctx)) {
ret = PTR_ERR(ctx->fh.m2m_ctx);
goto err;
}
v4l2_fh_add(&ctx->fh);
return 0;
err:
v4l2_ctrl_handler_free(hdl);
v4l2_fh_exit(&ctx->fh);
mutex_destroy(&ctx->vq_mutex);
kfree(ctx);
return ret;
}
static int dw100_release(struct file *file)
{
struct dw100_ctx *ctx = dw100_file2ctx(file);
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
v4l2_ctrl_handler_free(&ctx->hdl);
v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
mutex_destroy(&ctx->vq_mutex);
kfree(ctx);
return 0;
}
static const struct v4l2_file_operations dw100_fops = {
.owner = THIS_MODULE,
.open = dw100_open,
.release = dw100_release,
.poll = v4l2_m2m_fop_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = v4l2_m2m_fop_mmap,
};
static int dw100_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strscpy(cap->driver, DRV_NAME, sizeof(cap->driver));
strscpy(cap->card, "DW100 dewarper", sizeof(cap->card));
return 0;
}
static int dw100_enum_fmt_vid(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
int i, num = 0;
for (i = 0; i < ARRAY_SIZE(formats); i++) {
if (formats[i].types & to_dw100_fmt_type(f->type)) {
if (num == f->index) {
f->pixelformat = formats[i].fourcc;
return 0;
}
++num;
}
}
return -EINVAL;
}
static int dw100_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *fsize)
{
const struct dw100_fmt *fmt;
if (fsize->index)
return -EINVAL;
fmt = dw100_find_pixel_format(fsize->pixel_format,
DW100_FMT_OUTPUT | DW100_FMT_CAPTURE);
if (!fmt)
return -EINVAL;
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
fsize->stepwise = dw100_frmsize_stepwise;
return 0;
}
static int dw100_g_fmt_vid(struct file *file, void *priv, struct v4l2_format *f)
{
struct dw100_ctx *ctx = dw100_file2ctx(file);
struct vb2_queue *vq;
struct dw100_q_data *q_data;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (!vq)
return -EINVAL;
q_data = dw100_get_q_data(ctx, f->type);
f->fmt.pix_mp = q_data->pix_fmt;
return 0;
}
static int dw100_try_fmt(struct file *file, struct v4l2_format *f)
{
struct dw100_ctx *ctx = dw100_file2ctx(file);
struct v4l2_pix_format_mplane *pix = &f->fmt.pix_mp;
const struct dw100_fmt *fmt;
fmt = dw100_find_format(f);
if (!fmt) {
fmt = &formats[0];
pix->pixelformat = fmt->fourcc;
}
v4l2_apply_frmsize_constraints(&pix->width, &pix->height,
&dw100_frmsize_stepwise);
v4l2_fill_pixfmt_mp(pix, fmt->fourcc, pix->width, pix->height);
pix->field = V4L2_FIELD_NONE;
if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
if (pix->colorspace == V4L2_COLORSPACE_DEFAULT)
pix->colorspace = V4L2_COLORSPACE_REC709;
if (pix->xfer_func == V4L2_XFER_FUNC_DEFAULT)
pix->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix->colorspace);
if (pix->ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT)
pix->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix->colorspace);
if (pix->quantization == V4L2_QUANTIZATION_DEFAULT)
pix->quantization =
V4L2_MAP_QUANTIZATION_DEFAULT(false,
pix->colorspace,
pix->ycbcr_enc);
} else {
/*
* The DW100 can't perform colorspace conversion, the colorspace
* on the capture queue must be identical to the output queue.
