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Message-Id: <20251203-spu-rga3-v2-8-989a67947f71@pengutronix.de>
Date: Wed, 03 Dec 2025 16:52:30 +0100
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 v2 08/22] media: rockchip: rga: move cmdbuf to rga_ctx
Move the command buffer to the rga_ctx struct in preparation to reuse
an already prepared command buffer. Having a command buffer per context
allows to reuse the command buffer for other frames even when
multiple applications are using the RGA in at the same time.
Signed-off-by: Sven Püschel <s.pueschel@...gutronix.de>
---
drivers/media/platform/rockchip/rga/rga-hw.c | 28 +++++++---------
drivers/media/platform/rockchip/rga/rga.c | 48 ++++++++++++++++------------
drivers/media/platform/rockchip/rga/rga.h | 5 +--
3 files changed, 41 insertions(+), 40 deletions(-)
diff --git a/drivers/media/platform/rockchip/rga/rga-hw.c b/drivers/media/platform/rockchip/rga/rga-hw.c
index 7419784efc693..79bf911e74779 100644
--- a/drivers/media/platform/rockchip/rga/rga-hw.c
+++ b/drivers/media/platform/rockchip/rga/rga-hw.c
@@ -113,8 +113,7 @@ static struct rga_addr_offset *rga_lookup_draw_pos(struct
static void rga_cmd_set_src_addr(struct rga_ctx *ctx, dma_addr_t dma_addr)
{
- struct rockchip_rga *rga = ctx->rga;
- u32 *dest = rga->cmdbuf_virt;
+ u32 *dest = ctx->cmdbuf_virt;
unsigned int reg;
reg = RGA_MMU_SRC_BASE - RGA_MODE_BASE_REG;
@@ -126,8 +125,7 @@ static void rga_cmd_set_src_addr(struct rga_ctx *ctx, dma_addr_t dma_addr)
static void rga_cmd_set_src1_addr(struct rga_ctx *ctx, dma_addr_t dma_addr)
{
- struct rockchip_rga *rga = ctx->rga;
- u32 *dest = rga->cmdbuf_virt;
+ u32 *dest = ctx->cmdbuf_virt;
unsigned int reg;
reg = RGA_MMU_SRC1_BASE - RGA_MODE_BASE_REG;
@@ -139,8 +137,7 @@ static void rga_cmd_set_src1_addr(struct rga_ctx *ctx, dma_addr_t dma_addr)
static void rga_cmd_set_dst_addr(struct rga_ctx *ctx, dma_addr_t dma_addr)
{
- struct rockchip_rga *rga = ctx->rga;
- u32 *dest = rga->cmdbuf_virt;
+ u32 *dest = ctx->cmdbuf_virt;
unsigned int reg;
reg = RGA_MMU_DST_BASE - RGA_MODE_BASE_REG;
@@ -153,7 +150,7 @@ static void rga_cmd_set_dst_addr(struct rga_ctx *ctx, dma_addr_t dma_addr)
static void rga_cmd_set_trans_info(struct rga_ctx *ctx)
{
struct rockchip_rga *rga = ctx->rga;
- u32 *dest = rga->cmdbuf_virt;
+ u32 *dest = ctx->cmdbuf_virt;
unsigned int scale_dst_w, scale_dst_h;
unsigned int src_h, src_w, dst_h, dst_w;
union rga_src_info src_info;
@@ -313,8 +310,7 @@ static void rga_cmd_set_src_info(struct rga_ctx *ctx,
struct rga_addr_offset *offset)
{
struct rga_corners_addr_offset src_offsets;
- struct rockchip_rga *rga = ctx->rga;
- u32 *dest = rga->cmdbuf_virt;
+ u32 *dest = ctx->cmdbuf_virt;
unsigned int src_h, src_w, src_x, src_y;
src_h = ctx->in.crop.height;
@@ -341,8 +337,7 @@ static void rga_cmd_set_dst_info(struct rga_ctx *ctx,
{
struct rga_addr_offset *dst_offset;
struct rga_corners_addr_offset offsets;
- struct rockchip_rga *rga = ctx->rga;
- u32 *dest = rga->cmdbuf_virt;
+ u32 *dest = ctx->cmdbuf_virt;
unsigned int dst_h, dst_w, dst_x, dst_y;
unsigned int mir_mode = 0;
unsigned int rot_mode = 0;
@@ -388,8 +383,7 @@ static void rga_cmd_set_dst_info(struct rga_ctx *ctx,
static void rga_cmd_set_mode(struct rga_ctx *ctx)
{
- struct rockchip_rga *rga = ctx->rga;
- u32 *dest = rga->cmdbuf_virt;
+ u32 *dest = ctx->cmdbuf_virt;
union rga_mode_ctrl mode;
union rga_alpha_ctrl0 alpha_ctrl0;
union rga_alpha_ctrl1 alpha_ctrl1;
@@ -414,7 +408,7 @@ static void rga_cmd_set(struct rga_ctx *ctx,
{
struct rockchip_rga *rga = ctx->rga;
- memset(rga->cmdbuf_virt, 0, RGA_CMDBUF_SIZE * 4);
+ memset(ctx->cmdbuf_virt, 0, RGA_CMDBUF_SIZE * 4);
rga_cmd_set_src_addr(ctx, src->dma_desc_pa);
/*
@@ -430,11 +424,11 @@ static void rga_cmd_set(struct rga_ctx *ctx,
rga_cmd_set_dst_info(ctx, &dst->offset);
rga_cmd_set_trans_info(ctx);
- rga_write(rga, RGA_CMD_BASE, rga->cmdbuf_phy);
