[RFC PATCH v3 0/6] accel/rocket: RK3576 NPU (RKNN) enablement

[RFC PATCH v3 0/6] accel/rocket: RK3576 NPU (RKNN) enablement

[Jiaxing Hu]

This adds RK3576 NPU support to accel/rocket. Still RFC: the NPU brings up
and runs, but inference is not correct yet. The open bug moved a long way
since v2, so it is worth describing.

Tested on a Radxa ROCK 4D, on next-20260730.

The two iommu patches from v2 are gone from this series. Will picked them
up and they are in linux-next as 841363ebb508 and b10d5920cafa.

What is still wrong
===================

A single convolution is byte exact. Running that same convolution again,
six times in one power session, is byte exact every time. What fails is
running a different one after it: the second configuration loaded into the
block computes nothing and writes out a zero point surface, while the one
already resident keeps working. Going back to it is byte exact again, and
the same holds with the two models swapped, so it is not about which model
is which.

The register command list is identical in both positions, byte for byte, so
it is not what we program. A full NPU reset clears it. With one before every
op, per layer input and weight fetch return at the graph's real shapes and
the DPU writes back, but what lands is still zero point. So dispatch, DMA
and write back are all fine, and the multiply accumulate is what produces
nothing.

That is as far as I have got. If anyone knows the RK3576 NPU internals, the
question is what a second configuration load has to do that the first does
not.

Changes in v3
=============

  * dt-bindings: reject sram-supply on non-rk3588 via an allOf else, and
    drop the commit message paragraph explaining the schema (Krzysztof)

  * pmdomain: rename DOMAIN_M_O_R_G to DOMAIN_M_O_R_G_W rather than
    extending it, since the suffixes name the fields it sets and RK3576 is
    its only user (Heiko). Drop a stray whitespace hunk.

  * accel/rocket: v2 said PC_DONE could not be routed to the GIC and polled
    it instead. That reason was wrong, and the bits it polled turn out to be
    permanently latched, so the poll condition was always already true.
    RK3576 now arms the same DPU completion as RK3588 and samples
    INTERRUPT_RAW_STATUS for it, because on this SoC the interrupt does not
    reach the GIC. Verified on hardware: without the sampling every job sits
    until the scheduler timeout (525 ms per job, 195 timeouts in one run);
    with it, jobs finish in 10.8 ms and six repeats are byte exact.

  * iommu: both patches dropped, now in linux-next.

Note on overlap: patch 4 sets core->clks[].id for all six clocks. Igor
Paunovic has a standalone fix for the first four in flight
(20260729092939.118779-1-royalnet026@gmail.com). Once that lands this hunk
reduces to the two CBUF entries.

I used Claude Opus 4.8 to help prepare this series and its diffs.

Jiaxing Hu (6):
  dt-bindings: npu: rockchip: add rockchip,rk3576-rknn-core
  pmdomain/rockchip: add optional per-domain power-on settle delay
  pmdomain/rockchip: cycle optional power-domain resets on power-on
  accel/rocket: add RK3576 NPU (RKNN) support
  arm64: dts: rockchip: rk3576: add NPU (RKNN) nodes
  arm64: dts: rockchip: rk3576-rock-4d: enable NPU

 .../npu/rockchip,rk3588-rknn-core.yaml        | 15 +++-
 .../boot/dts/rockchip/rk3576-rock-4d.dts      | 16 ++++
 arch/arm64/boot/dts/rockchip/rk3576.dtsi      | 78 ++++++++++++++++++-
 drivers/accel/rocket/rocket_core.c            | 26 ++++++-
 drivers/accel/rocket/rocket_core.h            | 17 +++-
 drivers/accel/rocket/rocket_device.c          |  4 +
 drivers/accel/rocket/rocket_drv.c             | 22 +++++-
 drivers/accel/rocket/rocket_job.c             | 55 +++++++++++++
 drivers/pmdomain/rockchip/pm-domains.c        | 71 +++++++++++------
 9 files changed, 273 insertions(+), 31 deletions(-)

-- 
2.43.0


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[RFC PATCH v3 1/6] dt-bindings: npu: rockchip: add rockchip,rk3576-rknn-core

[Jiaxing Hu]

The RK3576 NPU has two cores of the same RKNN block the RK3588 binding
already describes, but no NPU SRAM supply, so sram-supply is required
for rockchip,rk3588-rknn-core only and rejected otherwise.

Signed-off-by: Jiaxing Hu <gahing@gahingwoo.com>
---
 .../bindings/npu/rockchip,rk3588-rknn-core.yaml   | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml b/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
index caca2a490..0a7baac24 100644
--- a/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
+++ b/Documentation/devicetree/bindings/npu/rockchip,rk3588-rknn-core.yaml
@@ -21,6 +21,7 @@ properties:
 
   compatible:
     enum:
+      - rockchip,rk3576-rknn-core
       - rockchip,rk3588-rknn-core
 
   reg:
@@ -75,7 +76,19 @@ required:
   - resets
   - reset-names
   - npu-supply
-  - sram-supply
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: rockchip,rk3588-rknn-core
+    then:
+      required:
+        - sram-supply
+    else:
+      properties:
+        sram-supply: false
 
 additionalProperties: false
 
-- 
2.43.0


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[RFC PATCH v3 2/6] pmdomain/rockchip: add optional per-domain power-on settle delay

[Jiaxing Hu]

The RK3576 NPU domains need a short settle time after the idle request
is released before the QoS registers behind the domain answer. Without
it rockchip_pmu_restore_qos() reads back zeroes, and the NPU throws an
async SError on the first cold power-on.

