[PATCH v4 0/6] rockchip: power-domain: fix pm domain for support RK3399 SoC

[PATCH v4 0/6] rockchip: power-domain: fix pm domain for support RK3399 SoC

[Elaine Zhang]

fix some idle handling
support sub-power domain
add rk3399-power.h
modify document for RK3399 Soc
modify power domain for RK3399 SoC

Elaine Zhang (6):
  rockchip: power-domain: make idle handling optional
  power-domain: allow domains only handling idle requests
  rockchip: power-domain: add support for sub-power domains
  dt/bindings: power: add RK3399 SoCs header for power-domain
  dt/bindings: rockchip: modify document of Rockchip power domains
  rockchip: power-domain: Modify power domain driver for rk3399

 .../bindings/soc/rockchip/power_domain.txt         |  41 ++++++
 drivers/soc/rockchip/pm_domains.c                  | 138 ++++++++++++++++++++-
 include/dt-bindings/power/rk3399-power.h           |  53 ++++++++
 3 files changed, 227 insertions(+), 5 deletions(-)
 create mode 100644 include/dt-bindings/power/rk3399-power.h

-- 
1.9.1

[PATCH v4 1/6] rockchip: power-domain: make idle handling optional

[Elaine Zhang]

Not all new socs need to handle idle states on domain state changes,
so add the possibility to make them optional.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 drivers/soc/rockchip/pm_domains.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index 18aee6b..c46312d 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -68,9 +68,9 @@ struct rockchip_pmu {
 {						\
 	.pwr_mask = BIT(pwr),			\
 	.status_mask = BIT(status),		\
-	.req_mask = BIT(req),			\
-	.idle_mask = BIT(idle),			\
-	.ack_mask = BIT(ack),			\
+	.req_mask = (req >= 0) ? BIT(req) : 0,		\
+	.idle_mask = (idle >= 0) ? BIT(idle) : 0,	\
+	.ack_mask = (ack >= 0) ? BIT(ack) : 0,		\
 }
 
 #define DOMAIN_RK3288(pwr, status, req)		\
@@ -96,6 +96,9 @@ static int rockchip_pmu_set_idle_request(struct rockchip_pm_domain *pd,
 	struct rockchip_pmu *pmu = pd->pmu;
 	unsigned int val;
 
+	if (pd_info->req_mask == 0)
+		return 0;
+
 	regmap_update_bits(pmu->regmap, pmu->info->req_offset,
 			   pd_info->req_mask, idle ? -1U : 0);
 
-- 
1.9.1

[PATCH v4 2/6] power-domain: allow domains only handling idle requests

[Elaine Zhang]

On some Rockchip SoC there exist child-domains only handling their
idle state with the actual power-state handled by a parent-domain.

So allow such types of domains. For them, we can determine their
state (on/of) by checking the inverse idle-state instead.

There exist one special case if both idle as well power handling
were set as not present, but as the domain-data is defined in the
code itself, we can expect the reasonable developer to define them

So allow such types of domains. For them, we can determine their
state (on/of) by checking the inverse idle-state instead.

There exist one special case if both idle as well power handling
were set as not present, but as the domain-data is defined in the
code itself, we can expect the reasonable developer to define them
in a correct, without adding more checks.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 drivers/soc/rockchip/pm_domains.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index c46312d..0465a06 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -66,8 +66,8 @@ struct rockchip_pmu {
 
 #define DOMAIN(pwr, status, req, idle, ack)	\
 {						\
-	.pwr_mask = BIT(pwr),			\
-	.status_mask = BIT(status),		\
+	.pwr_mask = (pwr >= 0) ? BIT(pwr) : 0,		\
+	.status_mask = (status >= 0) ? BIT(status) : 0,	\
 	.req_mask = (req >= 0) ? BIT(req) : 0,		\
 	.idle_mask = (idle >= 0) ? BIT(idle) : 0,	\
 	.ack_mask = (ack >= 0) ? BIT(ack) : 0,		\
@@ -119,6 +119,10 @@ static bool rockchip_pmu_domain_is_on(struct rockchip_pm_domain *pd)
 	struct rockchip_pmu *pmu = pd->pmu;
 	unsigned int val;
 
+	/* check idle status for idle-only domains */
+	if (pd->info->status_mask == 0)
+		return !rockchip_pmu_domain_is_idle(pd);
+
 	regmap_read(pmu->regmap, pmu->info->status_offset, &val);
 
