Hi Daniel, On 2020-05-28 07:46, Daniel Vetter wrote: > 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. Sorry for the delay. I guess that has the same effect as patch 14 in Laurent's patchset would have: https://lore.kernel.org/dri-devel/20200309195216.31042-15-laurent.pinchart@xxxxxxxxxxxxxxxx/ But should be rather trivial to rebase. So until Laurent's patchset is ready, we can go with this fix. Acked-by: Stefan Agner <stefan@xxxxxxxx> -- Stefan > > 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 >> _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
