diff options
Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r-- | drivers/acpi/scan.c | 95 |
1 files changed, 68 insertions, 27 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 02bb2cce423f..e6ed1ba91e5c 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1532,7 +1532,6 @@ int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map) r->cpu_start = rentry->res->start; r->dma_start = rentry->res->start - rentry->offset; r->size = resource_size(rentry->res); - r->offset = rentry->offset; r++; } } @@ -1562,8 +1561,7 @@ static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev) return fwspec ? fwspec->ops : NULL; } -static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, - const u32 *id_in) +static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) { int err; const struct iommu_ops *ops; @@ -1577,7 +1575,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, ops = acpi_iommu_fwspec_ops(dev); if (ops) { mutex_unlock(&iommu_probe_device_lock); - return ops; + return 0; } err = iort_iommu_configure_id(dev, id_in); @@ -1594,12 +1592,14 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, /* Ignore all other errors apart from EPROBE_DEFER */ if (err == -EPROBE_DEFER) { - return ERR_PTR(err); + return err; } else if (err) { dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); - return NULL; + return -ENODEV; } - return acpi_iommu_fwspec_ops(dev); + if (!acpi_iommu_fwspec_ops(dev)) + return -ENODEV; + return 0; } #else /* !CONFIG_IOMMU_API */ @@ -1611,10 +1611,9 @@ int acpi_iommu_fwspec_init(struct device *dev, u32 id, return -ENODEV; } -static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, - const u32 *id_in) +static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) { - return NULL; + return -ENODEV; } #endif /* !CONFIG_IOMMU_API */ @@ -1628,7 +1627,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, const u32 *input_id) { - const struct iommu_ops *iommu; + int ret; if (attr == DEV_DMA_NOT_SUPPORTED) { set_dma_ops(dev, &dma_dummy_ops); @@ -1637,12 +1636,16 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, acpi_arch_dma_setup(dev); - iommu = acpi_iommu_configure_id(dev, input_id); - if (PTR_ERR(iommu) == -EPROBE_DEFER) + ret = acpi_iommu_configure_id(dev, input_id); + if (ret == -EPROBE_DEFER) return -EPROBE_DEFER; - arch_setup_dma_ops(dev, 0, U64_MAX, - iommu, attr == DEV_DMA_COHERENT); + /* + * Historically this routine doesn't fail driver probing due to errors + * in acpi_iommu_configure_id() + */ + + arch_setup_dma_ops(dev, 0, U64_MAX, attr == DEV_DMA_COHERENT); return 0; } @@ -1732,6 +1735,7 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device) * Some ACPI devs contain SerialBus resources even though they are not * attached to a serial bus at all. */ + {ACPI_VIDEO_HID, }, {"MSHW0028", }, /* * HIDs of device with an UartSerialBusV2 resource for which userspace @@ -1981,10 +1985,9 @@ static void acpi_scan_init_hotplug(struct acpi_device *adev) } } -static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) +static u32 acpi_scan_check_dep(acpi_handle handle) { struct acpi_handle_list dep_devices; - acpi_status status; u32 count; int i; @@ -1994,12 +1997,10 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) * 2. ACPI nodes describing USB ports. * Still, checking for _HID catches more then just these cases ... */ - if (!check_dep || !acpi_has_method(handle, "_DEP") || - !acpi_has_method(handle, "_HID")) + if (!acpi_has_method(handle, "_DEP") || !acpi_has_method(handle, "_HID")) return 0; - status = acpi_evaluate_reference(handle, "_DEP", NULL, &dep_devices); - if (ACPI_FAILURE(status)) { + if (!acpi_evaluate_reference(handle, "_DEP", NULL, &dep_devices)) { acpi_handle_debug(handle, "Failed to evaluate _DEP.\n"); return 0; } @@ -2008,6 +2009,7 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) struct acpi_device_info *info; struct acpi_dep_data *dep; bool skip, honor_dep; + acpi_status status; status = acpi_get_object_info(dep_devices.handles[i], &info); if (ACPI_FAILURE(status)) { @@ -2041,7 +2043,13 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep) return count; } -static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, +static acpi_status acpi_scan_check_crs_csi2_cb(acpi_handle handle, u32 a, void *b, void **c) +{ + acpi_mipi_check_crs_csi2(handle); + return AE_OK; +} + +static acpi_status acpi_bus_check_add(acpi_handle handle, bool first_pass, struct acpi_device **adev_p) { struct acpi_device *device = acpi_fetch_acpi_dev(handle); @@ -2059,9 +2067,25 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, if (acpi_device_should_be_hidden(handle)) return AE_OK; - /* Bail out if there are dependencies. */ - if (acpi_scan_check_dep(handle, check_dep) > 0) - return AE_CTRL_DEPTH; + if (first_pass) { + acpi_mipi_check_crs_csi2(handle); + + /* Bail out if there are dependencies. */ + if (acpi_scan_check_dep(handle) > 0) { + /* + * The entire CSI-2 connection graph needs to be + * extracted before any drivers or scan handlers + * are bound to struct device objects, so scan + * _CRS CSI-2 resource descriptors for all + * devices below the current handle. + */ + acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, + ACPI_UINT32_MAX, + acpi_scan_check_crs_csi2_cb, + NULL, NULL, NULL); + return AE_CTRL_DEPTH; + } + } fallthrough; case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ @@ -2084,10 +2108,10 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep, } /* - * If check_dep is true at this point, the device has no dependencies, + * If first_pass is true at this point, the device has no dependencies, * or the creation of the device object would have been postponed above. */ - acpi_add_single_object(&device, handle, type, !check_dep); + acpi_add_single_object(&device, handle, type, !first_pass); if (!device) return AE_CTRL_DEPTH; @@ -2431,6 +2455,13 @@ static void acpi_scan_postponed_branch(acpi_handle handle) acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, acpi_bus_check_add_2, NULL, NULL, (void **)&adev); + + /* + * Populate the ACPI _CRS CSI-2 software nodes for the ACPI devices that + * have been added above. + */ + acpi_mipi_init_crs_csi2_swnodes(); + acpi_bus_attach(adev, NULL); } @@ -2499,12 +2530,22 @@ int acpi_bus_scan(acpi_handle handle) if (!device) return -ENODEV; + /* + * Set up ACPI _CRS CSI-2 software nodes using information extracted + * from the _CRS CSI-2 resource descriptors during the ACPI namespace + * walk above and MIPI DisCo for Imaging device properties. + */ + acpi_mipi_scan_crs_csi2(); + acpi_mipi_init_crs_csi2_swnodes(); + acpi_bus_attach(device, (void *)true); /* Pass 2: Enumerate all of the remaining devices. */ acpi_scan_postponed(); + acpi_mipi_crs_csi2_cleanup(); + return 0; } EXPORT_SYMBOL(acpi_bus_scan); |