*/
const struct dw100_q_data *q_data =
dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
pix->colorspace = q_data->pix_fmt.colorspace;
pix->xfer_func = q_data->pix_fmt.xfer_func;
pix->ycbcr_enc = q_data->pix_fmt.ycbcr_enc;
pix->quantization = q_data->pix_fmt.quantization;
}
return 0;
}
static int dw100_s_fmt(struct dw100_ctx *ctx, struct v4l2_format *f)
{
struct dw100_q_data *q_data;
struct vb2_queue *vq;
vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
if (!vq)
return -EINVAL;
q_data = dw100_get_q_data(ctx, f->type);
if (!q_data)
return -EINVAL;
if (vb2_is_busy(vq)) {
dev_dbg(&ctx->dw_dev->pdev->dev, "%s queue busy\n", __func__);
return -EBUSY;
}
q_data->fmt = dw100_find_format(f);
q_data->pix_fmt = f->fmt.pix_mp;
q_data->crop.top = 0;
q_data->crop.left = 0;
q_data->crop.width = f->fmt.pix_mp.width;
q_data->crop.height = f->fmt.pix_mp.height;
/* Propagate buffers encoding */
if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
struct dw100_q_data *dst_q_data =
dw100_get_q_data(ctx,
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
dst_q_data->pix_fmt.colorspace = q_data->pix_fmt.colorspace;
dst_q_data->pix_fmt.ycbcr_enc = q_data->pix_fmt.ycbcr_enc;
dst_q_data->pix_fmt.quantization = q_data->pix_fmt.quantization;
dst_q_data->pix_fmt.xfer_func = q_data->pix_fmt.xfer_func;
}
dev_dbg(&ctx->dw_dev->pdev->dev,
"Setting format for type %u, wxh: %ux%u, fmt: %p4cc\n",
f->type, q_data->pix_fmt.width, q_data->pix_fmt.height,
&q_data->pix_fmt.pixelformat);
if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
int ret;
u32 dims[V4L2_CTRL_MAX_DIMS] = {};
struct v4l2_ctrl *ctrl = ctx->ctrls[DW100_CTRL_DEWARPING_MAP];
dims[0] = dw100_get_n_vertices_from_length(q_data->pix_fmt.width);
dims[1] = dw100_get_n_vertices_from_length(q_data->pix_fmt.height);
ret = v4l2_ctrl_modify_dimensions(ctrl, dims);
if (ret) {
dev_err(&ctx->dw_dev->pdev->dev,
"Modifying LUT dimensions failed with error %d\n",
ret);
return ret;
}
}
return 0;
}
static int dw100_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
return dw100_try_fmt(file, f);
}
static int dw100_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct dw100_ctx *ctx = dw100_file2ctx(file);
int ret;
ret = dw100_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
ret = dw100_s_fmt(ctx, f);
if (ret)
return ret;
return 0;
}
static int dw100_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
if (f->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
return -EINVAL;
return dw100_try_fmt(file, f);
}
static int dw100_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct dw100_ctx *ctx = dw100_file2ctx(file);
int ret;
ret = dw100_try_fmt_vid_out(file, priv, f);
if (ret)
return ret;
ret = dw100_s_fmt(ctx, f);
if (ret)
return ret;
return 0;
}
static int dw100_g_selection(struct file *file, void *fh,
struct v4l2_selection *sel)
{
struct dw100_ctx *ctx = dw100_file2ctx(file);
struct dw100_q_data *src_q_data;
if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
return -EINVAL;
src_q_data = dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
switch (sel->target) {
case V4L2_SEL_TGT_CROP_DEFAULT:
case V4L2_SEL_TGT_CROP_BOUNDS:
sel->r.top = 0;
sel->r.left = 0;
sel->r.width = src_q_data->pix_fmt.width;
sel->r.height = src_q_data->pix_fmt.height;
break;
case V4L2_SEL_TGT_CROP:
sel->r.top = src_q_data->crop.top;
sel->r.left = src_q_data->crop.left;
sel->r.width = src_q_data->crop.width;
sel->r.height = src_q_data->crop.height;
break;
default:
return -EINVAL;
}
return 0;
}
static int dw100_s_selection(struct file *file, void *fh,
struct v4l2_selection *sel)
{
struct dw100_ctx *ctx = dw100_file2ctx(file);
struct dw100_q_data *src_q_data;
u32 qscalex, qscaley, qscale;
int x, y, w, h;
unsigned int wframe, hframe;
if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
return -EINVAL;
src_q_data = dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
dev_dbg(&ctx->dw_dev->pdev->dev,
">>> Buffer Type: %u Target: %u Rect: %ux%u@%d.%d\n",
sel->type, sel->target,
