--- /dev/null
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Authors: Hugues Fruchet <hugues.fruchet@st.com>
+ * Jean-Christophe Trotin <jean-christophe.trotin@st.com>
+ * for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "delta.h"
+
+#define DELTA_NAME "st-delta"
+
+#define DELTA_PREFIX "[---:----]"
+
+#define to_ctx(__fh) container_of(__fh, struct delta_ctx, fh)
+#define to_au(__vbuf) container_of(__vbuf, struct delta_au, vbuf)
+#define to_frame(__vbuf) container_of(__vbuf, struct delta_frame, vbuf)
+
+#define call_dec_op(dec, op, args...)\
+ ((dec && (dec)->op) ? (dec)->op(args) : 0)
+
+/* registry of available decoders */
+static const struct delta_dec *delta_decoders[] = {
+};
+
+static inline int frame_size(u32 w, u32 h, u32 fmt)
+{
+ switch (fmt) {
+ case V4L2_PIX_FMT_NV12:
+ return (w * h * 3) / 2;
+ default:
+ return 0;
+ }
+}
+
+static inline int frame_stride(u32 w, u32 fmt)
+{
+ switch (fmt) {
+ case V4L2_PIX_FMT_NV12:
+ return w;
+ default:
+ return 0;
+ }
+}
+
+static void dump_au(struct delta_ctx *ctx, struct delta_au *au)
+{
+ struct delta_dev *delta = ctx->dev;
+ u32 size = 10; /* dump first & last 10 bytes */
+ u8 *data = (u8 *)(au->vaddr);
+
+ if (au->size <= (size * 2))
+ dev_dbg(delta->dev, "%s dump au[%d] dts=%lld size=%d data=%*ph\n",
+ ctx->name, au->vbuf.vb2_buf.index, au->dts, au->size,
+ au->size, data);
+ else
+ dev_dbg(delta->dev, "%s dump au[%d] dts=%lld size=%d data=%*ph..%*ph\n",
+ ctx->name, au->vbuf.vb2_buf.index, au->dts, au->size,
+ size, data, size, data + au->size - size);
+}
+
+static void dump_frame(struct delta_ctx *ctx, struct delta_frame *frame)
+{
+ struct delta_dev *delta = ctx->dev;
+ u32 size = 10; /* dump first 10 bytes */
+ u8 *data = (u8 *)(frame->vaddr);
+
+ dev_dbg(delta->dev, "%s dump frame[%d] dts=%lld type=%s field=%s data=%*ph\n",
+ ctx->name, frame->index, frame->dts,
+ frame_type_str(frame->flags),
+ frame_field_str(frame->field),
+ size, data);
+}
+
+static void delta_au_done(struct delta_ctx *ctx, struct delta_au *au, int err)
+{
+ struct vb2_v4l2_buffer *vbuf;
+
+ vbuf = &au->vbuf;
+ vbuf->sequence = ctx->au_num++;
+ v4l2_m2m_buf_done(vbuf, err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
+}
+
+static void delta_frame_done(struct delta_ctx *ctx, struct delta_frame *frame,
+ int err)
+{
+ struct vb2_v4l2_buffer *vbuf;
+
+ dump_frame(ctx, frame);
+
+ /* decoded frame is now output to user */
+ frame->state |= DELTA_FRAME_OUT;
+
+ vbuf = &frame->vbuf;
+ vbuf->sequence = ctx->frame_num++;
+ v4l2_m2m_buf_done(vbuf, err ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
+
+ ctx->output_frames++;
+}
+
+static void requeue_free_frames(struct delta_ctx *ctx)
+{
+ struct vb2_v4l2_buffer *vbuf;
+ struct delta_frame *frame;
+ unsigned int i;
+
+ /* requeue all free frames */
+ for (i = 0; i < ctx->nb_of_frames; i++) {
+ frame = ctx->frames[i];
+ if (frame->state == DELTA_FRAME_FREE) {
+ vbuf = &frame->vbuf;
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+ frame->state = DELTA_FRAME_M2M;
+ }
+ }
+}
+
+static int delta_recycle(struct delta_ctx *ctx, struct delta_frame *frame)
+{
+ const struct delta_dec *dec = ctx->dec;
+
+ /* recycle frame on decoder side */
+ call_dec_op(dec, recycle, ctx, frame);
+
+ /* this frame is no more output */
+ frame->state &= ~DELTA_FRAME_OUT;
+
+ /* requeue free frame */
+ if (frame->state == DELTA_FRAME_FREE) {
+ struct vb2_v4l2_buffer *vbuf = &frame->vbuf;
+
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+ frame->state = DELTA_FRAME_M2M;
+ }
+
+ /* reset other frame fields */
+ frame->flags = 0;
+ frame->dts = 0;
+
+ return 0;
+}
+
+static void delta_push_dts(struct delta_ctx *ctx, u64 val)
+{
+ struct delta_dts *dts;
+
+ dts = kzalloc(sizeof(*dts), GFP_KERNEL);
+ if (!dts)
+ return;
+
+ INIT_LIST_HEAD(&dts->list);
+
+ /*
+ * protected by global lock acquired
+ * by V4L2 when calling delta_vb2_au_queue
+ */
+ dts->val = val;
+ list_add_tail(&dts->list, &ctx->dts);
+}
+
+static void delta_pop_dts(struct delta_ctx *ctx, u64 *val)
+{
+ struct delta_dev *delta = ctx->dev;
+ struct delta_dts *dts;
+
+ /*
+ * protected by global lock acquired
+ * by V4L2 when calling delta_vb2_au_queue
+ */
+ if (list_empty(&ctx->dts)) {
+ dev_warn(delta->dev, "%s no dts to pop ... output dts = 0\n",
+ ctx->name);
+ *val = 0;
+ return;
+ }
+
+ dts = list_first_entry(&ctx->dts, struct delta_dts, list);
+ list_del(&dts->list);
+
+ *val = dts->val;
+
+ kfree(dts);
+}
+
+static void delta_flush_dts(struct delta_ctx *ctx)
+{
+ struct delta_dts *dts;
+ struct delta_dts *next;
+
+ /*
+ * protected by global lock acquired
+ * by V4L2 when calling delta_vb2_au_queue
+ */
+
+ /* free all pending dts */
+ list_for_each_entry_safe(dts, next, &ctx->dts, list)
+ kfree(dts);
+
+ /* reset list */
+ INIT_LIST_HEAD(&ctx->dts);
+}
+
+static inline int frame_alignment(u32 fmt)
+{
+ switch (fmt) {
+ case V4L2_PIX_FMT_NV12:
+ case V4L2_PIX_FMT_NV21:
+ /* multiple of 2 */
+ return 2;
+ default:
+ return 1;
+ }
+}
+
+static inline int estimated_au_size(u32 w, u32 h)
+{
+ /*
+ * for a MJPEG stream encoded from YUV422 pixel format,
+ * assuming a compression ratio of 2, the maximum size
+ * of an access unit is (width x height x 2) / 2,
+ * so (width x height)
+ */
+ return (w * h);
+}
+
+static void set_default_params(struct delta_ctx *ctx)
+{
+ struct delta_frameinfo *frameinfo = &ctx->frameinfo;
+ struct delta_streaminfo *streaminfo = &ctx->streaminfo;
+
+ memset(frameinfo, 0, sizeof(*frameinfo));
+ frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
+ frameinfo->width = DELTA_DEFAULT_WIDTH;
+ frameinfo->height = DELTA_DEFAULT_HEIGHT;
+ frameinfo->aligned_width = ALIGN(frameinfo->width,
+ DELTA_WIDTH_ALIGNMENT);
+ frameinfo->aligned_height = ALIGN(frameinfo->height,
+ DELTA_HEIGHT_ALIGNMENT);
+ frameinfo->size = frame_size(frameinfo->aligned_width,
+ frameinfo->aligned_height,
+ frameinfo->pixelformat);
+ frameinfo->field = V4L2_FIELD_NONE;
+ frameinfo->colorspace = V4L2_COLORSPACE_REC709;
+ frameinfo->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ frameinfo->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ frameinfo->quantization = V4L2_QUANTIZATION_DEFAULT;
+
+ memset(streaminfo, 0, sizeof(*streaminfo));
+ streaminfo->streamformat = DELTA_DEFAULT_STREAMFORMAT;
+ streaminfo->width = DELTA_DEFAULT_WIDTH;
+ streaminfo->height = DELTA_DEFAULT_HEIGHT;
+ streaminfo->field = V4L2_FIELD_NONE;
+ streaminfo->colorspace = V4L2_COLORSPACE_REC709;
+ streaminfo->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ streaminfo->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ streaminfo->quantization = V4L2_QUANTIZATION_DEFAULT;
+
+ ctx->max_au_size = estimated_au_size(streaminfo->width,
+ streaminfo->height);
+}
+
+static const struct delta_dec *delta_find_decoder(struct delta_ctx *ctx,
+ u32 streamformat,
+ u32 pixelformat)
+{
+ struct delta_dev *delta = ctx->dev;
+ const struct delta_dec *dec;
+ unsigned int i;
+
+ for (i = 0; i < delta->nb_of_decoders; i++) {
+ dec = delta->decoders[i];
+ if ((dec->pixelformat == pixelformat) &&
+ (dec->streamformat == streamformat))
+ return dec;
+ }
+
+ return NULL;
+}
+
+static void register_format(u32 format, u32 formats[], u32 *nb_of_formats)
+{
+ u32 i;
+
+ for (i = 0; i < *nb_of_formats; i++) {
+ if (format == formats[i])
+ return;
+ }
+
+ formats[(*nb_of_formats)++] = format;
+}
+
+static void register_formats(struct delta_dev *delta)
+{
+ unsigned int i;
+
+ for (i = 0; i < delta->nb_of_decoders; i++) {
+ register_format(delta->decoders[i]->pixelformat,
+ delta->pixelformats,
+ &delta->nb_of_pixelformats);
+
+ register_format(delta->decoders[i]->streamformat,
+ delta->streamformats,
+ &delta->nb_of_streamformats);
+ }
+}
+
+static void register_decoders(struct delta_dev *delta)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(delta_decoders); i++) {
+ if (delta->nb_of_decoders >= DELTA_MAX_DECODERS) {
+ dev_dbg(delta->dev,
+ "%s failed to register %s decoder (%d maximum reached)\n",
+ DELTA_PREFIX, delta_decoders[i]->name,
+ DELTA_MAX_DECODERS);
+ return;
+ }
+
+ delta->decoders[delta->nb_of_decoders++] = delta_decoders[i];
+ dev_info(delta->dev, "%s %s decoder registered\n",
+ DELTA_PREFIX, delta_decoders[i]->name);
+ }
+}
+
+static void delta_lock(void *priv)
+{
+ struct delta_ctx *ctx = priv;
+ struct delta_dev *delta = ctx->dev;
+
+ mutex_lock(&delta->lock);
+}
+
+static void delta_unlock(void *priv)
+{
+ struct delta_ctx *ctx = priv;
+ struct delta_dev *delta = ctx->dev;
+
+ mutex_unlock(&delta->lock);
