X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Facpi%2Fscan.c;h=2649a068671d3914d5f1eae97e4d91b1c2c56ed1;hb=0c76c6ba246043bbc5c0f9620a0645ae78217421;hp=03141aa4ea9500bce3a973605ecbf203af96a060;hpb=86579aa470dee9c6038ac4adf0f8c4863a215865;p=firefly-linux-kernel-4.4.55.git diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 03141aa4ea95..2649a068671d 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -11,6 +11,7 @@ #include #include #include +#include #include @@ -135,12 +136,13 @@ static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias, struct acpi_hardware_id *id; /* - * Since we skip PRP0001 from the modalias below, 0 should be returned - * if PRP0001 is the only ACPI/PNP ID in the device's list. + * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should + * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the + * device's list. */ count = 0; list_for_each_entry(id, &acpi_dev->pnp.ids, list) - if (strcmp(id->id, "PRP0001")) + if (strcmp(id->id, ACPI_DT_NAMESPACE_HID)) count++; if (!count) @@ -153,7 +155,7 @@ static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias, size -= len; list_for_each_entry(id, &acpi_dev->pnp.ids, list) { - if (!strcmp(id->id, "PRP0001")) + if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID)) continue; count = snprintf(&modalias[len], size, "%s:", id->id); @@ -177,7 +179,8 @@ static int create_pnp_modalias(struct acpi_device *acpi_dev, char *modalias, * @size: Size of the buffer. * * Expose DT compatible modalias as of:NnameTCcompatible. This function should - * only be called for devices having PRP0001 in their list of ACPI/PNP IDs. + * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of + * ACPI/PNP IDs. */ static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias, int size) @@ -980,9 +983,9 @@ static void acpi_device_remove_files(struct acpi_device *dev) * @adev: ACPI device object to match. * @of_match_table: List of device IDs to match against. * - * If @dev has an ACPI companion which has the special PRP0001 device ID in its - * list of identifiers and a _DSD object with the "compatible" property, use - * that property to match against the given list of identifiers. + * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of + * identifiers and a _DSD object with the "compatible" property, use that + * property to match against the given list of identifiers. */ static bool acpi_of_match_device(struct acpi_device *adev, const struct of_device_id *of_match_table) @@ -1038,14 +1041,14 @@ static const struct acpi_device_id *__acpi_match_device( return id; /* - * Next, check the special "PRP0001" ID and try to match the + * Next, check ACPI_DT_NAMESPACE_HID and try to match the * "compatible" property if found. * * The id returned by the below is not valid, but the only * caller passing non-NULL of_ids here is only interested in * whether or not the return value is NULL. */ - if (!strcmp("PRP0001", hwid->id) + if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id) && acpi_of_match_device(device, of_ids)) return id; } @@ -1671,7 +1674,7 @@ static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, static void acpi_wakeup_gpe_init(struct acpi_device *device) { - struct acpi_device_id button_device_ids[] = { + static const struct acpi_device_id button_device_ids[] = { {"PNP0C0C", 0}, {"PNP0C0D", 0}, {"PNP0C0E", 0}, @@ -1766,15 +1769,9 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state) if (acpi_has_method(device->handle, pathname)) ps->flags.explicit_set = 1; - /* - * State is valid if there are means to put the device into it. - * D3hot is only valid if _PR3 present. - */ - if (!list_empty(&ps->resources) - || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { + /* State is valid if there are means to put the device into it. */ + if (!list_empty(&ps->resources) || ps->flags.explicit_set) ps->flags.valid = 1; - ps->flags.os_accessible = 1; - } ps->power = -1; /* Unknown - driver assigned */ ps->latency = -1; /* Unknown - driver assigned */ @@ -1810,21 +1807,13 @@ static void acpi_bus_get_power_flags(struct acpi_device *device) acpi_bus_init_power_state(device, i); INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); + if (!list_empty(&device->power.states[ACPI_STATE_D3_HOT].resources)) + device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; - /* Set defaults for D0 and D3 states (always valid) */ + /* Set defaults for D0 and D3hot states (always valid) */ device->power.states[ACPI_STATE_D0].flags.valid = 1; device->power.states[ACPI_STATE_D0].power = 100; - device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1; - device->power.states[ACPI_STATE_D3_COLD].power = 0; - - /* Set D3cold's explicit_set flag if _PS3 exists. */ - if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) - device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; - - /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ - if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || - device->power.flags.power_resources) - device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; + device->power.states[ACPI_STATE_D3_HOT].flags.valid = 1; if (acpi_bus_init_power(device)) device->flags.power_manageable = 0; @@ -1947,6 +1936,62 @@ bool acpi_dock_match(acpi_handle handle) return acpi_has_method(handle, "_DCK"); } +static acpi_status +acpi_backlight_cap_match(acpi_handle handle, u32 level, void *context, + void **return_value) +{ + long *cap = context; + + if (acpi_has_method(handle, "_BCM") && + acpi_has_method(handle, "_BCL")) { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found generic backlight " + "support\n")); + *cap |= ACPI_VIDEO_BACKLIGHT; + if (!acpi_has_method(handle, "_BQC")) + printk(KERN_WARNING FW_BUG PREFIX "No _BQC method, " + "cannot determine initial brightness\n"); + /* We have backlight support, no need to scan further */ + return AE_CTRL_TERMINATE; + } + return 0; +} + +/* Returns true if the ACPI object is a video device which can be + * handled by video.ko. + * The device will get a Linux specific CID added in scan.c to + * identify the device as an ACPI graphics device + * Be aware that the graphics device may not be physically present + * Use acpi_video_get_capabilities() to detect general ACPI video + * capabilities of present cards + */ +long acpi_is_video_device(acpi_handle handle) +{ + long video_caps = 0; + + /* Is this device able to support video switching ? */ + if (acpi_has_method(handle, "_DOD") || acpi_has_method(handle, "_DOS")) + video_caps |= ACPI_VIDEO_OUTPUT_SWITCHING; + + /* Is this device able to retrieve a video ROM ? */ + if (acpi_has_method(handle, "_ROM")) + video_caps |= ACPI_VIDEO_ROM_AVAILABLE; + + /* Is this device able to configure which video head to be POSTed ? */ + if (acpi_has_method(handle, "_VPO") && + acpi_has_method(handle, "_GPD") && + acpi_has_method(handle, "_SPD")) + video_caps |= ACPI_VIDEO_DEVICE_POSTING; + + /* Only check for backlight functionality if one of the above hit. */ + if (video_caps) + acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, + ACPI_UINT32_MAX, acpi_backlight_cap_match, NULL, + &video_caps, NULL); + + return video_caps; +} +EXPORT_SYMBOL(acpi_is_video_device); + const char *acpi_device_hid(struct acpi_device *device) { struct acpi_hardware_id *hid; @@ -2109,6 +2154,39 @@ void acpi_free_pnp_ids(struct acpi_device_pnp *pnp) kfree(pnp->unique_id); } +static void acpi_init_coherency(struct acpi_device *adev) +{ + unsigned long long cca = 0; + acpi_status status; + struct acpi_device *parent = adev->parent; + + if (parent && parent->flags.cca_seen) { + /* + * From ACPI spec, OSPM will ignore _CCA if an ancestor + * already saw one. + */ + adev->flags.cca_seen = 1; + cca = parent->flags.coherent_dma; + } else { + status = acpi_evaluate_integer(adev->handle, "_CCA", + NULL, &cca); + if (ACPI_SUCCESS(status)) + adev->flags.cca_seen = 1; + else if (!IS_ENABLED(CONFIG_ACPI_CCA_REQUIRED)) + /* + * If architecture does not specify that _CCA is + * required for DMA-able devices (e.g. x86), + * we default to _CCA=1. + */ + cca = 1; + else + acpi_handle_debug(adev->handle, + "ACPI device is missing _CCA.\n"); + } + + adev->flags.coherent_dma = cca; +} + void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, int type, unsigned long long sta) { @@ -2127,6 +2205,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, device->flags.visited = false; device_initialize(&device->dev); dev_set_uevent_suppress(&device->dev, true); + acpi_init_coherency(device); } void acpi_device_add_finalize(struct acpi_device *device) @@ -2405,7 +2484,7 @@ static void acpi_default_enumeration(struct acpi_device *device) } static const struct acpi_device_id generic_device_ids[] = { - {"PRP0001", }, + {ACPI_DT_NAMESPACE_HID, }, {"", }, }; @@ -2413,8 +2492,8 @@ static int acpi_generic_device_attach(struct acpi_device *adev, const struct acpi_device_id *not_used) { /* - * Since PRP0001 is the only ID handled here, the test below can be - * unconditional. + * Since ACPI_DT_NAMESPACE_HID is the only ID handled here, the test + * below can be unconditional. */ if (adev->data.of_compatible) acpi_default_enumeration(adev);