 	/* 1'b0: power on, 1'b1: power off */
@@ -130,6 +134,9 @@ static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd,
 {
 	struct rockchip_pmu *pmu = pd->pmu;
 
+	if (pd->info->pwr_mask == 0)
+		return;
+
 	regmap_update_bits(pmu->regmap, pmu->info->pwr_offset,
 			   pd->info->pwr_mask, on ? 0 : -1U);
 
-- 
1.9.1

[PATCH v4 3/6] rockchip: power-domain: add support for sub-power domains

[Elaine Zhang]

This patch adds support for making one power domain a sub-domain of
other domain. This is useful for modeling power dependences,
which needs to have more than one power domain enabled to be operational.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 drivers/soc/rockchip/pm_domains.c | 63 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index 0465a06..fdb74f9 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -370,6 +370,62 @@ static void rockchip_configure_pd_cnt(struct rockchip_pmu *pmu,
 	regmap_write(pmu->regmap, domain_reg_offset + 4, count);
 }
 
+static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
+				     struct device_node *parent)
+{
+	struct device_node *np;
+	struct generic_pm_domain *child_domain, *parent_domain;
+	int error;
+
+	for_each_child_of_node(parent, np) {
+		u32 idx = ~0;
+
+		if (of_property_read_u32(parent, "reg", &idx)) {
+			dev_err(pmu->dev,
+				"%s: failed to retrieve domain id (reg)\n",
+				parent->name);
+			goto err_out;
+		}
+		parent_domain = pmu->genpd_data.domains[idx];
+
+		error = rockchip_pm_add_one_domain(pmu, np);
+		if (error) {
+			dev_err(pmu->dev, "failed to handle node %s: %d\n",
+				np->name, error);
+			goto err_out;
+		}
+
+		if (of_property_read_u32(np, "reg", &idx)) {
+			dev_err(pmu->dev,
+				"%s: failed to retrieve domain id (reg)\n",
+				np->name);
+			goto err_out;
+		}
+		child_domain = pmu->genpd_data.domains[idx];
+
+		if (pm_genpd_add_subdomain(parent_domain, child_domain)) {
+			dev_err(pmu->dev, "%s failed to add subdomain: %s\n",
+				parent_domain->name, child_domain->name);
+			goto err_out;
+		} else
+			dev_info(pmu->dev, "%s add subdomain: %s\n",
+				parent_domain->name, child_domain->name);
+
+		error = rockchip_pm_add_subdomain(pmu, np);
+		if (error < 0)
+			goto rm_sub_domain;
+	}
+	return 0;
+
+err_out:
+	of_node_put(parent);
+	of_node_put(np);
+	return -EINVAL;
+rm_sub_domain:
+	pm_genpd_remove_subdomain(parent_domain, child_domain);
+	return error;
+}
+
 static int rockchip_pm_domain_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -440,6 +496,13 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
 			of_node_put(node);
 			goto err_out;
 		}
+
+		error = rockchip_pm_add_subdomain(pmu, node);
+		if (error < 0) {
+			dev_err(dev, "failed to handle subdomain node %s: %d\n",
+				node->name, error);
+			goto err_out;
+		}
 	}
 
 	if (error) {
-- 
1.9.1

[PATCH v4 4/6] dt/bindings: power: add RK3399 SoCs header for power-domain

[Elaine Zhang]

According to a description from TRM, add all the power domains

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 include/dt-bindings/power/rk3399-power.h | 53 ++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 include/dt-bindings/power/rk3399-power.h

