Hi Hans, Thanks for the review comments. Frankly, I was not following the recent changes related to vb2 framework. And I didn't tested the driver for v4l2-compliance :( Will try to address all your comments in the next version of posting and this time with v4l2-compliance :) Regards, Shaik Ameer Basha On Wed, Mar 19, 2014 at 1:19 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote: > Thanks for this patch series! > > I've got some comments below... > > Regards, > > Hans > > On 03/19/2014 08:13 AM, Shaik Ameer Basha wrote: >> This patch adds memory to memory (m2m) interface functionality >> for the SCALER driver. >> >> [arun.kk@xxxxxxxxxxx: fix compilation issues] >> >> Signed-off-by: Shaik Ameer Basha <shaik.ameer@xxxxxxxxxxx> >> Signed-off-by: Arun Kumar K <arun.kk@xxxxxxxxxxx> >> Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> >> --- >> drivers/media/platform/exynos-scaler/scaler-m2m.c | 788 +++++++++++++++++++++ >> 1 file changed, 788 insertions(+) >> create mode 100644 drivers/media/platform/exynos-scaler/scaler-m2m.c >> >> diff --git a/drivers/media/platform/exynos-scaler/scaler-m2m.c b/drivers/media/platform/exynos-scaler/scaler-m2m.c >> new file mode 100644 >> index 0000000..7b21a17 >> --- /dev/null >> +++ b/drivers/media/platform/exynos-scaler/scaler-m2m.c >> @@ -0,0 +1,788 @@ >> +/* >> + * Copyright (c) 2014 Samsung Electronics Co., Ltd. >> + * http://www.samsung.com >> + * >> + * Samsung EXYNOS5 SoC series SCALER driver >> + * >> + * This program is free software; you can redistribute it and/or modify >> + * it under the terms of the GNU General Public License version 2 as >> + * published by the Free Software Foundation. >> + */ >> + >> +#include <linux/module.h> >> +#include <linux/pm_runtime.h> >> +#include <linux/slab.h> >> + >> +#include <media/v4l2-ioctl.h> >> + >> +#include "scaler-regs.h" >> + >> +#define SCALER_DEF_PIX_FMT V4L2_PIX_FMT_RGB32 >> +#define SCALER_DEF_WIDTH 1280 >> +#define SCALER_DEF_HEIGHT 720 >> + >> +static int scaler_m2m_ctx_stop_req(struct scaler_ctx *ctx) >> +{ >> + struct scaler_ctx *curr_ctx; >> + struct scaler_dev *scaler = ctx->scaler_dev; >> + int ret; >> + >> + curr_ctx = v4l2_m2m_get_curr_priv(scaler->m2m.m2m_dev); >> + if (!scaler_m2m_pending(scaler) || (curr_ctx != ctx)) >> + return 0; >> + >> + scaler_ctx_state_lock_set(SCALER_CTX_STOP_REQ, ctx); >> + ret = wait_event_timeout(scaler->irq_queue, >> + !scaler_ctx_state_is_set(SCALER_CTX_STOP_REQ, ctx), >> + SCALER_SHUTDOWN_TIMEOUT); >> + >> + return ret == 0 ? -ETIMEDOUT : ret; >> +} >> + >> +static int scaler_m2m_start_streaming(struct vb2_queue *q, unsigned int count) >> +{ >> + struct scaler_ctx *ctx = q->drv_priv; >> + int ret; >> + >> + ret = pm_runtime_get_sync(&ctx->scaler_dev->pdev->dev); >> + >> + return ret > 0 ? 