linux-kernel - Re: [PATCH v13 01/11] drm/i915: Use 64-bit division macro

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Date:   Fri, 24 Apr 2020 09:17:58 +0300
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     Guru Das Srinagesh <gurus@...eaurora.org>,
        linux-pwm@...r.kernel.org
Cc:     Guru Das Srinagesh <gurus@...eaurora.org>,
        David Collins <collinsd@...eaurora.org>,
        David Airlie <airlied@...ux.ie>,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Subbaraman Narayanamurthy <subbaram@...eaurora.org>
Subject: Re: [PATCH v13 01/11] drm/i915: Use 64-bit division macro

On Tue, 21 Apr 2020, Guru Das Srinagesh <gurus@...eaurora.org> wrote:
> Since the PWM framework is switching struct pwm_state.duty_cycle's
> datatype to u64, prepare for this transition by using DIV_ROUND_UP_ULL
> to handle a 64-bit dividend.
>
> To: Jani Nikula <jani.nikula@...ux.intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
> Cc: David Airlie <airlied@...ux.ie>
> Cc: Daniel Vetter <daniel@...ll.ch>
> Cc: Chris Wilson <chris@...is-wilson.co.uk>
> Cc: "Ville Syrjälä" <ville.syrjala@...ux.intel.com>
> Cc: intel-gfx@...ts.freedesktop.org
> Cc: dri-devel@...ts.freedesktop.org
>

Superfluous blank line.

Anyway, please preserve the existing acks and reviews [1] so people
don't have to do it again.

BR,
Jani.

[1] http://lore.kernel.org/r/87h7yleb0i.fsf@intel.com

> Signed-off-by: Guru Das Srinagesh <gurus@...eaurora.org>
> ---
>  drivers/gpu/drm/i915/display/intel_panel.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
> index 276f438..81547a0 100644
> --- a/drivers/gpu/drm/i915/display/intel_panel.c
> +++ b/drivers/gpu/drm/i915/display/intel_panel.c
> @@ -1920,7 +1920,7 @@ static int pwm_setup_backlight(struct intel_connector *connector,
>  		return retval;
>  	}
>  
> -	level = DIV_ROUND_UP(pwm_get_duty_cycle(panel->backlight.pwm) * 100,
> +	level = DIV_ROUND_UP_ULL(pwm_get_duty_cycle(panel->backlight.pwm) * 100,
>  			     CRC_PMIC_PWM_PERIOD_NS);
>  	panel->backlight.level =
>  		intel_panel_compute_brightness(connector, level);

-- 
Jani Nikula, Intel Open Source Graphics Center