linux-kernel - [PATCH v2 4/4] media: mediatek: vcodec: remove parse nal info in kernel

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Message-ID: <20241016034927.8181-5-yunfei.dong@mediatek.com>
Date: Wed, 16 Oct 2024 11:49:23 +0800
From: Yunfei Dong <yunfei.dong@...iatek.com>
To: Nícolas F . R . A . Prado
	<nfraprado@...labora.com>, Sebastian Fricke <sebastian.fricke@...labora.com>,
	Nicolas Dufresne <nicolas.dufresne@...labora.com>, Hans Verkuil
	<hverkuil-cisco@...all.nl>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Benjamin Gaignard
	<benjamin.gaignard@...labora.com>, Nathan Hebert <nhebert@...omium.org>,
	Daniel Almeida <daniel.almeida@...labora.com>
CC: Hsin-Yi Wang <hsinyi@...omium.org>, Chen-Yu Tsai <wenst@...omium.org>,
	Fritz Koenig <frkoenig@...omium.org>, Daniel Vetter <daniel@...ll.ch>, "Steve
 Cho" <stevecho@...omium.org>, Yunfei Dong <yunfei.dong@...iatek.com>,
	<linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v2 4/4] media: mediatek: vcodec: remove parse nal info in kernel

Hardware can parse the slice syntax to get nal information in
scp for extend architecture, needn't to parse it again in
kernel.

Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
---
 .../decoder/vdec/vdec_h264_req_multi_if.c     | 24 +++----------------
 1 file changed, 3 insertions(+), 21 deletions(-)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_multi_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_multi_if.c
index 69ca775bb3f1..c99a64384edf 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_multi_if.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_h264_req_multi_if.c
@@ -802,11 +802,10 @@ static int vdec_h264_slice_lat_decode_ex(void *h_vdec, struct mtk_vcodec_mem *bs
 	struct vdec_h264_slice_inst *inst = h_vdec;
 	struct vdec_vpu_inst *vpu = &inst->vpu;
 	struct mtk_video_dec_buf *src_buf_info;
-	int nal_start_idx, err, timeout = 0;
+	int err, timeout = 0;
 	unsigned int data[2];
 	struct vdec_lat_buf *lat_buf;
 	struct vdec_h264_slice_share_info *share_info;
-	unsigned char *buf;
 
 	if (vdec_msg_queue_init(&inst->ctx->msg_queue, inst->ctx,
 				vdec_h264_slice_core_decode_ex,
@@ -830,14 +829,6 @@ static int vdec_h264_slice_lat_decode_ex(void *h_vdec, struct mtk_vcodec_mem *bs
 	share_info = lat_buf->private_data;
 	src_buf_info = container_of(bs, struct mtk_video_dec_buf, bs_buffer);
 
-	buf = (unsigned char *)bs->va;
-	nal_start_idx = mtk_vdec_h264_find_start_code(buf, bs->size);
-	if (nal_start_idx < 0) {
-		err = -EINVAL;
-		goto err_free_fb_out;
-	}
-
-	inst->vsi->dec.nal_info = buf[nal_start_idx];
 	lat_buf->vb2_v4l2_src = &src_buf_info->m2m_buf.vb;
 	v4l2_m2m_buf_copy_metadata(&src_buf_info->m2m_buf.vb, &lat_buf->ts_info, true);
 
@@ -846,7 +837,7 @@ static int vdec_h264_slice_lat_decode_ex(void *h_vdec, struct mtk_vcodec_mem *bs
 	if (err)
 		goto err_free_fb_out;
 
-	vdec_h264_insert_startcode(inst->ctx->dev, buf, &bs->size,
+	vdec_h264_insert_startcode(inst->ctx->dev, bs->va, &bs->size,
 				   &share_info->h264_slice_params.pps);
 
 	*res_chg = inst->resolution_changed;
@@ -1078,11 +1069,10 @@ static int vdec_h264_slice_single_decode_ex(void *h_vdec, struct mtk_vcodec_mem
 	struct vdec_vpu_inst *vpu = &inst->vpu;
 	struct mtk_video_dec_buf *src_buf_info, *dst_buf_info;
 	struct vdec_fb *fb;
-	unsigned char *buf;
 	unsigned int data[2], i;
 	u64 y_fb_dma, c_fb_dma;
 	struct mtk_vcodec_mem *mem;
-	int err, nal_start_idx;
+	int err;
 
 	/* bs NULL means flush decoder */
 	if (!bs)
@@ -1117,14 +1107,6 @@ static int vdec_h264_slice_single_decode_ex(void *h_vdec, struct mtk_vcodec_mem
 	memcpy(&inst->vsi_ctx_ex.h264_slice_params, &inst->h264_slice_param,
 	       sizeof(inst->vsi_ctx_ex.h264_slice_params));
 
-	buf = (unsigned char *)bs->va;
-	nal_start_idx = mtk_vdec_h264_find_start_code(buf, bs->size);
-	if (nal_start_idx < 0) {
-		err = -EINVAL;
-		goto err_free_fb_out;
-	}
-	inst->vsi_ctx_ex.dec.nal_info = buf[nal_start_idx];
-
 	*res_chg = inst->resolution_changed;
 	if (inst->resolution_changed) {
 		mtk_vdec_debug(inst->ctx, "- resolution changed -");
-- 
2.46.0