Re: [PATCH 1/2] drm/msm/dpu: add dpu encoder uninit

From: Sean Paul <sean-p7yTbzM4H96eqtR555YLDQ@public.gmane.org>
To: Jeykumar Sankaran <jsanka-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
Cc: linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org,
	robdclark-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	seanpaul-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org,
	hoegsberg-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
	freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: Re: [PATCH 1/2] drm/msm/dpu: add dpu encoder uninit
Date: Fri, 16 Nov 2018 16:37:26 -0500	[thread overview]
Message-ID: <20181116213726.GA154160@art_vandelay> (raw)
In-Reply-To: <20181116213526.GZ154160@art_vandelay>

On Fri, Nov 16, 2018 at 04:35:26PM -0500, Sean Paul wrote:
> On Fri, Nov 16, 2018 at 11:22:21AM -0800, Jeykumar Sankaran wrote:
> > Add encoder interface to release dpu encoder
> > on mode_init failures in kms.
> > 
> > Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
> > ---
> >  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 12 ++++++++++--
> >  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h |  6 ++++++
> >  2 files changed, 16 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> > index dd7ab85..b253165 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> > @@ -422,6 +422,15 @@ void dpu_encoder_get_hw_resources(struct drm_encoder *drm_enc,
> >  	}
> >  }
> >  
> > +void dpu_encoder_uninit(struct drm_encoder *drm_enc)
> > +{
> > +	struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
> > +
> > +	drm_encoder_cleanup(drm_enc);
> > +
> > +	kfree(dpu_enc);
> > +}
> > +
> >  static void dpu_encoder_destroy(struct drm_encoder *drm_enc)
> >  {
> >  	struct dpu_encoder_virt *dpu_enc = NULL;
> > @@ -453,10 +462,9 @@ static void dpu_encoder_destroy(struct drm_encoder *drm_enc)
> >  	dpu_enc->num_phys_encs = 0;
> >  	mutex_unlock(&dpu_enc->enc_lock);
> >  
> > -	drm_encoder_cleanup(drm_enc);
> >  	mutex_destroy(&dpu_enc->enc_lock);
> >  
> > -	kfree(dpu_enc);
> > +	dpu_encoder_uninit(drm_enc);
> >  }
> >  
> >  void dpu_encoder_helper_split_config(
> > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> > index 9dbf38f..60b88bd 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
> > @@ -142,6 +142,12 @@ struct drm_encoder *dpu_encoder_init(
> >  		int drm_enc_mode);
> >  
> >  /**
> > + * dpu_encoder_uninit - uninitialize virtual encoder object
> > + * @drm_enc:  Pointer to drm encoder
> > + */
> > +void dpu_encoder_uninit(struct drm_encoder *drm_enc);
> 
> Just make it static?

I just saw YueHaibing's patch to remove the kfree entirely since dpu_enc is
devm_* managed. IMO, that'd be a better solution than this.

Sean

> 
> > +
> > +/**
> >   * dpu_encoder_setup - setup dpu_encoder for the display probed
> >   * @dev:		Pointer to drm device structure
> >   * @enc:		Pointer to the drm_encoder
> > -- 
> > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> > a Linux Foundation Collaborative Project
> > 
> 
> -- 
> Sean Paul, Software Engineer, Google / Chromium OS

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