From: Naresh Kamboju <naresh.kamboju@linaro.org>
To: Saravana Kannan <saravanak@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"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>,
Sudeep Holla <sudeep.holla@arm.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 15:47:59 +0530 [thread overview]
Message-ID: <CA+G9fYuUbEiGNpVsSsVcSmB3azaYKs8WrSCP1z1wx6dJKhB5Jw@mail.gmail.com> (raw)
In-Reply-To: <CAGETcx_nVXbHzZ3+_aR4SZtSnSBU=Rfp8Qm2jOs7zGZRaH_88A@mail.gmail.com>
On Sun, 14 Aug 2022 at 11:29, Saravana Kannan <saravanak@google.com> wrote:
>
> +Naresh Kamboju
>
> On Tue, Aug 9, 2022 at 11:00 PM Saravana Kannan <saravanak@google.com> 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.
> >
> > Guenter,
> >
> > I don't think this will fix the issue you reported in the amba patch, but
> > it's worth a shot because it improves a bunch of corner case handling. So
> > it might be better at handling whatever corner cases you might have in the
> > qemu platforms.
>
> Hi Naresh,
>
> Thanks for testing these patches in the other thread. Mind giving your
> tested-by here? I know you tested these patches in X15, but were there
> also other boards these patches were tested on as part of the run?
I have tested your patches and boot is successful on x15 device and Juno-r2.
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> > Cc: Abel Vesa <abel.vesa@linaro.org>
> > Cc: Alexander Stein <alexander.stein@ew.tq-group.com>
> > Cc: Tony Lindgren <tony@atomide.com>
> > Cc: Sudeep Holla <sudeep.holla@arm.com>
> > Cc: Geert Uytterhoeven <geert@linux-m68k.org>
> > Cc: John Stultz <jstultz@google.com>
> > Cc: Doug Anderson <dianders@chromium.org>
> > Cc: Guenter Roeck <linux@roeck-us.net>
> >
> > Saravana Kannan (9):
> > driver core: fw_devlink: Don't purge child fwnode's consumer links
> > driver core: fw_devlink: Improve check for fwnode with no
> > device/driver
> > soc: renesas: Move away from using OF_POPULATED for fw_devlink
> > gpiolib: Clear the gpio_device's fwnode initialized flag before adding
> > driver core: fw_devlink: Add DL_FLAG_CYCLE support to device links
> > driver core: fw_devlink: Allow marking a fwnode link as being part of
> > a cycle
> > driver core: fw_devlink: Consolidate device link flag computation
> > driver core: fw_devlink: Make cycle detection more robust
> > of: property: Simplify of_link_to_phandle()
> >
> > drivers/base/core.c | 437 +++++++++++++++++++++-----------
> > drivers/gpio/gpiolib.c | 6 +
> > drivers/of/property.c | 84 +-----
> > drivers/soc/renesas/rcar-sysc.c | 2 +-
> > include/linux/device.h | 1 +
> > include/linux/fwnode.h | 12 +-
> > 6 files changed, 323 insertions(+), 219 deletions(-)
> >
> > --
> > 2.37.1.559.g78731f0fdb-goog
- Naresh
next prev parent reply other threads:[~2022-08-15 10:18 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 [this message]
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
2022-08-17 13:01 ` Geert Uytterhoeven
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