DRM: Armada: Add Armada DRM driver

This patch adds support for the pair of LCD controllers on the Marvell
Armada 510 SoCs.  This driver supports:
- multiple contiguous scanout buffers for video and graphics
- shm backed cacheable buffer objects for X pixmaps for Vivante GPU
  acceleration
- dual lcd0 and lcd1 crt operation
- video overlay on each LCD crt via DRM planes
- page flipping of the main scanout buffers
- DRM prime for buffer export/import

This driver is trivial to extend to other Armada SoCs.

Included in this commit is the core driver with no output support; output
support is platform and encoder driver dependent.

Tested-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/gpu/drm/armada/armada_output.h b/drivers/gpu/drm/armada/armada_output.h
new file mode 100644
index 000000000000..4126d43b5057
--- /dev/null
+++ b/drivers/gpu/drm/armada/armada_output.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2012 Russell King
+ *
+ * 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.
+ */
+#ifndef ARMADA_CONNETOR_H
+#define ARMADA_CONNETOR_H
+
+#define encoder_helper_funcs(encoder) \
+	((struct drm_encoder_helper_funcs *)encoder->helper_private)
+
+struct armada_output_type {
+	int connector_type;
+	enum drm_connector_status (*detect)(struct drm_connector *, bool);
+	int (*create)(struct drm_connector *, const void *);
+	int (*set_property)(struct drm_connector *, struct drm_property *,
+			    uint64_t);
+};
+
+struct drm_encoder *armada_drm_connector_encoder(struct drm_connector *conn);
+
+void armada_drm_encoder_prepare(struct drm_encoder *encoder);
+void armada_drm_encoder_commit(struct drm_encoder *encoder);
+
+bool armada_drm_encoder_mode_fixup(struct drm_encoder *encoder,
+	const struct drm_display_mode *mode, struct drm_display_mode *adj);
+
+int armada_drm_slave_encoder_mode_valid(struct drm_connector *conn,
+	struct drm_display_mode *mode);
+
+int armada_drm_slave_encoder_set_property(struct drm_connector *conn,
+	struct drm_property *property, uint64_t value);
+
+int armada_output_create(struct drm_device *dev,
+	const struct armada_output_type *type, const void *data);
+
+#endif