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Message-ID: <27263bbf-10d0-174d-38b4-5d6b0a6bc9bd@xs4all.nl>
Date: Wed, 24 Aug 2022 15:02:32 +0200
From: Hans Verkuil <hverkuil-cisco@...all.nl>
To: Mingjia Zhang <mingjia.zhang@...iatek.com>,
Yunfei Dong <yunfei.dong@...iatek.com>,
Alexandre Courbot <acourbot@...omium.org>,
Nicolas Dufresne <nicolas@...fresne.ca>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Benjamin Gaignard <benjamin.gaignard@...labora.com>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Tomasz Figa <tfiga@...gle.com>
Cc: Irui Wang <irui.wang@...iatek.com>,
George Sun <george.sun@...iatek.com>,
Steve Cho <stevecho@...omium.org>, devicetree@...r.kernel.org,
Project_Global_Chrome_Upstream_Group@...iatek.com,
linux-kernel@...r.kernel.org,
dri-devel <dri-devel@...ts.freedesktop.org>,
Xiaoyong Lu <xiaoyong.lu@...iatek.com>,
linux-mediatek@...ts.infradead.org,
Hsin-Yi Wang <hsinyi@...omium.org>,
Fritz Koenig <frkoenig@...omium.org>,
linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [PATCH, v2] media: mediatek: vcodec: Add to support VP9 inner
racing mode
Hi Mingjia,
On 27/07/2022 08:13, Mingjia Zhang wrote:
> In order to reduce decoder latency, enable VP9 inner racing mode.
> Send lat trans buffer information to core when trigger lat to work,
> need not to wait until lat decode done.
>
> Signed-off-by: mingjia zhang <mingjia.zhang@...iatek.com>
I'm getting this compile warning:
drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c: In function 'vdec_vp9_slice_core_decode':
drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c:2218:50: warning: 'instance' may be used uninitialized in this function [-Wmaybe-uninitialized]
2218 | if (IS_VDEC_INNER_RACING(instance->ctx->dev->dec_capability))
| ^~
I think you need to take a close look at the error handling in vdec_vp9_slice_core_decode().
After each error there is a 'goto err;' and that will run the new code, and that doesn't
feel right.
Regards,
Hans
> ---
> 1. CTS/GTS test pass
> 2. Fluster result: Ran 240/303 tests successfully
> ---
> .../vcodec/vdec/vdec_vp9_req_lat_if.c | 64 ++++++++++++-------
> 1 file changed, 40 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c
> index fb1c36a3592d..92b47f0fdf40 100644
> --- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c
> +++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c
> @@ -436,6 +436,7 @@ struct vdec_vp9_slice_ref {
> * @frame_ctx: 4 frame context according to VP9 Spec
> * @frame_ctx_helper: 4 frame context according to newest kernel spec
> * @dirty: state of each frame context
> + * @local_vsi: local instance vsi information
> * @init_vsi: vsi used for initialized VP9 instance
> * @vsi: vsi used for decoding/flush ...
> * @core_vsi: vsi used for Core stage
> @@ -482,6 +483,8 @@ struct vdec_vp9_slice_instance {
> struct v4l2_vp9_frame_context frame_ctx_helper;
> unsigned char dirty[4];
>
> + struct vdec_vp9_slice_vsi local_vsi;
> +
> /* MicroP vsi */
> union {
> struct vdec_vp9_slice_init_vsi *init_vsi;
> @@ -1616,16 +1619,10 @@ static int vdec_vp9_slice_update_single(struct vdec_vp9_slice_instance *instance
> }
>
> static int vdec_vp9_slice_update_lat(struct vdec_vp9_slice_instance *instance,
> - struct vdec_lat_buf *lat_buf,
> - struct vdec_vp9_slice_pfc *pfc)
> + struct vdec_vp9_slice_vsi *vsi)
> {
> - struct vdec_vp9_slice_vsi *vsi;
> -
> - vsi = &pfc->vsi;
> - memcpy(&pfc->state[0], &vsi->state, sizeof(vsi->state));
> -
> mtk_vcodec_debug(instance, "Frame %u LAT CRC 0x%08x %lx %lx\n",
