From a73f3382dae242261338588d8411057938501701 Mon Sep 17 00:00:00 2001 From: Stephane Viau Date: Tue, 27 Jan 2015 11:35:56 -0500 Subject: [PATCH] drm/msm/mdp5: only flush on a CRTC ->atomic_flush() MDP5 hardware has some limitation and requires to avoid flushing registers more than once between two Vblanks. This change removes all FLUSH operations (except for HW cursor) beside the one coming from a CRTC's ->atomic_flush(). This avoid this type of behavior (eg: CRTC + 1 plane overlay): [drm:mdp5_crtc_vblank_irq] vblank [drm:mdp5_ctl_commit] flush (20048) CTL + LM0 + RGB0 [drm:mdp5_ctl_commit] flush (20040) CTL + LM0 [drm:mdp5_crtc_vblank_irq] blank [drm:mdp5_ctl_commit] flush (20049) CTL + LM0 + RGB0 + VIG0 [drm:mdp5_crtc_vblank_irq] blank and replaces it by: [drm:mdp5_crtc_vblank_irq] vblank [drm:mdp5_ctl_commit] flush (20048) CTL + LM0 + RGB0 [drm:mdp5_crtc_vblank_irq] blank [drm:mdp5_ctl_commit] flush (20049) CTL + LM0 + RGB0 + VIG0 [drm:mdp5_crtc_vblank_irq] blank Only *one* FLUSH is called between Vblanks interrupts. Signed-off-by: Stephane Viau Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c index 2f2863cf8b45..bfba236daaa6 100644 --- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c @@ -298,8 +298,6 @@ static void mdp5_crtc_enable(struct drm_crtc *crtc) mdp5_enable(mdp5_kms); mdp_irq_register(&mdp5_kms->base, &mdp5_crtc->err); - crtc_flush_all(crtc); - mdp5_crtc->enabled = true; } @@ -618,7 +616,6 @@ void mdp5_crtc_set_intf(struct drm_crtc *crtc, int intf, { struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc); struct mdp5_kms *mdp5_kms = get_kms(crtc); - uint32_t flush_mask = 0; uint32_t intf_sel; unsigned long flags; @@ -657,10 +654,6 @@ void mdp5_crtc_set_intf(struct drm_crtc *crtc, int intf, DBG("%s: intf_sel=%08x", mdp5_crtc->name, intf_sel); mdp5_ctl_set_intf(mdp5_crtc->ctl, intf); - flush_mask |= mdp5_ctl_get_flush(mdp5_crtc->ctl); - flush_mask |= mdp5_lm_get_flush(mdp5_crtc->lm); - - crtc_flush(crtc, flush_mask); } int mdp5_crtc_get_lm(struct drm_crtc *crtc) -- 2.20.1