From: Sudeep Holla <sudeep.holla@arm.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Sudeep Holla <sudeep.holla@arm.com>,
ALKML <linux-arm-kernel@lists.infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
DTML <devicetree@vger.kernel.org>,
Roy Franz <roy.franz@cavium.com>,
Harb Abdulhamid <harba@codeaurora.org>,
Nishanth Menon <nm@ti.com>, Loc Ho <lho@apm.com>,
Alexey Klimov <alexey.klimov@arm.com>,
Ryan Harkin <Ryan.Harkin@arm.com>,
Jassi Brar <jassisinghbrar@gmail.com>
Subject: Re: [PATCH v3 16/22] firmware: arm_scmi: add arm_mhu specific mailbox interface
Date: Wed, 4 Oct 2017 12:48:01 +0100 [thread overview]
Message-ID: <f08a0355-ecbb-e685-4061-c9253440b390@arm.com> (raw)
In-Reply-To: <CAK8P3a0XmiXqZ-z7WV+nk7B86p23Jmf31Q=pVovXVebhA28_0Q@mail.gmail.com>
On 04/10/17 12:36, Arnd Bergmann wrote:
> On Thu, Sep 28, 2017 at 3:11 PM, Sudeep Holla <sudeep.holla@arm.com> wrote:
>> This patch adds ARM MHU specific mailbox interface for SCMI.
>>
>> Cc: Arnd Bergmann <arnd@arndb.de>
>> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
>
> This clearly needs an explanation why we need another driver.
>
Yes, I understand. I myself is not convinced that we need one. Jassi
disagrees to add support to use each bit as doorbell in the ARM MHU
driver though the MHU specification states it clearly(3.4.4 Message
Handling Unit (MHU) of Juno TRM)[1].
This shim was added to deal with that with I agree is wrong IMO but
Jassi thinks that's right way to deal with it.
--
Regards,
Sudeep
[1]
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0515f/DDI0515F_juno_arm_development_platform_soc_trm.pdf
WARNING: multiple messages have this Message-ID (diff)
From: Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org>
To: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org>,
ALKML
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
DTML <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Roy Franz <roy.franz-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org>,
Harb Abdulhamid <harba-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
Nishanth Menon <nm-l0cyMroinI0@public.gmane.org>,
Loc Ho <lho-qTEPVZfXA3Y@public.gmane.org>,
Alexey Klimov <alexey.klimov-5wv7dgnIgG8@public.gmane.org>,
Ryan Harkin <Ryan.Harkin-5wv7dgnIgG8@public.gmane.org>,
Jassi Brar
<jassisinghbrar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCH v3 16/22] firmware: arm_scmi: add arm_mhu specific mailbox interface
Date: Wed, 4 Oct 2017 12:48:01 +0100 [thread overview]
Message-ID: <f08a0355-ecbb-e685-4061-c9253440b390@arm.com> (raw)
In-Reply-To: <CAK8P3a0XmiXqZ-z7WV+nk7B86p23Jmf31Q=pVovXVebhA28_0Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On 04/10/17 12:36, Arnd Bergmann wrote:
> On Thu, Sep 28, 2017 at 3:11 PM, Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org> wrote:
>> This patch adds ARM MHU specific mailbox interface for SCMI.
>>
>> Cc: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
>> Signed-off-by: Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org>
>
> This clearly needs an explanation why we need another driver.
>
Yes, I understand. I myself is not convinced that we need one. Jassi
disagrees to add support to use each bit as doorbell in the ARM MHU
driver though the MHU specification states it clearly(3.4.4 Message
Handling Unit (MHU) of Juno TRM)[1].
This shim was added to deal with that with I agree is wrong IMO but
Jassi thinks that's right way to deal with it.
