1 files changed, 70 insertions, 7 deletions

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
index 47a58ab20434..86f6542afb40 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
@@ -13,6 +13,7 @@
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_irq.h>
 #include <drm/drm_vblank.h>
 
 #include "komeda_dev.h"
@@ -25,18 +26,39 @@ static int komeda_gem_cma_dumb_create(struct drm_file *file,
 				      struct drm_device *dev,
 				      struct drm_mode_create_dumb *args)
 {
-	u32 alignment = 16; /* TODO get alignment from dev */
+	struct komeda_dev *mdev = dev->dev_private;
+	u32 pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
 
-	args->pitch = ALIGN(DIV_ROUND_UP(args->width * args->bpp, 8),
-			    alignment);
+	args->pitch = ALIGN(pitch, mdev->chip.bus_width);
 
 	return drm_gem_cma_dumb_create_internal(file, dev, args);
 }
 
+static irqreturn_t komeda_kms_irq_handler(int irq, void *data)
+{
+	struct drm_device *drm = data;
+	struct komeda_dev *mdev = drm->dev_private;
+	struct komeda_kms_dev *kms = to_kdev(drm);
+	struct komeda_events evts;
+	irqreturn_t status;
+	u32 i;
+
+	/* Call into the CHIP to recognize events */
+	memset(&evts, 0, sizeof(evts));
+	status = mdev->funcs->irq_handler(mdev, &evts);
+
+	/* Notify the crtc to handle the events */
+	for (i = 0; i < kms->n_crtcs; i++)
+		komeda_crtc_handle_event(&kms->crtcs[i], &evts);
+
+	return status;
+}
+
 static struct drm_driver komeda_kms_driver = {
 	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC |
-			   DRIVER_PRIME,
+			   DRIVER_PRIME | DRIVER_HAVE_IRQ,
 	.lastclose			= drm_fb_helper_lastclose,
+	.irq_handler			= komeda_kms_irq_handler,
 	.gem_free_object_unlocked	= drm_gem_cma_free_object,
 	.gem_vm_ops			= &drm_gem_cma_vm_ops,
 	.dumb_create			= komeda_gem_cma_dumb_create,
@@ -78,9 +100,37 @@ static const struct drm_mode_config_helper_funcs komeda_mode_config_helpers = {
 	.atomic_commit_tail = komeda_kms_commit_tail,
 };
 
+static int komeda_kms_check(struct drm_device *dev,
+			    struct drm_atomic_state *state)
+{
+	struct drm_crtc *crtc;
+	struct drm_crtc_state *old_crtc_st, *new_crtc_st;
+	int i, err;
+
+	err = drm_atomic_helper_check_modeset(dev, state);
+	if (err)
+		return err;
+
+	/* komeda need to re-calculate resource assumption in every commit
+	 * so need to add all affected_planes (even unchanged) to
+	 * drm_atomic_state.
+	 */
+	for_each_oldnew_crtc_in_state(state, crtc, old_crtc_st, new_crtc_st, i) {
+		err = drm_atomic_add_affected_planes(state, crtc);
+		if (err)
+			return err;
+	}
+
+	err = drm_atomic_helper_check_planes(dev, state);
+	if (err)
+		return err;
+
+	return 0;
+}
+
 static const struct drm_mode_config_funcs komeda_mode_config_funcs = {
 	.fb_create		= komeda_fb_create,
-	.atomic_check		= drm_atomic_helper_check,
+	.atomic_check		= komeda_kms_check,
 	.atomic_commit		= drm_atomic_helper_commit,
 };
 
@@ -144,14 +194,25 @@ struct komeda_kms_dev *komeda_kms_attach(struct komeda_dev *mdev)
 
 	drm_mode_config_reset(drm);
 
-	err = drm_dev_register(drm, 0);
+	err = drm_irq_install(drm, mdev->irq);
 	if (err)
 		goto cleanup_mode_config;
 
+	err = mdev->funcs->enable_irq(mdev);
+	if (err)
+		goto uninstall_irq;
+
+	err = drm_dev_register(drm, 0);
+	if (err)
+		goto uninstall_irq;
+
 	return kms;
 
+uninstall_irq:
+	drm_irq_uninstall(drm);
 cleanup_mode_config:
 	drm_mode_config_cleanup(drm);
+	komeda_kms_cleanup_private_objs(kms);
 free_kms:
 	kfree(kms);
 	return ERR_PTR(err);
@@ -162,9 +223,11 @@ void komeda_kms_detach(struct komeda_kms_dev *kms)
 	struct drm_device *drm = &kms->base;
 	struct komeda_dev *mdev = drm->dev_private;
 
+	mdev->funcs->disable_irq(mdev);
 	drm_dev_unregister(drm);
+	drm_irq_uninstall(drm);
 	component_unbind_all(mdev->dev, drm);
-	komeda_kms_cleanup_private_objs(mdev);
+	komeda_kms_cleanup_private_objs(kms);
 	drm_mode_config_cleanup(drm);
 	drm->dev_private = NULL;
 	drm_dev_put(drm);