sel->r.width, sel->r.height, sel->r.left, sel->r.top);
switch (sel->target) {
case V4L2_SEL_TGT_CROP:
wframe = src_q_data->pix_fmt.width;
hframe = src_q_data->pix_fmt.height;
sel->r.top = clamp_t(int, sel->r.top, 0, hframe - DW100_MIN_H);
sel->r.left = clamp_t(int, sel->r.left, 0, wframe - DW100_MIN_W);
sel->r.height =
clamp(sel->r.height, DW100_MIN_H, hframe - sel->r.top);
sel->r.width =
clamp(sel->r.width, DW100_MIN_W, wframe - sel->r.left);
/* UQ16.16 for float operations */
qscalex = (sel->r.width << 16) / wframe;
qscaley = (sel->r.height << 16) / hframe;
y = sel->r.top;
x = sel->r.left;
if (qscalex == qscaley) {
qscale = qscalex;
} else {
switch (sel->flags) {
case 0:
qscale = (qscalex + qscaley) / 2;
break;
case V4L2_SEL_FLAG_GE:
qscale = max(qscaley, qscalex);
break;
case V4L2_SEL_FLAG_LE:
qscale = min(qscaley, qscalex);
break;
case V4L2_SEL_FLAG_LE | V4L2_SEL_FLAG_GE:
return -ERANGE;
default:
return -EINVAL;
}
}
w = (u32)((((u64)wframe << 16) * qscale) >> 32);
h = (u32)((((u64)hframe << 16) * qscale) >> 32);
x = x + (sel->r.width - w) / 2;
y = y + (sel->r.height - h) / 2;
x = min(wframe - w, (unsigned int)max(0, x));
y = min(hframe - h, (unsigned int)max(0, y));
sel->r.top = y;
sel->r.left = x;
sel->r.width = w;
sel->r.height = h;
src_q_data->crop.top = sel->r.top;
src_q_data->crop.left = sel->r.left;
src_q_data->crop.width = sel->r.width;
src_q_data->crop.height = sel->r.height;
break;
default:
return -EINVAL;
}
dev_dbg(&ctx->dw_dev->pdev->dev,
"<<< Buffer Type: %u Target: %u Rect: %ux%u@%d.%d\n",
sel->type, sel->target,
sel->r.width, sel->r.height, sel->r.left, sel->r.top);
return 0;
}
static const struct v4l2_ioctl_ops dw100_ioctl_ops = {
.vidioc_querycap = dw100_querycap,
.vidioc_enum_fmt_vid_cap = dw100_enum_fmt_vid,
.vidioc_enum_framesizes = dw100_enum_framesizes,
.vidioc_g_fmt_vid_cap_mplane = dw100_g_fmt_vid,
.vidioc_try_fmt_vid_cap_mplane = dw100_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap_mplane = dw100_s_fmt_vid_cap,
.vidioc_enum_fmt_vid_out = dw100_enum_fmt_vid,
.vidioc_g_fmt_vid_out_mplane = dw100_g_fmt_vid,
.vidioc_try_fmt_vid_out_mplane = dw100_try_fmt_vid_out,
.vidioc_s_fmt_vid_out_mplane = dw100_s_fmt_vid_out,
.vidioc_g_selection = dw100_g_selection,
.vidioc_s_selection = dw100_s_selection,
.vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
.vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
.vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
.vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
.vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
.vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
.vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
.vidioc_streamon = v4l2_m2m_ioctl_streamon,
.vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static void dw100_job_finish(struct dw100_device *dw_dev, bool with_error)
{
struct dw100_ctx *curr_ctx;
struct vb2_v4l2_buffer *src_vb, *dst_vb;
enum vb2_buffer_state buf_state;
curr_ctx = v4l2_m2m_get_curr_priv(dw_dev->m2m_dev);
if (!curr_ctx) {
dev_err(&dw_dev->pdev->dev,
"Instance released before the end of transaction\n");
return;
}
src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
if (likely(!with_error))
buf_state = VB2_BUF_STATE_DONE;
else
buf_state = VB2_BUF_STATE_ERROR;
v4l2_m2m_buf_done(src_vb, buf_state);
v4l2_m2m_buf_done(dst_vb, buf_state);
dev_dbg(&dw_dev->pdev->dev, "Finishing transaction with%s error(s)\n",
with_error ? "" : "out");
v4l2_m2m_job_finish(dw_dev->m2m_dev, curr_ctx->fh.m2m_ctx);
}
static void dw100_hw_reset(struct dw100_device *dw_dev)
{
u32 val;
val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
val |= DW100_DEWARP_CTRL_ENABLE;
val |= DW100_DEWARP_CTRL_SOFT_RESET;
dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
val &= ~DW100_DEWARP_CTRL_SOFT_RESET;
dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
}
static void _dw100_hw_set_master_bus_enable(struct dw100_device *dw_dev,
unsigned int enable)
{
u32 val;
dev_dbg(&dw_dev->pdev->dev, "%sable master bus\n",
enable ? "En" : "Dis");
val = dw100_read(dw_dev, DW100_BUS_CTRL);
if (enable)
val |= DW100_BUS_CTRL_AXI_MASTER_ENABLE;
else
val &= ~DW100_BUS_CTRL_AXI_MASTER_ENABLE;
dw100_write(dw_dev, DW100_BUS_CTRL, val);
}
static void dw100_hw_master_bus_enable(struct dw100_device *dw_dev)
{
_dw100_hw_set_master_bus_enable(dw_dev, 1);
}
static void dw100_hw_master_bus_disable(struct dw100_device *dw_dev)
{
_dw100_hw_set_master_bus_enable(dw_dev, 0);
}
static void dw100_hw_dewarp_start(struct dw100_device *dw_dev)
{
u32 val;
val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
dev_dbg(&dw_dev->pdev->dev, "Starting Hardware CTRL:0x%08x\n", val);
dw100_write(dw_dev, DW100_DEWARP_CTRL, val | DW100_DEWARP_CTRL_START);
dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
}
static void dw100_hw_init_ctrl(struct dw100_device *dw_dev)
{
u32 val;
/*
* Input format YUV422_SP
* Output format YUV422_SP
* No hardware handshake (SW)
* No automatic double src buffering (Single)
* No automatic double dst buffering (Single)
* No Black Line
* Prefetch image pixel traversal
*/
val = DW100_DEWARP_CTRL_ENABLE
/* Valid only for auto prefetch mode*/
| DW100_DEWARP_CTRL_PREFETCH_THRESHOLD(32);
/*
* Calculation mode required to support any scaling factor,
* but x4 slower than traversal mode.
*
* DW100_DEWARP_CTRL_PREFETCH_MODE_TRAVERSAL
* DW100_DEWARP_CTRL_PREFETCH_MODE_CALCULATION
* DW100_DEWARP_CTRL_PREFETCH_MODE_AUTO
*
* TODO: Find heuristics requiring calculation mode
*/
val |= DW100_DEWARP_CTRL_PREFETCH_MODE_CALCULATION;
dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
}
static void dw100_hw_set_pixel_boundary(struct dw100_device *dw_dev)
{
u32 val;
val = DW100_BOUNDARY_PIXEL_V(128)
| DW100_BOUNDARY_PIXEL_U(128)
| DW100_BOUNDARY_PIXEL_Y(0);
dw100_write(dw_dev, DW100_BOUNDARY_PIXEL, val);
}
static void dw100_hw_set_scale(struct dw100_device *dw_dev, u8 scale)
{
dev_dbg(&dw_dev->pdev->dev, "Setting scale factor to %u\n", scale);
dw100_write(dw_dev, DW100_SCALE_FACTOR, scale);
}
static void dw100_hw_set_roi(struct dw100_device *dw_dev, u32 x, u32 y)
{
u32 val;
dev_dbg(&dw_dev->pdev->dev, "Setting ROI region to %u.%u\n", x, y);
val = DW100_ROI_START_X(x) | DW100_ROI_START_Y(y);
dw100_write(dw_dev, DW100_ROI_START, val);
}
static void dw100_hw_set_src_crop(struct dw100_device *dw_dev,
const struct dw100_q_data *src_q_data,
const struct dw100_q_data *dst_q_data)
{
const struct v4l2_rect *rect = &src_q_data->crop;
u32 src_scale, qscale, left_scale, top_scale;
/* HW Scale is UQ1.7 encoded */
src_scale = (rect->width << 7) / src_q_data->pix_fmt.width;
dw100_hw_set_scale(dw_dev, src_scale);
qscale = (dst_q_data->pix_fmt.width << 7) / src_q_data->pix_fmt.width;
left_scale = ((rect->left << 7) * qscale) >> 14;
top_scale = ((rect->top << 7) * qscale) >> 14;
dw100_hw_set_roi(dw_dev, left_scale, top_scale);
}
static void dw100_hw_set_source(struct dw100_device *dw_dev,
const struct dw100_q_data *q_data,
struct vb2_buffer *buffer)
{
u32 width, height, stride, fourcc, val;
const struct dw100_fmt *fmt = q_data->fmt;
dma_addr_t addr_y = vb2_dma_contig_plane_dma_addr(buffer, 0);
dma_addr_t addr_uv;
width = q_data->pix_fmt.width;
height = q_data->pix_fmt.height;
stride = q_data->pix_fmt.plane_fmt[0].bytesperline;
fourcc = q_data->fmt->fourcc;
if (q_data->pix_fmt.num_planes == 2)
addr_uv = vb2_dma_contig_plane_dma_addr(buffer, 1);
else
addr_uv = addr_y + (stride * height);
dev_dbg(&dw_dev->pdev->dev,
"Set HW source registers for %ux%u - stride %u, pixfmt: %p4cc, dma:%pad\n",
width, height, stride, &fourcc, &addr_y);
/* Pixel Format */
val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
val &= ~DW100_DEWARP_CTRL_INPUT_FORMAT_MASK;
val |= DW100_DEWARP_CTRL_INPUT_FORMAT(fmt->reg_format);
dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
/* Swap */
val = dw100_read(dw_dev, DW100_SWAP_CONTROL);
val &= ~DW100_SWAP_CONTROL_SRC_MASK;
/*
* Data swapping is performed only on Y plane for source image.
