[PATCH v2 u-boot 0/2] Add the VPU Power Domain support

[PATCH v2 u-boot 0/2] Add the VPU Power Domain support

[Neil Armstrong]

The Amlogic Meson SoCs embeds a specific Power Domain dedicated to the
Video Processing Unit.
The first patch implements support for this power domain in preparation of the
future support for the Video display support in U-Boot.

The second patch adds changes in the clock driver to handle the setup
of the VPU and VAPB clocks configured from DT using assigned-clocks entries.

Changes since v1:
- Fixed "format '%d' expects argument of type 'int', but argument 4 has type 'long unsigned int'" in clk_meson.c

Neil Armstrong (2):
  power: domain: Add the VPU Power Domain driver
  clk: clk_meson: Add mux and div support for reparent and rate setting

 drivers/clk/clk_meson.c                  | 533 ++++++++++++++++++++++++++++++-
 drivers/power/domain/Kconfig             |   7 +
 drivers/power/domain/Makefile            |   1 +
 drivers/power/domain/meson-gx-pwrc-vpu.c | 198 ++++++++++++
 4 files changed, 734 insertions(+), 5 deletions(-)
 create mode 100644 drivers/power/domain/meson-gx-pwrc-vpu.c

-- 
2.7.4

[PATCH v2 u-boot 1/2] power: domain: Add the VPU Power Domain driver

[Neil Armstrong]

The Amlogic Meson SoCs embeds a specific Power Domain dedicated to the
Video Processing Unit.
This patch implements support for this power domain in preparation of the
future support for the Video display support in U-Boot.

This driver will depend on changes in the clock driver to handle the setup
of the VPU and VAPB clocks configured from DT using assigned-clocks entries.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/power/domain/Kconfig             |   7 ++
 drivers/power/domain/Makefile            |   1 +
 drivers/power/domain/meson-gx-pwrc-vpu.c | 198 +++++++++++++++++++++++++++++++
 3 files changed, 206 insertions(+)
 create mode 100644 drivers/power/domain/meson-gx-pwrc-vpu.c

diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig
index 7cfa761..4618847 100644
--- a/drivers/power/domain/Kconfig
+++ b/drivers/power/domain/Kconfig
@@ -16,6 +16,13 @@ config BCM6328_POWER_DOMAIN
 	  Enable support for manipulating BCM6345 power domains via MMIO
 	  mapped registers.
 
+config MESON_GX_VPU_POWER_DOMAIN
+	bool "Enable Amlogic Meson GX VPU power domain driver"
+	depends on ARCH_MESON
+	help
+	  Enable support for manipulating Amlogic Meson GX Video Processing
+	  Unit power domain.
+
 config SANDBOX_POWER_DOMAIN
 	bool "Enable the sandbox power domain test driver"
 	depends on POWER_DOMAIN && SANDBOX
diff --git a/drivers/power/domain/Makefile b/drivers/power/domain/Makefile
index c7d7644..4a3282b 100644
--- a/drivers/power/domain/Makefile
+++ b/drivers/power/domain/Makefile
@@ -4,6 +4,7 @@
 
