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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Support eMMa-PrP through mem2mem framework.
- *
- * eMMa-PrP is a piece of HW that allows fetching buffers
- * from one memory location and do several operations on
- * them such as scaling or format conversion giving, as a result
- * a new processed buffer in another memory location.
- *
- * Based on mem2mem_testdev.c by Pawel Osciak.
- *
- * Copyright (c) 2011 Vista Silicon S.L.
- * Javier Martin <javier.martin@vista-silicon.com>
- */
- #include <linux/module.h>
- #include <linux/clk.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
- #include <linux/io.h>
- #include <linux/platform_device.h>
- #include <media/v4l2-mem2mem.h>
- #include <media/v4l2-device.h>
- #include <media/v4l2-ioctl.h>
- #include <media/videobuf2-dma-contig.h>
- #include <linux/sizes.h>
- #define EMMAPRP_MODULE_NAME "mem2mem-emmaprp"
- MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs");
- MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
- MODULE_LICENSE("GPL");
- MODULE_VERSION("0.0.1");
- static bool debug;
- module_param(debug, bool, 0644);
- #define MIN_W 32
- #define MIN_H 32
- #define MAX_W 2040
- #define MAX_H 2046
- #define S_ALIGN 1 /* multiple of 2 */
- #define W_ALIGN_YUV420 3 /* multiple of 8 */
- #define W_ALIGN_OTHERS 2 /* multiple of 4 */
- #define H_ALIGN 1 /* multiple of 2 */
- /* Flags that indicate a format can be used for capture/output */
- #define MEM2MEM_CAPTURE (1 << 0)
- #define MEM2MEM_OUTPUT (1 << 1)
- #define MEM2MEM_NAME "m2m-emmaprp"
- /* In bytes, per queue */
- #define MEM2MEM_VID_MEM_LIMIT SZ_16M
- #define dprintk(dev, fmt, arg...) \
- v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
- /* EMMA PrP */
- #define PRP_CNTL 0x00
- #define PRP_INTR_CNTL 0x04
- #define PRP_INTRSTATUS 0x08
- #define PRP_SOURCE_Y_PTR 0x0c
- #define PRP_SOURCE_CB_PTR 0x10
- #define PRP_SOURCE_CR_PTR 0x14
- #define PRP_DEST_RGB1_PTR 0x18
- #define PRP_DEST_RGB2_PTR 0x1c
- #define PRP_DEST_Y_PTR 0x20
- #define PRP_DEST_CB_PTR 0x24
- #define PRP_DEST_CR_PTR 0x28
- #define PRP_SRC_FRAME_SIZE 0x2c
- #define PRP_DEST_CH1_LINE_STRIDE 0x30
- #define PRP_SRC_PIXEL_FORMAT_CNTL 0x34
- #define PRP_CH1_PIXEL_FORMAT_CNTL 0x38
- #define PRP_CH1_OUT_IMAGE_SIZE 0x3c
- #define PRP_CH2_OUT_IMAGE_SIZE 0x40
- #define PRP_SRC_LINE_STRIDE 0x44
- #define PRP_CSC_COEF_012 0x48
- #define PRP_CSC_COEF_345 0x4c
- #define PRP_CSC_COEF_678 0x50
- #define PRP_CH1_RZ_HORI_COEF1 0x54
- #define PRP_CH1_RZ_HORI_COEF2 0x58
- #define PRP_CH1_RZ_HORI_VALID 0x5c
- #define PRP_CH1_RZ_VERT_COEF1 0x60
- #define PRP_CH1_RZ_VERT_COEF2 0x64
- #define PRP_CH1_RZ_VERT_VALID 0x68
- #define PRP_CH2_RZ_HORI_COEF1 0x6c
- #define PRP_CH2_RZ_HORI_COEF2 0x70
- #define PRP_CH2_RZ_HORI_VALID 0x74
- #define PRP_CH2_RZ_VERT_COEF1 0x78
- #define PRP_CH2_RZ_VERT_COEF2 0x7c
- #define PRP_CH2_RZ_VERT_VALID 0x80
- #define PRP_CNTL_CH1EN (1 << 0)
- #define PRP_CNTL_CH2EN (1 << 1)
- #define PRP_CNTL_CSIEN (1 << 2)
- #define PRP_CNTL_DATA_IN_YUV420 (0 << 3)
- #define PRP_CNTL_DATA_IN_YUV422 (1 << 3)
- #define PRP_CNTL_DATA_IN_RGB16 (2 << 3)
- #define PRP_CNTL_DATA_IN_RGB32 (3 << 3)
- #define PRP_CNTL_CH1_OUT_RGB8 (0 << 5)
- #define PRP_CNTL_CH1_OUT_RGB16 (1 << 5)
- #define PRP_CNTL_CH1_OUT_RGB32 (2 << 5)
- #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5)
- #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7)
