[PATCH v4 05/17] mtk-mdp: Add locks for capture and output vb2_queues

[Ezequiel Garcia]

Use the mutex in struct mtk_mdp_ctx to protect the
capture and output  vb2_queues. This allows to replace
the ad-hoc wait_{prepare, finish} with
vb2_ops_wait_{prepare, finish}.

Signed-off-by: Ezequiel Garcia <ezequ...@collabora.com>
---
 drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c 
b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
index 583d47724ee8..c2e2f5f1ebf1 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
@@ -394,20 +394,6 @@ static bool mtk_mdp_ctx_state_is_set(struct mtk_mdp_ctx 
*ctx, u32 mask)
        return ret;
 }
 
-static void mtk_mdp_ctx_lock(struct vb2_queue *vq)
-{
-       struct mtk_mdp_ctx *ctx = vb2_get_drv_priv(vq);
-
-       mutex_lock(&ctx->mdp_dev->lock);
-}
-
-static void mtk_mdp_ctx_unlock(struct vb2_queue *vq)
-{
-       struct mtk_mdp_ctx *ctx = vb2_get_drv_priv(vq);
-
-       mutex_unlock(&ctx->mdp_dev->lock);
-}
-
 static void mtk_mdp_set_frame_size(struct mtk_mdp_frame *frame, int width,
                                   int height)
 {
@@ -625,10 +611,10 @@ static const struct vb2_ops mtk_mdp_m2m_qops = {
        .queue_setup     = mtk_mdp_m2m_queue_setup,
        .buf_prepare     = mtk_mdp_m2m_buf_prepare,
        .buf_queue       = mtk_mdp_m2m_buf_queue,
-       .wait_prepare    = mtk_mdp_ctx_unlock,
-       .wait_finish     = mtk_mdp_ctx_lock,
        .stop_streaming  = mtk_mdp_m2m_stop_streaming,
        .start_streaming = mtk_mdp_m2m_start_streaming,
+       .wait_prepare    = vb2_ops_wait_prepare,
+       .wait_finish     = vb2_ops_wait_finish,
 };
 
 static int mtk_mdp_m2m_querycap(struct file *file, void *fh,
@@ -996,6 +982,7 @@ static int mtk_mdp_m2m_queue_init(void *priv, struct 
vb2_queue *src_vq,
        src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
        src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
        src_vq->dev = &ctx->mdp_dev->pdev->dev;
+       src_vq->lock = &ctx->mdp_dev->lock;
 
        ret = vb2_queue_init(src_vq);
        if (ret)
@@ -1010,6 +997,7 @@ static int mtk_mdp_m2m_queue_init(void *priv, struct 
vb2_queue *src_vq,
        dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
        dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
        dst_vq->dev = &ctx->mdp_dev->pdev->dev;
+       dst_vq->lock = &ctx->mdp_dev->lock;
 
        return vb2_queue_init(dst_vq);
 }
-- 
2.17.1