linux-arm-kernel.lists.infradead.org archive mirror
 help / color / mirror / Atom feed
From: Sam Ravnborg <sam@ravnborg.org>
To: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: alexandre.belloni@bootlin.com, airlied@linux.ie,
	dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	boris.brezillon@bootlin.com, lee.jones@linaro.org,
	peda@axentia.se, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3 5/6] drm: atmel-hlcdc: prefer a lower pixel-clock than requested
Date: Sat, 4 Jan 2020 18:12:05 +0100	[thread overview]
Message-ID: <20200104171205.GA8724@ravnborg.org> (raw)
In-Reply-To: <20200102090848.GC29446@ravnborg.org>

Hi Claudiu

On Thu, Jan 02, 2020 at 10:08:48AM +0100, Sam Ravnborg wrote:
> On Wed, Dec 18, 2019 at 02:28:28PM +0200, Claudiu Beznea wrote:
> > From: Peter Rosin <peda@axentia.se>
> > 
> > The intention was to only select a higher pixel-clock rate than the
> > requested, if a slight overclocking would result in a rate significantly
> > closer to the requested rate than if the conservative lower pixel-clock
> > rate is selected. The fixed patch has the logic the other way around and
> > actually prefers the higher frequency. Fix that.
> > 
> > Fixes: f6f7ad323461 ("drm/atmel-hlcdc: allow selecting a higher pixel-clock than requested")
> The id is wrong here - the right one is: 9946a3a9dbedaaacef8b7e94f6ac144f1daaf1de
> The wrong id above was used before - so I think it is a copy'n'paste
> thing.
> 
> Hint: try "dim fixes 9946a3a9dbedaaacef8b7e94f6ac144f1daaf1de"
> 
> If I get a quick response from Lee I can fix it up while applying.
> 
> 	Sam
> 
> > Reported-by: Claudiu Beznea <claudiu.beznea@microchip.com>
> > Tested-by: Claudiu Beznea <claudiu.beznea@microchip.com>
> > Signed-off-by: Peter Rosin <peda@axentia.se>

One other detail.
The patch has passed through your hands, so you have to add your s-o-b
to document this.
The chain of s-o-b shall document the path the patch has taken towards
the kernel.

In this case:
Peter => Claudiu => Sam => Applied.

Please resend or reply where you say OK that I add your s-o-b.

PS. And happy new year!

	Sam


> > ---
> >  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> > index 721fa88bf71d..10985134ce0b 100644
> > --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> > +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c
> > @@ -121,8 +121,8 @@ static void atmel_hlcdc_crtc_mode_set_nofb(struct drm_crtc *c)
> >  		int div_low = prate / mode_rate;
> >  
> >  		if (div_low >= 2 &&
> > -		    ((prate / div_low - mode_rate) <
> > -		     10 * (mode_rate - prate / div)))
> > +		    (10 * (prate / div_low - mode_rate) <
> > +		     (mode_rate - prate / div)))
> >  			/*
> >  			 * At least 10 times better when using a higher
> >  			 * frequency than requested, instead of a lower.
> > -- 
> > 2.7.4
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2020-01-04 17:12 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-18 12:28 [PATCH v3 0/6] fixes for atmel-hlcdc Claudiu Beznea
2019-12-18 12:28 ` [PATCH v3 1/6] drm: atmel-hlcdc: use double rate for pixel clock only if supported Claudiu Beznea
2019-12-18 12:28 ` [PATCH v3 2/6] drm: atmel-hlcdc: enable clock before configuring timing engine Claudiu Beznea
2019-12-18 12:28 ` [PATCH v3 3/6] mfd: atmel-hlcdc: add struct device member to struct atmel_hlcdc_regmap Claudiu Beznea
2019-12-18 12:28 ` [PATCH v3 4/6] mfd: atmel-hlcdc: return in case of error Claudiu Beznea
2020-01-07 10:18   ` Lee Jones
2019-12-18 12:28 ` [PATCH v3 5/6] drm: atmel-hlcdc: prefer a lower pixel-clock than requested Claudiu Beznea
2020-01-02  9:08   ` Sam Ravnborg
2020-01-04 17:12     ` Sam Ravnborg [this message]
2020-01-06  9:25       ` Claudiu.Beznea
2020-01-06 19:02         ` Sam Ravnborg
2020-01-06  9:24     ` Claudiu.Beznea
2020-01-07  9:19       ` Peter Rosin
2019-12-18 12:28 ` [PATCH v3 6/6] Revert "drm: atmel-hlcdc: enable sys_clk during initalization." Claudiu Beznea
2020-01-02  9:05 ` [PATCH v3 0/6] fixes for atmel-hlcdc Sam Ravnborg
2020-01-02 16:05   ` Lee Jones
2020-01-02 16:21     ` Sam Ravnborg
2020-01-06 19:37 ` Sam Ravnborg
2020-01-07 10:17 ` [GIT PULL] Immutable branch between MFD and DRM due for the v5.6 merge window Lee Jones
2020-01-07 18:21   ` Sam Ravnborg

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=20200104171205.GA8724@ravnborg.org \
    --to=sam@ravnborg.org \
    --cc=airlied@linux.ie \
    --cc=alexandre.belloni@bootlin.com \
    --cc=boris.brezillon@bootlin.com \
    --cc=claudiu.beznea@microchip.com \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=lee.jones@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=peda@axentia.se \
    /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).