*/
if (fmt->reg_swap_uv &&
fmt->reg_format == DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED)
val |= DW100_SWAP_CONTROL_SRC(DW100_SWAP_CONTROL_Y
(DW100_SWAP_CONTROL_BYTE));
dw100_write(dw_dev, DW100_SWAP_CONTROL, val);
/* Image resolution */
dw100_write(dw_dev, DW100_SRC_IMG_SIZE,
DW100_IMG_SIZE_WIDTH(width) | DW100_IMG_SIZE_HEIGHT(height));
dw100_write(dw_dev, DW100_SRC_IMG_STRIDE, stride);
/* Buffers */
dw100_write(dw_dev, DW100_SRC_IMG_Y_BASE, DW100_IMG_Y_BASE(addr_y));
dw100_write(dw_dev, DW100_SRC_IMG_UV_BASE, DW100_IMG_UV_BASE(addr_uv));
}
static void dw100_hw_set_destination(struct dw100_device *dw_dev,
const struct dw100_q_data *q_data,
const struct dw100_fmt *ifmt,
struct vb2_buffer *buffer)
{
u32 width, height, stride, fourcc, val, size_y, size_uv;
const struct dw100_fmt *fmt = q_data->fmt;
dma_addr_t addr_y, addr_uv;
width = q_data->pix_fmt.width;
height = q_data->pix_fmt.height;
stride = q_data->pix_fmt.plane_fmt[0].bytesperline;
fourcc = fmt->fourcc;
addr_y = vb2_dma_contig_plane_dma_addr(buffer, 0);
size_y = q_data->pix_fmt.plane_fmt[0].sizeimage;
if (q_data->pix_fmt.num_planes == 2) {
addr_uv = vb2_dma_contig_plane_dma_addr(buffer, 1);
size_uv = q_data->pix_fmt.plane_fmt[1].sizeimage;
} else {
addr_uv = addr_y + ALIGN(stride * height, 16);
size_uv = size_y;
if (fmt->reg_format == DW100_DEWARP_CTRL_FORMAT_YUV420_SP)
size_uv /= 2;
}
dev_dbg(&dw_dev->pdev->dev,
"Set HW source registers for %ux%u - stride %u, pixfmt: %p4cc, dma:%pad\n",
width, height, stride, &fourcc, &addr_y);
/* Pixel Format */
val = dw100_read(dw_dev, DW100_DEWARP_CTRL);
val &= ~DW100_DEWARP_CTRL_OUTPUT_FORMAT_MASK;
val |= DW100_DEWARP_CTRL_OUTPUT_FORMAT(fmt->reg_format);
dw100_write(dw_dev, DW100_DEWARP_CTRL, val);
/* Swap */
val = dw100_read(dw_dev, DW100_SWAP_CONTROL);
val &= ~DW100_SWAP_CONTROL_DST_MASK;
/*
* Avoid to swap twice
*/
if (fmt->reg_swap_uv ^
(ifmt->reg_swap_uv && ifmt->reg_format !=
DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED)) {
if (fmt->reg_format == DW100_DEWARP_CTRL_FORMAT_YUV422_PACKED)
val |= DW100_SWAP_CONTROL_DST(DW100_SWAP_CONTROL_Y
(DW100_SWAP_CONTROL_BYTE));
else
val |= DW100_SWAP_CONTROL_DST(DW100_SWAP_CONTROL_UV
(DW100_SWAP_CONTROL_BYTE));
}
dw100_write(dw_dev, DW100_SWAP_CONTROL, val);
/* Image resolution */
dw100_write(dw_dev, DW100_DST_IMG_SIZE,
DW100_IMG_SIZE_WIDTH(width) | DW100_IMG_SIZE_HEIGHT(height));
dw100_write(dw_dev, DW100_DST_IMG_STRIDE, stride);
dw100_write(dw_dev, DW100_DST_IMG_Y_BASE, DW100_IMG_Y_BASE(addr_y));
dw100_write(dw_dev, DW100_DST_IMG_UV_BASE, DW100_IMG_UV_BASE(addr_uv));
dw100_write(dw_dev, DW100_DST_IMG_Y_SIZE1, DW100_DST_IMG_Y_SIZE(size_y));
dw100_write(dw_dev, DW100_DST_IMG_UV_SIZE1,
DW100_DST_IMG_UV_SIZE(size_uv));
}
static void dw100_hw_set_mapping(struct dw100_device *dw_dev, dma_addr_t addr,