diff --git a/include/dt-bindings/power/rk3399-power.h b/include/dt-bindings/power/rk3399-power.h
new file mode 100644
index 0000000..69fbd67
--- /dev/null
+++ b/include/dt-bindings/power/rk3399-power.h
@@ -0,0 +1,53 @@
+#ifndef __DT_BINDINGS_POWER_RK3399_POWER_H__
+#define __DT_BINDINGS_POWER_RK3399_POWER_H__
+
+/* VD_CORE_L */
+#define RK3399_PD_A53_L0	0
+#define RK3399_PD_A53_L1	1
+#define RK3399_PD_A53_L2	2
+#define RK3399_PD_A53_L3	3
+#define RK3399_PD_SCU_L		4
+
+/* VD_CORE_B */
+#define RK3399_PD_A72_B0	5
+#define RK3399_PD_A72_B1	6
+#define RK3399_PD_SCU_B		7
+
+/* VD_CENTER */
+#define RK3399_PD_CENTER	8
+#define RK3399_PD_VCODEC	9
+#define RK3399_PD_RGA		10
+#define RK3399_PD_IEP		11
+#define RK3399_PD_VDU		12
+
+/* VD_LOGIC */
+#define RK3399_PD_PERILP	13
+#define RK3399_PD_PERIHP	14
+#define RK3399_PD_VIO		15
+#define RK3399_PD_VO		16
+#define RK3399_PD_VOPB		17
+#define RK3399_PD_VOPL		18
+#define RK3399_PD_ISP0		19
+#define RK3399_PD_ISP1		20
+#define RK3399_PD_HDCP		21
+#define RK3399_PD_TCPD0		22
+#define RK3399_PD_TCPD1		23
+#define RK3399_PD_GIC		24
+#define RK3399_PD_ALIVE		25
+#define RK3399_PD_USB3		26
+#define RK3399_PD_SD		27
+#define RK3399_PD_CCI		28
+#define RK3399_PD_CCI0		29
+#define RK3399_PD_CCI1		30
+#define RK3399_PD_GMAC		31
+#define RK3399_PD_EMMC		32
+#define RK3399_PD_EDP		33
+#define RK3399_PD_SDIOAUDIO	34
+
+/* VD_GPU */
+#define RK3399_PD_GPU		35
+
+/* VD_PMU */
+#define RK3399_PD_PMU		36
+
+#endif
-- 
1.9.1

[PATCH v4 5/6] dt/bindings: rockchip: modify document of Rockchip power domains

[Elaine Zhang]

Add binding documentation for the power domains
found on Rockchip RK3399 SoCs

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 .../bindings/soc/rockchip/power_domain.txt         | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt
index 13dc6a3..9eb43fa 100644
--- a/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt
+++ b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt
@@ -7,6 +7,7 @@ Required properties for power domain controller:
 - compatible: Should be one of the following.
 	"rockchip,rk3288-power-controller" - for RK3288 SoCs.
 	"rockchip,rk3368-power-controller" - for RK3368 SoCs.
+	"rockchip,rk3399-power-controller" - for RK3399 SoCs.
 - #power-domain-cells: Number of cells in a power-domain specifier.
 	Should be 1 for multiple PM domains.
 - #address-cells: Should be 1.
@@ -16,6 +17,7 @@ Required properties for power domain sub nodes:
 - reg: index of the power domain, should use macros in:
 	"include/dt-bindings/power/rk3288-power.h" - for RK3288 type power domain.
 	"include/dt-bindings/power/rk3368-power.h" - for RK3368 type power domain.
+	"include/dt-bindings/power/rk3399-power.h" - for RK3399 type power domain.
 - clocks (optional): phandles to clocks which need to be enabled while power domain
 	switches state.
 
@@ -45,12 +47,45 @@ Example:
                 };
         };
 
+Example 2:
+
+	power: power-controller {
+		compatible = "rockchip,rk3399-power-controller";
+		#power-domain-cells = <1>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		/*parent domain*/
+		pd_vio {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <RK3399_PD_VIO>;
+
+			/*child domain of pd_vio*/
+			pd_vo {
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <RK3399_PD_VO>;
+
+				/*child domain of pd_vo*/
+				pd_vopb {
+					reg = <RK3399_PD_VOPB>;
+				};
+
+				pd_vopl {
+					reg = <RK3399_PD_VOPL>;
+				};
+			};
+		};
+	};
+
 Node of a device using power domains must have a power-domains property,
 containing a phandle to the power device node and an index specifying which
 power domain to use.
 The index should use macros in:
 	"include/dt-bindings/power/rk3288-power.h" - for rk3288 type power domain.
 	"include/dt-bindings/power/rk3368-power.h" - for rk3368 type power domain.
+	"include/dt-bindings/power/rk3399-power.h" - for rk3399 type power domain.
 