 obj-$(CONFIG_POWER_DOMAIN) += power-domain-uclass.o
 obj-$(CONFIG_BCM6328_POWER_DOMAIN) += bcm6328-power-domain.o
+obj-$(CONFIG_MESON_GX_VPU_POWER_DOMAIN) += meson-gx-pwrc-vpu.o
 obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain.o
 obj-$(CONFIG_SANDBOX_POWER_DOMAIN) += sandbox-power-domain-test.o
 obj-$(CONFIG_TEGRA186_POWER_DOMAIN) += tegra186-power-domain.o
diff --git a/drivers/power/domain/meson-gx-pwrc-vpu.c b/drivers/power/domain/meson-gx-pwrc-vpu.c
new file mode 100644
index 0000000..d631d3e
--- /dev/null
+++ b/drivers/power/domain/meson-gx-pwrc-vpu.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Amlogic Meson VPU Power Domain Controller driver
+ *
+ * Copyright (c) 2018 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <power-domain-uclass.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <reset.h>
+#include <clk.h>
+
+/* AO Offsets */
+
+#define AO_RTI_GEN_PWR_SLEEP0		(0x3a << 2)
+
+#define GEN_PWR_VPU_HDMI		BIT(8)
+#define GEN_PWR_VPU_HDMI_ISO		BIT(9)
+
+/* HHI Offsets */
+
+#define HHI_MEM_PD_REG0			(0x40 << 2)
+#define HHI_VPU_MEM_PD_REG0		(0x41 << 2)
+#define HHI_VPU_MEM_PD_REG1		(0x42 << 2)
+
+struct meson_gx_pwrc_vpu_priv {
+	struct regmap *regmap_ao;
+	struct regmap *regmap_hhi;
+	struct reset_ctl_bulk resets;
+	struct clk_bulk clks;
+};
+
+static int meson_gx_pwrc_vpu_request(struct power_domain *power_domain)
+{
+	return 0;
+}
+
+static int meson_gx_pwrc_vpu_free(struct power_domain *power_domain)
+{
+	return 0;
+}
+
+static int meson_gx_pwrc_vpu_on(struct power_domain *power_domain)
+{
+	struct meson_gx_pwrc_vpu_priv *priv = dev_get_priv(power_domain->dev);
+	int i, ret;
+
+	regmap_update_bits(priv->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, 0);
+	udelay(20);
+
+	/* Power Up Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(priv->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x3 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(priv->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x3 << i, 0);
+		udelay(5);
+	}
+
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(priv->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), 0);
+		udelay(5);
+	}
+	udelay(20);
+
+	ret = reset_assert_bulk(&priv->resets);
+	if (ret)
+		return ret;
+
+	regmap_update_bits(priv->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, 0);
+
+	ret = reset_deassert_bulk(&priv->resets);
+	if (ret)
+		return ret;
+
+	ret = clk_enable_bulk(&priv->clks);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int meson_gx_pwrc_vpu_off(struct power_domain *power_domain)
+{
+	struct meson_gx_pwrc_vpu_priv *priv = dev_get_priv(power_domain->dev);
+	int i;
+
+	regmap_update_bits(priv->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI_ISO, GEN_PWR_VPU_HDMI_ISO);
+	udelay(20);
+
+	/* Power Down Memories */
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(priv->regmap_hhi, HHI_VPU_MEM_PD_REG0,
+				   0x3 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 0; i < 32; i += 2) {
+		regmap_update_bits(priv->regmap_hhi, HHI_VPU_MEM_PD_REG1,
+				   0x3 << i, 0x3 << i);
+		udelay(5);
+	}
+	for (i = 8; i < 16; i++) {
+		regmap_update_bits(priv->regmap_hhi, HHI_MEM_PD_REG0,
+				   BIT(i), BIT(i));
+		udelay(5);
+	}
+	udelay(20);
+
+	regmap_update_bits(priv->regmap_ao, AO_RTI_GEN_PWR_SLEEP0,
+			   GEN_PWR_VPU_HDMI, GEN_PWR_VPU_HDMI);
+	mdelay(20);
+
+	clk_disable_bulk(&priv->clks);
+
+	return 0;
+}
+
+static int meson_gx_pwrc_vpu_of_xlate(struct power_domain *power_domain,
+				      struct ofnode_phandle_args *args)
+{
+	/* #power-domain-cells is 0 */
+
+	if (args->args_count != 0) {
+		debug("Invalid args_count: %d\n", args->args_count);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+struct power_domain_ops meson_gx_pwrc_vpu_ops = {
+	.free = meson_gx_pwrc_vpu_free,
+	.off = meson_gx_pwrc_vpu_off,
+	.on = meson_gx_pwrc_vpu_on,
+	.request = meson_gx_pwrc_vpu_request,
+	.of_xlate = meson_gx_pwrc_vpu_of_xlate,
+};
+
+static const struct udevice_id meson_gx_pwrc_vpu_ids[] = {
+	{ .compatible = "amlogic,meson-gx-pwrc-vpu" },
+	{ }
+};
+
+static int meson_gx_pwrc_vpu_probe(struct udevice *dev)
+{
+	struct meson_gx_pwrc_vpu_priv *priv = dev_get_priv(dev);
+	u32 hhi_phandle;
+	ofnode hhi_node;
+	int ret;
+
+	priv->regmap_ao = syscon_node_to_regmap(dev_get_parent(dev)->node);
+	if (IS_ERR(priv->regmap_ao))
+		return PTR_ERR(priv->regmap_ao);
+
+	ret = ofnode_read_u32(dev->node, "amlogic,hhi-sysctrl",
+			      &hhi_phandle);
+	if (ret)
+		return ret;
+
+	hhi_node = ofnode_get_by_phandle(hhi_phandle);
+	if (!ofnode_valid(hhi_node))
+		return -EINVAL;
+
+	priv->regmap_hhi = syscon_node_to_regmap(hhi_node);
+	if (IS_ERR(priv->regmap_hhi))
+		return PTR_ERR(priv->regmap_hhi);
+
+	ret = reset_get_bulk(dev, &priv->resets);
+	if (ret)
+		return ret;
+
+	ret = clk_get_bulk(dev, &priv->clks);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(meson_gx_pwrc_vpu) = {
+	.name = "meson_gx_pwrc_vpu",
+	.id = UCLASS_POWER_DOMAIN,
+	.of_match = meson_gx_pwrc_vpu_ids,
+	.probe = meson_gx_pwrc_vpu_probe,
+	.ops = &meson_gx_pwrc_vpu_ops,
+	.priv_auto_alloc_size = sizeof(struct meson_gx_pwrc_vpu_priv),
+};
-- 
2.7.4

[PATCH v2 u-boot 2/2] clk: clk_meson: Add mux and div support for reparent and rate setting

[Neil Armstrong]

This patch adds support for :
- Rate calculation through muxes and generic dividers
- Basic gate setting propagation
- Reparenting for muxes
- Clock rate setting through generic dividers without reparenting

Support is only added to the Composite VPU and VAPB clocks in order
to support the Video Processing Unit Power Domain clock setup.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/clk/clk_meson.c | 533 +++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 528 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk_meson.c b/drivers/clk/clk_meson.c
index 3850128..236d734 100644
--- a/drivers/clk/clk_meson.c
+++ b/drivers/clk/clk_meson.c
@@ -14,12 +14,69 @@
 #include <dt-bindings/clock/gxbb-clkc.h>
 #include "clk_meson.h"
 
+/* This driver support only basic clock tree operations :
+ * - Can calculate clock frequency on a limited tree
+ * - Can Read muxes and basic dividers (0-based only)
+ * - Can enable/disable gates with limited propagation
+ * - Can reparent without propagation, only on muxes
+ * - Can set rates without reparenting
+ * This driver is adapted to what is actually supported by U-Boot
+ */
+
+/* Only the clocks ids we don't want to expose, such as the internal muxes
+ * and dividers of composite clocks, will remain defined here.
+ */
+#define CLKID_MPEG_SEL		  10
+#define CLKID_MPEG_DIV		  11
+#define CLKID_SAR_ADC_DIV	  99
+#define CLKID_MALI_0_DIV	  101
+#define CLKID_MALI_1_DIV	  104
+#define CLKID_CTS_AMCLK_SEL	  108
+#define CLKID_CTS_AMCLK_DIV	  109
+#define CLKID_CTS_MCLK_I958_SEL	  111
+#define CLKID_CTS_MCLK_I958_DIV	  112
+#define CLKID_32K_CLK_SEL	  115
+#define CLKID_32K_CLK_DIV	  116
+#define CLKID_SD_EMMC_A_CLK0_SEL  117
+#define CLKID_SD_EMMC_A_CLK0_DIV  118
+#define CLKID_SD_EMMC_B_CLK0_SEL  120
+#define CLKID_SD_EMMC_B_CLK0_DIV  121
+#define CLKID_SD_EMMC_C_CLK0_SEL  123
+#define CLKID_SD_EMMC_C_CLK0_DIV  124
+#define CLKID_VPU_0_DIV		  127
+#define CLKID_VPU_1_DIV		  130
+#define CLKID_VAPB_0_DIV	  134
+#define CLKID_VAPB_1_DIV	  137
+#define CLKID_HDMI_PLL_PRE_MULT	  141
+#define CLKID_MPLL0_DIV		  142
+#define CLKID_MPLL1_DIV		  143
+#define CLKID_MPLL2_DIV		  144
+#define CLKID_MPLL_PREDIV	  145
+#define CLKID_FCLK_DIV2_DIV	  146
+#define CLKID_FCLK_DIV3_DIV	  147
+#define CLKID_FCLK_DIV4_DIV	  148
+#define CLKID_FCLK_DIV5_DIV	  149
+#define CLKID_FCLK_DIV7_DIV	  150
+#define CLKID_VDEC_1_SEL	  151
+#define CLKID_VDEC_1_DIV	  152
+#define CLKID_VDEC_HEVC_SEL	  154
+#define CLKID_VDEC_HEVC_DIV	  155
+
 #define XTAL_RATE 24000000
 
 struct meson_clk {
 	void __iomem *addr;
 };
 
+static ulong meson_div_get_rate(struct clk *clk, unsigned long id);
+static ulong meson_div_set_rate(struct clk *clk, unsigned long id, ulong rate,
+				ulong current_rate);
+static ulong meson_mux_set_parent(struct clk *clk, unsigned long id,
+				  unsigned long parent_id);
+static ulong meson_mux_get_rate(struct clk *clk, unsigned long id);
+static ulong meson_clk_set_rate_by_id(struct clk *clk, unsigned long id,
+				      ulong rate, ulong current_rate);
+static ulong meson_mux_get_parent(struct clk *clk, unsigned long id);
 static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id);
 
 struct meson_gate gates[] = {
@@ -126,34 +183,387 @@ struct meson_gate gates[] = {
 	MESON_GATE(CLKID_SD_EMMC_A_CLK0, HHI_SD_EMMC_CLK_CNTL, 7),
 	MESON_GATE(CLKID_SD_EMMC_B_CLK0, HHI_SD_EMMC_CLK_CNTL, 23),
 	MESON_GATE(CLKID_SD_EMMC_C_CLK0, HHI_NAND_CLK_CNTL, 7),
+	MESON_GATE(CLKID_VPU_0, HHI_VPU_CLK_CNTL, 8),
+	MESON_GATE(CLKID_VPU_1, HHI_VPU_CLK_CNTL, 24),
+	MESON_GATE(CLKID_VAPB_0, HHI_VAPBCLK_CNTL, 8),
+	MESON_GATE(CLKID_VAPB_1, HHI_VAPBCLK_CNTL, 24),
+	MESON_GATE(CLKID_VAPB, HHI_VAPBCLK_CNTL, 30),
 };
 
