--- /dev/null
+// 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, u32 elems,
+ 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 < 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:
+ 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");
projects / platform / kernel / linux-starfive.git / commitdiff