--
Regards,
Sudeep
[1]
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0515f/DDI0515F_juno_arm_development_platform_soc_trm.pdf
--
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WARNING: multiple messages have this Message-ID (diff)
From: sudeep.holla@arm.com (Sudeep Holla)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 16/22] firmware: arm_scmi: add arm_mhu specific mailbox interface
Date: Wed, 4 Oct 2017 12:48:01 +0100 [thread overview]
Message-ID: <f08a0355-ecbb-e685-4061-c9253440b390@arm.com> (raw)
In-Reply-To: <CAK8P3a0XmiXqZ-z7WV+nk7B86p23Jmf31Q=pVovXVebhA28_0Q@mail.gmail.com>
On 04/10/17 12:36, Arnd Bergmann wrote:
> On Thu, Sep 28, 2017 at 3:11 PM, Sudeep Holla <sudeep.holla@arm.com> wrote:
>> This patch adds ARM MHU specific mailbox interface for SCMI.
>>
>> Cc: Arnd Bergmann <arnd@arndb.de>
>> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
>
> This clearly needs an explanation why we need another driver.
>
Yes, I understand. I myself is not convinced that we need one. Jassi
disagrees to add support to use each bit as doorbell in the ARM MHU
driver though the MHU specification states it clearly(3.4.4 Message
Handling Unit (MHU) of Juno TRM)[1].
This shim was added to deal with that with I agree is wrong IMO but
Jassi thinks that's right way to deal with it.
--
Regards,
Sudeep
[1]
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0515f/DDI0515F_juno_arm_development_platform_soc_trm.pdf
next prev parent reply other threads:[~2017-10-04 11:48 UTC|newest]
Thread overview: 208+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-28 13:11 [PATCH v3 00/22] firmware: ARM System Control and Management Interface(SCMI) support Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 01/22] dt-bindings: mailbox: add support for mailbox client shared memory Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 02/22] dt-bindings: arm: add support for ARM System Control and Management Interface(SCMI) protocol Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-04 10:50 ` Arnd Bergmann
2017-10-04 10:50 ` Arnd Bergmann
2017-10-04 10:50 ` Arnd Bergmann
2017-10-04 11:07 ` Sudeep Holla
2017-10-04 11:07 ` Sudeep Holla
2017-10-04 11:07 ` Sudeep Holla
2017-10-04 12:35 ` Arnd Bergmann
2017-10-04 12:35 ` Arnd Bergmann
2017-10-04 12:35 ` Arnd Bergmann
2017-10-04 13:53 ` Sudeep Holla
2017-10-04 13:53 ` Sudeep Holla
2017-10-04 13:53 ` Sudeep Holla
2017-10-04 14:17 ` Arnd Bergmann
2017-10-04 14:17 ` Arnd Bergmann
2017-10-04 14:17 ` Arnd Bergmann
2017-10-04 14:47 ` Sudeep Holla
2017-10-04 14:47 ` Sudeep Holla
2017-10-04 14:47 ` Sudeep Holla
2017-10-05 11:56 ` Arnd Bergmann
2017-10-05 11:56 ` Arnd Bergmann
2017-10-05 11:56 ` Arnd Bergmann
2017-10-05 12:56 ` Sudeep Holla
2017-10-05 12:56 ` Sudeep Holla
2017-10-05 13:20 ` Jassi Brar
2017-10-05 13:20 ` Jassi Brar
2017-10-05 14:10 ` Sudeep Holla
2017-10-05 14:10 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 03/22] dt-bindings: arm: scmi: add ARM MHU specific mailbox client bindings Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-05 23:20 ` Rob Herring
2017-10-05 23:20 ` Rob Herring
2017-10-05 23:20 ` Rob Herring
2017-10-06 9:42 ` Sudeep Holla
2017-10-06 9:42 ` Sudeep Holla
2017-10-06 11:01 ` Jassi Brar
2017-10-06 11:01 ` Jassi Brar
2017-10-06 11:01 ` Jassi Brar
2017-10-06 15:54 ` Rob Herring
2017-10-06 15:54 ` Rob Herring
2017-10-07 2:26 ` Jassi Brar
2017-10-07 2:26 ` Jassi Brar
2017-10-09 13:52 ` Rob Herring
2017-10-09 13:52 ` Rob Herring
2017-10-09 14:37 ` Sudeep Holla
2017-10-09 14:37 ` Sudeep Holla
2017-10-09 14:37 ` Sudeep Holla
2017-10-09 14:46 ` Jassi Brar
2017-10-09 14:46 ` Jassi Brar
2017-10-09 14:46 ` Jassi Brar
2017-10-09 22:57 ` Rob Herring
2017-10-09 22:57 ` Rob Herring
2017-10-09 22:57 ` Rob Herring
2017-10-10 1:52 ` Jassi Brar
2017-10-10 1:52 ` Jassi Brar
2017-10-10 11:04 ` Sudeep Holla
2017-10-10 11:04 ` Sudeep Holla
2017-10-10 11:04 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 04/22] firmware: arm_scmi: add basic driver infrastructure for SCMI Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-04 10:59 ` Arnd Bergmann
2017-10-04 10:59 ` Arnd Bergmann
2017-10-04 10:59 ` Arnd Bergmann
2017-10-04 17:37 ` Sudeep Holla
2017-10-04 17:37 ` Sudeep Holla
2017-10-04 17:37 ` Sudeep Holla
2017-10-04 11:19 ` Arnd Bergmann
2017-10-04 11:19 ` Arnd Bergmann
2017-10-04 11:19 ` Arnd Bergmann
2017-09-28 13:11 ` [PATCH v3 05/22] firmware: arm_scmi: add common infrastructure and support for base protocol Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 06/22] firmware: arm_scmi: add initial support for performance protocol Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 07/22] firmware: arm_scmi: add initial support for clock protocol Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 08/22] firmware: arm_scmi: add initial support for power protocol Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 09/22] firmware: arm_scmi: add initial support for sensor protocol Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 10/22] firmware: arm_scmi: probe and initialise all the supported protocols Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-04 11:06 ` Arnd Bergmann
2017-10-04 11:06 ` Arnd Bergmann
2017-10-04 11:06 ` Arnd Bergmann
2017-09-28 13:11 ` [PATCH v3 11/22] firmware: arm_scmi: add support for polling based SCMI transfers Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-04 11:13 ` Arnd Bergmann
2017-10-04 11:13 ` Arnd Bergmann
2017-10-04 11:13 ` Arnd Bergmann
2017-10-04 11:18 ` Sudeep Holla
2017-10-04 11:18 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 12/22] firmware: arm_scmi: add option for polling based performance domain operations Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 13/22] firmware: arm_scmi: refactor in preparation to support per-protocol channels Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 14/22] firmware: arm_scmi: add per-protocol channels support using idr objects Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 15/22] firmware: arm_scmi: abstract mailbox interface Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-04 11:24 ` Arnd Bergmann
2017-10-04 11:24 ` Arnd Bergmann
2017-10-04 11:24 ` Arnd Bergmann
2017-10-04 11:32 ` Sudeep Holla
2017-10-04 11:32 ` Sudeep Holla
2017-10-04 11:32 ` Sudeep Holla
2017-10-06 11:34 ` Jassi Brar
2017-10-06 11:34 ` Jassi Brar
2017-10-06 11:34 ` Jassi Brar
2017-10-06 13:27 ` Sudeep Holla
2017-10-06 13:27 ` Sudeep Holla
2017-10-06 13:27 ` Sudeep Holla
2017-10-06 13:34 ` Jassi Brar
2017-10-06 13:34 ` Jassi Brar
2017-10-06 13:41 ` Sudeep Holla
2017-10-06 13:41 ` Sudeep Holla
2017-10-12 21:20 ` Bjorn Andersson
2017-10-12 21:20 ` Bjorn Andersson
