From: Philipp Zabel Date: Tue, 24 Mar 2015 17:30:51 +0000 (-0300) Subject: [media] coda: allocate per-context buffers from REQBUFS X-Git-Tag: v4.1-rc1~59^2~1^2~11 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=73751da61c00db9914ae1c47a25f7462722bc76b;p=linux.git [media] coda: allocate per-context buffers from REQBUFS Allocate the per-context buffers from REQBUFS instead in start_encoding or start_decoding. This allows to stop and start streaming independently of buffer (re)allocation Signed-off-by: Philipp Zabel Signed-off-by: Kamil Debski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/coda/coda-bit.c b/drivers/media/platform/coda/coda-bit.c index 856b542b35b9..12b93867e665 100644 --- a/drivers/media/platform/coda/coda-bit.c +++ b/drivers/media/platform/coda/coda-bit.c @@ -709,6 +709,27 @@ int coda_check_firmware(struct coda_dev *dev) * Encoder context operations */ +static int coda_encoder_reqbufs(struct coda_ctx *ctx, + struct v4l2_requestbuffers *rb) +{ + struct coda_q_data *q_data_src; + int ret; + + if (rb->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) + return 0; + + if (rb->count) { + q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); + ret = coda_alloc_context_buffers(ctx, q_data_src); + if (ret < 0) + return ret; + } else { + coda_free_context_buffers(ctx); + } + + return 0; +} + static int coda_start_encoding(struct coda_ctx *ctx) { struct coda_dev *dev = ctx->dev; @@ -725,11 +746,6 @@ static int coda_start_encoding(struct coda_ctx *ctx) q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); dst_fourcc = q_data_dst->fourcc; - /* Allocate per-instance buffers */ - ret = coda_alloc_context_buffers(ctx, q_data_src); - if (ret < 0) - return ret; - buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx); bitstream_buf = vb2_dma_contig_plane_dma_addr(buf, 0); bitstream_size = q_data_dst->sizeimage; @@ -1311,7 +1327,6 @@ static void coda_seq_end_work(struct work_struct *work) ctx->bitstream.vaddr, ctx->bitstream.size); coda_free_framebuffers(ctx); - coda_free_context_buffers(ctx); mutex_unlock(&dev->coda_mutex); mutex_unlock(&ctx->buffer_mutex); @@ -1327,6 +1342,7 @@ static void coda_bit_release(struct coda_ctx *ctx) const struct coda_context_ops coda_bit_encode_ops = { .queue_init = coda_encoder_queue_init, + .reqbufs = coda_encoder_reqbufs, .start_streaming = coda_start_encoding, .prepare_run = coda_prepare_encode, .finish_run = coda_finish_encode, @@ -1338,6 +1354,27 @@ const struct coda_context_ops coda_bit_encode_ops = { * Decoder context operations */ +static int coda_decoder_reqbufs(struct coda_ctx *ctx, + struct v4l2_requestbuffers *rb) +{ + struct coda_q_data *q_data_src; + int ret; + + if (rb->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) + return 0; + + if (rb->count) { + q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); + ret = coda_alloc_context_buffers(ctx, q_data_src); + if (ret < 0) + return ret; + } else { + coda_free_context_buffers(ctx); + } + + return 0; +} + static int __coda_start_decoding(struct coda_ctx *ctx) { struct coda_q_data *q_data_src, *q_data_dst; @@ -1356,11 +1393,6 @@ static int __coda_start_decoding(struct coda_ctx *ctx) src_fourcc = q_data_src->fourcc; dst_fourcc = q_data_dst->fourcc; - /* Allocate per-instance buffers */ - ret = coda_alloc_context_buffers(ctx, q_data_src); - if (ret < 0) - return ret; - coda_write(dev, ctx->parabuf.paddr, CODA_REG_BIT_PARA_BUF_ADDR); /* Update coda bitstream read and write pointers from kfifo */ @@ -1906,6 +1938,7 @@ static void coda_finish_decode(struct coda_ctx *ctx) const struct coda_context_ops coda_bit_decode_ops = { .queue_init = coda_decoder_queue_init, + .reqbufs = coda_decoder_reqbufs, .start_streaming = coda_start_decoding, .prepare_run = coda_prepare_decode, .finish_run = coda_finish_decode, diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c index 443886535230..a8a6c36a1f00 100644 --- a/drivers/media/platform/coda/coda-common.c +++ b/drivers/media/platform/coda/coda-common.c @@ -696,6 +696,26 @@ static int coda_s_fmt_vid_out(struct file *file, void *priv, return coda_s_fmt(ctx, &f_cap); } +static int coda_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *rb) +{ + struct coda_ctx *ctx = fh_to_ctx(priv); + int ret; + + ret = v4l2_m2m_reqbufs(file, ctx->fh.m2m_ctx, rb); + if (ret) + return ret; + + /* + * Allow to allocate instance specific per-context buffers, such as + * bitstream ringbuffer, slice buffer, work buffer, etc. if needed. + */ + if (rb->type == V4L2_BUF_TYPE_VIDEO_OUTPUT && ctx->ops->reqbufs) + return ctx->ops->reqbufs(ctx, rb); + + return 0; +} + static int coda_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) { @@ -841,7 +861,7 @@ static const struct v4l2_ioctl_ops coda_ioctl_ops = { .vidioc_try_fmt_vid_out = coda_try_fmt_vid_out, .vidioc_s_fmt_vid_out = coda_s_fmt_vid_out, - .vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs, + .vidioc_reqbufs = coda_reqbufs, .vidioc_querybuf = v4l2_m2m_ioctl_querybuf, .vidioc_qbuf = coda_qbuf, diff --git a/drivers/media/platform/coda/coda.h b/drivers/media/platform/coda/coda.h index 499049f3896b..57d070ce6665 100644 --- a/drivers/media/platform/coda/coda.h +++ b/drivers/media/platform/coda/coda.h @@ -178,6 +178,7 @@ struct coda_ctx; struct coda_context_ops { int (*queue_init)(void *priv, struct vb2_queue *src_vq, struct vb2_queue *dst_vq); + int (*reqbufs)(struct coda_ctx *ctx, struct v4l2_requestbuffers *rb); int (*start_streaming)(struct coda_ctx *ctx); int (*prepare_run)(struct coda_ctx *ctx); void (*finish_run)(struct coda_ctx *ctx);