[PATCH] drm/sun4i: Eliminate pointless on stack copy of drm_display_info

[Daniel Vetter]

On Tue, Mar 26, 2019 at 07:38:10PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Just use a pointer to the display_info rather than make a copy
> on stack.
> 
> Cc: Maxime Ripard <maxime.ripard at bootlin.com>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> ---
>  drivers/gpu/drm/sun4i/sun4i_tcon.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
> index fa92e992a282..7ac46483ee78 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
> @@ -482,7 +482,7 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
>  				     const struct drm_display_mode *mode)
>  {
>  	struct drm_connector *connector = sun4i_tcon_get_connector(encoder);
> -	struct drm_display_info display_info = connector->display_info;
> +	const struct drm_display_info *info = &connector->display_info;
>  	unsigned int bp, hsync, vsync;
>  	u8 clk_delay;
>  	u32 val = 0;
> @@ -543,7 +543,7 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
>  	if (mode->flags & DRM_MODE_FLAG_PVSYNC)
>  		val |= SUN4I_TCON0_IO_POL_VSYNC_POSITIVE;
>  
> -	if (display_info.bus_flags & DRM_BUS_FLAG_DE_LOW)
> +	if (info->bus_flags & DRM_BUS_FLAG_DE_LOW)
>  		val |= SUN4I_TCON0_IO_POL_DE_NEGATIVE;
>  
>  	/*
> @@ -561,10 +561,10 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
>  	 * Following code is a way to avoid quirks all around TCON
>  	 * and DOTCLOCK drivers.
>  	 */
> -	if (display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
> +	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
>  		clk_set_phase(tcon->dclk, 240);
>  
> -	if (display_info.bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
> +	if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
>  		clk_set_phase(tcon->dclk, 0);
>  
>  	regmap_update_bits(tcon->regs, SUN4I_TCON0_IO_POL_REG,
> -- 
> 2.19.2
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch