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@kwiboo.se>
---
 drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 28 ++++++++------------
 1 file changed, 11 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..1be84fe0208f 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 +2106,17 @@ 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);
+
+	__drm_atomic_helper_crtc_reset(crtc, &vcstate->base);
+}
+
 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

On Tue, Jun 20, 2023 at 06:47:39AM +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@kwiboo.se>
> ---
>  drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 28 ++++++++------------
>  1 file changed, 11 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..1be84fe0208f 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 +2106,17 @@ 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);
> +
> +	__drm_atomic_helper_crtc_reset(crtc, &vcstate->base);
> +}

You missed to check for allocation failures before using vcstate.

Sascha

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On 2023-06-21 10:11, Sascha Hauer wrote:
> On Tue, Jun 20, 2023 at 06:47:39AM +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@kwiboo.se>
>> ---
>>  drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 28 ++++++++------------
>>  1 file changed, 11 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..1be84fe0208f 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 +2106,17 @@ 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);
>> +
>> +	__drm_atomic_helper_crtc_reset(crtc, &vcstate->base);
>> +}
> 
> You missed to check for allocation failures before using vcstate.

Good catch, I will fix for both vop and vop2 driver in v2.

Regards,
Jonas

> 
> Sascha
>