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From: Jacopo Mondi <jacopo.mondi+renesas@ideasonboard.com>
Date: Tue, 01 Apr 2025 16:22:01 +0200
Subject: [PATCH v7 1/5] media: vsp1: Add support IIF ISP Interface
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To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
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=?utf-8?q?Niklas_S=C3=B6derlund?= <niklas.soderlund@ragnatech.se>
Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
linux-renesas-soc@vger.kernel.org,
Jacopo Mondi <jacopo.mondi+renesas@ideasonboard.com>,
Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
=?utf-8?q?Niklas_S=C3=B6derlund?= <niklas.soderlund+renesas@ragnatech.se>
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fpr=72392EDC88144A65C701EA9BA5826A2587AD026B
The IIF (ISP InterFace) is a VSP2 function that transfers data
to the ISP by reading from external memory through two RPF
instances.
Add support for it in the vsp1 driver by introducing a new entity
type. The sole required operation is to enable the IIF function
during configure_stream().
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Niklas S=C3=B6derlund <niklas.soderlund+renesas@ragnatech.se>
Tested-by: Niklas S=C3=B6derlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Jacopo Mondi <jacopo.mondi+renesas@ideasonboard.com>
---
v2->v3:
- Replace SRGGB codes with luma-only
- Fix CI loop warning report
- Drop a hunk that was not meant to be there
---
drivers/media/platform/renesas/vsp1/Makefile | 2 +-
drivers/media/platform/renesas/vsp1/vsp1.h | 3 +
drivers/media/platform/renesas/vsp1/vsp1_drv.c | 11 ++
drivers/media/platform/renesas/vsp1/vsp1_entity.c | 8 ++
drivers/media/platform/renesas/vsp1/vsp1_entity.h | 1 +
drivers/media/platform/renesas/vsp1/vsp1_iif.c | 121 ++++++++++++++++++=
++++
drivers/media/platform/renesas/vsp1/vsp1_iif.h | 26 +++++
drivers/media/platform/renesas/vsp1/vsp1_pipe.c | 1 +
drivers/media/platform/renesas/vsp1/vsp1_pipe.h | 1 +
drivers/media/platform/renesas/vsp1/vsp1_regs.h | 8 ++
10 files changed, 181 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/renesas/vsp1/Makefile b/drivers/media/p=
latform/renesas/vsp1/Makefile
index 4bb4dcbef7b5..de8c802e1d1a 100644
--- a/drivers/media/platform/renesas/vsp1/Makefile
+++ b/drivers/media/platform/renesas/vsp1/Makefile
@@ -5,6 +5,6 @@ vsp1-y +=3D vsp1_rpf.o vsp1_rwpf.o vsp1_wpf.o
vsp1-y +=3D vsp1_clu.o vsp1_hsit.o vsp1_lut.o
vsp1-y +=3D vsp1_brx.o vsp1_sru.o vsp1_uds.o
vsp1-y +=3D vsp1_hgo.o vsp1_hgt.o vsp1_histo.o
-vsp1-y +=3D vsp1_lif.o vsp1_uif.o
+vsp1-y +=3D vsp1_iif.o vsp1_lif.o vsp1_uif.o
=20
obj-$(CONFIG_VIDEO_RENESAS_VSP1) +=3D vsp1.o
diff --git a/drivers/media/platform/renesas/vsp1/vsp1.h b/drivers/media/pla=
tform/renesas/vsp1/vsp1.h
index 2f6f0c6ae555..263024639dd2 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1.h
+++ b/drivers/media/platform/renesas/vsp1/vsp1.h
@@ -32,6 +32,7 @@ struct vsp1_clu;
struct vsp1_hgo;
struct vsp1_hgt;
struct vsp1_hsit;
+struct vsp1_iif;
struct vsp1_lif;
struct vsp1_lut;
struct vsp1_rwpf;
@@ -56,6 +57,7 @@ struct vsp1_uif;