-static int meson_set_gate(struct clk *clk, bool on)
+static int meson_set_gate_by_id(struct clk *clk, unsigned long id, bool on)
 {
 	struct meson_clk *priv = dev_get_priv(clk->dev);
 	struct meson_gate *gate;
 
-	if (clk->id >= ARRAY_SIZE(gates))
+	debug("%s: %sabling %ld\n", __func__, on ? "en" : "dis", id);
+
+	/* Propagate through muxes */
+	switch (id) {
+	case CLKID_VPU:
+		return meson_set_gate_by_id(clk,
+				meson_mux_get_parent(clk, CLKID_VPU), on);
+	case CLKID_VAPB_SEL:
+		return meson_set_gate_by_id(clk,
+				meson_mux_get_parent(clk, CLKID_VAPB_SEL), on);
+	}
+
+	if (id >= ARRAY_SIZE(gates))
 		return -ENOENT;
 
-	gate = &gates[clk->id];
+	gate = &gates[id];
 
 	if (gate->reg == 0)
 		return 0;
 
+	debug("%s: really %sabling %ld\n", __func__, on ? "en" : "dis", id);
+
 	clrsetbits_le32(priv->addr + gate->reg,
 			BIT(gate->bit), on ? BIT(gate->bit) : 0);
+
+	/* Propagate to next gate(s) */
+	switch (id) {
+	case CLKID_VAPB:
+		return meson_set_gate_by_id(clk, CLKID_VAPB_SEL, on);
+	}
+
 	return 0;
 }
 
 static int meson_clk_enable(struct clk *clk)
 {
-	return meson_set_gate(clk, true);
+	return meson_set_gate_by_id(clk, clk->id, true);
 }
 
