[PATCH v2] drm: bridge: cdns-mhdp8546: fix compile warning

[Daniel Vetter]

On Thu, Oct 01, 2020 at 12:57:46PM +0300, Tomi Valkeinen wrote:
> Hi Dave,
> 
> Can you pick this up to drm-next? Fixes the x64 build warnings for the recent cdns-mhdp-5.10 pull.

Applied, hopefully that's fast enough before sfr does the next round of
linux-next.
-Daniel

> 
>  Tomi
> 
> On 29/09/2020 12:19, Tomi Valkeinen wrote:
> > On x64 we get:
> > 
> > drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c:751:10: warning: conversion from 'long unsigned int' to 'unsigned int' changes value from '18446744073709551613' to '4294967293' [-Woverflow]
> > 
> > The registers are 32 bit, so fix by casting to u32.
> > 
> > Fixes: fb43aa0acdfd ("drm: bridge: Add support for Cadence MHDP8546 DPI/DP bridge")
> > Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
> > Reported-by: Stephen Rothwell <sfr at canb.auug.org.au>
> > Reviewed-by: Swapnil Jakhade <sjakhade at cadence.com>
> > Acked-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> > ---
> > 
> > v2:
> > 
> > No changes to code, added tags.
> > 
> > 
> >  drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
> > index 621ebdbff8a3..d0c65610ebb5 100644
> > --- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
> > +++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
> > @@ -748,7 +748,7 @@ static int cdns_mhdp_fw_activate(const struct firmware *fw,
> >  	 * bridge should already be detached.
> >  	 */
> >  	if (mhdp->bridge_attached)
> > -		writel(~CDNS_APB_INT_MASK_SW_EVENT_INT,
> > +		writel(~(u32)CDNS_APB_INT_MASK_SW_EVENT_INT,
> >  		       mhdp->regs + CDNS_APB_INT_MASK);
> >  
> >  	spin_unlock(&mhdp->start_lock);
> > @@ -1689,7 +1689,7 @@ static int cdns_mhdp_attach(struct drm_bridge *bridge,
> >  
> >  	/* Enable SW event interrupts */
> >  	if (hw_ready)
> > -		writel(~CDNS_APB_INT_MASK_SW_EVENT_INT,
> > +		writel(~(u32)CDNS_APB_INT_MASK_SW_EVENT_INT,
> >  		       mhdp->regs + CDNS_APB_INT_MASK);
> >  
> >  	return 0;
> > @@ -2122,7 +2122,7 @@ static void cdns_mhdp_bridge_hpd_enable(struct drm_bridge *bridge)
> >  
> >  	/* Enable SW event interrupts */
> >  	if (mhdp->bridge_attached)
> > -		writel(~CDNS_APB_INT_MASK_SW_EVENT_INT,
> > +		writel(~(u32)CDNS_APB_INT_MASK_SW_EVENT_INT,
> >  		       mhdp->regs + CDNS_APB_INT_MASK);
> >  }
> >  
> > 
> 
> -- 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch