media: iris: implement reqbuf ioctl with vb2_queue_setup

Implement the reqbuf IOCTL op and the vb2_queue_setup vb2 op in the
driver with necessary hooks.

Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Tested-by: Stefan Schmidt <stefan.schmidt@linaro.org> # x1e80100 (Dell XPS 13 9345)
Reviewed-by: Stefan Schmidt <stefan.schmidt@linaro.org>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-HDK
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

1 files changed, 50 insertions, 0 deletions

diff --git a/drivers/media/platform/qcom/iris/iris_vb2.c b/drivers/media/platform/qcom/iris/iris_vb2.c
new file mode 100644
index 000000000000..e9db44515d91
--- /dev/null
+++ b/drivers/media/platform/qcom/iris/iris_vb2.c
@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include "iris_instance.h"
+#include "iris_vb2.h"
+
+int iris_vb2_queue_setup(struct vb2_queue *q,
+			 unsigned int *num_buffers, unsigned int *num_planes,
+			 unsigned int sizes[], struct device *alloc_devs[])
+{
+	struct iris_inst *inst;
+	struct iris_core *core;
+	struct v4l2_format *f;
+	int ret = 0;
+
+	inst = vb2_get_drv_priv(q);
+
+	mutex_lock(&inst->lock);
+
+	core = inst->core;
+	f = V4L2_TYPE_IS_OUTPUT(q->type) ? inst->fmt_src : inst->fmt_dst;
+
+	if (*num_planes) {
+		if (*num_planes != f->fmt.pix_mp.num_planes ||
+		    sizes[0] < f->fmt.pix_mp.plane_fmt[0].sizeimage)
+			ret = -EINVAL;
+		goto unlock;
+	}
+
+	if (!inst->once_per_session_set) {
+		inst->once_per_session_set = true;
+
+		ret = core->hfi_ops->session_open(inst);
+		if (ret) {
+			ret = -EINVAL;
+			dev_err(core->dev, "session open failed\n");
+			goto unlock;
+		}
+	}
+
+	*num_planes = 1;
+	sizes[0] = f->fmt.pix_mp.plane_fmt[0].sizeimage;
+
+unlock:
+	mutex_unlock(&inst->lock);
+
+	return ret;
+}