* Re: [PATCH] Revert "i2c: core: support bus regulator controlling in adapter"
[not found] ` <5849ab287df1b06e141d87bbffdbcd627e999578.camel@yandex.ru>
@ 2022-01-07 18:35 ` Konstantin Kharlamov
0 siblings, 0 replies; 11+ messages in thread
From: Konstantin Kharlamov @ 2022-01-07 18:35 UTC (permalink / raw)
To: Tareque Md.Hanif, Konstantin Kharlamov, linux-kernel, amd-gfx,
Bibby Hsieh, Marek Szyprowski, Hsin-Yi Wang, Matthias Brugger,
Wolfram Sang
On Fri, 2022-01-07 at 21:20 +0300, Konstantin Kharlamov wrote:
> Thank you! I tested it (had to resolve a small conflict), works for me. So, in
> case you need it, the patch is
>
> Tested-by: Konstantin Kharlamov <hi-angel@yandex.ru>
>
> By the way, shouldn't the patch include a field
>
> Cc: <stable@vger.kernel.org> # 5.14+
>
> ?
>
> P.S.: sorry, for all mangled up CC fields. For some reason I didn't get your
> email, I found this patch in the archive. And the mbox that archive provides
> breaks all TO and CC fields, so I manually restored addresses that I have.
Restored the fields now, sorry, I found the mail, it was moved to another folder by a filter
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH] Revert "i2c: core: support bus regulator controlling in adapter"
@ 2022-01-06 12:24 Wolfram Sang
2022-01-07 20:28 ` Wolfram Sang
2022-01-12 9:32 ` Wolfram Sang
0 siblings, 2 replies; 11+ messages in thread
From: Wolfram Sang @ 2022-01-06 12:24 UTC (permalink / raw)
To: linux-i2c
Cc: Tareque Md.Hanif, Konstantin Kharlamov, linux-kernel, amd-gfx,
Bibby Hsieh, Marek Szyprowski, Hsin-Yi Wang, Matthias Brugger,
Wolfram Sang
This largely reverts commit 5a7b95fb993ec399c8a685552aa6a8fc995c40bd. It
breaks suspend with AMD GPUs, and we couldn't incrementally fix it. So,
let's remove the code and go back to the drawing board. We keep the
header extension to not break drivers already populating the regulator.
We expect to re-add the code handling it soon.
Reported-by: "Tareque Md.Hanif" <tarequemd.hanif@yahoo.com>
Link: https://lore.kernel.org/r/1295184560.182511.1639075777725@mail.yahoo.com
Reported-by: Konstantin Kharlamov <hi-angel@yandex.ru>
Link: https://lore.kernel.org/r/7143a7147978f4104171072d9f5225d2ce355ec1.camel@yandex.ru
BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1850
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
So far, I tested it on a Renesas R-Car M3-N board verifying that I2C
still works. I'll apply it to my for-next branch right away to get the
buildbots involved as well. But I am still open for comments until I
apply it to my for-current branch, probably tomorrow.
drivers/i2c/i2c-core-base.c | 95 -------------------------------------
1 file changed, 95 deletions(-)
diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index f193f9058584..73253e667de1 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -466,14 +466,12 @@ static int i2c_smbus_host_notify_to_irq(const struct i2c_client *client)
static int i2c_device_probe(struct device *dev)
{
struct i2c_client *client = i2c_verify_client(dev);
- struct i2c_adapter *adap;
struct i2c_driver *driver;
int status;
if (!client)
return 0;
- adap = client->adapter;
client->irq = client->init_irq;
if (!client->irq) {
@@ -539,14 +537,6 @@ static int i2c_device_probe(struct device *dev)
dev_dbg(dev, "probe\n");
- if (adap->bus_regulator) {
- status = regulator_enable(adap->bus_regulator);
- if (status < 0) {
- dev_err(&adap->dev, "Failed to enable bus regulator\n");
- goto err_clear_wakeup_irq;
- }
- }
-
status = of_clk_set_defaults(dev->of_node, false);
if (status < 0)
goto err_clear_wakeup_irq;
@@ -605,10 +595,8 @@ static int i2c_device_probe(struct device *dev)
static void i2c_device_remove(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
- struct i2c_adapter *adap;
struct i2c_driver *driver;
- adap = client->adapter;
driver = to_i2c_driver(dev->driver);
if (driver->remove) {
int status;
@@ -623,8 +611,6 @@ static void i2c_device_remove(struct device *dev)
devres_release_group(&client->dev, client->devres_group_id);
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);
dev_pm_clear_wake_irq(&client->dev);
device_init_wakeup(&client->dev, false);
@@ -634,86 +620,6 @@ static void i2c_device_remove(struct device *dev)
pm_runtime_put(&client->adapter->dev);
}
-#ifdef CONFIG_PM_SLEEP
-static int i2c_resume_early(struct device *dev)
-{
- struct i2c_client *client = i2c_verify_client(dev);
- int err;
-
- if (!client)
- return 0;
-
- if (pm_runtime_status_suspended(&client->dev) &&
- client->adapter->bus_regulator) {
- err = regulator_enable(client->adapter->bus_regulator);
- if (err)
- return err;
- }
-
- return pm_generic_resume_early(&client->dev);
-}
-
-static int i2c_suspend_late(struct device *dev)
-{
- struct i2c_client *client = i2c_verify_client(dev);
- int err;
-
- if (!client)
- return 0;
-
- err = pm_generic_suspend_late(&client->dev);
- if (err)
- return err;
-
- if (!pm_runtime_status_suspended(&client->dev) &&
- client->adapter->bus_regulator)
- return regulator_disable(client->adapter->bus_regulator);
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_PM
-static int i2c_runtime_resume(struct device *dev)
-{
- struct i2c_client *client = i2c_verify_client(dev);
- int err;
-
- if (!client)
- return 0;
-
- if (client->adapter->bus_regulator) {
- err = regulator_enable(client->adapter->bus_regulator);
- if (err)
- return err;
- }
-
- return pm_generic_runtime_resume(&client->dev);
-}
-
-static int i2c_runtime_suspend(struct device *dev)
-{
- struct i2c_client *client = i2c_verify_client(dev);
- int err;
-
- if (!client)
- return 0;
-
- err = pm_generic_runtime_suspend(&client->dev);
- if (err)
- return err;
-
- if (client->adapter->bus_regulator)
- return regulator_disable(client->adapter->bus_regulator);
- return 0;
-}
-#endif
-
-static const struct dev_pm_ops i2c_device_pm = {
- SET_LATE_SYSTEM_SLEEP_PM_OPS(i2c_suspend_late, i2c_resume_early)
- SET_RUNTIME_PM_OPS(i2c_runtime_suspend, i2c_runtime_resume, NULL)
-};
-
static void i2c_device_shutdown(struct device *dev)
{
struct i2c_client *client = i2c_verify_client(dev);
@@ -773,7 +679,6 @@ struct bus_type i2c_bus_type = {
.probe = i2c_device_probe,
.remove = i2c_device_remove,
.shutdown = i2c_device_shutdown,
- .pm = &i2c_device_pm,
};
EXPORT_SYMBOL_GPL(i2c_bus_type);
--
2.30.2
^ permalink raw reply related [flat|nested] 11+ messages in thread
* Re: [PATCH] Revert "i2c: core: support bus regulator controlling in adapter"
2022-01-06 12:24 Wolfram Sang
@ 2022-01-07 20:28 ` Wolfram Sang
2022-01-12 9:32 ` Wolfram Sang
1 sibling, 0 replies; 11+ messages in thread
From: Wolfram Sang @ 2022-01-07 20:28 UTC (permalink / raw)
To: linux-i2c
Cc: Tareque Md.Hanif, Konstantin Kharlamov, linux-kernel, amd-gfx,
Bibby Hsieh, Marek Szyprowski, Hsin-Yi Wang, Matthias Brugger
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On Thu, Jan 06, 2022 at 01:24:52PM +0100, Wolfram Sang wrote:
> This largely reverts commit 5a7b95fb993ec399c8a685552aa6a8fc995c40bd. It
> breaks suspend with AMD GPUs, and we couldn't incrementally fix it. So,
> let's remove the code and go back to the drawing board. We keep the
> header extension to not break drivers already populating the regulator.
> We expect to re-add the code handling it soon.
>
> Reported-by: "Tareque Md.Hanif" <tarequemd.hanif@yahoo.com>
> Link: https://lore.kernel.org/r/1295184560.182511.1639075777725@mail.yahoo.com
> Reported-by: Konstantin Kharlamov <hi-angel@yandex.ru>
> Link: https://lore.kernel.org/r/7143a7147978f4104171072d9f5225d2ce355ec1.camel@yandex.ru
> BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1850
> Signed-off-by: Wolfram Sang <wsa@kernel.org>
Applied to for-current, thanks!
