// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2021 Pengutronix , Lucas Stach < kernel @ pengutronix . de >
*/
#include <linux/bitfield.h>
#include <linux/device.h>
#include <linux/interconnect.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/clk.h>
#include <dt-bindings/power/imx8mm-power.h>
#include <dt-bindings/power/imx8mn-power.h>
#include <dt-bindings/power/imx8mp-power.h>
#include <dt-bindings/power/imx8mq-power.h>
#define BLK_SFT_RSTN 0 x0
#define BLK_CLK_EN 0 x4
#define BLK_MIPI_RESET_DIV 0 x8 /* Mini/Nano/Plus DISPLAY_BLK_CTRL only */
struct imx8m_blk_ctrl_domain;
struct imx8m_blk_ctrl {
struct device *dev;
struct notifier_block power_nb;
struct device *bus_power_dev;
struct regmap *regmap;
struct imx8m_blk_ctrl_domain *domains;
struct genpd_onecell_data onecell_data;
};
struct imx8m_blk_ctrl_domain_data {
const char *name;
const char * const *clk_names;
const char * const *path_names;
const char *gpc_name;
int num_clks;
int num_paths;
u32 rst_mask;
u32 clk_mask;
/*
* i . MX8M Mini , Nano and Plus have a third DISPLAY_BLK_CTRL register
* which is used to control the reset for the MIPI Phy .
* Since it ' s only present in certain circumstances ,
* an if - statement should be used before setting and clearing this
* register .
*/
u32 mipi_phy_rst_mask;
};
#define DOMAIN_MAX_CLKS 4
#define DOMAIN_MAX_PATHS 4
struct imx8m_blk_ctrl_domain {
struct generic_pm_domain genpd;
const struct imx8m_blk_ctrl_domain_data *data;
struct clk_bulk_data clks[DOMAIN_MAX_CLKS];
struct icc_bulk_data paths[DOMAIN_MAX_PATHS];
struct device *power_dev;
struct imx8m_blk_ctrl *bc;
int num_paths;
};
struct imx8m_blk_ctrl_data {
int max_reg;
notifier_fn_t power_notifier_fn;
const struct imx8m_blk_ctrl_domain_data *domains;
int num_domains;
};
static inline struct imx8m_blk_ctrl_domain *
to_imx8m_blk_ctrl_domain(struct generic_pm_domain *genpd)
{
return container_of(genpd, struct imx8m_blk_ctrl_domain, genpd);
}
static int imx8m_blk_ctrl_power_on(struct generic_pm_domain *genpd)
{
struct imx8m_blk_ctrl_domain *domain = to_imx8m_blk_ctrl_domain(genpd);
const struct imx8m_blk_ctrl_domain_data *data = domain->data;
struct imx8m_blk_ctrl *bc = domain->bc;
int ret;
/* make sure bus domain is awake */
ret = pm_runtime_get_sync(bc->bus_power_dev);
if (ret < 0 ) {
pm_runtime_put_noidle(bc->bus_power_dev);
dev_err(bc->dev, "failed to power up bus domain\n" );
return ret;
}
/* put devices into reset */
regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask);
if (data->mipi_phy_rst_mask)
regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask);
/* enable upstream and blk-ctrl clocks to allow reset to propagate */
ret = clk_bulk_prepare_enable(data->num_clks, domain->clks);
if (ret) {
dev_err(bc->dev, "failed to enable clocks\n" );
goto bus_put;
}
regmap_set_bits(bc->regmap, BLK_CLK_EN, data->clk_mask);
/* power up upstream GPC domain */
ret = pm_runtime_get_sync(domain->power_dev);
if (ret < 0 ) {
dev_err(bc->dev, "failed to power up peripheral domain\n" );
goto clk_disable;
}
/* wait for reset to propagate */
udelay(5 );
/* release reset */
regmap_set_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask);
if (data->mipi_phy_rst_mask)
regmap_set_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask);
ret = icc_bulk_set_bw(domain->num_paths, domain->paths);
if (ret)
dev_err(bc->dev, "failed to set icc bw\n" );
/* disable upstream clocks */
clk_bulk_disable_unprepare(data->num_clks, domain->clks);
return 0 ;
clk_disable:
clk_bulk_disable_unprepare(data->num_clks, domain->clks);
bus_put:
pm_runtime_put(bc->bus_power_dev);
return ret;
}
static int imx8m_blk_ctrl_power_off(struct generic_pm_domain *genpd)
{
struct imx8m_blk_ctrl_domain *domain = to_imx8m_blk_ctrl_domain(genpd);
const struct imx8m_blk_ctrl_domain_data *data = domain->data;
struct imx8m_blk_ctrl *bc = domain->bc;
/* put devices into reset and disable clocks */
if (data->mipi_phy_rst_mask)
regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_phy_rst_mask);
regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask);
regmap_clear_bits(bc->regmap, BLK_CLK_EN, data->clk_mask);
/* power down upstream GPC domain */
pm_runtime_put(domain->power_dev);
/* allow bus domain to suspend */
pm_runtime_put(bc->bus_power_dev);
return 0 ;
}
static struct lock_class_key blk_ctrl_genpd_lock_class;
static int imx8m_blk_ctrl_probe(struct platform_device *pdev)
{
const struct imx8m_blk_ctrl_data *bc_data;
struct device *dev = &pdev->dev;
struct imx8m_blk_ctrl *bc;
void __iomem *base;
int i, ret;
struct regmap_config regmap_config = {
.reg_bits = 32 ,
.val_bits = 32 ,
.reg_stride = 4 ,
};
bc = devm_kzalloc(dev, sizeof (*bc), GFP_KERNEL);
if (!bc)
return -ENOMEM;
bc->dev = dev;
bc_data = of_device_get_match_data(dev);
base = devm_platform_ioremap_resource(pdev, 0 );
if (IS_ERR(base))
return PTR_ERR(base);
regmap_config.max_register = bc_data->max_reg;
bc->regmap = devm_regmap_init_mmio(dev, base, ®map_config);
if (IS_ERR(bc->regmap))
return dev_err_probe(dev, PTR_ERR(bc->regmap),
"failed to init regmap\n" );
bc->domains = devm_kcalloc(dev, bc_data->num_domains,
sizeof (struct imx8m_blk_ctrl_domain),
GFP_KERNEL);
if (!bc->domains)
return -ENOMEM;
bc->onecell_data.num_domains = bc_data->num_domains;
bc->onecell_data.domains =
devm_kcalloc(dev, bc_data->num_domains,
sizeof (struct generic_pm_domain *), GFP_KERNEL);
if (!bc->onecell_data.domains)
return -ENOMEM;
bc->bus_power_dev = dev_pm_domain_attach_by_name(dev, "bus" );
if (IS_ERR(bc->bus_power_dev)) {
if (PTR_ERR(bc->bus_power_dev) == -ENODEV)
return dev_err_probe(dev, -EPROBE_DEFER,
"failed to attach power domain \" bus\"\n" );
else
return dev_err_probe(dev, PTR_ERR(bc->bus_power_dev),
"failed to attach power domain \" bus\"\n" );
}
for (i = 0 ; i < bc_data->num_domains; i++) {
const struct imx8m_blk_ctrl_domain_data *data = &bc_data->domains[i];
struct imx8m_blk_ctrl_domain *domain = &bc->domains[i];
int j;
domain->data = data;
domain->num_paths = data->num_paths;
for (j = 0 ; j < data->num_clks; j++)
domain->clks[j].id = data->clk_names[j];
for (j = 0 ; j < data->num_paths; j++) {
domain->paths[j].name = data->path_names[j];
/* Fake value for now, just let ICC could configure NoC mode/priority */
domain->paths[j].avg_bw = 1 ;
domain->paths[j].peak_bw = 1 ;
}
ret = devm_of_icc_bulk_get(dev, data->num_paths, domain->paths);
if (ret) {
if (ret != -EPROBE_DEFER) {
dev_warn_once(dev, "Could not get interconnect paths, NoC will stay unconfigured!\n" );
domain->num_paths = 0 ;
} else {
dev_err_probe(dev, ret, "failed to get noc entries\n" );
goto cleanup_pds;
}
}
ret = devm_clk_bulk_get(dev, data->num_clks, domain->clks);
if (ret) {
dev_err_probe(dev, ret, "failed to get clock\n" );
goto cleanup_pds;
}
domain->power_dev =
dev_pm_domain_attach_by_name(dev, data->gpc_name);
if (IS_ERR_OR_NULL(domain->power_dev)) {
if (!domain->power_dev)
ret = -ENODEV;
else
ret = PTR_ERR(domain->power_dev);
dev_err_probe(dev, ret,
"failed to attach power domain \" %s\"\n" ,
data->gpc_name);
goto cleanup_pds;
}
domain->genpd.name = data->name;
domain->genpd.power_on = imx8m_blk_ctrl_power_on;
domain->genpd.power_off = imx8m_blk_ctrl_power_off;
domain->bc = bc;
ret = pm_genpd_init(&domain->genpd, NULL, true );
if (ret) {
dev_err_probe(dev, ret,
"failed to init power domain \" %s\"\n" ,
data->gpc_name);
dev_pm_domain_detach(domain->power_dev, true );
goto cleanup_pds;
}
/*
* We use runtime PM to trigger power on / off of the upstream GPC
* domain , as a strict hierarchical parent / child power domain
* setup doesn ' t allow us to meet the sequencing requirements .