Give rockchip_domain_info an optional delay_us and wait for it between
releasing idle and restoring QoS. Rename DOMAIN_M_O_R_G to
DOMAIN_M_O_R_G_W, since the suffixes name the fields the macro sets and
this one now also carries a wakeup delay; RK3576 is its only user, so
the old spelling is not kept around.

Signed-off-by: Jiaxing Hu <gahing@gahingwoo.com>
---
 drivers/pmdomain/rockchip/pm-domains.c | 52 +++++++++++++++-----------
 1 file changed, 30 insertions(+), 22 deletions(-)

diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c
index ba66ae719..e1857f878 100644
--- a/drivers/pmdomain/rockchip/pm-domains.c
+++ b/drivers/pmdomain/rockchip/pm-domains.c
@@ -18,6 +18,7 @@
 #include <linux/of_address.h>
 #include <linux/of_clk.h>
 #include <linux/clk.h>
+#include <linux/delay.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/mfd/syscon.h>
@@ -59,6 +60,7 @@ struct rockchip_domain_info {
 	u32 pwr_offset;
 	u32 mem_offset;
 	u32 req_offset;
+	u32 delay_us;
 };
 
 struct rockchip_pmu_info {
@@ -185,7 +187,7 @@ struct rockchip_pmu {
 	.need_regulator = regulator,			\
 }
 
-#define DOMAIN_M_O_R_G(_name, p_offset, pwr, status, m_offset, m_status, r_status, r_offset, req, idle, ack, g_mask, wakeup)	\
+#define DOMAIN_M_O_R_G_W(_name, p_offset, pwr, status, m_offset, m_status, r_status, r_offset, req, idle, ack, g_mask, delay, wakeup)	\
 {							\
 	.name = _name,					\
 	.pwr_offset = p_offset,				\
@@ -200,6 +202,7 @@ struct rockchip_pmu {
 	.req_mask = (req),				\
 	.idle_mask = (idle),				\
 	.clk_ungate_mask = (g_mask),			\
+	.delay_us = (delay),				\
 	.ack_mask = (ack),				\
 	.active_wakeup = wakeup,			\
 }
@@ -258,8 +261,8 @@ struct rockchip_pmu {
 #define DOMAIN_RK3568(name, pwr, req, wakeup, regulator)		\
 	DOMAIN_M_R(name, pwr, pwr, req, req, req, wakeup, regulator)
 
-#define DOMAIN_RK3576(name, p_offset, pwr, status, r_status, r_offset, req, idle, g_mask, wakeup)	\
-	DOMAIN_M_O_R_G(name, p_offset, pwr, status, 0, r_status, r_status, r_offset, req, idle, idle, g_mask, wakeup)
+#define DOMAIN_RK3576(name, p_offset, pwr, status, r_status, r_offset, req, idle, g_mask, delay, wakeup)	\
+	DOMAIN_M_O_R_G_W(name, p_offset, pwr, status, 0, r_status, r_status, r_offset, req, idle, idle, g_mask, delay, wakeup)
 
 /*
  * Dynamic Memory Controller may need to coordinate with us -- see
@@ -681,6 +684,10 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
 		if (ret < 0)
 			goto out;
 
+		/* Some domains need to settle before the QoS registers answer. */
+		if (pd->info->delay_us)
+			udelay(pd->info->delay_us);
+
 		rockchip_pmu_restore_qos(pd);
 	}
 
@@ -1300,25 +1307,26 @@ static const struct rockchip_domain_info rk3568_pm_domains[] = {
 };
 
