These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / gpu / drm / vc4 / vc4_kms.c

diff --git a/kernel/drivers/gpu/drm/vc4/vc4_kms.c b/kernel/drivers/gpu/drm/vc4/vc4_kms.c
new file mode 100644 (file)
index 0000000..2e5597d
--- /dev/null
+++ b/kernel/drivers/gpu/drm/vc4/vc4_kms.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2015 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/**
+ * DOC: VC4 KMS
+ *
+ * This is the general code for implementing KMS mode setting that
+ * doesn't clearly associate with any of the other objects (plane,
+ * crtc, HDMI encoder).
+ */
+
+#include "drm_crtc.h"
+#include "drm_atomic_helper.h"
+#include "drm_crtc_helper.h"
+#include "drm_plane_helper.h"
+#include "drm_fb_cma_helper.h"
+#include "vc4_drv.h"
+
+static void vc4_output_poll_changed(struct drm_device *dev)
+{
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+
+       if (vc4->fbdev)
+               drm_fbdev_cma_hotplug_event(vc4->fbdev);
+}
+
+static const struct drm_mode_config_funcs vc4_mode_funcs = {
+       .output_poll_changed = vc4_output_poll_changed,
+       .atomic_check = drm_atomic_helper_check,
+       .atomic_commit = drm_atomic_helper_commit,
+       .fb_create = drm_fb_cma_create,
+};
+
+int vc4_kms_load(struct drm_device *dev)
+{
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       int ret;
+
+       ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+       if (ret < 0) {
+               dev_err(dev->dev, "failed to initialize vblank\n");
+               return ret;
+       }
+
+       dev->mode_config.max_width = 2048;
+       dev->mode_config.max_height = 2048;
+       dev->mode_config.funcs = &vc4_mode_funcs;
+       dev->mode_config.preferred_depth = 24;
+       dev->vblank_disable_allowed = true;
+
+       drm_mode_config_reset(dev);
+
+       vc4->fbdev = drm_fbdev_cma_init(dev, 32,
+                                       dev->mode_config.num_crtc,
+                                       dev->mode_config.num_connector);
+       if (IS_ERR(vc4->fbdev))
+               vc4->fbdev = NULL;
+
+       drm_kms_helper_poll_init(dev);
+
+       return 0;
+}