 static int meson_clk_disable(struct clk *clk)
 {
-	return meson_set_gate(clk, false);
+	return meson_set_gate_by_id(clk, clk->id, false);
+}
+
+static struct parm meson_vpu_0_div_parm = {
+	HHI_VPU_CLK_CNTL, 0, 7,
+};
+
+int meson_vpu_0_div_parent = CLKID_VPU_0_SEL;
+
+static struct parm meson_vpu_1_div_parm = {
+	HHI_VPU_CLK_CNTL, 16, 7,
+};
+
+int meson_vpu_1_div_parent = CLKID_VPU_1_SEL;
+
+static struct parm meson_vapb_0_div_parm = {
+	HHI_VAPBCLK_CNTL, 0, 7,
+};
+
+int meson_vapb_0_div_parent = CLKID_VAPB_0_SEL;
+
+static struct parm meson_vapb_1_div_parm = {
+	HHI_VAPBCLK_CNTL, 16, 7,
+};
+
+int meson_vapb_1_div_parent = CLKID_VAPB_1_SEL;
+
+static ulong meson_div_get_rate(struct clk *clk, unsigned long id)
+{
+	struct meson_clk *priv = dev_get_priv(clk->dev);
+	unsigned int rate, parent_rate;
+	struct parm *parm;
+	int parent;
+	u32 reg;
+
+	switch (id) {
+	case CLKID_VPU_0_DIV:
+		parm = &meson_vpu_0_div_parm;
+		parent = meson_vpu_0_div_parent;
+		break;
+	case CLKID_VPU_1_DIV:
+		parm = &meson_vpu_1_div_parm;
+		parent = meson_vpu_1_div_parent;
+		break;
+	case CLKID_VAPB_0_DIV:
+		parm = &meson_vapb_0_div_parm;
+		parent = meson_vapb_0_div_parent;
+		break;
+	case CLKID_VAPB_1_DIV:
+		parm = &meson_vapb_1_div_parm;
+		parent = meson_vapb_1_div_parent;
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	reg = readl(priv->addr + parm->reg_off);
+	reg = PARM_GET(parm->width, parm->shift, reg);
+
+	debug("%s: div of %ld is %d\n", __func__, id, reg + 1);
+
+	parent_rate = meson_clk_get_rate_by_id(clk, parent);
+	if (IS_ERR_VALUE(parent_rate))
+		return parent_rate;
+
+	debug("%s: parent rate of %ld is %d\n", __func__, id, parent_rate);
+
+	rate = parent_rate / (reg + 1);
+
+	debug("%s: rate of %ld is %d\n", __func__, id, rate);
+
+	return rate;
+}
+
+static ulong meson_div_set_rate(struct clk *clk, unsigned long id, ulong rate,
+				ulong current_rate)
+{
+	struct meson_clk *priv = dev_get_priv(clk->dev);
+	unsigned int new_div = -EINVAL;
+	unsigned long parent_rate;
+	struct parm *parm;
+	int parent;
+	u32 reg;
+	int ret;
+
+	if (current_rate == rate)
+		return 0;
+
+	debug("%s: setting rate of %ld from %ld to %ld\n",
+	      __func__, id, current_rate, rate);
+
+	switch (id) {
+	case CLKID_VPU_0_DIV:
+		parm = &meson_vpu_0_div_parm;
+		parent = meson_vpu_0_div_parent;
+		break;
+	case CLKID_VPU_1_DIV:
+		parm = &meson_vpu_1_div_parm;
+		parent = meson_vpu_1_div_parent;
+		break;
+	case CLKID_VAPB_0_DIV:
+		parm = &meson_vapb_0_div_parm;
+		parent = meson_vapb_0_div_parent;
+		break;
+	case CLKID_VAPB_1_DIV:
+		parm = &meson_vapb_1_div_parm;
+		parent = meson_vapb_1_div_parent;
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	parent_rate = meson_clk_get_rate_by_id(clk, parent);
+	if (IS_ERR_VALUE(parent_rate))
+		return parent_rate;
+
+	debug("%s: parent rate of %ld is %ld\n", __func__, id, parent_rate);
+
+	/* If can't divide, set parent instead */
+	if (!parent_rate || rate > parent_rate)
+		return meson_clk_set_rate_by_id(clk, parent, rate,
+						current_rate);
+
+	new_div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+	debug("%s: new div of %ld is %d\n", __func__, id, new_div);
+
+	/* If overflow, try to set parent rate and retry */
+	if (!new_div || new_div > (1 << parm->width)) {
+		ret = meson_clk_set_rate_by_id(clk, parent, rate, current_rate);
+		if (IS_ERR_VALUE(ret))
+			return ret;
+
+		parent_rate = meson_clk_get_rate_by_id(clk, parent);
+		if (IS_ERR_VALUE(parent_rate))
+			return parent_rate;
+
+		new_div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+		debug("%s: new new div of %ld is %d\n", __func__, id, new_div);
+
+		if (!new_div || new_div > (1 << parm->width))
+			return -EINVAL;
+	}
+
+	debug("%s: setting div of %ld to %d\n", __func__, id, new_div);
+
+	reg = readl(priv->addr + parm->reg_off);
+	writel(PARM_SET(parm->width, parm->shift, reg, new_div - 1),
+	       priv->addr + parm->reg_off);
+
+	debug("%s: new rate of %ld is %ld\n",
+	      __func__, id, meson_div_get_rate(clk, id));
+
+	return 0;
+}
+
+static struct parm meson_vpu_mux_parm = {
+	HHI_VPU_CLK_CNTL, 31, 1,
+};
+
+int meson_vpu_mux_parents[] = {
+	CLKID_VPU_0,
+	CLKID_VPU_1,
+};
+
+static struct parm meson_vpu_0_mux_parm = {
+	HHI_VPU_CLK_CNTL, 9, 2,
+};
+
+static struct parm meson_vpu_1_mux_parm = {
+	HHI_VPU_CLK_CNTL, 25, 2,
+};
+
+static int meson_vpu_0_1_mux_parents[] = {
+	CLKID_FCLK_DIV4,
+	CLKID_FCLK_DIV3,
+	CLKID_FCLK_DIV5,
+	CLKID_FCLK_DIV7,
+};
+
+static struct parm meson_vapb_sel_mux_parm = {
+	HHI_VAPBCLK_CNTL, 31, 1,
+};
+
+int meson_vapb_sel_mux_parents[] = {
+	CLKID_VAPB_0,
+	CLKID_VAPB_1,
+};
+
+static struct parm meson_vapb_0_mux_parm = {
+	HHI_VAPBCLK_CNTL, 9, 2,
+};
+
+static struct parm meson_vapb_1_mux_parm = {
+	HHI_VAPBCLK_CNTL, 25, 2,
+};
+
+static int meson_vapb_0_1_mux_parents[] = {
+	CLKID_FCLK_DIV4,
+	CLKID_FCLK_DIV3,
+	CLKID_FCLK_DIV5,
+	CLKID_FCLK_DIV7,
+};
+
+static ulong meson_mux_get_parent(struct clk *clk, unsigned long id)
+{
+	struct meson_clk *priv = dev_get_priv(clk->dev);
+	struct parm *parm;
+	int *parents;
+	u32 reg;
+
+	switch (id) {
+	case CLKID_VPU:
+		parm = &meson_vpu_mux_parm;
+		parents = meson_vpu_mux_parents;
+		break;
+	case CLKID_VPU_0_SEL:
+		parm = &meson_vpu_0_mux_parm;
+		parents = meson_vpu_0_1_mux_parents;
+		break;
+	case CLKID_VPU_1_SEL:
+		parm = &meson_vpu_1_mux_parm;
+		parents = meson_vpu_0_1_mux_parents;
+		break;
+	case CLKID_VAPB_SEL:
+		parm = &meson_vapb_sel_mux_parm;
+		parents = meson_vapb_sel_mux_parents;
+		break;
+	case CLKID_VAPB_0_SEL:
+		parm = &meson_vapb_0_mux_parm;
+		parents = meson_vapb_0_1_mux_parents;
+		break;
+	case CLKID_VAPB_1_SEL:
+		parm = &meson_vapb_1_mux_parm;
+		parents = meson_vapb_0_1_mux_parents;
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	reg = readl(priv->addr + parm->reg_off);
+	reg = PARM_GET(parm->width, parm->shift, reg);
+
+	debug("%s: parent of %ld is %d (%d)\n",
+	      __func__, id, parents[reg], reg);
+
+	return parents[reg];
+}
+
+static ulong meson_mux_set_parent(struct clk *clk, unsigned long id,
+				  unsigned long parent_id)
+{
+	unsigned long cur_parent = meson_mux_get_parent(clk, id);
+	struct meson_clk *priv = dev_get_priv(clk->dev);
+	unsigned int new_index = -EINVAL;
+	struct parm *parm;
+	int *parents;
+	u32 reg;
+	int i;
+
+	if (IS_ERR_VALUE(cur_parent))
+		return cur_parent;
+
+	debug("%s: setting parent of %ld from %ld to %ld\n",
+	      __func__, id, cur_parent, parent_id);
+
+	if (cur_parent == parent_id)
+		return 0;
+
+	switch (id) {
+	case CLKID_VPU:
+		parm = &meson_vpu_mux_parm;
+		parents = meson_vpu_mux_parents;
+		break;
+	case CLKID_VPU_0_SEL:
+		parm = &meson_vpu_0_mux_parm;
+		parents = meson_vpu_0_1_mux_parents;
+		break;
+	case CLKID_VPU_1_SEL:
+		parm = &meson_vpu_1_mux_parm;
+		parents = meson_vpu_0_1_mux_parents;
+		break;
+	case CLKID_VAPB_SEL:
+		parm = &meson_vapb_sel_mux_parm;
+		parents = meson_vapb_sel_mux_parents;
+		break;
+	case CLKID_VAPB_0_SEL:
+		parm = &meson_vapb_0_mux_parm;
+		parents = meson_vapb_0_1_mux_parents;
+		break;
+	case CLKID_VAPB_1_SEL:
+		parm = &meson_vapb_1_mux_parm;
+		parents = meson_vapb_0_1_mux_parents;
+		break;
+	default:
+		/* Not a mux */
+		return -ENOENT;
+	}
+
+	for (i = 0 ; i < (1 << parm->width) ; ++i) {
+		if (parents[i] == parent_id)
+			new_index = i;
+	}
+
+	if (IS_ERR_VALUE(new_index))
+		return new_index;
+
+	debug("%s: new index of %ld is %d\n", __func__, id, new_index);
+
+	reg = readl(priv->addr + parm->reg_off);
+	writel(PARM_SET(parm->width, parm->shift, reg, new_index),
+	       priv->addr + parm->reg_off);
+
+	debug("%s: new parent of %ld is %ld\n",
+	      __func__, id, meson_mux_get_parent(clk, id));
+
+	return 0;
+}
+
+static ulong meson_mux_get_rate(struct clk *clk, unsigned long id)
+{
+	int parent = meson_mux_get_parent(clk, id);
+
+	if (IS_ERR_VALUE(parent))
+		return parent;
+
+	return meson_clk_get_rate_by_id(clk, parent);
 }
 
