drm/komeda: Add irq handling

[linux.git] / drivers / gpu / drm / arm / display / komeda / komeda_kms.c

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.c b/drivers/gpu/drm/arm/display/komeda/komeda_kms.c
index 47a58ab20434e63b575820bd864045326784f5dc..b214edbfbbc6774e5ed60f1baa2c49b01b4e5dd1 100644 (file)
--- 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"
@@ -33,10 +34,31 @@ static int komeda_gem_cma_dumb_create(struct drm_file *file,
        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,
@@ -144,12 +166,22 @@ 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);
 free_kms:
@@ -162,7 +194,9 @@ 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);
        drm_mode_config_cleanup(drm);