#define VSP1_HAS_BRS BIT(9)
#define VSP1_HAS_EXT_DL BIT(10)
#define VSP1_HAS_NON_ZERO_LBA BIT(11)
+#define VSP1_HAS_IIF BIT(12)
=20
struct vsp1_device_info {
u32 version;
@@ -91,6 +93,7 @@ struct vsp1_device {
struct vsp1_hgt *hgt;
struct vsp1_hsit *hsi;
struct vsp1_hsit *hst;
+ struct vsp1_iif *iif;
struct vsp1_lif *lif[VSP1_MAX_LIF];
struct vsp1_lut *lut;
struct vsp1_rwpf *rpf[VSP1_MAX_RPF];
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_drv.c b/drivers/media=
/platform/renesas/vsp1/vsp1_drv.c
index 9fc6bf624a52..d13e9b31aa7c 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_drv.c
+++ b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
@@ -29,6 +29,7 @@
#include "vsp1_hgo.h"
#include "vsp1_hgt.h"
#include "vsp1_hsit.h"
+#include "vsp1_iif.h"
#include "vsp1_lif.h"
#include "vsp1_lut.h"
#include "vsp1_pipe.h"
@@ -340,6 +341,16 @@ static int vsp1_create_entities(struct vsp1_device *vs=
p1)
&vsp1->entities);
}
=20
+ if (vsp1_feature(vsp1, VSP1_HAS_IIF)) {
+ vsp1->iif =3D vsp1_iif_create(vsp1);
+ if (IS_ERR(vsp1->iif)) {
+ ret =3D PTR_ERR(vsp1->iif);
+ goto done;
+ }
+
+ list_add_tail(&vsp1->iif->entity.list_dev, &vsp1->entities);
+ }
+
/*
* The LIFs are only supported when used in conjunction with the DU, in
* which case the userspace API is disabled. If the userspace API is
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_entity.c b/drivers/me=
dia/platform/renesas/vsp1/vsp1_entity.c
index 8b8945bd8f10..2096a09a1278 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_entity.c
+++ b/drivers/media/platform/renesas/vsp1/vsp1_entity.c
@@ -63,9 +63,14 @@ void vsp1_entity_route_setup(struct vsp1_entity *entity,
/*
* The ILV and BRS share the same data path route. The extra BRSSEL bit
* selects between the ILV and BRS.
+ *
+ * The BRU and IIF share the same data path route. The extra IIFSEL bit
+ * selects between the IIF and BRU.
*/
if (source->type =3D=3D VSP1_ENTITY_BRS)
route |=3D VI6_DPR_ROUTE_BRSSEL;
+ else if (source->type =3D=3D VSP1_ENTITY_IIF)
+ route |=3D VI6_DPR_ROUTE_IIFSEL;
vsp1_dl_body_write(dlb, source->route->reg, route);
}
=20
@@ -528,6 +533,9 @@ struct media_pad *vsp1_entity_remote_pad(struct media_p=
ad *pad)
{ VI6_DPR_NODE_WPF(idx) }, VI6_DPR_NODE_WPF(idx) }
=20
static const struct vsp1_route vsp1_routes[] =3D {
+ { VSP1_ENTITY_IIF, 0, VI6_DPR_BRU_ROUTE,
+ { VI6_DPR_NODE_BRU_IN(0), VI6_DPR_NODE_BRU_IN(1),
+ VI6_DPR_NODE_BRU_IN(3) }, VI6_DPR_NODE_WPF(0) },
{ VSP1_ENTITY_BRS, 0, VI6_DPR_ILV_BRS_ROUTE,
{ VI6_DPR_NODE_BRS_IN(0), VI6_DPR_NODE_BRS_IN(1) }, 0 },
{ VSP1_ENTITY_BRU, 0, VI6_DPR_BRU_ROUTE,
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_entity.h b/drivers/me=
dia/platform/renesas/vsp1/vsp1_entity.h
index 1bcc9e27dfdc..bdcb780a79da 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_entity.h
+++ b/drivers/media/platform/renesas/vsp1/vsp1_entity.h
@@ -28,6 +28,7 @@ enum vsp1_entity_type {
VSP1_ENTITY_HGT,
VSP1_ENTITY_HSI,
VSP1_ENTITY_HST,
+ VSP1_ENTITY_IIF,
VSP1_ENTITY_LIF,
VSP1_ENTITY_LUT,
VSP1_ENTITY_RPF,
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_iif.c b/drivers/media=
/platform/renesas/vsp1/vsp1_iif.c
new file mode 100644
