On Wed, May 27, 2020 at 11:47:56AM +0200, Daniel Vetter wrote: > mxsfb has vblank support, is atomic, but doesn't call > drm_crtc_vblank_on/off as it should. Not good. > > With my next patch to add the drm_crtc_vblank_reset to helpers this > means not even the very first crtc enabling will vblanks work anymore, > since they'll just stay off forever. > > Since mxsfb doesn't have any vblank waits of its own in the > enable/disable flow, nor an enable/disable_vblank callback we can do > the on/off as the first respectively last operation, and it should all > work. > > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> > Cc: Marek Vasut <marex@xxxxxxx> > Cc: Stefan Agner <stefan@xxxxxxxx> > Cc: Shawn Guo <shawnguo@xxxxxxxxxx> > Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> > Cc: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx> > Cc: Fabio Estevam <festevam@xxxxxxxxx> > Cc: NXP Linux Team <linux-imx@xxxxxxx> > Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Ping for some ack/review on this one here, it's holding up the subsystem wide fix in patch 2. Thanks, Daniel > --- > drivers/gpu/drm/mxsfb/mxsfb_drv.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c > index 497cf443a9af..1891cd6deb2f 100644 > --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c > +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c > @@ -124,6 +124,7 @@ static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe, > drm_panel_prepare(mxsfb->panel); > mxsfb_crtc_enable(mxsfb); > drm_panel_enable(mxsfb->panel); > + drm_crtc_vblank_on(&pipe->crtc); > } > > static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe) > @@ -133,6 +134,7 @@ static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe) > struct drm_crtc *crtc = &pipe->crtc; > struct drm_pending_vblank_event *event; > > + drm_crtc_vblank_off(&pipe->crtc); > drm_panel_disable(mxsfb->panel); > mxsfb_crtc_disable(mxsfb); > drm_panel_unprepare(mxsfb->panel); > -- > 2.26.2 > -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
