<div id="spnEditorSign_app">-- 发自我的网易邮箱手机智能版</div> ----- Original Message ----- From: "Daniel Vetter" <daniel@ffwll.ch> To: chenxb_99091@126.com Cc: "David Airlie" <airlied@linux.ie>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Sent: Mon, 25 May 2020 16:34:28 +0200 Subject: Re: [PATCH] drm: fix setting of plane_mask in pan_display_atomic() function for linux-4.4 >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. >-Danie<div>This bug is still present in the long-supported versions of kernel 4.4.y, including the latest kernel 4.4.224,see https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/?h=v4.4.224 </div><div> </div><div> > >--- > > 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 </div>