[PATCH v3 3/4] media: staging: tegra-vde: Support V4L stateless video decoder API

Dmitry Osipenko
2022-02-07T14:46:49Z

Expose Tegra video decoder as a generic V4L M2M stateless video decoder.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/staging/media/tegra-vde/Kconfig | 7 +
drivers/staging/media/tegra-vde/Makefile | 2 +-
drivers/staging/media/tegra-vde/h264.c | 304 ++++++-
drivers/staging/media/tegra-vde/v4l2.c | 1018 ++++++++++++++++++++++
drivers/staging/media/tegra-vde/vde.c | 74 +-
drivers/staging/media/tegra-vde/vde.h | 86 ++
6 files changed, 1483 insertions(+), 8 deletions(-)
create mode 100644 drivers/staging/media/tegra-vde/v4l2.c

diff --git a/drivers/staging/media/tegra-vde/Kconfig b/drivers/staging/media/tegra-vde/Kconfig
index 0dc78afd09e0..07dbc1f44ca8 100644
--- a/drivers/staging/media/tegra-vde/Kconfig
+++ b/drivers/staging/media/tegra-vde/Kconfig
@@ -2,9 +2,16 @@
config TEGRA_VDE
tristate "NVIDIA Tegra Video Decoder Engine driver"
depends on ARCH_TEGRA || COMPILE_TEST
+ depends on VIDEO_DEV && VIDEO_V4L2
select DMA_SHARED_BUFFER
select IOMMU_IOVA
+ select MEDIA_CONTROLLER
+ select MEDIA_CONTROLLER_REQUEST_API
select SRAM
+ select VIDEOBUF2_DMA_CONTIG
+ select VIDEOBUF2_DMA_SG
+ select V4L2_H264
+ select V4L2_MEM2MEM_DEV
help
Say Y here to enable support for the NVIDIA Tegra video decoder
driver.
diff --git a/drivers/staging/media/tegra-vde/Makefile b/drivers/staging/media/tegra-vde/Makefile
index 43525b08b3b0..1758aa201baa 100644
--- a/drivers/staging/media/tegra-vde/Makefile
+++ b/drivers/staging/media/tegra-vde/Makefile
@@ -1,3 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
-tegra-vde-y := vde.o iommu.o dmabuf-cache.o h264.o
+tegra-vde-y := vde.o iommu.o dmabuf-cache.o h264.o v4l2.o
obj-$(CONFIG_TEGRA_VDE) += tegra-vde.o
diff --git a/drivers/staging/media/tegra-vde/h264.c b/drivers/staging/media/tegra-vde/h264.c
index 03faa705bf71..cbf27f0cfdb1 100644
--- a/drivers/staging/media/tegra-vde/h264.c
+++ b/drivers/staging/media/tegra-vde/h264.c
@@ -11,10 +11,18 @@
#include <linux/reset.h>
#include <linux/slab.h>

+#include <media/v4l2-h264.h>
+
#include "trace.h"
#include "uapi.h"
#include "vde.h"

+struct h264_reflists {
+ u8 p[V4L2_H264_NUM_DPB_ENTRIES];
+ u8 b0[V4L2_H264_NUM_DPB_ENTRIES];
+ u8 b1[V4L2_H264_NUM_DPB_ENTRIES];
+};
+
static int tegra_vde_wait_mbe(struct tegra_vde *vde)
{
u32 tmp;
@@ -125,8 +133,8 @@ static void tegra_vde_setup_frameid(struct tegra_vde *vde,
u32 y_addr = frame ? frame->y_addr : 0x6CDEAD00;
u32 cb_addr = frame ? frame->cb_addr : 0x6CDEAD00;
u32 cr_addr = frame ? frame->cr_addr : 0x6CDEAD00;
- u32 value1 = frame ? ((mbs_width << 16) | mbs_height) : 0;
- u32 value2 = frame ? ((((mbs_width + 1) >> 1) << 6) | 1) : 0;
+ u32 value1 = frame ? ((frame->luma_atoms_pitch << 16) | mbs_height) : 0;
+ u32 value2 = frame ? ((frame->chroma_atoms_pitch << 6) | 1) : 0;

tegra_vde_writel(vde, y_addr >> 8, vde->frameid, 0x000 + frameid * 4);
tegra_vde_writel(vde, cb_addr >> 8, vde->frameid, 0x100 + frameid * 4);
@@ -645,3 +653,295 @@ int tegra_vde_decode_h264(struct tegra_vde *vde,

