bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0242-drm-vc4-Bring-fkms-into-line-with-kms-in-blocking-do.patch b/target/linux/bcm27xx/patches-5.4/950-0242-drm-vc4-Bring-fkms-into-line-with-kms-in-blocking-do.patch
new file mode 100644
index 0000000000..10a655ade1
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0242-drm-vc4-Bring-fkms-into-line-with-kms-in-blocking-do.patch
@@ -0,0 +1,47 @@
+From 9185a16ce8804d35339402c6aec38a528cc2c7a1 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Wed, 10 Apr 2019 17:43:57 +0100
+Subject: [PATCH] drm: vc4: Bring fkms into line with kms in blocking
+ doublescan modes
+
+Implement vc4_crtc_mode_valid so that it blocks doublescan modes
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 15 +++++++++++++--
+ 1 file changed, 13 insertions(+), 2 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -627,7 +627,17 @@ static void vc4_crtc_enable(struct drm_c
+ 			vc4_plane_set_blank(plane, plane->state->visible);
+ }
+ 
++static enum drm_mode_status
++vc4_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
++{
++	/* Do not allow doublescan modes from user space */
++	if (mode->flags & DRM_MODE_FLAG_DBLSCAN) {
++		DRM_DEBUG_KMS("[CRTC:%d] Doublescan mode rejected.\n",
++			      crtc->base.id);
++		return MODE_NO_DBLESCAN;
++	}
+ 
++	return MODE_OK;
+ }
+ 
+ static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
+@@ -737,10 +747,11 @@ static const struct drm_crtc_funcs vc4_c
+ 
+ static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
+ 	.mode_set_nofb = vc4_crtc_mode_set_nofb,
+-	.atomic_disable = vc4_crtc_disable,
+-	.atomic_enable = vc4_crtc_enable,
++	.mode_valid = vc4_crtc_mode_valid,
+ 	.atomic_check = vc4_crtc_atomic_check,
+ 	.atomic_flush = vc4_crtc_atomic_flush,
++	.atomic_enable = vc4_crtc_enable,
++	.atomic_disable = vc4_crtc_disable,
+ };
+ 
+ static const struct of_device_id vc4_firmware_kms_dt_match[] = {