linux-kernel - Re: [PATCH 1/4] drm/rockchip: vop: Fix reset of state in duplicate state crtc funcs

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Message-ID: <20230621080535.GV18491@pengutronix.de>
Date:   Wed, 21 Jun 2023 10:05:35 +0200
From:   Sascha Hauer <s.hauer@...gutronix.de>
To:     Jonas Karlman <jonas@...boo.se>
Cc:     Sandy Huang <hjc@...k-chips.com>, Heiko Stuebner <heiko@...ech.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Mark Yao <markyao0591@...il.com>,
        Andy Yan <andy.yan@...k-chips.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] drm/rockchip: vop: Fix reset of state in duplicate
 state crtc funcs

On Tue, Jun 20, 2023 at 06:47:36AM +0000, Jonas Karlman wrote:
> struct rockchip_crtc_state members such as output_type, output_bpc and
> enable_afbc is always reset to zero in the atomic_duplicate_state crtc
> funcs.
> 
> Fix this by using kmemdup on the subclass rockchip_crtc_state struct.
> 
> Fixes: 4e257d9eee23 ("drm/rockchip: get rid of rockchip_drm_crtc_mode_config")
> Signed-off-by: Jonas Karlman <jonas@...boo.se>

Reviewed-by: Sascha Hauer <s.hauer@...gutronix.de>

Sascha

> ---
>  drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index a530ecc4d207..60b23636a3fe 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -1614,7 +1614,8 @@ static struct drm_crtc_state *vop_crtc_duplicate_state(struct drm_crtc *crtc)
>  	if (WARN_ON(!crtc->state))
>  		return NULL;
>  
> -	rockchip_state = kzalloc(sizeof(*rockchip_state), GFP_KERNEL);
> +	rockchip_state = kmemdup(to_rockchip_crtc_state(crtc->state),
> +				 sizeof(*rockchip_state), GFP_KERNEL);
>  	if (!rockchip_state)
>  		return NULL;
>  
> -- 
> 2.41.0
> 
> 

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