From: Maxime Ripard Date: Thu, 3 Sep 2020 08:00:59 +0000 (+0200) Subject: drm/vc4: crtc: Move HVS channel init before the PV initialisation X-Git-Tag: v5.10.7~1332^2~3^2~198 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4b72b10a64ba70ce0b7d840ffc34d5841a660a5b;p=platform%2Fkernel%2Flinux-rpi.git drm/vc4: crtc: Move HVS channel init before the PV initialisation In order to avoid stale pixels getting stuck in an intermediate FIFO between the HVS and the pixelvalve on BCM2711, we need to configure the HVS channel before the pixelvalve is reset and configured. Signed-off-by: Maxime Ripard Tested-by: Chanwoo Choi Tested-by: Hoegeun Kwon Tested-by: Stefan Wahren Reviewed-by: Dave Stevenson Link: https://patchwork.freedesktop.org/patch/msgid/9d7c5a03bc1a1e6d50f7b617cc2d8a46a4bbb7bc.1599120059.git-series.maxime@cerno.tech --- diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c index 2c5ff45..b7b0e19 100644 --- a/drivers/gpu/drm/vc4/vc4_crtc.c +++ b/drivers/gpu/drm/vc4/vc4_crtc.c @@ -427,10 +427,6 @@ static void vc4_crtc_atomic_enable(struct drm_crtc *crtc, require_hvs_enabled(dev); - vc4_crtc_config_pv(crtc); - - CRTC_WRITE(PV_CONTROL, CRTC_READ(PV_CONTROL) | PV_CONTROL_EN); - /* Enable vblank irq handling before crtc is started otherwise * drm_crtc_get_vblank() fails in vc4_crtc_update_dlist(). */ @@ -438,6 +434,10 @@ static void vc4_crtc_atomic_enable(struct drm_crtc *crtc, vc4_hvs_atomic_enable(crtc, old_state); + vc4_crtc_config_pv(crtc); + + CRTC_WRITE(PV_CONTROL, CRTC_READ(PV_CONTROL) | PV_CONTROL_EN); + /* When feeding the transposer block the pixelvalve is unneeded and * should not be enabled. */