 Example of the node using power domain:
 
@@ -65,3 +100,9 @@ Example of the node using power domain:
                 power-domains = <&power RK3368_PD_GPU_1>;
                 /* ... */
         };
+
+	node {
+		/* ... */
+		power-domains = <&power RK3399_PD_VOPB>;
+		/* ... */
+	};
-- 
1.9.1

[PATCH v4 6/6] rockchip: power-domain: Modify power domain driver for rk3399

[Elaine Zhang]

This driver is modified to support RK3399 SoC.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 drivers/soc/rockchip/pm_domains.c | 55 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/drivers/soc/rockchip/pm_domains.c b/drivers/soc/rockchip/pm_domains.c
index fdb74f9..8d23fed 100644
--- a/drivers/soc/rockchip/pm_domains.c
+++ b/drivers/soc/rockchip/pm_domains.c
@@ -19,6 +19,7 @@
 #include <linux/mfd/syscon.h>
 #include <dt-bindings/power/rk3288-power.h>
 #include <dt-bindings/power/rk3368-power.h>
+#include <dt-bindings/power/rk3399-power.h>
 
 struct rockchip_domain_info {
 	int pwr_mask;
@@ -79,6 +80,9 @@ struct rockchip_pmu {
 #define DOMAIN_RK3368(pwr, status, req)		\
 	DOMAIN(pwr, status, req, (req) + 16, req)
 
+#define DOMAIN_RK3399(pwr, status, req)                \
+	DOMAIN(pwr, status, req, req, req)
+
 static bool rockchip_pmu_domain_is_idle(struct rockchip_pm_domain *pd)
 {
 	struct rockchip_pmu *pmu = pd->pmu;
@@ -534,6 +538,36 @@ static const struct rockchip_domain_info rk3368_pm_domains[] = {
 	[RK3368_PD_GPU_1]	= DOMAIN_RK3368(17, 16, 2),
 };
 
+static const struct rockchip_domain_info rk3399_pm_domains[] = {
+	[RK3399_PD_TCPD0]	= DOMAIN_RK3399(8, 8, -1),
+	[RK3399_PD_TCPD1]	= DOMAIN_RK3399(9, 9, -1),
+	[RK3399_PD_CCI]	= DOMAIN_RK3399(10, 10, -1),
+	[RK3399_PD_CCI0]	= DOMAIN_RK3399(-1, -1, 15),
+	[RK3399_PD_CCI1]	= DOMAIN_RK3399(-1, -1, 16),
+	[RK3399_PD_PERILP]	= DOMAIN_RK3399(11, 11, 1),
+	[RK3399_PD_PERIHP]	= DOMAIN_RK3399(12, 12, 2),
+	[RK3399_PD_CENTER]	= DOMAIN_RK3399(13, 13, 14),
+	[RK3399_PD_VIO]	= DOMAIN_RK3399(14, 14, 17),
+	[RK3399_PD_GPU]	= DOMAIN_RK3399(15, 15, 0),
+	[RK3399_PD_VCODEC]	= DOMAIN_RK3399(16, 16, 3),
+	[RK3399_PD_VDU]	= DOMAIN_RK3399(17, 17, 4),
+	[RK3399_PD_RGA]	= DOMAIN_RK3399(18, 18, 5),
+	[RK3399_PD_IEP]	= DOMAIN_RK3399(19, 19, 6),
+	[RK3399_PD_VO]	= DOMAIN_RK3399(20, 20, -1),
+	[RK3399_PD_VOPB]	= DOMAIN_RK3399(-1, -1, 7),
+	[RK3399_PD_VOPL]	= DOMAIN_RK3399(-1, -1, 8),
+	[RK3399_PD_ISP0]	= DOMAIN_RK3399(22, 22, 9),
+	[RK3399_PD_ISP1]	= DOMAIN_RK3399(23, 23, 10),
+	[RK3399_PD_HDCP]	= DOMAIN_RK3399(24, 24, 11),
+	[RK3399_PD_GMAC]	= DOMAIN_RK3399(25, 25, 23),
+	[RK3399_PD_EMMC]	= DOMAIN_RK3399(26, 26, 24),
+	[RK3399_PD_USB3]	= DOMAIN_RK3399(27, 27, 12),
+	[RK3399_PD_EDP]	= DOMAIN_RK3399(28, 28, 22),
+	[RK3399_PD_GIC]	= DOMAIN_RK3399(29, 29, 27),
+	[RK3399_PD_SD]	= DOMAIN_RK3399(30, 30, 28),
+	[RK3399_PD_SDIOAUDIO]	= DOMAIN_RK3399(31, 31, 29),
+};
+
 static const struct rockchip_pmu_info rk3288_pmu = {
 	.pwr_offset = 0x08,
 	.status_offset = 0x0c,
@@ -568,6 +602,23 @@ static const struct rockchip_pmu_info rk3368_pmu = {
 	.domain_info = rk3368_pm_domains,
 };
 
