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* [PATCH V3 0/4] soc: imx: add i.MX BLK-CTL support
@ 2021-05-06  4:15 Peng Fan (OSS)
  2021-05-06  4:15 ` [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains Peng Fan (OSS)
                   ` (3 more replies)
  0 siblings, 4 replies; 12+ messages in thread
From: Peng Fan (OSS) @ 2021-05-06  4:15 UTC (permalink / raw)
  To: robh+dt, shawnguo, s.hauer
  Cc: kernel, festevam, linux-imx, p.zabel, l.stach, krzk, agx, marex,
	andrew.smirnov, devicetree, linux-arm-kernel, linux-kernel,
	ping.bai, frieder.schrempf, aford173, abel.vesa, Peng Fan

From: Peng Fan <peng.fan@nxp.com>

V3:
 Add explaination for not listing items in patch 2 commit log Per Rob.
 Addressed comments from Lucas and Frieder on patch [3,4].
 A few comments from Jacky was ignored, because following gpcv2
 coding style.

V2:
 Fix yaml check failure.

Previously there is an effort from Abel that take BLK-CTL as clock
provider, but it turns out that there is A/B lock issue and we are
not able resolve that.

Per discuss with Lucas and Jacky, we made an agreement that take BLK-CTL
as a power domain provider and use GPC's domain as parent, the consumer
node take BLK-CTL as power domain input.

This patchset has been tested on i.MX8MM EVK board, but one hack
is not included in the patchset is that the DISPMIX BLK-CTL MIPI_M/S_RESET
not implemented. Per Lucas, we will finally have a MIPI DPHY driver,
so fine to leave it.

Thanks for Lucas's suggestion, Frieder Schrempf for collecting
all the patches, Abel's previous BLK-CTL work, Jacky Bai on help
debug issues.

Peng Fan (4):
  dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains
  Documentation: bindings: clk: Add bindings for i.MX BLK_CTL
  soc: imx: Add generic blk-ctl driver
  soc: imx: Add blk-ctl driver for i.MX8MM

 .../bindings/soc/imx/fsl,imx-blk-ctl.yaml     |  66 ++++
 drivers/soc/imx/Makefile                      |   2 +-
 drivers/soc/imx/blk-ctl-imx8mm.c              | 138 ++++++++
 drivers/soc/imx/blk-ctl.c                     | 307 ++++++++++++++++++
 drivers/soc/imx/blk-ctl.h                     |  77 +++++
 include/dt-bindings/power/imx8mm-power.h      |  11 +
 6 files changed, 600 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
 create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c
 create mode 100644 drivers/soc/imx/blk-ctl.c
 create mode 100644 drivers/soc/imx/blk-ctl.h

-- 
2.30.0


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^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains
  2021-05-06  4:15 [PATCH V3 0/4] soc: imx: add i.MX BLK-CTL support Peng Fan (OSS)
@ 2021-05-06  4:15 ` Peng Fan (OSS)
  2021-05-06  7:15   ` Frieder Schrempf
  2021-05-06  7:51   ` Abel Vesa
  2021-05-06  4:15 ` [PATCH V3 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL Peng Fan (OSS)
                   ` (2 subsequent siblings)
  3 siblings, 2 replies; 12+ messages in thread
From: Peng Fan (OSS) @ 2021-05-06  4:15 UTC (permalink / raw)
  To: robh+dt, shawnguo, s.hauer
  Cc: kernel, festevam, linux-imx, p.zabel, l.stach, krzk, agx, marex,
	andrew.smirnov, devicetree, linux-arm-kernel, linux-kernel,
	ping.bai, frieder.schrempf, aford173, abel.vesa, Peng Fan

From: Peng Fan <peng.fan@nxp.com>

Adding the defines for i.MX8MM BLK-CTL power domains.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 include/dt-bindings/power/imx8mm-power.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/dt-bindings/power/imx8mm-power.h b/include/dt-bindings/power/imx8mm-power.h
index fc9c2e16aadc..510e383d1953 100644
--- a/include/dt-bindings/power/imx8mm-power.h
+++ b/include/dt-bindings/power/imx8mm-power.h
@@ -19,4 +19,15 @@
 #define IMX8MM_POWER_DOMAIN_DISPMIX	10
 #define IMX8MM_POWER_DOMAIN_MIPI	11
 
+#define IMX8MM_BLK_CTL_G2_PD		0
+#define IMX8MM_BLK_CTL_G1_PD		1
+#define IMX8MM_BLK_CTL_H1_PD		2
+#define IMX8MM_BLK_CTL_MAX_PD		3
+
+#define IMX8MM_BLK_CTL_DISPMIX_CSI_BRIDGE	0
+#define IMX8MM_BLK_CTL_DISPMIX_LCDIF		1
+#define IMX8MM_BLK_CTL_DISPMIX_MIPI_DSI		2
+#define IMX8MM_BLK_CTL_DISPMIX_MIPI_CSI		3
+#define IMX8MM_BLK_CTL_DISPMIX_MAX_PD		4
+
 #endif
-- 
2.30.0


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^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH V3 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL
  2021-05-06  4:15 [PATCH V3 0/4] soc: imx: add i.MX BLK-CTL support Peng Fan (OSS)
  2021-05-06  4:15 ` [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains Peng Fan (OSS)
@ 2021-05-06  4:15 ` Peng Fan (OSS)
  2021-05-07  1:02   ` Rob Herring
  2021-05-06  4:15 ` [PATCH V3 3/4] soc: imx: Add generic blk-ctl driver Peng Fan (OSS)
  2021-05-06  4:15 ` [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM Peng Fan (OSS)
  3 siblings, 1 reply; 12+ messages in thread
From: Peng Fan (OSS) @ 2021-05-06  4:15 UTC (permalink / raw)
  To: robh+dt, shawnguo, s.hauer
  Cc: kernel, festevam, linux-imx, p.zabel, l.stach, krzk, agx, marex,
	andrew.smirnov, devicetree, linux-arm-kernel, linux-kernel,
	ping.bai, frieder.schrempf, aford173, abel.vesa, Peng Fan

From: Peng Fan <peng.fan@nxp.com>

Document the i.MX BLK_CTL with its devicetree properties.

Each BLK CTL have different power domain inputs and they have different
names, so we are not able to list all the power domain names for each
BLK CTL here.

For example:
i.MX8MM dispmix BLK CTL, it has
	power-domains = <&pgc_dispmix>, <&pgc_mipi>;
	power-domain-names = "dispmix", "mipi";

vpumix BLK CTL, it has
	power-domains = <&vpumix_pd>, <&vpu_g1_pd>, <&vpu_g2_pd>,
			<&vpu_h1_pd>;
	power-domain-names = "vpumix", "g1", "g2", "h1";

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 .../bindings/soc/imx/fsl,imx-blk-ctl.yaml     | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml

diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
new file mode 100644
index 000000000000..a66f11acc6b4
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/imx/fsl,imx-blk-ctl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX BLK_CTL
+
+maintainers:
+  - Peng Fan <peng.fan@nxp.com>
+
+description:
+  i.MX BLK_CTL is a conglomerate of different GPRs that are
+  dedicated to a specific subsystem. It usually contains
+  clocks and resets amongst other things. Here we take the clocks
+  and resets as virtual PDs, the reason we could not take it as
+  clock provider is there is A/B lock issue between power domain
+  and clock.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - fsl,imx8mm-dispmix-blk-ctl
+          - fsl,imx8mm-vpumix-blk-ctl
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  "#power-domain-cells":
+    const: 1
+
+  power-domains:
+    minItems: 1
+    maxItems: 32
+
+  power-domain-names:
+    minItems: 1
+    maxItems: 32
+
+  clocks:
+    minItems: 1
+    maxItems: 32
+
+required:
+  - compatible
+  - reg
+  - power-domains
+  - power-domain-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mm-clock.h>
+
+    dispmix_blk_ctl: blk-ctl@32e28000 {
+      compatible = "fsl,imx8mm-dispmix-blk-ctl", "syscon";
+      reg = <0x32e28000 0x100>;
+      #power-domain-cells = <1>;
+      power-domains = <&pgc_dispmix>, <&pgc_mipi>;
+      power-domain-names = "dispmix", "mipi";
+      clocks = <&clk IMX8MM_CLK_DISP_ROOT>, <&clk IMX8MM_CLK_DISP_AXI_ROOT>,
+               <&clk IMX8MM_CLK_DISP_APB_ROOT>;
+    };
-- 
2.30.0


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^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH V3 3/4] soc: imx: Add generic blk-ctl driver
  2021-05-06  4:15 [PATCH V3 0/4] soc: imx: add i.MX BLK-CTL support Peng Fan (OSS)
  2021-05-06  4:15 ` [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains Peng Fan (OSS)
  2021-05-06  4:15 ` [PATCH V3 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL Peng Fan (OSS)
@ 2021-05-06  4:15 ` Peng Fan (OSS)
  2021-05-06  7:31   ` Frieder Schrempf
  2021-05-06  4:15 ` [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM Peng Fan (OSS)
  3 siblings, 1 reply; 12+ messages in thread
From: Peng Fan (OSS) @ 2021-05-06  4:15 UTC (permalink / raw)
  To: robh+dt, shawnguo, s.hauer
  Cc: kernel, festevam, linux-imx, p.zabel, l.stach, krzk, agx, marex,
	andrew.smirnov, devicetree, linux-arm-kernel, linux-kernel,
	ping.bai, frieder.schrempf, aford173, abel.vesa, Peng Fan

From: Peng Fan <peng.fan@nxp.com>

The i.MX8MM introduces an IP named BLK_CTL and usually is comprised of
some GPRs.

