Re: [PATCH V7 4/4] soc: imx: Add blk-ctl driver for i.MX8MM

From: Adam Ford
Date: Mon Jun 14 2021 - 14:08:07 EST

On Sat, Jun 12, 2021 at 7:58 AM Peng Fan (OSS) <peng.fan@xxxxxxxxxxx> wrote:
>
> From: Peng Fan <peng.fan@xxxxxxx>
>
> The i.MX8MM SoC has dispmix BLK-CTL and vpumix BLK-CTL, so we add
> that support in this driver.
>
> Reviewed-by: Abel Vesa <abel.vesa@xxxxxxx>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>

Maybe my TF-A is too old, but I am not able to wake the device from
suspend-to-ram with this series. I used the device tree from [1] to
enable both the GPCv2 and the blk-ctl stuff.

[1] - https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210604111005.6804-1-peng.fan@xxxxxxxxxxx/

I based both off Shawn's for-next branch.

adam

> ---
> drivers/soc/imx/Makefile | 2 +-
> drivers/soc/imx/blk-ctl-imx8mm.c | 139 +++++++++++++++++++++++++++++++
> 2 files changed, 140 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..59443588f892
> --- /dev/null
> +++ b/drivers/soc/imx/blk-ctl-imx8mm.c
> @@ -0,0 +1,139 @@
> +// 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", NULL, IMX8MM_BLK_CTL_PD_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", NULL, IMX8MM_BLK_CTL_PD_DISPMIX_LCDIF, 0x4,
> + MEDIA_BLK_LCDIF_PD_MASK, -1, -1, 0),
> + IMX_BLK_CTL_PD("MIPI_DSI", "mipi", IMX8MM_BLK_CTL_PD_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_PD_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),
> + IMX_BLK_CTL_PD("DISPMIX_BUS", "dispmix", IMX8MM_BLK_CTL_PD_DISPMIX_BUS, 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)
> +};
> +
> +static struct imx_blk_ctl_hw imx8mm_vpumix_blk_ctl_pds[] = {
> + IMX_BLK_CTL_PD("VPU_BLK_CTL_G2", "vpu-g2", IMX8MM_BLK_CTL_PD_VPU_G2, 0x4,
> + BIT(0), 0, BIT(0), IMX_BLK_CTL_PD_RESET),
> + IMX_BLK_CTL_PD("VPU_BLK_CTL_G1", "vpu-g1", IMX8MM_BLK_CTL_PD_VPU_G1, 0x4,
> + BIT(1), 0, BIT(1), IMX_BLK_CTL_PD_RESET),
> + IMX_BLK_CTL_PD("VPU_BLK_CTL_H1", "vpu-h1", IMX8MM_BLK_CTL_PD_VPU_H1, 0x4,
> + BIT(2), 0, BIT(2), IMX_BLK_CTL_PD_RESET),
> + IMX_BLK_CTL_PD("VPU_BLK_CTL_BUS", "vpumix", IMX8MM_BLK_CTL_PD_VPU_BUS, 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),
> + .max_num = IMX8MM_BLK_CTL_PD_VPU_MAX,
> + .hw_hsk = &imx8mm_vpumix_blk_ctl_pds[3],
> + .config = imx8mm_blk_ctl_regmap_config,
> + .name = "imx-vpumix-blk-ctl",
> +};
> +
> +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),
> + .max_num = IMX8MM_BLK_CTL_PD_DISPMIX_MAX,
> + .hw_hsk = &imx8mm_dispmix_blk_ctl_pds[4],
> + .config = imx8mm_blk_ctl_regmap_config,
> + .name = "imx-dispmix-blk-ctl",
> +};
> +
> +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;
> + 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
>