linux-kernel - Re: [PATCH] drm/rockchip: allocate correct crtc state structure on reset

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Date:	Fri, 15 Jul 2016 10:46:38 +0800
From:	Mark yao <mark.yao@...k-chips.com>
To:	John Keeping <john@...anate.com>
Cc:	David Airlie <airlied@...ux.ie>, Heiko Stuebner <heiko@...ech.de>,
	dri-devel@...ts.freedesktop.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] drm/rockchip: allocate correct crtc state structure on
 reset

On 2016年07月14日 23:29, John Keeping wrote:
> Because we are using a custom crtc_state structure, we must override the
> reset helper to allocate the correct amount of memory.
>
> Cc: stable@...r.kernel.org
> Fixes: 4e257d9eee23 ("drm/rockchip: get rid of rockchip_drm_crtc_mode_config")
> Signed-off-by: John Keeping <john@...anate.com>
> ---
>   drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 13 ++++++++++++-
>   1 file changed, 12 insertions(+), 1 deletion(-)
Thanks for the fixes, Applied to my drm-fixes


> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> index 1c4d5b5a70a2..21e1247098be 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
> @@ -1048,6 +1048,17 @@ static void vop_crtc_destroy(struct drm_crtc *crtc)
>   	drm_crtc_cleanup(crtc);
>   }
>   
> +static void vop_crtc_reset(struct drm_crtc *crtc)
> +{
> +	if (crtc->state)
> +		__drm_atomic_helper_crtc_destroy_state(crtc, crtc->state);
> +	kfree(crtc->state);
> +
> +	crtc->state = kzalloc(sizeof(struct rockchip_crtc_state), GFP_KERNEL);
> +	if (crtc->state)
> +		crtc->state->crtc = crtc;
> +}
> +
>   static struct drm_crtc_state *vop_crtc_duplicate_state(struct drm_crtc *crtc)
>   {
>   	struct rockchip_crtc_state *rockchip_state;
> @@ -1073,7 +1084,7 @@ static const struct drm_crtc_funcs vop_crtc_funcs = {
>   	.set_config = drm_atomic_helper_set_config,
>   	.page_flip = drm_atomic_helper_page_flip,
>   	.destroy = vop_crtc_destroy,
> -	.reset = drm_atomic_helper_crtc_reset,
> +	.reset = vop_crtc_reset,
>   	.atomic_duplicate_state = vop_crtc_duplicate_state,
>   	.atomic_destroy_state = vop_crtc_destroy_state,
>   };


-- 
Ｍark Yao