 static unsigned long meson_clk81_get_rate(struct clk *clk)
@@ -342,6 +752,35 @@ static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id)
 	case CLKID_CLK81:
 		rate = meson_clk81_get_rate(clk);
 		break;
+	case CLKID_VPU_0:
+		rate = meson_div_get_rate(clk, CLKID_VPU_0_DIV);
+		break;
+	case CLKID_VPU_1:
+		rate = meson_div_get_rate(clk, CLKID_VPU_1_DIV);
+		break;
+	case CLKID_VAPB:
+		rate = meson_mux_get_rate(clk, CLKID_VAPB_SEL);
+		break;
+	case CLKID_VAPB_0:
+		rate = meson_div_get_rate(clk, CLKID_VAPB_0_DIV);
+		break;
+	case CLKID_VAPB_1:
+		rate = meson_div_get_rate(clk, CLKID_VAPB_1_DIV);
+		break;
+	case CLKID_VPU_0_DIV:
+	case CLKID_VPU_1_DIV:
+	case CLKID_VAPB_0_DIV:
+	case CLKID_VAPB_1_DIV:
+		rate = meson_div_get_rate(clk, id);
+		break;
+	case CLKID_VPU:
+	case CLKID_VPU_0_SEL:
+	case CLKID_VPU_1_SEL:
+	case CLKID_VAPB_SEL:
+	case CLKID_VAPB_0_SEL:
+	case CLKID_VAPB_1_SEL:
+		rate = meson_mux_get_rate(clk, id);
+		break;
 	default:
 		if (gates[id].reg != 0) {
 			/* a clock gate */
@@ -360,6 +799,88 @@ static ulong meson_clk_get_rate(struct clk *clk)
 	return meson_clk_get_rate_by_id(clk, clk->id);
 }
 