- #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7)
- #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7)
- #define PRP_CNTL_CH1_LEN (1 << 9)
- #define PRP_CNTL_CH2_LEN (1 << 10)
- #define PRP_CNTL_SKIP_FRAME (1 << 11)
- #define PRP_CNTL_SWRST (1 << 12)
- #define PRP_CNTL_CLKEN (1 << 13)
- #define PRP_CNTL_WEN (1 << 14)
- #define PRP_CNTL_CH1BYP (1 << 15)
- #define PRP_CNTL_IN_TSKIP(x) ((x) << 16)
- #define PRP_CNTL_CH1_TSKIP(x) ((x) << 19)
- #define PRP_CNTL_CH2_TSKIP(x) ((x) << 22)
- #define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25)
- #define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27)
- #define PRP_CNTL_CH2B1EN (1 << 29)
- #define PRP_CNTL_CH2B2EN (1 << 30)
- #define PRP_CNTL_CH2FEN (1UL << 31)
- #define PRP_SIZE_HEIGHT(x) (x)
- #define PRP_SIZE_WIDTH(x) ((x) << 16)
- /* IRQ Enable and status register */
- #define PRP_INTR_RDERR (1 << 0)
- #define PRP_INTR_CH1WERR (1 << 1)
- #define PRP_INTR_CH2WERR (1 << 2)
- #define PRP_INTR_CH1FC (1 << 3)
- #define PRP_INTR_CH2FC (1 << 5)
- #define PRP_INTR_LBOVF (1 << 7)
- #define PRP_INTR_CH2OVF (1 << 8)
- #define PRP_INTR_ST_RDERR (1 << 0)
- #define PRP_INTR_ST_CH1WERR (1 << 1)
- #define PRP_INTR_ST_CH2WERR (1 << 2)
- #define PRP_INTR_ST_CH2B2CI (1 << 3)
- #define PRP_INTR_ST_CH2B1CI (1 << 4)
- #define PRP_INTR_ST_CH1B2CI (1 << 5)
- #define PRP_INTR_ST_CH1B1CI (1 << 6)
- #define PRP_INTR_ST_LBOVF (1 << 7)
- #define PRP_INTR_ST_CH2OVF (1 << 8)
- struct emmaprp_fmt {
- u32 fourcc;
- /* Types the format can be used for */
- u32 types;
- };
- static struct emmaprp_fmt formats[] = {
- {
- .fourcc = V4L2_PIX_FMT_YUV420,
- .types = MEM2MEM_CAPTURE,
- },
- {
- .fourcc = V4L2_PIX_FMT_YUYV,
- .types = MEM2MEM_OUTPUT,
- },
- };
- /* Per-queue, driver-specific private data */
- struct emmaprp_q_data {
- unsigned int width;
- unsigned int height;
- unsigned int sizeimage;
- struct emmaprp_fmt *fmt;
- };
- enum {
- V4L2_M2M_SRC = 0,
- V4L2_M2M_DST = 1,
- };
- #define NUM_FORMATS ARRAY_SIZE(formats)
- static struct emmaprp_fmt *find_format(struct v4l2_format *f)
- {
- struct emmaprp_fmt *fmt;
- unsigned int k;
- for (k = 0; k < NUM_FORMATS; k++) {
- fmt = &formats[k];
- if (fmt->fourcc == f->fmt.pix.pixelformat)
- break;
- }
- if (k == NUM_FORMATS)
- return NULL;
- return &formats[k];
- }
- struct emmaprp_dev {
- struct v4l2_device v4l2_dev;
- struct video_device *vfd;
- struct mutex dev_mutex;
- spinlock_t irqlock;
- void __iomem *base_emma;
- struct clk *clk_emma_ahb, *clk_emma_ipg;
- struct v4l2_m2m_dev *m2m_dev;
- };
- struct emmaprp_ctx {
- struct v4l2_fh fh;
- struct emmaprp_dev *dev;
- /* Abort requested by m2m */
- int aborting;
- struct emmaprp_q_data q_data[2];
- };
- static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx,
- enum v4l2_buf_type type)
- {
- switch (type) {
- case V4L2_BUF_TYPE_VIDEO_OUTPUT:
- return &(ctx->q_data[V4L2_M2M_SRC]);
- case V4L2_BUF_TYPE_VIDEO_CAPTURE:
- return &(ctx->q_data[V4L2_M2M_DST]);
- default:
- BUG();
- }
- return NULL;
- }
- /*
- * mem2mem callbacks
- */
- static void emmaprp_job_abort(void *priv)
- {
- struct emmaprp_ctx *ctx = priv;
- struct emmaprp_dev *pcdev = ctx->dev;
- ctx->aborting = 1;
- dprintk(pcdev, "Aborting task\n");
- v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->fh.m2m_ctx);
- }
- static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev)
- {
- dprintk(pcdev,
- "eMMa-PrP Registers:\n"
- " SOURCE_Y_PTR = 0x%08X\n"
