linux-kernel - [PATCH v3 0/4] handle vblank when disabling ctc with interrupt disabled (was [PATCH v2] drm/imx: correct order of crtc disable)

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Date:   Tue, 25 Jun 2019 18:59:11 +0100
From:   Robert Beckett <bob.beckett@...labora.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Robert Beckett <bob.beckett@...labora.com>
Subject: [PATCH v3 0/4] handle vblank when disabling ctc with interrupt disabled (was [PATCH v2] drm/imx: correct order of crtc disable)

Handle vblank event sent to signal crtc disable while the backend vblank
interrupt has already been disabled by vblank_disable_fn.

Fixes: a474478642d5 ("drm/imx: fix crtc vblank state regression")
Fixes: 68036b08b91bc ("drm/vblank: Do not update vblank count if interrupts are already disabled.")
Fixes: 5f2f911578fb ("drm/imx: atomic phase 3 step 1: Use atomic configuration")


Changes since v2:
Split up the patch in to smaller pieces.
Add warning when about to send bogus vblank event.
Update vblank to best guess info during drm_vblank_disable_and_save.

Robert Beckett (4):
  drm/vblank: warn on sending stale event
  drm/imx: notify drm core before sending event during crtc disable
  drm/vblank: estimate vblank while disabling vblank if interrupt
    disabled
  drm/imx: only send event on crtc disable if kept disabled

 drivers/gpu/drm/drm_vblank.c     | 33 +++++++++++++++++++++++++++++++-
 drivers/gpu/drm/imx/ipuv3-crtc.c |  6 +++---
 2 files changed, 35 insertions(+), 4 deletions(-)

-- 
2.18.0