+static int meson_clk_set_parent(struct clk *clk, struct clk *parent)
+{
+	return meson_mux_set_parent(clk, clk->id, parent->id);
+}
+
+static ulong meson_clk_set_rate_by_id(struct clk *clk, unsigned long id,
+				      ulong rate, ulong current_rate)
+{
+	if (current_rate == rate)
+		return 0;
+
+	switch (id) {
+	/* Fixed clocks */
+	case CLKID_FIXED_PLL:
+	case CLKID_SYS_PLL:
+	case CLKID_FCLK_DIV2:
+	case CLKID_FCLK_DIV3:
+	case CLKID_FCLK_DIV4:
+	case CLKID_FCLK_DIV5:
+	case CLKID_FCLK_DIV7:
+	case CLKID_MPLL0:
+	case CLKID_MPLL1:
+	case CLKID_MPLL2:
+	case CLKID_CLK81:
+		if (current_rate != rate)
+			return -EINVAL;
+
+		return 0;
+	case CLKID_VPU:
+		return meson_clk_set_rate_by_id(clk,
+				meson_mux_get_parent(clk, CLKID_VPU), rate,
+						     current_rate);
+	case CLKID_VAPB:
+	case CLKID_VAPB_SEL:
+		return meson_clk_set_rate_by_id(clk,
+				meson_mux_get_parent(clk, CLKID_VAPB_SEL),
+				rate, current_rate);
+	case CLKID_VPU_0:
+		return meson_div_set_rate(clk, CLKID_VPU_0_DIV, rate,
+					  current_rate);
+	case CLKID_VPU_1:
+		return meson_div_set_rate(clk, CLKID_VPU_1_DIV, rate,
+					  current_rate);
+	case CLKID_VAPB_0:
+		return meson_div_set_rate(clk, CLKID_VAPB_0_DIV, rate,
+					  current_rate);
+	case CLKID_VAPB_1:
+		return meson_div_set_rate(clk, CLKID_VAPB_1_DIV, rate,
+					  current_rate);
+	case CLKID_VPU_0_DIV:
+	case CLKID_VPU_1_DIV:
+	case CLKID_VAPB_0_DIV:
+	case CLKID_VAPB_1_DIV:
+		return meson_div_set_rate(clk, id, rate, current_rate);
+	default:
+		return -ENOENT;
+	}
+
+	return -EINVAL;
+}
+
+static ulong meson_clk_set_rate(struct clk *clk, ulong rate)
+{
+	ulong current_rate = meson_clk_get_rate_by_id(clk, clk->id);
+	int ret;
+
+	if (IS_ERR_VALUE(current_rate))
+		return current_rate;
+
+	debug("%s: setting rate of %ld from %ld to %ld\n",
+	      __func__, clk->id, current_rate, rate);
+
+	ret = meson_clk_set_rate_by_id(clk, clk->id, rate, current_rate);
+	if (IS_ERR_VALUE(ret))
+		return ret;
+
+	printf("clock %lu has new rate %lu\n", clk->id,
+	       meson_clk_get_rate_by_id(clk, clk->id));
+
+	return 0;
+}
+
 static int meson_clk_probe(struct udevice *dev)
 {
 	struct meson_clk *priv = dev_get_priv(dev);
@@ -375,6 +896,8 @@ static struct clk_ops meson_clk_ops = {
 	.disable	= meson_clk_disable,
 	.enable		= meson_clk_enable,
 	.get_rate	= meson_clk_get_rate,
+	.set_parent	= meson_clk_set_parent,
+	.set_rate	= meson_clk_set_rate,
 };
 
 static const struct udevice_id meson_clk_ids[] = {
-- 
2.7.4

[PATCH v2 u-boot 1/2] power: domain: Add the VPU Power Domain driver

[Beniamino Galvani]