 static const struct rockchip_domain_info rk3576_pm_domains[] = {
-	[RK3576_PD_NPU]		= DOMAIN_RK3576("npu",    0x0, BIT(0),  BIT(0), 0,       0x0, 0,       0,       0,       false),
-	[RK3576_PD_NVM]		= DOMAIN_RK3576("nvm",    0x0, BIT(6),  0,      BIT(6),  0x4, BIT(2),  BIT(18), BIT(2),  false),
-	[RK3576_PD_SDGMAC]	= DOMAIN_RK3576("sdgmac", 0x0, BIT(7),  0,      BIT(7),  0x4, BIT(1),  BIT(17), 0x6,     false),
-	[RK3576_PD_AUDIO]	= DOMAIN_RK3576("audio",  0x0, BIT(8),  0,      BIT(8),  0x4, BIT(0),  BIT(16), BIT(0),  false),
-	[RK3576_PD_PHP]		= DOMAIN_RK3576("php",    0x0, BIT(9),  0,      BIT(9),  0x0, BIT(15), BIT(15), BIT(15), false),
-	[RK3576_PD_SUBPHP]	= DOMAIN_RK3576("subphp", 0x0, BIT(10), 0,      BIT(10), 0x0, 0,       0,       0,       false),
-	[RK3576_PD_VOP]		= DOMAIN_RK3576("vop",    0x0, BIT(11), 0,      BIT(11), 0x0, 0x6000,  0x6000,  0x6000,  false),
-	[RK3576_PD_VO1]		= DOMAIN_RK3576("vo1",    0x0, BIT(14), 0,      BIT(14), 0x0, BIT(12), BIT(12), 0x7000,  false),
-	[RK3576_PD_VO0]		= DOMAIN_RK3576("vo0",    0x0, BIT(15), 0,      BIT(15), 0x0, BIT(11), BIT(11), 0x6800,  false),
-	[RK3576_PD_USB]		= DOMAIN_RK3576("usb",    0x4, BIT(0),  0,      BIT(16), 0x0, BIT(10), BIT(10), 0x6400,  true),
-	[RK3576_PD_VI]		= DOMAIN_RK3576("vi",     0x4, BIT(1),  0,      BIT(17), 0x0, BIT(9),  BIT(9),  BIT(9),  false),
-	[RK3576_PD_VEPU0]	= DOMAIN_RK3576("vepu0",  0x4, BIT(2),  0,      BIT(18), 0x0, BIT(7),  BIT(7),  0x280,   false),
-	[RK3576_PD_VEPU1]	= DOMAIN_RK3576("vepu1",  0x4, BIT(3),  0,      BIT(19), 0x0, BIT(8),  BIT(8),  BIT(8),  false),
-	[RK3576_PD_VDEC]	= DOMAIN_RK3576("vdec",   0x4, BIT(4),  0,      BIT(20), 0x0, BIT(6),  BIT(6),  BIT(6),  false),
-	[RK3576_PD_VPU]		= DOMAIN_RK3576("vpu",    0x4, BIT(5),  0,      BIT(21), 0x0, BIT(5),  BIT(5),  BIT(5),  false),
-	[RK3576_PD_NPUTOP]	= DOMAIN_RK3576("nputop", 0x4, BIT(6),  0,      BIT(22), 0x0, 0x18,    0x18,    0x18,    false),
-	[RK3576_PD_NPU0]	= DOMAIN_RK3576("npu0",   0x4, BIT(7),  0,      BIT(23), 0x0, BIT(1),  BIT(1),  0x1a,    false),
-	[RK3576_PD_NPU1]	= DOMAIN_RK3576("npu1",   0x4, BIT(8),  0,      BIT(24), 0x0, BIT(2),  BIT(2),  0x1c,    false),
-	[RK3576_PD_GPU]		= DOMAIN_RK3576("gpu",    0x4, BIT(9),  0,      BIT(25), 0x0, BIT(0),  BIT(0),  BIT(0),  false),
+	/*                                            name    p_offset pwr      status  r_status r_offset req      idle     g_mask   delay wakeup */
+	[RK3576_PD_NPU]		= DOMAIN_RK3576("npu",    0x0, BIT(0),  BIT(0), 0,       0x0, 0,       0,       0,       0,    false),
+	[RK3576_PD_NVM]		= DOMAIN_RK3576("nvm",    0x0, BIT(6),  0,      BIT(6),  0x4, BIT(2),  BIT(18), BIT(2),  0,    false),
+	[RK3576_PD_SDGMAC]	= DOMAIN_RK3576("sdgmac", 0x0, BIT(7),  0,      BIT(7),  0x4, BIT(1),  BIT(17), 0x6,     0,    false),
+	[RK3576_PD_AUDIO]	= DOMAIN_RK3576("audio",  0x0, BIT(8),  0,      BIT(8),  0x4, BIT(0),  BIT(16), BIT(0),  0,    false),
+	[RK3576_PD_PHP]		= DOMAIN_RK3576("php",    0x0, BIT(9),  0,      BIT(9),  0x0, BIT(15), BIT(15), BIT(15), 0,    false),
+	[RK3576_PD_SUBPHP]	= DOMAIN_RK3576("subphp", 0x0, BIT(10), 0,      BIT(10), 0x0, 0,       0,       0,       0,    false),
+	[RK3576_PD_VOP]		= DOMAIN_RK3576("vop",    0x0, BIT(11), 0,      BIT(11), 0x0, 0x6000,  0x6000,  0x6000,  0,    false),
+	[RK3576_PD_VO1]		= DOMAIN_RK3576("vo1",    0x0, BIT(14), 0,      BIT(14), 0x0, BIT(12), BIT(12), 0x7000,  0,    false),
+	[RK3576_PD_VO0]		= DOMAIN_RK3576("vo0",    0x0, BIT(15), 0,      BIT(15), 0x0, BIT(11), BIT(11), 0x6800,  0,    false),
+	[RK3576_PD_USB]		= DOMAIN_RK3576("usb",    0x4, BIT(0),  0,      BIT(16), 0x0, BIT(10), BIT(10), 0x6400,  0,    true),
+	[RK3576_PD_VI]		= DOMAIN_RK3576("vi",     0x4, BIT(1),  0,      BIT(17), 0x0, BIT(9),  BIT(9),  BIT(9),  0,    false),
+	[RK3576_PD_VEPU0]	= DOMAIN_RK3576("vepu0",  0x4, BIT(2),  0,      BIT(18), 0x0, BIT(7),  BIT(7),  0x280,   0,    false),
+	[RK3576_PD_VEPU1]	= DOMAIN_RK3576("vepu1",  0x4, BIT(3),  0,      BIT(19), 0x0, BIT(8),  BIT(8),  BIT(8),  0,    false),
+	[RK3576_PD_VDEC]	= DOMAIN_RK3576("vdec",   0x4, BIT(4),  0,      BIT(20), 0x0, BIT(6),  BIT(6),  BIT(6),  0,    false),
+	[RK3576_PD_VPU]		= DOMAIN_RK3576("vpu",    0x4, BIT(5),  0,      BIT(21), 0x0, BIT(5),  BIT(5),  BIT(5),  0,    false),
+	[RK3576_PD_NPUTOP]	= DOMAIN_RK3576("nputop", 0x4, BIT(6),  0,      BIT(22), 0x0, 0x18,    0x18,    0x18,    15,   false),
+	[RK3576_PD_NPU0]	= DOMAIN_RK3576("npu0",   0x4, BIT(7),  0,      BIT(23), 0x0, BIT(1),  BIT(1),  0x1a,    15,   false),
+	[RK3576_PD_NPU1]	= DOMAIN_RK3576("npu1",   0x4, BIT(8),  0,      BIT(24), 0x0, BIT(2),  BIT(2),  0x1c,    15,   false),
+	[RK3576_PD_GPU]		= DOMAIN_RK3576("gpu",    0x4, BIT(9),  0,      BIT(25), 0x0, BIT(0),  BIT(0),  BIT(0),  0,    false),
 };
 