0 : ret; >> +} > > If an error occurs, then all queued buffers must be returned to the vb2 > core with vb2_buffer_done with state VB2_BUF_STATE_QUEUED. A lot of vb2 > instrumentation has been added in recent weeks to check for correct > buffer handling, and this was one of the corner cases that was never > handled correctly. If you compile with the VIDEO_ADV_DEBUG config option > you'll see warnings appearing if this function returns an error and the > buffers aren't requeued. It's a good test to do. > >> + >> +static int scaler_m2m_stop_streaming(struct vb2_queue *q) >> +{ >> + struct scaler_ctx *ctx = q->drv_priv; >> + int ret; >> + >> + ret = scaler_m2m_ctx_stop_req(ctx); >> + if (ret < 0) >> + scaler_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); >> + >> + pm_runtime_put(&ctx->scaler_dev->pdev->dev); >> + >> + return 0; >> +} >> + >> +void scaler_m2m_job_finish(struct scaler_ctx *ctx, int vb_state) >> +{ >> + struct vb2_buffer *src_vb, *dst_vb; >> + >> + if (!ctx || !ctx->m2m_ctx) >> + return; >> + >> + src_vb = v4l2_m2m_src_buf_remove(ctx->m2m_ctx); >> + dst_vb = v4l2_m2m_dst_buf_remove(ctx->m2m_ctx); >> + >> + if (src_vb && dst_vb) { >> + v4l2_m2m_buf_done(src_vb, vb_state); >> + v4l2_m2m_buf_done(dst_vb, vb_state); >> + >> + v4l2_m2m_job_finish(ctx->scaler_dev->m2m.m2m_dev, >> + ctx->m2m_ctx); >> + } >> +} >> + >> +static void scaler_m2m_job_abort(void *priv) >> +{ >> + struct scaler_ctx *ctx = priv; >> + int ret; >> + >> + ret = scaler_m2m_ctx_stop_req(ctx); >> + if (ret < 0) >> + scaler_m2m_job_finish(ctx, VB2_BUF_STATE_ERROR); >> +} >> + >> +static int scaler_get_bufs(struct scaler_ctx *ctx) >> +{ >> + struct scaler_frame *s_frame, *d_frame; >> + struct vb2_buffer *src_vb, *dst_vb; >> + int ret; >> + >> + s_frame = &ctx->s_frame; >> + d_frame = &ctx->d_frame; >> + >> + src_vb = v4l2_m2m_next_src_buf(ctx->m2m_ctx); >> + ret = scaler_prepare_addr(ctx, src_vb, s_frame, &s_frame->addr); >> + if (ret < 0) >> + return ret; >> + >> + dst_vb = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); >> + ret = scaler_prepare_addr(ctx, dst_vb, d_frame, &d_frame->addr); >> + if (ret < 0) >> + return ret; >> + >> + dst_vb->v4l2_buf.timestamp = src_vb->v4l2_buf.timestamp; >> + >> + return 0; >> +} >> + >> +static void scaler_m2m_device_run(void *priv) >> +{ >> + struct scaler_ctx *ctx = priv; >> + struct scaler_dev *scaler; >> + unsigned long flags; >> + int ret; >> + bool is_stopped; >> + >> + if (WARN(!ctx, "Null hardware context\n")) >> + return; >> + >> + scaler = ctx->scaler_dev; >> + spin_lock_irqsave(&scaler->slock, flags); >> + >> + set_bit(ST_M2M_PEND, &scaler->state); >> + >> + /* Reconfigure hardware if the context has changed. */ >> + if (scaler->m2m.ctx != ctx) { >> + scaler_dbg(scaler, "scaler->m2m.ctx = 0x%p, current_ctx = 0x%p", >> + scaler->m2m.ctx, ctx); >> + ctx->state |= SCALER_PARAMS; >> + scaler->m2m.ctx = ctx; >> + } >> + >> + is_stopped = ctx->state & SCALER_CTX_STOP_REQ; >> + ctx->state &= ~SCALER_CTX_STOP_REQ; >> + if (is_stopped) { >> + wake_up(&scaler->irq_queue); >> + goto unlock; >> + } >> + >> + ret = scaler_get_bufs(ctx); >> + if (ret < 0) { >> + scaler_dbg(scaler, "Wrong address\n"); >> + goto unlock; >> + } >> + >> + scaler_hw_address_queue_reset(ctx); >> + scaler_set_prefbuf(scaler, &ctx->s_frame); >> + scaler_hw_set_input_addr(scaler, &ctx->s_frame.addr); >> + scaler_hw_set_output_addr(scaler, &ctx->d_frame.addr); >> + scaler_hw_set_csc_coeff(ctx); >> + >> + if (ctx->state & SCALER_PARAMS) { >> + scaler_hw_set_irq(scaler, SCALER_INT_FRAME_END, false); >> + if (scaler_set_scaler_info(ctx)) { >> + scaler_dbg(scaler, "Scaler setup error"); >> + goto unlock; >> + } >> + >> + scaler_hw_set_in_size(ctx); >> + scaler_hw_set_in_image_format(ctx); >> + >> + scaler_hw_set_out_size(ctx); >> + scaler_hw_set_out_image_format(ctx); >> + >> + scaler_hw_set_scaler_ratio(ctx); >> + scaler_hw_set_rotation(ctx); >> + } >> + >> + ctx->state &= ~SCALER_PARAMS; >> + scaler_hw_enable_control(scaler, true); >> + >> + spin_unlock_irqrestore(&scaler->slock, flags); >> + return; >> + >> +unlock: >> + ctx->state &= ~SCALER_PARAMS; >> + spin_unlock_irqrestore(&scaler->slock, flags); >> +} >> + >> +static int scaler_m2m_queue_setup(struct vb2_queue *vq, >> + const struct v4l2_format *fmt, >> + unsigned int *num_buffers, unsigned int *num_planes, >> + unsigned int sizes[], void *allocators[]) >> +{ >> + struct scaler_ctx *ctx = vb2_get_drv_priv(vq); >> + struct scaler_frame *frame; >> + int i; >> + >> + frame = ctx_get_frame(ctx, vq->type); >> + if (IS_ERR(frame)) >> + return PTR_ERR(frame); >> + >> + if (!frame->fmt) >> + return -EINVAL; >> + >> + *num_planes = frame->fmt->num_planes; >> + for (i = 0; i < frame->fmt->num_planes; i++) { >> + sizes[i] = frame->payload[i]; >> + allocators[i] = ctx->scaler_dev->alloc_ctx; >> + } >> + return 0; >> +} >> + >> +static int scaler_m2m_buf_prepare(struct vb2_buffer *vb) >> +{ >> + struct scaler_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); >> + struct scaler_frame *frame; >> + int i; >> + >> + frame = ctx_get_frame(ctx, vb->vb2_queue->type); >> + if (IS_ERR(frame)) >> + return PTR_ERR(frame); >> + >> + for (i = 0; i < frame->fmt->num_planes; i++) >> + vb2_set_plane_payload(vb, i, frame->payload[i]); > > This sets the payload for buffers going to the hardware as well, > but it should check whether the payload is large enough instead. > I.e., if someone passes a buffer with too little data an error > should be returned. > >> + >> + return 0; >> +} >> + >> +static void scaler_m2m_buf_queue(struct vb2_buffer *vb) >> +{ >> + struct scaler_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); >> + >> + scaler_dbg(ctx->scaler_dev, "ctx: %p, ctx->state: 0x%x", >> + ctx, ctx->state); >> + >> + if (ctx->m2m_ctx) >> + v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); >> +} >> + >> +static void scaler_lock(struct vb2_queue *vq) >> +{ >> + struct scaler_ctx *ctx = vb2_get_drv_priv(vq); >> + mutex_lock(&ctx->scaler_dev->lock); >> +} >> + >> +static void scaler_unlock(struct vb2_queue *vq) >> +{ >> + struct scaler_ctx *ctx = vb2_get_drv_priv(vq); >> + mutex_unlock(&ctx->scaler_dev->lock); >> +} >> + >> +static struct vb2_ops scaler_m2m_qops = { >> + .queue_setup = scaler_m2m_queue_setup, >> + .buf_prepare = scaler_m2m_buf_prepare, >> + .buf_queue = scaler_m2m_buf_queue, >> + .wait_prepare = scaler_unlock, >> + .wait_finish = scaler_lock, >> + .stop_streaming = scaler_m2m_stop_streaming, >> + .start_streaming = scaler_m2m_start_streaming, >> +}; > > Have you tested this driver with the latest v4l2-compliance? > > Just run 'v4l2-compliance -s' and it should work. If you find problems > with v4l2-compliance itself, please let me know. It hasn't seen much > testing with m2m drivers, so feedback is