The GPRs has some clock bits and reset bits, but here we take it
as virtual PDs, because of the clock and power domain A/B lock issue
when taking it as a clock controller.

For some bits, it might be good to also make it as a reset controller,
but to i.MX8MM, we not add that support for now.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/soc/imx/Makefile  |   2 +-
 drivers/soc/imx/blk-ctl.c | 307 ++++++++++++++++++++++++++++++++++++++
 drivers/soc/imx/blk-ctl.h |  77 ++++++++++
 3 files changed, 385 insertions(+), 1 deletion(-)
 create mode 100644 drivers/soc/imx/blk-ctl.c
 create mode 100644 drivers/soc/imx/blk-ctl.h

diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index 078dc918f4f3..d3d2b49a386c 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o
 endif
 obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
 obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
-obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o
+obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o
diff --git a/drivers/soc/imx/blk-ctl.c b/drivers/soc/imx/blk-ctl.c
new file mode 100644
index 000000000000..e184d862b26b
--- /dev/null
+++ b/drivers/soc/imx/blk-ctl.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2021 NXP.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/pm_domain.h>
+#include <linux/reset-controller.h>
+
+#include "blk-ctl.h"
+
+static inline struct imx_blk_ctl_domain *to_imx_blk_ctl_pd(struct generic_pm_domain *genpd)
+{
+	return container_of(genpd, struct imx_blk_ctl_domain, pd);
+}
+
+static int imx_blk_ctl_enable_hsk(struct device *dev)
+{
+	struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev);
+	const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->hw_hsk;
+	struct regmap *regmap = blk_ctl->regmap;
+	int ret;
+
+	if (hw->flags & IMX_BLK_CTL_PD_RESET) {
+		ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, hw->rst_mask);
+		if (ret)
+			return ret;
+	}
+
+	ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask);
+
+	/* Wait for handshake */
+	udelay(5);
+
+	return ret;
+}
+
+int imx_blk_ctl_power_off(struct generic_pm_domain *domain)
+{
+	struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain);
+	struct imx_blk_ctl *blk_ctl = pd->blk_ctl;
+	struct regmap *regmap = blk_ctl->regmap;
+	const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id];
+	int ret;
+
+	mutex_lock(&blk_ctl->lock);
+
+	ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks);
+	if (ret) {
+		mutex_unlock(&blk_ctl->lock);
+		return ret;
+	}
+
+	ret = regmap_clear_bits(regmap, hw->offset, hw->mask);
+	if (ret)
+		goto hsk_fail;
+
+	if (hw->flags & IMX_BLK_CTL_PD_RESET) {
+		ret = regmap_clear_bits(regmap, hw->rst_offset, hw->rst_mask);
+		if (ret)
+			goto hsk_fail;
+	}
+
+	blk_ctl->power_count--;
+
+	if (!blk_ctl->power_count) {
+		ret = imx_blk_ctl_enable_hsk(blk_ctl->dev);
+		if (ret)
+			dev_err(blk_ctl->dev, "Hankshake failed when power off\n");
+	}
+
+hsk_fail:
+	clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks);
+
+	mutex_unlock(&blk_ctl->lock);
+
+	return ret;
+}
+
+int imx_blk_ctl_power_on(struct generic_pm_domain *domain)
+{
+	struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain);
+	struct imx_blk_ctl *blk_ctl = pd->blk_ctl;
+	struct regmap *regmap = blk_ctl->regmap;
+	const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id];
+	int ret;
+
+	mutex_lock(&blk_ctl->lock);
+
+	ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks);
+	if (ret) {
+		mutex_unlock(&blk_ctl->lock);
+		return ret;
+	}
+
+	if (!blk_ctl->power_count) {
+		ret = imx_blk_ctl_enable_hsk(blk_ctl->dev);
+		if (ret) {
+			dev_err(blk_ctl->dev, "Hankshake failed when power on\n");
+			goto disable_clk;
+		}
+	}
+
+	if (hw->flags & IMX_BLK_CTL_PD_RESET) {
+		ret = regmap_clear_bits(regmap, hw->rst_offset, hw->rst_mask);
+		if (ret)
+			goto disable_clk;
+	}
+
+	/* Wait for reset propagate */
+	udelay(5);
+
+	if (hw->flags & IMX_BLK_CTL_PD_RESET) {
+		ret = regmap_update_bits(regmap, hw->rst_offset, hw->rst_mask, hw->rst_mask);
+		if (ret)
+			goto disable_clk;
+	}
+
+	ret = regmap_update_bits(regmap, hw->offset, hw->mask, hw->mask);
+	if (ret)
+		goto disable_clk;
+
+	blk_ctl->power_count++;
+
+disable_clk:
+	clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks);
+
+	mutex_unlock(&blk_ctl->lock);
+
+	return ret;
+}
+
+static int imx_blk_ctl_attach_pd(struct device *dev, struct device **devs, char **pd_names,
+				 u32 num_pds)
+{
+	int i, ret;
+
+	if (!pd_names)
+		return -EINVAL;
+
+	if (dev->pm_domain) {
+		devs[0] = dev;
+		pm_runtime_enable(dev);
+		return 0;
+	}
+
+	for (i = 0; i < num_pds; i++) {
+		devs[i] = dev_pm_domain_attach_by_name(dev, pd_names[i]);
+		if (IS_ERR_OR_NULL(devs[i])) {
+			ret = PTR_ERR(devs[i]) ? : -ENODATA;
+			goto detach_pm;
+		}
+	}
+
+	return 0;
+
+detach_pm:
+	for (i--; i >= 0; i--)
+		dev_pm_domain_detach(devs[i], false);
+
+	return ret;
+}
+
+static int imx_blk_ctl_register_pd(struct device *dev)
+{
+	struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev);
+	const struct imx_blk_ctl_dev_data *dev_data = blk_ctl->dev_data;
+	int num = dev_data->pds_num;
+	struct imx_blk_ctl_domain *domain;
+	int i, ret;
+
+	blk_ctl->onecell_data.num_domains = num;
+	blk_ctl->onecell_data.domains = devm_kcalloc(dev, num,
+						     sizeof(struct generic_pm_domain *),
+						     GFP_KERNEL);
+
+	if (!blk_ctl->onecell_data.domains)
+		return -ENOMEM;
+
+	for (i = 0; i < num; i++) {
+		domain = devm_kzalloc(dev, sizeof(*domain), GFP_KERNEL);
+		if (!domain) {
+			ret = -ENOMEM;
+			goto remove_genpd;
+		}
+		domain->pd.name = dev_data->pds[i].name;
+		domain->pd.power_off = imx_blk_ctl_power_off;
+		domain->pd.power_on = imx_blk_ctl_power_on;
+		domain->blk_ctl = blk_ctl;
+		domain->id = i;
+
+		ret = pm_genpd_init(&domain->pd, NULL, true);
+		if (ret)
+			goto remove_genpd;
+
+		blk_ctl->onecell_data.domains[i] = &domain->pd;
+	}
+
+	return 0;
+
+remove_genpd:
+	for (i = i - 1; i >= 0; i--)
+		pm_genpd_remove(blk_ctl->onecell_data.domains[i]);
+
+	return ret;
+}
+
+static int imx_blk_ctl_hook_pd(struct device *dev)
+{
+	struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev);
+	const struct imx_blk_ctl_dev_data *dev_data = blk_ctl->dev_data;
+	const struct imx_blk_ctl_hw *pds = dev_data->pds;
+	int num_active_pd = dev_data->num_active_pd;
+	int num = dev_data->pds_num;
+	struct generic_pm_domain *genpd, *child_genpd;
+	int ret;
+	int i, j;
+
+	blk_ctl->active_pds = devm_kcalloc(dev, num_active_pd, sizeof(struct device *), GFP_KERNEL);
+	if (!blk_ctl->active_pds)
+		return -ENOMEM;
+
+	ret = imx_blk_ctl_attach_pd(dev, blk_ctl->active_pds, dev_data->active_pd_names,
+				    num_active_pd);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "Failed to attach active pd: %d\n", ret);
+		return ret;
+	}
+
+	for (i = 0; i < num; i++) {
+		for (j = 0; j < num_active_pd; j++) {
+			genpd = pd_to_genpd(blk_ctl->active_pds[j]->pm_domain);
+			if (!strcmp(genpd->name, pds[i].parent_name))
+				break;
+		}
+
+		child_genpd = blk_ctl->onecell_data.domains[i];
+		if (pm_genpd_add_subdomain(genpd, child_genpd))
+			pr_warn("failed to add subdomain: %s\n", child_genpd->name);
+	}
+
+	return 0;
+}
+
+int imx_blk_ctl_register(struct device *dev)
+{
+	struct imx_blk_ctl *blk_ctl = dev_get_drvdata(dev);
+	const struct imx_blk_ctl_dev_data *dev_data = blk_ctl->dev_data;
+	int num = dev_data->pds_num;
+	int i, ret;
+
+	if (!blk_ctl)
+		return -ENODEV;
+
+	ret = imx_blk_ctl_register_pd(dev);
+	if (ret)
+		return ret;
+
+	ret = imx_blk_ctl_hook_pd(dev);
+	if (ret)
+		goto unregister_pd;
+
+	ret = of_genpd_add_provider_onecell(dev->of_node, &blk_ctl->onecell_data);
+	if (ret)
+		goto detach_pd;
+
+	pm_runtime_get_noresume(dev);
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	pm_runtime_put(dev);
+
+	return 0;
+
+detach_pd:
+	for (i = blk_ctl->dev_data->num_active_pd; i >= 0; i--)
+		dev_pm_domain_detach(blk_ctl->active_pds[i], false);
+unregister_pd:
+	for (i = num - 1; i >= 0; i--)
+		pm_genpd_remove(blk_ctl->onecell_data.domains[i]);
+
+	if (dev->pm_domain)
+		pm_runtime_disable(dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(imx_blk_ctl_register);
+
+const struct dev_pm_ops imx_blk_ctl_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+			   pm_runtime_force_resume)
+};
+EXPORT_SYMBOL_GPL(imx_blk_ctl_pm_ops);
diff --git a/drivers/soc/imx/blk-ctl.h b/drivers/soc/imx/blk-ctl.h
new file mode 100644
index 000000000000..7a950ea9fb85
--- /dev/null
+++ b/drivers/soc/imx/blk-ctl.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __SOC_IMX_BLK_CTL_H
+#define __SOC_IMX_BLK_CTL_H
+
+enum imx_blk_ctl_pd_type {
+	BLK_CTL_PD,
+};
+
+struct imx_blk_ctl_hw {
+	int type;
+	char *name;
+	char *parent_name;
+	u32 offset;
+	u32 mask;
+	u32 flags;
+	u32 id;
+	u32 rst_offset;
+	u32 rst_mask;
+};
+
+struct imx_blk_ctl_domain {
+	struct generic_pm_domain pd;
+	struct imx_blk_ctl *blk_ctl;
+	u32 id;
+};
+
+struct imx_blk_ctl_dev_data {
+	struct regmap_config config;
+	struct imx_blk_ctl_hw *pds;
+	struct imx_blk_ctl_hw hw_hsk;
+	u32 pds_num;
+	char **active_pd_names;
+	u32 num_active_pd;
+};
+
+struct imx_blk_ctl {
+	struct device *dev;
+	struct regmap *regmap;
+	struct device **active_pds;
+	u32 pds_num;
+	u32 active_pd_count;
+	struct genpd_onecell_data onecell_data;
+	const struct imx_blk_ctl_dev_data *dev_data;
+	struct clk_bulk_data *clks;
+	u32 num_clks;
+
+	struct mutex lock;
+	int power_count;
+};
+
+#define IMX_BLK_CTL(_type, _name, _parent_name, _id, _offset, _mask, _rst_offset, _rst_mask,	\
+		    _flags)								\
+	{										\
+		.type = _type,								\
+		.name = _name,								\
+		.parent_name = _parent_name,						\
+		.id = _id,								\
+		.offset = _offset,							\
+		.mask = _mask,								\
+		.flags = _flags,							\
+		.rst_offset = _rst_offset,						\
+		.rst_mask = _rst_mask,							\
+	}
+
+#define IMX_BLK_CTL_PD(_name, _parent_name, _id, _offset, _mask, _rst_offset, _rst_mask, _flags) \
+	IMX_BLK_CTL(BLK_CTL_PD, _name, _parent_name, _id, _offset, _mask, _rst_offset,		\
+		    _rst_mask, _flags)
+
+int imx_blk_ctl_register(struct device *dev);
+
+#define IMX_BLK_CTL_PD_HANDSHAKE	BIT(0)
+#define IMX_BLK_CTL_PD_RESET		BIT(1)
+#define IMX_BLK_CTL_PD_BUS		BIT(2)
+
+const extern struct dev_pm_ops imx_blk_ctl_pm_ops;
+
+#endif
-- 
2.30.0


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^ permalink raw reply	[flat|nested] 12+ messages in thread

* [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM
  2021-05-06  4:15 [PATCH V3 0/4] soc: imx: add i.MX BLK-CTL support Peng Fan (OSS)
                   ` (2 preceding siblings ...)
  2021-05-06  4:15 ` [PATCH V3 3/4] soc: imx: Add generic blk-ctl driver Peng Fan (OSS)
@ 2021-05-06  4:15 ` Peng Fan (OSS)
  2021-05-06  7:56   ` Abel Vesa
  2021-05-07 12:53   ` Adam Ford
  3 siblings, 2 replies; 12+ messages in thread
From: Peng Fan (OSS) @ 2021-05-06  4:15 UTC (permalink / raw)
  To: robh+dt, shawnguo, s.hauer
  Cc: kernel, festevam, linux-imx, p.zabel, l.stach, krzk, agx, marex,
	andrew.smirnov, devicetree, linux-arm-kernel, linux-kernel,
	ping.bai, frieder.schrempf, aford173, abel.vesa, Peng Fan

From: Peng Fan <peng.fan@nxp.com>

The i.MX8MM SoC has dispmix BLK-CTL and vpumix BLK-CTL, so we add
that support in this driver.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/soc/imx/Makefile         |   2 +-
 drivers/soc/imx/blk-ctl-imx8mm.c | 138 +++++++++++++++++++++++++++++++
 2 files changed, 139 insertions(+), 1 deletion(-)
 create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c

diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
index d3d2b49a386c..c260b962f495 100644
--- a/drivers/soc/imx/Makefile
+++ b/drivers/soc/imx/Makefile
@@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o
 endif
 obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
 obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
-obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o
+obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o blk-ctl-imx8mm.o
diff --git a/drivers/soc/imx/blk-ctl-imx8mm.c b/drivers/soc/imx/blk-ctl-imx8mm.c
new file mode 100644
index 000000000000..cc6e6705f755
--- /dev/null
+++ b/drivers/soc/imx/blk-ctl-imx8mm.c
@@ -0,0 +1,138 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2021 NXP
+ */
+
+#include <dt-bindings/clock/imx8mm-clock.h>
+#include <dt-bindings/power/imx8mm-power.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/pm_domain.h>
+#include <linux/regmap.h>
+
+#include "blk-ctl.h"
+
+#define MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN			BIT(6)
+#define MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN			BIT(5)
+#define MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN			BIT(4)
+#define MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN			BIT(3)
+#define MEDIA_BLK_CSI_BRIDGE_SFT_EN				GENMASK(2, 0)
+
+#define MEDIA_BLK_BUS_PD_MASK					BIT(12)
+#define MEDIA_BLK_MIPI_CSI_PD_MASK				GENMASK(11, 10)
+#define MEDIA_BLK_MIPI_DSI_PD_MASK				GENMASK(9, 8)
+#define MEDIA_BLK_LCDIF_PD_MASK					GENMASK(7, 6)
+#define MEDIA_BLK_CSI_BRIDGE_PD_MASK				GENMASK(5, 0)
+
+static struct imx_blk_ctl_hw imx8mm_dispmix_blk_ctl_pds[] = {
+	IMX_BLK_CTL_PD("CSI_BRIDGE", "dispmix", IMX8MM_BLK_CTL_DISPMIX_CSI_BRIDGE, 0x4,
+		       MEDIA_BLK_CSI_BRIDGE_PD_MASK, 0, MEDIA_BLK_CSI_BRIDGE_SFT_EN,
+		       IMX_BLK_CTL_PD_RESET),
+	IMX_BLK_CTL_PD("LCDIF", "dispmix", IMX8MM_BLK_CTL_DISPMIX_LCDIF, 0x4,
+		       MEDIA_BLK_LCDIF_PD_MASK, -1, -1, 0),
+	IMX_BLK_CTL_PD("MIPI_DSI", "mipi", IMX8MM_BLK_CTL_DISPMIX_MIPI_DSI, 0x4,
+		       MEDIA_BLK_MIPI_DSI_PD_MASK, 0, MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN,
+		       IMX_BLK_CTL_PD_RESET),
+	IMX_BLK_CTL_PD("MIPI_CSI", "mipi", IMX8MM_BLK_CTL_DISPMIX_MIPI_CSI, 0x4,
+		       MEDIA_BLK_MIPI_CSI_PD_MASK, 0,
+		       MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN | MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN,
+		       IMX_BLK_CTL_PD_RESET)
+};
+
+static struct imx_blk_ctl_hw imx8mm_vpumix_blk_ctl_pds[] = {
+	IMX_BLK_CTL_PD("VPU_BLK_CTL_G2", "vpu-g2", IMX8MM_BLK_CTL_G2_PD, 0x4,
+		       BIT(0), 0, BIT(0), IMX_BLK_CTL_PD_RESET),
+	IMX_BLK_CTL_PD("VPU_BLK_CTL_G1", "vpu-g1", IMX8MM_BLK_CTL_G1_PD, 0x4,
+		       BIT(1), 0, BIT(1), IMX_BLK_CTL_PD_RESET),
+	IMX_BLK_CTL_PD("VPU_BLK_CTL_H1", "vpu-h1", IMX8MM_BLK_CTL_H1_PD, 0x4,
+		       BIT(2), 0, BIT(2), IMX_BLK_CTL_PD_HANDSHAKE | IMX_BLK_CTL_PD_RESET),
+};
+
+static const struct regmap_config imx8mm_blk_ctl_regmap_config = {
+	.reg_bits		= 32,
+	.reg_stride		= 4,
+	.val_bits		= 32,
+	.max_register		= 0x30,
+	.fast_io		= true,
+};
+
+static const struct imx_blk_ctl_dev_data imx8mm_vpumix_blk_ctl_dev_data = {
+	.pds = imx8mm_vpumix_blk_ctl_pds,
+	.pds_num = ARRAY_SIZE(imx8mm_vpumix_blk_ctl_pds),
+	.hw_hsk = IMX_BLK_CTL_PD(NULL, NULL, IMX8MM_BLK_CTL_H1_PD, 0x4, BIT(2), 0, BIT(2),
+				 IMX_BLK_CTL_PD_HANDSHAKE),
+	.config = imx8mm_blk_ctl_regmap_config,
+	.active_pd_names = (char*[]){"vpumix", "g1", "g2", "h1"},
+	.num_active_pd = 4,
+};
+
+static const struct imx_blk_ctl_dev_data imx8mm_dispmix_blk_ctl_dev_data = {
+	.pds = imx8mm_dispmix_blk_ctl_pds,
+	.pds_num = ARRAY_SIZE(imx8mm_dispmix_blk_ctl_pds),
+	.hw_hsk = IMX_BLK_CTL_PD(NULL, NULL, -1, 0x4, MEDIA_BLK_BUS_PD_MASK, 0,
+				 MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN,
+				 IMX_BLK_CTL_PD_HANDSHAKE | IMX_BLK_CTL_PD_RESET),
+	.config = imx8mm_blk_ctl_regmap_config,
+	.active_pd_names = (char*[]){"dispmix", "mipi"},
+	.num_active_pd = 2,
+};
+
+static int imx8mm_blk_ctl_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct imx_blk_ctl_dev_data *dev_data = of_device_get_match_data(dev);
+	struct regmap *regmap;
+	struct imx_blk_ctl *ctl;
+	void __iomem *base;
+
+	ctl = devm_kzalloc(dev, sizeof(*ctl), GFP_KERNEL);
+	if (!ctl)
+		return -ENOMEM;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	regmap = devm_regmap_init_mmio(dev, base, &dev_data->config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	ctl->regmap = regmap;
+	ctl->dev = dev;
+	ctl->power_count = 0;
+	mutex_init(&ctl->lock);
+
+	ctl->num_clks = devm_clk_bulk_get_all(dev, &ctl->clks);
+	if (ctl->num_clks < 0)
+		return ctl->num_clks;
+
+	dev_set_drvdata(dev, ctl);
+	ctl->dev_data = dev_data;
+
+	return imx_blk_ctl_register(dev);
+}
+
+static const struct of_device_id imx_blk_ctl_of_match[] = {
+	{ .compatible = "fsl,imx8mm-vpumix-blk-ctl", .data = &imx8mm_vpumix_blk_ctl_dev_data },
+	{ .compatible = "fsl,imx8mm-dispmix-blk-ctl", .data = &imx8mm_dispmix_blk_ctl_dev_data },
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, imx_blk_ctl_of_match);
+
+static struct platform_driver imx_blk_ctl_driver = {
+	.probe = imx8mm_blk_ctl_probe,
+	.driver = {
+		.name = "imx8mm-blk-ctl",
+		.of_match_table = of_match_ptr(imx_blk_ctl_of_match),
+		.pm = &imx_blk_ctl_pm_ops,
+	},
+};
+module_platform_driver(imx_blk_ctl_driver);
-- 
2.30.0


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains
  2021-05-06  4:15 ` [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains Peng Fan (OSS)
@ 2021-05-06  7:15   ` Frieder Schrempf
  2021-05-06  7:51   ` Abel Vesa
  1 sibling, 0 replies; 12+ messages in thread
From: Frieder Schrempf @ 2021-05-06  7:15 UTC (permalink / raw)
  To: Peng Fan (OSS), robh+dt, shawnguo, s.hauer
  Cc: kernel, festevam, linux-imx, p.zabel, l.stach, krzk, agx, marex,
	andrew.smirnov, devicetree, linux-arm-kernel, linux-kernel,
	ping.bai, aford173, abel.vesa, Peng Fan

On 06.05.21 06:15, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Adding the defines for i.MX8MM BLK-CTL power domains.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  include/dt-bindings/power/imx8mm-power.h | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/include/dt-bindings/power/imx8mm-power.h b/include/dt-bindings/power/imx8mm-power.h
> index fc9c2e16aadc..510e383d1953 100644
> --- a/include/dt-bindings/power/imx8mm-power.h
> +++ b/include/dt-bindings/power/imx8mm-power.h
> @@ -19,4 +19,15 @@
>  #define IMX8MM_POWER_DOMAIN_DISPMIX	10
>  #define IMX8MM_POWER_DOMAIN_MIPI	11
>  
> +#define IMX8MM_BLK_CTL_G2_PD		0
> +#define IMX8MM_BLK_CTL_G1_PD		1
> +#define IMX8MM_BLK_CTL_H1_PD		2
> +#define IMX8MM_BLK_CTL_MAX_PD		3

I think it would be good to have "VPU" somewhere in these defines. Like IMX8MM_BLK_CTL_VPU_*. And here you have the *_PD suffix, but for dispmix below you don't have it. I think you should either remove the suffix here, or add it below, while I would go for the former.

> +
> +#define IMX8MM_BLK_CTL_DISPMIX_CSI_BRIDGE	0
> +#define IMX8MM_BLK_CTL_DISPMIX_LCDIF		1
> +#define IMX8MM_BLK_CTL_DISPMIX_MIPI_DSI		2
> +#define IMX8MM_BLK_CTL_DISPMIX_MIPI_CSI		3
> +#define IMX8MM_BLK_CTL_DISPMIX_MAX_PD		4
> +
>  #endif
> 

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^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH V3 3/4] soc: imx: Add generic blk-ctl driver
  2021-05-06  4:15 ` [PATCH V3 3/4] soc: imx: Add generic blk-ctl driver Peng Fan (OSS)
@ 2021-05-06  7:31   ` Frieder Schrempf
  0 siblings, 0 replies; 12+ messages in thread
From: Frieder Schrempf @ 2021-05-06  7:31 UTC (permalink / raw)
  To: Peng Fan (OSS), robh+dt, shawnguo, s.hauer
  Cc: kernel, festevam, linux-imx, p.zabel, l.stach, krzk, agx, marex,
	andrew.smirnov, devicetree, linux-arm-kernel, linux-kernel,
	ping.bai, aford173, abel.vesa, Peng Fan

On 06.05.21 06:15, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> The i.MX8MM introduces an IP named BLK_CTL and usually is comprised of
> some GPRs.
> 
> The GPRs has some clock bits and reset bits, but here we take it
> as virtual PDs, because of the clock and power domain A/B lock issue
> when taking it as a clock controller.
> 
> For some bits, it might be good to also make it as a reset controller,
> but to i.MX8MM, we not add that support for now.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/soc/imx/Makefile  |   2 +-
>  drivers/soc/imx/blk-ctl.c | 307 ++++++++++++++++++++++++++++++++++++++
>  drivers/soc/imx/blk-ctl.h |  77 ++++++++++
>  3 files changed, 385 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/soc/imx/blk-ctl.c
>  create mode 100644 drivers/soc/imx/blk-ctl.h
> 
> diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
> index 078dc918f4f3..d3d2b49a386c 100644
> --- a/drivers/soc/imx/Makefile
> +++ b/drivers/soc/imx/Makefile
> @@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o
>  endif
>  obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
>  obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
> -obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o
> +obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o
> diff --git a/drivers/soc/imx/blk-ctl.c b/drivers/soc/imx/blk-ctl.c
> new file mode 100644
> index 000000000000..e184d862b26b
> --- /dev/null
> +++ b/drivers/soc/imx/blk-ctl.c
> @@ -0,0 +1,307 @@
[...]
> +
> +	blk_ctl->power_count--;
> +
> +	if (!blk_ctl->power_count) {
> +		ret = imx_blk_ctl_enable_hsk(blk_ctl->dev);
> +		if (ret)
> +			dev_err(blk_ctl->dev, "Hankshake failed when power off\n");

You still have a 'k' instead of a 'd' in "Handshake"!

> +	}
> +
> +hsk_fail:
> +	clk_bulk_disable_unprepare(blk_ctl->num_clks, blk_ctl->clks);
> +
> +	mutex_unlock(&blk_ctl->lock);
> +
> +	return ret;
> +}
> +
> +int imx_blk_ctl_power_on(struct generic_pm_domain *domain)
> +{
> +	struct imx_blk_ctl_domain *pd = to_imx_blk_ctl_pd(domain);
> +	struct imx_blk_ctl *blk_ctl = pd->blk_ctl;
> +	struct regmap *regmap = blk_ctl->regmap;
> +	const struct imx_blk_ctl_hw *hw = &blk_ctl->dev_data->pds[pd->id];
> +	int ret;
> +
> +	mutex_lock(&blk_ctl->lock);
> +
> +	ret = clk_bulk_prepare_enable(blk_ctl->num_clks, blk_ctl->clks);
> +	if (ret) {
> +		mutex_unlock(&blk_ctl->lock);
> +		return ret;
> +	}
> +
> +	if (!blk_ctl->power_count) {
> +		ret = imx_blk_ctl_enable_hsk(blk_ctl->dev);
> +		if (ret) {
> +			dev_err(blk_ctl->dev, "Hankshake failed when power on\n");

You still have a 'k' instead of a 'd' in "Handshake"!