- " SRC_FRAME_SIZE = 0x%08X\n"
- " DEST_Y_PTR = 0x%08X\n"
- " DEST_CR_PTR = 0x%08X\n"
- " DEST_CB_PTR = 0x%08X\n"
- " CH2_OUT_IMAGE_SIZE = 0x%08X\n"
- " CNTL = 0x%08X\n",
- readl(pcdev->base_emma + PRP_SOURCE_Y_PTR),
- readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE),
- readl(pcdev->base_emma + PRP_DEST_Y_PTR),
- readl(pcdev->base_emma + PRP_DEST_CR_PTR),
- readl(pcdev->base_emma + PRP_DEST_CB_PTR),
- readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE),
- readl(pcdev->base_emma + PRP_CNTL));
- }
- static void emmaprp_device_run(void *priv)
- {
- struct emmaprp_ctx *ctx = priv;
- struct emmaprp_q_data *s_q_data, *d_q_data;
- struct vb2_v4l2_buffer *src_buf, *dst_buf;
- struct emmaprp_dev *pcdev = ctx->dev;
- unsigned int s_width, s_height;
- unsigned int d_width, d_height;
- unsigned int d_size;
- dma_addr_t p_in, p_out;
- u32 tmp;
- src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
- dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
- s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
- s_width = s_q_data->width;
- s_height = s_q_data->height;
- d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
- d_width = d_q_data->width;
- d_height = d_q_data->height;
- d_size = d_width * d_height;
- p_in = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
- p_out = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
- if (!p_in || !p_out) {
- v4l2_err(&pcdev->v4l2_dev,
- "Acquiring kernel pointers to buffers failed\n");
- return;
- }
- /* Input frame parameters */
- writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR);
- writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height),
- pcdev->base_emma + PRP_SRC_FRAME_SIZE);
- /* Output frame parameters */
- writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR);
- writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR);
- writel(p_out + d_size + (d_size >> 2),
- pcdev->base_emma + PRP_DEST_CR_PTR);
- writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height),
- pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE);
- /* IRQ configuration */
- tmp = readl(pcdev->base_emma + PRP_INTR_CNTL);
- writel(tmp | PRP_INTR_RDERR |
- PRP_INTR_CH2WERR |
- PRP_INTR_CH2FC,
- pcdev->base_emma + PRP_INTR_CNTL);
- emmaprp_dump_regs(pcdev);
- /* Enable transfer */
- tmp = readl(pcdev->base_emma + PRP_CNTL);
- writel(tmp | PRP_CNTL_CH2_OUT_YUV420 |
- PRP_CNTL_DATA_IN_YUV422 |
- PRP_CNTL_CH2EN,
- pcdev->base_emma + PRP_CNTL);
- }
- static irqreturn_t emmaprp_irq(int irq_emma, void *data)
- {
- struct emmaprp_dev *pcdev = data;
- struct emmaprp_ctx *curr_ctx;
- struct vb2_v4l2_buffer *src_vb, *dst_vb;
- unsigned long flags;
- u32 irqst;
- /* Check irq flags and clear irq */
- irqst = readl(pcdev->base_emma + PRP_INTRSTATUS);
- writel(irqst, pcdev->base_emma + PRP_INTRSTATUS);
- dprintk(pcdev, "irqst = 0x%08x\n", irqst);
- curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev);
- if (curr_ctx == NULL) {
- pr_err("Instance released before the end of transaction\n");
- return IRQ_HANDLED;
- }
- if (!curr_ctx->aborting) {
- if ((irqst & PRP_INTR_ST_RDERR) ||
- (irqst & PRP_INTR_ST_CH2WERR)) {
- pr_err("PrP bus error occurred, this transfer is probably corrupted\n");
- writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL);
- } else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */
- src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
- dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
- dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
- dst_vb->flags &=
- ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
- dst_vb->flags |=
- src_vb->flags
- & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
- dst_vb->timecode = src_vb->timecode;
- spin_lock_irqsave(&pcdev->irqlock, flags);
- v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
- v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
- spin_unlock_irqrestore(&pcdev->irqlock, flags);
- }
- }
- v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->fh.m2m_ctx);
- return IRQ_HANDLED;
- }
- /*
- * video ioctls
- */
- static int vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *cap)
- {
- strscpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
- strscpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
- return 0;
- }
- static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
- {
- int i, num;
- struct emmaprp_fmt *fmt;
- num = 0;
- for (i = 0; i < NUM_FORMATS; ++i) {
- if (formats[i].types & type) {
- /* index-th format of type type found ? */
- if (num == f->index)
- break;
- /* Correct type but haven't reached our index yet,
- * just increment per-type index */
- ++num;
- }
- }
- if (i < NUM_FORMATS) {
- /* Format found */
- fmt = &formats[i];
- f->pixelformat = fmt->fourcc;
- return 0;
- }
- /* Format not found */
- return -EINVAL;
- }
- static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_fmtdesc *f)
- {
- return enum_fmt(f, MEM2MEM_CAPTURE);
- }
- static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_fmtdesc *f)
- {
- return enum_fmt(f, MEM2MEM_OUTPUT);
- }
- static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
- {
- struct vb2_queue *vq;
- struct emmaprp_q_data *q_data;
- vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
- if (!vq)
- return -EINVAL;
- q_data = get_q_data(ctx, f->type);
- f->fmt.pix.width = q_data->width;
- f->fmt.pix.height = q_data->height;
- f->fmt.pix.field = V4L2_FIELD_NONE;
- f->fmt.pix.pixelformat = q_data->fmt->fourcc;
- if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420)
- f->fmt.pix.bytesperline = q_data->width * 3 / 2;
- else /* YUYV */
- f->fmt.pix.bytesperline = q_data->width * 2;
- f->fmt.pix.sizeimage = q_data->sizeimage;
- return 0;
- }
- static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- return vidioc_g_fmt(priv, f);
- }
- static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- return vidioc_g_fmt(priv, f);
- }
- static int vidioc_try_fmt(struct v4l2_format *f)
- {
- enum v4l2_field field;
- if (!find_format(f))
- return -EINVAL;
- field = f->fmt.pix.field;
- if (field == V4L2_FIELD_ANY)
- field = V4L2_FIELD_NONE;
- else if (V4L2_FIELD_NONE != field)
- return -EINVAL;
- /* V4L2 specification suggests the driver corrects the format struct
- * if any of the dimensions is unsupported */
- f->fmt.pix.field = field;
- if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) {
- v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
- W_ALIGN_YUV420, &f->fmt.pix.height,
- MIN_H, MAX_H, H_ALIGN, S_ALIGN);
- f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
- } else {
- v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W,
- W_ALIGN_OTHERS, &f->fmt.pix.height,
- MIN_H, MAX_H, H_ALIGN, S_ALIGN);
- f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
- }
- f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
- return 0;
- }
