> Subject: Re: [PATCH V7 4/4] soc: imx: Add blk-ctl driver for i.MX8MM > > On Tue, Jun 15, 2021 at 6:05 AM Peng Fan (OSS) <peng.fan@xxxxxxxxxxx> > wrote: > > > > > > On 2021/6/15 3:29, Adam Ford wrote: > > > On Mon, Jun 14, 2021 at 1:07 PM Adam Ford <aford173@xxxxxxxxx> > wrote: > > >> > > >> 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://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fp > > >> > atchwork.kernel.org%2Fproject%2Flinux-arm-kernel%2Fpatch%2F20210604 > > >> > 111005.6804-1-peng.fan%40oss.nxp.com%2F&data=04%7C01%7Cpeng. > fan > > >> %40nxp.com%7C29fe5fa2af704121c2d508d930b25126%7C686ea1d3bc > 2b4c6fa92 > > >> > cd99c5c301635%7C0%7C0%7C637594364693096718%7CUnknown%7CTWF > pbGZsb3d8 > > >> > eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3 > D% > > >> > 7C1000&sdata=owV810qvJWHnaoav%2BZDlpd%2FmjALiZkk0uWM44gqj > jQ8%3D > > >> &reserved=0 > > >> > > >> I based both off Shawn's for-next branch. > > > > > > I tried to enable USB with the GPCv2 stuff pulled into Shawn's > > > for-next branch, and my board hangs when USB is loaded, but USB > > > doesn't use blk-ctl, it just uses GPCv2. > > > > > > I looked at some of the changes with GPCv2, and I noticed a comment > > > in the GPCv2 function called imx_pgc_power_up. The comment reads: > > > > > > /* > > > * ret = regmap_read_poll_timeout(domain->regmap, GPC_PU_PWRHSK, > reg_val, > > > * (reg_val & domain->bits.hskack), 0, > > > * USEC_PER_MSEC); > > > * Technically we need the commented code to wait handshake. But that > > > needs > > > * the BLK-CTL module BUS clk-en bit being set. > > > * > > > * There is a separate BLK-CTL module and we will have such a driver > > > for it, > > > * that driver will set the BUS clk-en bit and handshake will be > > > triggered > > > * automatically there. Just add a delay and suppose the handshake > > > finish > > > * after that. > > > */ > > > > > > I didn't see a delay here despite the comment saying we should add one. > > > > > > With the blk-ctl enabled, I attempted to uncomment the above line of > > > code without much success in preventing the board from hanging. > > > > > > If BUS clk-en bit needs to be set in order for the handshake to > > > work, should all these power domains reference it to bring it up? > > > If we decide against using the BUS clk-en bit, what should this delay be? > > > > It is only for power domain has mix and need delay for the handshake. > > USB no need that handshake. > > Don't the OTG domains depend on hsiomix? Sorry, I mean hsiomix has no blkctl. It no need handshake and no pu for hsiomix. > > > > > Could you post a github branch, then I could give a look? > > No problem. I'll give a try. Per my try, I tested VPU/DISP which are complicated cases, for usb, actually it has nothing to do with blk-ctl, it should be gpcv2 handling has issue. Thanks, Peng. > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub. > com%2Faford173%2Flinux%2Ftree%2Ffor-next&data=04%7C01%7Cpen > g.fan%40nxp.com%7C29fe5fa2af704121c2d508d930b25126%7C686ea1d3bc > 2b4c6fa92cd99c5c301635%7C0%7C0%7C637594364693106714%7CUnknow > n%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1ha > WwiLCJXVCI6Mn0%3D%7C1000&sdata=6tiEiL7TMioVeb88WKHTYxVPxE > MT1pboN%2FSMxiKA1yM%3D&reserved=0 > > thanks > > adam > > > > > Thanks, > > Peng. > > > > > > > > adam > > >> > > >> 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 > > >>>