return tegra_vde_decode_end(vde);
}
+
+static struct vb2_buffer *get_ref_buf(struct tegra_ctx *ctx,
+ struct vb2_v4l2_buffer *dst,
+ unsigned int dpb_idx)
+{
+ const struct v4l2_h264_dpb_entry *dpb = ctx->h264.decode_params->dpb;
+ struct vb2_queue *cap_q = &ctx->fh.m2m_ctx->cap_q_ctx.q;
+ int buf_idx = -1;
+
+ if (dpb[dpb_idx].flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE)
+ buf_idx = vb2_find_timestamp(cap_q,
+ dpb[dpb_idx].reference_ts, 0);
+
+ /*
+ * If a DPB entry is unused or invalid, address of current destination
+ * buffer is returned.
+ */
+ if (buf_idx < 0)
+ return &dst->vb2_buf;
+
+ return vb2_get_buffer(cap_q, buf_idx);
+}
+
+static int tegra_vde_validate_vb_size(struct tegra_ctx *ctx,
+ struct vb2_buffer *vb,
+ unsigned int plane_id,
+ size_t min_size)
+{
+ u64 offset = vb->planes[plane_id].data_offset;
+ struct device *dev = ctx->vde->dev;
+
+ if (offset + min_size > vb2_plane_size(vb, plane_id)) {
+ dev_err(dev, "Too small plane[%u] size %lu @0x%llX, should be at least %zu\n",
+ plane_id, vb2_plane_size(vb, plane_id), offset, min_size);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int tegra_vde_h264_setup_frame(struct tegra_ctx *ctx,
+ struct tegra_vde_h264_decoder_ctx *h264,
+ struct v4l2_h264_reflist_builder *b,
+ struct vb2_buffer *vb,
+ unsigned int ref_id,
+ unsigned int id)
+{
+ struct v4l2_pix_format_mplane *pixfmt = &ctx->decoded_fmt.fmt.pix_mp;
+ struct tegra_m2m_buffer *tb = vb_to_tegra_buf(vb);
+ struct tegra_ctx_h264 *h = &ctx->h264;
+ struct tegra_vde *vde = ctx->vde;
+ struct device *dev = vde->dev;
+ unsigned int cstride, lstride;
+ unsigned int flags = 0;
+ size_t lsize, csize;
+ int err, frame_num;
+
+ lsize = h264->pic_width_in_mbs * 16 * h264->pic_height_in_mbs * 16;
+ csize = h264->pic_width_in_mbs * 8 * h264->pic_height_in_mbs * 8;
+ lstride = pixfmt->plane_fmt[0].bytesperline;
+ cstride = pixfmt->plane_fmt[1].bytesperline;
+
+ err = tegra_vde_validate_vb_size(ctx, vb, 0, lsize);
+ if (err)
+ return err;
+
+ err = tegra_vde_validate_vb_size(ctx, vb, 1, csize);
+ if (err)
+ return err;
+
+ err = tegra_vde_validate_vb_size(ctx, vb, 2, csize);
+ if (err)
+ return err;
+
+ if (!tb->aux || tb->aux->size < csize) {
+ dev_err(dev, "Too small aux size %zd, should be at least %zu\n",
+ tb->aux ? tb->aux->size : -1, csize);
+ return -EINVAL;
+ }
+
+ if (id == 0) {
+ frame_num = h->decode_params->frame_num;
+
+ if (h->decode_params->nal_ref_idc)
+ flags |= FLAG_REFERENCE;
+ } else {
+ frame_num = b->refs[ref_id].frame_num;
+ }
+
+ if (tb->b_frame)
+ flags |= FLAG_B_FRAME;
+
+ vde->frames[id].flags = flags;
+ vde->frames[id].y_addr = tb->dma_addr[0];
+ vde->frames[id].cb_addr = tb->dma_addr[1];
+ vde->frames[id].cr_addr = tb->dma_addr[2];
+ vde->frames[id].aux_addr = tb->aux->dma_addr;
+ vde->frames[id].frame_num = frame_num & 0x7fffff;
+ vde->frames[id].luma_atoms_pitch = lstride / VDE_ATOM;
+ vde->frames[id].chroma_atoms_pitch = cstride / VDE_ATOM;
+
+ return 0;
+}
+
+static int tegra_vde_h264_setup_frames(struct tegra_ctx *ctx,
+ struct tegra_vde_h264_decoder_ctx *h264)
+{
+ struct vb2_v4l2_buffer *src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+ struct vb2_v4l2_buffer *dst = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
+ const struct v4l2_h264_dpb_entry *dpb = ctx->h264.decode_params->dpb;
+ struct tegra_m2m_buffer *tb = vb_to_tegra_buf(&dst->vb2_buf);
+ struct tegra_ctx_h264 *h = &ctx->h264;
+ struct v4l2_h264_reflist_builder b;
+ struct h264_reflists reflists;
+ struct vb2_buffer *ref;
+ unsigned int i;
+ u8 *dpb_id;
+ int err;
+
+ /*
+ * Tegra hardware requires information about frame's type, assuming
+ * that frame consists of the same type slices. Userspace must tag
+ * frame's type appropriately.
+ *
+ * Decoding of a non-uniform frames isn't supported by hardware and
+ * require software preprocessing that we don't implement. Decoding
+ * is expected to fail in this case. Such video streams are rare in
+ * practice, so not a big deal.
+ *
+ * If userspace doesn't tell us frame's type, then we will try decode
+ * as-is.
+ */
+ v4l2_m2m_buf_copy_metadata(src, dst, true);
+
+ if (h->decode_params->flags & V4L2_H264_DECODE_PARAM_FLAG_BFRAME)
+ tb->b_frame = true;
+ else
+ tb->b_frame = false;
+
+ err = tegra_vde_h264_setup_frame(ctx, h264, NULL, &dst->vb2_buf, 0,
+ h264->dpb_frames_nb++);
+ if (err)
+ return err;
+
+ if (!(h->decode_params->flags & (V4L2_H264_DECODE_PARAM_FLAG_PFRAME |
+ V4L2_H264_DECODE_PARAM_FLAG_BFRAME)))
+ return 0;
+
+ v4l2_h264_init_reflist_builder(&b, h->decode_params, h->sps, dpb);
+
+ if (h->decode_params->flags & V4L2_H264_DECODE_PARAM_FLAG_BFRAME) {
+ v4l2_h264_build_b_ref_lists(&b, reflists.b0, reflists.b1);
+ dpb_id = reflists.b0;
+ } else {
+ v4l2_h264_build_p_ref_list(&b, reflists.p);
+ dpb_id = reflists.p;
+ }
+
+ for (i = 0; i < b.num_valid; i++) {
+ ref = get_ref_buf(ctx, dst, dpb_id[i]);
+
+ err = tegra_vde_h264_setup_frame(ctx, h264, &b, ref, dpb_id[i],
+ h264->dpb_frames_nb++);
+ if (err)
+ return err;
+
+ if (b.refs[dpb_id[i]].pic_order_count < b.cur_pic_order_count)
+ h264->dpb_ref_frames_with_earlier_poc_nb++;
+ }
+
+ return 0;
+}
+
+static unsigned int to_tegra_vde_h264_level_idc(unsigned int level_idc)
+{
+ switch (level_idc) {
+ case 11:
+ return 2;
+ case 12:
+ return 3;
+ case 13:
+ return 4;
+ case 20:
+ return 5;
+ case 21:
+ return 6;
+ case 22:
+ return 7;
+ case 30:
+ return 8;
+ case 31:
+ return 9;
+ case 32:
+ return 10;
+ case 40:
+ return 11;
+ case 41:
+ return 12;
+ case 42:
+ return 13;
+ case 50:
+ return 14;
+ default:
+ break;
+ }
+
+ return 15;
+}
+
+static int tegra_vde_h264_setup_context(struct tegra_ctx *ctx,
+ struct tegra_vde_h264_decoder_ctx *h264)
+{
+ struct tegra_ctx_h264 *h = &ctx->h264;
+ struct tegra_vde *vde = ctx->vde;
+ struct device *dev = vde->dev;
+ int err;
+
+ memset(h264, 0, sizeof(*h264));
+ memset(vde->frames, 0, sizeof(vde->frames));
+
+ tegra_vde_prepare_control_data(ctx, V4L2_CID_STATELESS_H264_DECODE_PARAMS);
+ tegra_vde_prepare_control_data(ctx, V4L2_CID_STATELESS_H264_SPS);
+ tegra_vde_prepare_control_data(ctx, V4L2_CID_STATELESS_H264_PPS);
+
+ /* CABAC unsupported by hardware, requires software preprocessing */
+ if (h->pps->flags & V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE)
+ return -EOPNOTSUPP;
+
+ if (h->sps->profile_idc == 66)
+ h264->baseline_profile = 1;
+
+ if (h->sps->flags & V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE)
+ h264->direct_8x8_inference_flag = 1;
+
+ if (h->pps->flags & V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED)
+ h264->constrained_intra_pred_flag = 1;
+
+ if (h->pps->flags & V4L2_H264_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT)
+ h264->deblocking_filter_control_present_flag = 1;
+
+ if (h->pps->flags & V4L2_H264_PPS_FLAG_BOTTOM_FIELD_PIC_ORDER_IN_FRAME_PRESENT)
+ h264->pic_order_present_flag = 1;
+
+ h264->level_idc = to_tegra_vde_h264_level_idc(h->sps->level_idc);
+ h264->log2_max_pic_order_cnt_lsb = h->sps->log2_max_pic_order_cnt_lsb_minus4 + 4;
+ h264->log2_max_frame_num = h->sps->log2_max_frame_num_minus4 + 4;
+ h264->pic_order_cnt_type = h->sps->pic_order_cnt_type;
+ h264->pic_width_in_mbs = h->sps->pic_width_in_mbs_minus1 + 1;
+ h264->pic_height_in_mbs = h->sps->pic_height_in_map_units_minus1 + 1;
+
+ h264->num_ref_idx_l0_active_minus1 = h->pps->num_ref_idx_l0_default_active_minus1;
+ h264->num_ref_idx_l1_active_minus1 = h->pps->num_ref_idx_l1_default_active_minus1;
+ h264->chroma_qp_index_offset = h->pps->chroma_qp_index_offset & 0x1f;
+ h264->pic_init_qp = h->pps->pic_init_qp_minus26 + 26;
+
+ err = tegra_vde_h264_setup_frames(ctx, h264);
+ if (err)
+ return err;
+
+ err = tegra_vde_validate_h264_ctx(dev, h264);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+int tegra_vde_h264_decode_run(struct tegra_ctx *ctx)
+{
+ struct vb2_v4l2_buffer *src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+ struct tegra_m2m_buffer *bitstream = vb_to_tegra_buf(&src->vb2_buf);
+ size_t bitstream_size = vb2_get_plane_payload(&src->vb2_buf, 0);
+ struct tegra_vde_h264_decoder_ctx h264;
+ struct tegra_vde *vde = ctx->vde;
+ int err;
+
+ err = tegra_vde_h264_setup_context(ctx, &h264);
+ if (err)
+ return err;
+
+ err = tegra_vde_decode_begin(vde, &h264, vde->frames,
+ bitstream->dma_addr[0],
+ bitstream_size);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+int tegra_vde_h264_decode_wait(struct tegra_ctx *ctx)
+{
+ return tegra_vde_decode_end(ctx->vde);
+}
diff --git a/drivers/staging/media/tegra-vde/v4l2.c b/drivers/staging/media/tegra-vde/v4l2.c
new file mode 100644
index 000000000000..bd8c207d5b54
--- /dev/null
+++ b/drivers/staging/media/tegra-vde/v4l2.c
@@ -0,0 +1,1018 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * NVIDIA Tegra Video decoder driver
+ *
+ * Copyright (C) 2019-2022 Dmitry Osipenko <digetx@gmail.com>
+ *
+ * Based on Cedrus driver by Bootlin.
+ * Copyright (C) 2016 Florent Revest <florent.revest@free-electrons.com>
+ * Copyright (C) 2018 Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+ *
+ * Based on Rockchip driver by Collabora.
+ * Copyright (C) 2019 Boris Brezillon <boris.brezillon@collabora.com>
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include "vde.h"
+
+static const struct v4l2_ctrl_config ctrl_cfgs[] = {
+ { .id = V4L2_CID_STATELESS_H264_DECODE_PARAMS, },
+ { .id = V4L2_CID_STATELESS_H264_SPS, },
+ { .id = V4L2_CID_STATELESS_H264_PPS, },
+ {
+ .id = V4L2_CID_STATELESS_H264_DECODE_MODE,
+ .min = V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED,
+ .max = V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED,
+ .def = V4L2_STATELESS_H264_DECODE_MODE_FRAME_BASED,
+ },
+ {
+ .id = V4L2_CID_STATELESS_H264_START_CODE,
+ .min = V4L2_STATELESS_H264_START_CODE_ANNEX_B,
+ .max = V4L2_STATELESS_H264_START_CODE_ANNEX_B,
+ .def = V4L2_STATELESS_H264_START_CODE_ANNEX_B,
+ },
+ {
+ .id = V4L2_CID_MPEG_VIDEO_H264_PROFILE,
+ .min = V4L2_MPEG_VIDEO_H264_PROFILE_BASELINE,
+ .max = V4L2_MPEG_VIDEO_H264_PROFILE_MAIN,
+ .def = V4L2_MPEG_VIDEO_H264_PROFILE_MAIN,
+ },
+ {
+ .id = V4L2_CID_MPEG_VIDEO_H264_LEVEL,
+ .min = V4L2_MPEG_VIDEO_H264_LEVEL_1_0,
+ .max = V4L2_MPEG_VIDEO_H264_LEVEL_5_1,
+ },
+};
+
+static inline struct tegra_ctx *fh_to_tegra_ctx(struct v4l2_fh *fh)
+{
+ return container_of(fh, struct tegra_ctx, fh);
+}
+
+static void tegra_set_control_data(struct tegra_ctx *ctx, void *data, u32 id)
+{
+ switch (id) {
+ case V4L2_CID_STATELESS_H264_DECODE_PARAMS:
+ ctx->h264.decode_params = data;
+ break;
+ case V4L2_CID_STATELESS_H264_SPS:
+ ctx->h264.sps = data;
+ break;
+ case V4L2_CID_STATELESS_H264_PPS:
+ ctx->h264.pps = data;
+ break;
+ }
+}
+
+void tegra_vde_prepare_control_data(struct tegra_ctx *ctx, u32 id)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(ctrl_cfgs); i++) {
+ if (ctx->ctrls[i]->id == id) {
+ tegra_set_control_data(ctx, ctx->ctrls[i]->p_cur.p, id);
+ return;
+ }
+ }
+
+ tegra_set_control_data(ctx, NULL, id);
+}
+
+static int tegra_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbufs,
+ unsigned int *num_planes,
+ unsigned int sizes[],
+ struct device *alloc_devs[])
+{
+ struct tegra_ctx *ctx = vb2_get_drv_priv(vq);
+ struct v4l2_format *f;
+ unsigned int i;
+
+ if (V4L2_TYPE_IS_OUTPUT(vq->type))
+ f = &ctx->coded_fmt;
+ else
+ f = &ctx->decoded_fmt;
+
+ if (*num_planes) {
+ if (*num_planes != f->fmt.pix_mp.num_planes)
+ return -EINVAL;
+
+ for (i = 0; i < f->fmt.pix_mp.num_planes; i++) {
+ if (sizes[i] < f->fmt.pix_mp.plane_fmt[i].sizeimage)
+ return -EINVAL;
+ }
+ } else {
+ *num_planes = f->fmt.pix_mp.num_planes;
+
+ for (i = 0; i < f->fmt.pix_mp.num_planes; i++)
+ sizes[i] = f->fmt.pix_mp.plane_fmt[i].sizeimage;
+ }
+
+ return 0;
+}
+
+static int tegra_buf_out_validate(struct vb2_buffer *vb)
+{
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ vbuf->field = V4L2_FIELD_NONE;
+ return 0;
+}
+
+static void __tegra_buf_cleanup(struct vb2_buffer *vb, unsigned int i)
+{
+ struct vb2_queue *vq = vb->vb2_queue;
+ struct tegra_ctx *ctx = vb2_get_drv_priv(vq);
+ struct tegra_m2m_buffer *tb = vb_to_tegra_buf(vb);
+
+ while (i--) {
+ if (tb->a[i]) {
+ tegra_vde_dmabuf_cache_unmap(ctx->vde, tb->a[i], true);
+ tb->a[i] = NULL;
+ }
+
+ if (tb->iova[i]) {
+ tegra_vde_iommu_unmap(ctx->vde, tb->iova[i]);
+ tb->iova[i] = NULL;
+ }
+ }
+
+ if (tb->aux) {
+ tegra_vde_free_bo(tb->aux);
+ tb->aux = NULL;
+ }
+}
+
+static int tegra_buf_init(struct vb2_buffer *vb)
+{
+ struct vb2_queue *vq = vb->vb2_queue;
+ struct tegra_ctx *ctx = vb2_get_drv_priv(vq);
+ struct tegra_m2m_buffer *tb = vb_to_tegra_buf(vb);
+ struct tegra_vde *vde = ctx->vde;
+ enum dma_data_direction dma_dir;
+ struct sg_table *sgt;
+ unsigned int i;
+ int err;
+
+ if (V4L2_TYPE_IS_CAPTURE(vq->type) && vb->num_planes > 1) {
+ /*
+ * Tegra decoder writes auxiliary data for I/P frames.
+ * This data is needed for decoding of B frames.
+ */
+ err = tegra_vde_alloc_bo(vde, &tb->aux, DMA_FROM_DEVICE,
+ vb2_plane_size(vb, 1));
+ if (err)
+ return err;
+ }
+
+ if (V4L2_TYPE_IS_OUTPUT(vq->type))
+ dma_dir = DMA_TO_DEVICE;
+ else
+ dma_dir = DMA_FROM_DEVICE;
+
+ for (i = 0; i < vb->num_planes; i++) {
+ if (vq->memory == VB2_MEMORY_DMABUF) {
+ get_dma_buf(vb->planes[i].dbuf);
+
+ err = tegra_vde_dmabuf_cache_map(vde, vb->planes[i].dbuf,
+ dma_dir, &tb->a[i],
+ &tb->dma_base[i]);
+ if (err) {
+ dma_buf_put(vb->planes[i].dbuf);
+ goto cleanup;
+ }
+
+ continue;
+ }
+
+ if (vde->domain) {
+ sgt = vb2_dma_sg_plane_desc(vb, i);
+
+ err = tegra_vde_iommu_map(vde, sgt, &tb->iova[i],
+ vb2_plane_size(vb, i));
+ if (err)
+ goto cleanup;
+
+ tb->dma_base[i] = iova_dma_addr(&vde->iova, tb->iova[i]);
+ } else {
+ tb->dma_base[i] = vb2_dma_contig_plane_dma_addr(vb, i);
+ }
+ }
+
+ return 0;
+
+cleanup:
+ __tegra_buf_cleanup(vb, i);
+
+ return err;
+}
+
+static void tegra_buf_cleanup(struct vb2_buffer *vb)
+{
+ __tegra_buf_cleanup(vb, vb->num_planes);
+}
+
+static int tegra_buf_prepare(struct vb2_buffer *vb)
+{
+ struct vb2_queue *vq = vb->vb2_queue;
+ struct tegra_ctx *ctx = vb2_get_drv_priv(vq);
+ struct tegra_m2m_buffer *tb = vb_to_tegra_buf(vb);
+ size_t hw_align, hw_size, hw_payload, size, offset;
+ struct v4l2_pix_format_mplane *pixfmt;
+ unsigned int i;
+ void *vb_data;
+
+ if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
+ hw_align = BSEV_ALIGN;
+ pixfmt = &ctx->coded_fmt.fmt.pix_mp;
+ } else {
+ hw_align = FRAMEID_ALIGN;
+ pixfmt = &ctx->decoded_fmt.fmt.pix_mp;
+ }
+
+ for (i = 0; i < vb->num_planes; i++) {
+ offset = vb->planes[i].data_offset;
+
+ if (offset & (hw_align - 1))
+ return -EINVAL;
+
+ if (V4L2_TYPE_IS_CAPTURE(vq->type)) {
+ size = pixfmt->plane_fmt[i].sizeimage;
+ hw_payload = ALIGN(size, VDE_ATOM);
+ } else {
+ size = vb2_get_plane_payload(vb, i) - offset;
+ hw_payload = ALIGN(size + VDE_ATOM, SXE_BUFFER);
+ }
+
+ hw_size = offset + hw_payload;
+
+ if (vb2_plane_size(vb, i) < hw_size)
+ return -EINVAL;
+
+ vb2_set_plane_payload(vb, i, hw_payload);
+
+ if (V4L2_TYPE_IS_OUTPUT(vq->type)) {
+ vb_data = vb2_plane_vaddr(vb, i);
+
+ /*
+ * Hardware requires zero-padding of coded data.
+ * Otherwise it will fail to parse the trailing
+ * data and abort the decoding.
+ */
+ if (vb_data)
+ memset(vb_data + offset + size, 0,
+ hw_size - offset - size);
+ }
+
+ tb->dma_addr[i] = tb->dma_base[i] + offset;
+ }
+
+ switch (pixfmt->pixelformat) {
+ case V4L2_PIX_FMT_YVU420M:
+ swap(tb->dma_addr[1], tb->dma_addr[2]);
+ break;
+ }
+
+ return 0;
+}
+
+static void tegra_buf_queue(struct vb2_buffer *vb)
+{
+ struct tegra_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+
+ v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
+}
+
+static void tegra_buf_request_complete(struct vb2_buffer *vb)
+{
+ struct tegra_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
+
+ v4l2_ctrl_request_complete(vb->req_obj.req, &ctx->hdl);
+}
+
+static int tegra_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ return 0;
+}
+
+static void tegra_stop_streaming(struct vb2_queue *vq)
+{
+ struct tegra_ctx *ctx = vb2_get_drv_priv(vq);
+
+ while (true) {
+ struct vb2_v4l2_buffer *vbuf;
+
+ if (V4L2_TYPE_IS_OUTPUT(vq->type))
+ vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ else
+ vbuf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
+
+ if (!vbuf)
+ break;
+
+ v4l2_ctrl_request_complete(vbuf->vb2_buf.req_obj.req, &ctx->hdl);
+ v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+ }
+}
+
+static const struct vb2_ops tegra_qops = {
+ .queue_setup = tegra_queue_setup,
+ .buf_init = tegra_buf_init,
+ .buf_cleanup = tegra_buf_cleanup,
+ .buf_prepare = tegra_buf_prepare,
+ .buf_queue = tegra_buf_queue,
+ .buf_out_validate = tegra_buf_out_validate,
+ .buf_request_complete = tegra_buf_request_complete,
+ .start_streaming = tegra_start_streaming,
+ .stop_streaming = tegra_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int tegra_queue_init(void *priv,
+ struct vb2_queue *src_vq,
+ struct vb2_queue *dst_vq)
+{
+ struct tegra_ctx *ctx = priv;
+ struct tegra_vde *vde = ctx->vde;
+ const struct vb2_mem_ops *mem_ops;
+ unsigned long dma_attrs;
+ int err;
+
+ /*
+ * TODO: Switch to use of vb2_dma_contig_memops uniformly once we
+ * will add IOMMU_DOMAIN support for video decoder to tegra-smmu
+ * driver. For now we need to stick with SG ops in order to be able
+ * to get SGT table easily. This is suboptimal since SG mappings are
+ * wasting CPU cache and we don't need that caching.
+ */
+ if (vde->domain)
+ mem_ops = &vb2_dma_sg_memops;
+ else
+ mem_ops = &vb2_dma_contig_memops;
+
+ dma_attrs = DMA_ATTR_WRITE_COMBINE;
+
+ src_vq->buf_struct_size = sizeof(struct tegra_m2m_buffer);
+ src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+ src_vq->io_modes = VB2_DMABUF | VB2_MMAP;
+ src_vq->supports_requests = true;
+ src_vq->requires_requests = true;
+ src_vq->lock = &vde->v4l2_lock;
+ src_vq->dma_attrs = dma_attrs;
+ src_vq->mem_ops = mem_ops;
+ src_vq->ops = &tegra_qops;
+ src_vq->drv_priv = ctx;
+ src_vq->dev = vde->dev;
+
+ err = vb2_queue_init(src_vq);
+ if (err) {
+ v4l2_err(&vde->v4l2_dev,
+ "failed to initialize src queue: %d\n", err);
+ return err;
+ }
+
+ /*
+ * We may need to zero the end of bitstream in kernel if userspace
+ * doesn't do that, hence kmap is needed for the coded data. It's not
+ * needed for framebuffers.
+ */
+ dma_attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
+
+ dst_vq->buf_struct_size = sizeof(struct tegra_m2m_buffer);
+ dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
+ dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ dst_vq->io_modes = VB2_DMABUF | VB2_MMAP;
+ dst_vq->lock = &vde->v4l2_lock;
+ dst_vq->dma_attrs = dma_attrs;
+ dst_vq->mem_ops = mem_ops;
+ dst_vq->ops = &tegra_qops;
+ dst_vq->drv_priv = ctx;
+ dst_vq->dev = vde->dev;
+
+ err = vb2_queue_init(dst_vq);
+ if (err) {
+ v4l2_err(&vde->v4l2_dev,
+ "failed to initialize dst queue: %d\n", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static void tegra_reset_fmt(struct tegra_ctx *ctx, struct v4l2_format *f,
+ u32 fourcc)
+{
+ memset(f, 0, sizeof(*f));
+ f->fmt.pix_mp.pixelformat = fourcc;
+ f->fmt.pix_mp.field = V4L2_FIELD_NONE;
+ f->fmt.pix_mp.xfer_func = V4L2_XFER_FUNC_DEFAULT;
+ f->fmt.pix_mp.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
+ f->fmt.pix_mp.colorspace = V4L2_COLORSPACE_REC709;
+ f->fmt.pix_mp.quantization = V4L2_QUANTIZATION_DEFAULT;
+}
+
+static void tegra_reset_coded_fmt(struct tegra_ctx *ctx)
+{
+ const struct tegra_vde_soc *soc = ctx->vde->soc;
+ struct v4l2_format *f = &ctx->coded_fmt;
+
+ ctx->coded_fmt_desc = &soc->coded_fmts[0];
+ tegra_reset_fmt(ctx, f, ctx->coded_fmt_desc->fourcc);
+
+ f->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+ f->fmt.pix_mp.width = ctx->coded_fmt_desc->frmsize.min_width;
+ f->fmt.pix_mp.height = ctx->coded_fmt_desc->frmsize.min_height;
+}
+
+static void tegra_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt,
+ u32 pixelformat, u32 width, u32 height)
+{
+ const struct v4l2_format_info *info = v4l2_format_info(pixelformat);
+ struct v4l2_plane_pix_format *plane;
+ unsigned int i;
+
+ switch (pixelformat) {
+ case V4L2_PIX_FMT_YUV420M:
+ case V4L2_PIX_FMT_YVU420M:
+ pixfmt->width = width;
+ pixfmt->height = height;
+ pixfmt->pixelformat = pixelformat;
+ pixfmt->num_planes = info->mem_planes;
+
+ for (i = 0; i < pixfmt->num_planes; i++) {
+ unsigned int hdiv = (i == 0) ? 1 : 2;
+ unsigned int vdiv = (i == 0) ? 1 : 2;
+
+ /*
+ * VDE is connected to Graphics Memory using 128bit port,
+ * all memory accesses are made using 16B atoms.
+ *
+ * V4L requires Cb/Cr strides to be exactly half of the
+ * Y stride, hence we're aligning Y to 16B x 2.
+ */
+ plane = &pixfmt->plane_fmt[i];
+ plane->bytesperline = ALIGN(width, VDE_ATOM * 2) / hdiv;
+ plane->sizeimage = plane->bytesperline * height / vdiv;
+ }
+
+ break;
+ }
+}
+
+static void tegra_reset_decoded_fmt(struct tegra_ctx *ctx)
+{
+ struct v4l2_format *f = &ctx->decoded_fmt;
+
+ tegra_reset_fmt(ctx, f, ctx->coded_fmt_desc->decoded_fmts[0]);
+ f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+ tegra_fill_pixfmt_mp(&f->fmt.pix_mp,
+ ctx->coded_fmt_desc->decoded_fmts[0],
+ ctx->coded_fmt.fmt.pix_mp.width,
+ ctx->coded_fmt.fmt.pix_mp.height);
+}
+
+static void tegra_job_finish(struct tegra_ctx *ctx,
+ enum vb2_buffer_state result)
+{
+ v4l2_m2m_buf_done_and_job_finish(ctx->vde->m2m, ctx->fh.m2m_ctx,
+ result);
+}
+
+static void tegra_decode_complete(struct work_struct *work)
+{
+ struct tegra_ctx *ctx = container_of(work, struct tegra_ctx, work);
+ int err;
+
+ err = ctx->coded_fmt_desc->decode_wait(ctx);
+ if (err)
+ tegra_job_finish(ctx, VB2_BUF_STATE_ERROR);
+ else
+ tegra_job_finish(ctx, VB2_BUF_STATE_DONE);
+}
+
+static int tegra_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strscpy(cap->bus_info, "platform:tegra-vde", sizeof(cap->bus_info));
+ strscpy(cap->driver, "tegra-vde", sizeof(cap->driver));
+ strscpy(cap->card, "tegra-vde", sizeof(cap->card));
+
+ return 0;
+}
+
+static int tegra_enum_decoded_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+
+ if (WARN_ON(!ctx->coded_fmt_desc))
+ return -EINVAL;
+
+ if (f->index >= ctx->coded_fmt_desc->num_decoded_fmts)
+ return -EINVAL;
+
+ f->pixelformat = ctx->coded_fmt_desc->decoded_fmts[f->index];
+
+ return 0;
+}
+
+static int tegra_g_decoded_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+
+ *f = ctx->decoded_fmt;
+ return 0;
+}
+
+static int tegra_try_decoded_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+ const struct tegra_coded_fmt_desc *coded_desc;
+ unsigned int i;
+
+ /*
+ * The codec context should point to a coded format desc, if the format
+ * on the coded end has not been set yet, it should point to the
+ * default value.
+ */
+ coded_desc = ctx->coded_fmt_desc;
+ if (WARN_ON(!coded_desc))
+ return -EINVAL;
+
+ if (!coded_desc->num_decoded_fmts)
+ return -EINVAL;
+
+ for (i = 0; i < coded_desc->num_decoded_fmts; i++) {
+ if (coded_desc->decoded_fmts[i] == pix_mp->pixelformat)
+ break;
+ }
+
+ if (i == coded_desc->num_decoded_fmts)
+ pix_mp->pixelformat = coded_desc->decoded_fmts[0];
+
+ /* always apply the frmsize constraint of the coded end */
+ v4l2_apply_frmsize_constraints(&pix_mp->width,
+ &pix_mp->height,
+ &coded_desc->frmsize);
+
+ tegra_fill_pixfmt_mp(pix_mp, pix_mp->pixelformat,
+ pix_mp->width, pix_mp->height);
+ pix_mp->field = V4L2_FIELD_NONE;
+
+ return 0;
+}
+
+static int tegra_s_decoded_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+ struct vb2_queue *vq;
+ int err;
+
+ /* change not allowed if queue is busy */
+ vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+ if (vb2_is_busy(vq))
+ return -EBUSY;
+
+ err = tegra_try_decoded_fmt(file, priv, f);
+ if (err)
+ return err;
+
+ ctx->decoded_fmt = *f;
+
+ return 0;
+}
+
+static int tegra_enum_coded_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+ const struct tegra_vde_soc *soc = ctx->vde->soc;
+
+ if (f->index >= soc->num_coded_fmts)
+ return -EINVAL;
+
+ f->pixelformat = soc->coded_fmts[f->index].fourcc;
+
+ return 0;
+}
+
+static int tegra_g_coded_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+
+ *f = ctx->coded_fmt;
+ return 0;
+}
+
+static const struct tegra_coded_fmt_desc *
+tegra_find_coded_fmt_desc(struct tegra_ctx *ctx, u32 fourcc)
+{
+ const struct tegra_vde_soc *soc = ctx->vde->soc;
+ unsigned int i;
+
+ for (i = 0; i < soc->num_coded_fmts; i++) {
+ if (soc->coded_fmts[i].fourcc == fourcc)
+ return &soc->coded_fmts[i];
+ }
+
+ return NULL;
+}
+
+static int tegra_try_coded_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+ const struct tegra_vde_soc *soc = ctx->vde->soc;
+ int size = pix_mp->plane_fmt[0].sizeimage;
+ const struct tegra_coded_fmt_desc *desc;
+
+ desc = tegra_find_coded_fmt_desc(ctx, pix_mp->pixelformat);
+ if (!desc) {
+ pix_mp->pixelformat = soc->coded_fmts[0].fourcc;
+ desc = &soc->coded_fmts[0];
+ }
+
+ v4l2_apply_frmsize_constraints(&pix_mp->width,
+ &pix_mp->height,
+ &desc->frmsize);
+
+ pix_mp->plane_fmt[0].sizeimage = max(ALIGN(size, SXE_BUFFER), SZ_2M);
+ pix_mp->field = V4L2_FIELD_NONE;
+ pix_mp->num_planes = 1;
+
+ return 0;
+}
+
+static int tegra_s_coded_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+ struct v4l2_m2m_ctx *m2m_ctx = ctx->fh.m2m_ctx;
+ const struct tegra_coded_fmt_desc *desc;
+ struct vb2_queue *peer_vq, *vq;
+ struct v4l2_format *cap_fmt;
+ int err;
+
+ /*
+ * In order to support dynamic resolution change, the decoder admits
+ * a resolution change, as long as the pixelformat remains. Can't be
+ * done if streaming.
+ */
+ vq = v4l2_m2m_get_vq(m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
+ if (vb2_is_streaming(vq) ||
+ (vb2_is_busy(vq) &&
+ f->fmt.pix_mp.pixelformat != ctx->coded_fmt.fmt.pix_mp.pixelformat))
+ return -EBUSY;
+
+ /*
+ * Since format change on the OUTPUT queue will reset the CAPTURE
+ * queue, we can't allow doing so when the CAPTURE queue has buffers
+ * allocated.
+ */
+ peer_vq = v4l2_m2m_get_vq(m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
+ if (vb2_is_busy(peer_vq))
+ return -EBUSY;
+
+ err = tegra_try_coded_fmt(file, priv, f);
+ if (err)
+ return err;
+
+ desc = tegra_find_coded_fmt_desc(ctx, f->fmt.pix_mp.pixelformat);
+ if (!desc)
+ return -EINVAL;
+
+ ctx->coded_fmt_desc = desc;
+ ctx->coded_fmt = *f;
+
+ /*
+ * Current decoded format might have become invalid with newly
+ * selected codec, so reset it to default just to be safe and
+ * keep internal driver state sane. User is mandated to set
+ * the decoded format again after we return, so we don't need
+ * anything smarter.
+ *
+ * Note that this will propagates any size changes to the decoded format.
+ */
+ tegra_reset_decoded_fmt(ctx);
+
+ /* propagate colorspace information to capture */
+ cap_fmt = &ctx->decoded_fmt;
+ cap_fmt->fmt.pix_mp.xfer_func = f->fmt.pix_mp.xfer_func;
+ cap_fmt->fmt.pix_mp.ycbcr_enc = f->fmt.pix_mp.ycbcr_enc;
+ cap_fmt->fmt.pix_mp.colorspace = f->fmt.pix_mp.colorspace;
+ cap_fmt->fmt.pix_mp.quantization = f->fmt.pix_mp.quantization;
+
+ return 0;
+}
+
+static int tegra_enum_framesizes(struct file *file, void *priv,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(priv);
+ const struct tegra_coded_fmt_desc *fmt;
+
+ if (fsize->index)
+ return -EINVAL;
+
+ fmt = tegra_find_coded_fmt_desc(ctx, fsize->pixel_format);
+ if (!fmt)
+ return -EINVAL;
+
+ fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
+ fsize->stepwise = fmt->frmsize;
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops tegra_v4l2_ioctl_ops = {
+ .vidioc_querycap = tegra_querycap,
+ .vidioc_enum_framesizes = tegra_enum_framesizes,
+
+ .vidioc_try_fmt_vid_out_mplane = tegra_try_coded_fmt,
+ .vidioc_g_fmt_vid_out_mplane = tegra_g_coded_fmt,
+ .vidioc_s_fmt_vid_out_mplane = tegra_s_coded_fmt,
+ .vidioc_enum_fmt_vid_out = tegra_enum_coded_fmt,
+
+ .vidioc_try_fmt_vid_cap_mplane = tegra_try_decoded_fmt,
+ .vidioc_g_fmt_vid_cap_mplane = tegra_g_decoded_fmt,
+ .vidioc_s_fmt_vid_cap_mplane = tegra_s_decoded_fmt,
+ .vidioc_enum_fmt_vid_cap = tegra_enum_decoded_fmt,
+
+ .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
+ .vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
+ .vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
+ .vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
+ .vidioc_prepare_buf = v4l2_m2m_ioctl_prepare_buf,
+ .vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
+ .vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
+
+ .vidioc_streamon = v4l2_m2m_ioctl_streamon,
+ .vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
+
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static int tegra_init_ctrls(struct tegra_ctx *ctx)
+{
+ unsigned int i;
+ int err;
+
+ err = v4l2_ctrl_handler_init(&ctx->hdl, ARRAY_SIZE(ctrl_cfgs));
+ if (err)
+ return err;
+
+ for (i = 0; i < ARRAY_SIZE(ctrl_cfgs); i++) {
+ ctx->ctrls[i] = v4l2_ctrl_new_custom(&ctx->hdl, &ctrl_cfgs[i],
+ NULL);
+ if (ctx->hdl.error) {
+ err = ctx->hdl.error;
+ goto free_ctrls;
+ }
+ }
+
+ err = v4l2_ctrl_handler_setup(&ctx->hdl);
+ if (err)
+ goto free_ctrls;
+
+ ctx->fh.ctrl_handler = &ctx->hdl;
+
+ return 0;
+
+free_ctrls:
+ v4l2_ctrl_handler_free(&ctx->hdl);
+
+ return err;
+}
+
+static int tegra_init_m2m(struct tegra_ctx *ctx)
+{
+ ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(ctx->vde->m2m,
+ ctx, tegra_queue_init);
+ if (IS_ERR(ctx->fh.m2m_ctx))
+ return PTR_ERR(ctx->fh.m2m_ctx);
+
+ return 0;
+}
+
+static int tegra_open(struct file *file)
+{
+ struct tegra_vde *vde = video_drvdata(file);
+ struct tegra_ctx *ctx;
+ int err;
+
+ ctx = kzalloc(offsetof(struct tegra_ctx, ctrls[ARRAY_SIZE(ctrl_cfgs)]),
+ GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->vde = vde;
+ v4l2_fh_init(&ctx->fh, video_devdata(file));
+ INIT_WORK(&ctx->work, tegra_decode_complete);
+
+ err = tegra_init_ctrls(ctx);
+ if (err) {
+ v4l2_err(&vde->v4l2_dev, "failed to add controls: %d\n", err);
+ goto free_ctx;
+ }
+
+ err = tegra_init_m2m(ctx);
+ if (err) {
+ v4l2_err(&vde->v4l2_dev, "failed to initialize m2m: %d\n", err);
+ goto free_ctrls;
+ }
+
+ file->private_data = &ctx->fh;
+ v4l2_fh_add(&ctx->fh);
+
+ tegra_reset_coded_fmt(ctx);
+ tegra_try_coded_fmt(file, file->private_data, &ctx->coded_fmt);
+
+ tegra_reset_decoded_fmt(ctx);
+ tegra_try_decoded_fmt(file, file->private_data, &ctx->decoded_fmt);
+
+ return 0;
+
+free_ctrls:
+ v4l2_ctrl_handler_free(&ctx->hdl);
+free_ctx:
+ kfree(ctx);
+
+ return err;
+}
+
+static int tegra_release(struct file *file)
+{
+ struct v4l2_fh *fh = file->private_data;
+ struct tegra_ctx *ctx = fh_to_tegra_ctx(fh);
+ struct tegra_vde *vde = ctx->vde;
+
+ v4l2_fh_del(fh);
+ v4l2_m2m_ctx_release(fh->m2m_ctx);
+ v4l2_ctrl_handler_free(&ctx->hdl);
+ v4l2_fh_exit(fh);
+ kfree(ctx);
+
+ tegra_vde_dmabuf_cache_unmap_sync(vde);
+
+ return 0;
+}
+
+static const struct v4l2_file_operations tegra_v4l2_fops = {
+ .owner = THIS_MODULE,
+ .open = tegra_open,
+ .poll = v4l2_m2m_fop_poll,
+ .mmap = v4l2_m2m_fop_mmap,
+ .release = tegra_release,
+ .unlocked_ioctl = video_ioctl2,
+};
+
+static void tegra_device_run(void *priv)
+{
+ struct tegra_ctx *ctx = priv;
+ struct vb2_v4l2_buffer *src = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+ struct media_request *src_req = src->vb2_buf.req_obj.req;
+ int err;
+
+ v4l2_ctrl_request_setup(src_req, &ctx->hdl);
+
+ err = ctx->coded_fmt_desc->decode_run(ctx);
+
+ v4l2_ctrl_request_complete(src_req, &ctx->hdl);
+
+ if (err)
+ tegra_job_finish(ctx, VB2_BUF_STATE_ERROR);
+ else
+ queue_work(ctx->vde->wq, &ctx->work);
+}
+
+static const struct v4l2_m2m_ops tegra_v4l2_m2m_ops = {
+ .device_run = tegra_device_run,
+};
+
+static int tegra_request_validate(struct media_request *req)
+{
+ unsigned int count;
+
+ count = vb2_request_buffer_cnt(req);
+ if (!count)
+ return -ENOENT;
+ else if (count > 1)
+ return -EINVAL;
+
+ return vb2_request_validate(req);
+}
+
+static const struct media_device_ops tegra_media_device_ops = {
+ .req_validate = tegra_request_validate,
+ .req_queue = v4l2_m2m_request_queue,
+};
+
+int tegra_vde_v4l2_init(struct tegra_vde *vde)
+{
+ struct device *dev = vde->dev;
+ int err;
+
+ mutex_init(&vde->v4l2_lock);
+ media_device_init(&vde->mdev);
+ video_set_drvdata(&vde->vdev, vde);
+
+ vde->vdev.lock = &vde->v4l2_lock,
+ vde->vdev.fops = &tegra_v4l2_fops,
+ vde->vdev.vfl_dir = VFL_DIR_M2M,
+ vde->vdev.release = video_device_release_empty,
+ vde->vdev.v4l2_dev = &vde->v4l2_dev;
+ vde->vdev.ioctl_ops = &tegra_v4l2_ioctl_ops,
+ vde->vdev.device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING,
+
+ vde->v4l2_dev.mdev = &vde->mdev;
+ vde->mdev.ops = &tegra_media_device_ops;
+ vde->mdev.dev = dev;
+
+ strscpy(vde->mdev.model, "tegra-vde", sizeof(vde->mdev.model));
+ strscpy(vde->vdev.name, "tegra-vde", sizeof(vde->vdev.name));
+ strscpy(vde->mdev.bus_info, "platform:tegra-vde",
+ sizeof(vde->mdev.bus_info));
+
+ vde->wq = create_workqueue("tegra-vde");
+ if (!vde->wq)
+ return -ENOMEM;
+
+ err = media_device_register(&vde->mdev);
+ if (err) {
+ dev_err(dev, "failed to register media device: %d\n", err);
+ goto clean_up_media_device;
+ }
+
+ err = v4l2_device_register(dev, &vde->v4l2_dev);
+ if (err) {
+ dev_err(dev, "failed to register v4l2 device: %d\n", err);
+ goto unreg_media_device;
+ }
+
+ err = video_register_device(&vde->vdev, VFL_TYPE_VIDEO, -1);
+ if (err) {
+ dev_err(dev, "failed to register video device: %d\n", err);
+ goto unreg_v4l2;
+ }
+
+ vde->m2m = v4l2_m2m_init(&tegra_v4l2_m2m_ops);
+ err = PTR_ERR_OR_ZERO(vde->m2m);
+ if (err) {
+ dev_err(dev, "failed to initialize m2m device: %d\n", err);
+ goto unreg_video_device;
+ }
+
+ err = v4l2_m2m_register_media_controller(vde->m2m, &vde->vdev,
+ MEDIA_ENT_F_PROC_VIDEO_DECODER);
+ if (err) {
+ dev_err(dev, "failed to register media controller: %d\n", err);
+ goto release_m2m;
+ }
+
+ v4l2_info(&vde->v4l2_dev, "v4l2 device registered as /dev/video%d\n",
+ vde->vdev.num);
+
+ return 0;
+
+release_m2m:
+ v4l2_m2m_release(vde->m2m);
+unreg_video_device:
+ video_unregister_device(&vde->vdev);
+unreg_v4l2:
+ v4l2_device_unregister(&vde->v4l2_dev);
+unreg_media_device:
+ media_device_unregister(&vde->mdev);
+clean_up_media_device:
+ media_device_cleanup(&vde->mdev);
+
+ destroy_workqueue(vde->wq);
+
+ return err;
+}
+
+void tegra_vde_v4l2_deinit(struct tegra_vde *vde)
+{
+ v4l2_m2m_unregister_media_controller(vde->m2m);
+ v4l2_m2m_release(vde->m2m);
+
+ video_unregister_device(&vde->vdev);
+ v4l2_device_unregister(&vde->v4l2_dev);
+
+ media_device_unregister(&vde->mdev);
+ media_device_cleanup(&vde->mdev);
+
+ destroy_workqueue(vde->wq);
+}
diff --git a/drivers/staging/media/tegra-vde/vde.c b/drivers/staging/media/tegra-vde/vde.c
index 36f5595c0fd8..c147d58c3bfb 100644
--- a/drivers/staging/media/tegra-vde/vde.c
+++ b/drivers/staging/media/tegra-vde/vde.c
@@ -53,10 +53,10 @@ void tegra_vde_set_bits(struct tegra_vde *vde, u32 mask,
tegra_vde_writel(vde, value | mask, base, offset);
}

-static int tegra_vde_alloc_bo(struct tegra_vde *vde,
- struct tegra_vde_bo **ret_bo,
- enum dma_data_direction dma_dir,
- size_t size)
+int tegra_vde_alloc_bo(struct tegra_vde *vde,
+ struct tegra_vde_bo **ret_bo,
+ enum dma_data_direction dma_dir,
+ size_t size)
{
struct device *dev = vde->miscdev.parent;
struct tegra_vde_bo *bo;
@@ -126,7 +126,7 @@ static int tegra_vde_alloc_bo(struct tegra_vde *vde,
return err;
}

-static void tegra_vde_free_bo(struct tegra_vde_bo *bo)
+void tegra_vde_free_bo(struct tegra_vde_bo *bo)
{
struct tegra_vde *vde = bo->vde;
struct device *dev = vde->miscdev.parent;
@@ -332,6 +332,8 @@ static int tegra_vde_ioctl_decode_h264(struct tegra_vde *vde,

dpb_frames[i].flags = frames[i].flags;
dpb_frames[i].frame_num = frames[i].frame_num;
+ dpb_frames[i].luma_atoms_pitch = ctx.pic_width_in_mbs;
+ dpb_frames[i].chroma_atoms_pitch = cstride / VDE_ATOM;

dma_dir = (i == 0) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;