- static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- struct emmaprp_fmt *fmt;
- struct emmaprp_ctx *ctx = priv;
- fmt = find_format(f);
- if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) {
- v4l2_err(&ctx->dev->v4l2_dev,
- "Fourcc format (0x%08x) invalid.\n",
- f->fmt.pix.pixelformat);
- return -EINVAL;
- }
- return vidioc_try_fmt(f);
- }
- static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- struct emmaprp_fmt *fmt;
- struct emmaprp_ctx *ctx = priv;
- fmt = find_format(f);
- if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) {
- v4l2_err(&ctx->dev->v4l2_dev,
- "Fourcc format (0x%08x) invalid.\n",
- f->fmt.pix.pixelformat);
- return -EINVAL;
- }
- return vidioc_try_fmt(f);
- }
- static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f)
- {
- struct emmaprp_q_data *q_data;
- struct vb2_queue *vq;
- int ret;
- vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
- if (!vq)
- return -EINVAL;
- q_data = get_q_data(ctx, f->type);
- if (!q_data)
- return -EINVAL;
- if (vb2_is_busy(vq)) {
- v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
- return -EBUSY;
- }
- ret = vidioc_try_fmt(f);
- if (ret)
- return ret;
- q_data->fmt = find_format(f);
- q_data->width = f->fmt.pix.width;
- q_data->height = f->fmt.pix.height;
- if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
- q_data->sizeimage = q_data->width * q_data->height * 3 / 2;
- else /* YUYV */
- q_data->sizeimage = q_data->width * q_data->height * 2;
- dprintk(ctx->dev,
- "Setting format for type %d, wxh: %dx%d, fmt: %d\n",
- f->type, q_data->width, q_data->height, q_data->fmt->fourcc);
- return 0;
- }
- static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- int ret;
- ret = vidioc_try_fmt_vid_cap(file, priv, f);
- if (ret)
- return ret;
- return vidioc_s_fmt(priv, f);
- }
- static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
- struct v4l2_format *f)
- {
- int ret;
- ret = vidioc_try_fmt_vid_out(file, priv, f);
- if (ret)
- return ret;
- return vidioc_s_fmt(priv, f);
- }
- static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = {
- .vidioc_querycap = vidioc_querycap,
- .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
- .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
- .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
- .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
- .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
- .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
- .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
- .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
- .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_expbuf = v4l2_m2m_ioctl_expbuf,
- .vidioc_streamon = v4l2_m2m_ioctl_streamon,
- .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
- };
- /*
- * Queue operations
- */
- static int emmaprp_queue_setup(struct vb2_queue *vq,
- unsigned int *nbuffers, unsigned int *nplanes,
- unsigned int sizes[], struct device *alloc_devs[])
- {
- struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq);
- struct emmaprp_q_data *q_data;
- unsigned int size, count = *nbuffers;
- q_data = get_q_data(ctx, vq->type);
- if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420)
- size = q_data->width * q_data->height * 3 / 2;
- else
- size = q_data->width * q_data->height * 2;
- while (size * count > MEM2MEM_VID_MEM_LIMIT)
- (count)--;
- *nplanes = 1;
- *nbuffers = count;
- sizes[0] = size;
- dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
- return 0;
- }
- static int emmaprp_buf_prepare(struct vb2_buffer *vb)
- {
- struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
- struct emmaprp_q_data *q_data;
- dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
- q_data = get_q_data(ctx, vb->vb2_queue->type);
- if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
- dprintk(ctx->dev,
- "%s data will not fit into plane(%lu < %lu)\n",
- __func__, vb2_plane_size(vb, 0),
- (long)q_data->sizeimage);
- return -EINVAL;
- }
- vb2_set_plane_payload(vb, 0, q_data->sizeimage);
- return 0;
- }
- static void emmaprp_buf_queue(struct vb2_buffer *vb)
- {
- struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
- struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
- v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
- }
- static const struct vb2_ops emmaprp_qops = {
- .queue_setup = emmaprp_queue_setup,
- .buf_prepare = emmaprp_buf_prepare,
- .buf_queue = emmaprp_buf_queue,
- .wait_prepare = vb2_ops_wait_prepare,
- .wait_finish = vb2_ops_wait_finish,
- };
- static int queue_init(void *priv, struct vb2_queue *src_vq,
- struct vb2_queue *dst_vq)
- {
- struct emmaprp_ctx *ctx = priv;
- int ret;
- src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
- src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
- src_vq->drv_priv = ctx;
- src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
- src_vq->ops = &emmaprp_qops;
- src_vq->mem_ops = &vb2_dma_contig_memops;
- src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
- src_vq->dev = ctx->dev->v4l2_dev.dev;
- src_vq->lock = &ctx->dev->dev_mutex;
- ret = vb2_queue_init(src_vq);
- if (ret)
- return ret;
- dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
- dst_vq->drv_priv = ctx;
- dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
- dst_vq->ops = &emmaprp_qops;
- dst_vq->mem_ops = &vb2_dma_contig_memops;
- dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
- dst_vq->dev = ctx->dev->v4l2_dev.dev;
- dst_vq->lock = &ctx->dev->dev_mutex;
- return vb2_queue_init(dst_vq);
- }
- /*
- * File operations
- */
- static int emmaprp_open(struct file *file)
- {
- struct emmaprp_dev *pcdev = video_drvdata(file);
- struct emmaprp_ctx *ctx;
- ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
- if (!ctx)
- return -ENOMEM;
- v4l2_fh_init(&ctx->fh, video_devdata(file));
- file->private_data = &ctx->fh;
- ctx->dev = pcdev;
- if (mutex_lock_interruptible(&pcdev->dev_mutex)) {
- kfree(ctx);
- return -ERESTARTSYS;
- }
- ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
- if (IS_ERR(ctx->fh.m2m_ctx)) {
- int ret = PTR_ERR(ctx->fh.m2m_ctx);
- mutex_unlock(&pcdev->dev_mutex);
- kfree(ctx);
- return ret;
- }
- clk_prepare_enable(pcdev->clk_emma_ipg);
- clk_prepare_enable(pcdev->clk_emma_ahb);
- ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1];
- ctx->q_data[V4L2_M2M_DST].fmt = &formats[0];
- v4l2_fh_add(&ctx->fh);
- mutex_unlock(&pcdev->dev_mutex);
- dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->fh.m2m_ctx);
- return 0;
- }
- static int emmaprp_release(struct file *file)
- {
- struct emmaprp_dev *pcdev = video_drvdata(file);
- struct emmaprp_ctx *ctx = file->private_data;
- dprintk(pcdev, "Releasing instance %p\n", ctx);
- mutex_lock(&pcdev->dev_mutex);
- clk_disable_unprepare(pcdev->clk_emma_ahb);
- clk_disable_unprepare(pcdev->clk_emma_ipg);
- v4l2_fh_del(&ctx->fh);
- v4l2_fh_exit(&ctx->fh);