welcome. > >> + >> +static int scaler_m2m_querycap(struct file *file, void *fh, >> + struct v4l2_capability *cap) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + struct scaler_dev *scaler = ctx->scaler_dev; >> + >> + cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE; >> + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; >> + >> + strlcpy(cap->driver, scaler->pdev->name, sizeof(cap->driver)); >> + strlcpy(cap->card, scaler->pdev->name, sizeof(cap->card)); >> + strlcpy(cap->bus_info, "platform:exynos5-scaler", >> + sizeof(cap->bus_info)); >> + >> + return 0; >> +} >> + >> +static int scaler_m2m_enum_fmt_mplane(struct file *file, void *priv, >> + struct v4l2_fmtdesc *f) >> +{ >> + return scaler_enum_fmt_mplane(f); >> +} >> + >> +static int scaler_m2m_g_fmt_mplane(struct file *file, void *fh, >> + struct v4l2_format *f) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + >> + return scaler_g_fmt_mplane(ctx, f); >> +} >> + >> +static int scaler_m2m_try_fmt_mplane(struct file *file, void *fh, >> + struct v4l2_format *f) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + >> + return scaler_try_fmt_mplane(ctx, f); >> +} >> + >> +static int scaler_m2m_set_default_format(struct scaler_ctx *ctx) >> +{ >> + struct scaler_frame *frame; >> + u32 def_pixformat = SCALER_DEF_PIX_FMT; >> + int i; >> + >> + frame = &ctx->s_frame; >> + >> + frame->colorspace = V4L2_COLORSPACE_REC709; >> + frame->fmt = scaler_find_fmt(&def_pixformat, -1); >> + if (!frame->fmt) >> + return -EINVAL; >> + >> + scaler_set_frame_size(frame, SCALER_DEF_WIDTH, SCALER_DEF_HEIGHT); >> + for (i = 0; i < frame->fmt->num_planes; i++) >> + frame->payload[i] = SCALER_DEF_WIDTH * SCALER_DEF_HEIGHT * >> + (frame->fmt->depth[i] / 8); >> + >> + scaler_ctx_state_lock_set(SCALER_PARAMS, ctx); >> + >> + /* Apply the same src frame settings to dst frame */ >> + ctx->d_frame = ctx->s_frame; >> + >> + return 0; >> +} >> + >> + >> +static int scaler_m2m_s_fmt_mplane(struct file *file, void *fh, >> + struct v4l2_format *f) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + struct vb2_queue *vq; >> + struct scaler_frame *frame; >> + struct v4l2_pix_format_mplane *pix; >> + int i, ret = 0; >> + >> + ret = scaler_m2m_try_fmt_mplane(file, fh, f); >> + if (ret < 0) >> + return ret; >> + >> + vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); >> + >> + if (vb2_is_streaming(vq)) { >> + scaler_dbg(ctx->scaler_dev, "queue (%d) busy", f->type); >> + return -EBUSY; >> + } >> + >> + if (V4L2_TYPE_IS_OUTPUT(f->type)) >> + frame = &ctx->s_frame; >> + else >> + frame = &ctx->d_frame; >> + >> + pix = &f->fmt.pix_mp; >> + frame->colorspace = pix->colorspace; >> + frame->fmt = scaler_find_fmt(&pix->pixelformat, -1); >> + if (!frame->fmt) >> + return -EINVAL; >> + >> + for (i = 0; i < frame->fmt->num_planes; i++) >> + frame->payload[i] = pix->plane_fmt[i].sizeimage; >> + >> + scaler_set_frame_size(frame, pix->width, pix->height); >> + scaler_ctx_state_lock_set(SCALER_PARAMS, ctx); >> + >> + scaler_dbg(ctx->scaler_dev, "f_w: %d, f_h: %d", >> + frame->f_width, frame->f_height); >> + >> + return 0; >> +} >> + >> +static int scaler_m2m_reqbufs(struct file *file, void *fh, >> + struct