@@ -626,8 +628,16 @@ static int tegra_vde_probe(struct platform_device *pdev)
goto err_free_secure_bo;
}

+ err = tegra_vde_v4l2_init(vde);
+ if (err) {
+ dev_err(dev, "Failed to initialize V4L2: %d\n", err);
+ goto misc_unreg;
+ }
+
return 0;

+misc_unreg:
+ misc_deregister(&vde->miscdev);
err_free_secure_bo:
tegra_vde_free_bo(vde->secure_bo);
err_pm_runtime:
@@ -648,6 +658,7 @@ static int tegra_vde_remove(struct platform_device *pdev)
struct tegra_vde *vde = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;

+ tegra_vde_v4l2_deinit(vde);
misc_deregister(&vde->miscdev);

tegra_vde_free_bo(vde->secure_bo);
@@ -722,20 +733,73 @@ static const struct dev_pm_ops tegra_vde_pm_ops = {
tegra_vde_pm_resume)
};

+static const u32 tegra124_decoded_fmts[] = {
+ /* TBD: T124 supports only a non-standard Tegra tiled format */
+};
+
+static const struct tegra_coded_fmt_desc tegra124_coded_fmts[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_H264_SLICE,
+ .frmsize = {
+ .min_width = 16,
+ .max_width = 1920,
+ .step_width = 16,
+ .min_height = 16,
+ .max_height = 2032,
+ .step_height = 16,
+ },
+ .num_decoded_fmts = ARRAY_SIZE(tegra124_decoded_fmts),
+ .decoded_fmts = tegra124_decoded_fmts,
+ .decode_run = tegra_vde_h264_decode_run,
+ .decode_wait = tegra_vde_h264_decode_wait,
+ },
+};
+
+static const u32 tegra20_decoded_fmts[] = {
+ V4L2_PIX_FMT_YUV420M,
+ V4L2_PIX_FMT_YVU420M,
+};
+
+static const struct tegra_coded_fmt_desc tegra20_coded_fmts[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_H264_SLICE,
+ .frmsize = {
+ .min_width = 16,
+ .max_width = 1920,
+ .step_width = 16,
+ .min_height = 16,
+ .max_height = 2032,
+ .step_height = 16,
+ },
+ .num_decoded_fmts = ARRAY_SIZE(tegra20_decoded_fmts),
+ .decoded_fmts = tegra20_decoded_fmts,
+ .decode_run = tegra_vde_h264_decode_run,
+ .decode_wait = tegra_vde_h264_decode_wait,
+ },
+};
+
static const struct tegra_vde_soc tegra124_vde_soc = {
.supports_ref_pic_marking = true,
+ .coded_fmts = tegra124_coded_fmts,
+ .num_coded_fmts = ARRAY_SIZE(tegra124_coded_fmts),
};

static const struct tegra_vde_soc tegra114_vde_soc = {
.supports_ref_pic_marking = true,
+ .coded_fmts = tegra20_coded_fmts,
+ .num_coded_fmts = ARRAY_SIZE(tegra20_coded_fmts),
};

static const struct tegra_vde_soc tegra30_vde_soc = {
.supports_ref_pic_marking = false,
+ .coded_fmts = tegra20_coded_fmts,
+ .num_coded_fmts = ARRAY_SIZE(tegra20_coded_fmts),
};

static const struct tegra_vde_soc tegra20_vde_soc = {
.supports_ref_pic_marking = false,
+ .coded_fmts = tegra20_coded_fmts,
+ .num_coded_fmts = ARRAY_SIZE(tegra20_coded_fmts),
};

static const struct of_device_id tegra_vde_of_match[] = {
diff --git a/drivers/staging/media/tegra-vde/vde.h b/drivers/staging/media/tegra-vde/vde.h
index 8ba6a71e3e40..e0396bb0b986 100644
--- a/drivers/staging/media/tegra-vde/vde.h
+++ b/drivers/staging/media/tegra-vde/vde.h
@@ -15,6 +15,16 @@
#include <linux/miscdevice.h>
#include <linux/mutex.h>
#include <linux/types.h>
+#include <linux/workqueue.h>
+
+#include <media/media-device.h>
+#include <media/videobuf2-dma-contig.h>
+#include <media/videobuf2-dma-sg.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-mem2mem.h>

#define ICMDQUE_WR 0x00
#define CMDQUE_CONTROL 0x08
@@ -25,9 +35,15 @@
#define BSE_ICMDQUE_EMPTY BIT(3)
#define BSE_DMA_BUSY BIT(23)

+#define BSEV_ALIGN SZ_1
+#define FRAMEID_ALIGN SZ_256
+#define SXE_BUFFER SZ_32K
+#define VDE_ATOM SZ_16
+
struct clk;
struct dma_buf;
struct gen_pool;
+struct tegra_ctx;
struct iommu_group;
struct iommu_domain;
struct reset_control;
@@ -46,10 +62,23 @@ struct tegra_video_frame {
dma_addr_t aux_addr;
u32 frame_num;
u32 flags;
+ u32 luma_atoms_pitch;
+ u32 chroma_atoms_pitch;
+};
+
+struct tegra_coded_fmt_desc {
+ u32 fourcc;
+ struct v4l2_frmsize_stepwise frmsize;
+ unsigned int num_decoded_fmts;
+ const u32 *decoded_fmts;
+ int (*decode_run)(struct tegra_ctx *ctx);
+ int (*decode_wait)(struct tegra_ctx *ctx);
};

struct tegra_vde_soc {
bool supports_ref_pic_marking;
+ const struct tegra_coded_fmt_desc *coded_fmts;
+ u32 num_coded_fmts;
};

struct tegra_vde_bo {
@@ -94,8 +123,60 @@ struct tegra_vde {
dma_addr_t bitstream_data_addr;
dma_addr_t iram_lists_addr;
u32 *iram;
+ struct v4l2_device v4l2_dev;
+ struct v4l2_m2m_dev *m2m;
+ struct media_device mdev;
+ struct video_device vdev;
+ struct mutex v4l2_lock;
+ struct workqueue_struct *wq;
+ struct tegra_video_frame frames[V4L2_H264_NUM_DPB_ENTRIES + 1];
+};
+
+int tegra_vde_alloc_bo(struct tegra_vde *vde,
+ struct tegra_vde_bo **ret_bo,
+ enum dma_data_direction dma_dir,
+ size_t size);
+void tegra_vde_free_bo(struct tegra_vde_bo *bo);
+
+struct tegra_ctx_h264 {
+ const struct v4l2_ctrl_h264_decode_params *decode_params;
+ const struct v4l2_ctrl_h264_sps *sps;
+ const struct v4l2_ctrl_h264_pps *pps;
+};
+
+struct tegra_ctx {
+ struct tegra_vde *vde;
+ struct tegra_ctx_h264 h264;
+ struct work_struct work;
+ struct v4l2_fh fh;
+ struct v4l2_ctrl_handler hdl;
+ struct v4l2_format coded_fmt;
+ struct v4l2_format decoded_fmt;
+ const struct tegra_coded_fmt_desc *coded_fmt_desc;
+ struct v4l2_ctrl *ctrls[];
+};
+
+struct tegra_m2m_buffer {
+ struct v4l2_m2m_buffer m2m;
+ struct dma_buf_attachment *a[VB2_MAX_PLANES];
+ dma_addr_t dma_base[VB2_MAX_PLANES];
+ dma_addr_t dma_addr[VB2_MAX_PLANES];
+ struct iova *iova[VB2_MAX_PLANES];
+ struct tegra_vde_bo *aux;
+ bool b_frame;
};

+static inline struct tegra_m2m_buffer *
+vb_to_tegra_buf(struct vb2_buffer *vb)
+{
+ struct v4l2_m2m_buffer *m2m = container_of(vb, struct v4l2_m2m_buffer,
+ vb.vb2_buf);
+
+ return container_of(m2m, struct tegra_m2m_buffer, m2m);
+}
+
+void tegra_vde_prepare_control_data(struct tegra_ctx *ctx, u32 id);
+
void tegra_vde_writel(struct tegra_vde *vde, u32 value, void __iomem *base,
u32 offset);
u32 tegra_vde_readl(struct tegra_vde *vde, void __iomem *base, u32 offset);
@@ -111,6 +192,8 @@ int tegra_vde_decode_h264(struct tegra_vde *vde,
struct tegra_video_frame *dpb_frames,
dma_addr_t bitstream_data_addr,
size_t bitstream_data_size);
+int tegra_vde_h264_decode_run(struct tegra_ctx *ctx);
+int tegra_vde_h264_decode_wait(struct tegra_ctx *ctx);

int tegra_vde_iommu_init(struct tegra_vde *vde);
void tegra_vde_iommu_deinit(struct tegra_vde *vde);
@@ -164,4 +247,7 @@ tegra_vde_reg_base_name(struct tegra_vde *vde, void __iomem *base)
return "???";
}

+int tegra_vde_v4l2_init(struct tegra_vde *vde);
+void tegra_vde_v4l2_deinit(struct tegra_vde *vde);
+
#endif /* TEGRA_VDE_H */
--
2.34.1