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This ensures the > shared bits are properly managed and not disabled while still in use. > > Fixes: e9aa77d413c9 ("soc: imx: add i.MX93 media blk ctrl driver") > Cc: stable@vger.kernel.org > Signed-off-by: Guoniu Zhou > --- Reviewed-by: Frank Li > drivers/pmdomain/imx/imx93-blk-ctrl.c | 60 +++++++++++++++++++++++++++++++++-- > 1 file changed, 58 insertions(+), 2 deletions(-) > > diff --git a/drivers/pmdomain/imx/imx93-blk-ctrl.c b/drivers/pmdomain/imx/imx93-blk-ctrl.c > index 1afc78b034fa..243ce939ba68 100644 > --- a/drivers/pmdomain/imx/imx93-blk-ctrl.c > +++ b/drivers/pmdomain/imx/imx93-blk-ctrl.c > @@ -48,6 +48,8 @@ > > #define PRIO(X) (X) > > +#define BLK_CTRL_NO_PARENT UINT_MAX > + > struct imx93_blk_ctrl_domain; > > struct imx93_blk_ctrl { > @@ -68,12 +70,18 @@ struct imx93_blk_ctrl_qos { > u32 cfg_prio; > }; > > +struct imx93_blk_ctrl_subdomain_link { > + struct generic_pm_domain *parent; > + struct generic_pm_domain *subdomain; > +}; > + > struct imx93_blk_ctrl_domain_data { > const char *name; > const char * const *clk_names; > int num_clks; > u32 rst_mask; > u32 clk_mask; > + u32 parent; > int num_qos; > struct imx93_blk_ctrl_qos qos[DOMAIN_MAX_QOS]; > }; > @@ -203,6 +211,13 @@ static void imx93_release_pm_genpd(void *data) > pm_genpd_remove(genpd); > } > > +static void imx93_release_subdomain(void *data) > +{ > + struct imx93_blk_ctrl_subdomain_link *link = data; > + > + pm_genpd_remove_subdomain(link->parent, link->subdomain); > +} > + > static struct lock_class_key blk_ctrl_genpd_lock_class; > > static int imx93_blk_ctrl_probe(struct platform_device *pdev) > @@ -302,6 +317,34 @@ static int imx93_blk_ctrl_probe(struct platform_device *pdev) > bc->onecell_data.domains[i] = &domain->genpd; > } > > + for (i = 0; i < bc_data->num_domains; i++) { > + struct imx93_blk_ctrl_domain *domain = &bc->domains[i]; > + const struct imx93_blk_ctrl_domain_data *data = domain->data; > + struct imx93_blk_ctrl_subdomain_link *link; > + > + if (bc_data->skip_mask & BIT(i) || > + data->parent == BLK_CTRL_NO_PARENT) > + continue; > + > + link = devm_kzalloc(dev, sizeof(*link), GFP_KERNEL); > + if (!link) > + return -ENOMEM; > + > + link->parent = &bc->domains[data->parent].genpd; > + link->subdomain = &domain->genpd; > + > + ret = pm_genpd_add_subdomain(&bc->domains[data->parent].genpd, > + &domain->genpd); > + if (ret) > + return dev_err_probe(dev, ret, "failed to add subdomain %s\n", > + domain->genpd.name); > + > + ret = devm_add_action_or_reset(dev, imx93_release_subdomain, link); > + if (ret) > + return dev_err_probe(dev, ret, > + "failed to add subdomain release callback\n"); > + } > + > ret = devm_pm_runtime_enable(dev); > if (ret) > return dev_err_probe(dev, ret, "failed to enable pm-runtime\n"); > @@ -326,8 +369,9 @@ static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_domain_data[] > .name = "mediablk-mipi-dsi", > .clk_names = (const char *[]){ "dsi" }, > .num_clks = 1, > - .rst_mask = BIT(11) | BIT(12), > - .clk_mask = BIT(11) | BIT(12), > + .rst_mask = BIT(11), > + .clk_mask = BIT(11), > + .parent = IMX93_MEDIABLK_PD_MIPI_PHY, > }, > [IMX93_MEDIABLK_PD_MIPI_CSI] = { > .name = "mediablk-mipi-csi", > @@ -335,6 +379,7 @@ static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_domain_data[] > .num_clks = 2, > .rst_mask = BIT(9) | BIT(10), > .clk_mask = BIT(9) | BIT(10), > + .parent = IMX93_MEDIABLK_PD_MIPI_PHY, > }, > [IMX93_MEDIABLK_PD_PXP] = { > .name = "mediablk-pxp", > @@ -342,6 +387,7 @@ static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_domain_data[] > .num_clks = 1, > .rst_mask = BIT(7) | BIT(8), > .clk_mask = BIT(7) | BIT(8), > + .parent = BLK_CTRL_NO_PARENT, > .num_qos = 2, > .qos = { > { > @@ -363,6 +409,7 @@ static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_domain_data[] > .num_clks = 2, > .rst_mask = BIT(4) | BIT(5) | BIT(6), > .clk_mask = BIT(4) | BIT(5) | BIT(6), > + .parent = BLK_CTRL_NO_PARENT, > .num_qos = 1, > .qos = { > { > @@ -379,6 +426,7 @@ static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_domain_data[] > .num_clks = 1, > .rst_mask = BIT(2) | BIT(3), > .clk_mask = BIT(2) | BIT(3), > + .parent = BLK_CTRL_NO_PARENT, > .num_qos = 4, > .qos = { > { > @@ -404,6 +452,14 @@ static const struct imx93_blk_ctrl_domain_data imx93_media_blk_ctl_domain_data[] > } > } > }, > + [IMX93_MEDIABLK_PD_MIPI_PHY] = { > + .name = "mediablk-mipi-phy", > + .clk_names = NULL, > + .num_clks = 0, > + .rst_mask = BIT(12), > + .clk_mask = BIT(12), > + .parent = BLK_CTRL_NO_PARENT, > + }, > }; > > static const struct regmap_range imx93_media_blk_ctl_yes_ranges[] = { > > -- > 2.34.1 > >