linux-kernel - Re: [PATCH -next] drm/bridge: cdns: Remove set but not used variable 'bpp'

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Date:   Fri, 22 Feb 2019 01:30:55 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     Andrzej Hajda <a.hajda@...sung.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH -next] drm/bridge: cdns: Remove set but not used variable
 'bpp'

Hi YueHaibing,

Thank you for the patch.

On Sat, Feb 16, 2019 at 07:34:59AM +0000, YueHaibing wrote:
> Fixes gcc '-Wunused-but-set-variable' warning:
> 
> drivers/gpu/drm/bridge/cdns-dsi.c: In function 'cdns_dsi_bridge_enable':
> drivers/gpu/drm/bridge/cdns-dsi.c:986:6: warning:
>  variable 'bpp' set but not used [-Wunused-but-set-variable]
> 
> It never used since introduction.
> 
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

> ---
>  drivers/gpu/drm/bridge/cdns-dsi.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c b/drivers/gpu/drm/bridge/cdns-dsi.c
> index 6166dca6be81..07ee1685fdfe 100644
> --- a/drivers/gpu/drm/bridge/cdns-dsi.c
> +++ b/drivers/gpu/drm/bridge/cdns-dsi.c
> @@ -785,13 +785,12 @@ static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
>  	unsigned long tx_byte_period;
>  	struct cdns_dsi_cfg dsi_cfg;
>  	u32 tmp, reg_wakeup, div;
> -	int bpp, nlanes;
> +	int nlanes;
>  
>  	if (WARN_ON(pm_runtime_get_sync(dsi->base.dev) < 0))
>  		return;
>  
>  	mode = &bridge->encoder->crtc->state->adjusted_mode;
> -	bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
>  	nlanes = output->dev->lanes;
>  
>  	WARN_ON_ONCE(cdns_dsi_check_conf(dsi, mode, &dsi_cfg, false));

-- 
Regards,

Laurent Pinchart