> +			goto disable_clk;
> +		}
> +	}
> +
[...]

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^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains
  2021-05-06  4:15 ` [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains Peng Fan (OSS)
  2021-05-06  7:15   ` Frieder Schrempf
@ 2021-05-06  7:51   ` Abel Vesa
  1 sibling, 0 replies; 12+ messages in thread
From: Abel Vesa @ 2021-05-06  7:51 UTC (permalink / raw)
  To: Peng Fan (OSS)
  Cc: robh+dt, shawnguo, s.hauer, kernel, festevam, linux-imx, p.zabel,
	l.stach, krzk, agx, marex, andrew.smirnov, devicetree,
	linux-arm-kernel, linux-kernel, ping.bai, frieder.schrempf,
	aford173, Peng Fan

On 21-05-06 12:15:52, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Adding the defines for i.MX8MM BLK-CTL power domains.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  include/dt-bindings/power/imx8mm-power.h | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/include/dt-bindings/power/imx8mm-power.h b/include/dt-bindings/power/imx8mm-power.h
> index fc9c2e16aadc..510e383d1953 100644
> --- a/include/dt-bindings/power/imx8mm-power.h
> +++ b/include/dt-bindings/power/imx8mm-power.h
> @@ -19,4 +19,15 @@
>  #define IMX8MM_POWER_DOMAIN_DISPMIX	10
>  #define IMX8MM_POWER_DOMAIN_MIPI	11
>  
> +#define IMX8MM_BLK_CTL_G2_PD		0
> +#define IMX8MM_BLK_CTL_G1_PD		1
> +#define IMX8MM_BLK_CTL_H1_PD		2
> +#define IMX8MM_BLK_CTL_MAX_PD		3

Put the PD before the G2, like so:

IMX8MM_BLK_CTL_PD_G2

Same for the other ones.

> +
> +#define IMX8MM_BLK_CTL_DISPMIX_CSI_BRIDGE	0
> +#define IMX8MM_BLK_CTL_DISPMIX_LCDIF		1
> +#define IMX8MM_BLK_CTL_DISPMIX_MIPI_DSI		2
> +#define IMX8MM_BLK_CTL_DISPMIX_MIPI_CSI		3
> +#define IMX8MM_BLK_CTL_DISPMIX_MAX_PD		4
> +
>  #endif
> -- 
> 2.30.0
> 

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^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM
  2021-05-06  4:15 ` [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM Peng Fan (OSS)
@ 2021-05-06  7:56   ` Abel Vesa
  2021-05-07 12:53   ` Adam Ford
  1 sibling, 0 replies; 12+ messages in thread
From: Abel Vesa @ 2021-05-06  7:56 UTC (permalink / raw)
  To: Peng Fan (OSS)
  Cc: robh+dt, shawnguo, s.hauer, kernel, festevam, linux-imx, p.zabel,
	l.stach, krzk, agx, marex, andrew.smirnov, devicetree,
	linux-arm-kernel, linux-kernel, ping.bai, frieder.schrempf,
	aford173, Peng Fan

On 21-05-06 12:15:55, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> The i.MX8MM SoC has dispmix BLK-CTL and vpumix BLK-CTL, so we add
> that support in this driver.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>

I'm fine with this.

Reviewed-by: Abel Vesa <abel.vesa@nxp.com>

> ---
>  drivers/soc/imx/Makefile         |   2 +-
>  drivers/soc/imx/blk-ctl-imx8mm.c | 138 +++++++++++++++++++++++++++++++
>  2 files changed, 139 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c
> 
> diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
> index d3d2b49a386c..c260b962f495 100644
> --- a/drivers/soc/imx/Makefile
> +++ b/drivers/soc/imx/Makefile
> @@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o
>  endif
>  obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
>  obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
> -obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o
> +obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o blk-ctl-imx8mm.o
> diff --git a/drivers/soc/imx/blk-ctl-imx8mm.c b/drivers/soc/imx/blk-ctl-imx8mm.c
> new file mode 100644
> index 000000000000..cc6e6705f755
> --- /dev/null
> +++ b/drivers/soc/imx/blk-ctl-imx8mm.c
> @@ -0,0 +1,138 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2021 NXP
> + */
> +
> +#include <dt-bindings/clock/imx8mm-clock.h>
> +#include <dt-bindings/power/imx8mm-power.h>
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/of_address.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/pm_domain.h>
> +#include <linux/regmap.h>
> +
> +#include "blk-ctl.h"
> +
> +#define MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN			BIT(6)
> +#define MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN			BIT(5)
> +#define MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN			BIT(4)
> +#define MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN			BIT(3)
> +#define MEDIA_BLK_CSI_BRIDGE_SFT_EN				GENMASK(2, 0)
> +
> +#define MEDIA_BLK_BUS_PD_MASK					BIT(12)
> +#define MEDIA_BLK_MIPI_CSI_PD_MASK				GENMASK(11, 10)
> +#define MEDIA_BLK_MIPI_DSI_PD_MASK				GENMASK(9, 8)
> +#define MEDIA_BLK_LCDIF_PD_MASK					GENMASK(7, 6)
> +#define MEDIA_BLK_CSI_BRIDGE_PD_MASK				GENMASK(5, 0)
> +
> +static struct imx_blk_ctl_hw imx8mm_dispmix_blk_ctl_pds[] = {
> +	IMX_BLK_CTL_PD("CSI_BRIDGE", "dispmix", IMX8MM_BLK_CTL_DISPMIX_CSI_BRIDGE, 0x4,
> +		       MEDIA_BLK_CSI_BRIDGE_PD_MASK, 0, MEDIA_BLK_CSI_BRIDGE_SFT_EN,
> +		       IMX_BLK_CTL_PD_RESET),
> +	IMX_BLK_CTL_PD("LCDIF", "dispmix", IMX8MM_BLK_CTL_DISPMIX_LCDIF, 0x4,
> +		       MEDIA_BLK_LCDIF_PD_MASK, -1, -1, 0),
> +	IMX_BLK_CTL_PD("MIPI_DSI", "mipi", IMX8MM_BLK_CTL_DISPMIX_MIPI_DSI, 0x4,
> +		       MEDIA_BLK_MIPI_DSI_PD_MASK, 0, MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN,
> +		       IMX_BLK_CTL_PD_RESET),
> +	IMX_BLK_CTL_PD("MIPI_CSI", "mipi", IMX8MM_BLK_CTL_DISPMIX_MIPI_CSI, 0x4,
> +		       MEDIA_BLK_MIPI_CSI_PD_MASK, 0,
> +		       MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN | MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN,
> +		       IMX_BLK_CTL_PD_RESET)
> +};
> +
> +static struct imx_blk_ctl_hw imx8mm_vpumix_blk_ctl_pds[] = {
> +	IMX_BLK_CTL_PD("VPU_BLK_CTL_G2", "vpu-g2", IMX8MM_BLK_CTL_G2_PD, 0x4,
> +		       BIT(0), 0, BIT(0), IMX_BLK_CTL_PD_RESET),
> +	IMX_BLK_CTL_PD("VPU_BLK_CTL_G1", "vpu-g1", IMX8MM_BLK_CTL_G1_PD, 0x4,
> +		       BIT(1), 0, BIT(1), IMX_BLK_CTL_PD_RESET),
> +	IMX_BLK_CTL_PD("VPU_BLK_CTL_H1", "vpu-h1", IMX8MM_BLK_CTL_H1_PD, 0x4,
> +		       BIT(2), 0, BIT(2), IMX_BLK_CTL_PD_HANDSHAKE | IMX_BLK_CTL_PD_RESET),
> +};
> +
> +static const struct regmap_config imx8mm_blk_ctl_regmap_config = {
> +	.reg_bits		= 32,
> +	.reg_stride		= 4,
> +	.val_bits		= 32,
> +	.max_register		= 0x30,
> +	.fast_io		= true,
> +};
> +
> +static const struct imx_blk_ctl_dev_data imx8mm_vpumix_blk_ctl_dev_data = {
> +	.pds = imx8mm_vpumix_blk_ctl_pds,
> +	.pds_num = ARRAY_SIZE(imx8mm_vpumix_blk_ctl_pds),
> +	.hw_hsk = IMX_BLK_CTL_PD(NULL, NULL, IMX8MM_BLK_CTL_H1_PD, 0x4, BIT(2), 0, BIT(2),
> +				 IMX_BLK_CTL_PD_HANDSHAKE),
> +	.config = imx8mm_blk_ctl_regmap_config,
> +	.active_pd_names = (char*[]){"vpumix", "g1", "g2", "h1"},
> +	.num_active_pd = 4,
> +};
> +
> +static const struct imx_blk_ctl_dev_data imx8mm_dispmix_blk_ctl_dev_data = {
> +	.pds = imx8mm_dispmix_blk_ctl_pds,
> +	.pds_num = ARRAY_SIZE(imx8mm_dispmix_blk_ctl_pds),
> +	.hw_hsk = IMX_BLK_CTL_PD(NULL, NULL, -1, 0x4, MEDIA_BLK_BUS_PD_MASK, 0,
> +				 MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN,
> +				 IMX_BLK_CTL_PD_HANDSHAKE | IMX_BLK_CTL_PD_RESET),
> +	.config = imx8mm_blk_ctl_regmap_config,
> +	.active_pd_names = (char*[]){"dispmix", "mipi"},
> +	.num_active_pd = 2,
> +};
> +
> +static int imx8mm_blk_ctl_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	const struct imx_blk_ctl_dev_data *dev_data = of_device_get_match_data(dev);
> +	struct regmap *regmap;
> +	struct imx_blk_ctl *ctl;
> +	void __iomem *base;
> +
> +	ctl = devm_kzalloc(dev, sizeof(*ctl), GFP_KERNEL);
> +	if (!ctl)
> +		return -ENOMEM;
> +
> +	base = devm_platform_ioremap_resource(pdev, 0);
> +	if (IS_ERR(base))
> +		return PTR_ERR(base);
> +
> +	regmap = devm_regmap_init_mmio(dev, base, &dev_data->config);
> +	if (IS_ERR(regmap))
> +		return PTR_ERR(regmap);
> +
> +	ctl->regmap = regmap;
> +	ctl->dev = dev;
> +	ctl->power_count = 0;
> +	mutex_init(&ctl->lock);
> +
> +	ctl->num_clks = devm_clk_bulk_get_all(dev, &ctl->clks);
> +	if (ctl->num_clks < 0)
> +		return ctl->num_clks;
> +
> +	dev_set_drvdata(dev, ctl);
> +	ctl->dev_data = dev_data;
> +
> +	return imx_blk_ctl_register(dev);
> +}
> +
> +static const struct of_device_id imx_blk_ctl_of_match[] = {
> +	{ .compatible = "fsl,imx8mm-vpumix-blk-ctl", .data = &imx8mm_vpumix_blk_ctl_dev_data },
> +	{ .compatible = "fsl,imx8mm-dispmix-blk-ctl", .data = &imx8mm_dispmix_blk_ctl_dev_data },
> +	{ /* Sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, imx_blk_ctl_of_match);
> +
> +static struct platform_driver imx_blk_ctl_driver = {
> +	.probe = imx8mm_blk_ctl_probe,
> +	.driver = {
> +		.name = "imx8mm-blk-ctl",
> +		.of_match_table = of_match_ptr(imx_blk_ctl_of_match),
> +		.pm = &imx_blk_ctl_pm_ops,
> +	},
> +};
> +module_platform_driver(imx_blk_ctl_driver);
> -- 
> 2.30.0
> 