 static const struct rockchip_domain_info rk3588_pm_domains[] = {
-- 
2.43.0


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[RFC PATCH v3 3/6] pmdomain/rockchip: cycle optional power-domain resets on power-on

[Jiaxing Hu]

Some Rockchip domains come out of power-on with their bus interface in
an undefined state. On the RK3576 NPU this shows up as a hang on the
first access after a cold power-on; the vendor kernel cycles the
domain's resets at this point and that clears it.

Take the domain node's resets if it has any, and pulse them between
releasing idle and restoring QoS. The resets are optional, so domains
that do not declare any behave exactly as before.

Signed-off-by: Jiaxing Hu <gahing@gahingwoo.com>
---
 drivers/pmdomain/rockchip/pm-domains.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c
index e1857f878..82051f600 100644
--- a/drivers/pmdomain/rockchip/pm-domains.c
+++ b/drivers/pmdomain/rockchip/pm-domains.c
@@ -19,6 +19,7 @@
 #include <linux/of_clk.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
+#include <linux/reset.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/mfd/syscon.h>
@@ -103,6 +104,7 @@ struct rockchip_pm_domain {
 	struct clk_bulk_data *clks;
 	struct device_node *node;
 	struct regulator *supply;
+	struct reset_control *resets;
 };
 
 struct rockchip_pmu {
@@ -688,6 +690,13 @@ static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
 		if (pd->info->delay_us)
 			udelay(pd->info->delay_us);
 
+		/* Optional: some domains need their resets cycled after power-on. */
+		if (pd->resets) {
+			reset_control_assert(pd->resets);
+			udelay(10);
+			reset_control_deassert(pd->resets);
+		}
+
 		rockchip_pmu_restore_qos(pd);
 	}
 
@@ -857,6 +866,14 @@ static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
 	if (error)
 		goto err_put_clocks;
 
+	pd->resets = of_reset_control_array_get_optional_exclusive(node);
+	if (IS_ERR(pd->resets)) {
+		error = PTR_ERR(pd->resets);
+		dev_err(pmu->dev, "%pOFn: failed to get resets: %d\n", node, error);
+		pd->resets = NULL;
+		goto err_unprepare_clocks;
+	}
+
 	pd->num_qos = of_count_phandle_with_args(node, "pm_qos",
 						 NULL);
 
@@ -927,6 +944,7 @@ static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
 	clk_bulk_unprepare(pd->num_clks, pd->clks);
 err_put_clocks:
 	clk_bulk_put(pd->num_clks, pd->clks);
+	reset_control_put(pd->resets);
 	return error;
 }
 
@@ -945,6 +963,7 @@ static void rockchip_pm_remove_one_domain(struct rockchip_pm_domain *pd)
 
 	clk_bulk_unprepare(pd->num_clks, pd->clks);
 	clk_bulk_put(pd->num_clks, pd->clks);
+	reset_control_put(pd->resets);
 
 	/* protect the zeroing of pm->num_clks */
 	mutex_lock(&pd->pmu->mutex);
-- 
2.43.0


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[RFC PATCH v3 4/6] accel/rocket: add RK3576 NPU (RKNN) support

[Jiaxing Hu]

The RK3576 carries the same RKNN block as the RK3588, with two cores
instead of three and a few platform differences:

 - the CBUF (convolution buffer) has its own clock domain, so the core
   needs six clocks rather than four;
 - the BIU reset moved into the power domain, leaving one reset here;
 - the NPU spans two power domains, and a device with more than one is
   skipped by the driver-core single-domain auto-attach, so the list has
   to be attached explicitly;
 - the DPU completion interrupt is armed exactly as on RK3588 but never
   reaches the GIC. The completion is visible in INTERRUPT_RAW_STATUS,
   so sample that from an hrtimer rather than wait for an interrupt that
   does not come. The interrupt stays armed, so if it ever does arrive
   the normal handler finalises the job first.

Select all of that from of_device_id match data so the RK3588 path keeps
its existing counts and behaviour unchanged.

Signed-off-by: Jiaxing Hu <gahing@gahingwoo.com>
---
 drivers/accel/rocket/rocket_core.c   | 26 ++++++++++++-
 drivers/accel/rocket/rocket_core.h   | 17 ++++++++-
 drivers/accel/rocket/rocket_device.c |  4 ++
 drivers/accel/rocket/rocket_drv.c    | 22 +++++++++--
 drivers/accel/rocket/rocket_job.c    | 55 ++++++++++++++++++++++++++++
 5 files changed, 118 insertions(+), 6 deletions(-)

diff --git a/drivers/accel/rocket/rocket_core.c b/drivers/accel/rocket/rocket_core.c
index b3b2fa9ba..e08288c8c 100644
--- a/drivers/accel/rocket/rocket_core.c
+++ b/drivers/accel/rocket/rocket_core.c
@@ -8,6 +8,7 @@
 #include <linux/err.h>
 #include <linux/iommu.h>
 #include <linux/platform_device.h>
+#include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
 
@@ -21,14 +22,22 @@ int rocket_core_init(struct rocket_core *core)
 	u32 version;
 	int err = 0;
 
+	/* RK3576 moves the BIU reset into its power domain and takes only srst_a. */
 	core->resets[0].id = "srst_a";
 	core->resets[1].id = "srst_h";
-	err = devm_reset_control_bulk_get_exclusive(&pdev->dev, ARRAY_SIZE(core->resets),
+	err = devm_reset_control_bulk_get_exclusive(&pdev->dev, core->soc->num_resets,
 						    core->resets);
 	if (err)
 		return dev_err_probe(dev, err, "failed to get resets for core %d\n", core->index);
 
-	err = devm_clk_bulk_get(dev, ARRAY_SIZE(core->clks), core->clks);
+	core->clks[0].id = "aclk";
+	core->clks[1].id = "hclk";
+	core->clks[2].id = "npu";
+	core->clks[3].id = "pclk";
+	/* RK3576 clocks the CBUF separately; the compute path stalls without these. */
+	core->clks[4].id = "aclk_cbuf";
+	core->clks[5].id = "hclk_cbuf";
+	err = devm_clk_bulk_get(dev, core->soc->num_clks, core->clks);
 	if (err)
 		return dev_err_probe(dev, err, "failed to get clocks for core %d\n", core->index);
 
@@ -65,6 +74,19 @@ int rocket_core_init(struct rocket_core *core)
 		return err;
 	}
 
+	/*
+	 * RK3576 spans two power domains, and a multi-domain device is skipped
+	 * by the driver-core single-domain auto-attach, so attach the list here.
+	 */
+	if (core->soc->multi_power_domain) {
+		struct dev_pm_domain_list *pd_list;
+
+		err = devm_pm_domain_attach_list(dev, NULL, &pd_list);
+		if (err < 0)
+			return dev_err_probe(dev, err,
+					     "failed to attach NPU power domains\n");
+	}
+
 	pm_runtime_use_autosuspend(dev);
 
 	/*
diff --git a/drivers/accel/rocket/rocket_core.h b/drivers/accel/rocket/rocket_core.h
index f6d738285..6afb8180a 100644
--- a/drivers/accel/rocket/rocket_core.h
+++ b/drivers/accel/rocket/rocket_core.h
@@ -6,6 +6,7 @@
 
 #include <drm/gpu_scheduler.h>
 #include <linux/clk.h>
+#include <linux/hrtimer.h>
 #include <linux/io.h>
 #include <linux/mutex_types.h>
 #include <linux/reset.h>
@@ -27,16 +28,25 @@
 #define rocket_core_writel(core, reg, value) \
 	writel(value, (core)->core_iomem + (REG_CORE_##reg) - REG_CORE_S_STATUS)
 
+/* Per-SoC differences, selected by the of_device_id match data. */
+struct rocket_soc_data {
+	unsigned int num_clks;		/* clk_bulk count: 4 base, 6 with CBUF */
+	unsigned int num_resets;	/* reset_bulk count: 2 base, 1 on RK3576 */
+	bool multi_power_domain;	/* device spans more than one PM domain */
+	bool poll_completion;		/* completion IRQ never reaches the GIC */
+};
+
 struct rocket_core {
 	struct device *dev;
 	struct rocket_device *rdev;
+	const struct rocket_soc_data *soc;
 	unsigned int index;
 
 	int irq;
 	void __iomem *pc_iomem;
 	void __iomem *cna_iomem;
 	void __iomem *core_iomem;
-	struct clk_bulk_data clks[4];
+	struct clk_bulk_data clks[6];
 	struct reset_control_bulk_data resets[2];
 
 	struct iommu_group *iommu_group;
@@ -52,6 +62,11 @@ struct rocket_core {
 		atomic_t pending;
 	} reset;
 
+	struct hrtimer poll_timer;
+	struct work_struct poll_work;
+	atomic_t poll_active;
+	unsigned int poll_ticks;
+
 	struct drm_gpu_scheduler sched;
 	u64 fence_context;
 	u64 emit_seqno;
diff --git a/drivers/accel/rocket/rocket_device.c b/drivers/accel/rocket/rocket_device.c
index 46e6ee1e7..bfb00f967 100644
--- a/drivers/accel/rocket/rocket_device.c
+++ b/drivers/accel/rocket/rocket_device.c
@@ -31,6 +31,10 @@ struct rocket_device *rocket_device_init(struct platform_device *pdev,
 		if (of_device_is_available(core_node))
 			num_cores++;
 
