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More ACPI updates for 5.16-rc1 

- Add support for new ACPI device configuration object called _DSC
    to allow certain devices to be probed without changing their power
    states, document it and make two drivers use it (Sakari Ailus,
    Rajmohan Mani).
 
  - Fix device wakeup power reference counting broken recently by
    mistake (Rafael Wysocki).
 
  - Drop unused symbol and macros depending on it from acgcc.h (Rafael
    Wysocki).
 
  - Add HP ZHAN 66 Pro to the "no EC wakeup" quirk list (Binbin Zhou).
 
  - Add Xiaomi Mi Pad 2 to the backlight quirk list and drop an unused
    piece of data from all of the list entries (Hans de Goede).
 
  - Fix register read accesses handling in the Intel PMIC operation
    region driver (Hans de Goede).
 
  - Clean up static variables initialization in the EC driver
    (wangzhitong).
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Merge tag 'acpi-5.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI updates from Rafael Wysocki:
 "These add support for a new ACPI device configuration object called
  _DSC, fix some issues including one recent regression, add two new
  items to quirk lists and clean up assorted pieces of code.

  Specifics:

   - Add support for new ACPI device configuration object called _DSC
     ("Deepest State for Configuration") to allow certain devices to be
     probed without changing their power states, document it and make
     two drivers use it (Sakari Ailus, Rajmohan Mani).

   - Fix device wakeup power reference counting broken recently by
     mistake (Rafael Wysocki).

   - Drop unused symbol and macros depending on it from acgcc.h (Rafael
     Wysocki).

   - Add HP ZHAN 66 Pro to the "no EC wakeup" quirk list (Binbin Zhou).

   - Add Xiaomi Mi Pad 2 to the backlight quirk list and drop an unused
     piece of data from all of the list entries (Hans de Goede).

   - Fix register read accesses handling in the Intel PMIC operation
     region driver (Hans de Goede).

   - Clean up static variables initialization in the EC driver
     (wangzhitong)"

* tag 'acpi-5.16-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Documentation: ACPI: Fix non-D0 probe _DSC object example
  ACPI: Drop ACPI_USE_BUILTIN_STDARG ifdef from acgcc.h
  ACPI: PM: Fix device wakeup power reference counting error
  ACPI: video: use platform backlight driver on Xiaomi Mi Pad 2
  ACPI: video: Drop dmi_system_id.ident settings from video_detect_dmi_table[]
  ACPI: PMIC: Fix intel_pmic_regs_handler() read accesses
  ACPI: EC: Remove initialization of static variables to false
  ACPI: EC: Use ec_no_wakeup on HP ZHAN 66 Pro
  at24: Support probing while in non-zero ACPI D state
  media: i2c: imx319: Support device probe in non-zero ACPI D state
  ACPI: Add a convenience function to tell a device is in D0 state
  Documentation: ACPI: Document _DSC object usage for enum power state
  i2c: Allow an ACPI driver to manage the device's power state during probe
  ACPI: scan: Obtain device's desired enumeration power state
This commit is contained in:
Linus Torvalds 2021-11-10 11:52:40 -08:00
parent e68a7d35bb 314c6e2b45
commit 285fc3db0a
16 changed files with 302 additions and 130 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/firmware-guide/acpi/index.rst
View File

@ -26,5 +26,6 @@ ACPI Support
acpi-lid
lpit
video_extension
non-d0-probe
extcon-intel-int3496
intel-pmc-mux