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^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH V3 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL
  2021-05-06  4:15 ` [PATCH V3 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL Peng Fan (OSS)
@ 2021-05-07  1:02   ` Rob Herring
  0 siblings, 0 replies; 12+ messages in thread
From: Rob Herring @ 2021-05-07  1:02 UTC (permalink / raw)
  To: Peng Fan (OSS)
  Cc: l.stach, Peng Fan, linux-kernel, devicetree, andrew.smirnov,
	abel.vesa, shawnguo, s.hauer, linux-arm-kernel, krzk, aford173,
	robh+dt, p.zabel, frieder.schrempf, ping.bai, linux-imx, agx,
	kernel, marex, festevam

On Thu, 06 May 2021 12:15:53 +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Document the i.MX BLK_CTL with its devicetree properties.
> 
> Each BLK CTL have different power domain inputs and they have different
> names, so we are not able to list all the power domain names for each
> BLK CTL here.
> 
> For example:
> i.MX8MM dispmix BLK CTL, it has
> 	power-domains = <&pgc_dispmix>, <&pgc_mipi>;
> 	power-domain-names = "dispmix", "mipi";
> 
> vpumix BLK CTL, it has
> 	power-domains = <&vpumix_pd>, <&vpu_g1_pd>, <&vpu_g2_pd>,
> 			<&vpu_h1_pd>;
> 	power-domain-names = "vpumix", "g1", "g2", "h1";
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  .../bindings/soc/imx/fsl,imx-blk-ctl.yaml     | 66 +++++++++++++++++++
>  1 file changed, 66 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx-blk-ctl.yaml
> 

Reviewed-by: Rob Herring <robh@kernel.org>

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^ permalink raw reply	[flat|nested] 12+ messages in thread

* Re: [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM
  2021-05-06  4:15 ` [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM Peng Fan (OSS)
  2021-05-06  7:56   ` Abel Vesa
@ 2021-05-07 12:53   ` Adam Ford
  2021-05-08  0:54     ` Peng Fan
  1 sibling, 1 reply; 12+ messages in thread
From: Adam Ford @ 2021-05-07 12:53 UTC (permalink / raw)
  To: Peng Fan (OSS)
  Cc: Rob Herring, Shawn Guo, Sascha Hauer, Sascha Hauer,
	Fabio Estevam, NXP Linux Team, Philipp Zabel, Lucas Stach,
	Krzysztof Kozlowski, Guido Günther, Marek Vasut,
	Andrey Smirnov, devicetree, arm-soc, Linux Kernel Mailing List,
	Jacky Bai, Schrempf Frieder, Abel Vesa, Peng Fan

On Wed, May 5, 2021 at 10:44 PM Peng Fan (OSS) <peng.fan@oss.nxp.com> wrote:
>
> From: Peng Fan <peng.fan@nxp.com>
>
> The i.MX8MM SoC has dispmix BLK-CTL and vpumix BLK-CTL, so we add
> that support in this driver.
>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/soc/imx/Makefile         |   2 +-
>  drivers/soc/imx/blk-ctl-imx8mm.c | 138 +++++++++++++++++++++++++++++++
>  2 files changed, 139 insertions(+), 1 deletion(-)
>  create mode 100644 drivers/soc/imx/blk-ctl-imx8mm.c
>
> diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile
> index d3d2b49a386c..c260b962f495 100644
> --- a/drivers/soc/imx/Makefile
> +++ b/drivers/soc/imx/Makefile
> @@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o
>  endif
>  obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
>  obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
> -obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o
> +obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o blk-ctl-imx8mm.o
> diff --git a/drivers/soc/imx/blk-ctl-imx8mm.c b/drivers/soc/imx/blk-ctl-imx8mm.c
> new file mode 100644
> index 000000000000..cc6e6705f755
> --- /dev/null
> +++ b/drivers/soc/imx/blk-ctl-imx8mm.c
> @@ -0,0 +1,138 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright 2021 NXP
> + */
> +
> +#include <dt-bindings/clock/imx8mm-clock.h>
> +#include <dt-bindings/power/imx8mm-power.h>
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/of_address.h>
> +#include <linux/of_device.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +#include <linux/types.h>
> +#include <linux/pm_domain.h>
> +#include <linux/regmap.h>
> +
> +#include "blk-ctl.h"
> +
> +#define MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN                     BIT(6)
> +#define MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN                    BIT(5)
> +#define MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN                    BIT(4)
> +#define MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN                  BIT(3)
> +#define MEDIA_BLK_CSI_BRIDGE_SFT_EN                            GENMASK(2, 0)
> +
> +#define MEDIA_BLK_BUS_PD_MASK                                  BIT(12)
> +#define MEDIA_BLK_MIPI_CSI_PD_MASK                             GENMASK(11, 10)
> +#define MEDIA_BLK_MIPI_DSI_PD_MASK                             GENMASK(9, 8)
> +#define MEDIA_BLK_LCDIF_PD_MASK                                        GENMASK(7, 6)
> +#define MEDIA_BLK_CSI_BRIDGE_PD_MASK                           GENMASK(5, 0)
> +
> +static struct imx_blk_ctl_hw imx8mm_dispmix_blk_ctl_pds[] = {
> +       IMX_BLK_CTL_PD("CSI_BRIDGE", "dispmix", IMX8MM_BLK_CTL_DISPMIX_CSI_BRIDGE, 0x4,
> +                      MEDIA_BLK_CSI_BRIDGE_PD_MASK, 0, MEDIA_BLK_CSI_BRIDGE_SFT_EN,
> +                      IMX_BLK_CTL_PD_RESET),
> +       IMX_BLK_CTL_PD("LCDIF", "dispmix", IMX8MM_BLK_CTL_DISPMIX_LCDIF, 0x4,
> +                      MEDIA_BLK_LCDIF_PD_MASK, -1, -1, 0),
> +       IMX_BLK_CTL_PD("MIPI_DSI", "mipi", IMX8MM_BLK_CTL_DISPMIX_MIPI_DSI, 0x4,
> +                      MEDIA_BLK_MIPI_DSI_PD_MASK, 0, MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN,
> +                      IMX_BLK_CTL_PD_RESET),
> +       IMX_BLK_CTL_PD("MIPI_CSI", "mipi", IMX8MM_BLK_CTL_DISPMIX_MIPI_CSI, 0x4,
> +                      MEDIA_BLK_MIPI_CSI_PD_MASK, 0,
> +                      MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN | MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN,
> +                      IMX_BLK_CTL_PD_RESET)
> +};
> +
> +static struct imx_blk_ctl_hw imx8mm_vpumix_blk_ctl_pds[] = {
> +       IMX_BLK_CTL_PD("VPU_BLK_CTL_G2", "vpu-g2", IMX8MM_BLK_CTL_G2_PD, 0x4,
> +                      BIT(0), 0, BIT(0), IMX_BLK_CTL_PD_RESET),
> +       IMX_BLK_CTL_PD("VPU_BLK_CTL_G1", "vpu-g1", IMX8MM_BLK_CTL_G1_PD, 0x4,
> +                      BIT(1), 0, BIT(1), IMX_BLK_CTL_PD_RESET),
> +       IMX_BLK_CTL_PD("VPU_BLK_CTL_H1", "vpu-h1", IMX8MM_BLK_CTL_H1_PD, 0x4,
> +                      BIT(2), 0, BIT(2), IMX_BLK_CTL_PD_HANDSHAKE | IMX_BLK_CTL_PD_RESET),

Question for you or the group,

I am trying to port this code to the Nano.  I have the various virtual
domains for ISI, CSI, DSI, LCDIF, etc. but the system doesn't wake
from sleep.  I notice that the IMX_BLK_CTL_PD_HANDSHAKE is only used
occasionally, and I was hoping someone could help me identify when
it's needed.  I know the Nano doesn't have the VPU, but I want to make
sure I'm not missing a IMX_BLK_CTL_PD_HANDSHAKE if necessary.

I could also post an RFC to get feedback if that helps.

adam

> +};
> +
> +static const struct regmap_config imx8mm_blk_ctl_regmap_config = {
> +       .reg_bits               = 32,
> +       .reg_stride             = 4,
> +       .val_bits               = 32,
> +       .max_register           = 0x30,
> +       .fast_io                = true,
> +};
> +
> +static const struct imx_blk_ctl_dev_data imx8mm_vpumix_blk_ctl_dev_data = {
> +       .pds = imx8mm_vpumix_blk_ctl_pds,
> +       .pds_num = ARRAY_SIZE(imx8mm_vpumix_blk_ctl_pds),
> +       .hw_hsk = IMX_BLK_CTL_PD(NULL, NULL, IMX8MM_BLK_CTL_H1_PD, 0x4, BIT(2), 0, BIT(2),
> +                                IMX_BLK_CTL_PD_HANDSHAKE),
> +       .config = imx8mm_blk_ctl_regmap_config,
> +       .active_pd_names = (char*[]){"vpumix", "g1", "g2", "h1"},
> +       .num_active_pd = 4,
> +};
> +
> +static const struct imx_blk_ctl_dev_data imx8mm_dispmix_blk_ctl_dev_data = {
> +       .pds = imx8mm_dispmix_blk_ctl_pds,
> +       .pds_num = ARRAY_SIZE(imx8mm_dispmix_blk_ctl_pds),
> +       .hw_hsk = IMX_BLK_CTL_PD(NULL, NULL, -1, 0x4, MEDIA_BLK_BUS_PD_MASK, 0,
> +                                MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN,
> +                                IMX_BLK_CTL_PD_HANDSHAKE | IMX_BLK_CTL_PD_RESET),
> +       .config = imx8mm_blk_ctl_regmap_config,
> +       .active_pd_names = (char*[]){"dispmix", "mipi"},
> +       .num_active_pd = 2,
> +};
> +
> +static int imx8mm_blk_ctl_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       const struct imx_blk_ctl_dev_data *dev_data = of_device_get_match_data(dev);
> +       struct regmap *regmap;
> +       struct imx_blk_ctl *ctl;
> +       void __iomem *base;
> +
> +       ctl = devm_kzalloc(dev, sizeof(*ctl), GFP_KERNEL);
> +       if (!ctl)
> +               return -ENOMEM;
> +
> +       base = devm_platform_ioremap_resource(pdev, 0);
> +       if (IS_ERR(base))
> +               return PTR_ERR(base);
> +
> +       regmap = devm_regmap_init_mmio(dev, base, &dev_data->config);
> +       if (IS_ERR(regmap))
> +               return PTR_ERR(regmap);
> +
> +       ctl->regmap = regmap;
> +       ctl->dev = dev;
> +       ctl->power_count = 0;
> +       mutex_init(&ctl->lock);
> +
> +       ctl->num_clks = devm_clk_bulk_get_all(dev, &ctl->clks);
> +       if (ctl->num_clks < 0)
> +               return ctl->num_clks;
> +
> +       dev_set_drvdata(dev, ctl);
> +       ctl->dev_data = dev_data;
> +
> +       return imx_blk_ctl_register(dev);
> +}
> +
> +static const struct of_device_id imx_blk_ctl_of_match[] = {
> +       { .compatible = "fsl,imx8mm-vpumix-blk-ctl", .data = &imx8mm_vpumix_blk_ctl_dev_data },
> +       { .compatible = "fsl,imx8mm-dispmix-blk-ctl", .data = &imx8mm_dispmix_blk_ctl_dev_data },
> +       { /* Sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, imx_blk_ctl_of_match);
> +
> +static struct platform_driver imx_blk_ctl_driver = {
> +       .probe = imx8mm_blk_ctl_probe,
> +       .driver = {
> +               .name = "imx8mm-blk-ctl",
> +               .of_match_table = of_match_ptr(imx_blk_ctl_of_match),
> +               .pm = &imx_blk_ctl_pm_ops,
> +       },
> +};
> +module_platform_driver(imx_blk_ctl_driver);
> --
> 2.30.0
>

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^ permalink raw reply	[flat|nested] 12+ messages in thread

* RE: [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM
  2021-05-07 12:53   ` Adam Ford
@ 2021-05-08  0:54     ` Peng Fan
  0 siblings, 0 replies; 12+ messages in thread
From: Peng Fan @ 2021-05-08  0:54 UTC (permalink / raw)
  To: Adam Ford, Peng Fan (OSS)
  Cc: Rob Herring, Shawn Guo, Sascha Hauer, Sascha Hauer,
	Fabio Estevam, dl-linux-imx, Philipp Zabel, Lucas Stach,
	Krzysztof Kozlowski, Guido Günther, Marek Vasut,
	Andrey Smirnov, devicetree, arm-soc, Linux Kernel Mailing List,
	Jacky Bai, Schrempf Frieder, Abel Vesa

> Subject: Re: [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM
> 
> On Wed, May 5, 2021 at 10:44 PM Peng Fan (OSS) <peng.fan@oss.nxp.com>
> wrote:
> >
> > From: Peng Fan <peng.fan@nxp.com>
> >
> > The i.MX8MM SoC has dispmix BLK-CTL and vpumix BLK-CTL, so we add
> that
> > support in this driver.
> >
> > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > ---
> >  drivers/soc/imx/Makefile         |   2 +-
> >  drivers/soc/imx/blk-ctl-imx8mm.c | 138
> > +++++++++++++++++++++++++++++++
> >  2 files changed, 139 insertions(+), 1 deletion(-)  create mode 100644
> > drivers/soc/imx/blk-ctl-imx8mm.c
> >
> > diff --git a/drivers/soc/imx/Makefile b/drivers/soc/imx/Makefile index
> > d3d2b49a386c..c260b962f495 100644
> > --- a/drivers/soc/imx/Makefile
> > +++ b/drivers/soc/imx/Makefile
> > @@ -4,4 +4,4 @@ obj-$(CONFIG_ARCH_MXC) += soc-imx.o  endif
> >  obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
> >  obj-$(CONFIG_IMX_GPCV2_PM_DOMAINS) += gpcv2.o
> > -obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o
> > +obj-$(CONFIG_SOC_IMX8M) += soc-imx8m.o blk-ctl.o blk-ctl-imx8mm.o
> > diff --git a/drivers/soc/imx/blk-ctl-imx8mm.c
> > b/drivers/soc/imx/blk-ctl-imx8mm.c
> > new file mode 100644
> > index 000000000000..cc6e6705f755
> > --- /dev/null
> > +++ b/drivers/soc/imx/blk-ctl-imx8mm.c
> > @@ -0,0 +1,138 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright 2021 NXP
> > + */
> > +
> > +#include <dt-bindings/clock/imx8mm-clock.h>
> > +#include <dt-bindings/power/imx8mm-power.h>
> > +#include <linux/clk.h>
> > +#include <linux/err.h>
> > +#include <linux/io.h>
> > +#include <linux/module.h>
> > +#include <linux/mutex.h>
> > +#include <linux/of_address.h>
> > +#include <linux/of_device.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/slab.h>
> > +#include <linux/types.h>
> > +#include <linux/pm_domain.h>
> > +#include <linux/regmap.h>
> > +
> > +#include "blk-ctl.h"
> > +
> > +#define MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN
> BIT(6)
> > +#define MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN
> BIT(5)
> > +#define MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN
> BIT(4)
> > +#define MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN
> BIT(3)
> > +#define MEDIA_BLK_CSI_BRIDGE_SFT_EN
> GENMASK(2, 0)
> > +
> > +#define MEDIA_BLK_BUS_PD_MASK
> BIT(12)
> > +#define MEDIA_BLK_MIPI_CSI_PD_MASK
> GENMASK(11, 10)
> > +#define MEDIA_BLK_MIPI_DSI_PD_MASK
> GENMASK(9, 8)
> > +#define MEDIA_BLK_LCDIF_PD_MASK
> GENMASK(7, 6)
> > +#define MEDIA_BLK_CSI_BRIDGE_PD_MASK
> GENMASK(5, 0)
> > +
> > +static struct imx_blk_ctl_hw imx8mm_dispmix_blk_ctl_pds[] = {
> > +       IMX_BLK_CTL_PD("CSI_BRIDGE", "dispmix",
> IMX8MM_BLK_CTL_DISPMIX_CSI_BRIDGE, 0x4,
> > +                      MEDIA_BLK_CSI_BRIDGE_PD_MASK, 0,
> MEDIA_BLK_CSI_BRIDGE_SFT_EN,
> > +                      IMX_BLK_CTL_PD_RESET),
> > +       IMX_BLK_CTL_PD("LCDIF", "dispmix",
> IMX8MM_BLK_CTL_DISPMIX_LCDIF, 0x4,
> > +                      MEDIA_BLK_LCDIF_PD_MASK, -1, -1, 0),
> > +       IMX_BLK_CTL_PD("MIPI_DSI", "mipi",
> IMX8MM_BLK_CTL_DISPMIX_MIPI_DSI, 0x4,
> > +                      MEDIA_BLK_MIPI_DSI_PD_MASK, 0,
> MEDIA_BLK_MIPI_DSI_I_PRESETN_SFT_EN,
> > +                      IMX_BLK_CTL_PD_RESET),
> > +       IMX_BLK_CTL_PD("MIPI_CSI", "mipi",
> IMX8MM_BLK_CTL_DISPMIX_MIPI_CSI, 0x4,
> > +                      MEDIA_BLK_MIPI_CSI_PD_MASK, 0,
> > +                      MEDIA_BLK_MIPI_CSI_I_PRESETN_SFT_EN |
> MEDIA_BLK_CAMERA_PIXEL_RESET_N_SFT_EN,
> > +                      IMX_BLK_CTL_PD_RESET) };
> > +
> > +static struct imx_blk_ctl_hw imx8mm_vpumix_blk_ctl_pds[] = {
> > +       IMX_BLK_CTL_PD("VPU_BLK_CTL_G2", "vpu-g2",
> IMX8MM_BLK_CTL_G2_PD, 0x4,
> > +                      BIT(0), 0, BIT(0), IMX_BLK_CTL_PD_RESET),
> > +       IMX_BLK_CTL_PD("VPU_BLK_CTL_G1", "vpu-g1",
> IMX8MM_BLK_CTL_G1_PD, 0x4,
> > +                      BIT(1), 0, BIT(1), IMX_BLK_CTL_PD_RESET),
> > +       IMX_BLK_CTL_PD("VPU_BLK_CTL_H1", "vpu-h1",
> IMX8MM_BLK_CTL_H1_PD, 0x4,
> > +                      BIT(2), 0, BIT(2),
> IMX_BLK_CTL_PD_HANDSHAKE |
> > +IMX_BLK_CTL_PD_RESET),
> 
> Question for you or the group,
> 
> I am trying to port this code to the Nano.  I have the various virtual domains
> for ISI, CSI, DSI, LCDIF, etc. but the system doesn't wake from sleep.