index 000000000000..5dd62bebbe8c
--- /dev/null
+++ b/drivers/media/platform/renesas/vsp1/vsp1_iif.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * vsp1_iif.c -- R-Car VSP1 IIF (ISP Interface)
+ *
+ * Copyright (C) 2025 Ideas On Board Oy
+ * Copyright (C) 2025 Renesas Corporation
+ */
+
+#include "vsp1.h"
+#include "vsp1_dl.h"
+#include "vsp1_iif.h"
+
+#define IIF_MIN_WIDTH 128U
+#define IIF_MIN_HEIGHT 32U
+#define IIF_MAX_WIDTH 5120U
+#define IIF_MAX_HEIGHT 4096U
+
+/* -----------------------------------------------------------------------=
------
+ * Device Access
+ */
+
+static inline void vsp1_iif_write(struct vsp1_dl_body *dlb, u32 reg, u32 d=
ata)
+{
+ vsp1_dl_body_write(dlb, reg, data);
+}
+
+/* -----------------------------------------------------------------------=
------
+ * V4L2 Subdevice Operations
+ */
+
+static const unsigned int iif_codes[] =3D {
+ MEDIA_BUS_FMT_Y8_1X8,
+ MEDIA_BUS_FMT_Y10_1X10,
+ MEDIA_BUS_FMT_Y12_1X12,
+ MEDIA_BUS_FMT_Y16_1X16,
+ MEDIA_BUS_FMT_METADATA_FIXED
+};
+
+static int iif_enum_mbus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ return vsp1_subdev_enum_mbus_code(subdev, sd_state, code, iif_codes,
+ ARRAY_SIZE(iif_codes));
+}
+
+static int iif_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ return vsp1_subdev_enum_frame_size(subdev, sd_state, fse,
+ IIF_MIN_WIDTH, IIF_MIN_HEIGHT,
+ IIF_MAX_WIDTH, IIF_MAX_HEIGHT);
+}
+
+static int iif_set_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_state *sd_state,
+ struct v4l2_subdev_format *fmt)
+{
+ return vsp1_subdev_set_pad_format(subdev, sd_state, fmt, iif_codes,
+ ARRAY_SIZE(iif_codes),
+ IIF_MIN_WIDTH, IIF_MIN_HEIGHT,
+ IIF_MAX_WIDTH, IIF_MAX_HEIGHT);
+}
+
+static const struct v4l2_subdev_pad_ops iif_pad_ops =3D {
+ .enum_mbus_code =3D iif_enum_mbus_code,
+ .enum_frame_size =3D iif_enum_frame_size,
+ .get_fmt =3D vsp1_subdev_get_pad_format,
+ .set_fmt =3D iif_set_format,
+};
+
+static const struct v4l2_subdev_ops iif_ops =3D {
+ .pad =3D &iif_pad_ops,
+};
+
+/* -----------------------------------------------------------------------=
------
+ * VSP1 Entity Operations
+ */
+
+static void iif_configure_stream(struct vsp1_entity *entity,
+ struct v4l2_subdev_state *state,
+ struct vsp1_pipeline *pipe,
+ struct vsp1_dl_list *dl,
+ struct vsp1_dl_body *dlb)
+{
+ vsp1_iif_write(dlb, VI6_IIF_CTRL, VI6_IIF_CTRL_CTRL);
+}
+
+static const struct vsp1_entity_operations iif_entity_ops =3D {
+ .configure_stream =3D iif_configure_stream,
+};
+
+/* -----------------------------------------------------------------------=
------
+ * Initialization and Cleanup
+ */
+
+struct vsp1_iif *vsp1_iif_create(struct vsp1_device *vsp1)
+{
+ struct vsp1_iif *iif;
+ int ret;
+
+ iif =3D devm_kzalloc(vsp1->dev, sizeof(*iif), GFP_KERNEL);
+ if (!iif)
+ return ERR_PTR(-ENOMEM);
+
+ iif->entity.ops =3D &iif_entity_ops;
+ iif->entity.type =3D VSP1_ENTITY_IIF;
+
+ /*
+ * The IIF is never exposed to userspace, but media entity registration
+ * requires a function to be set. Use PROC_VIDEO_PIXEL_FORMATTER just to
+ * avoid triggering a WARN_ON(), the value won't be seen anywhere.