+	for_each_compatible_node(core_node, NULL, "rockchip,rk3576-rknn-core")
+		if (of_device_is_available(core_node))
+			num_cores++;
+
 	rdev->cores = devm_kcalloc(dev, num_cores, sizeof(*rdev->cores), GFP_KERNEL);
 	if (!rdev->cores)
 		return ERR_PTR(-ENOMEM);
diff --git a/drivers/accel/rocket/rocket_drv.c b/drivers/accel/rocket/rocket_drv.c
index 8bbbce594..7f7dfa374 100644
--- a/drivers/accel/rocket/rocket_drv.c
+++ b/drivers/accel/rocket/rocket_drv.c
@@ -176,6 +176,7 @@ static int rocket_probe(struct platform_device *pdev)
 
 	rdev->cores[core].rdev = rdev;
 	rdev->cores[core].dev = &pdev->dev;
+	rdev->cores[core].soc = of_device_get_match_data(&pdev->dev);
 	rdev->cores[core].index = core;
 
 	rdev->num_cores++;
@@ -213,8 +214,23 @@ static void rocket_remove(struct platform_device *pdev)
 	}
 }
 
+static const struct rocket_soc_data rk3588_soc_data = {
+	.num_clks = 4,
+	.num_resets = 2,
+	.multi_power_domain = false,
+	.poll_completion = false,
+};
+
+static const struct rocket_soc_data rk3576_soc_data = {
+	.num_clks = 6,
+	.num_resets = 1,
+	.multi_power_domain = true,
+	.poll_completion = true,
+};
+
 static const struct of_device_id dt_match[] = {
-	{ .compatible = "rockchip,rk3588-rknn-core" },
+	{ .compatible = "rockchip,rk3588-rknn-core", .data = &rk3588_soc_data },
+	{ .compatible = "rockchip,rk3576-rknn-core", .data = &rk3576_soc_data },
 	{}
 };
 MODULE_DEVICE_TABLE(of, dt_match);
@@ -240,7 +256,7 @@ static int rocket_device_runtime_resume(struct device *dev)
 	if (core < 0)
 		return -ENODEV;
 
-	err = clk_bulk_prepare_enable(ARRAY_SIZE(rdev->cores[core].clks), rdev->cores[core].clks);
+	err = clk_bulk_prepare_enable(rdev->cores[core].soc->num_clks, rdev->cores[core].clks);
 	if (err) {
 		dev_err(dev, "failed to enable (%d) clocks for core %d\n", err, core);
 		return err;
@@ -260,7 +276,7 @@ static int rocket_device_runtime_suspend(struct device *dev)
 	if (!rocket_job_is_idle(&rdev->cores[core]))
 		return -EBUSY;
 
-	clk_bulk_disable_unprepare(ARRAY_SIZE(rdev->cores[core].clks), rdev->cores[core].clks);
+	clk_bulk_disable_unprepare(rdev->cores[core].soc->num_clks, rdev->cores[core].clks);
 
 	return 0;
 }
diff --git a/drivers/accel/rocket/rocket_job.c b/drivers/accel/rocket/rocket_job.c
index bb77b6bf0..e9103a930 100644
--- a/drivers/accel/rocket/rocket_job.c
+++ b/drivers/accel/rocket/rocket_job.c
@@ -7,6 +7,7 @@
 #include <drm/drm_file.h>
 #include <drm/drm_gem.h>
 #include <drm/rocket_accel.h>
+#include <linux/hrtimer.h>
 #include <linux/interrupt.h>
 #include <linux/overflow.h>
 #include <linux/iommu.h>
@@ -21,6 +22,15 @@
 
 #define JOB_TIMEOUT_MS 500
 
+/*
+ * RK3576 arms the same DPU completion as RK3588, but the interrupt never
+ * reaches the GIC. The completion itself is visible in INTERRUPT_RAW_STATUS,
+ * so sample that instead. The tick cap bounds jobs that never raise it at all,
+ * which is the same open problem as the wrong inference results.
+ */
+#define RK3576_POLL_INTERVAL_NS	1000000LL	/* 1 ms */
+#define RK3576_POLL_MAX_TICKS	8
+
 static struct rocket_job *
 to_rocket_job(struct drm_sched_job *sched_job)
 {
@@ -151,6 +161,13 @@ static void rocket_job_hw_submit(struct rocket_core *core, struct rocket_job *jo
 
 	rocket_pc_writel(core, OPERATION_ENABLE, PC_OPERATION_ENABLE_OP_EN(1));
 
+	if (core->soc->poll_completion) {
+		core->poll_ticks = 0;
+		atomic_set(&core->poll_active, 1);
+		hrtimer_start(&core->poll_timer, ns_to_ktime(RK3576_POLL_INTERVAL_NS),
+			      HRTIMER_MODE_REL);
+	}
+
 	dev_dbg(core->dev, "Submitted regcmd at 0x%llx to core %d", task->regcmd, core->index);
 }
 
@@ -341,8 +358,42 @@ static struct dma_fence *rocket_job_run(struct drm_sched_job *sched_job)
 	return ERR_PTR(ret);
 }
 
+static void rocket_job_handle_irq(struct rocket_core *core);
+
+static enum hrtimer_restart rocket_poll_timer_fn(struct hrtimer *timer)
+{
+	struct rocket_core *core = container_of(timer, struct rocket_core, poll_timer);
+	u32 raw;
+
+	if (!atomic_read(&core->poll_active))
+		return HRTIMER_NORESTART;
+
+	raw = rocket_pc_readl(core, INTERRUPT_RAW_STATUS);
+	if ((raw & (PC_INTERRUPT_RAW_STATUS_DPU_0 | PC_INTERRUPT_RAW_STATUS_DPU_1)) ||
+	    ++core->poll_ticks >= RK3576_POLL_MAX_TICKS) {
+		atomic_set(&core->poll_active, 0);
+		schedule_work(&core->poll_work);
+		return HRTIMER_NORESTART;
+	}
+
+	hrtimer_forward_now(timer, ns_to_ktime(RK3576_POLL_INTERVAL_NS));
+	return HRTIMER_RESTART;
+}
+
+static void rocket_poll_work_fn(struct work_struct *work)
+{
+	struct rocket_core *core = container_of(work, struct rocket_core, poll_work);
+
+	rocket_job_handle_irq(core);
+}
+
 static void rocket_job_handle_irq(struct rocket_core *core)
 {
+	if (core->soc->poll_completion) {
+		atomic_set(&core->poll_active, 0);
+		hrtimer_cancel(&core->poll_timer);
+	}
+
 	pm_runtime_mark_last_busy(core->dev);
 
