drm/meson: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210706074545.8763-1-tzimmermann@suse.de

drivers/gpu/drm/meson/meson_drv.c

@@ -21,7 +21,6 @@
 #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_modeset_helper_vtables.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_vblank.h>
@@ -94,9 +93,6 @@ DEFINE_DRM_GEM_CMA_FOPS(fops);
 static const struct drm_driver meson_driver = {
 	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
 
-	/* IRQ */
-	.irq_handler		= meson_irq,
-
 	/* CMA Ops */
 	DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(meson_dumb_create),
 
@@ -335,7 +331,7 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
 	if (ret)
 		goto free_drm;
 
-	ret = drm_irq_install(drm, priv->vsync_irq);
+	ret = request_irq(priv->vsync_irq, meson_irq, 0, drm->driver->name, drm);
 	if (ret)
 		goto free_drm;
 
@@ -354,7 +350,7 @@ static int meson_drv_bind_master(struct device *dev, bool has_components)
 	return 0;
 
 uninstall_irq:
-	drm_irq_uninstall(drm);
+	free_irq(priv->vsync_irq, drm);
 free_drm:
 	drm_dev_put(drm);
 
@@ -382,7 +378,7 @@ static void meson_drv_unbind(struct device *dev)
 	drm_kms_helper_poll_fini(drm);
 	drm_atomic_helper_shutdown(drm);
 	component_unbind_all(dev, drm);
-	drm_irq_uninstall(drm);
+	free_irq(priv->vsync_irq, drm);
 	drm_dev_put(drm);
 
 	if (priv->afbcd.ops) {