Re: [PATCH 1/3] drm/msm: dpu: Grab the modeset locks in frame_event

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

On Wed, Nov 21, 2018 at 10:29:57AM +0100, Daniel Vetter wrote:
> On Mon, Nov 12, 2018 at 04:47:03PM -0500, Sean Paul wrote:
> > From: Sean Paul <seanpaul@chromium.org>
> > 
> > This patch wraps dpu_core_perf_crtc_release_bw() with modeset locks
> > since it digs into the state objects.
> > 
> > Signed-off-by: Sean Paul <seanpaul@chromium.org>
> > ---
> >  drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> > index ed84cf44a222..6e636f373950 100644
> > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
> > @@ -338,7 +338,9 @@ static void dpu_crtc_frame_event_work(struct kthread_work *work)
> >  			/* release bandwidth and other resources */
> >  			trace_dpu_crtc_frame_event_done(DRMID(crtc),
> >  							fevent->event);
> > +			drm_modeset_lock_all(crtc->dev);
> 
> From the kerneldoc: "This function is deprecated" Please don't use it in
> new code :-)
> 
> For locking all the state you want lock_all_ctx.

If you're looking for me, I'll be in my (frequently used) cone of shame :(

Thanks for catching this, v2 incoming!

Sean


> -Daniel
> 
> >  			dpu_core_perf_crtc_release_bw(crtc);
> > +			drm_modeset_unlock_all(crtc->dev);
> >  		} else {
> >  			trace_dpu_crtc_frame_event_more_pending(DRMID(crtc),
> >  								fevent->event);
> > -- 
> > Sean Paul, Software Engineer, Google / Chromium OS
> > 
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch

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