78
Documentation/firmware-guide/acpi/non-d0-probe.rst Normal file
View File

@ -0,0 +1,78 @@
.. SPDX-License-Identifier: GPL-2.0
========================================
Probing devices in other D states than 0
========================================
Introduction
============
In some cases it may be preferred to leave certain devices powered off for the
entire system bootup if powering on these devices has adverse side effects,
beyond just powering on the said device.
How it works
============
The _DSC (Device State for Configuration) object that evaluates to an integer
may be used to tell Linux the highest allowed D state for a device during
probe. The support for _DSC requires support from the kernel bus type if the
bus driver normally sets the device in D0 state for probe.
The downside of using _DSC is that as the device is not powered on, even if
there's a problem with the device, the driver likely probes just fine but the
first user will find out the device doesn't work, instead of a failure at probe
time. This feature should thus be used sparingly.
I²C
---
If an I²C driver indicates its support for this by setting the
I2C_DRV_ACPI_WAIVE_D0_PROBE flag in struct i2c_driver.flags field and the
_DSC object evaluates to integer higher than the D state of the device,
the device will not be powered on (put in D0 state) for probe.
D states
--------
The D states and thus also the allowed values for _DSC are listed below. Refer
to [1] for more information on device power states.
.. code-block:: text
Number State Description
0 D0 Device fully powered on
1 D1
2 D2
3 D3hot
4 D3cold Off
References
==========
[1] https://uefi.org/specifications/ACPI/6.4/02_Definition_of_Terms/Definition_of_Terms.html#device-power-state-definitions
Example
=======
An ASL example describing an ACPI device using _DSC object to tell Operating
System the device should remain powered off during probe looks like this. Some
objects not relevant from the example point of view have been omitted.
.. code-block:: text
Device (CAM0)
{
Name (_HID, "SONY319A")
Name (_UID, Zero)
Name (_CRS, ResourceTemplate ()
{
I2cSerialBus(0x0020, ControllerInitiated, 0x00061A80,
AddressingMode7Bit, "\\_SB.PCI0.I2C0",
0x00, ResourceConsumer)
})
Method (_DSC, 0, NotSerialized)
{
Return (0x4)
}
}

26
drivers/acpi/device_pm.c
View File

@ -1400,4 +1400,30 @@ bool acpi_storage_d3(struct device *dev)
}
EXPORT_SYMBOL_GPL(acpi_storage_d3);
/**
* acpi_dev_state_d0 - Tell if the device is in D0 power state
* @dev: Physical device the ACPI power state of which to check
*
* On a system without ACPI, return true. On a system with ACPI, return true if
* the current ACPI power state of the device is D0, or false otherwise.
*
* Note that the power state of a device is not well-defined after it has been
* passed to acpi_device_set_power() and before that function returns, so it is
* not valid to ask for the ACPI power state of the device in that time frame.
*
* This function is intended to be used in a driver's probe or remove
* function. See Documentation/firmware-guide/acpi/low-power-probe.rst for
* more information.
*/
bool acpi_dev_state_d0(struct device *dev)
{
struct acpi_device *adev = ACPI_COMPANION(dev);
if (!adev)
return true;
return adev->power.state == ACPI_STATE_D0;
}
EXPORT_SYMBOL_GPL(acpi_dev_state_d0);
#endif /* CONFIG_PM */

11
drivers/acpi/ec.c
View File

@ -133,7 +133,7 @@ static unsigned int ec_storm_threshold __read_mostly = 8;
module_param(ec_storm_threshold, uint, 0644);
MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm");
static bool ec_freeze_events __read_mostly = false;
static bool ec_freeze_events __read_mostly;
module_param(ec_freeze_events, bool, 0644);
MODULE_PARM_DESC(ec_freeze_events, "Disabling event handling during suspend/resume");
@ -177,7 +177,7 @@ struct acpi_ec *first_ec;
EXPORT_SYMBOL(first_ec);
static struct acpi_ec *boot_ec;
static bool boot_ec_is_ecdt = false;
static bool boot_ec_is_ecdt;
static struct workqueue_struct *ec_wq;
static struct workqueue_struct *ec_query_wq;
@ -2152,6 +2152,13 @@ static const struct dmi_system_id acpi_ec_no_wakeup[] = {
DMI_MATCH(DMI_PRODUCT_FAMILY, "ThinkPad X1 Yoga 3rd"),
},
},
{
.ident = "HP ZHAN 66 Pro",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "HP"),
DMI_MATCH(DMI_PRODUCT_FAMILY, "103C_5336AN HP ZHAN 66 Pro"),
},
},
{ },
};

51
drivers/acpi/pmic/intel_pmic.c
View File

@ -211,31 +211,36 @@ static acpi_status intel_pmic_regs_handler(u32 function,
void *handler_context, void *region_context)
{
struct intel_pmic_opregion *opregion = region_context;
int result = 0;
int result = -EINVAL;
switch (address) {
case 0:
return AE_OK;
case 1:
opregion->ctx.addr |= (*value64 & 0xff) << 8;
return AE_OK;
case 2:
opregion->ctx.addr |= *value64 & 0xff;
return AE_OK;
case 3:
opregion->ctx.val = *value64 & 0xff;
return AE_OK;
case 4:
if (*value64) {
result = regmap_write(opregion->regmap, opregion->ctx.addr,
opregion->ctx.val);
} else {
result = regmap_read(opregion->regmap, opregion->ctx.addr,
&opregion->ctx.val);
if (result == 0)
*value64 = opregion->ctx.val;
if (function == ACPI_WRITE) {
switch (address) {
case 0:
return AE_OK;
case 1:
opregion->ctx.addr |= (*value64 & 0xff) << 8;
return AE_OK;
case 2:
opregion->ctx.addr |= *value64 & 0xff;
return AE_OK;
case 3:
opregion->ctx.val = *value64 & 0xff;
return AE_OK;
case 4:
if (*value64) {
result = regmap_write(opregion->regmap, opregion->ctx.addr,
opregion->ctx.val);
} else {
result = regmap_read(opregion->regmap, opregion->ctx.addr,
&opregion->ctx.val);
}
opregion->ctx.addr = 0;
}
memset(&opregion->ctx, 0x00, sizeof(opregion->ctx));
}
if (function == ACPI_READ && address == 3) {
*value64 = opregion->ctx.val;
return AE_OK;
}
if (result < 0) {

10
drivers/acpi/power.c
View File

@ -757,13 +757,11 @@ int acpi_disable_wakeup_device_power(struct acpi_device *dev)
mutex_lock(&acpi_device_lock);
if (dev->wakeup.prepare_count > 1) {
dev->wakeup.prepare_count--;
goto out;
}
/* Do nothing if wakeup power has not been enabled for this device. */
if (!dev->wakeup.prepare_count)
if (dev->wakeup.prepare_count <= 0)
goto out;
if (--dev->wakeup.prepare_count > 0)
goto out;
err = acpi_device_sleep_wake(dev, 0, 0, 0);

4
drivers/acpi/scan.c
View File

@ -1017,6 +1017,7 @@ static void acpi_bus_init_power_state(struct acpi_device *device, int state)
static void acpi_bus_get_power_flags(struct acpi_device *device)
{
unsigned long long dsc = ACPI_STATE_D0;
u32 i;
/* Presence of _PS0|_PR0 indicates 'power manageable' */
@ -1038,6 +1039,9 @@ static void acpi_bus_get_power_flags(struct acpi_device *device)
if (acpi_has_method(device->handle, "_DSW"))
device->power.flags.dsw_present = 1;
acpi_evaluate_integer(device->handle, "_DSC", NULL, &dsc);
device->power.state_for_enumeration = dsc;
/*
* Enumerate supported power management states
*/

78
drivers/acpi/video_detect.c
View File

@ -115,7 +115,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
*/
{
.callback = video_detect_force_vendor,
.ident = "X360",
/* X360 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "X360"),
@ -124,7 +124,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_vendor,
.ident = "Asus UL30VT",
/* Asus UL30VT */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "UL30VT"),
@ -132,7 +132,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_vendor,
.ident = "Asus UL30A",
/* Asus UL30A */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK Computer Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"),
@ -140,7 +140,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_vendor,
.ident = "GIGABYTE GB-BXBT-2807",
/* GIGABYTE GB-BXBT-2807 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"),
DMI_MATCH(DMI_PRODUCT_NAME, "GB-BXBT-2807"),
@ -148,12 +148,20 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_vendor,
.ident = "Sony VPCEH3U1E",
/* Sony VPCEH3U1E */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Sony Corporation"),
DMI_MATCH(DMI_PRODUCT_NAME, "VPCEH3U1E"),
},
},
{
.callback = video_detect_force_vendor,
/* Xiaomi Mi Pad 2 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Xiaomi Inc"),
DMI_MATCH(DMI_PRODUCT_NAME, "Mipad2"),
},
},
/*
* These models have a working acpi_video backlight control, and using
@ -164,7 +172,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
*/
{
.callback = video_detect_force_video,
.ident = "ThinkPad T420",
/* ThinkPad T420 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T420"),
@ -172,7 +180,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_video,
.ident = "ThinkPad T520",
/* ThinkPad T520 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad T520"),
@ -180,7 +188,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_video,
.ident = "ThinkPad X201s",
/* ThinkPad X201s */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"),
@ -188,7 +196,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_video,
.ident = "ThinkPad X201T",
/* ThinkPad X201T */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"),
@ -199,7 +207,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugs.freedesktop.org/show_bug.cgi?id=81515 */
.callback = video_detect_force_video,
.ident = "HP ENVY 15 Notebook",
/* HP ENVY 15 Notebook */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP ENVY 15 Notebook PC"),
@ -207,7 +215,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_video,
.ident = "SAMSUNG 870Z5E/880Z5E/680Z5E",
/* SAMSUNG 870Z5E/880Z5E/680Z5E */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "870Z5E/880Z5E/680Z5E"),
@ -215,7 +223,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_video,
.ident = "SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V",
/* SAMSUNG 370R4E/370R4V/370R5E/3570RE/370R5V */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME,
@ -225,7 +233,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1186097 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 3570R/370R/470R/450R/510R/4450RV",
/* SAMSUNG 3570R/370R/470R/450R/510R/4450RV */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME,
@ -235,7 +243,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1557060 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 670Z5E",
/* SAMSUNG 670Z5E */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "670Z5E"),
@ -244,7 +252,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1094948 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 730U3E/740U3E",
/* SAMSUNG 730U3E/740U3E */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "730U3E/740U3E"),
@ -253,7 +261,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugs.freedesktop.org/show_bug.cgi?id=87286 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D",
/* SAMSUNG 900X3C/900X3D/900X3E/900X4C/900X4D */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME,
@ -263,7 +271,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1272633 */
.callback = video_detect_force_video,
.ident = "Dell XPS14 L421X",
/* Dell XPS14 L421X */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "XPS L421X"),
@ -272,7 +280,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1163574 */
.callback = video_detect_force_video,
.ident = "Dell XPS15 L521X",
/* Dell XPS15 L521X */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"),
@ -281,7 +289,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.kernel.org/show_bug.cgi?id=108971 */
.callback = video_detect_force_video,
.ident = "SAMSUNG 530U4E/540U4E",
/* SAMSUNG 530U4E/540U4E */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"),
@ -290,7 +298,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
/* https://bugs.launchpad.net/bugs/1894667 */
{
.callback = video_detect_force_video,
.ident = "HP 635 Notebook",
/* HP 635 Notebook */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"),
@ -301,7 +309,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1201530 */
.callback = video_detect_force_native,
.ident = "Lenovo Ideapad S405",
/* Lenovo Ideapad S405 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_BOARD_NAME, "Lenovo IdeaPad S405"),
@ -310,7 +318,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1187004 */
.callback = video_detect_force_native,
.ident = "Lenovo Ideapad Z570",
/* Lenovo Ideapad Z570 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
@ -318,7 +326,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "Lenovo E41-25",
/* Lenovo E41-25 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "81FS"),
@ -326,7 +334,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "Lenovo E41-45",
/* Lenovo E41-45 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "82BK"),
@ -335,7 +343,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1217249 */
.callback = video_detect_force_native,
.ident = "Apple MacBook Pro 12,1",
/* Apple MacBook Pro 12,1 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro12,1"),
@ -343,7 +351,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "Dell Vostro V131",
/* Dell Vostro V131 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
@ -352,7 +360,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.redhat.com/show_bug.cgi?id=1123661 */
.callback = video_detect_force_native,
.ident = "Dell XPS 17 L702X",
/* Dell XPS 17 L702X */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Dell System XPS L702X"),
@ -360,7 +368,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "Dell Precision 7510",
/* Dell Precision 7510 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Precision 7510"),
@ -368,7 +376,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "Acer Aspire 5738z",
/* Acer Aspire 5738z */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
@ -378,7 +386,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
{
/* https://bugzilla.kernel.org/show_bug.cgi?id=207835 */
.callback = video_detect_force_native,
.ident = "Acer TravelMate 5735Z",
/* Acer TravelMate 5735Z */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5735Z"),
@ -387,7 +395,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "ASUSTeK COMPUTER INC. GA401",
/* ASUSTeK COMPUTER INC. GA401 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "GA401"),
@ -395,7 +403,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "ASUSTeK COMPUTER INC. GA502",
/* ASUSTeK COMPUTER INC. GA502 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "GA502"),
@ -403,7 +411,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_native,
.ident = "ASUSTeK COMPUTER INC. GA503",
/* ASUSTeK COMPUTER INC. GA503 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
DMI_MATCH(DMI_PRODUCT_NAME, "GA503"),
@ -416,7 +424,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
*/
{
.callback = video_detect_force_none,
.ident = "Dell OptiPlex 9020M",
/* Dell OptiPlex 9020M */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 9020M"),
@ -424,7 +432,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
},
{
.callback = video_detect_force_none,
.ident = "MSI MS-7721",
/* MSI MS-7721 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "MSI"),
DMI_MATCH(DMI_PRODUCT_NAME, "MS-7721"),

10
drivers/i2c/i2c-core-acpi.c
View File

@ -522,6 +522,16 @@ struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
}
EXPORT_SYMBOL_GPL(i2c_acpi_new_device);
bool i2c_acpi_waive_d0_probe(struct device *dev)
{
struct i2c_driver *driver = to_i2c_driver(dev->driver);
struct acpi_device *adev = ACPI_COMPANION(dev);
return driver->flags & I2C_DRV_ACPI_WAIVE_D0_PROBE &&
adev && adev->power.state_for_enumeration >= adev->power.state;
}
EXPORT_SYMBOL_GPL(i2c_acpi_waive_d0_probe);
#ifdef CONFIG_ACPI_I2C_OPREGION
static int acpi_gsb_i2c_read_bytes(struct i2c_client *client,
u8 cmd, u8 *data, u8 data_len)

7
drivers/i2c/i2c-core-base.c
View File

@ -551,7 +551,8 @@ static int i2c_device_probe(struct device *dev)
if (status < 0)
goto err_clear_wakeup_irq;
status = dev_pm_domain_attach(&client->dev, true);
status = dev_pm_domain_attach(&client->dev,
!i2c_acpi_waive_d0_probe(dev));
if (status)
goto err_clear_wakeup_irq;
@ -590,7 +591,7 @@ static int i2c_device_probe(struct device *dev)
err_release_driver_resources:
devres_release_group(&client->dev, client->devres_group_id);
err_detach_pm_domain:
dev_pm_domain_detach(&client->dev, true);
dev_pm_domain_detach(&client->dev, !i2c_acpi_waive_d0_probe(dev));
err_clear_wakeup_irq:
dev_pm_clear_wake_irq(&client->dev);
device_init_wakeup(&client->dev, false);
@ -621,7 +622,7 @@ static void i2c_device_remove(struct device *dev)
devres_release_group(&client->dev, client->devres_group_id);
dev_pm_domain_detach(&client->dev, true);
dev_pm_domain_detach(&client->dev, !i2c_acpi_waive_d0_probe(dev));
if (!pm_runtime_status_suspended(&client->dev) && adap->bus_regulator)
regulator_disable(adap->bus_regulator);

74
drivers/media/i2c/imx319.c
View File

@ -140,6 +140,8 @@ struct imx319 {
/* Streaming on/off */
bool streaming;
/* True if the device has been identified */
bool identified;
};
static const struct imx319_reg imx319_global_regs[] = {
@ -2084,6 +2086,31 @@ imx319_set_pad_format(struct v4l2_subdev *sd,
return 0;
}
/* Verify chip ID */
static int imx319_identify_module(struct imx319 *imx319)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx319->sd);
int ret;
u32 val;
if (imx319->identified)
return 0;
ret = imx319_read_reg(imx319, IMX319_REG_CHIP_ID, 2, &val);
if (ret)
return ret;
if (val != IMX319_CHIP_ID) {
dev_err(&client->dev, "chip id mismatch: %x!=%x",
IMX319_CHIP_ID, val);
return -EIO;
}
imx319->identified = true;
return 0;
}
/* Start streaming */
static int imx319_start_streaming(struct imx319 *imx319)
{
@ -2091,6 +2118,10 @@ static int imx319_start_streaming(struct imx319 *imx319)
const struct imx319_reg_list *reg_list;
int ret;
ret = imx319_identify_module(imx319);
if (ret)
return ret;
/* Global Setting */
reg_list = &imx319_global_setting;
ret = imx319_write_regs(imx319, reg_list->regs, reg_list->num_of_regs);
@ -2206,26 +2237,6 @@ error:
return ret;
}
/* Verify chip ID */
static int imx319_identify_module(struct imx319 *imx319)
{
struct i2c_client *client = v4l2_get_subdevdata(&imx319->sd);
int ret;
u32 val;
ret = imx319_read_reg(imx319, IMX319_REG_CHIP_ID, 2, &val);
if (ret)
return ret;
if (val != IMX319_CHIP_ID) {
dev_err(&client->dev, "chip id mismatch: %x!=%x",
IMX319_CHIP_ID, val);
return -EIO;
}
return 0;
}
static const struct v4l2_subdev_core_ops imx319_subdev_core_ops = {
.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
.unsubscribe_event = v4l2_event_subdev_unsubscribe,
@ -2420,6 +2431,7 @@ out_err:
static int imx319_probe(struct i2c_client *client)
{
struct imx319 *imx319;
bool full_power;
int ret;
u32 i;
@ -2432,11 +2444,14 @@ static int imx319_probe(struct i2c_client *client)
/* Initialize subdev */
v4l2_i2c_subdev_init(&imx319->sd, client, &imx319_subdev_ops);
/* Check module identity */
ret = imx319_identify_module(imx319);
if (ret) {
dev_err(&client->dev, "failed to find sensor: %d", ret);
goto error_probe;
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
/* Check module identity */
ret = imx319_identify_module(imx319);
if (ret) {
dev_err(&client->dev, "failed to find sensor: %d", ret);
goto error_probe;
}
}
imx319->hwcfg = imx319_get_hwcfg(&client->dev);
@ -2488,11 +2503,9 @@ static int imx319_probe(struct i2c_client *client)
if (ret < 0)
goto error_media_entity;
/*
* Device is already turned on by i2c-core with ACPI domain PM.
* Enable runtime PM and turn off the device.
*/
pm_runtime_set_active(&client->dev);
/* Set the device's state to active if it's in D0 state. */
if (full_power)
pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@ -2545,6 +2558,7 @@ static struct i2c_driver imx319_i2c_driver = {
},
.probe_new = imx319_probe,
.remove = imx319_remove,
.flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
module_i2c_driver(imx319_i2c_driver);

45
drivers/misc/eeprom/at24.c
View File

@ -595,6 +595,7 @@ static int at24_probe(struct i2c_client *client)
bool i2c_fn_i2c, i2c_fn_block;
unsigned int i, num_addresses;
struct at24_data *at24;
bool full_power;
struct regmap *regmap;
bool writable;
u8 test_byte;
@ -747,14 +748,16 @@ static int at24_probe(struct i2c_client *client)
i2c_set_clientdata(client, at24);
err = regulator_enable(at24->vcc_reg);
if (err) {
dev_err(dev, "Failed to enable vcc regulator\n");
return err;
}
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
err = regulator_enable(at24->vcc_reg);
if (err) {
dev_err(dev, "Failed to enable vcc regulator\n");
return err;
}
/* enable runtime pm */
pm_runtime_set_active(dev);
pm_runtime_set_active(dev);
}
pm_runtime_enable(dev);
at24->nvmem = devm_nvmem_register(dev, &nvmem_config);
@ -766,15 +769,18 @@ static int at24_probe(struct i2c_client *client)
}
/*
* Perform a one-byte test read to verify that the
* chip is functional.
* Perform a one-byte test read to verify that the chip is functional,
* unless powering on the device is to be avoided during probe (i.e.
* it's powered off right now).
*/
err = at24_read(at24, 0, &test_byte, 1);
if (err) {
pm_runtime_disable(dev);
if (!pm_runtime_status_suspended(dev))
regulator_disable(at24->vcc_reg);
return -ENODEV;
if (full_power) {
err = at24_read(at24, 0, &test_byte, 1);
if (err) {
pm_runtime_disable(dev);
if (!pm_runtime_status_suspended(dev))
regulator_disable(at24->vcc_reg);
return -ENODEV;
}
}
pm_runtime_idle(dev);
@ -794,9 +800,11 @@ static int at24_remove(struct i2c_client *client)
struct at24_data *at24 = i2c_get_clientdata(client);
pm_runtime_disable(&client->dev);
if (!pm_runtime_status_suspended(&client->dev))
regulator_disable(at24->vcc_reg);
pm_runtime_set_suspended(&client->dev);
if (acpi_dev_state_d0(&client->dev)) {
if (!pm_runtime_status_suspended(&client->dev))
regulator_disable(at24->vcc_reg);
pm_runtime_set_suspended(&client->dev);
}
return 0;
}
@ -833,6 +841,7 @@ static struct i2c_driver at24_driver = {
.probe_new = at24_probe,
.remove = at24_remove,
.id_table = at24_ids,
.flags = I2C_DRV_ACPI_WAIVE_D0_PROBE,
};
static int __init at24_init(void)

1
include/acpi/acpi_bus.h
View File

@ -278,6 +278,7 @@ struct acpi_device_power {
int state; /* Current state */
struct acpi_device_power_flags flags;
struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */
u8 state_for_enumeration; /* Deepest power state for enumeration */
};
struct acpi_dep_data {

13
include/acpi/platform/acgcc.h
View File

@ -10,25 +10,12 @@
#ifndef __ACGCC_H__
#define __ACGCC_H__
/*
* Use compiler specific <stdarg.h> is a good practice for even when
* -nostdinc is specified (i.e., ACPI_USE_STANDARD_HEADERS undefined.
*/
#ifndef va_arg
#ifdef ACPI_USE_BUILTIN_STDARG
typedef __builtin_va_list va_list;
#define va_start(v, l) __builtin_va_start(v, l)
#define va_end(v) __builtin_va_end(v)
#define va_arg(v, l) __builtin_va_arg(v, l)
#define va_copy(d, s) __builtin_va_copy(d, s)
#else
#ifdef __KERNEL__
#include <linux/stdarg.h>
#else
/* Used to build acpi tools */
#include <stdarg.h>
#endif /* __KERNEL__ */
#endif /* ACPI_USE_BUILTIN_STDARG */
#endif /* ! va_arg */
#define ACPI_INLINE __inline__

5
include/linux/acpi.h
View File

@ -1014,6 +1014,7 @@ int acpi_subsys_runtime_suspend(struct device *dev);
int acpi_subsys_runtime_resume(struct device *dev);
int acpi_dev_pm_attach(struct device *dev, bool power_on);
bool acpi_storage_d3(struct device *dev);
bool acpi_dev_state_d0(struct device *dev);
#else
static inline int acpi_subsys_runtime_suspend(struct device *dev) { return 0; }
static inline int acpi_subsys_runtime_resume(struct device *dev) { return 0; }
@ -1025,6 +1026,10 @@ static inline bool acpi_storage_d3(struct device *dev)
{
return false;
}
static inline bool acpi_dev_state_d0(struct device *dev)
{
return true;
}
#endif
#if defined(CONFIG_ACPI) && defined(CONFIG_PM_SLEEP)

18
include/linux/i2c.h
View File

@ -11,6 +11,7 @@
#define _LINUX_I2C_H
#include <linux/acpi.h> /* for acpi_handle */
#include <linux/bits.h>
#include <linux/mod_devicetable.h>
#include <linux/device.h> /* for struct device */
#include <linux/sched.h> /* for completion */
@ -222,6 +223,15 @@ enum i2c_alert_protocol {
I2C_PROTOCOL_SMBUS_HOST_NOTIFY,
};
/**
* enum i2c_driver_flags - Flags for an I2C device driver
*
* @I2C_DRV_ACPI_WAIVE_D0_PROBE: Don't put the device in D0 state for probe
*/
enum i2c_driver_flags {
I2C_DRV_ACPI_WAIVE_D0_PROBE = BIT(0),
};
/**
* struct i2c_driver - represent an I2C device driver
* @class: What kind of i2c device we instantiate (for detect)
@ -236,6 +246,7 @@ enum i2c_alert_protocol {
* @detect: Callback for device detection
* @address_list: The I2C addresses to probe (for detect)
* @clients: List of detected clients we created (for i2c-core use only)
* @flags: A bitmask of flags defined in &enum i2c_driver_flags
*
* The driver.owner field should be set to the module owner of this driver.
* The driver.name field should be set to the name of this driver.
@ -294,6 +305,8 @@ struct i2c_driver {
int (*detect)(struct i2c_client *client, struct i2c_board_info *info);
const unsigned short *address_list;
struct list_head clients;
u32 flags;
};
#define to_i2c_driver(d) container_of(d, struct i2c_driver, driver)
@ -1015,6 +1028,7 @@ u32 i2c_acpi_find_bus_speed(struct device *dev);
struct i2c_client *i2c_acpi_new_device(struct device *dev, int index,
struct i2c_board_info *info);
struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle);
bool i2c_acpi_waive_d0_probe(struct device *dev);
#else
static inline bool i2c_acpi_get_i2c_resource(struct acpi_resource *ares,
struct acpi_resource_i2c_serialbus **i2c)
@ -1038,6 +1052,10 @@ static inline struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle ha
{
return NULL;
}
static inline bool i2c_acpi_waive_d0_probe(struct device *dev)
{
return false;
}
#endif /* CONFIG_ACPI */
#endif /* _LINUX_I2C_H */