Re: [PATCH 10/17] drm/msm: Convert to using __drm_atomic_helper_crtc_reset() for reset.

[Sean Paul <sean@poorly.run>]

On Fri, Mar 01, 2019 at 01:56:20PM +0100, Maarten Lankhorst wrote:
> Convert msm to using __drm_atomic_helper_crtc_reset(), instead of
> writing its own version. Instead of open coding
> destroy_state(), call it directly for freeing the old state.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> Cc: Rob Clark <robdclark@gmail.com>
> Cc: Sean Paul <sean@poorly.run>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c  |  6 ++---
>  drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c | 28 +++++++++--------------
>  2 files changed, 13 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> index b776fca571f3..eb156cb73dd4 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> @@ -753,14 +753,12 @@ void dpu_crtc_commit_kickoff(struct drm_crtc *crtc, bool async)
>  
>  static void dpu_crtc_reset(struct drm_crtc *crtc)
>  {
> -	struct dpu_crtc_state *cstate;
> +	struct dpu_crtc_state *cstate = kzalloc(sizeof(*cstate), GFP_KERNEL);
>  
>  	if (crtc->state)
>  		dpu_crtc_destroy_state(crtc, crtc->state);
>  
> -	crtc->state = kzalloc(sizeof(*cstate), GFP_KERNEL);
> -	if (crtc->state)
> -		crtc->state->crtc = crtc;
> +	__drm_atomic_helper_crtc_reset(crtc, &cstate->base);
>  }
>  
>  /**
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> index b0cf63c4e3d7..bf24a08feab9 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> @@ -1002,23 +1002,6 @@ mdp5_crtc_atomic_print_state(struct drm_printer *p,
>  	drm_printf(p, "\tcmd_mode=%d\n", mdp5_cstate->cmd_mode);
>  }
>  
> -static void mdp5_crtc_reset(struct drm_crtc *crtc)
> -{
> -	struct mdp5_crtc_state *mdp5_cstate;
> -
> -	if (crtc->state) {
> -		__drm_atomic_helper_crtc_destroy_state(crtc->state);
> -		kfree(to_mdp5_crtc_state(crtc->state));
> -	}
> -
> -	mdp5_cstate = kzalloc(sizeof(*mdp5_cstate), GFP_KERNEL);
> -
> -	if (mdp5_cstate) {
> -		mdp5_cstate->base.crtc = crtc;
> -		crtc->state = &mdp5_cstate->base;
> -	}
> -}
> -
>  static struct drm_crtc_state *
>  mdp5_crtc_duplicate_state(struct drm_crtc *crtc)
>  {
> @@ -1046,6 +1029,17 @@ static void mdp5_crtc_destroy_state(struct drm_crtc *crtc, struct drm_crtc_state
>  	kfree(mdp5_cstate);
>  }
>  
> +static void mdp5_crtc_reset(struct drm_crtc *crtc)
> +{
> +	struct mdp5_crtc_state *mdp5_cstate =
> +		mdp5_cstate = kzalloc(sizeof(*mdp5_cstate), GFP_KERNEL);

Assigned twice for good measure ;)

> +
> +	if (crtc->state)
> +		mdp5_crtc_destroy_state(crtc, crtc->state);
> +
> +	__drm_atomic_helper_crtc_reset(crtc, &mdp5_cstate->base);
> +}
> +
>  static const struct drm_crtc_funcs mdp5_crtc_funcs = {
>  	.set_config = drm_atomic_helper_set_config,
>  	.destroy = mdp5_crtc_destroy,
> -- 
> 2.20.1
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS
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