* This means we have nested locking of genpd locks , without the
* nesting being visible at the genpd level , so we need a
* separate lock class to make lockdep aware of the fact that
* this are separate domain locks that can be nested without a
* self - deadlock .
*/
lockdep_set_class(&domain->genpd.mlock,
&blk_ctrl_genpd_lock_class);
bc->onecell_data.domains[i] = &domain->genpd;
}
ret = of_genpd_add_provider_onecell(dev->of_node, &bc->onecell_data);
if (ret) {
dev_err_probe(dev, ret, "failed to add power domain provider\n" );
goto cleanup_pds;
}
bc->power_nb.notifier_call = bc_data->power_notifier_fn;
ret = dev_pm_genpd_add_notifier(bc->bus_power_dev, &bc->power_nb);
if (ret) {
dev_err_probe(dev, ret, "failed to add power notifier\n" );
goto cleanup_provider;
}
dev_set_drvdata(dev, bc);
ret = devm_of_platform_populate(dev);
if (ret)
goto cleanup_provider;
return 0 ;
cleanup_provider:
of_genpd_del_provider(dev->of_node);
cleanup_pds:
for (i--; i >= 0 ; i--) {
pm_genpd_remove(&bc->domains[i].genpd);
dev_pm_domain_detach(bc->domains[i].power_dev, true );
}
dev_pm_domain_detach(bc->bus_power_dev, true );
return ret;
}
static void imx8m_blk_ctrl_remove(struct platform_device *pdev)
{
struct imx8m_blk_ctrl *bc = dev_get_drvdata(&pdev->dev);
int i;
of_genpd_del_provider(pdev->dev.of_node);
for (i = 0 ; bc->onecell_data.num_domains; i++) {
struct imx8m_blk_ctrl_domain *domain = &bc->domains[i];
pm_genpd_remove(&domain->genpd);
dev_pm_domain_detach(domain->power_dev, true );
}
dev_pm_genpd_remove_notifier(bc->bus_power_dev);
dev_pm_domain_detach(bc->bus_power_dev, true );
}
#ifdef CONFIG_PM_SLEEP
static int imx8m_blk_ctrl_suspend(struct device *dev)
{
struct imx8m_blk_ctrl *bc = dev_get_drvdata(dev);
int ret, i;
/*
* This may look strange , but is done so the generic PM_SLEEP code
* can power down our domains and more importantly power them up again
* after resume , without tripping over our usage of runtime PM to
* control the upstream GPC domains . Things happen in the right order
* in the system suspend / resume paths due to the device parent / child
* hierarchy .
*/
ret = pm_runtime_get_sync(bc->bus_power_dev);
if (ret < 0 ) {
pm_runtime_put_noidle(bc->bus_power_dev);
return ret;
}
for (i = 0 ; i < bc->onecell_data.num_domains; i++) {
struct imx8m_blk_ctrl_domain *domain = &bc->domains[i];
ret = pm_runtime_get_sync(domain->power_dev);
if (ret < 0 ) {
pm_runtime_put_noidle(domain->power_dev);
goto out_fail;
}
}
return 0 ;
out_fail:
for (i--; i >= 0 ; i--)
pm_runtime_put(bc->domains[i].power_dev);
pm_runtime_put(bc->bus_power_dev);
return ret;
}
static int imx8m_blk_ctrl_resume(struct device *dev)
{
struct imx8m_blk_ctrl *bc = dev_get_drvdata(dev);
int i;
for (i = 0 ; i < bc->onecell_data.num_domains; i++)
pm_runtime_put(bc->domains[i].power_dev);
pm_runtime_put(bc->bus_power_dev);
return 0 ;
}
#endif
static const struct dev_pm_ops imx8m_blk_ctrl_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(imx8m_blk_ctrl_suspend, imx8m_blk_ctrl_resume)
};
static int imx8mm_vpu_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
power_nb);
if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
return NOTIFY_OK;
/*
* The ADB in the VPUMIX domain has no separate reset and clock
* enable bits , but is ungated together with the VPU clocks . To
* allow the handshake with the GPC to progress we put the VPUs
* in reset and ungate the clocks .
*/
regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, BIT(0 ) | BIT(1 ) | BIT(2 ));
regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0 ) | BIT(1 ) | BIT(2 ));
if (action == GENPD_NOTIFY_ON) {
/*
* On power up we have no software backchannel to the GPC to
* wait for the ADB handshake to happen , so we just delay for a
* bit . On power down the GPC driver waits for the handshake .
*/
udelay(5 );
/* set "fuse" bits to enable the VPUs */
regmap_set_bits(bc->regmap, 0 x8, 0 xffffffff);
regmap_set_bits(bc->regmap, 0 xc, 0 xffffffff);
regmap_set_bits(bc->regmap, 0 x10, 0 xffffffff);
regmap_set_bits(bc->regmap, 0 x14, 0 xffffffff);
}
return NOTIFY_OK;
}
static const struct imx8m_blk_ctrl_domain_data imx8mm_vpu_blk_ctl_domain_data[] = {
[IMX8MM_VPUBLK_PD_G1] = {
.name = "vpublk-g1" ,
.clk_names = (const char *[]){ "g1" , },
.num_clks = 1 ,
.gpc_name = "g1" ,
.rst_mask = BIT(1 ),
.clk_mask = BIT(1 ),
},
[IMX8MM_VPUBLK_PD_G2] = {
.name = "vpublk-g2" ,
.clk_names = (const char *[]){ "g2" , },
.num_clks = 1 ,
.gpc_name = "g2" ,
.rst_mask = BIT(0 ),
.clk_mask = BIT(0 ),
},
[IMX8MM_VPUBLK_PD_H1] = {
.name = "vpublk-h1" ,
.clk_names = (const char *[]){ "h1" , },
.num_clks = 1 ,
.gpc_name = "h1" ,
.rst_mask = BIT(2 ),
.clk_mask = BIT(2 ),
},
};
static const struct imx8m_blk_ctrl_data imx8mm_vpu_blk_ctl_dev_data = {
.max_reg = 0 x18,
.power_notifier_fn = imx8mm_vpu_power_notifier,
.domains = imx8mm_vpu_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mm_vpu_blk_ctl_domain_data),
};
static const struct imx8m_blk_ctrl_domain_data imx8mp_vpu_blk_ctl_domain_data[] = {
[IMX8MP_VPUBLK_PD_G1] = {
.name = "vpublk-g1" ,
.clk_names = (const char *[]){ "g1" , },
.num_clks = 1 ,
.gpc_name = "g1" ,
.rst_mask = BIT(1 ),
.clk_mask = BIT(1 ),
.path_names = (const char *[]){"g1" },
.num_paths = 1 ,
},
[IMX8MP_VPUBLK_PD_G2] = {
.name = "vpublk-g2" ,
.clk_names = (const char *[]){ "g2" , },
.num_clks = 1 ,
.gpc_name = "g2" ,
.rst_mask = BIT(0 ),
.clk_mask = BIT(0 ),
.path_names = (const char *[]){"g2" },
.num_paths = 1 ,
},
[IMX8MP_VPUBLK_PD_VC8000E] = {
.name = "vpublk-vc8000e" ,
.clk_names = (const char *[]){ "vc8000e" , },
.num_clks = 1 ,
.gpc_name = "vc8000e" ,
.rst_mask = BIT(2 ),
.clk_mask = BIT(2 ),
.path_names = (const char *[]){"vc8000e" },
.num_paths = 1 ,
},
};
static const struct imx8m_blk_ctrl_data imx8mp_vpu_blk_ctl_dev_data = {
.max_reg = 0 x18,
.power_notifier_fn = imx8mm_vpu_power_notifier,
.domains = imx8mp_vpu_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mp_vpu_blk_ctl_domain_data),
};
static int imx8mm_disp_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
power_nb);
if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
return NOTIFY_OK;
/* Enable bus clock and deassert bus reset */
regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(12 ));
regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(6 ));
/*
* On power up we have no software backchannel to the GPC to
* wait for the ADB handshake to happen , so we just delay for a
* bit . On power down the GPC driver waits for the handshake .