+ */
+ ret =3D vsp1_entity_init(vsp1, &iif->entity, "iif", 3, &iif_ops,
+ MEDIA_ENT_F_PROC_VIDEO_PIXEL_FORMATTER);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ return iif;
+}
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_iif.h b/drivers/media=
/platform/renesas/vsp1/vsp1_iif.h
new file mode 100644
index 000000000000..165996a822c1
--- /dev/null
+++ b/drivers/media/platform/renesas/vsp1/vsp1_iif.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * vsp1_iif.h -- R-Car VSP1 IIF (ISP Interface)
+ *
+ * Copyright (C) 2025 Ideas On Board Oy
+ * Copyright (C) 2025 Renesas Corporation
+ */
+#ifndef __VSP1_IIF_H__
+#define __VSP1_IIF_H__
+
+#include <media/v4l2-subdev.h>
+
+#include "vsp1_entity.h"
+
+struct vsp1_iif {
+ struct vsp1_entity entity;
+};
+
+static inline struct vsp1_iif *to_iif(struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct vsp1_iif, entity.subdev);
+}
+
+struct vsp1_iif *vsp1_iif_create(struct vsp1_device *vsp1);
+
+#endif /* __VSP1_IIF_H__ */
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_pipe.c b/drivers/medi=
a/platform/renesas/vsp1/vsp1_pipe.c
index bb0739f684f3..8e9be3ec1b4d 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_pipe.c
+++ b/drivers/media/platform/renesas/vsp1/vsp1_pipe.c
@@ -286,6 +286,7 @@ void vsp1_pipeline_reset(struct vsp1_pipeline *pipe)
pipe->brx =3D NULL;
pipe->hgo =3D NULL;
pipe->hgt =3D NULL;
+ pipe->iif =3D NULL;
pipe->lif =3D NULL;
pipe->uds =3D NULL;
}
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_pipe.h b/drivers/medi=
a/platform/renesas/vsp1/vsp1_pipe.h
index 1ba7bdbad5a8..1655a820da10 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_pipe.h
+++ b/drivers/media/platform/renesas/vsp1/vsp1_pipe.h
@@ -119,6 +119,7 @@ struct vsp1_pipeline {
struct vsp1_entity *brx;
struct vsp1_entity *hgo;
struct vsp1_entity *hgt;
+ struct vsp1_entity *iif;
struct vsp1_entity *lif;
struct vsp1_entity *uds;
struct vsp1_entity *uds_input;
diff --git a/drivers/media/platform/renesas/vsp1/vsp1_regs.h b/drivers/medi=
a/platform/renesas/vsp1/vsp1_regs.h
index 7eca82e0ba7e..86e47c2d991f 100644
--- a/drivers/media/platform/renesas/vsp1/vsp1_regs.h
+++ b/drivers/media/platform/renesas/vsp1/vsp1_regs.h
@@ -252,6 +252,13 @@
#define VI6_RPF_BRDITH_CTRL_ODE BIT(8)
#define VI6_RPF_BRDITH_CTRL_CBRM BIT(0)
=20
+/* -----------------------------------------------------------------------=
------
+ * IIF Control Registers
+ */
+
+#define VI6_IIF_CTRL 0x0608
+#define VI6_IIF_CTRL_CTRL 0x13
+
/* -----------------------------------------------------------------------=
------
* WPF Control Registers
*/
@@ -388,6 +395,7 @@
#define VI6_DPR_HST_ROUTE 0x2044
#define VI6_DPR_HSI_ROUTE 0x2048
#define VI6_DPR_BRU_ROUTE 0x204c
+#define VI6_DPR_ROUTE_IIFSEL BIT(28)
#define VI6_DPR_ILV_BRS_ROUTE 0x2050
#define VI6_DPR_ROUTE_BRSSEL BIT(28)
#define VI6_DPR_ROUTE_FXA_MASK (0xff << 16)
--=20
2.48.1