u32 width, u32 height)
{
dev_dbg(&dw_dev->pdev->dev,
"Set HW mapping registers for %ux%u addr:%pad",
width, height, &addr);
dw100_write(dw_dev, DW100_MAP_LUT_ADDR, DW100_MAP_LUT_ADDR_ADDR(addr));
dw100_write(dw_dev, DW100_MAP_LUT_SIZE, DW100_MAP_LUT_SIZE_WIDTH(width)
| DW100_MAP_LUT_SIZE_HEIGHT(height));
}
static void dw100_hw_clear_irq(struct dw100_device *dw_dev, unsigned int irq)
{
dw100_write(dw_dev, DW100_INTERRUPT_STATUS,
DW100_INTERRUPT_STATUS_INT_CLEAR(irq));
}
static void dw100_hw_enable_irq(struct dw100_device *dw_dev)
{
dw100_write(dw_dev, DW100_INTERRUPT_STATUS,
DW100_INTERRUPT_STATUS_INT_ENABLE_MASK);
}
static void dw100_hw_disable_irq(struct dw100_device *dw_dev)
{
dw100_write(dw_dev, DW100_INTERRUPT_STATUS, 0);
}
static u32 dw_hw_get_pending_irqs(struct dw100_device *dw_dev)
{
u32 val;
val = dw100_read(dw_dev, DW100_INTERRUPT_STATUS);
return DW100_INTERRUPT_STATUS_INT_STATUS(val);
}
static irqreturn_t dw100_irq_handler(int irq, void *dev_id)
{
struct dw100_device *dw_dev = dev_id;
u32 pending_irqs, err_irqs, frame_done_irq;
bool with_error = true;
pending_irqs = dw_hw_get_pending_irqs(dw_dev);
frame_done_irq = pending_irqs & DW100_INTERRUPT_STATUS_INT_FRAME_DONE;
err_irqs = DW100_INTERRUPT_STATUS_INT_ERR_STATUS(pending_irqs);
if (frame_done_irq) {
dev_dbg(&dw_dev->pdev->dev, "Frame done interrupt\n");
with_error = false;
err_irqs &= ~DW100_INTERRUPT_STATUS_INT_ERR_STATUS
(DW100_INTERRUPT_STATUS_INT_ERR_FRAME_DONE);
}
if (err_irqs)
dev_err(&dw_dev->pdev->dev, "Interrupt error: %#x\n", err_irqs);
dw100_hw_disable_irq(dw_dev);
dw100_hw_master_bus_disable(dw_dev);
dw100_hw_clear_irq(dw_dev, pending_irqs |
DW100_INTERRUPT_STATUS_INT_ERR_TIME_OUT);
dw100_job_finish(dw_dev, with_error);
return IRQ_HANDLED;
}
static void dw100_start(struct dw100_ctx *ctx, struct vb2_v4l2_buffer *in_vb,
struct vb2_v4l2_buffer *out_vb)
{
struct dw100_device *dw_dev = ctx->dw_dev;
out_vb->sequence =
dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)->sequence++;
in_vb->sequence =
dw100_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)->sequence++;
dev_dbg(&ctx->dw_dev->pdev->dev,
"Starting queues %p->%p, sequence %u->%u\n",
v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE),
v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE),
in_vb->sequence, out_vb->sequence);
v4l2_m2m_buf_copy_metadata(in_vb, out_vb, true);
/* Now, let's deal with hardware ... */
dw100_hw_master_bus_disable(dw_dev);
dw100_hw_init_ctrl(dw_dev);
dw100_hw_set_pixel_boundary(dw_dev);
dw100_hw_set_src_crop(dw_dev, &ctx->q_data[DW100_QUEUE_SRC],
&ctx->q_data[DW100_QUEUE_DST]);
dw100_hw_set_source(dw_dev, &ctx->q_data[DW100_QUEUE_SRC],
&in_vb->vb2_buf);
dw100_hw_set_destination(dw_dev, &ctx->q_data[DW100_QUEUE_DST],
ctx->q_data[DW100_QUEUE_SRC].fmt,
&out_vb->vb2_buf);
