linux-kernel - [PATCH 08/16] media: rockchip: rga: remove size from rga

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Message-Id: <20251007-spu-rga3-v1-8-36ad85570402@pengutronix.de>
Date: Tue, 07 Oct 2025 10:32:01 +0200
From: Sven Püschel <s.pueschel@...gutronix.de>
To: Jacob Chen <jacob-chen@...wrt.com>, 
 Ezequiel Garcia <ezequiel@...guardiasur.com.ar>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, kernel@...gutronix.de, 
 Sven Püschel <s.pueschel@...gutronix.de>
Subject: [PATCH 08/16] media: rockchip: rga: remove size from rga_frame

The size member is only used for the mmu page table mapping.
Therefore avoid storing the value and instead only calculate it
in place. This also avoids the calculation entirely when an external
iommu is used.

Signed-off-by: Sven Püschel <s.pueschel@...gutronix.de>
---
 drivers/media/platform/rockchip/rga/rga-buf.c | 6 +++++-
 drivers/media/platform/rockchip/rga/rga.c     | 8 ++------
 drivers/media/platform/rockchip/rga/rga.h     | 1 -
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/rockchip/rga/rga-buf.c b/drivers/media/platform/rockchip/rga/rga-buf.c
index 26b66b0c7e008308c24433f061a738a3985484b6..e44fe870fb9e34aa93404b7a60022fe441adf8f9 100644
--- a/drivers/media/platform/rockchip/rga/rga-buf.c
+++ b/drivers/media/platform/rockchip/rga/rga-buf.c
@@ -79,9 +79,13 @@ static int rga_buf_init(struct vb2_buffer *vb)
 	struct rockchip_rga *rga = ctx->rga;
 	struct rga_frame *f = rga_get_frame(ctx, vb->vb2_queue->type);
 	size_t n_desc = 0;
+	u32 size = 0;
+	u8 i;
 
 	if (rga_has_internal_iommu(rga)) {
-		n_desc = DIV_ROUND_UP(f->size, PAGE_SIZE);
+		for (i = 0; i < f->pix.num_planes; i++)
+			size += f->pix.plane_fmt[i].sizeimage;
+		n_desc = DIV_ROUND_UP(size, PAGE_SIZE);
 
 		rbuf->n_desc = n_desc;
 		rbuf->dma_desc = dma_alloc_coherent(rga->dev,
diff --git a/drivers/media/platform/rockchip/rga/rga.c b/drivers/media/platform/rockchip/rga/rga.c
index b8e4be3f9acd8a73a3d4e947aeeef9095543fb49..c5f25869d0cd08a794330954ec414f0428b647d8 100644
--- a/drivers/media/platform/rockchip/rga/rga.c
+++ b/drivers/media/platform/rockchip/rga/rga.c
@@ -222,7 +222,6 @@ static int rga_open(struct file *file)
 	};
 
 	def_frame.stride = (def_frame.width * def_frame.fmt->depth) >> 3;
-	def_frame.size = def_frame.stride * def_frame.height;
 
 	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)
@@ -407,9 +406,6 @@ static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		return PTR_ERR(frm);
 	frm->width = pix_fmt->width;
 	frm->height = pix_fmt->height;
-	frm->size = 0;
-	for (i = 0; i < pix_fmt->num_planes; i++)
-		frm->size += pix_fmt->plane_fmt[i].sizeimage;
 	frm->fmt = rga_fmt_find(rga, pix_fmt->pixelformat);
 	frm->stride = pix_fmt->plane_fmt[0].bytesperline;
 	frm->colorspace = pix_fmt->colorspace;
@@ -423,10 +419,10 @@ static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
 	frm->pix = *pix_fmt;
 
 	v4l2_dbg(debug, 1, &rga->v4l2_dev,
-		 "[%s] fmt - %p4cc %dx%d (stride %d, sizeimage %d)\n",
+		 "[%s] fmt - %p4cc %dx%d (stride %d)\n",
 		  V4L2_TYPE_IS_OUTPUT(f->type) ? "OUTPUT" : "CAPTURE",
 		  &frm->fmt->fourcc, frm->width, frm->height,
-		  frm->stride, frm->size);
+		  frm->stride);
 
 	for (i = 0; i < pix_fmt->num_planes; i++) {
 		v4l2_dbg(debug, 1, &rga->v4l2_dev,
diff --git a/drivers/media/platform/rockchip/rga/rga.h b/drivers/media/platform/rockchip/rga/rga.h
index 82ead58719f3baadb77575896ca2d430aa8e3dc6..5aedda2f187e4bfef42c8755c4fc4b1ee5453e8e 100644
--- a/drivers/media/platform/rockchip/rga/rga.h
+++ b/drivers/media/platform/rockchip/rga/rga.h
@@ -42,7 +42,6 @@ struct rga_frame {
 
 	/* Variables that can calculated once and reused */
 	u32 stride;
-	u32 size;
 };
 
 struct rga_dma_desc {

-- 
2.51.0