+}
+
+static int delta_open_decoder(struct delta_ctx *ctx, u32 streamformat,
+ u32 pixelformat, const struct delta_dec **pdec)
+{
+ struct delta_dev *delta = ctx->dev;
+ const struct delta_dec *dec;
+ int ret;
+
+ dec = delta_find_decoder(ctx, streamformat, ctx->frameinfo.pixelformat);
+ if (!dec) {
+ dev_err(delta->dev, "%s no decoder found matching %4.4s => %4.4s\n",
+ ctx->name, (char *)&streamformat, (char *)&pixelformat);
+ return -EINVAL;
+ }
+
+ dev_dbg(delta->dev, "%s one decoder matching %4.4s => %4.4s\n",
+ ctx->name, (char *)&streamformat, (char *)&pixelformat);
+
+ /* update instance name */
+ snprintf(ctx->name, sizeof(ctx->name), "[%3d:%4.4s]",
+ delta->instance_id, (char *)&streamformat);
+
+ /* open decoder instance */
+ ret = call_dec_op(dec, open, ctx);
+ if (ret) {
+ dev_err(delta->dev, "%s failed to open decoder instance (%d)\n",
+ ctx->name, ret);
+ return ret;
+ }
+
+ dev_dbg(delta->dev, "%s %s decoder opened\n", ctx->name, dec->name);
+
+ *pdec = dec;
+
+ return ret;
+}
+
+/*
+ * V4L2 ioctl operations
+ */
+
+static int delta_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+
+ strlcpy(cap->driver, DELTA_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, delta->vdev->name, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
+ delta->pdev->name);
+
+ return 0;
+}
+
+static int delta_enum_fmt_stream(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+
+ if (unlikely(f->index >= delta->nb_of_streamformats))
+ return -EINVAL;
+
+ f->pixelformat = delta->streamformats[f->index];
+
+ return 0;
+}
+
+static int delta_enum_fmt_frame(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+
+ if (unlikely(f->index >= delta->nb_of_pixelformats))
+ return -EINVAL;
+
+ f->pixelformat = delta->pixelformats[f->index];
+
+ return 0;
+}
+
+static int delta_g_fmt_stream(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct delta_streaminfo *streaminfo = &ctx->streaminfo;
+
+ if (!(ctx->flags & DELTA_FLAG_STREAMINFO))
+ dev_dbg(delta->dev,
+ "%s V4L2 GET_FMT (OUTPUT): no stream information available, using default\n",
+ ctx->name);
+
+ pix->pixelformat = streaminfo->streamformat;
+ pix->width = streaminfo->width;
+ pix->height = streaminfo->height;
+ pix->field = streaminfo->field;
+ pix->bytesperline = 0;
+ pix->sizeimage = ctx->max_au_size;
+ pix->colorspace = streaminfo->colorspace;
+ pix->xfer_func = streaminfo->xfer_func;
+ pix->ycbcr_enc = streaminfo->ycbcr_enc;
+ pix->quantization = streaminfo->quantization;
+
+ return 0;
+}
+
+static int delta_g_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct delta_frameinfo *frameinfo = &ctx->frameinfo;
+ struct delta_streaminfo *streaminfo = &ctx->streaminfo;
+
+ if (!(ctx->flags & DELTA_FLAG_FRAMEINFO))
+ dev_dbg(delta->dev,
+ "%s V4L2 GET_FMT (CAPTURE): no frame information available, using default\n",
+ ctx->name);
+
+ pix->pixelformat = frameinfo->pixelformat;
+ pix->width = frameinfo->aligned_width;
+ pix->height = frameinfo->aligned_height;
+ pix->field = frameinfo->field;
+ pix->bytesperline = frame_stride(frameinfo->aligned_width,
+ frameinfo->pixelformat);
+ pix->sizeimage = frameinfo->size;
+
+ if (ctx->flags & DELTA_FLAG_STREAMINFO) {
+ /* align colorspace & friends on stream ones if any set */
+ frameinfo->colorspace = streaminfo->colorspace;
+ frameinfo->xfer_func = streaminfo->xfer_func;
+ frameinfo->ycbcr_enc = streaminfo->ycbcr_enc;
+ frameinfo->quantization = streaminfo->quantization;
+ }
+ pix->colorspace = frameinfo->colorspace;
+ pix->xfer_func = frameinfo->xfer_func;
+ pix->ycbcr_enc = frameinfo->ycbcr_enc;
+ pix->quantization = frameinfo->quantization;
+
+ return 0;
+}
+
+static int delta_try_fmt_stream(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ u32 streamformat = pix->pixelformat;
+ const struct delta_dec *dec;
+ u32 width, height;
+ u32 au_size;
+
+ dec = delta_find_decoder(ctx, streamformat, ctx->frameinfo.pixelformat);
+ if (!dec) {
+ dev_dbg(delta->dev,
+ "%s V4L2 TRY_FMT (OUTPUT): unsupported format %4.4s\n",
+ ctx->name, (char *)&pix->pixelformat);
+ return -EINVAL;
+ }
+
+ /* adjust width & height */
+ width = pix->width;
+ height = pix->height;
+ v4l_bound_align_image
+ (&pix->width,
+ DELTA_MIN_WIDTH,
+ dec->max_width ? dec->max_width : DELTA_MAX_WIDTH,
+ 0,
+ &pix->height,
+ DELTA_MIN_HEIGHT,
+ dec->max_height ? dec->max_height : DELTA_MAX_HEIGHT,
+ 0, 0);
+
+ if ((pix->width != width) || (pix->height != height))
+ dev_dbg(delta->dev,
+ "%s V4L2 TRY_FMT (OUTPUT): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
+ ctx->name, width, height,
+ pix->width, pix->height);
+
+ au_size = estimated_au_size(pix->width, pix->height);
+ if (pix->sizeimage < au_size) {
+ dev_dbg(delta->dev,
+ "%s V4L2 TRY_FMT (OUTPUT): size updated %d -> %d to fit estimated size\n",
+ ctx->name, pix->sizeimage, au_size);
+ pix->sizeimage = au_size;
+ }
+
+ pix->bytesperline = 0;
+
+ if (pix->field == V4L2_FIELD_ANY)
+ pix->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int delta_try_fmt_frame(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ u32 pixelformat = pix->pixelformat;
+ const struct delta_dec *dec;
+ u32 width, height;
+
+ dec = delta_find_decoder(ctx, ctx->streaminfo.streamformat,
+ pixelformat);
+ if (!dec) {
+ dev_dbg(delta->dev,
+ "%s V4L2 TRY_FMT (CAPTURE): unsupported format %4.4s\n",
+ ctx->name, (char *)&pixelformat);
+ return -EINVAL;
+ }
+
+ /* adjust width & height */
+ width = pix->width;
+ height = pix->height;
+ v4l_bound_align_image(&pix->width,
+ DELTA_MIN_WIDTH, DELTA_MAX_WIDTH,
+ frame_alignment(pixelformat) - 1,
+ &pix->height,
+ DELTA_MIN_HEIGHT, DELTA_MAX_HEIGHT,
+ frame_alignment(pixelformat) - 1, 0);
+
+ if ((pix->width != width) || (pix->height != height))
+ dev_dbg(delta->dev,
+ "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit min/max/alignment\n",
+ ctx->name, width, height, pix->width, pix->height);
+
+ /* default decoder alignment constraint */
+ width = ALIGN(pix->width, DELTA_WIDTH_ALIGNMENT);
+ height = ALIGN(pix->height, DELTA_HEIGHT_ALIGNMENT);
+ if ((pix->width != width) || (pix->height != height))
+ dev_dbg(delta->dev,
+ "%s V4L2 TRY_FMT (CAPTURE): resolution updated %dx%d -> %dx%d to fit decoder alignment\n",
+ ctx->name, width, height, pix->width, pix->height);
+
+ if (!pix->colorspace) {
+ pix->colorspace = V4L2_COLORSPACE_REC709;
+ pix->xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ pix->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ pix->quantization = V4L2_QUANTIZATION_DEFAULT;
+ }
+
+ pix->width = width;
+ pix->height = height;
+ pix->bytesperline = frame_stride(pix->width, pixelformat);
+ pix->sizeimage = frame_size(pix->width, pix->height, pixelformat);
+
+ if (pix->field == V4L2_FIELD_ANY)
+ pix->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int delta_s_fmt_stream(struct file *file, void *fh,
+ struct v4l2_format *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+ struct vb2_queue *vq;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ int ret;
+
+ ret = delta_try_fmt_stream(file, fh, f);
+ if (ret) {
+ dev_dbg(delta->dev,
+ "%s V4L2 S_FMT (OUTPUT): unsupported format %4.4s\n",
+ ctx->name, (char *)&pix->pixelformat);
+ return ret;
+ }
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (vb2_is_streaming(vq)) {
+ dev_dbg(delta->dev, "%s V4L2 S_FMT (OUTPUT): queue busy\n",
+ ctx->name);
+ return -EBUSY;
+ }
+
+ ctx->max_au_size = pix->sizeimage;
+ ctx->streaminfo.width = pix->width;
+ ctx->streaminfo.height = pix->height;
+ ctx->streaminfo.streamformat = pix->pixelformat;
+ ctx->streaminfo.colorspace = pix->colorspace;
+ ctx->streaminfo.xfer_func = pix->xfer_func;
+ ctx->streaminfo.ycbcr_enc = pix->ycbcr_enc;
+ ctx->streaminfo.quantization = pix->quantization;
+ ctx->flags |= DELTA_FLAG_STREAMINFO;
+
+ return 0;
+}
+
+static int delta_s_fmt_frame(struct file *file, void *fh, struct v4l2_format *f)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+ const struct delta_dec *dec = ctx->dec;
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct delta_frameinfo frameinfo;
+ struct vb2_queue *vq;
+ int ret;
+
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
+ if (vb2_is_streaming(vq)) {
+ dev_dbg(delta->dev, "%s V4L2 S_FMT (CAPTURE): queue busy\n",
+ ctx->name);
+ return -EBUSY;
+ }
+
+ if (ctx->state < DELTA_STATE_READY) {
+ /*
+ * decoder not yet opened and valid stream header not found,
+ * could not negotiate format with decoder, check at least
+ * pixel format & negotiate resolution boundaries
+ * and alignment...
+ */
+ ret = delta_try_fmt_frame(file, fh, f);
+ if (ret) {
+ dev_dbg(delta->dev,
+ "%s V4L2 S_FMT (CAPTURE): unsupported format %4.4s\n",
+ ctx->name, (char *)&pix->pixelformat);
+ return ret;
+ }
+
+ return 0;
+ }
+
+ /* set frame information to decoder */
+ memset(&frameinfo, 0, sizeof(frameinfo));
+ frameinfo.pixelformat = pix->pixelformat;
+ frameinfo.width = pix->width;
+ frameinfo.height = pix->height;
+ frameinfo.aligned_width = pix->width;
+ frameinfo.aligned_height = pix->height;
+ frameinfo.size = pix->sizeimage;
+ frameinfo.field = pix->field;
+ frameinfo.colorspace = pix->colorspace;
+ frameinfo.xfer_func = pix->xfer_func;
+ frameinfo.ycbcr_enc = pix->ycbcr_enc;
+ frameinfo.quantization = pix->quantization;
+ ret = call_dec_op(dec, set_frameinfo, ctx, &frameinfo);
+ if (ret)
+ return ret;
+
+ /* then get what decoder can really do */
+ ret = call_dec_op(dec, get_frameinfo, ctx, &frameinfo);
+ if (ret)
+ return ret;
+
+ ctx->flags |= DELTA_FLAG_FRAMEINFO;
+ ctx->frameinfo = frameinfo;
+
+ pix->pixelformat = frameinfo.pixelformat;
+ pix->width = frameinfo.aligned_width;
+ pix->height = frameinfo.aligned_height;
+ pix->bytesperline = frame_stride(pix->width, pix->pixelformat);
+ pix->sizeimage = frameinfo.size;
+ pix->field = frameinfo.field;
+ pix->colorspace = frameinfo.colorspace;
+ pix->xfer_func = frameinfo.xfer_func;
+ pix->ycbcr_enc = frameinfo.ycbcr_enc;
+ pix->quantization = frameinfo.quantization;
+
+ return 0;
+}
+
+static int delta_g_selection(struct file *file, void *fh,
+ struct v4l2_selection *s)
+{
+ struct delta_ctx *ctx = to_ctx(fh);
+ struct delta_frameinfo *frameinfo = &ctx->frameinfo;
+ struct v4l2_rect crop;
+
+ if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if ((ctx->flags & DELTA_FLAG_FRAMEINFO) &&
+ (frameinfo->flags & DELTA_FRAMEINFO_FLAG_CROP)) {
+ crop = frameinfo->crop;
+ } else {
+ /* default to video dimensions */
+ crop.left = 0;
+ crop.top = 0;
+ crop.width = frameinfo->width;
+ crop.height = frameinfo->height;
+ }
+
+ switch (s->target) {
+ case V4L2_SEL_TGT_COMPOSE:
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ /* visible area inside video */
+ s->r = crop;
+ break;
+ case V4L2_SEL_TGT_COMPOSE_PADDED:
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ /* up to aligned dimensions */
+ s->r.left = 0;
+ s->r.top = 0;
+ s->r.width = frameinfo->aligned_width;
+ s->r.height = frameinfo->aligned_height;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* v4l2 ioctl ops */
+static const struct v4l2_ioctl_ops delta_ioctl_ops = {
+ .vidioc_querycap = delta_querycap,
+ .vidioc_enum_fmt_vid_cap = delta_enum_fmt_frame,
+ .vidioc_g_fmt_vid_cap = delta_g_fmt_frame,
+ .vidioc_try_fmt_vid_cap = delta_try_fmt_frame,
+ .vidioc_s_fmt_vid_cap = delta_s_fmt_frame,
+ .vidioc_enum_fmt_vid_out = delta_enum_fmt_stream,
+ .vidioc_g_fmt_vid_out = delta_g_fmt_stream,
+ .vidioc_try_fmt_vid_out = delta_try_fmt_stream,
+ .vidioc_s_fmt_vid_out = delta_s_fmt_stream,
+ .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
+ .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
+ .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
+ .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
+ .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
+ .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
+ .vidioc_streamon = v4l2_m2m_ioctl_streamon,
+ .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
+ .vidioc_g_selection = delta_g_selection,
+};
+
+/*
+ * mem-to-mem operations
+ */
+
+static void delta_run_work(struct work_struct *work)
+{
+ struct delta_ctx *ctx = container_of(work, struct delta_ctx, run_work);
+ struct delta_dev *delta = ctx->dev;
+ const struct delta_dec *dec = ctx->dec;
+ struct delta_au *au;
+ struct delta_frame *frame = NULL;
+ int ret = 0;
+ bool discard = false;
+ struct vb2_v4l2_buffer *vbuf;
+
+ if (!dec) {
+ dev_err(delta->dev, "%s no decoder opened yet\n", ctx->name);
+ return;
+ }
+
+ /* protect instance against reentrancy */
+ mutex_lock(&ctx->lock);
+
+ vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ if (!vbuf) {
+ dev_err(delta->dev, "%s no buffer to decode\n", ctx->name);
+ mutex_unlock(&ctx->lock);
+ return;
+ }
+ au = to_au(vbuf);
+ au->size = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
+ au->dts = vbuf->vb2_buf.timestamp;
+
+ /* dump access unit */
+ dump_au(ctx, au);
+
+ /* enable the hardware */
+ if (!dec->pm) {
+ ret = delta_get_sync(ctx);
+ if (ret)
+ goto err;
+ }
+
+ /* decode this access unit */
+ ret = call_dec_op(dec, decode, ctx, au);
+
+ /*
+ * if the (-ENODATA) value is returned, it refers to the interlaced
+ * stream case for which 2 access units are needed to get 1 frame.
+ * So, this returned value doesn't mean that the decoding fails, but
+ * indicates that the timestamp information of the access unit shall
+ * not be taken into account, and that the V4L2 buffer associated with
+ * the access unit shall be flagged with V4L2_BUF_FLAG_ERROR to inform
+ * the user of this situation
+ */
+ if (ret == -ENODATA) {
+ discard = true;
+ } else if (ret) {
+ dev_err(delta->dev, "%s decoding failed (%d)\n",
+ ctx->name, ret);
+
+ /* disable the hardware */
+ if (!dec->pm)
+ delta_put_autosuspend(ctx);
+
+ goto err;
+ }
+
+ /* disable the hardware */
+ if (!dec->pm)
+ delta_put_autosuspend(ctx);
+
+ /* push au timestamp in FIFO */
+ if (!discard)
+ delta_push_dts(ctx, au->dts);
+
+ /* get available decoded frames */
+ while (1) {
+ ret = call_dec_op(dec, get_frame, ctx, &frame);
+ if (ret == -ENODATA) {
+ /* no more decoded frames */
+ goto out;
+ }
+ if (ret) {
+ dev_err(delta->dev, "%s cannot get decoded frame (%d)\n",
+ ctx->name, ret);
+ goto out;
+ }
+ if (!frame) {
+ dev_err(delta->dev,
+ "%s NULL decoded frame\n",
+ ctx->name);
+ ret = -EIO;
+ goto out;
+ }
+
+ /* pop timestamp and mark frame with it */
+ delta_pop_dts(ctx, &frame->dts);
+
+ /* release decoded frame to user */
+ delta_frame_done(ctx, frame, 0);
+ }
+
+out:
+ requeue_free_frames(ctx);
+ delta_au_done(ctx, au, (discard ? -ENODATA : 0));
+ mutex_unlock(&ctx->lock);
+ v4l2_m2m_job_finish(delta->m2m_dev, ctx->fh.m2m_ctx);
+ return;
+
+err:
+ requeue_free_frames(ctx);
+ delta_au_done(ctx, au, ret);
+ mutex_unlock(&ctx->lock);
+ v4l2_m2m_job_finish(delta->m2m_dev, ctx->fh.m2m_ctx);
+}
+
+static void delta_device_run(void *priv)
+{
+ struct delta_ctx *ctx = priv;
+ struct delta_dev *delta = ctx->dev;
+
+ queue_work(delta->work_queue, &ctx->run_work);
+}
+
+static void delta_job_abort(void *priv)
+{
+ struct delta_ctx *ctx = priv;
+ struct delta_dev *delta = ctx->dev;
+
+ dev_dbg(delta->dev, "%s aborting job\n", ctx->name);
+
+ ctx->aborting = true;
+}
+
+static int delta_job_ready(void *priv)
+{
+ struct delta_ctx *ctx = priv;
+ struct delta_dev *delta = ctx->dev;
+ int src_bufs = v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx);
+
+ if (!src_bufs) {
+ dev_dbg(delta->dev, "%s not ready: not enough video buffers.\n",
+ ctx->name);
+ return 0;
+ }
+
+ if (!v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx)) {
+ dev_dbg(delta->dev, "%s not ready: not enough video capture buffers.\n",
+ ctx->name);
+ return 0;
+ }
+
+ if (ctx->aborting) {
+ dev_dbg(delta->dev, "%s job not ready: aborting\n", ctx->name);
+ return 0;
+ }
+
+ dev_dbg(delta->dev, "%s job ready\n", ctx->name);
+
+ return 1;
+}
+
+/* mem-to-mem ops */
+static struct v4l2_m2m_ops delta_m2m_ops = {
+ .device_run = delta_device_run,
+ .job_ready = delta_job_ready,
+ .job_abort = delta_job_abort,
+ .lock = delta_lock,
+ .unlock = delta_unlock,
+};
+
+/*
+ * VB2 queue operations
+ */
+
+static int delta_vb2_au_queue_setup(struct vb2_queue *vq,
+ unsigned int *num_buffers,
+ unsigned int *num_planes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct delta_ctx *ctx = vb2_get_drv_priv(vq);
+ unsigned int size = ctx->max_au_size;
+
+ if (*num_planes)
+ return sizes[0] < size ? -EINVAL : 0;
+
+ *num_planes = 1;
+ if (*num_buffers < 1)
+ *num_buffers = 1;
+ if (*num_buffers > DELTA_MAX_AUS)
+ *num_buffers = DELTA_MAX_AUS;
+
+ sizes[0] = size;
+
+ return 0;
+}
+
+static int delta_vb2_au_prepare(struct vb2_buffer *vb)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ struct delta_ctx *ctx = vb2_get_drv_priv(q);
+ struct delta_dev *delta = ctx->dev;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct delta_au *au = to_au(vbuf);
+
+ if (!au->prepared) {
+ /* get memory addresses */
+ au->vaddr = vb2_plane_vaddr(&au->vbuf.vb2_buf, 0);
+ au->paddr = vb2_dma_contig_plane_dma_addr
+ (&au->vbuf.vb2_buf, 0);
+ au->prepared = true;
+ dev_dbg(delta->dev, "%s au[%d] prepared; virt=0x%p, phy=0x%pad\n",
+ ctx->name, vb->index, au->vaddr, &au->paddr);
+ }
+
+ if (vbuf->field == V4L2_FIELD_ANY)
+ vbuf->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int delta_setup_frame(struct delta_ctx *ctx,
+ struct delta_frame *frame)
+{
+ struct delta_dev *delta = ctx->dev;
+ const struct delta_dec *dec = ctx->dec;
+
+ if (frame->index >= DELTA_MAX_FRAMES) {
+ dev_err(delta->dev,
+ "%s frame index=%d exceeds output frame count (%d)\n",
+ ctx->name, frame->index, DELTA_MAX_FRAMES);
+ return -EINVAL;
+ }
+
+ if (ctx->nb_of_frames >= DELTA_MAX_FRAMES) {
+ dev_err(delta->dev,
+ "%s number of frames exceeds output frame count (%d > %d)\n",
+ ctx->name, ctx->nb_of_frames, DELTA_MAX_FRAMES);
+ return -EINVAL;
+ }
+
+ if (frame->index != ctx->nb_of_frames) {
+ dev_warn(delta->dev,
+ "%s frame index discontinuity detected, expected %d, got %d\n",
+ ctx->name, ctx->nb_of_frames, frame->index);
+ }
+
+ frame->state = DELTA_FRAME_FREE;
+ ctx->frames[ctx->nb_of_frames] = frame;
+ ctx->nb_of_frames++;
+
+ /* setup frame on decoder side */
+ return call_dec_op(dec, setup_frame, ctx, frame);
+}
+
+/*
+ * default implementation of get_frameinfo decoder ops
+ * matching frame information from stream information
+ * & with default pixel format & default alignment.
+ */
+int delta_get_frameinfo_default(struct delta_ctx *ctx,
+ struct delta_frameinfo *frameinfo)
+{
+ struct delta_streaminfo *streaminfo = &ctx->streaminfo;
+
+ memset(frameinfo, 0, sizeof(*frameinfo));
+ frameinfo->pixelformat = V4L2_PIX_FMT_NV12;
+ frameinfo->width = streaminfo->width;
+ frameinfo->height = streaminfo->height;
+ frameinfo->aligned_width = ALIGN(streaminfo->width,
+ DELTA_WIDTH_ALIGNMENT);
+ frameinfo->aligned_height = ALIGN(streaminfo->height,
+ DELTA_HEIGHT_ALIGNMENT);
+ frameinfo->size = frame_size(frameinfo->aligned_width,
+ frameinfo->aligned_height,
+ frameinfo->pixelformat);
+ if (streaminfo->flags & DELTA_STREAMINFO_FLAG_CROP) {
+ frameinfo->flags |= DELTA_FRAMEINFO_FLAG_CROP;
+ frameinfo->crop = streaminfo->crop;
+ }
+ if (streaminfo->flags & DELTA_STREAMINFO_FLAG_PIXELASPECT) {
+ frameinfo->flags |= DELTA_FRAMEINFO_FLAG_PIXELASPECT;
+ frameinfo->pixelaspect = streaminfo->pixelaspect;
+ }
+ frameinfo->field = streaminfo->field;
+
+ return 0;
+}
+
+/*
+ * default implementation of recycle decoder ops
+ * consisting to relax the "decoded" frame state
+ */
+int delta_recycle_default(struct delta_ctx *pctx,
+ struct delta_frame *frame)
+{
+ frame->state &= ~DELTA_FRAME_DEC;
+
+ return 0;
+}
+
+static void dump_frames_status(struct delta_ctx *ctx)
+{
+ struct delta_dev *delta = ctx->dev;
+ unsigned int i;
+ struct delta_frame *frame;
+ unsigned char str[100] = "";
+
+ dev_info(delta->dev,
+ "%s dumping frames status...\n", ctx->name);
+
+ for (i = 0; i < ctx->nb_of_frames; i++) {
+ frame = ctx->frames[i];
+ dev_info(delta->dev,
+ "%s frame[%d] %s\n",
+ ctx->name, frame->index,
+ frame_state_str(frame->state,
+ str, sizeof(str)));
+ }
+}
+
+int delta_get_free_frame(struct delta_ctx *ctx,
+ struct delta_frame **pframe)
+{
+ struct delta_dev *delta = ctx->dev;
+ struct vb2_v4l2_buffer *vbuf;
+ struct delta_frame *frame;
+
+ *pframe = NULL;
+
+ vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+ if (!vbuf) {
+ dev_err(delta->dev, "%s no frame available",
+ ctx->name);
+ return -EIO;
+ }
+
+ frame = to_frame(vbuf);
+ frame->state &= ~DELTA_FRAME_M2M;
+ if (frame->state != DELTA_FRAME_FREE) {
+ dev_err(delta->dev,
+ "%s frame[%d] is not free\n",
+ ctx->name, frame->index);
+ dump_frames_status(ctx);
+ return -ENODATA;
+ }
+
+ dev_dbg(delta->dev,
+ "%s get free frame[%d]\n", ctx->name, frame->index);
+
+ *pframe = frame;
+ return 0;
+}
+
+int delta_get_sync(struct delta_ctx *ctx)
+{
+ struct delta_dev *delta = ctx->dev;
+ int ret = 0;
+
+ /* enable the hardware */
+ ret = pm_runtime_get_sync(delta->dev);
+ if (ret < 0) {
+ dev_err(delta->dev, "%s pm_runtime_get_sync failed (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+void delta_put_autosuspend(struct delta_ctx *ctx)
+{
+ struct delta_dev *delta = ctx->dev;
+
+ pm_runtime_put_autosuspend(delta->dev);
+}
+
+static void delta_vb2_au_queue(struct vb2_buffer *vb)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ struct delta_ctx *ctx = vb2_get_drv_priv(q);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static int delta_vb2_au_start_streaming(struct vb2_queue *q,
+ unsigned int count)
+{
+ struct delta_ctx *ctx = vb2_get_drv_priv(q);
+ struct delta_dev *delta = ctx->dev;
+ const struct delta_dec *dec = ctx->dec;
+ struct delta_au *au;
+ int ret = 0;
+ struct vb2_v4l2_buffer *vbuf = NULL;
+ struct delta_streaminfo *streaminfo = &ctx->streaminfo;
+ struct delta_frameinfo *frameinfo = &ctx->frameinfo;
+
+ if ((ctx->state != DELTA_STATE_WF_FORMAT) &&
+ (ctx->state != DELTA_STATE_WF_STREAMINFO))
+ return 0;
+
+ if (ctx->state == DELTA_STATE_WF_FORMAT) {
+ /* open decoder if not yet done */
+ ret = delta_open_decoder(ctx,
+ ctx->streaminfo.streamformat,
+ ctx->frameinfo.pixelformat, &dec);
+ if (ret)
+ goto err;
+ ctx->dec = dec;
+ ctx->state = DELTA_STATE_WF_STREAMINFO;
+ }
+
+ /*
+ * first buffer should contain stream header,
+ * decode it to get the infos related to stream
+ * such as width, height, dpb, ...
+ */
+ vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ if (!vbuf) {
+ dev_err(delta->dev, "%s failed to start streaming, no stream header buffer enqueued\n",
+ ctx->name);
+ ret = -EINVAL;
+ goto err;
+ }
+ au = to_au(vbuf);
+ au->size = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
+ au->dts = vbuf->vb2_buf.timestamp;
+
+ delta_push_dts(ctx, au->dts);
+
+ /* dump access unit */
+ dump_au(ctx, au);
+
+ /* decode this access unit */
+ ret = call_dec_op(dec, decode, ctx, au);
+ if (ret) {
+ dev_err(delta->dev, "%s failed to start streaming, header decoding failed (%d)\n",
+ ctx->name, ret);
+ goto err;
+ }
+
+ ret = call_dec_op(dec, get_streaminfo, ctx, streaminfo);
+ if (ret) {
+ dev_dbg_ratelimited(delta->dev,
+ "%s failed to start streaming, valid stream header not yet decoded\n",
+ ctx->name);
+ goto err;
+ }
+ ctx->flags |= DELTA_FLAG_STREAMINFO;
+
+ ret = call_dec_op(dec, get_frameinfo, ctx, frameinfo);
+ if (ret)
+ goto err;
+ ctx->flags |= DELTA_FLAG_FRAMEINFO;
+
+ ctx->state = DELTA_STATE_READY;
+
+ delta_au_done(ctx, au, ret);
+ return 0;
+
+err:
+ /*
+ * return all buffers to vb2 in QUEUED state.
+ * This will give ownership back to userspace
+ */
+ if (vbuf)
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
+
+ while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_QUEUED);
+ return ret;
+}
+
+static void delta_vb2_au_stop_streaming(struct vb2_queue *q)
+{
+ struct delta_ctx *ctx = vb2_get_drv_priv(q);
+ struct vb2_v4l2_buffer *vbuf;
+
+ delta_flush_dts(ctx);
+
+ /* return all buffers to vb2 in ERROR state */
+ while ((vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx)))
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+
+ ctx->au_num = 0;
+
+ ctx->aborting = false;
+}
+
+static int delta_vb2_frame_queue_setup(struct vb2_queue *vq,
+ unsigned int *num_buffers,
+ unsigned int *num_planes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct delta_ctx *ctx = vb2_get_drv_priv(vq);
+ struct delta_dev *delta = ctx->dev;
+ struct delta_streaminfo *streaminfo = &ctx->streaminfo;
+ struct delta_frameinfo *frameinfo = &ctx->frameinfo;
+ unsigned int size = frameinfo->size;
+
+ /*
+ * the number of output buffers needed for decoding =
+ * user need (*num_buffers given, usually for display pipeline) +
+ * stream need (streaminfo->dpb) +
+ * decoding peak smoothing (depends on DELTA IP perf)
+ */
+ if (*num_buffers < DELTA_MIN_FRAME_USER) {
+ dev_dbg(delta->dev,
+ "%s num_buffers too low (%d), increasing to %d\n",
+ ctx->name, *num_buffers, DELTA_MIN_FRAME_USER);
+ *num_buffers = DELTA_MIN_FRAME_USER;
+ }
+
+ *num_buffers += streaminfo->dpb + DELTA_PEAK_FRAME_SMOOTHING;
+
+ if (*num_buffers > DELTA_MAX_FRAMES) {
+ dev_dbg(delta->dev,
+ "%s output frame count too high (%d), cut to %d\n",
+ ctx->name, *num_buffers, DELTA_MAX_FRAMES);
+ *num_buffers = DELTA_MAX_FRAMES;
+ }
+
+ if (*num_planes)
+ return sizes[0] < size ? -EINVAL : 0;
+
+ /* single plane for Y and CbCr */
+ *num_planes = 1;
+
+ sizes[0] = size;
+
+ ctx->nb_of_frames = 0;
+
+ return 0;
+}
+
+static int delta_vb2_frame_prepare(struct vb2_buffer *vb)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ struct delta_ctx *ctx = vb2_get_drv_priv(q);
+ struct delta_dev *delta = ctx->dev;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct delta_frame *frame = to_frame(vbuf);
+ int ret = 0;
+
+ if (!frame->prepared) {
+ frame->index = vbuf->vb2_buf.index;
+ frame->vaddr = vb2_plane_vaddr(&vbuf->vb2_buf, 0);
+ frame->paddr = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
+ frame->info = ctx->frameinfo;
+
+ ret = delta_setup_frame(ctx, frame);
+ if (ret) {
+ dev_err(delta->dev,
+ "%s setup_frame() failed (%d)\n",
+ ctx->name, ret);
+ return ret;
+ }
+ frame->prepared = true;
+ dev_dbg(delta->dev,
+ "%s frame[%d] prepared; virt=0x%p, phy=0x%pad\n",
+ ctx->name, vb->index, frame->vaddr,
+ &frame->paddr);
+ }
+
+ frame->flags = vbuf->flags;
+
+ return 0;
+}
+
+static void delta_vb2_frame_finish(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct delta_frame *frame = to_frame(vbuf);
+
+ /* update V4L2 fields for user */
+ vb2_set_plane_payload(&vbuf->vb2_buf, 0, frame->info.size);
+ vb->timestamp = frame->dts;
+ vbuf->field = frame->field;
+ vbuf->flags = frame->flags;
+}
+
+static void delta_vb2_frame_queue(struct vb2_buffer *vb)
+{
+ struct vb2_queue *q = vb->vb2_queue;
+ struct delta_ctx *ctx = vb2_get_drv_priv(q);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct delta_frame *frame = to_frame(vbuf);
+
+ /* recycle this frame */
+ delta_recycle(ctx, frame);
+}
+
+static void delta_vb2_frame_stop_streaming(struct vb2_queue *q)
+{
+ struct delta_ctx *ctx = vb2_get_drv_priv(q);
+ struct vb2_v4l2_buffer *vbuf;
+ struct delta_frame *frame;
+ const struct delta_dec *dec = ctx->dec;
+ unsigned int i;
+
+ delta_flush_dts(ctx);
+
+ call_dec_op(dec, flush, ctx);
+
+ /*
+ * return all buffers to vb2 in ERROR state
+ * & reset each frame state to OUT
+ */
+ for (i = 0; i < ctx->nb_of_frames; i++) {
+ frame = ctx->frames[i];
+ if (!(frame->state & DELTA_FRAME_OUT)) {
+ vbuf = &frame->vbuf;
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+ }
+ frame->state = DELTA_FRAME_OUT;
+ }
+
+ ctx->frame_num = 0;
+
+ ctx->aborting = false;
+}
+
+/* VB2 queue ops */
+static struct vb2_ops delta_vb2_au_ops = {
+ .queue_setup = delta_vb2_au_queue_setup,
+ .buf_prepare = delta_vb2_au_prepare,
+ .buf_queue = delta_vb2_au_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = delta_vb2_au_start_streaming,
+ .stop_streaming = delta_vb2_au_stop_streaming,
+};
+
+static struct vb2_ops delta_vb2_frame_ops = {
+ .queue_setup = delta_vb2_frame_queue_setup,
+ .buf_prepare = delta_vb2_frame_prepare,
+ .buf_finish = delta_vb2_frame_finish,
+ .buf_queue = delta_vb2_frame_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .stop_streaming = delta_vb2_frame_stop_streaming,
+};
+
+/*
+ * V4L2 file operations
+ */
+
+static int queue_init(void *priv,
+ struct vb2_queue *src_vq, struct vb2_queue *dst_vq)
+{
+ struct vb2_queue *q;
+ struct delta_ctx *ctx = priv;
+ struct delta_dev *delta = ctx->dev;
+ int ret;
+
+ /* setup vb2 queue for stream input */
+ q = src_vq;
+ q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ q->io_modes = VB2_MMAP | VB2_DMABUF;
+ q->drv_priv = ctx;
+ /* overload vb2 buf with private au struct */
+ q->buf_struct_size = sizeof(struct delta_au);
+ q->ops = &delta_vb2_au_ops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ q->lock = &delta->lock;
+ q->dev = delta->dev;
+
+ ret = vb2_queue_init(q);
+ if (ret)
+ return ret;
+
+ /* setup vb2 queue for frame output */
+ q = dst_vq;
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_DMABUF;
+ q->drv_priv = ctx;
+ /* overload vb2 buf with private frame struct */
+ q->buf_struct_size = sizeof(struct delta_frame)
+ + DELTA_MAX_FRAME_PRIV_SIZE;
+ q->ops = &delta_vb2_frame_ops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ q->lock = &delta->lock;
+ q->dev = delta->dev;
+
+ return vb2_queue_init(q);
+}
+
+static int delta_open(struct file *file)
+{
+ struct delta_dev *delta = video_drvdata(file);
+ struct delta_ctx *ctx = NULL;
+ int ret = 0;
+
+ mutex_lock(&delta->lock);
+
+ ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+ if (!ctx) {
+ ret = -ENOMEM;
+ goto err;
+ }
+ ctx->dev = delta;
+
+ v4l2_fh_init(&ctx->fh, video_devdata(file));
+ file->private_data = &ctx->fh;
+ v4l2_fh_add(&ctx->fh);
+
+ INIT_WORK(&ctx->run_work, delta_run_work);
+ mutex_init(&ctx->lock);
+
+ ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(delta->m2m_dev, ctx,
+ queue_init);
+ if (IS_ERR(ctx->fh.m2m_ctx)) {
+ ret = PTR_ERR(ctx->fh.m2m_ctx);
