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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>,
        Neil Armstrong <neil.armstrong@linaro.org>
Subject: [PATCH v13 32/56] media: meson: vdec: Stop direct calls to queue num_buffers field
Date:   Thu, 19 Oct 2023 14:51:58 +0200
Message-Id: <20231019125222.21370-33-benjamin.gaignard@collabora.com>
In-Reply-To: <20231019125222.21370-1-benjamin.gaignard@collabora.com>
References: <20231019125222.21370-1-benjamin.gaignard@collabora.com>
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Use vb2_get_num_buffers() to avoid using queue num_buffers field directly.
This allows us to change how the number of buffers is computed in the
future.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
CC: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/staging/media/meson/vdec/vdec.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/media/meson/vdec/vdec.c b/drivers/staging/media/meson/vdec/vdec.c
index 219185aaa588..1e2369f104c8 100644
--- a/drivers/staging/media/meson/vdec/vdec.c
+++ b/drivers/staging/media/meson/vdec/vdec.c
@@ -167,22 +167,23 @@ static void process_num_buffers(struct vb2_queue *q,
 				bool is_reqbufs)
 {
 	const struct amvdec_format *fmt_out = sess->fmt_out;
-	unsigned int buffers_total = q->num_buffers + *num_buffers;
+	unsigned int q_num_bufs = vb2_get_num_buffers(q);
+	unsigned int buffers_total = q_num_bufs + *num_buffers;
 	u32 min_buf_capture = v4l2_ctrl_g_ctrl(sess->ctrl_min_buf_capture);
 
-	if (q->num_buffers + *num_buffers < min_buf_capture)
-		*num_buffers = min_buf_capture - q->num_buffers;
+	if (q_num_bufs + *num_buffers < min_buf_capture)
+		*num_buffers = min_buf_capture - q_num_bufs;
 	if (is_reqbufs && buffers_total < fmt_out->min_buffers)
-		*num_buffers = fmt_out->min_buffers - q->num_buffers;
+		*num_buffers = fmt_out->min_buffers - q_num_bufs;
 	if (buffers_total > fmt_out->max_buffers)
-		*num_buffers = fmt_out->max_buffers - q->num_buffers;
+		*num_buffers = fmt_out->max_buffers - q_num_bufs;
 
 	/* We need to program the complete CAPTURE buffer list
 	 * in registers during start_streaming, and the firmwares
 	 * are free to choose any of them to write frames to. As such,
 	 * we need all of them to be queued into the driver
 	 */
-	sess->num_dst_bufs = q->num_buffers + *num_buffers;
+	sess->num_dst_bufs = q_num_bufs + *num_buffers;
 	q->min_buffers_needed = max(fmt_out->min_buffers, sess->num_dst_bufs);
 }
 
-- 
2.39.2