From: Stephen Boyd <sboyd@kernel.org>
To: Daniel Vetter <daniel.vetter@intel.com>,
David Airlie <airlied@linux.ie>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <maxime@cerno.tech>,
Thomas Zimmermann <tzimmermann@suse.de>
Cc: linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org,
linux-rpi-kernel@lists.infradead.org,
Mike Turquette <mturquette@baylibre.com>,
Nicolas Saenz Julienne <nsaenz@kernel.org>,
Florian Fainelli <f.fainelli@gmail.com>,
Michael Stapelberg <michael@stapelberg.ch>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH 2/5] clk: bcm-2835: Remove rounding up the dividers
Date: Thu, 30 Sep 2021 11:09:04 -0700 [thread overview]
Message-ID: <163302534457.358640.9878159260142966969@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <20210922125419.4125779-3-maxime@cerno.tech>
Quoting Maxime Ripard (2021-09-22 05:54:16)
> The driver, once it found a divider, tries to round it up by increasing
> the least significant bit of the fractional part by one when the
> round_up argument is set and there's a remainder.
>
> However, since it increases the divider it will actually reduce the
> clock rate below what we were asking for, leading to issues with
> clk_set_min_rate() that will complain that our rounded clock rate is
> below the minimum of the rate.
>
> Since the dividers are fairly precise already, let's remove that part so
> that we can have clk_set_min_rate() working.
>
> This is effectively a revert of 9c95b32ca093 ("clk: bcm2835: add a round
> up ability to the clock divisor").
>
> Fixes: 9c95b32ca093 ("clk: bcm2835: add a round up ability to the clock divisor")
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> ---
Acked-by: Stephen Boyd <sboyd@kernel.org>
next prev parent reply other threads:[~2021-09-30 18:09 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 12:54 [PATCH 0/5] drm/vc4: hdmi: Remove CPU hangs, take 2 Maxime Ripard
2021-09-22 12:54 ` [PATCH 1/5] clk: bcm-2835: Pick the closest clock rate Maxime Ripard
2021-09-28 16:26 ` nicolas saenz julienne
2021-09-30 18:08 ` Stephen Boyd
2021-10-13 12:59 ` (subset) " Maxime Ripard
2021-09-22 12:54 ` [PATCH 2/5] clk: bcm-2835: Remove rounding up the dividers Maxime Ripard
2021-09-28 16:26 ` nicolas saenz julienne
2021-09-29 13:27 ` Maxime Ripard
2021-09-30 18:09 ` Stephen Boyd [this message]
2021-10-13 12:59 ` (subset) " Maxime Ripard
2021-09-22 12:54 ` [PATCH 3/5] drm/vc4: hdmi: Set a default HSM rate Maxime Ripard
2021-09-30 15:51 ` nicolas saenz julienne
2021-10-13 12:59 ` (subset) " Maxime Ripard
2021-09-22 12:54 ` [PATCH 4/5] drm/vc4: hdmi: Move the HSM clock enable to runtime_pm Maxime Ripard
2021-09-30 15:54 ` nicolas saenz julienne
2021-10-13 12:59 ` (subset) " Maxime Ripard
2021-09-22 12:54 ` [PATCH 5/5] drm/vc4: hdmi: Make sure the controller is powered in detect Maxime Ripard
2021-09-30 15:55 ` nicolas saenz julienne
2021-10-13 12:59 ` (subset) " Maxime Ripard
[not found] ` <CANnVG6kFC7q_dDDp4rRZsJz=paHKy2STn9127LE=JJOf2kW2TA@mail.gmail.com>
2021-09-23 7:05 ` [PATCH 0/5] drm/vc4: hdmi: Remove CPU hangs, take 2 Michael Stapelberg
2021-09-24 7:40 ` Maxime Ripard
2021-09-28 13:05 ` Maxime Ripard
2021-09-30 18:09 ` Stephen Boyd
2021-09-30 18:39 ` Florian Fainelli
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=163302534457.358640.9878159260142966969@swboyd.mtv.corp.google.com \
--to=sboyd@kernel.org \
--cc=airlied@linux.ie \
--cc=daniel.vetter@intel.com \
--cc=f.fainelli@gmail.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-rpi-kernel@lists.infradead.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=maxime@cerno.tech \
--cc=michael@stapelberg.ch \
--cc=mturquette@baylibre.com \
--cc=nsaenz@kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).