> - pfc->seq, vsi->state.crc[0],
> + (instance->seq - 1), vsi->state.crc[0],
> (unsigned long)vsi->trans.dma_addr,
> (unsigned long)vsi->trans.dma_addr_end);
>
> @@ -2090,6 +2087,13 @@ static int vdec_vp9_slice_lat_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
> return ret;
> }
>
> + if (IS_VDEC_INNER_RACING(instance->ctx->dev->dec_capability)) {
> + vdec_vp9_slice_vsi_from_remote(vsi, instance->vsi, 0);
> + memcpy(&instance->local_vsi, vsi, sizeof(*vsi));
> + vdec_msg_queue_qbuf(&ctx->dev->msg_queue_core_ctx, lat_buf);
> + vsi = &instance->local_vsi;
> + }
> +
> if (instance->irq) {
> ret = mtk_vcodec_wait_for_done_ctx(ctx, MTK_INST_IRQ_RECEIVED,
> WAIT_INTR_TIMEOUT_MS, MTK_VDEC_LAT0);
> @@ -2102,22 +2106,25 @@ static int vdec_vp9_slice_lat_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
> }
>
> vdec_vp9_slice_vsi_from_remote(vsi, instance->vsi, 0);
> - ret = vdec_vp9_slice_update_lat(instance, lat_buf, pfc);
> + ret = vdec_vp9_slice_update_lat(instance, vsi);
>
> - /* LAT trans full, no more UBE or decode timeout */
> - if (ret) {
> - mtk_vcodec_err(instance, "VP9 decode error: %d\n", ret);
> - return ret;
> - }
> + if (!IS_VDEC_INNER_RACING(instance->ctx->dev->dec_capability))
> + /* LAT trans full, no more UBE or decode timeout */
> + if (ret) {
> + mtk_vcodec_err(instance, "frame[%d] decode error: %d\n",
> + ret, (instance->seq - 1));
> + return ret;
> + }
>
> - mtk_vcodec_debug(instance, "lat dma addr: 0x%lx 0x%lx\n",
> - (unsigned long)pfc->vsi.trans.dma_addr,
> - (unsigned long)pfc->vsi.trans.dma_addr_end);
>
> - vdec_msg_queue_update_ube_wptr(&ctx->msg_queue,
> - vsi->trans.dma_addr_end +
> - ctx->msg_queue.wdma_addr.dma_addr);
> - vdec_msg_queue_qbuf(&ctx->dev->msg_queue_core_ctx, lat_buf);
> + vsi->trans.dma_addr_end += ctx->msg_queue.wdma_addr.dma_addr;
> + vdec_msg_queue_update_ube_wptr(&ctx->msg_queue, vsi->trans.dma_addr_end);
> + if (!IS_VDEC_INNER_RACING(instance->ctx->dev->dec_capability))
> + vdec_msg_queue_qbuf(&ctx->dev->msg_queue_core_ctx, lat_buf);
> +
> + mtk_vcodec_debug(instance, "lat trans end addr(0x%lx), ube start addr(0x%lx)\n",
> + (unsigned long)vsi->trans.dma_addr_end,
> + (unsigned long)ctx->msg_queue.wdma_addr.dma_addr);
>
> return 0;
> }
> @@ -2193,10 +2200,14 @@ static int vdec_vp9_slice_core_decode(struct vdec_lat_buf *lat_buf)
> goto err;
> }
>
> - pfc->vsi.trans.dma_addr_end += ctx->msg_queue.wdma_addr.dma_addr;
> mtk_vcodec_debug(instance, "core dma_addr_end 0x%lx\n",
> (unsigned long)pfc->vsi.trans.dma_addr_end);
> - vdec_msg_queue_update_ube_rptr(&ctx->msg_queue, pfc->vsi.trans.dma_addr_end);
> +
> + if (IS_VDEC_INNER_RACING(instance->ctx->dev->dec_capability))
> + vdec_msg_queue_update_ube_rptr(&ctx->msg_queue, pfc->vsi.trans.dma_addr);
> + else
> + vdec_msg_queue_update_ube_rptr(&ctx->msg_queue, pfc->vsi.trans.dma_addr_end);
> +
> ctx->dev->vdec_pdata->cap_to_disp(ctx, 0, lat_buf->src_buf_req);
>
> return 0;
> @@ -2204,7 +2215,12 @@ static int vdec_vp9_slice_core_decode(struct vdec_lat_buf *lat_buf)
> err:
> if (ctx && pfc) {
> /* always update read pointer */
> - vdec_msg_queue_update_ube_rptr(&ctx->msg_queue, pfc->vsi.trans.dma_addr_end);
> + if (IS_VDEC_INNER_RACING(instance->ctx->dev->dec_capability))
> + vdec_msg_queue_update_ube_rptr(&ctx->msg_queue,
> + pfc->vsi.trans.dma_addr);
> + else
> + vdec_msg_queue_update_ube_rptr(&ctx->msg_queue,
> + pfc->vsi.trans.dma_addr_end);
>
> if (fb)
> ctx->dev->vdec_pdata->cap_to_disp(ctx, 1, lat_buf->src_buf_req);
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