dw100_hw_set_mapping(dw_dev, ctx->map_dma,
ctx->map_width, ctx->map_height);
dw100_hw_enable_irq(dw_dev);
dw100_hw_dewarp_start(dw_dev);
/* Enable Bus */
dw100_hw_master_bus_enable(dw_dev);
}
static void dw100_device_run(void *priv)
{
struct dw100_ctx *ctx = priv;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
dw100_start(ctx, src_buf, dst_buf);
}
static const struct v4l2_m2m_ops dw100_m2m_ops = {
.device_run = dw100_device_run,
};
static struct video_device *dw100_init_video_device(struct dw100_device *dw_dev)
{
struct video_device *vfd = &dw_dev->vfd;
vfd->vfl_dir = VFL_DIR_M2M;
vfd->fops = &dw100_fops;
vfd->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
vfd->ioctl_ops = &dw100_ioctl_ops;
vfd->minor = -1;
vfd->release = video_device_release_empty;
vfd->v4l2_dev = &dw_dev->v4l2_dev;
vfd->lock = &dw_dev->vfd_mutex;
strscpy(vfd->name, DRV_NAME, sizeof(vfd->name));
mutex_init(vfd->lock);
video_set_drvdata(vfd, dw_dev);
return vfd;
}
static int dw100_dump_regs_show(struct seq_file *m, void *private)
{
struct dw100_device *dw_dev = m->private;
int ret;
ret = pm_runtime_resume_and_get(&dw_dev->pdev->dev);
if (ret < 0)
return ret;
ret = dw100_dump_regs(m);
pm_runtime_put_sync(&dw_dev->pdev->dev);
return ret;
}
DEFINE_SHOW_ATTRIBUTE(dw100_dump_regs);
static void dw100_debugfs_init(struct dw100_device *dw_dev)
{
dw_dev->debugfs_root =
debugfs_create_dir(dev_name(&dw_dev->pdev->dev), NULL);
debugfs_create_file("dump_regs", 0600, dw_dev->debugfs_root, dw_dev,
&dw100_dump_regs_fops);
}
static void dw100_debugfs_exit(struct dw100_device *dw_dev)
{
debugfs_remove_recursive(dw_dev->debugfs_root);
}
static int dw100_probe(struct platform_device *pdev)
{
struct dw100_device *dw_dev;
struct video_device *vfd;
struct resource *res;
int ret, irq;
dw_dev = devm_kzalloc(&pdev->dev, sizeof(*dw_dev), GFP_KERNEL);
if (!dw_dev)
return -ENOMEM;
dw_dev->pdev = pdev;
ret = devm_clk_bulk_get_all(&pdev->dev, &dw_dev->clks);
if (ret < 0) {
dev_err(&pdev->dev, "Unable to get clocks: %d\n", ret);
return ret;
}
dw_dev->num_clks = ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dw_dev->mmio = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(dw_dev->mmio))
return PTR_ERR(dw_dev->mmio);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
platform_set_drvdata(pdev, dw_dev);
pm_runtime_enable(&pdev->dev);
ret = pm_runtime_resume_and_get(&pdev->dev);
if (ret < 0) {
dev_err(&pdev->dev, "Unable to resume the device: %d\n", ret);
goto err_pm;
}
pm_runtime_put_sync(&pdev->dev);
ret = devm_request_irq(&pdev->dev, irq, dw100_irq_handler, IRQF_ONESHOT,
dev_name(&pdev->dev), dw_dev);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
return ret;
}
ret = v4l2_device_register(&pdev->dev, &dw_dev->v4l2_dev);
if (ret)
goto err_pm;
vfd = dw100_init_video_device(dw_dev);
