This block delivers power and clocks to the whole display and rendering pipeline.
Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com --- drivers/power/domain/Kconfig | 7 + drivers/power/domain/Makefile | 1 + drivers/power/domain/imx8mp-mediamix.c | 185 +++++++++++++++++++++++++ 3 files changed, 193 insertions(+) create mode 100644 drivers/power/domain/imx8mp-mediamix.c
diff --git a/drivers/power/domain/Kconfig b/drivers/power/domain/Kconfig index bd82d2f7044..5f5218bd8b5 100644 --- a/drivers/power/domain/Kconfig +++ b/drivers/power/domain/Kconfig @@ -47,6 +47,13 @@ config IMX8MP_HSIOMIX_BLKCTRL help Enable support for manipulating NXP i.MX8MP on-SoC HSIOMIX block controller.
+config IMX8MP_MEDIAMIX_BLKCTRL + bool "Enable i.MX8MP MEDIAMIX domain driver" + depends on POWER_DOMAIN && IMX8MP + select CLK + help + Enable support for manipulating NXP i.MX8MP on-SoC MEDIAMIX block controller. + config MTK_POWER_DOMAIN bool "Enable the MediaTek power domain driver" depends on POWER_DOMAIN && ARCH_MEDIATEK diff --git a/drivers/power/domain/Makefile b/drivers/power/domain/Makefile index 2daab73eb75..4e45b6bb3aa 100644 --- a/drivers/power/domain/Makefile +++ b/drivers/power/domain/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_BCM6328_POWER_DOMAIN) += bcm6328-power-domain.o obj-$(CONFIG_IMX8_POWER_DOMAIN) += imx8-power-domain-legacy.o imx8-power-domain.o obj-$(CONFIG_IMX8M_POWER_DOMAIN) += imx8m-power-domain.o obj-$(CONFIG_IMX8MP_HSIOMIX_BLKCTRL) += imx8mp-hsiomix.o +obj-$(CONFIG_IMX8MP_MEDIAMIX_BLKCTRL) += imx8mp-mediamix.o obj-$(CONFIG_MTK_POWER_DOMAIN) += mtk-power-domain.o obj-$(CONFIG_MESON_GX_VPU_POWER_DOMAIN) += meson-gx-pwrc-vpu.o obj-$(CONFIG_MESON_EE_POWER_DOMAIN) += meson-ee-pwrc.o diff --git a/drivers/power/domain/imx8mp-mediamix.c b/drivers/power/domain/imx8mp-mediamix.c new file mode 100644 index 00000000000..63079ff3430 --- /dev/null +++ b/drivers/power/domain/imx8mp-mediamix.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * i.MX8 MEDIAMIX control block driver + * Copyright (C) 2024 Miquel Raynal miquel.raynal@bootlin.com + * Inspired from Marek Vasut marex@denx.de work on the hsiomix driver. + */ + +#include <asm/io.h> +#include <clk.h> +#include <dm.h> +#include <power-domain-uclass.h> +#include <linux/delay.h> + +#include <dt-bindings/power/imx8mp-power.h> + +#define BLK_SFT_RSTN 0x0 +#define BLK_CLK_EN 0x4 + +struct imx8mp_mediamix_priv { + void __iomem *base; + struct clk clk_apb; + struct clk clk_axi; + struct clk clk_disp2; + struct power_domain pd_bus; + struct power_domain pd_lcdif2; +}; + +static int imx8mp_mediamix_on(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct imx8mp_mediamix_priv *priv = dev_get_priv(dev); + struct power_domain *domain; + struct clk *clk; + u32 reset; + int ret; + + switch (power_domain->id) { + case IMX8MP_MEDIABLK_PD_LCDIF_2: + domain = &priv->pd_lcdif2; + clk = &priv->clk_disp2; + reset = BIT(11) | BIT(12) | BIT(24); + break; + default: + return -EINVAL; + } + + /* Make sure bus domain is awake */ + ret = power_domain_on(&priv->pd_bus); + if (ret) + return ret; + + /* Put devices into reset */ + clrbits_le32(priv->base + BLK_SFT_RSTN, reset); + + /* Enable upstream clocks */ + ret = clk_enable(&priv->clk_apb); + if (ret) + goto dis_bus_pd; + + ret = clk_enable(&priv->clk_axi); + if (ret) + goto dis_bus_pd; + + /* Enable blk-ctrl clock to allow reset to propagate */ + ret = clk_enable(clk); + if (ret) + goto dis_bus_pd; + setbits_le32(priv->base + BLK_CLK_EN, reset); + + /* Power up upstream GPC domain */ + ret = power_domain_on(domain); + if (ret) + goto dis_bus_pd; + + /* Wait for reset to propagate */ + udelay(5); + + /* Release reset */ + setbits_le32(priv->base + BLK_SFT_RSTN, reset); + + return 0; + +dis_bus_pd: + power_domain_off(&priv->pd_bus); + + return ret; +} + +static int imx8mp_mediamix_off(struct power_domain *power_domain) +{ + struct udevice *dev = power_domain->dev; + struct imx8mp_mediamix_priv *priv = dev_get_priv(dev); + struct power_domain *domain; + u32 reset; + + switch (power_domain->id) { + case IMX8MP_MEDIABLK_PD_LCDIF_2: + domain = &priv->pd_lcdif2; + reset = BIT(11) | BIT(12) | BIT(24); + break; + default: + return -EINVAL; + } + + /* Put devices into reset and disable clocks */ + clrbits_le32(priv->base + BLK_SFT_RSTN, reset); + clrbits_le32(priv->base + BLK_CLK_EN, reset); + + /* Power down upstream GPC domain */ + power_domain_off(domain); + + /* Allow bus domain to suspend */ + power_domain_off(&priv->pd_bus); + + return 0; +} + +static int imx8mp_mediamix_of_xlate(struct power_domain *power_domain, + struct ofnode_phandle_args *args) +{ + power_domain->id = args->args[0]; + + return 0; +} + +static int imx8mp_mediamix_bind(struct udevice *dev) +{ + /* Bind child lcdif */ + return dm_scan_fdt_dev(dev); +} + +static int imx8mp_mediamix_probe(struct udevice *dev) +{ + struct imx8mp_mediamix_priv *priv = dev_get_priv(dev); + int ret; + + priv->base = dev_read_addr_ptr(dev); + + ret = clk_get_by_name(dev, "apb", &priv->clk_apb); + if (ret < 0) + return ret; + + ret = clk_get_by_name(dev, "axi", &priv->clk_axi); + if (ret < 0) + return ret; + + ret = clk_get_by_name(dev, "disp2", &priv->clk_disp2); + if (ret < 0) + return ret; + + ret = power_domain_get_by_name(dev, &priv->pd_bus, "bus"); + if (ret < 0) + return ret; + + ret = power_domain_get_by_name(dev, &priv->pd_lcdif2, "lcdif2"); + if (ret < 0) + goto free_bus_pd; + + return 0; + +free_bus_pd: + power_domain_free(&priv->pd_bus); + return ret; +} + +static const struct udevice_id imx8mp_mediamix_ids[] = { + { .compatible = "fsl,imx8mp-media-blk-ctrl" }, + { } +}; + +struct power_domain_ops imx8mp_mediamix_ops = { + .on = imx8mp_mediamix_on, + .off = imx8mp_mediamix_off, + .of_xlate = imx8mp_mediamix_of_xlate, +}; + +U_BOOT_DRIVER(imx8mp_mediamix) = { + .name = "imx8mp_mediamix", + .id = UCLASS_POWER_DOMAIN, + .of_match = imx8mp_mediamix_ids, + .bind = imx8mp_mediamix_bind, + .probe = imx8mp_mediamix_probe, + .priv_auto = sizeof(struct imx8mp_mediamix_priv), + .ops = &imx8mp_mediamix_ops, +};