[v9,01/11] drm/i915: Use 64-bit division macro

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.

Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
---
 drivers/gpu/drm/i915/display/intel_panel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

On Tue, 17 Mar 2020, Guru Das Srinagesh <gurus@codeaurora.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.
>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: David Airlie <airlied@linux.ie>
> Cc: Daniel Vetter <daniel@ffwll.ch>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
> Cc: intel-gfx@lists.freedesktop.org
> Cc: dri-devel@lists.freedesktop.org
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
>
> Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Also ack for merging this via whichever tree you prefer; please let me
know if you want me to take this via drm-intel.

> ---
>  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 bc14e9c..843cac1 100644
> --- a/drivers/gpu/drm/i915/display/intel_panel.c
> +++ b/drivers/gpu/drm/i915/display/intel_panel.c
> @@ -1868,7 +1868,7 @@ static int pwm_setup_backlight(struct intel_connector *connector,
>  
>  	panel->backlight.min = 0; /* 0% */
>  	panel->backlight.max = 100; /* 100% */
> -	panel->backlight.level = DIV_ROUND_UP(
> +	panel->backlight.level = DIV_ROUND_UP_ULL(
>  				 pwm_get_duty_cycle(panel->backlight.pwm) * 100,
>  				 CRC_PMIC_PWM_PERIOD_NS);
>  	panel->backlight.enabled = panel->backlight.level != 0;

On Wed, Mar 18, 2020 at 09:08:45PM +0200, Jani Nikula wrote:
> On Tue, 17 Mar 2020, Guru Das Srinagesh <gurus@codeaurora.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.
> >
> > Cc: Jani Nikula <jani.nikula@linux.intel.com>
> > Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> > Cc: David Airlie <airlied@linux.ie>
> > Cc: Daniel Vetter <daniel@ffwll.ch>
> > Cc: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
> > Cc: intel-gfx@lists.freedesktop.org
> > Cc: dri-devel@lists.freedesktop.org
> > Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> > Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> >
> > Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
> 
> Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Thanks!

> Also ack for merging this via whichever tree you prefer; please let me
> know if you want me to take this via drm-intel.

I'm not sure if this patch can be taken via drm-intel in isolation as it
is part of a series... Will let you know if I need to make such a
request.

Thank you.

Guru Das.