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Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0101-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.4/950-0101-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch79
1 files changed, 79 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0101-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch b/target/linux/bcm27xx/patches-5.4/950-0101-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch
new file mode 100644
index 0000000000..9800edf726
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0101-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch
@@ -0,0 +1,79 @@
+From e45ba936655805527357beb72e0a09da6854c0d7 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Tue, 30 Jan 2018 14:21:02 -0800
+Subject: [PATCH] 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
+@@ -767,15 +767,8 @@ 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;
+@@ -783,15 +776,8 @@ 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 = {