You mean suspend/resume?

  I notice
> that the IMX_BLK_CTL_PD_HANDSHAKE is only used occasionally, and I was
> hoping someone could help me identify when it's needed.  I know the Nano
> doesn't have the VPU, but I want to make sure I'm not missing a
> IMX_BLK_CTL_PD_HANDSHAKE if necessary.

IMX_BLK_CTL_PD_HANDSHAKE is mostly for the bus clk of the blk ctl,
but vpu not have a dedicated bus clk for handshake, however H1 clk
could be used for handshake, so I mark it with IMX_BLK_CTL_PD_HANDSHAKE.

Regards,
Peng.

> 
> I could also post an RFC to get feedback if that helps.
> 
> adam
> 
> > +};
> > +
> > +static const struct regmap_config imx8mm_blk_ctl_regmap_config = {
> > +       .reg_bits               = 32,
> > +       .reg_stride             = 4,
> > +       .val_bits               = 32,
> > +       .max_register           = 0x30,
> > +       .fast_io                = true,
> > +};
> > +
> > +static const struct imx_blk_ctl_dev_data
> imx8mm_vpumix_blk_ctl_dev_data = {
> > +       .pds = imx8mm_vpumix_blk_ctl_pds,
> > +       .pds_num = ARRAY_SIZE(imx8mm_vpumix_blk_ctl_pds),
> > +       .hw_hsk = IMX_BLK_CTL_PD(NULL, NULL,
> IMX8MM_BLK_CTL_H1_PD, 0x4, BIT(2), 0, BIT(2),
> > +                                IMX_BLK_CTL_PD_HANDSHAKE),
> > +       .config = imx8mm_blk_ctl_regmap_config,
> > +       .active_pd_names = (char*[]){"vpumix", "g1", "g2", "h1"},
> > +       .num_active_pd = 4,
> > +};
> > +
> > +static const struct imx_blk_ctl_dev_data
> imx8mm_dispmix_blk_ctl_dev_data = {
> > +       .pds = imx8mm_dispmix_blk_ctl_pds,
> > +       .pds_num = ARRAY_SIZE(imx8mm_dispmix_blk_ctl_pds),
> > +       .hw_hsk = IMX_BLK_CTL_PD(NULL, NULL, -1, 0x4,
> MEDIA_BLK_BUS_PD_MASK, 0,
> > +
> MEDIA_BLK_BUS_RSTN_BLK_SYNC_SFT_EN,
> > +                                IMX_BLK_CTL_PD_HANDSHAKE |
> IMX_BLK_CTL_PD_RESET),
> > +       .config = imx8mm_blk_ctl_regmap_config,
> > +       .active_pd_names = (char*[]){"dispmix", "mipi"},
> > +       .num_active_pd = 2,
> > +};
> > +
> > +static int imx8mm_blk_ctl_probe(struct platform_device *pdev) {
> > +       struct device *dev = &pdev->dev;
> > +       const struct imx_blk_ctl_dev_data *dev_data =
> of_device_get_match_data(dev);
> > +       struct regmap *regmap;
> > +       struct imx_blk_ctl *ctl;
> > +       void __iomem *base;
> > +
> > +       ctl = devm_kzalloc(dev, sizeof(*ctl), GFP_KERNEL);
> > +       if (!ctl)
> > +               return -ENOMEM;
> > +
> > +       base = devm_platform_ioremap_resource(pdev, 0);
> > +       if (IS_ERR(base))
> > +               return PTR_ERR(base);
> > +
> > +       regmap = devm_regmap_init_mmio(dev, base,
> &dev_data->config);
> > +       if (IS_ERR(regmap))
> > +               return PTR_ERR(regmap);
> > +
> > +       ctl->regmap = regmap;
> > +       ctl->dev = dev;
> > +       ctl->power_count = 0;
> > +       mutex_init(&ctl->lock);
> > +
> > +       ctl->num_clks = devm_clk_bulk_get_all(dev, &ctl->clks);
> > +       if (ctl->num_clks < 0)
> > +               return ctl->num_clks;
> > +
> > +       dev_set_drvdata(dev, ctl);
> > +       ctl->dev_data = dev_data;
> > +
> > +       return imx_blk_ctl_register(dev); }
> > +
> > +static const struct of_device_id imx_blk_ctl_of_match[] = {
> > +       { .compatible = "fsl,imx8mm-vpumix-blk-ctl", .data =
> &imx8mm_vpumix_blk_ctl_dev_data },
> > +       { .compatible = "fsl,imx8mm-dispmix-blk-ctl", .data =
> &imx8mm_dispmix_blk_ctl_dev_data },
> > +       { /* Sentinel */ }
> > +};
> > +MODULE_DEVICE_TABLE(of, imx_blk_ctl_of_match);
> > +
> > +static struct platform_driver imx_blk_ctl_driver = {
> > +       .probe = imx8mm_blk_ctl_probe,
> > +       .driver = {
> > +               .name = "imx8mm-blk-ctl",
> > +               .of_match_table =
> of_match_ptr(imx_blk_ctl_of_match),
> > +               .pm = &imx_blk_ctl_pm_ops,
> > +       },
> > +};
> > +module_platform_driver(imx_blk_ctl_driver);
> > --
> > 2.30.0
> >
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^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2021-05-08  0:56 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-06  4:15 [PATCH V3 0/4] soc: imx: add i.MX BLK-CTL support Peng Fan (OSS)
2021-05-06  4:15 ` [PATCH V3 1/4] dt-bindings: power: Add defines for i.MX8MM BLK-CTL power domains Peng Fan (OSS)
2021-05-06  7:15   ` Frieder Schrempf
2021-05-06  7:51   ` Abel Vesa
2021-05-06  4:15 ` [PATCH V3 2/4] Documentation: bindings: clk: Add bindings for i.MX BLK_CTL Peng Fan (OSS)
2021-05-07  1:02   ` Rob Herring
2021-05-06  4:15 ` [PATCH V3 3/4] soc: imx: Add generic blk-ctl driver Peng Fan (OSS)
2021-05-06  7:31   ` Frieder Schrempf
2021-05-06  4:15 ` [PATCH V3 4/4] soc: imx: Add blk-ctl driver for i.MX8MM Peng Fan (OSS)
2021-05-06  7:56   ` Abel Vesa
2021-05-07 12:53   ` Adam Ford
2021-05-08  0:54     ` Peng Fan

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