+ rga_write(rga, RGA_CMD_BASE, ctx->cmdbuf_phy);
/* sync CMD buf for RGA */
- dma_sync_single_for_device(rga->dev, rga->cmdbuf_phy,
- PAGE_SIZE, DMA_BIDIRECTIONAL);
+ dma_sync_single_for_device(rga->dev, ctx->cmdbuf_phy,
+ PAGE_SIZE, DMA_BIDIRECTIONAL);
}
static void rga_hw_start(struct rockchip_rga *rga,
diff --git a/drivers/media/platform/rockchip/rga/rga.c b/drivers/media/platform/rockchip/rga/rga.c
index d8b14c2d9f6a4..74d94c7fe31ff 100644
--- a/drivers/media/platform/rockchip/rga/rga.c
+++ b/drivers/media/platform/rockchip/rga/rga.c
@@ -219,6 +219,16 @@ static int rga_open(struct file *file)
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
+
+ /* Create CMD buffer */
+ ctx->cmdbuf_virt = dma_alloc_attrs(rga->dev, rga->hw->cmdbuf_size,
+ &ctx->cmdbuf_phy, GFP_KERNEL,
+ DMA_ATTR_WRITE_COMBINE);
+ if (!ctx->cmdbuf_virt) {
+ ret = -ENOMEM;
+ goto rel_ctx;
+ }
+
ctx->rga = rga;
/* Set default formats */
ctx->in = def_frame;
@@ -230,15 +240,13 @@ static int rga_open(struct file *file)
ctx->out.fmt->fourcc, def_width, def_height);
if (mutex_lock_interruptible(&rga->mutex)) {
- kfree(ctx);
- return -ERESTARTSYS;
+ ret = -ERESTARTSYS;
+ goto rel_cmdbuf;
}
ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(rga->m2m_dev, ctx, &queue_init);
if (IS_ERR(ctx->fh.m2m_ctx)) {
ret = PTR_ERR(ctx->fh.m2m_ctx);
- mutex_unlock(&rga->mutex);
- kfree(ctx);
- return ret;
+ goto unlock_mutex;
}
v4l2_fh_init(&ctx->fh, video_devdata(file));
v4l2_fh_add(&ctx->fh, file);
@@ -252,6 +260,15 @@ static int rga_open(struct file *file)
mutex_unlock(&rga->mutex);
return 0;
+
+unlock_mutex:
+ mutex_unlock(&rga->mutex);
+rel_cmdbuf:
+ dma_free_attrs(rga->dev, rga->hw->cmdbuf_size, ctx->cmdbuf_virt,
+ ctx->cmdbuf_phy, DMA_ATTR_WRITE_COMBINE);
+rel_ctx:
+ kfree(ctx);
+ return ret;
}
static int rga_release(struct file *file)
@@ -266,6 +283,10 @@ static int rga_release(struct file *file)
v4l2_ctrl_handler_free(&ctx->ctrl_handler);
v4l2_fh_del(&ctx->fh, file);
v4l2_fh_exit(&ctx->fh);
+
+ dma_free_attrs(rga->dev, rga->hw->cmdbuf_size, ctx->cmdbuf_virt,
+ ctx->cmdbuf_phy, DMA_ATTR_WRITE_COMBINE);
+
kfree(ctx);
mutex_unlock(&rga->mutex);
@@ -674,19 +695,10 @@ static int rga_probe(struct platform_device *pdev)
pm_runtime_put(rga->dev);
- /* Create CMD buffer */
- rga->cmdbuf_virt = dma_alloc_attrs(rga->dev, rga->hw->cmdbuf_size,
- &rga->cmdbuf_phy, GFP_KERNEL,
- DMA_ATTR_WRITE_COMBINE);
- if (!rga->cmdbuf_virt) {
- ret = -ENOMEM;
- goto rel_m2m;
- }
-
ret = video_register_device(vfd, VFL_TYPE_VIDEO, -1);
if (ret) {
v4l2_err(&rga->v4l2_dev, "Failed to register video device\n");
- goto free_dma;
+ goto rel_m2m;
}
v4l2_info(&rga->v4l2_dev, "Registered %s as /dev/%s\n",
@@ -694,9 +706,6 @@ static int rga_probe(struct platform_device *pdev)
return 0;
-free_dma:
- dma_free_attrs(rga->dev, rga->hw->cmdbuf_size, rga->cmdbuf_virt,
- rga->cmdbuf_phy, DMA_ATTR_WRITE_COMBINE);
rel_m2m:
v4l2_m2m_release(rga->m2m_dev);
rel_vdev:
@@ -713,9 +722,6 @@ static void rga_remove(struct platform_device *pdev)
{
struct rockchip_rga *rga = platform_get_drvdata(pdev);
- dma_free_attrs(rga->dev, rga->hw->cmdbuf_size, rga->cmdbuf_virt,
- rga->cmdbuf_phy, DMA_ATTR_WRITE_COMBINE);
-
v4l2_info(&rga->v4l2_dev, "Removing\n");
v4l2_m2m_release(rga->m2m_dev);
diff --git a/drivers/media/platform/rockchip/rga/rga.h b/drivers/media/platform/rockchip/rga/rga.h
index 98635ddd50d7c..f8c932fdec21a 100644
--- a/drivers/media/platform/rockchip/rga/rga.h
+++ b/drivers/media/platform/rockchip/rga/rga.h
@@ -56,6 +56,9 @@ struct rga_ctx {
struct rga_frame out;
struct v4l2_ctrl_handler ctrl_handler;
+ void *cmdbuf_virt;
+ dma_addr_t cmdbuf_phy;
+
int osequence;
int csequence;
@@ -91,8 +94,6 @@ struct rockchip_rga {
spinlock_t ctrl_lock;
struct rga_ctx *curr;
- dma_addr_t cmdbuf_phy;
- void *cmdbuf_virt;
const struct rga_hw *hw;
};
--
2.52.0
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