*/
if (action == GENPD_NOTIFY_ON)
udelay(5 );
return NOTIFY_OK;
}
static const struct imx8m_blk_ctrl_domain_data imx8mm_disp_blk_ctl_domain_data[] = {
[IMX8MM_DISPBLK_PD_CSI_BRIDGE] = {
.name = "dispblk-csi-bridge" ,
.clk_names = (const char *[]){ "csi-bridge-axi" , "csi-bridge-apb" ,
"csi-bridge-core" , },
.num_clks = 3 ,
.gpc_name = "csi-bridge" ,
.rst_mask = BIT(0 ) | BIT(1 ) | BIT(2 ),
.clk_mask = BIT(0 ) | BIT(1 ) | BIT(2 ) | BIT(3 ) | BIT(4 ) | BIT(5 ),
},
[IMX8MM_DISPBLK_PD_LCDIF] = {
.name = "dispblk-lcdif" ,
.clk_names = (const char *[]){ "lcdif-axi" , "lcdif-apb" , "lcdif-pix" , },
.num_clks = 3 ,
.gpc_name = "lcdif" ,
.clk_mask = BIT(6 ) | BIT(7 ),
},
[IMX8MM_DISPBLK_PD_MIPI_DSI] = {
.name = "dispblk-mipi-dsi" ,
.clk_names = (const char *[]){ "dsi-pclk" , "dsi-ref" , },
.num_clks = 2 ,
.gpc_name = "mipi-dsi" ,
.rst_mask = BIT(5 ),
.clk_mask = BIT(8 ) | BIT(9 ),
.mipi_phy_rst_mask = BIT(17 ),
},
[IMX8MM_DISPBLK_PD_MIPI_CSI] = {
.name = "dispblk-mipi-csi" ,
.clk_names = (const char *[]){ "csi-aclk" , "csi-pclk" },
.num_clks = 2 ,
.gpc_name = "mipi-csi" ,
.rst_mask = BIT(3 ) | BIT(4 ),
.clk_mask = BIT(10 ) | BIT(11 ),
.mipi_phy_rst_mask = BIT(16 ),
},
};
static const struct imx8m_blk_ctrl_data imx8mm_disp_blk_ctl_dev_data = {
.max_reg = 0 x2c,
.power_notifier_fn = imx8mm_disp_power_notifier,
.domains = imx8mm_disp_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mm_disp_blk_ctl_domain_data),
};
static int imx8mn_disp_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
power_nb);
if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
return NOTIFY_OK;
/* Enable bus clock and deassert bus reset */
regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(8 ));
regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(8 ));
/*
* On power up we have no software backchannel to the GPC to
* wait for the ADB handshake to happen , so we just delay for a
* bit . On power down the GPC driver waits for the handshake .
*/
if (action == GENPD_NOTIFY_ON)
udelay(5 );
return NOTIFY_OK;
}
static const struct imx8m_blk_ctrl_domain_data imx8mn_disp_blk_ctl_domain_data[] = {
[IMX8MN_DISPBLK_PD_MIPI_DSI] = {
.name = "dispblk-mipi-dsi" ,
.clk_names = (const char *[]){ "dsi-pclk" , "dsi-ref" , },
.num_clks = 2 ,
.gpc_name = "mipi-dsi" ,
.rst_mask = BIT(0 ) | BIT(1 ),
.clk_mask = BIT(0 ) | BIT(1 ),
.mipi_phy_rst_mask = BIT(17 ),
},
[IMX8MN_DISPBLK_PD_MIPI_CSI] = {
.name = "dispblk-mipi-csi" ,
.clk_names = (const char *[]){ "csi-aclk" , "csi-pclk" },
.num_clks = 2 ,
.gpc_name = "mipi-csi" ,
.rst_mask = BIT(2 ) | BIT(3 ),
.clk_mask = BIT(2 ) | BIT(3 ),
.mipi_phy_rst_mask = BIT(16 ),
},
[IMX8MN_DISPBLK_PD_LCDIF] = {
.name = "dispblk-lcdif" ,
.clk_names = (const char *[]){ "lcdif-axi" , "lcdif-apb" , "lcdif-pix" , },
.num_clks = 3 ,
.gpc_name = "lcdif" ,
.rst_mask = BIT(4 ) | BIT(5 ),
.clk_mask = BIT(4 ) | BIT(5 ),
},
[IMX8MN_DISPBLK_PD_ISI] = {
.name = "dispblk-isi" ,
.clk_names = (const char *[]){ "disp_axi" , "disp_apb" , "disp_axi_root" ,
"disp_apb_root" },
.num_clks = 4 ,
.gpc_name = "isi" ,
.rst_mask = BIT(6 ) | BIT(7 ),
.clk_mask = BIT(6 ) | BIT(7 ),
},
};
static const struct imx8m_blk_ctrl_data imx8mn_disp_blk_ctl_dev_data = {
.max_reg = 0 x84,
.power_notifier_fn = imx8mn_disp_power_notifier,
.domains = imx8mn_disp_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mn_disp_blk_ctl_domain_data),
};
#define LCDIF_ARCACHE_CTRL 0 x4c
#define LCDIF_1_RD_HURRY GENMASK(15 , 13 )
#define LCDIF_0_RD_HURRY GENMASK(12 , 10 )
#define ISI_CACHE_CTRL 0 x50
#define ISI_V_WR_HURRY GENMASK(28 , 26 )
#define ISI_U_WR_HURRY GENMASK(25 , 23 )
#define ISI_Y_WR_HURRY GENMASK(22 , 20 )
static int imx8mp_media_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
power_nb);
if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
return NOTIFY_OK;
/* Enable bus clock and deassert bus reset */
regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(8 ));
regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(8 ));
if (action == GENPD_NOTIFY_ON) {
/*
* On power up we have no software backchannel to the GPC to
* wait for the ADB handshake to happen , so we just delay for a
* bit . On power down the GPC driver waits for the handshake .
*/
udelay(5 );
/*
* Set panic read hurry level for both LCDIF interfaces to
* maximum priority to minimize chances of display FIFO
* underflow .
*/
regmap_set_bits(bc->regmap, LCDIF_ARCACHE_CTRL,
FIELD_PREP(LCDIF_1_RD_HURRY, 7 ) |
FIELD_PREP(LCDIF_0_RD_HURRY, 7 ));
/* Same here for ISI */
regmap_set_bits(bc->regmap, ISI_CACHE_CTRL,
FIELD_PREP(ISI_V_WR_HURRY, 7 ) |
FIELD_PREP(ISI_U_WR_HURRY, 7 ) |
FIELD_PREP(ISI_Y_WR_HURRY, 7 ));
}
return NOTIFY_OK;
}
/*
* From i . MX 8 M Plus Applications Processor Reference Manual , Rev . 1 ,
* section 13 . 2 . 2 , 13 . 2 . 3
* isp - ahb and dwe are not in Figure 13 - 5 . Media BLK_CTRL Clocks
*/
static const struct imx8m_blk_ctrl_domain_data imx8mp_media_blk_ctl_domain_data[] = {
[IMX8MP_MEDIABLK_PD_MIPI_DSI_1] = {
.name = "mediablk-mipi-dsi-1" ,
.clk_names = (const char *[]){ "apb" , "phy" , },
.num_clks = 2 ,
.gpc_name = "mipi-dsi1" ,
