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From: Rajendra Nayak <>
To: Rob Herring <>
Cc: Stanimir Varbanov <>,
	Andy Gross <>,
	Bjorn Andersson <>,
	linux-arm-msm <>,
	Linux Media Mailing List <>,,
	"" <>,
	Matthias Kaehlcke <>
Subject: Re: [PATCH v2 1/4] dt-bindings: media: venus: Add an optional power domain for perf voting
Date: Mon, 20 Jul 2020 09:59:05 +0530	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On 7/18/2020 12:26 AM, Rob Herring wrote:
> On Thu, Jul 16, 2020 at 11:52 PM Rajendra Nayak <> wrote:
>> On 7/17/2020 1:29 AM, Rob Herring wrote:
>>> On Thu, Jul 16, 2020 at 11:12:16AM +0530, Rajendra Nayak wrote:
>>>> Add an optional power domain which when specified can be used for
>>>> setting the performance state of Venus.
>>> The h/w suddenly grew a new power island/domain? Seems like an abuse of
>>> power-domains...
>> The power-domain always existed, we have just managed to survive without
>> having venus support DVFS and have the domain always be at a high performance
>> level (set statically by boot code)
>> Now, if we care to do DVFS and support better PM on the SoC, its important
>> for the devices to manage this additional power domain (and dynamically
>> scale it)
>> That said, if the name 'opp-pd' makes it look like a software construct,
>> like Bjorn mentioned, I am fine to give it a real name like 'cx-pd'
>> Does that sound good?
> He suggested 'cx' as '-pd' would be redundant. I have no idea what
> 'cx' means, but fine.
>> PS: Like I mentioned earlier [1], cx is a shared power island,
>> not a power island specific to this block, and definitely not a software
>> pm-domain construct.
> Put this context/detail into your patches. Assume I don't remember
> what happened last week.

Thanks Rob, will do when I re-post shortly.

> Unfortunately, gmail seems to have no way to filter on unread mails in
> reply to my replies and doesn't move the thread up in 'Sent' filter,
> so older threads get lost.
> Rob
>> [1]

QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation

  reply	other threads:[~2020-07-20  4:29 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-16  5:42 [PATCH v2 0/4] DVFS support for Venus Rajendra Nayak
2020-07-16  5:42 ` [PATCH v2 1/4] dt-bindings: media: venus: Add an optional power domain for perf voting Rajendra Nayak
2020-07-16 19:59   ` Rob Herring
2020-07-17  5:52     ` Rajendra Nayak
2020-07-17 18:56       ` Rob Herring
2020-07-20  4:29         ` Rajendra Nayak [this message]
2020-07-16 23:43   ` Bjorn Andersson
2020-07-17  5:13     ` Rajendra Nayak
2020-07-16  5:42 ` [PATCH v2 2/4] media: venus: core: Add support for opp tables/perf voting Rajendra Nayak
2020-07-16  5:42 ` [PATCH v2 3/4] arm64: dts: sdm845: Add OPP tables and power-domains for venus Rajendra Nayak
2020-07-16  5:42 ` [PATCH v2 4/4] arm64: dts: sc7180: " Rajendra Nayak

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