From 2a57e9b5af2b96c45d8c73d34416e5dfa5dd38d9 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Tue, 28 Apr 2015 18:01:45 +0300 Subject: drm: rcar-du: Keep plane to CRTC associations when disabling a plane Changing the plane to CRTC associations requires restarting the CRTC group, creating visible flicker. Mitigate the issue by changing plane association only when a plane becomes enabled, not when it get disabled. Signed-off-by: Laurent Pinchart --- drivers/gpu/drm/rcar-du/rcar_du_group.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/gpu/drm/rcar-du/rcar_du_group.c') diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c index 1bdc0ee0c248..7fd39a7d91c8 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_group.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c @@ -85,6 +85,12 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp) * superposition 0 to DU0 pins. DU1 pins will be configured dynamically. */ rcar_du_group_write(rgrp, DORCR, DORCR_PG1D_DS1 | DORCR_DPRS); + + /* Apply planes to CRTCs association. */ + mutex_lock(&rgrp->lock); + rcar_du_group_write(rgrp, DPTSR, (rgrp->dptsr_planes << 16) | + rgrp->dptsr_planes); + mutex_unlock(&rgrp->lock); } /* -- cgit v1.2.3