[PATCH v13 08/12] media: mediatek: jpeg: fix remove buffer removal timing for multi-core

Kyrie Wu
2026-03-19T02:22:21Z

Move calls to v4l2_m2m_src/dst_buf_remove() inside of the spinlock
protected scope to ensure all necessary operations are performed
before buffers are removed from their queues and ensure proper
synchronization of buffer handling to avoid buffer lost.

Fixes: 86379bd9d399 ("media: mtk-jpeg: Fixes jpeg enc&dec worker sw flow")
Signed-off-by: Kyrie Wu <kyrie.wu@mediatek.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
index efcbad953be1..e67df5eb711b 100644
--- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
+++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c
@@ -1651,9 +1651,6 @@ static void mtk_jpegenc_worker(struct work_struct *work)
goto enc_end;
}

- v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
- v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
-
schedule_delayed_work(&comp_jpeg[hw_id]->job_timeout_work,
msecs_to_jiffies(MTK_JPEG_HW_TIMEOUT_MSEC));

@@ -1671,6 +1668,8 @@ static void mtk_jpegenc_worker(struct work_struct *work)
&src_buf->vb2_buf);
mtk_jpeg_set_enc_params(ctx, comp_jpeg[hw_id]->reg_base);
mtk_jpeg_enc_start(comp_jpeg[hw_id]->reg_base);
+ v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
spin_unlock_irqrestore(&comp_jpeg[hw_id]->hw_lock, flags);

@@ -1752,9 +1751,6 @@ static void mtk_jpegdec_worker(struct work_struct *work)
goto dec_end;
}

- v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
- v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
-
mtk_jpeg_set_dec_src(ctx, &src_buf->vb2_buf, &bs);
if (mtk_jpeg_set_dec_dst(ctx,
&jpeg_src_buf->dec_param,
@@ -1779,6 +1775,8 @@ static void mtk_jpegdec_worker(struct work_struct *work)
jpeg_src_buf->bs_size,
&bs,
&fb);
+ v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
+ v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
mtk_jpeg_dec_start(comp_jpeg[hw_id]->reg_base);
v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
spin_unlock_irqrestore(&comp_jpeg[hw_id]->hw_lock, flags);
--
2.45.2