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From:   Benjamin Gaignard <benjamin.gaignard@collabora.com>
To:     mchehab@kernel.org, tfiga@chromium.org, m.szyprowski@samsung.com,
        ming.qian@nxp.com, ezequiel@vanguardiasur.com.ar,
        p.zabel@pengutronix.de, gregkh@linuxfoundation.org,
        hverkuil-cisco@xs4all.nl, nicolas.dufresne@collabora.com
Cc:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org,
        linux-rockchip@lists.infradead.org, linux-staging@lists.linux.dev,
        kernel@collabora.com,
        Benjamin Gaignard <benjamin.gaignard@collabora.com>,
        "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Subject: [PATCH v11 30/56] media: ti: Use queue min_buffers_needed field to set the min number of buffers
Date:   Thu, 12 Oct 2023 13:46:16 +0200
Message-Id: <20231012114642.19040-31-benjamin.gaignard@collabora.com>
In-Reply-To: <20231012114642.19040-1-benjamin.gaignard@collabora.com>
References: <20231012114642.19040-1-benjamin.gaignard@collabora.com>
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When queue min_buffers_needed field is correctly set vb2 queue_setup()
does take care of it and we can remove the checks from drivers.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
CC: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
---
 drivers/media/platform/ti/am437x/am437x-vpfe.c   | 7 ++-----
 drivers/media/platform/ti/cal/cal-video.c        | 5 +----
 drivers/media/platform/ti/davinci/vpif_capture.c | 5 +----
 drivers/media/platform/ti/davinci/vpif_display.c | 5 +----
 drivers/media/platform/ti/omap/omap_vout.c       | 5 +++--
 5 files changed, 8 insertions(+), 19 deletions(-)

diff --git a/drivers/media/platform/ti/am437x/am437x-vpfe.c b/drivers/media/platform/ti/am437x/am437x-vpfe.c
index 5fa2ea9025d9..80a74ee59bb9 100644
--- a/drivers/media/platform/ti/am437x/am437x-vpfe.c
+++ b/drivers/media/platform/ti/am437x/am437x-vpfe.c
@@ -1772,9 +1772,6 @@ static int vpfe_queue_setup(struct vb2_queue *vq,
 	struct vpfe_device *vpfe = vb2_get_drv_priv(vq);
 	unsigned size = vpfe->fmt.fmt.pix.sizeimage;
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
-
 	if (*nplanes) {
 		if (sizes[0] < size)
 			return -EINVAL;
@@ -1785,7 +1782,7 @@ static int vpfe_queue_setup(struct vb2_queue *vq,
 	sizes[0] = size;
 
 	vpfe_dbg(1, vpfe,
-		"nbuffers=%d, size=%u\n", *nbuffers, sizes[0]);
+		"nbuffers=%u, size=%u\n", vb2_get_num_buffers(vq), sizes[0]);
 
 	/* Calculate field offset */
 	vpfe_calculate_offsets(vpfe);
@@ -2233,7 +2230,7 @@ static int vpfe_probe_complete(struct vpfe_device *vpfe)
 	q->buf_struct_size = sizeof(struct vpfe_cap_buffer);
 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 	q->lock = &vpfe->lock;
-	q->min_buffers_needed = 1;
+	q->min_buffers_needed = 3;
 	q->dev = vpfe->pdev;
 
 	err = vb2_queue_init(q);
diff --git a/drivers/media/platform/ti/cal/cal-video.c b/drivers/media/platform/ti/cal/cal-video.c
index a8abcd0fee17..924465b37e5f 100644
--- a/drivers/media/platform/ti/cal/cal-video.c
+++ b/drivers/media/platform/ti/cal/cal-video.c
@@ -604,9 +604,6 @@ static int cal_queue_setup(struct vb2_queue *vq,
 	struct cal_ctx *ctx = vb2_get_drv_priv(vq);
 	unsigned int size = ctx->v_fmt.fmt.pix.sizeimage;
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
-
 	if (*nplanes) {
 		if (sizes[0] < size)
 			return -EINVAL;
@@ -616,7 +613,7 @@ static int cal_queue_setup(struct vb2_queue *vq,
 	*nplanes = 1;
 	sizes[0] = size;
 
-	ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", *nbuffers, sizes[0]);
+	ctx_dbg(3, ctx, "nbuffers=%d, size=%d\n", vb2_get_num_buffers(vq), sizes[0]);
 
 	return 0;
 }
diff --git a/drivers/media/platform/ti/davinci/vpif_capture.c b/drivers/media/platform/ti/davinci/vpif_capture.c
index 99fae8830c41..8a4cc62cf562 100644
--- a/drivers/media/platform/ti/davinci/vpif_capture.c
+++ b/drivers/media/platform/ti/davinci/vpif_capture.c
@@ -122,9 +122,6 @@ static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 		size = sizes[0];
 	}
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
-
 	*nplanes = 1;
 	sizes[0] = size;
 
@@ -1428,7 +1425,7 @@ static int vpif_probe_complete(void)
 		q->mem_ops = &vb2_dma_contig_memops;
 		q->buf_struct_size = sizeof(struct vpif_cap_buffer);
 		q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-		q->min_buffers_needed = 1;
+		q->min_buffers_needed = 3;
 		q->lock = &common->lock;
 		q->dev = vpif_dev;
 
diff --git a/drivers/media/platform/ti/davinci/vpif_display.c b/drivers/media/platform/ti/davinci/vpif_display.c
index f8ec2991c667..6fc32314cf9c 100644
--- a/drivers/media/platform/ti/davinci/vpif_display.c
+++ b/drivers/media/platform/ti/davinci/vpif_display.c
@@ -122,9 +122,6 @@ static int vpif_buffer_queue_setup(struct vb2_queue *vq,
 		size = sizes[0];
 	}
 
-	if (vq->num_buffers + *nbuffers < 3)
-		*nbuffers = 3 - vq->num_buffers;
-
 	*nplanes = 1;
 	sizes[0] = size;
 
@@ -1168,7 +1165,7 @@ static int vpif_probe_complete(void)
 		q->mem_ops = &vb2_dma_contig_memops;
 		q->buf_struct_size = sizeof(struct vpif_disp_buffer);
 		q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-		q->min_buffers_needed = 1;
+		q->min_buffers_needed = 3;
 		q->lock = &common->lock;
 		q->dev = vpif_dev;
 		err = vb2_queue_init(q);
diff --git a/drivers/media/platform/ti/omap/omap_vout.c b/drivers/media/platform/ti/omap/omap_vout.c
index 4143274089c3..72ce903717d3 100644
--- a/drivers/media/platform/ti/omap/omap_vout.c
+++ b/drivers/media/platform/ti/omap/omap_vout.c
@@ -944,10 +944,11 @@ static int omap_vout_vb2_queue_setup(struct vb2_queue *vq,
 				     struct device *alloc_devs[])
 {
 	struct omap_vout_device *vout = vb2_get_drv_priv(vq);
+	unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 	int size = vout->pix.sizeimage;
 
-	if (is_rotation_enabled(vout) && vq->num_buffers + *nbufs > VRFB_NUM_BUFS) {
-		*nbufs = VRFB_NUM_BUFS - vq->num_buffers;
+	if (is_rotation_enabled(vout) && q_num_bufs + *nbufs > VRFB_NUM_BUFS) {
+		*nbufs = VRFB_NUM_BUFS - q_num_bufs;
 		if (*nbufs == 0)
 			return -EINVAL;
 	}
-- 
2.39.2