linux-kernel - Re: [PATCH v2 5/5] drm/rockchip: vop2: Add missing call to crtc reset helper

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Message-ID: <20230622113413.GL18491@pengutronix.de>
Date:   Thu, 22 Jun 2023 13:34:13 +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>,
        Andy Yan <andy.yan@...k-chips.com>,
        Rob Herring <robh@...nel.org>,
        Mark Yao <markyao0591@...il.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.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 v2 5/5] drm/rockchip: vop2: Add missing call to crtc
 reset helper

On Wed, Jun 21, 2023 at 10:33:23PM +0000, Jonas Karlman wrote:
> Add missing call to crtc reset helper to properly vblank reset.
> 
> Also move vop2_crtc_reset and call vop2_crtc_destroy_state to simplify
> and remove duplicated code.
> 
> Fixes: 604be85547ce ("drm/rockchip: Add VOP2 driver")
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> ---
> v2:
> - Add check for allocation failure (Sascha)

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

Sascha

> 
>  drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 31 +++++++++-----------
>  1 file changed, 14 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
> index f725487d02ef..5ba83121a1b9 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
> @@ -2080,23 +2080,6 @@ static const struct drm_crtc_helper_funcs vop2_crtc_helper_funcs = {
>  	.atomic_disable = vop2_crtc_atomic_disable,
>  };
>  
> -static void vop2_crtc_reset(struct drm_crtc *crtc)
> -{
> -	struct rockchip_crtc_state *vcstate = to_rockchip_crtc_state(crtc->state);
> -
> -	if (crtc->state) {
> -		__drm_atomic_helper_crtc_destroy_state(crtc->state);
> -		kfree(vcstate);
> -	}
> -
> -	vcstate = kzalloc(sizeof(*vcstate), GFP_KERNEL);
> -	if (!vcstate)
> -		return;
> -
> -	crtc->state = &vcstate->base;
> -	crtc->state->crtc = crtc;
> -}
> -
>  static struct drm_crtc_state *vop2_crtc_duplicate_state(struct drm_crtc *crtc)
>  {
>  	struct rockchip_crtc_state *vcstate;
> @@ -2123,6 +2106,20 @@ static void vop2_crtc_destroy_state(struct drm_crtc *crtc,
>  	kfree(vcstate);
>  }
>  
> +static void vop2_crtc_reset(struct drm_crtc *crtc)
> +{
> +	struct rockchip_crtc_state *vcstate =
> +		kzalloc(sizeof(*vcstate), GFP_KERNEL);
> +
> +	if (crtc->state)
> +		vop2_crtc_destroy_state(crtc, crtc->state);
> +
> +	if (vcstate)
> +		__drm_atomic_helper_crtc_reset(crtc, &vcstate->base);
> +	else
> +		__drm_atomic_helper_crtc_reset(crtc, NULL);
> +}
> +
>  static const struct drm_crtc_funcs vop2_crtc_funcs = {
>  	.set_config = drm_atomic_helper_set_config,
>  	.page_flip = drm_atomic_helper_page_flip,
> -- 
> 2.41.0
> 
> 

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