+ dev_err(delta->dev, "%s failed to initialize m2m context (%d)\n",
+ DELTA_PREFIX, ret);
+ goto err_fh_del;
+ }
+
+ /*
+ * wait stream format to determine which
+ * decoder to open
+ */
+ ctx->state = DELTA_STATE_WF_FORMAT;
+
+ INIT_LIST_HEAD(&ctx->dts);
+
+ /* set the instance name */
+ delta->instance_id++;
+ snprintf(ctx->name, sizeof(ctx->name), "[%3d:----]",
+ delta->instance_id);
+
+ /* default parameters for frame and stream */
+ set_default_params(ctx);
+
+ /* enable ST231 clocks */
+ if (delta->clk_st231)
+ if (clk_prepare_enable(delta->clk_st231))
+ dev_warn(delta->dev, "failed to enable st231 clk\n");
+
+ /* enable FLASH_PROMIP clock */
+ if (delta->clk_flash_promip)
+ if (clk_prepare_enable(delta->clk_flash_promip))
+ dev_warn(delta->dev, "failed to enable delta promip clk\n");
+
+ mutex_unlock(&delta->lock);
+
+ dev_dbg(delta->dev, "%s decoder instance created\n", ctx->name);
+
+ return 0;
+
+err_fh_del:
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+ kfree(ctx);
+err:
+ mutex_unlock(&delta->lock);
+
+ return ret;
+}
+
+static int delta_release(struct file *file)
+{
+ struct delta_ctx *ctx = to_ctx(file->private_data);
+ struct delta_dev *delta = ctx->dev;
+ const struct delta_dec *dec = ctx->dec;
+
+ mutex_lock(&delta->lock);
+
+ /* close decoder */
+ call_dec_op(dec, close, ctx);
+
+ v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+
+ v4l2_fh_del(&ctx->fh);
+ v4l2_fh_exit(&ctx->fh);
+
+ /* disable ST231 clocks */
+ if (delta->clk_st231)
+ clk_disable_unprepare(delta->clk_st231);
+
+ /* disable FLASH_PROMIP clock */
+ if (delta->clk_flash_promip)
+ clk_disable_unprepare(delta->clk_flash_promip);
+
+ dev_dbg(delta->dev, "%s decoder instance released\n", ctx->name);
+
+ kfree(ctx);
+
+ mutex_unlock(&delta->lock);
+ return 0;
+}
+
+/* V4L2 file ops */
+static const struct v4l2_file_operations delta_fops = {
+ .owner = THIS_MODULE,
+ .open = delta_open,
+ .release = delta_release,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = v4l2_m2m_fop_mmap,
+ .poll = v4l2_m2m_fop_poll,
+};
+
+/*
+ * Platform device operations
+ */
+
+static int delta_register_device(struct delta_dev *delta)
+{
+ int ret;
+ struct video_device *vdev;
+
+ if (!delta)
+ return -ENODEV;
+
+ delta->m2m_dev = v4l2_m2m_init(&delta_m2m_ops);
+ if (IS_ERR(delta->m2m_dev)) {
+ dev_err(delta->dev, "%s failed to initialize v4l2-m2m device\n",
+ DELTA_PREFIX);
+ ret = PTR_ERR(delta->m2m_dev);
+ goto err;
+ }
+
+ vdev = video_device_alloc();
+ if (!vdev) {
+ dev_err(delta->dev, "%s failed to allocate video device\n",
+ DELTA_PREFIX);
+ ret = -ENOMEM;
+ goto err_m2m_release;
+ }
+
+ vdev->fops = &delta_fops;
+ vdev->ioctl_ops = &delta_ioctl_ops;
+ vdev->release = video_device_release;
+ vdev->lock = &delta->lock;
+ vdev->vfl_dir = VFL_DIR_M2M;
+ vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M;
+ vdev->v4l2_dev = &delta->v4l2_dev;
+ snprintf(vdev->name, sizeof(vdev->name), "%s-%s",
+ DELTA_NAME, DELTA_FW_VERSION);
+
+ ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (ret) {
+ dev_err(delta->dev, "%s failed to register video device\n",
+ DELTA_PREFIX);
+ goto err_vdev_release;
+ }
+
+ delta->vdev = vdev;
+ video_set_drvdata(vdev, delta);
+ return 0;
+
+err_vdev_release:
+ video_device_release(vdev);
+err_m2m_release:
+ v4l2_m2m_release(delta->m2m_dev);
+err:
+ return ret;
+}
+
+static void delta_unregister_device(struct delta_dev *delta)
+{
+ if (!delta)
+ return;
+
+ if (delta->m2m_dev)
+ v4l2_m2m_release(delta->m2m_dev);
+
+ video_unregister_device(delta->vdev);
+}
+
+static int delta_probe(struct platform_device *pdev)
+{
+ struct delta_dev *delta;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ delta = devm_kzalloc(dev, sizeof(*delta), GFP_KERNEL);
+ if (!delta) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ delta->dev = dev;
+ delta->pdev = pdev;
+ platform_set_drvdata(pdev, delta);
+
+ mutex_init(&delta->lock);
+
+ /* get clock resources */
+ delta->clk_delta = devm_clk_get(dev, "delta");
+ if (IS_ERR(delta->clk_delta)) {
+ dev_dbg(dev, "%s can't get delta clock\n", DELTA_PREFIX);
+ delta->clk_delta = NULL;
+ }
+
+ delta->clk_st231 = devm_clk_get(dev, "delta-st231");
+ if (IS_ERR(delta->clk_st231)) {
+ dev_dbg(dev, "%s can't get delta-st231 clock\n", DELTA_PREFIX);
+ delta->clk_st231 = NULL;
+ }
+
+ delta->clk_flash_promip = devm_clk_get(dev, "delta-flash-promip");
+ if (IS_ERR(delta->clk_flash_promip)) {
+ dev_dbg(dev, "%s can't get delta-flash-promip clock\n",
+ DELTA_PREFIX);
+ delta->clk_flash_promip = NULL;
+ }
+
+ /* init pm_runtime used for power management */
+ pm_runtime_set_autosuspend_delay(dev, DELTA_HW_AUTOSUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_set_suspended(dev);
+ pm_runtime_enable(dev);
+
+ /* register all available decoders */
+ register_decoders(delta);
+
+ /* register all supported formats */
+ register_formats(delta);
+
+ /* register on V4L2 */
+ ret = v4l2_device_register(dev, &delta->v4l2_dev);
+ if (ret) {
+ dev_err(delta->dev, "%s failed to register V4L2 device\n",
+ DELTA_PREFIX);
+ goto err;
+ }
+
+ delta->work_queue = create_workqueue(DELTA_NAME);
+ if (!delta->work_queue) {
+ dev_err(delta->dev, "%s failed to allocate work queue\n",
+ DELTA_PREFIX);
+ ret = -ENOMEM;
+ goto err_v4l2;
+ }
+
+ /* register device */
+ ret = delta_register_device(delta);
+ if (ret)
+ goto err_work_queue;
+
+ dev_info(dev, "%s %s registered as /dev/video%d\n",
+ DELTA_PREFIX, delta->vdev->name, delta->vdev->num);
+
+ return 0;
+
+err_work_queue:
+ destroy_workqueue(delta->work_queue);
+err_v4l2:
+ v4l2_device_unregister(&delta->v4l2_dev);
+err:
+ return ret;
+}
+
+static int delta_remove(struct platform_device *pdev)
+{
+ struct delta_dev *delta = platform_get_drvdata(pdev);
+
+ delta_unregister_device(delta);
+
+ destroy_workqueue(delta->work_queue);
+
+ pm_runtime_put_autosuspend(delta->dev);
+ pm_runtime_disable(delta->dev);
+
+ v4l2_device_unregister(&delta->v4l2_dev);
+
+ return 0;
+}
+
+static int delta_runtime_suspend(struct device *dev)
+{
+ struct delta_dev *delta = dev_get_drvdata(dev);
+
+ if (delta->clk_delta)
+ clk_disable_unprepare(delta->clk_delta);
+
+ return 0;
+}
+
+static int delta_runtime_resume(struct device *dev)
+{
+ struct delta_dev *delta = dev_get_drvdata(dev);
+
+ if (delta->clk_delta)
+ if (clk_prepare_enable(delta->clk_delta))
+ dev_warn(dev, "failed to prepare/enable delta clk\n");
+
+ return 0;
+}
+
+/* PM ops */
+static const struct dev_pm_ops delta_pm_ops = {
+ .runtime_suspend = delta_runtime_suspend,
+ .runtime_resume = delta_runtime_resume,
+};
+
+static const struct of_device_id delta_match_types[] = {
+ {
+ .compatible = "st,st-delta",
+ },
+ {
+ /* end node */
+ }
+};
+
+MODULE_DEVICE_TABLE(of, delta_match_types);
+
+static struct platform_driver delta_driver = {
+ .probe = delta_probe,
+ .remove = delta_remove,
+ .driver = {
+ .name = DELTA_NAME,
+ .of_match_table = delta_match_types,
+ .pm = &delta_pm_ops},
+};
+
+module_platform_driver(delta_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hugues Fruchet <hugues.fruchet@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics DELTA video decoder V4L2 driver");
--- /dev/null
+/*
+ * Copyright (C) STMicroelectronics SA 2015
+ * Author: Hugues Fruchet <hugues.fruchet@st.com> for STMicroelectronics.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#ifndef DELTA_H
+#define DELTA_H
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-mem2mem.h>
+
+#include "delta-cfg.h"
+
+/*
+ * enum delta_state - state of decoding instance
+ *
+ *@DELTA_STATE_WF_FORMAT:
+ * Wait for compressed format to be set by V4L2 client in order
+ * to know what is the relevant decoder to open.
+ *
+ *@DELTA_STATE_WF_STREAMINFO:
+ * Wait for stream information to be available (bitstream
+ * header parsing is done).
+ *
+ *@DELTA_STATE_READY:
+ * Decoding instance is ready to decode compressed access unit.
+ *
+ */
+enum delta_state {
+ DELTA_STATE_WF_FORMAT,
+ DELTA_STATE_WF_STREAMINFO,
+ DELTA_STATE_READY,
+};
+
+/*
+ * struct delta_streaminfo - information about stream to decode
+ *
+ * @flags: validity of fields (crop, pixelaspect, other)
+ * @width: width of video stream
+ * @height: height ""
+ * @streamformat: fourcc compressed format of video (MJPEG, MPEG2, ...)
+ * @dpb: number of frames needed to decode a single frame
+ * (h264 dpb, up to 16)
+ * @crop: cropping window inside decoded frame (1920x1080@0,0
+ * inside 1920x1088 frame for ex.)
+ * @pixelaspect: pixel aspect ratio of video (4/3, 5/4)
+ * @field: interlaced or not
+ * @profile: profile string
+ * @level: level string
+ * @other: other string information from codec
+ * @colorspace: colorspace identifier
+ * @xfer_func: transfer function identifier
+ * @ycbcr_enc: Y'CbCr encoding identifier
+ * @quantization: quantization identifier
+ */
+struct delta_streaminfo {
+ u32 flags;
+ u32 streamformat;
+ u32 width;
+ u32 height;
+ u32 dpb;
+ struct v4l2_rect crop;
+ struct v4l2_fract pixelaspect;
+ enum v4l2_field field;
+ u8 profile[32];
+ u8 level[32];
+ u8 other[32];
+ enum v4l2_colorspace colorspace;
+ enum v4l2_xfer_func xfer_func;
+ enum v4l2_ycbcr_encoding ycbcr_enc;
+ enum v4l2_quantization quantization;
+};
+
+#define DELTA_STREAMINFO_FLAG_CROP 0x0001
+#define DELTA_STREAMINFO_FLAG_PIXELASPECT 0x0002
+#define DELTA_STREAMINFO_FLAG_OTHER 0x0004
+
+/*
+ * struct delta_au - access unit structure.
+ *
+ * @vbuf: video buffer information for V4L2
+ * @list: V4L2 m2m list that the frame belongs to
+ * @prepared: if set vaddr/paddr are resolved
+ * @vaddr: virtual address (kernel can read/write)
+ * @paddr: physical address (for hardware)
+ * @flags: access unit type (V4L2_BUF_FLAG_KEYFRAME/PFRAME/BFRAME)
+ * @dts: decoding timestamp of this access unit
+ */
+struct delta_au {
+ struct vb2_v4l2_buffer vbuf; /* keep first */
+ struct list_head list; /* keep second */
+
+ bool prepared;
+ u32 size;
+ void *vaddr;
+ dma_addr_t paddr;
+ u32 flags;
+ u64 dts;
+};
+
+/*
+ * struct delta_frameinfo - information about decoded frame
+ *
+ * @flags: validity of fields (crop, pixelaspect)
+ * @pixelformat: fourcc code for uncompressed video format
+ * @width: width of frame
+ * @height: height of frame
+ * @aligned_width: width of frame (with encoder or decoder alignment
+ * constraint)
+ * @aligned_height: height of frame (with encoder or decoder alignment
+ * constraint)
+ * @size: maximum size in bytes required for data
+ * @crop: cropping window inside frame (1920x1080@0,0
+ * inside 1920x1088 frame for ex.)
+ * @pixelaspect: pixel aspect ratio of video (4/3, 5/4)
+ * @field: interlaced mode
+ * @colorspace: colorspace identifier
+ * @xfer_func: transfer function identifier
+ * @ycbcr_enc: Y'CbCr encoding identifier
+ * @quantization: quantization identifier
+ */
+struct delta_frameinfo {
+ u32 flags;
+ u32 pixelformat;
+ u32 width;
+ u32 height;
+ u32 aligned_width;
+ u32 aligned_height;
+ u32 size;
+ struct v4l2_rect crop;
+ struct v4l2_fract pixelaspect;
+ enum v4l2_field field;
+ enum v4l2_colorspace colorspace;
+ enum v4l2_xfer_func xfer_func;
+ enum v4l2_ycbcr_encoding ycbcr_enc;
+ enum v4l2_quantization quantization;
+};
+
+#define DELTA_FRAMEINFO_FLAG_CROP 0x0001
+#define DELTA_FRAMEINFO_FLAG_PIXELASPECT 0x0002
+
+/*
+ * struct delta_frame - frame structure.
+ *
+ * @vbuf: video buffer information for V4L2
+ * @list: V4L2 m2m list that the frame belongs to
+ * @info: frame information (width, height, format, alignment...)
+ * @prepared: if set pix/vaddr/paddr are resolved
+ * @index: frame index, aligned on V4L2 wow
+ * @vaddr: virtual address (kernel can read/write)
+ * @paddr: physical address (for hardware)
+ * @state: frame state for frame lifecycle tracking
+ * (DELTA_FRAME_FREE/DEC/OUT/REC/...)
+ * @flags: frame type (V4L2_BUF_FLAG_KEYFRAME/PFRAME/BFRAME)
+ * @dts: decoding timestamp of this frame
+ * @field: field order for interlaced frame
+ */
+struct delta_frame {
+ struct vb2_v4l2_buffer vbuf; /* keep first */
+ struct list_head list; /* keep second */
+
+ struct delta_frameinfo info;
+ bool prepared;
+ u32 index;
+ void *vaddr;
+ dma_addr_t paddr;
+ u32 state;
+ u32 flags;
+ u64 dts;
+ enum v4l2_field field;
+};
+
+/* frame state for frame lifecycle tracking */
+#define DELTA_FRAME_FREE 0x00 /* is free and can be used for decoding */
+#define DELTA_FRAME_REF 0x01 /* is a reference frame */
+#define DELTA_FRAME_BSY 0x02 /* is owned by decoder and busy */
+#define DELTA_FRAME_DEC 0x04 /* contains decoded content */
+#define DELTA_FRAME_OUT 0x08 /* has been given to user */
+#define DELTA_FRAME_RDY 0x10 /* is ready but still held by decoder */
+#define DELTA_FRAME_M2M 0x20 /* is owned by mem2mem framework */
+
+/*
+ * struct delta_dts - decoding timestamp.
+ *
+ * @list: list to chain timestamps
+ * @val: timestamp in microseconds
+ */
+struct delta_dts {
+ struct list_head list;
+ u64 val;
+};
+
+struct delta_ctx;
+
+/*
+ * struct delta_dec - decoder structure.
+ *
+ * @name: name of this decoder
+ * @streamformat: input stream format that this decoder support
+ * @pixelformat: pixel format of decoded frame that this decoder support
+ * @max_width: (optional) maximum width that can decode this decoder
+ * if not set, maximum width is DELTA_MAX_WIDTH
+ * @max_height: (optional) maximum height that can decode this decoder
+ * if not set, maximum height is DELTA_MAX_HEIGHT
+ * @pm: (optional) if set, decoder will manage power on its own
+ * @open: open this decoder
+ * @close: close this decoder
+ * @setup_frame: setup frame to be used by decoder, see below
+ * @get_streaminfo: get stream related infos, see below
+ * @get_frameinfo: get decoded frame related infos, see below
+ * @set_frameinfo: (optional) set decoded frame related infos, see below
+ * @setup_frame: setup frame to be used by decoder, see below
+ * @decode: decode a single access unit, see below
+ * @get_frame: get the next decoded frame available, see below
+ * @recycle: recycle the given frame, see below
+ * @flush: (optional) flush decoder, see below
+ */
+struct delta_dec {
+ const char *name;
+ u32 streamformat;
+ u32 pixelformat;
+ u32 max_width;
+ u32 max_height;
+ bool pm;
+
+ /*
+ * decoder ops
+ */
+ int (*open)(struct delta_ctx *ctx);
+ int (*close)(struct delta_ctx *ctx);
+
+ /*
+ * setup_frame() - setup frame to be used by decoder
+ * @ctx: (in) instance
+ * @frame: (in) frame to use
+ * @frame.index (in) identifier of frame
+ * @frame.vaddr (in) virtual address (kernel can read/write)
+ * @frame.paddr (in) physical address (for hardware)
+ *
+ * Frame is to be allocated by caller, then given
+ * to decoder through this call.
+ * Several frames must be given to decoder (dpb),
+ * each frame is identified using its index.
+ */
+ int (*setup_frame)(struct delta_ctx *ctx, struct delta_frame *frame);
+
+ /*
+ * get_streaminfo() - get stream related infos
+ * @ctx: (in) instance
+ * @streaminfo: (out) width, height, dpb,...
+ *
+ * Precondition: stream header must have been successfully
+ * parsed to have this call successful & @streaminfo valid.
+ * Header parsing must be done using decode(), giving
+ * explicitly header access unit or first access unit of bitstream.
+ * If no valid header is found, get_streaminfo will return -ENODATA,
+ * in this case the next bistream access unit must be decoded till
+ * get_streaminfo becomes successful.
+ */
+ int (*get_streaminfo)(struct delta_ctx *ctx,
+ struct delta_streaminfo *streaminfo);
+
+ /*
+ * get_frameinfo() - get decoded frame related infos
+ * @ctx: (in) instance
+ * @frameinfo: (out) width, height, alignment, crop, ...
+ *
+ * Precondition: get_streaminfo() must be successful
+ */
+ int (*get_frameinfo)(struct delta_ctx *ctx,
+ struct delta_frameinfo *frameinfo);
+
+ /*
+ * set_frameinfo() - set decoded frame related infos
+ * @ctx: (in) instance
+ * @frameinfo: (out) width, height, alignment, crop, ...
+ *
+ * Optional.
+ * Typically used to negotiate with decoder the output
+ * frame if decoder can do post-processing.
+ */
+ int (*set_frameinfo)(struct delta_ctx *ctx,
+ struct delta_frameinfo *frameinfo);
+
+ /*
+ * decode() - decode a single access unit
+ * @ctx: (in) instance
+ * @au: (in/out) access unit
+ * @au.size (in) size of au to decode
+ * @au.vaddr (in) virtual address (kernel can read/write)
+ * @au.paddr (in) physical address (for hardware)
+ * @au.flags (out) au type (V4L2_BUF_FLAG_KEYFRAME/
+ * PFRAME/BFRAME)
+ *
+ * Decode the access unit given. Decode is synchronous;
+ * access unit memory is no more needed after this call.
+ * After this call, none, one or several frames could
+ * have been decoded, which can be retrieved using
+ * get_frame().
+ */
+ int (*decode)(struct delta_ctx *ctx, struct delta_au *au);
+
+ /*
+ * get_frame() - get the next decoded frame available
+ * @ctx: (in) instance
+ * @frame: (out) frame with decoded data:
+ * @frame.index (out) identifier of frame
+ * @frame.field (out) field order for interlaced frame
+ * @frame.state (out) frame state for frame lifecycle tracking
+ * @frame.flags (out) frame type (V4L2_BUF_FLAG_KEYFRAME/
+ * PFRAME/BFRAME)
+ *
+ * Get the next available decoded frame.
+ * If no frame is available, -ENODATA is returned.
+ * If a frame is available, frame structure is filled with
+ * relevant data, frame.index identifying this exact frame.
+ * When this frame is no more needed by upper layers,
+ * recycle() must be called giving this frame identifier.
+ */
+ int (*get_frame)(struct delta_ctx *ctx, struct delta_frame **frame);
+
+ /*
+ * recycle() - recycle the given frame
+ * @ctx: (in) instance
+ * @frame: (in) frame to recycle:
+ * @frame.index (in) identifier of frame
+ *
+ * recycle() is to be called by user when the decoded frame
+ * is no more needed (composition/display done).
+ * This frame will then be reused by decoder to proceed
+ * with next frame decoding.
+ * If not enough frames have been provided through setup_frame(),
+ * or recycle() is not called fast enough, the decoder can run out
+ * of available frames to proceed with decoding (starvation).
+ * This case is guarded by wq_recycle wait queue which ensures that
+ * decoder is called only if at least one frame is available.
+ */
+ int (*recycle)(struct delta_ctx *ctx, struct delta_frame *frame);
+
+ /*
+ * flush() - flush decoder
+ * @ctx: (in) instance
+ *
+ * Optional.
+ * Reset decoder context and discard all internal buffers.
+ * This allows implementation of seek, which leads to discontinuity
+ * of input bitstream that decoder must know to restart its internal
+ * decoding logic.
+ */
+ int (*flush)(struct delta_ctx *ctx);
+};
+
+struct delta_dev;
+
+/*
+ * struct delta_ctx - instance structure.
+ *
+ * @flags: validity of fields (streaminfo)
+ * @fh: V4L2 file handle
+ * @dev: device context
+ * @dec: selected decoder context for this instance
+ * @state: instance state
+ * @frame_num: frame number
+ * @au_num: access unit number
+ * @max_au_size: max size of an access unit
+ * @streaminfo: stream information (width, height, dpb, interlacing...)
+ * @frameinfo: frame information (width, height, format, alignment...)
+ * @nb_of_frames: number of frames available for decoding
+ * @frames: array of decoding frames to keep track of frame
+ * state and manage frame recycling
+ * @decoded_frames: nb of decoded frames from opening
+ * @output_frames: nb of output frames from opening
+ * @dropped_frames: nb of frames dropped (ie access unit not parsed
+ * or frame decoded but not output)
+ * @stream_errors: nb of stream errors (corrupted, not supported, ...)
+ * @decode_errors: nb of decode errors (firmware error)
+ * @sys_errors: nb of system errors (memory, ipc, ...)
+ * @dts: FIFO of decoding timestamp.
+ * output frames are timestamped with incoming access
+ * unit timestamps using this fifo.
+ * @name: string naming this instance (debug purpose)
+ * @run_work: decoding work
+ * @lock: lock for decoding work serialization
+ * @aborting: true if current job aborted
+ * @priv: private decoder context for this instance, allocated
+ * by decoder @open time.
+ */
+struct delta_ctx {
+ u32 flags;
+ struct v4l2_fh fh;
+ struct delta_dev *dev;
+ const struct delta_dec *dec;
+ enum delta_state state;
+ u32 frame_num;
+ u32 au_num;
+ size_t max_au_size;
+ struct delta_streaminfo streaminfo;
+ struct delta_frameinfo frameinfo;
+ u32 nb_of_frames;
+ struct delta_frame *frames[DELTA_MAX_FRAMES];
+ u32 decoded_frames;
+ u32 output_frames;
+ u32 dropped_frames;
+ u32 stream_errors;
+ u32 decode_errors;
+ u32 sys_errors;
+ struct list_head dts;
+ char name[100];
+ struct work_struct run_work;
+ struct mutex lock;
+ bool aborting;
+ void *priv;
+};
+
+#define DELTA_FLAG_STREAMINFO 0x0001
+#define DELTA_FLAG_FRAMEINFO 0x0002
+
+#define DELTA_MAX_FORMATS DELTA_MAX_DECODERS
+
+/*
+ * struct delta_dev - device struct, 1 per probe (so single one for
+ * all platform life)
+ *
+ * @v4l2_dev: v4l2 device
+ * @vdev: v4l2 video device
+ * @pdev: platform device
+ * @dev: device
+ * @m2m_dev: memory-to-memory V4L2 device
+ * @lock: device lock, for crit section & V4L2 ops serialization.
+ * @clk_delta: delta main clock
+ * @clk_st231: st231 coprocessor main clock
+ * @clk_flash_promip: flash promip clock
+ * @decoders: list of registered decoders
+ * @nb_of_decoders: nb of registered decoders
+ * @pixelformats: supported uncompressed video formats
+ * @nb_of_pixelformats: number of supported umcompressed video formats
+ * @streamformats: supported compressed video formats
+ * @nb_of_streamformats:number of supported compressed video formats
+ * @instance_id: rolling counter identifying an instance (debug purpose)
+ * @work_queue: decoding job work queue
+ */
+struct delta_dev {
+ struct v4l2_device v4l2_dev;
+ struct video_device *vdev;
+ struct platform_device *pdev;
+ struct device *dev;
+ struct v4l2_m2m_dev *m2m_dev;
+ struct mutex lock;
+ struct clk *clk_delta;
+ struct clk *clk_st231;
+ struct clk *clk_flash_promip;
+ const struct delta_dec *decoders[DELTA_MAX_DECODERS];
+ u32 nb_of_decoders;
+ u32 pixelformats[DELTA_MAX_FORMATS];
+ u32 nb_of_pixelformats;
+ u32 streamformats[DELTA_MAX_FORMATS];
+ u32 nb_of_streamformats;
+ u8 instance_id;
+ struct workqueue_struct *work_queue;
+};
+
+static inline char *frame_type_str(u32 flags)
+{
+ if (flags & V4L2_BUF_FLAG_KEYFRAME)
+ return "I";
+ if (flags & V4L2_BUF_FLAG_PFRAME)
+ return "P";
+ if (flags & V4L2_BUF_FLAG_BFRAME)
+ return "B";
+ return "?";
+}
+
+static inline char *frame_field_str(enum v4l2_field field)
+{
+ if (field == V4L2_FIELD_NONE)
+ return "-";
+ if (field == V4L2_FIELD_TOP)
+ return "T";
+ if (field == V4L2_FIELD_BOTTOM)
+ return "B";
+ if (field == V4L2_FIELD_INTERLACED)
+ return "I";
+ if (field == V4L2_FIELD_INTERLACED_TB)
+ return "TB";
+ if (field == V4L2_FIELD_INTERLACED_BT)
+ return "BT";
+ return "?";
+}
+
+static inline char *frame_state_str(u32 state, char *str, unsigned int len)
+{
+ snprintf(str, len, "%s %s %s %s %s %s",
+ (state & DELTA_FRAME_REF) ? "ref" : " ",
+ (state & DELTA_FRAME_BSY) ? "bsy" : " ",
+ (state & DELTA_FRAME_DEC) ? "dec" : " ",
+ (state & DELTA_FRAME_OUT) ? "out" : " ",
+ (state & DELTA_FRAME_M2M) ? "m2m" : " ",
+ (state & DELTA_FRAME_RDY) ? "rdy" : " ");
+ return str;
+}
+
+int delta_get_frameinfo_default(struct delta_ctx *ctx,
+ struct delta_frameinfo *frameinfo);
+int delta_recycle_default(struct delta_ctx *pctx,
+ struct delta_frame *frame);
+
+int delta_get_free_frame(struct delta_ctx *ctx,
+ struct delta_frame **pframe);
+
+int delta_get_sync(struct delta_ctx *ctx);
+void delta_put_autosuspend(struct delta_ctx *ctx);
+
+#endif /* DELTA_H */
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff