From: Pawel Osciak Date: Mon, 19 May 2014 12:32:58 +0000 (-0300) Subject: [media] s5p-mfc: Fixes for decode REQBUFS X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=38beac65a2d1cffe96ae0aee3eef57685d4eff74;p=linux-beck.git [media] s5p-mfc: Fixes for decode REQBUFS - Honor return values from vb2_reqbufs on REQBUFS(0). - Do not set the number of allocated buffers to 0 if userspace tries to request buffers again without freeing them. - There is no need to verify correct instance state on reqbufs, as we will verify this in queue_setup(). - There is also no need to verify that vb2_reqbufs() was able to allocate enough buffers (pb_count) and call buf_init on that many buffers (i.e. dst_buf_count is at least pb_count), because this will be verified by second queue_setup() call as well and vb2_reqbufs() will fail otherwise. - Only verify state is MFCINST_INIT when allocating, not when freeing. - Refactor and simplify code. Signed-off-by: Pawel Osciak Signed-off-by: Arun Kumar K Signed-off-by: Kamil Debski Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c index 58b7bbaa2da0..99a55e65e65e 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c @@ -462,104 +462,124 @@ out: return ret; } -/* Reqeust buffers */ -static int vidioc_reqbufs(struct file *file, void *priv, - struct v4l2_requestbuffers *reqbufs) +static int reqbufs_output(struct s5p_mfc_dev *dev, struct s5p_mfc_ctx *ctx, + struct v4l2_requestbuffers *reqbufs) { - struct s5p_mfc_dev *dev = video_drvdata(file); - struct s5p_mfc_ctx *ctx = fh_to_ctx(priv); int ret = 0; - if (reqbufs->memory != V4L2_MEMORY_MMAP) { - mfc_err("Only V4L2_MEMORY_MAP is supported\n"); - return -EINVAL; - } - if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { - /* Can only request buffers after an instance has been opened.*/ - if (ctx->state == MFCINST_INIT) { - ctx->src_bufs_cnt = 0; - if (reqbufs->count == 0) { - mfc_debug(2, "Freeing buffers\n"); - s5p_mfc_clock_on(); - ret = vb2_reqbufs(&ctx->vq_src, reqbufs); - s5p_mfc_clock_off(); - return ret; - } - /* Decoding */ - if (ctx->output_state != QUEUE_FREE) { - mfc_err("Bufs have already been requested\n"); - return -EINVAL; - } - s5p_mfc_clock_on(); - ret = vb2_reqbufs(&ctx->vq_src, reqbufs); - s5p_mfc_clock_off(); - if (ret) { - mfc_err("vb2_reqbufs on output failed\n"); - return ret; - } - mfc_debug(2, "vb2_reqbufs: %d\n", ret); - ctx->output_state = QUEUE_BUFS_REQUESTED; + s5p_mfc_clock_on(); + + if (reqbufs->count == 0) { + mfc_debug(2, "Freeing buffers\n"); + ret = vb2_reqbufs(&ctx->vq_src, reqbufs); + if (ret) + goto out; + ctx->src_bufs_cnt = 0; + } else if (ctx->output_state == QUEUE_FREE) { + /* Can only request buffers after the instance + * has been opened. + */ + WARN_ON(ctx->src_bufs_cnt != 0); + if (ctx->state != MFCINST_INIT) { + mfc_err("Reqbufs called in an invalid state\n"); + ret = -EINVAL; + goto out; } - } else if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { + + mfc_debug(2, "Allocating %d buffers for OUTPUT queue\n", + reqbufs->count); + ret = vb2_reqbufs(&ctx->vq_src, reqbufs); + if (ret) + goto out; + + ctx->output_state = QUEUE_BUFS_REQUESTED; + } else { + mfc_err("Buffers have already been requested\n"); + ret = -EINVAL; + } +out: + s5p_mfc_clock_off(); + if (ret) + mfc_err("Failed allocating buffers for OUTPUT queue\n"); + return ret; +} + +static int reqbufs_capture(struct s5p_mfc_dev *dev, struct s5p_mfc_ctx *ctx, + struct v4l2_requestbuffers *reqbufs) +{ + int ret = 0; + + s5p_mfc_clock_on(); + + if (reqbufs->count == 0) { + mfc_debug(2, "Freeing buffers\n"); + ret = vb2_reqbufs(&ctx->vq_dst, reqbufs); + if (ret) + goto out; + s5p_mfc_hw_call(dev->mfc_ops, release_codec_buffers, ctx); ctx->dst_bufs_cnt = 0; - if (reqbufs->count == 0) { - mfc_debug(2, "Freeing buffers\n"); - s5p_mfc_clock_on(); - ret = vb2_reqbufs(&ctx->vq_dst, reqbufs); - s5p_mfc_clock_off(); - return ret; - } - if (ctx->capture_state != QUEUE_FREE) { - mfc_err("Bufs have already been requested\n"); - return -EINVAL; - } - ctx->capture_state = QUEUE_BUFS_REQUESTED; - s5p_mfc_clock_on(); + } else if (ctx->capture_state == QUEUE_FREE) { + WARN_ON(ctx->dst_bufs_cnt != 0); + mfc_debug(2, "Allocating %d buffers for CAPTURE queue\n", + reqbufs->count); ret = vb2_reqbufs(&ctx->vq_dst, reqbufs); - s5p_mfc_clock_off(); - if (ret) { - mfc_err("vb2_reqbufs on capture failed\n"); - return ret; - } - if (reqbufs->count < ctx->pb_count) { - mfc_err("Not enough buffers allocated\n"); - reqbufs->count = 0; - s5p_mfc_clock_on(); - ret = vb2_reqbufs(&ctx->vq_dst, reqbufs); - s5p_mfc_clock_off(); - return -ENOMEM; - } + if (ret) + goto out; + + ctx->capture_state = QUEUE_BUFS_REQUESTED; ctx->total_dpb_count = reqbufs->count; + ret = s5p_mfc_hw_call(dev->mfc_ops, alloc_codec_buffers, ctx); if (ret) { mfc_err("Failed to allocate decoding buffers\n"); reqbufs->count = 0; - s5p_mfc_clock_on(); - ret = vb2_reqbufs(&ctx->vq_dst, reqbufs); - s5p_mfc_clock_off(); - return -ENOMEM; - } - if (ctx->dst_bufs_cnt == ctx->total_dpb_count) { - ctx->capture_state = QUEUE_BUFS_MMAPED; - } else { - mfc_err("Not all buffers passed to buf_init\n"); - reqbufs->count = 0; - s5p_mfc_clock_on(); - ret = vb2_reqbufs(&ctx->vq_dst, reqbufs); - s5p_mfc_hw_call(dev->mfc_ops, release_codec_buffers, - ctx); - s5p_mfc_clock_off(); - return -ENOMEM; + vb2_reqbufs(&ctx->vq_dst, reqbufs); + ret = -ENOMEM; + ctx->capture_state = QUEUE_FREE; + goto out; } + + WARN_ON(ctx->dst_bufs_cnt != ctx->total_dpb_count); + ctx->capture_state = QUEUE_BUFS_MMAPED; + if (s5p_mfc_ctx_ready(ctx)) set_work_bit_irqsave(ctx); s5p_mfc_hw_call(dev->mfc_ops, try_run, dev); - s5p_mfc_wait_for_done_ctx(ctx, - S5P_MFC_R2H_CMD_INIT_BUFFERS_RET, 0); + s5p_mfc_wait_for_done_ctx(ctx, S5P_MFC_R2H_CMD_INIT_BUFFERS_RET, + 0); + } else { + mfc_err("Buffers have already been requested\n"); + ret = -EINVAL; } +out: + s5p_mfc_clock_off(); + if (ret) + mfc_err("Failed allocating buffers for CAPTURE queue\n"); return ret; } +/* Reqeust buffers */ +static int vidioc_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *reqbufs) +{ + struct s5p_mfc_dev *dev = video_drvdata(file); + struct s5p_mfc_ctx *ctx = fh_to_ctx(priv); + + if (reqbufs->memory != V4L2_MEMORY_MMAP) { + mfc_err("Only V4L2_MEMORY_MAP is supported\n"); + return -EINVAL; + } + + if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { + return reqbufs_output(dev, ctx, reqbufs); + } else if (reqbufs->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { + return reqbufs_capture(dev, ctx, reqbufs); + } else { + mfc_err("Invalid type requested\n"); + return -EINVAL; + } +} + /* Query buffer */ static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *buf)