From: Sudeep Holla <sudeep.holla@arm.com>
To: Saravana Kannan <saravanak@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sudeep Holla <sudeep.holla@arm.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <brgl@bgdev.pl>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Daniel Scally <djrscally@gmail.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Len Brown <lenb@kernel.org>, Abel Vesa <abel.vesa@linaro.org>,
Alexander Stein <alexander.stein@ew.tq-group.com>,
Tony Lindgren <tony@atomide.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
John Stultz <jstultz@google.com>,
Doug Anderson <dianders@chromium.org>,
Guenter Roeck <linux@roeck-us.net>,
kernel-team@android.com, linux-kernel@vger.kernel.org,
linux-gpio@vger.kernel.org, devicetree@vger.kernel.org,
linux-renesas-soc@vger.kernel.org, linux-acpi@vger.kernel.org
Subject: Re: [PATCH v1 0/9] fw_devlink improvements
Date: Mon, 15 Aug 2022 14:52:51 +0100 [thread overview]
Message-ID: <20220815135251.i3pejjtnd3nqeolo@bogus> (raw)
In-Reply-To: <20220810060040.321697-1-saravanak@google.com>
On Tue, Aug 09, 2022 at 11:00:29PM -0700, Saravana Kannan wrote:
> This patch series improves fw_devlink in the following ways:
>
> 1. It no longer cares about a fwnode having a "compatible" property. It
> figures this our more dynamically. The only expectation is that
> fwnode that are converted to devices actually get probed by a driver
> for the dependencies to be enforced correctly.
>
> 2. Finer grained dependency tracking. fw_devlink will now create device
> links from the consumer to the actual resource's device (if it has one,
> Eg: gpio_device) instead of the parent supplier device. This improves
> things like async suspend/resume ordering, potentially remove the need
> for frameworks to create device links, more parallelized async probing,
> and better sync_state() tracking.
>
> 3. Handle hardware/software quirks where a child firmware node gets
> populated as a device before its parent firmware node AND actually
> supplies a non-optional resource to the parent firmware node's
> device.
>
> 4. Way more robust at cycle handling (see patch for the insane cases).
>
> 5. Stops depending on OF_POPULATED to figure out some corner cases.
>
> 6. Simplifies the work that needs to be done by the firmware specific
> code.
>
> This took way too long to get done due to typo bugs I had in my rewrite or
> corner cases I had to find and handle. But it's fairly well tested at this
> point and I expect this to work properly.
>
> Abel & Doug,
>
> This should fix your cyclic dependency issues with your display. Can you
> give it a shot please?
>
> Alexander,
>
> This should fix your issue where the power domain device not having a
> compatible property. Can you give it a shot please?
>
> Tony,
>
> This should handle the odd case of the child being the supplier of the
> parent. Can you please give this a shot? I want to make sure the cycle
> detection code handles this properly and treats it like it's NOT a cycle.
>
> Geert,
>
> Can you test the renesas stuff I changed please? They should continue
> working like before. Any other sanity test on other hardware would be
> great too.
>
> Sudeep,
>
> I don't think there are any unfixed issues you had reported in my other
> patches that this series might fix, but it'll be nice if you could give
> this a sanity test.
>
Sure tested this on Juno on top of v6.0-rc1 and found no regressions.
So,
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Just wanted to check if the logs are intentional or do you plan to make
them debug. On Juno with hardly few such dependencies I get below extra
logs during boot, it may add loads on other platforms. I am fine either
way, just thought of checking.
| amba 20040000.funnel: Fixed dependency cycle(s) with /etf@20010000/in-ports/port/endpoint
| amba 20120000.replicator: Fixed dependency cycle(s) with /etr@20070000/in-ports/port/endpoint
| amba 20120000.replicator: Fixed dependency cycle(s) with /tpiu@20030000/in-ports/port/endpoint
| amba 220c0000.funnel: Fixed dependency cycle(s) with /etm@22040000/out-ports/port/endpoint
| amba 220c0000.funnel: Fixed dependency cycle(s) with /funnel@20040000/in-ports/port@0/endpoint
| amba 22140000.etm: Fixed dependency cycle(s) with /funnel@220c0000/in-ports/port@1/endpoint
| amba 230c0000.funnel: Fixed dependency cycle(s) with /etm@23040000/out-ports/port/endpoint
| amba 230c0000.funnel: Fixed dependency cycle(s) with /funnel@20040000/in-ports/port@1/endpoint
| amba 23140000.etm: Fixed dependency cycle(s) with /funnel@230c0000/in-ports/port@1/endpoint
| amba 23240000.etm: Fixed dependency cycle(s) with /funnel@230c0000/in-ports/port@2/endpoint
| amba 23340000.etm: Fixed dependency cycle(s) with /funnel@230c0000/in-ports/port@3/endpoint
| amba 20130000.funnel: Fixed dependency cycle(s) with /stm@20100000/out-ports/port/endpoint
| amba 20140000.etf: Fixed dependency cycle(s) with /funnel@20130000/out-ports/port/endpoint
| amba 20150000.funnel: Fixed dependency cycle(s) with /etf@20140000/out-ports/port/endpoint
| amba 20150000.funnel: Fixed dependency cycle(s) with /etf@20010000/out-ports/port/endpoint
| amba 20150000.funnel: Fixed dependency cycle(s) with /replicator@20120000/in-ports/port/endpoint
| i2c 0-0070: Fixed dependency cycle(s) with /hdlcd@7ff60000/port/endpoint
| i2c 0-0071: Fixed dependency cycle(s) with /hdlcd@7ff50000/port/endpoint
--
Regards,
Sudeep
next prev parent reply other threads:[~2022-08-15 13:53 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-10 6:00 [PATCH v1 0/9] fw_devlink improvements Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 1/9] driver core: fw_devlink: Don't purge child fwnode's consumer links Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 2/9] driver core: fw_devlink: Improve check for fwnode with no device/driver Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 3/9] soc: renesas: Move away from using OF_POPULATED for fw_devlink Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 4/9] gpiolib: Clear the gpio_device's fwnode initialized flag before adding Saravana Kannan
2022-08-15 9:57 ` Bartosz Golaszewski
2022-08-10 6:00 ` [PATCH v1 5/9] driver core: fw_devlink: Add DL_FLAG_CYCLE support to device links Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 6/9] driver core: fw_devlink: Allow marking a fwnode link as being part of a cycle Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 7/9] driver core: fw_devlink: Consolidate device link flag computation Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 8/9] driver core: fw_devlink: Make cycle detection more robust Saravana Kannan
2022-08-10 6:00 ` [PATCH v1 9/9] of: property: Simplify of_link_to_phandle() Saravana Kannan
2022-08-12 9:47 ` Tony Lindgren
2022-08-13 0:37 ` Saravana Kannan
2022-08-15 10:31 ` Tony Lindgren
2022-08-15 21:00 ` Saravana Kannan
2022-08-12 9:49 ` [PATCH v1 0/9] fw_devlink improvements Tony Lindgren
2022-08-13 0:51 ` Saravana Kannan
2022-08-15 10:33 ` Tony Lindgren
2022-08-15 18:23 ` Saravana Kannan
2022-08-18 7:05 ` Tony Lindgren
2022-08-18 15:00 ` Greg Kroah-Hartman
2022-08-14 5:59 ` Saravana Kannan
2022-08-15 10:17 ` Naresh Kamboju
2022-08-15 11:01 ` Abel Vesa
2022-08-15 18:23 ` Saravana Kannan
2022-08-15 12:39 ` Alexander Stein
2022-08-15 19:17 ` Saravana Kannan
2022-08-15 20:56 ` Saravana Kannan
2022-08-16 7:17 ` Alexander Stein
2022-08-16 18:51 ` Saravana Kannan
2022-08-16 7:17 ` Alexander Stein
2022-08-15 13:52 ` Sudeep Holla [this message]
2022-08-17 13:01 ` Geert Uytterhoeven
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