Re: [PATCH v2 4/7] drm/msm/dpu: dont use encoder->crtc in atomic path

[Sean Paul <sean-p7yTbzM4H96eqtR555YLDQ@public.gmane.org>]

On Wed, Mar 06, 2019 at 06:03:05PM -0800, Jeykumar Sankaran wrote:
> On 2019-03-04 10:09, Sean Paul wrote:
> > On Wed, Feb 13, 2019 at 05:19:13PM -0800, Jeykumar Sankaran wrote:
> > > encoder->crtc is not really meaningful for atomic path. Use
> > > crtc->encoder_mask to identify the crtc attached with
> > > an encoder.
> > > 
> > > Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
> > > ---
> > >  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 7 ++++++-
> > >  1 file changed, 6 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> > b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> > > index 45617b9..0a19124 100644
> > > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> > > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> > > @@ -961,6 +961,7 @@ static void dpu_encoder_virt_mode_set(struct
> > drm_encoder *drm_enc,
> > >  	struct dpu_kms *dpu_kms;
> > >  	struct list_head *connector_list;
> > >  	struct drm_connector *conn = NULL, *conn_iter;
> > > +	struct drm_crtc *drm_crtc;
> > >  	struct dpu_rm_hw_iter pp_iter, ctl_iter;
> > >  	struct msm_display_topology topology;
> > >  	struct dpu_hw_ctl *hw_ctl[MAX_CHANNELS_PER_ENC] = { NULL };
> > > @@ -992,10 +993,14 @@ static void dpu_encoder_virt_mode_set(struct
> > drm_encoder *drm_enc,
> > >  		return;
> > >  	}
> > > 
> > > +	drm_for_each_crtc(drm_crtc, drm_enc->dev)
> > > +		if (drm_crtc->state->encoder_mask &
> > drm_encoder_mask(drm_enc))
> > > +			break;
> > 
> > You should check whether you actually found the crtc, or are just using
> > the last
> > one in the list.
> > 
> I see you have pulled in the this entire series on msm-next. If it is the
> right
> thing to do, I can address this comment in a separate patch on top instead
> of
> posting v2.

Yes, please do.

Thanks,

Sean

> 
> Thanks
> Jeykumar S.
> > Sean
> > 
> > > +
> > >  	topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode);
> > > 
> > >  	/* Reserve dynamic resources now. Indicating non-AtomicTest phase
> > */
> > > -	ret = dpu_rm_reserve(&dpu_kms->rm, drm_enc, drm_enc->crtc->state,
> > > +	ret = dpu_rm_reserve(&dpu_kms->rm, drm_enc, drm_crtc->state,
> > >  			     topology, false);
> > >  	if (ret) {
> > >  		DPU_ERROR_ENC(dpu_enc,
> > > --
> > > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
> > Forum,
> > > a Linux Foundation Collaborative Project
> > > 
> 
> -- 
> Jeykumar S

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