2017-09-28 13:11 ` [PATCH v3 16/22] firmware: arm_scmi: add arm_mhu specific " Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-04 11:36 ` Arnd Bergmann
2017-10-04 11:36 ` Arnd Bergmann
2017-10-04 11:48 ` Sudeep Holla [this message]
2017-10-04 11:48 ` Sudeep Holla
2017-10-04 11:48 ` Sudeep Holla
2017-10-06 11:26 ` Jassi Brar
2017-10-06 11:26 ` Jassi Brar
2017-10-06 11:26 ` Jassi Brar
2017-10-06 13:32 ` Sudeep Holla
2017-10-06 13:32 ` Sudeep Holla
2017-10-06 13:47 ` Jassi Brar
2017-10-06 13:47 ` Jassi Brar
2017-10-06 13:47 ` Jassi Brar
2017-10-06 13:51 ` Sudeep Holla
2017-10-06 13:51 ` Sudeep Holla
2017-10-06 13:51 ` Sudeep Holla
2017-10-12 21:03 ` Bjorn Andersson
2017-10-12 21:03 ` Bjorn Andersson
2017-10-13 13:42 ` Sudeep Holla
2017-10-13 13:42 ` Sudeep Holla
2017-10-13 13:42 ` Sudeep Holla
2017-10-13 14:12 ` Jassi Brar
2017-10-13 14:12 ` Jassi Brar
2017-10-13 14:12 ` Jassi Brar
2017-10-13 14:47 ` Sudeep Holla
2017-10-13 14:47 ` Sudeep Holla
2017-10-13 15:19 ` Jassi Brar
2017-10-13 15:19 ` Jassi Brar
2017-10-13 15:19 ` Jassi Brar
2017-09-28 13:11 ` [PATCH v3 17/22] firmware: arm_scmi: add device power domain support using genpd Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-09-28 21:18 ` Ulf Hansson
2017-09-28 21:18 ` Ulf Hansson
2017-09-29 13:40 ` Sudeep Holla
2017-09-29 13:40 ` Sudeep Holla
2017-09-29 13:40 ` Sudeep Holla
2017-09-29 13:42 ` [PATCH v3 17/22][UPDATE] firmware: arm_scmi: add device power domain support genpd Sudeep Holla
2017-09-29 13:42 ` Sudeep Holla
2017-09-29 13:42 ` Sudeep Holla
2017-10-10 11:05 ` Ulf Hansson
2017-10-10 11:05 ` Ulf Hansson
2017-10-10 13:02 ` Sudeep Holla
2017-10-10 13:02 ` Sudeep Holla
2017-10-10 13:02 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 18/22] clk: add support for clocks provided by SCMI Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-11-02 7:23 ` Stephen Boyd
2017-11-02 7:23 ` Stephen Boyd
2017-11-02 7:23 ` Stephen Boyd
2017-11-02 10:04 ` Sudeep Holla
2017-11-02 10:04 ` Sudeep Holla
2017-11-02 10:04 ` Sudeep Holla
2017-11-03 15:12 ` Stephen Boyd
2017-11-03 15:12 ` Stephen Boyd
2017-11-03 15:12 ` Stephen Boyd
2017-09-28 13:11 ` [PATCH v3 19/22] hwmon: (core) Add hwmon_max to hwmon_sensor_types enumeration Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-01 14:21 ` [v3, " Guenter Roeck
2017-10-01 14:21 ` Guenter Roeck
2017-09-28 13:11 ` [PATCH v3 20/22] hwmon: add support for sensors exported via ARM SCMI Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-01 14:26 ` [v3,20/22] " Guenter Roeck
2017-10-01 14:26 ` Guenter Roeck
2017-10-02 9:25 ` Sudeep Holla
2017-10-02 9:25 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 21/22] cpufreq: add support for CPU DVFS based on SCMI message protocol Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
2017-10-04 11:30 ` Arnd Bergmann
2017-10-04 11:30 ` Arnd Bergmann
2017-10-04 11:30 ` Arnd Bergmann
2017-10-04 15:01 ` Sudeep Holla
2017-10-04 15:01 ` Sudeep Holla
2017-10-05 11:20 ` Arnd Bergmann
2017-10-05 11:20 ` Arnd Bergmann
2017-10-05 11:20 ` Arnd Bergmann
2017-10-05 11:26 ` Sudeep Holla
2017-10-05 11:26 ` Sudeep Holla
2017-10-05 11:26 ` Sudeep Holla
2017-09-28 13:11 ` [PATCH v3 22/22] cpufreq: scmi: add support for fast frequency switching Sudeep Holla
2017-09-28 13:11 ` Sudeep Holla
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