On Mon, Aug 06, 2018 at 02:49:19PM +0200, Neil Armstrong wrote:
> The Amlogic Meson SoCs embeds a specific Power Domain dedicated to the
> Video Processing Unit.
> This patch implements support for this power domain in preparation of the
> future support for the Video display support in U-Boot.
> 
> This driver will depend on changes in the clock driver to handle the setup
> of the VPU and VAPB clocks configured from DT using assigned-clocks entries.
> 
> Reviewed-by: Simon Glass <sjg@chromium.org>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  drivers/power/domain/Kconfig             |   7 ++
>  drivers/power/domain/Makefile            |   1 +
>  drivers/power/domain/meson-gx-pwrc-vpu.c | 198 +++++++++++++++++++++++++++++++
>  3 files changed, 206 insertions(+)
>  create mode 100644 drivers/power/domain/meson-gx-pwrc-vpu.c
> 
> diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig
> index 7cfa761..4618847 100644
> --- a/drivers/power/domain/Kconfig
> +++ b/drivers/power/domain/Kconfig
> @@ -16,6 +16,13 @@ config BCM6328_POWER_DOMAIN
>  	  Enable support for manipulating BCM6345 power domains via MMIO
>  	  mapped registers.
>  
> +config MESON_GX_VPU_POWER_DOMAIN
> +	bool "Enable Amlogic Meson GX VPU power domain driver"
> +	depends on ARCH_MESON

Hi,

since the driver uses syscon_node_to_regmap() I think the Kconfig
entry should also 'select SYSCON'.

Beniamino

[PATCH v2 u-boot 1/2] power: domain: Add the VPU Power Domain driver

[Neil Armstrong]

On 16/08/2018 10:15, Beniamino Galvani wrote:
> On Mon, Aug 06, 2018 at 02:49:19PM +0200, Neil Armstrong wrote:
>> The Amlogic Meson SoCs embeds a specific Power Domain dedicated to the
>> Video Processing Unit.
>> This patch implements support for this power domain in preparation of the
>> future support for the Video display support in U-Boot.
>>
>> This driver will depend on changes in the clock driver to handle the setup
>> of the VPU and VAPB clocks configured from DT using assigned-clocks entries.
>>
>> Reviewed-by: Simon Glass <sjg@chromium.org>
>> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
>> ---
>>  drivers/power/domain/Kconfig             |   7 ++
>>  drivers/power/domain/Makefile            |   1 +
>>  drivers/power/domain/meson-gx-pwrc-vpu.c | 198 +++++++++++++++++++++++++++++++
>>  3 files changed, 206 insertions(+)
>>  create mode 100644 drivers/power/domain/meson-gx-pwrc-vpu.c
>>
>> diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig
>> index 7cfa761..4618847 100644
>> --- a/drivers/power/domain/Kconfig
>> +++ b/drivers/power/domain/Kconfig
>> @@ -16,6 +16,13 @@ config BCM6328_POWER_DOMAIN
>>  	  Enable support for manipulating BCM6345 power domains via MMIO
>>  	  mapped registers.
>>  
>> +config MESON_GX_VPU_POWER_DOMAIN
>> +	bool "Enable Amlogic Meson GX VPU power domain driver"
>> +	depends on ARCH_MESON
> 
> Hi,
> 
> since the driver uses syscon_node_to_regmap() I think the Kconfig
> entry should also 'select SYSCON'.

Exact

> 
> Beniamino
> 

[U-Boot, v2, u-boot, 1/2] power: domain: Add the VPU Power Domain driver

[Tom Rini]

On Mon, Aug 06, 2018 at 02:49:19PM +0200, Neil Armstrong wrote:

> The Amlogic Meson SoCs embeds a specific Power Domain dedicated to the
> Video Processing Unit.
> This patch implements support for this power domain in preparation of the
> future support for the Video display support in U-Boot.
> 
> This driver will depend on changes in the clock driver to handle the setup
> of the VPU and VAPB clocks configured from DT using assigned-clocks entries.
> 
> Reviewed-by: Simon Glass <sjg@chromium.org>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

Applied to u-boot/master, thanks!

-- 
Tom
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[U-Boot, v2, u-boot, 2/2] clk: clk_meson: Add mux and div support for reparent and rate setting

[Tom Rini]

On Mon, Aug 06, 2018 at 02:49:20PM +0200, Neil Armstrong wrote:

> This patch adds support for :
> - Rate calculation through muxes and generic dividers
> - Basic gate setting propagation
> - Reparenting for muxes
> - Clock rate setting through generic dividers without reparenting
> 
> Support is only added to the Composite VPU and VAPB clocks in order
> to support the Video Processing Unit Power Domain clock setup.
> 
> Reviewed-by: Simon Glass <sjg@chromium.org>
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>

Applied to u-boot/master, thanks!

-- 
Tom
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