brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

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

1 files changed, 79 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0117-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch b/target/linux/brcm2708/patches-4.19/950-0117-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch
new file mode 100644
index 0000000000..a2bd180659
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0117-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch
@@ -0,0 +1,79 @@
+From 7815410d46ef8c5462eadbeff59d8c7e43639b03 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Tue, 30 Jan 2018 14:21:02 -0800
+Subject: [PATCH 117/703] drm/vc4: Add missing enable/disable vblank handlers
+ in fkms.
+
+Fixes hang at boot in 4.14.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/gpu/drm/vc4/vc4_crtc.c         | 14 --------------
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 15 +++++++++++++++
+ 2 files changed, 15 insertions(+), 14 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_crtc.c
++++ b/drivers/gpu/drm/vc4/vc4_crtc.c
+@@ -764,15 +764,8 @@ static void vc4_crtc_atomic_flush(struct
+ 
+ static int vc4_enable_vblank(struct drm_crtc *crtc)
+ {
+-	struct drm_device *dev = crtc->dev;
+-	struct vc4_dev *vc4 = to_vc4_dev(dev);
+ 	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ 
+-	if (vc4->firmware_kms) {
+-		/* XXX: Can we mask the SMI interrupt? */
+-		return 0;
+-	}
+-
+ 	CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
+ 
+ 	return 0;
+@@ -780,15 +773,8 @@ static int vc4_enable_vblank(struct drm_
+ 
+ static void vc4_disable_vblank(struct drm_crtc *crtc)
+ {
+-	struct drm_device *dev = crtc->dev;
+-	struct vc4_dev *vc4 = to_vc4_dev(dev);
+ 	struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+ 
+-	if (vc4->firmware_kms) {
+-		/* XXX: Can we mask the SMI interrupt? */
+-		return;
+-	}
+-
+ 	CRTC_WRITE(PV_INTEN, 0);
+ }
+ 
+--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
+@@ -433,6 +433,19 @@ static int vc4_page_flip(struct drm_crtc
+ 	return drm_atomic_helper_page_flip(crtc, fb, event, flags, ctx);
+ }
+ 
++static int vc4_fkms_enable_vblank(struct drm_crtc *crtc)
++{
++	/* XXX: Need a way to enable/disable the interrupt, to avoid
++	 * DRM warnings at boot time.
++	 */
++
++	return 0;
++}
++
++static void vc4_fkms_disable_vblank(struct drm_crtc *crtc)
++{
++}
++
+ static const struct drm_crtc_funcs vc4_crtc_funcs = {
+ 	.set_config = drm_atomic_helper_set_config,
+ 	.destroy = drm_crtc_cleanup,
+@@ -443,6 +456,8 @@ static const struct drm_crtc_funcs vc4_c
+ 	.reset = drm_atomic_helper_crtc_reset,
+ 	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+ 	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
++	.enable_vblank = vc4_fkms_enable_vblank,
++	.disable_vblank = vc4_fkms_disable_vblank,
+ };
+ 
+ static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {