1 files changed, 46 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0526-drm-vc4-Need-to-call-drm_crtc_vblank_-on-off-from-vc.patch b/target/linux/bcm27xx/patches-4.19/950-0526-drm-vc4-Need-to-call-drm_crtc_vblank_-on-off-from-vc.patch
new file mode 100644
index 0000000000..c9ce67fba5
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0526-drm-vc4-Need-to-call-drm_crtc_vblank_-on-off-from-vc.patch
@@ -0,0 +1,46 @@
+From fe2432615ecc3500cc265d6b84334950b9cbd4bf Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Tue, 9 Apr 2019 18:14:44 +0100
+Subject: [PATCH] from
+ vc4_crtc_[en|dis]able
+
+vblank needs to be enabled and disabled by the driver to avoid the
+DRM framework complaining in the kernel log.
+
+vc4_fkms_disable_vblank needs to signal that we don't want vblank
+callbacks too.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -562,6 +562,8 @@ static void vc4_crtc_mode_set_nofb(struc
+ 
+ static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
+ {
++	drm_crtc_vblank_off(crtc);
++
+ 	/* Always turn the planes off on CRTC disable. In DRM, planes
+ 	 * are enabled/disabled through the update/disable hooks
+ 	 * above, and the CRTC enable/disable independently controls
+@@ -577,6 +579,7 @@ static void vc4_crtc_disable(struct drm_
+ 
+ static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
+ {
++	drm_crtc_vblank_on(crtc);
+ 	/* Unblank the planes (if they're supposed to be displayed). */
+ 
+ 	if (crtc->primary->state->fb)
+@@ -673,6 +676,9 @@ static int vc4_fkms_enable_vblank(struct
+ 
+ static void vc4_fkms_disable_vblank(struct drm_crtc *crtc)
+ {
++	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
++
++	vc4_crtc->vblank_enabled = false;
+ }
+ 
+ static const struct drm_crtc_funcs vc4_crtc_funcs = {