dw_dev->m2m_dev = v4l2_m2m_init(&dw100_m2m_ops);
if (IS_ERR(dw_dev->m2m_dev)) {
dev_err(&pdev->dev, "Failed to init mem2mem device\n");
ret = PTR_ERR(dw_dev->m2m_dev);
goto err_v4l2;
}
dw_dev->mdev.dev = &pdev->dev;
strscpy(dw_dev->mdev.model, "dw100", sizeof(dw_dev->mdev.model));
media_device_init(&dw_dev->mdev);
dw_dev->v4l2_dev.mdev = &dw_dev->mdev;
ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
if (ret) {
dev_err(&pdev->dev, "Failed to register video device\n");
goto err_m2m;
}
ret = v4l2_m2m_register_media_controller(dw_dev->m2m_dev, vfd,
MEDIA_ENT_F_PROC_VIDEO_SCALER);
if (ret) {
dev_err(&pdev->dev, "Failed to init mem2mem media controller\n");
goto error_v4l2;
}
ret = media_device_register(&dw_dev->mdev);
if (ret) {
dev_err(&pdev->dev, "Failed to register mem2mem media device\n");
goto error_m2m_mc;
}
dw100_debugfs_init(dw_dev);
dev_info(&pdev->dev,
"dw100 v4l2 m2m registered as /dev/video%u\n", vfd->num);
return 0;
error_m2m_mc:
v4l2_m2m_unregister_media_controller(dw_dev->m2m_dev);
error_v4l2:
video_unregister_device(vfd);
err_m2m:
media_device_cleanup(&dw_dev->mdev);
v4l2_m2m_release(dw_dev->m2m_dev);
err_v4l2:
v4l2_device_unregister(&dw_dev->v4l2_dev);
err_pm:
pm_runtime_disable(&pdev->dev);
return ret;
}
static int dw100_remove(struct platform_device *pdev)
{
struct dw100_device *dw_dev = platform_get_drvdata(pdev);
dw100_debugfs_exit(dw_dev);
pm_runtime_disable(&pdev->dev);
media_device_unregister(&dw_dev->mdev);
v4l2_m2m_unregister_media_controller(dw_dev->m2m_dev);
media_device_cleanup(&dw_dev->mdev);
video_unregister_device(&dw_dev->vfd);
mutex_destroy(dw_dev->vfd.lock);
v4l2_m2m_release(dw_dev->m2m_dev);
v4l2_device_unregister(&dw_dev->v4l2_dev);
return 0;
}
static int __maybe_unused dw100_runtime_suspend(struct device *dev)
{
struct dw100_device *dw_dev = dev_get_drvdata(dev);
clk_bulk_disable_unprepare(dw_dev->num_clks, dw_dev->clks);
return 0;
}
static int __maybe_unused dw100_runtime_resume(struct device *dev)
{
int ret;
struct dw100_device *dw_dev = dev_get_drvdata(dev);
ret = clk_bulk_prepare_enable(dw_dev->num_clks, dw_dev->clks);
if (ret)
return ret;
dw100_hw_reset(dw_dev);
return 0;
}
static const struct dev_pm_ops dw100_pm = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(dw100_runtime_suspend,
dw100_runtime_resume, NULL)
};
static const struct of_device_id dw100_dt_ids[] = {
{ .compatible = "nxp,imx8mp-dw100", .data = NULL },
{ },
};
MODULE_DEVICE_TABLE(of, dw100_dt_ids);
static struct platform_driver dw100_driver = {
.probe = dw100_probe,
.remove = dw100_remove,
.driver = {
.name = DRV_NAME,
.pm = &dw100_pm,
.of_match_table = dw100_dt_ids,
},
};
module_platform_driver(dw100_driver);
MODULE_DESCRIPTION("DW100 Hardware dewarper");
MODULE_AUTHOR("Xavier Roumegue <Xavier.Roumegue@oss.nxp.com>");
MODULE_LICENSE("GPL");