- v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
- mutex_unlock(&pcdev->dev_mutex);
- kfree(ctx);
- return 0;
- }
- static const struct v4l2_file_operations emmaprp_fops = {
- .owner = THIS_MODULE,
- .open = emmaprp_open,
- .release = emmaprp_release,
- .poll = v4l2_m2m_fop_poll,
- .unlocked_ioctl = video_ioctl2,
- .mmap = v4l2_m2m_fop_mmap,
- };
- static const struct video_device emmaprp_videodev = {
- .name = MEM2MEM_NAME,
- .fops = &emmaprp_fops,
- .ioctl_ops = &emmaprp_ioctl_ops,
- .minor = -1,
- .release = video_device_release,
- .vfl_dir = VFL_DIR_M2M,
- .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
- };
- static const struct v4l2_m2m_ops m2m_ops = {
- .device_run = emmaprp_device_run,
- .job_abort = emmaprp_job_abort,
- };
- static int emmaprp_probe(struct platform_device *pdev)
- {
- struct emmaprp_dev *pcdev;
- struct video_device *vfd;
- struct resource *res;
- int irq, ret;
- pcdev = devm_kzalloc(&pdev->dev, sizeof(*pcdev), GFP_KERNEL);
- if (!pcdev)
- return -ENOMEM;
- spin_lock_init(&pcdev->irqlock);
- pcdev->clk_emma_ipg = devm_clk_get(&pdev->dev, "ipg");
- if (IS_ERR(pcdev->clk_emma_ipg)) {
- return PTR_ERR(pcdev->clk_emma_ipg);
- }
- pcdev->clk_emma_ahb = devm_clk_get(&pdev->dev, "ahb");
- if (IS_ERR(pcdev->clk_emma_ahb))
- return PTR_ERR(pcdev->clk_emma_ahb);
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- pcdev->base_emma = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(pcdev->base_emma))
- return PTR_ERR(pcdev->base_emma);
- ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
- if (ret)
- return ret;
- mutex_init(&pcdev->dev_mutex);
- vfd = video_device_alloc();
- if (!vfd) {
- v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
- ret = -ENOMEM;
- goto unreg_dev;
- }
- *vfd = emmaprp_videodev;
- vfd->lock = &pcdev->dev_mutex;
- vfd->v4l2_dev = &pcdev->v4l2_dev;
- video_set_drvdata(vfd, pcdev);
- pcdev->vfd = vfd;
- v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME
- " Device registered as /dev/video%d\n", vfd->num);
- platform_set_drvdata(pdev, pcdev);
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- ret = irq;
- goto rel_vdev;
- }
- ret = devm_request_irq(&pdev->dev, irq, emmaprp_irq, 0,
- dev_name(&pdev->dev), pcdev);
- if (ret)
- goto rel_vdev;
- pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
- if (IS_ERR(pcdev->m2m_dev)) {
- v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
- ret = PTR_ERR(pcdev->m2m_dev);
- goto rel_vdev;
- }
- ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
- if (ret) {
- v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
- goto rel_m2m;
- }
- return 0;
- rel_m2m:
- v4l2_m2m_release(pcdev->m2m_dev);
- rel_vdev:
- video_device_release(vfd);
- unreg_dev:
- v4l2_device_unregister(&pcdev->v4l2_dev);
- mutex_destroy(&pcdev->dev_mutex);
- return ret;
- }
- static int emmaprp_remove(struct platform_device *pdev)
- {
- struct emmaprp_dev *pcdev = platform_get_drvdata(pdev);
- v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME);
- video_unregister_device(pcdev->vfd);
- v4l2_m2m_release(pcdev->m2m_dev);
- v4l2_device_unregister(&pcdev->v4l2_dev);
- mutex_destroy(&pcdev->dev_mutex);
- return 0;
- }
- static struct platform_driver emmaprp_pdrv = {
- .probe = emmaprp_probe,
- .remove = emmaprp_remove,
- .driver = {
- .name = MEM2MEM_NAME,
- },
- };
- module_platform_driver(emmaprp_pdrv);
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