 	rocket_pc_writel(core, OPERATION_ENABLE, 0x0);
@@ -460,6 +511,10 @@ int rocket_job_init(struct rocket_core *core)
 	int ret;
 
 	INIT_WORK(&core->reset.work, rocket_reset_work);
+	INIT_WORK(&core->poll_work, rocket_poll_work_fn);
+	hrtimer_setup(&core->poll_timer, rocket_poll_timer_fn, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_REL);
+	atomic_set(&core->poll_active, 0);
 	spin_lock_init(&core->fence_lock);
 	mutex_init(&core->job_lock);
 
-- 
2.43.0


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Re: [RFC PATCH v3 4/6] accel/rocket: add RK3576 NPU (RKNN) support

[Igor Paunovic]

Hi Jiaxing,

You mentioned you cannot exercise RK3588, so I ran this one on mine.

Tested on RK3588 (Orange Pi 5 Plus, all three rknn cores). Applied on a
v7.0-based Rockchip tree rather than next-20260730, so it went in with
small offsets in rocket_job.c, but the RK3588 paths it touches are
identical there.

What I checked:

- all three cores probe and report their version, runtime PM suspends
  and resumes them across a 60 s inference run;
- a MobileNetV1 run through the Teflon TFLite delegate is bit-identical
  to the stock driver - five output tensors hashed every iteration,
  4260 iterations, no mismatch;
- throughput measured back to back against the unpatched module in the
  same session: 70.99 vs 71.18 inf/s, i.e. no change. (Both are above
  my usual ~68 baseline because the firmware happened to be serving
  the 200 MHz request from a different clock path that session - it is
  unrelated to your patch, which is why I measured the stock module
  again straight afterwards rather than reporting the first number.)

Tested-by: Igor Paunovic <royalnet026@gmail.com>

I also went through the RK3588 side of the soc_data conversion, since
that is the part your board cannot tell you about. All seven soc->
users keep RK3588 on its old values: num_clks 4 and num_resets 2 match
the previous ARRAY_SIZE() results, and multi_power_domain and
poll_completion are both false, so both new branches are skipped. Worth
noting for anyone reading the diff quickly: growing clks[4] to clks[6]
is exactly why num_clks had to become explicit - leaving ARRAY_SIZE()
there would have made RK3588 ask for six clocks and fail probe. The
conversion looks right to me.

I am not commenting on the RK3576-specific parts - no hardware here for
that - and I have not tested 2/6 and 3/6, since those are built in and
would need a kernel rebuild.

Thanks,
Igor

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[RFC PATCH v3 5/6] arm64: dts: rockchip: rk3576: add NPU (RKNN) nodes

[Jiaxing Hu]

Add the two RKNN cores and their IOMMUs, plus the NPU power-domain
resets the pmdomain driver now cycles on power-on. Both cores are
disabled by default; boards enable what they wire up.

Signed-off-by: Jiaxing Hu <gahing@gahingwoo.com>
---
 arch/arm64/boot/dts/rockchip/rk3576.dtsi | 78 +++++++++++++++++++++++-
 1 file changed, 76 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576.dtsi b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
index b0c0d3c8b..a9d85e672 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3576.dtsi
@@ -1070,14 +1070,22 @@ power-domain@RK3576_PD_NPUTOP {
 						power-domain@RK3576_PD_NPU0 {
 							reg = <RK3576_PD_NPU0>;
 							clocks = <&cru HCLK_RKNN_ROOT>,
-								 <&cru ACLK_RKNN0>;
+								 <&cru ACLK_RKNN0>,
+								 <&cru CLK_RKNN_DSU0>,
+								 <&cru ACLK_RKNN_CBUF>,
+								 <&cru HCLK_RKNN_CBUF>;
+							resets = <&cru SRST_A_RKNN0_BIU>;
 							pm_qos = <&qos_npu_m0>;
 							#power-domain-cells = <0>;
 						};
 						power-domain@RK3576_PD_NPU1 {
 							reg = <RK3576_PD_NPU1>;
 							clocks = <&cru HCLK_RKNN_ROOT>,
-								 <&cru ACLK_RKNN1>;
+								 <&cru ACLK_RKNN1>,
+								 <&cru CLK_RKNN_DSU0>,
+								 <&cru ACLK_RKNN_CBUF>,
+								 <&cru HCLK_RKNN_CBUF>;
+							resets = <&cru SRST_A_RKNN1_BIU>;
 							pm_qos = <&qos_npu_m1>;
 							#power-domain-cells = <0>;
 						};
@@ -1832,6 +1840,72 @@ qos_npu_m1ro: qos@27f22100 {
 			reg = <0x0 0x27f22100 0x0 0x20>;
 		};
 
+		rknn_core_0: npu@27700000 {
+			compatible = "rockchip,rk3576-rknn-core";
+			reg = <0x0 0x27700000 0x0 0x1000>,
+			      <0x0 0x27701000 0x0 0x1000>,
+			      <0x0 0x27703000 0x0 0x1000>,
+			      <0x0 0x27704000 0x0 0x1000>,
+			      <0x0 0x27705000 0x0 0x1000>;
+			reg-names = "pc", "cna", "core", "dpu", "dpu_rdma";
+			interrupts = <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cru ACLK_RKNN0>, <&cru HCLK_RKNN_ROOT>,
+				 <&cru CLK_RKNN_DSU0>, <&cru PCLK_NPUTOP_ROOT>,
+				 <&cru ACLK_RKNN_CBUF>, <&cru HCLK_RKNN_CBUF>;
+			clock-names = "aclk", "hclk", "npu", "pclk",
+				      "aclk_cbuf", "hclk_cbuf";
+			resets = <&cru SRST_A_RKNN0>;
+			reset-names = "srst_a";
+			power-domains = <&power RK3576_PD_NPU0>;
+			iommus = <&rknn_mmu_0>;
+			status = "disabled";
+		};
+
+		rknn_mmu_0: iommu@27702000 {
+			compatible = "rockchip,rk3576-iommu", "rockchip,rk3568-iommu";
+			reg = <0x0 0x27702000 0x0 0x100>,
+			      <0x0 0x27702100 0x0 0x100>;
+			interrupts = <GIC_SPI 247 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cru ACLK_RKNN0>, <&cru HCLK_RKNN_ROOT>,
+				 <&cru CLK_RKNN_DSU0>, <&cru ACLK_RKNN_CBUF>,
+				 <&cru HCLK_RKNN_CBUF>;
+			#iommu-cells = <0>;
+			power-domains = <&power RK3576_PD_NPU0>;
+			status = "disabled";
+		};
+
+		rknn_core_1: npu@27710000 {
+			compatible = "rockchip,rk3576-rknn-core";
+			reg = <0x0 0x27710000 0x0 0x1000>,
+			      <0x0 0x27711000 0x0 0x1000>,
+			      <0x0 0x27713000 0x0 0x1000>,
+			      <0x0 0x27714000 0x0 0x1000>,
+			      <0x0 0x27715000 0x0 0x1000>;
+			reg-names = "pc", "cna", "core", "dpu", "dpu_rdma";
+			interrupts = <GIC_SPI 248 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cru ACLK_RKNN1>, <&cru HCLK_RKNN_ROOT>,
+				 <&cru CLK_RKNN_DSU0>, <&cru PCLK_NPUTOP_ROOT>;
+			clock-names = "aclk", "hclk", "npu", "pclk";
+			resets = <&cru SRST_A_RKNN1>;
+			reset-names = "srst_a";
+			power-domains = <&power RK3576_PD_NPU1>;
+			iommus = <&rknn_mmu_1>;
+			status = "disabled";
+		};
+
+		rknn_mmu_1: iommu@2770a000 {
+			compatible = "rockchip,rk3576-iommu", "rockchip,rk3568-iommu";
+			reg = <0x0 0x2770a000 0x0 0x100>,
+			      <0x0 0x2770a100 0x0 0x100>;
+			interrupts = <GIC_SPI 248 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cru ACLK_RKNN1>, <&cru HCLK_RKNN_ROOT>,
+				 <&cru CLK_RKNN_DSU0>, <&cru ACLK_RKNN_CBUF>,
+				 <&cru HCLK_RKNN_CBUF>;
+			#iommu-cells = <0>;
+			power-domains = <&power RK3576_PD_NPU1>;
+			status = "disabled";
+		};
+
 		gmac0: ethernet@2a220000 {
 			compatible = "rockchip,rk3576-gmac", "snps,dwmac-4.20a";
 			reg = <0x0 0x2a220000 0x0 0x10000>;
-- 
2.43.0


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[RFC PATCH v3 6/6] arm64: dts: rockchip: rk3576-rock-4d: enable NPU

[Jiaxing Hu]

Enable rknn_core_0 and its IOMMU on the Radxa ROCK 4D and supply the
core from vdd_npu_s0. The core is listed on both NPU power domains, as
the vendor does from its single NPU node.

Signed-off-by: Jiaxing Hu <gahing@gahingwoo.com>
---
 arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
index 272af1012..09d2fc98b 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
@@ -442,6 +442,7 @@ regulator-state-mem {
 			};
 
 			vdd_npu_s0: dcdc-reg2 {
+				regulator-always-on;
 				regulator-boot-on;
 				regulator-enable-ramp-delay = <400>;
 				regulator-min-microvolt = <550000>;
@@ -869,3 +870,18 @@ vp0_out_hdmi: endpoint@ROCKCHIP_VOP2_EP_HDMI0 {
 		remote-endpoint = <&hdmi_in_vp0>;
 	};
 };
+
+&rknn_core_0 {
+	npu-supply = <&vdd_npu_s0>;
+	/*
+	 * Power BOTH NPU domains (NPU0 + NPU1) like the vendor's single NPU node,
+	 * even though rocket computes only on core 0: the CBUF->CMAC read path is
+	 * only fully powered with NPU1 up. rocket attaches the multi-PD list.
+	 */
+	power-domains = <&power RK3576_PD_NPU0>, <&power RK3576_PD_NPU1>;
+	status = "okay";
+};
+
+&rknn_mmu_0 {
+	status = "okay";
+};
-- 
2.43.0


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