v4l2_requestbuffers *reqbufs) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + struct scaler_dev *scaler = ctx->scaler_dev; >> + u32 max_cnt; >> + >> + if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) >> + max_cnt = scaler->variant->in_buf_cnt; >> + else >> + max_cnt = scaler->variant->out_buf_cnt; >> + >> + if (reqbufs->count > max_cnt) { >> + /* Adjust the count value as per driver supports */ >> + reqbufs->count = max_cnt; >> + } >> + >> + return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); >> +} >> + >> +static int scaler_m2m_expbuf(struct file *file, void *fh, >> + struct v4l2_exportbuffer *eb) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + return v4l2_m2m_expbuf(file, ctx->m2m_ctx, eb); >> +} >> + >> +static int scaler_m2m_querybuf(struct file *file, void *fh, >> + struct v4l2_buffer *buf) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); >> +} >> + >> +static int scaler_m2m_qbuf(struct file *file, void *fh, >> + struct v4l2_buffer *buf) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); >> +} >> + >> +static int scaler_m2m_dqbuf(struct file *file, void *fh, >> + struct v4l2_buffer *buf) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); >> +} >> + >> +static int scaler_m2m_streamon(struct file *file, void *fh, >> + enum v4l2_buf_type type) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); >> +} >> + >> +static int scaler_m2m_streamoff(struct file *file, void *fh, >> + enum v4l2_buf_type type) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); >> +} > > v4l2-mem2mem.h defines a bunch of ioctl and file-operation helpers > that you can use directly rather than creating these small stubs. > > Just set the m2m_ctx field of the v4l2_fh struct to ctx->m2m_ctx > and you are good to go. This means that you need to do a 'container_of' > to go from the m2m_ctx to the scaler_ctx pointer. > >> + >> +/* Return 1 if rectangle a is enclosed in rectangle b, or 0 otherwise. */ >> +static int is_rectangle_enclosed(struct v4l2_rect *a, struct v4l2_rect *b) >> +{ >> + return !((a->left < b->left) || >> + (a->top < b->top) || >> + (a->left + a->width > b->left + b->width) || >> + (a->top + a->height > b->top + b->height)); >> +} >> + >> +static int scaler_m2m_g_selection(struct file *file, void *fh, >> + struct v4l2_selection *s) >> +{ >> + struct scaler_frame *frame; >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + >> + if ((s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) && >> + (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) >> + return -EINVAL; >> + >> + frame = ctx_get_frame(ctx, s->type); >> + if (IS_ERR(frame)) >> + return PTR_ERR(frame); >> + >> + if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { >> + if ((s->target == V4L2_SEL_TGT_CROP_DEFAULT) || >> + (s->target == V4L2_SEL_TGT_CROP_BOUNDS)) { >> + s->r.left = 0; >> + s->r.top = 0; >> + s->r.width = frame->f_width; >> + s->r.height = frame->f_height; >> + return 0; >> + } >> + >> + if (s->target == V4L2_SEL_TGT_CROP) { >> + s->r.left = frame->selection.left; >> + s->r.top = frame->selection.top; >> + s->r.width = frame->selection.width; >> + s->r.height = frame->selection.height; >> + return 0; >> + } >> + } else { >> + if ((s->target == V4L2_SEL_TGT_COMPOSE_DEFAULT) || >> + (s->target == V4L2_SEL_TGT_COMPOSE_BOUNDS)) { >> + s->r.left = 0; >> + s->r.top = 0; >> + s->r.width = frame->f_width; >> + s->r.height = frame->f_height; >> + return 0; >> + } >> + >> + if (s->target == V4L2_SEL_TGT_COMPOSE) { >> + s->r.left = frame->selection.left; >> + s->r.top = frame->selection.top; >> + s->r.width = frame->selection.width; >> + s->r.height = frame->selection.height; >> + return 0; >> + } >> + } >> + >> + return -EINVAL; >> +} >> + >> +static int scaler_m2m_s_selection(struct file *file, void *fh, >> + struct v4l2_selection *s) >> +{ >> + struct scaler_frame *frame; >> + struct scaler_ctx *ctx = fh_to_ctx(fh); >> + struct v4l2_crop cr; >> + struct scaler_variant *variant = ctx->scaler_dev->variant; >> + int ret; >> + >> + cr.type = s->type; >> + cr.c = s->r; >> + >> + if (!(((s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) && >> + (s->target == V4L2_SEL_TGT_CROP)) || >> + ((s->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) && >> + (s->target == V4L2_SEL_TGT_COMPOSE)))) >> + return -EINVAL; >> + >> + frame = ctx_get_frame(ctx, s->type); >> + >> + ret = scaler_try_crop(ctx, &cr); >> + if (ret < 0) >> + return ret; >> + >> + if (s->flags & V4L2_SEL_FLAG_LE && >> + !is_rectangle_enclosed(&cr.c, &s->r)) >> + return -ERANGE; >> + >> + if (s->flags & V4L2_SEL_FLAG_GE && >> + !is_rectangle_enclosed(&s->r, &cr.c)) >> + return -ERANGE; >> + >> + s->r = cr.c; >> + >> + /* Check to see if scaling ratio is within supported range */ >> + if (s->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) >> + ret = scaler_check_scaler_ratio(variant, >> + cr.c.width, cr.c.height, >> + ctx->d_frame.selection.width, >> + ctx->d_frame.selection.height, >> + ctx->ctrls_scaler.rotate->val); >> + else >> + ret = scaler_check_scaler_ratio(variant, >> + ctx->s_frame.selection.width, >> + ctx->s_frame.selection.height, >> + cr.c.width, cr.c.height, >> + ctx->ctrls_scaler.rotate->val); >> + >> + if (ret < 0) { >> + scaler_dbg(ctx->scaler_dev, "Out of scaler range"); >> + return -EINVAL; >> + } >> + >> + frame->selection = cr.c; >> + >> + scaler_ctx_state_lock_set(SCALER_PARAMS, ctx); >> + return 0; >> +} >> + >> +static const struct v4l2_ioctl_ops scaler_m2m_ioctl_ops = { >> + .vidioc_querycap = scaler_m2m_querycap, >> + .vidioc_enum_fmt_vid_cap_mplane = scaler_m2m_enum_fmt_mplane, >> + .vidioc_enum_fmt_vid_out_mplane = scaler_m2m_enum_fmt_mplane, >> + .vidioc_g_fmt_vid_cap_mplane = scaler_m2m_g_fmt_mplane, >> + .vidioc_g_fmt_vid_out_mplane = scaler_m2m_g_fmt_mplane, >> + .vidioc_try_fmt_vid_cap_mplane = scaler_m2m_try_fmt_mplane, >> + .vidioc_try_fmt_vid_out_mplane = scaler_m2m_try_fmt_mplane, >> + .vidioc_s_fmt_vid_cap_mplane = scaler_m2m_s_fmt_mplane, >> + .vidioc_s_fmt_vid_out_mplane = scaler_m2m_s_fmt_mplane, >> + .vidioc_reqbufs = scaler_m2m_reqbufs, >> + .vidioc_expbuf = scaler_m2m_expbuf, >> + .vidioc_querybuf = scaler_m2m_querybuf, >> + .vidioc_qbuf = scaler_m2m_qbuf, >> + .vidioc_dqbuf = scaler_m2m_dqbuf, >> + .vidioc_streamon = scaler_m2m_streamon, >> + .vidioc_streamoff = scaler_m2m_streamoff, >> + .vidioc_g_selection = scaler_m2m_g_selection, >> + .vidioc_s_selection = scaler_m2m_s_selection >> +}; >> + >> +static int queue_init(void *priv, struct vb2_queue *src_vq, >> + struct vb2_queue *dst_vq) >> +{ >> + struct scaler_ctx *ctx = priv; >> + int ret; >> + >> + memset(src_vq, 0, sizeof(*src_vq)); >> + src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE; >> + src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; >> + src_vq->drv_priv = ctx; >> + src_vq->ops = &scaler_m2m_qops; >> + src_vq->mem_ops = &vb2_dma_contig_memops; >> + src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); >> + >> + ret = vb2_queue_init(src_vq); >> + if (ret < 0) >> + return ret; >> + >> + memset(dst_vq, 0, sizeof(*dst_vq)); >> + dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; >> + dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF; >> + dst_vq->drv_priv = ctx; >> + dst_vq->ops = &scaler_m2m_qops; >> + dst_vq->mem_ops = &vb2_dma_contig_memops; >> + dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); >> + >> + return vb2_queue_init(dst_vq); >> +} >> + >> +static int scaler_m2m_open(struct file *file) >> +{ >> + struct scaler_dev *scaler = video_drvdata(file); >> + struct scaler_ctx *ctx = NULL; >> + int ret; >> + >> + scaler_dbg(scaler, "pid: %d, state: 0x%lx", >> + task_pid_nr(current), scaler->state); >> + >> + if (mutex_lock_interruptible(&scaler->lock)) >> + return -ERESTARTSYS; >> + >> + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); >> + if (!ctx) { >> + ret = -ENOMEM; >> + goto unlock; >> + } >> + >> + v4l2_fh_init(&ctx->fh, scaler->m2m.vfd); >> + ret = scaler_ctrls_create(ctx); >> + if (ret < 0) >> + goto error_fh; >> + >> + /* Use separate control handler per file handle */ >> + ctx->fh.ctrl_handler = &ctx->ctrl_handler; >> + file->private_data = &ctx->fh; >> + v4l2_fh_add(&ctx->fh); >> + >> + ctx->scaler_dev = scaler; >> + /* Default color format */ >> + ctx->s_frame.fmt = scaler_get_format(0); >> + ctx->d_frame.fmt = scaler_get_format(0); >> + ctx->flags = 0; >> + >> + ctx->m2m_ctx = v4l2_m2m_ctx_init(scaler->m2m.m2m_dev, ctx, queue_init); >> + if (IS_ERR(ctx->m2m_ctx)) { >> + scaler_dbg(scaler, "Failed to initialize m2m context"); >> + ret = PTR_ERR(ctx->m2m_ctx); >> + goto error_ctrls; >> + } >> + >> + /* Apply default format settings */ >> + ret = scaler_m2m_set_default_format(ctx); >> + if (ret < 0) { >> + scaler_dbg(scaler, "Failed to set default format settings"); >> + goto error_ctrls; >> + } >> + >> + if (v4l2_fh_is_singular_file(file)) >> + set_bit(ST_M2M_OPEN, &scaler->state); >> + >> + scaler_dbg(scaler, "scaler m2m driver is opened, ctx(0x%p)", ctx); >> + >> + mutex_unlock(&scaler->lock); >> + return 0; >> + >> +error_ctrls: >> + scaler_ctrls_delete(ctx); >> +error_fh: >> + v4l2_fh_del(&ctx->fh); >> + v4l2_fh_exit(&ctx->fh); >> + kfree(ctx); >> +unlock: >> + mutex_unlock(&scaler->lock); >> + return ret; >> +} >> + >> +static int scaler_m2m_release(struct file *file) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(file->private_data); >> + struct scaler_dev *scaler = ctx->scaler_dev; >> + >> + scaler_dbg(scaler, "pid: %d, state: 0x%lx", >> + task_pid_nr(current), scaler->state); >> + >> + mutex_lock(&scaler->lock); >> + >> + if (v4l2_fh_is_singular_file(file)) >> + clear_bit(ST_M2M_OPEN, &scaler->state); >> + >> + v4l2_m2m_ctx_release(ctx->m2m_ctx); >> + scaler_ctrls_delete(ctx); >> + v4l2_fh_del(&ctx->fh); >> + v4l2_fh_exit(&ctx->fh); >> + >> + kfree(ctx); >> + >> + mutex_unlock(&scaler->lock); >> + return 0; >> +} >> + >> +static unsigned int scaler_m2m_poll(struct file *file, >> + struct poll_table_struct *wait) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(file->private_data); >> + struct scaler_dev *scaler = ctx->scaler_dev; >> + int ret; >> + >> + if (mutex_lock_interruptible(&scaler->lock)) >> + return -ERESTARTSYS; >> + >> + ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait); >> + mutex_unlock(&scaler->lock); >> + >> + return ret; >> +} >> + >> +static int scaler_m2m_mmap(struct file *file, struct vm_area_struct *vma) >> +{ >> + struct scaler_ctx *ctx = fh_to_ctx(file->private_data); >> + struct scaler_dev *scaler = ctx->scaler_dev; >> + int ret; >> + >> + if (mutex_lock_interruptible(&scaler->lock)) >> + return -ERESTARTSYS; >> + >> + ret = v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); >> + mutex_unlock(&scaler->lock); >> + >> + return ret; >> +} >> + >> +static const struct v4l2_file_operations scaler_m2m_fops = { >> + .owner = THIS_MODULE, >> + .open = scaler_m2m_open, >> + .release = scaler_m2m_release, >> + .poll = scaler_m2m_poll, >> + .unlocked_ioctl = video_ioctl2, >> + .mmap = scaler_m2m_mmap, >> +}; >> + >> +static struct v4l2_m2m_ops scaler_m2m_ops = { >> + .device_run = scaler_m2m_device_run, >> + .job_abort = scaler_m2m_job_abort, >> +}; >> + >> +int scaler_register_m2m_device(struct scaler_dev *scaler) >> +{ >> + struct platform_device *pdev; >> + int ret; >> + >> + if (!scaler) >> + return -ENODEV; >> + >> + pdev = scaler->pdev; >> + >> + scaler->vdev.fops = &scaler_m2m_fops; >> + scaler->vdev.ioctl_ops = &scaler_m2m_ioctl_ops; >> + scaler->vdev.release = video_device_release_empty; >> + scaler->vdev.lock = &scaler->lock; >> + scaler->vdev.vfl_dir = VFL_DIR_M2M; >> + scaler->vdev.v4l2_dev = &scaler->v4l2_dev; >> + snprintf(scaler->vdev.name, sizeof(scaler->vdev.name), "%s:m2m", >> + SCALER_MODULE_NAME); >> + >> + video_set_drvdata(&scaler->vdev, scaler); >> + >> + scaler->m2m.vfd = &scaler->vdev; >> + scaler->m2m.m2m_dev = v4l2_m2m_init(&scaler_m2m_ops); >> + if (IS_ERR(scaler->m2m.m2m_dev)) { >> + dev_err(&pdev->dev, "failed to initialize v4l2-m2m device\n"); >> + return PTR_ERR(scaler->m2m.m2m_dev); >> + } >> + >> + ret = video_register_device(&scaler->vdev, VFL_TYPE_GRABBER, -1); >> + if (ret < 0) { >> + dev_err(&pdev->dev, >> + "%s(): failed to register video device\n", __func__); >> + v4l2_m2m_release(scaler->m2m.m2m_dev); >> + return ret; >> + } >> + >> + dev_info(&pdev->dev, "scaler m2m driver registered as /dev/video%d", >> + scaler->vdev.num); >> + return 0; >> +} >> + >> +void scaler_unregister_m2m_device(struct scaler_dev *scaler) >> +{ >> + if (scaler) { >> + video_unregister_device(scaler->m2m.vfd); >> + v4l2_m2m_release(scaler->m2m.m2m_dev); >> + } >> +} >> > > Regards, > > Hans > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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