[PATCH] drm/komeda: Enable/Disable vblank interrupts

[Ayan Halder <Ayan.Halder@arm.com>]

One needs to set "(struct drm_device *)->irq_enabled = true" to signal drm core
to enable vblank interrupts after the hardware has been initialized.
Correspondingly, one needs to disable vblank interrupts by setting
"(struct drm_device *)->irq_enabled = false" at the beginning of the
de-initializing routine.

Signed-off-by: Ayan Kumar halder <ayan.halder@arm.com>
---
 drivers/gpu/drm/arm/display/komeda/komeda_kms.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
index 7b5cde14e3ba..b4fd8ee0d05f 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
@@ -204,6 +204,8 @@ struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
 	if (err)
 		goto uninstall_irq;
 
+	drm->irq_enabled = true;
+
 	err = drm_dev_register(drm, 0);
 	if (err)
 		goto uninstall_irq;
@@ -211,6 +213,7 @@ struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
 	return kms;
 
 uninstall_irq:
+	drm->irq_enabled = false;
 	drm_irq_uninstall(drm);
 cleanup_mode_config:
 	drm_mode_config_cleanup(drm);
@@ -225,6 +228,7 @@ void komeda_kms_detach(struct komeda_kms_dev *kms)
 	struct drm_device *drm = &kms->base;
 	struct komeda_dev *mdev = drm->dev_private;
 
+	drm->irq_enabled = false;
 	mdev->funcs->disable_irq(mdev);
 	drm_dev_unregister(drm);
 	drm_irq_uninstall(drm);
-- 
2.21.0