From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: chenxb_99091@126.com, David Airlie <airlied@linux.ie>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm: fix setting of plane_mask in pan_display_atomic() function for linux-4.4
Date: Mon, 25 May 2020 17:56:14 +0300 [thread overview]
Message-ID: <20200525145614.GB6112@intel.com> (raw)
In-Reply-To: <20200525143428.GG206103@phenom.ffwll.local>
On Mon, May 25, 2020 at 04:34:28PM +0200, Daniel Vetter wrote:
> On Sat, May 23, 2020 at 11:49:07AM +0800, chenxb_99091@126.com wrote:
> > From: Xuebing Chen <chenxb_99091@126.com>
> >
> > The <include/drm/drm_crtc.h> provides drm_for_each_plane_mask macro and
> > plane_mask is defined as bitmask of plane indices, such as
> > 1<<drm_plane_index(plane). This patch fixes error setting of plane_mask
> > in pan_display_atomic() function.
> >
> > Signed-off-by: Xuebing Chen <chenxb_99091@126.com>
>
> What kernel is this patch against? Latest upstream doesn't have any such
> code anymore ... I'm assuming that Ville fixed this in one of his patches,
> but I can't find the right one just now.
Looks to be gone in
commit e00fb8564ee9 ("drm: Stop updating plane->crtc/fb/old_fb on
atomic drivers"), in 2018.
Also seems this 1<< bug was already fixed in
commit 7118fd9bd975 ("drm/fb-helper: Use proper plane mask for fb
cleanup") ... in 2015!
Might be a good idea to invest in an upgrade if you're still using
such old kernel releases.
> -Daniel
>
> > ---
> > drivers/gpu/drm/drm_fb_helper.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> > index e449f22..6a9f7ee 100644
> > --- a/drivers/gpu/drm/drm_fb_helper.c
> > +++ b/drivers/gpu/drm/drm_fb_helper.c
> > @@ -1256,7 +1256,7 @@ retry:
> > goto fail;
> >
> > plane = mode_set->crtc->primary;
> > - plane_mask |= drm_plane_index(plane);
> > + plane_mask |= 1 << drm_plane_index(plane);
> > plane->old_fb = plane->fb;
> > }
> >
> > --
> > 2.7.4
> >
> > _______________________________________________
> > 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
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Ville Syrjälä
Intel
next prev parent reply other threads:[~2020-05-25 14:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-23 3:49 [PATCH] drm: fix setting of plane_mask in pan_display_atomic() function for linux-4.4 chenxb_99091
2020-05-25 14:34 ` Daniel Vetter
2020-05-25 14:56 ` Ville Syrjälä [this message]
-- strict thread matches above, loose matches on Subject: below --
2020-05-23 3:47 chenxb_99091
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