.rst_mask = BIT(0 ) | BIT(1 ),
.clk_mask = BIT(0 ) | BIT(1 ),
.mipi_phy_rst_mask = BIT(17 ),
},
[IMX8MP_MEDIABLK_PD_MIPI_CSI2_1] = {
.name = "mediablk-mipi-csi2-1" ,
.clk_names = (const char *[]){ "apb" , "cam1" },
.num_clks = 2 ,
.gpc_name = "mipi-csi1" ,
.rst_mask = BIT(2 ) | BIT(3 ),
.clk_mask = BIT(2 ) | BIT(3 ),
.mipi_phy_rst_mask = BIT(16 ),
},
[IMX8MP_MEDIABLK_PD_LCDIF_1] = {
.name = "mediablk-lcdif-1" ,
.clk_names = (const char *[]){ "disp1" , "apb" , "axi" , },
.num_clks = 3 ,
.gpc_name = "lcdif1" ,
.rst_mask = BIT(4 ) | BIT(5 ) | BIT(23 ),
.clk_mask = BIT(4 ) | BIT(5 ) | BIT(23 ),
.path_names = (const char *[]){"lcdif-rd" , "lcdif-wr" },
.num_paths = 2 ,
},
[IMX8MP_MEDIABLK_PD_ISI] = {
.name = "mediablk-isi" ,
.clk_names = (const char *[]){ "axi" , "apb" },
.num_clks = 2 ,
.gpc_name = "isi" ,
.rst_mask = BIT(6 ) | BIT(7 ),
.clk_mask = BIT(6 ) | BIT(7 ),
.path_names = (const char *[]){"isi0" , "isi1" , "isi2" },
.num_paths = 3 ,
},
[IMX8MP_MEDIABLK_PD_MIPI_CSI2_2] = {
.name = "mediablk-mipi-csi2-2" ,
.clk_names = (const char *[]){ "apb" , "cam2" },
.num_clks = 2 ,
.gpc_name = "mipi-csi2" ,
.rst_mask = BIT(9 ) | BIT(10 ),
.clk_mask = BIT(9 ) | BIT(10 ),
.mipi_phy_rst_mask = BIT(30 ),
},
[IMX8MP_MEDIABLK_PD_LCDIF_2] = {
.name = "mediablk-lcdif-2" ,
.clk_names = (const char *[]){ "disp2" , "apb" , "axi" , },
.num_clks = 3 ,
.gpc_name = "lcdif2" ,
.rst_mask = BIT(11 ) | BIT(12 ) | BIT(24 ),
.clk_mask = BIT(11 ) | BIT(12 ) | BIT(24 ),
.path_names = (const char *[]){"lcdif-rd" , "lcdif-wr" },
.num_paths = 2 ,
},
[IMX8MP_MEDIABLK_PD_ISP] = {
.name = "mediablk-isp" ,
.clk_names = (const char *[]){ "isp" , "axi" , "apb" },
.num_clks = 3 ,
.gpc_name = "isp" ,
.rst_mask = BIT(16 ) | BIT(17 ) | BIT(18 ),
.clk_mask = BIT(16 ) | BIT(17 ) | BIT(18 ),
.path_names = (const char *[]){"isp0" , "isp1" },
.num_paths = 2 ,
},
[IMX8MP_MEDIABLK_PD_DWE] = {
.name = "mediablk-dwe" ,
.clk_names = (const char *[]){ "axi" , "apb" },
.num_clks = 2 ,
.gpc_name = "dwe" ,
.rst_mask = BIT(19 ) | BIT(20 ) | BIT(21 ),
.clk_mask = BIT(19 ) | BIT(20 ) | BIT(21 ),
.path_names = (const char *[]){"dwe" },
.num_paths = 1 ,
},
[IMX8MP_MEDIABLK_PD_MIPI_DSI_2] = {
.name = "mediablk-mipi-dsi-2" ,
.clk_names = (const char *[]){ "phy" , },
.num_clks = 1 ,
.gpc_name = "mipi-dsi2" ,
.rst_mask = BIT(22 ),
.clk_mask = BIT(22 ),
.mipi_phy_rst_mask = BIT(29 ),
},
};
static const struct imx8m_blk_ctrl_data imx8mp_media_blk_ctl_dev_data = {
.max_reg = 0 x138,
.power_notifier_fn = imx8mp_media_power_notifier,
.domains = imx8mp_media_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mp_media_blk_ctl_domain_data),
};
static int imx8mq_vpu_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct imx8m_blk_ctrl *bc = container_of(nb, struct imx8m_blk_ctrl,
power_nb);
if (action != GENPD_NOTIFY_ON && action != GENPD_NOTIFY_PRE_OFF)
return NOTIFY_OK;
/*
* The ADB in the VPUMIX domain has no separate reset and clock
* enable bits , but is ungated and reset together with the VPUs . The
* reset and clock enable inputs to the ADB is a logical OR of the
* VPU bits . In order to set the G2 fuse bits , the G2 clock must
* also be enabled .
*/
regmap_set_bits(bc->regmap, BLK_SFT_RSTN, BIT(0 ) | BIT(1 ));
regmap_set_bits(bc->regmap, BLK_CLK_EN, BIT(0 ) | BIT(1 ));
if (action == GENPD_NOTIFY_ON) {
/*
* On power up we have no software backchannel to the GPC to
* wait for the ADB handshake to happen , so we just delay for a
* bit . On power down the GPC driver waits for the handshake .
*/
udelay(5 );
/* set "fuse" bits to enable the VPUs */
regmap_set_bits(bc->regmap, 0 x8, 0 xffffffff);
regmap_set_bits(bc->regmap, 0 xc, 0 xffffffff);
regmap_set_bits(bc->regmap, 0 x10, 0 xffffffff);
}
return NOTIFY_OK;
}
static const struct imx8m_blk_ctrl_domain_data imx8mq_vpu_blk_ctl_domain_data[] = {
[IMX8MQ_VPUBLK_PD_G1] = {
.name = "vpublk-g1" ,
.clk_names = (const char *[]){ "g1" , },
.num_clks = 1 ,
.gpc_name = "g1" ,
.rst_mask = BIT(1 ),
.clk_mask = BIT(1 ),
},
[IMX8MQ_VPUBLK_PD_G2] = {
.name = "vpublk-g2" ,
.clk_names = (const char *[]){ "g2" , },
.num_clks = 1 ,
.gpc_name = "g2" ,
.rst_mask = BIT(0 ),
.clk_mask = BIT(0 ),
},
};
static const struct imx8m_blk_ctrl_data imx8mq_vpu_blk_ctl_dev_data = {
.max_reg = 0 x14,
.power_notifier_fn = imx8mq_vpu_power_notifier,
.domains = imx8mq_vpu_blk_ctl_domain_data,
.num_domains = ARRAY_SIZE(imx8mq_vpu_blk_ctl_domain_data),
};
static const struct of_device_id imx8m_blk_ctrl_of_match[] = {
{
.compatible = "fsl,imx8mm-vpu-blk-ctrl" ,
.data = &imx8mm_vpu_blk_ctl_dev_data
}, {
.compatible = "fsl,imx8mm-disp-blk-ctrl" ,
.data = &imx8mm_disp_blk_ctl_dev_data
}, {
.compatible = "fsl,imx8mn-disp-blk-ctrl" ,
.data = &imx8mn_disp_blk_ctl_dev_data
}, {
.compatible = "fsl,imx8mp-media-blk-ctrl" ,
.data = &imx8mp_media_blk_ctl_dev_data
}, {
.compatible = "fsl,imx8mq-vpu-blk-ctrl" ,
.data = &imx8mq_vpu_blk_ctl_dev_data
}, {
.compatible = "fsl,imx8mp-vpu-blk-ctrl" ,
.data = &imx8mp_vpu_blk_ctl_dev_data
}, {
/* Sentinel */
}
};
MODULE_DEVICE_TABLE(of, imx8m_blk_ctrl_of_match);
static struct platform_driver imx8m_blk_ctrl_driver = {
.probe = imx8m_blk_ctrl_probe,
.remove = imx8m_blk_ctrl_remove,
.driver = {
.name = "imx8m-blk-ctrl" ,
.pm = &imx8m_blk_ctrl_pm_ops,
.of_match_table = imx8m_blk_ctrl_of_match,
.suppress_bind_attrs = true ,
},
};
module_platform_driver(imx8m_blk_ctrl_driver);
MODULE_LICENSE("GPL" );
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