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^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] Revert "i2c: core: support bus regulator controlling in adapter"
2022-01-06 12:24 Wolfram Sang
2022-01-07 20:28 ` Wolfram Sang
@ 2022-01-12 9:32 ` Wolfram Sang
2022-01-12 9:51 ` Konstantin Kharlamov
1 sibling, 1 reply; 11+ messages in thread
From: Wolfram Sang @ 2022-01-12 9:32 UTC (permalink / raw)
To: linux-i2c
Cc: Tareque Md.Hanif, Konstantin Kharlamov, linux-kernel, amd-gfx,
Bibby Hsieh, Marek Szyprowski, Hsin-Yi Wang, Matthias Brugger
[-- Attachment #1: Type: text/plain, Size: 1066 bytes --]
Hi everyone,
On Thu, Jan 06, 2022 at 01:24:52PM +0100, Wolfram Sang wrote:
> This largely reverts commit 5a7b95fb993ec399c8a685552aa6a8fc995c40bd. It
> breaks suspend with AMD GPUs, and we couldn't incrementally fix it. So,
> let's remove the code and go back to the drawing board. We keep the
> header extension to not break drivers already populating the regulator.
> We expect to re-add the code handling it soon.
>
> Reported-by: "Tareque Md.Hanif" <tarequemd.hanif@yahoo.com>
> Link: https://lore.kernel.org/r/1295184560.182511.1639075777725@mail.yahoo.com
> Reported-by: Konstantin Kharlamov <hi-angel@yandex.ru>
> Link: https://lore.kernel.org/r/7143a7147978f4104171072d9f5225d2ce355ec1.camel@yandex.ru
> BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1850
> Signed-off-by: Wolfram Sang <wsa@kernel.org>
So, it has been reverted now. Is someone of the original patch
submitters interested in re-adding it? And would the reporters of the
regression be available for further testing?
Thanks and happy hacking,
Wolfram
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^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH] Revert "i2c: core: support bus regulator controlling in adapter"
2022-01-12 9:32 ` Wolfram Sang
@ 2022-01-12 9:51 ` Konstantin Kharlamov
[not found] ` <4dfbee97-14c2-718b-9cbd-fdeeace96f59@yahoo.com>
0 siblings, 1 reply; 11+ messages in thread
From: Konstantin Kharlamov @ 2022-01-12 9:51 UTC (permalink / raw)
To: Wolfram Sang, linux-i2c
Cc: Tareque Md.Hanif, linux-kernel, amd-gfx, Bibby Hsieh,
Marek Szyprowski, Hsin-Yi Wang, Matthias Brugger
On Wed, 2022-01-12 at 10:32 +0100, Wolfram Sang wrote:
> Hi everyone,
>
> On Thu, Jan 06, 2022 at 01:24:52PM +0100, Wolfram Sang wrote:
> > This largely reverts commit 5a7b95fb993ec399c8a685552aa6a8fc995c40bd. It
> > breaks suspend with AMD GPUs, and we couldn't incrementally fix it. So,
> > let's remove the code and go back to the drawing board. We keep the
> > header extension to not break drivers already populating the regulator.
> > We expect to re-add the code handling it soon.
> >
> > Reported-by: "Tareque Md.Hanif" <tarequemd.hanif@yahoo.com>
> > Link:
> > https://lore.kernel.org/r/1295184560.182511.1639075777725@mail.yahoo.com
> > Reported-by: Konstantin Kharlamov <hi-angel@yandex.ru>
> > Link:
> > https://lore.kernel.org/r/7143a7147978f4104171072d9f5225d2ce355ec1.camel@yandex.ru
> > BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1850
> > Signed-off-by: Wolfram Sang <wsa@kernel.org>
>
> So, it has been reverted now. Is someone of the original patch
> submitters interested in re-adding it? And would the reporters of the
> regression be available for further testing?
I am available for further testing.
> Thanks and happy hacking,
>
> Wolfram
>
^ permalink raw reply [flat|nested] 11+ messages in thread
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2022-01-07 18:35 ` [PATCH] Revert "i2c: core: support bus regulator controlling in adapter" Konstantin Kharlamov
2022-01-06 12:24 Wolfram Sang
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