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From: Daniel Thompson <daniel.thompson@linaro.org>
To: kgunda@codeaurora.org
Cc: bjorn.andersson@linaro.org, jingoohan1@gmail.com,
	lee.jones@linaro.org, b.zolnierkie@samsung.com,
	dri-devel@lists.freedesktop.org, jacek.anaszewski@gmail.com,
	pavel@ucw.cz, robh+dt@kernel.org, mark.rutland@arm.com,
	linux-leds@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, Andy Gross <agross@kernel.org>,
	linux-arm-msm@vger.kernel.org, linux-fbdev@vger.kernel.org,
	phone-devel@vger.kernel.org
Subject: Re: [PATCH V2 2/2] backlight: qcom-wled: Correct the sync_toggle sequence
Date: Mon, 1 Mar 2021 09:39:02 +0000	[thread overview]
Message-ID: <20210301093902.34mtfcouajc36y6t@maple.lan> (raw)
In-Reply-To: <0cca377c2a7648c5f1606e38ba1b7d4d@codeaurora.org>

On Mon, Mar 01, 2021 at 02:15:12PM +0530, kgunda@codeaurora.org wrote:
> On 2021-02-26 22:56, Daniel Thompson wrote:
> > On Fri, Feb 26, 2021 at 05:42:24PM +0530, Kiran Gunda wrote:
> > > As per the current implementation, after FSC (Full Scale Current)
> > > and brightness update the sync bits are transitioned from 1 to 0.
> > 
> > This still seems to incorrectly describe the current behaviour.
> > 
> > Surely in most cases (i.e. every time except the first) the value of the
> > sync bit is 0 when the function is called and we get both a 0 to 1
> > and then a 1 to 0 transition.
> > 
> > That is why I recommended set-then-clear terminology to describe the
> > current behaviour. It is concise and correct.
>
> Okay. Actually I have mentioned the "clear-and-set" in explaining the fix.
> Let me modify the same terminology in explaining the problem case also.

Yes please.

In my original review I took time to explain why patch descriptions
require care and attention and, also, why expressing the original behaviour
as 1 to 0 was inadequate. Based on the previous feedback (and reply) I
was rather surprised that the problem was only half corrected in the
next revision.


Daniel.

      reply	other threads:[~2021-03-01  9:40 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-26 12:12 [PATCH V2 0/2] Fix WLED FSC Sync and brightness Sync settings Kiran Gunda
2021-02-26 12:12 ` [PATCH V2 1/2] backlight: qcom-wled: Fix FSC update issue for WLED5 Kiran Gunda
2021-02-26 17:09   ` Daniel Thompson
2021-02-26 12:12 ` [PATCH V2 2/2] backlight: qcom-wled: Correct the sync_toggle sequence Kiran Gunda
2021-02-26 17:26   ` Daniel Thompson
2021-03-01  8:45     ` kgunda
2021-03-01  9:39       ` Daniel Thompson [this message]

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