[Patch v3 14/15] media: s5p-mfc: DPB Count Independent of VIDIOC_REQBUF

aakarsh jain
2022-10-12T03:51:34Z

From: Smitha T Murthy <smitha.t@samsung.com>

This patch allows allocation of DPB buffers based on MFC requirement
so codec buffers allocations has been moved after state
MFCINST_HEAD_PRODUCED. It is taken care that codec buffer allocation
is performed in process context from userspace IOCTL call.

Cc: linux-fsd@tesla.com
Signed-off-by: Smitha T Murthy <smitha.t@samsung.com>
Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
---
.../platform/samsung/s5p-mfc/s5p_mfc_enc.c | 17 ++---------------
.../platform/samsung/s5p-mfc/s5p_mfc_opr_v6.c | 9 ++++++++-
2 files changed, 10 insertions(+), 16 deletions(-)

diff --git a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c
index 22f6ebc28e40..425dcab0cd1c 100644
--- a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c
+++ b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_enc.c
@@ -1340,7 +1340,6 @@ static int enc_post_seq_start(struct s5p_mfc_ctx *ctx)
struct s5p_mfc_dev *dev = ctx->dev;
struct s5p_mfc_enc_params *p = &ctx->enc_params;
struct s5p_mfc_buf *dst_mb;
- unsigned int enc_pb_count;

if (p->seq_hdr_mode == V4L2_MPEG_VIDEO_HEADER_MODE_SEPARATE) {
if (!list_empty(&ctx->dst_queue)) {
@@ -1362,10 +1361,8 @@ static int enc_post_seq_start(struct s5p_mfc_ctx *ctx)
set_work_bit_irqsave(ctx);
s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
} else {
- enc_pb_count = s5p_mfc_hw_call(dev->mfc_ops,
+ ctx->pb_count = s5p_mfc_hw_call(dev->mfc_ops,
get_enc_dpb_count, dev);
- if (ctx->pb_count < enc_pb_count)
- ctx->pb_count = enc_pb_count;
if (FW_HAS_E_MIN_SCRATCH_BUF(dev)) {
ctx->scratch_buf_size = s5p_mfc_hw_call(dev->mfc_ops,
get_e_min_scratch_buf_size, dev);
@@ -1731,14 +1728,6 @@ static int vidioc_reqbufs(struct file *file, void *priv,
}
ctx->capture_state = QUEUE_BUFS_REQUESTED;

- ret = s5p_mfc_hw_call(ctx->dev->mfc_ops,
- alloc_codec_buffers, ctx);
- if (ret) {
- mfc_err("Failed to allocate encoding buffers\n");
- reqbufs->count = 0;
- ret = vb2_reqbufs(&ctx->vq_dst, reqbufs);
- return -ENOMEM;
- }
} else if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
if (reqbufs->count == 0) {
mfc_debug(2, "Freeing buffers\n");
@@ -1754,15 +1743,13 @@ static int vidioc_reqbufs(struct file *file, void *priv,
return -EINVAL;
}

- if (IS_MFCV6_PLUS(dev)) {
+ if (IS_MFCV6_PLUS(dev) && (!IS_MFCV12(dev))) {
/* Check for min encoder buffers */
if (ctx->pb_count &&
(reqbufs->count < ctx->pb_count)) {
reqbufs->count = ctx->pb_count;
mfc_debug(2, "Minimum %d output buffers needed\n",
ctx->pb_count);
- } else {
- ctx->pb_count = reqbufs->count;
}
}

diff --git a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_opr_v6.c b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_opr_v6.c
index c4953419be0e..c00debe5db76 100644
--- a/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_opr_v6.c
+++ b/drivers/media/platform/samsung/s5p-mfc/s5p_mfc_opr_v6.c
@@ -377,7 +377,6 @@ static int s5p_mfc_alloc_codec_buffers_v6(struct s5p_mfc_ctx *ctx)
default:
break;
}
-
/* Allocate only if memory from bank 1 is necessary */
if (ctx->bank1.size > 0) {
ret = s5p_mfc_alloc_generic_buf(dev, BANK_L_CTX, &ctx->bank1);
@@ -2255,6 +2254,14 @@ static inline int s5p_mfc_run_init_enc_buffers(struct s5p_mfc_ctx *ctx)
struct s5p_mfc_dev *dev = ctx->dev;
int ret;

+ ret = s5p_mfc_hw_call(ctx->dev->mfc_ops,
+ alloc_codec_buffers, ctx);
+ if (ret) {
+ mfc_err("Failed to allocate encoding buffers\n");
+ return -ENOMEM;
+ }
+ mfc_debug(2, "Allocated Internal Encoding Buffers\n");
+
dev->curr_ctx = ctx->num;
ret = s5p_mfc_set_enc_ref_buffer_v6(ctx);
if (ret) {
--
2.17.1