+static const struct rockchip_pmu_info rk3399_pmu = {
+	.pwr_offset = 0x14,
+	.status_offset = 0x18,
+	.req_offset = 0x60,
+	.idle_offset = 0x64,
+	.ack_offset = 0x68,
+
+	.core_pwrcnt_offset = 0x9c,
+	.gpu_pwrcnt_offset = 0xa4,
+
+	.core_power_transition_time = 24,
+	.gpu_power_transition_time = 24,
+
+	.num_domains = ARRAY_SIZE(rk3399_pm_domains),
+	.domain_info = rk3399_pm_domains,
+};
+
 static const struct of_device_id rockchip_pm_domain_dt_match[] = {
 	{
 		.compatible = "rockchip,rk3288-power-controller",
@@ -577,6 +628,10 @@ static const struct of_device_id rockchip_pm_domain_dt_match[] = {
 		.compatible = "rockchip,rk3368-power-controller",
 		.data = (void *)&rk3368_pmu,
 	},
+	{
+		.compatible = "rockchip,rk3399-power-controller",
+		.data = (void *)&rk3399_pmu,
+	},
 	{ /* sentinel */ },
 };
 
-- 
1.9.1

Re: [PATCH v4 5/6] dt/bindings: rockchip: modify document of Rockchip power domains

[Kevin Hilman]

Elaine Zhang <zhangqing@rock-chips.com> writes:

> Add binding documentation for the power domains
> found on Rockchip RK3399 SoCs
>
> Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>

Acked-by: Kevin Hilman <khilman@baylibre.com>

For the general approach for adding sub-domains, but some minor nits below...

> ---
>  .../bindings/soc/rockchip/power_domain.txt         | 41 ++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt
> index 13dc6a3..9eb43fa 100644
> --- a/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt
> +++ b/Documentation/devicetree/bindings/soc/rockchip/power_domain.txt
> @@ -7,6 +7,7 @@ Required properties for power domain controller:
>  - compatible: Should be one of the following.
>  	"rockchip,rk3288-power-controller" - for RK3288 SoCs.
>  	"rockchip,rk3368-power-controller" - for RK3368 SoCs.
> +	"rockchip,rk3399-power-controller" - for RK3399 SoCs.
>  - #power-domain-cells: Number of cells in a power-domain specifier.
>  	Should be 1 for multiple PM domains.
>  - #address-cells: Should be 1.
> @@ -16,6 +17,7 @@ Required properties for power domain sub nodes:
>  - reg: index of the power domain, should use macros in:
>  	"include/dt-bindings/power/rk3288-power.h" - for RK3288 type power domain.
>  	"include/dt-bindings/power/rk3368-power.h" - for RK3368 type power domain.
> +	"include/dt-bindings/power/rk3399-power.h" - for RK3399 type power domain.
>  - clocks (optional): phandles to clocks which need to be enabled while power domain
>  	switches state.
>  
> @@ -45,12 +47,45 @@ Example:
>                  };
>          };
>  
> +Example 2:
> +
> +	power: power-controller {
> +		compatible = "rockchip,rk3399-power-controller";
> +		#power-domain-cells = <1>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		/*parent domain*/

please fix up the comment style in these examples (here and below) since they will likely
be copy/pasted into a real DT.

> +		pd_vio {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +			reg = <RK3399_PD_VIO>;
> +
> +			/*child domain of pd_vio*/
> +			pd_vo {
> +				#address-cells = <1>;
> +				#size-cells = <0>;
> +				reg = <RK3399_PD_VO>;
> +
> +				/*child domain of pd_vo*/
> +				pd_vopb {
> +					reg = <RK3399_PD_VOPB>;
> +				};
> +
> +				pd_vopl {
> +					reg = <RK3399_PD_VOPL>;
> +				};
> +			};
> +		};
> +	};
> +

Kevin