1 files changed, 351 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
new file mode 100644
index 000000000..937394cbc
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -0,0 +1,351 @@
+/*
+ * Copyright (C) 2015 Free Electrons
+ * Copyright (C) 2015 NextThing Co
+ *
+ * Maxime Ripard <maxime.ripard@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/component.h>
+#include <linux/of_graph.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "sun4i_crtc.h"
+#include "sun4i_drv.h"
+#include "sun4i_framebuffer.h"
+#include "sun4i_layer.h"
+#include "sun4i_tcon.h"
+
+static int sun4i_drv_enable_vblank(struct drm_device *drm, unsigned int pipe)
+{
+	struct sun4i_drv *drv = drm->dev_private;
+	struct sun4i_tcon *tcon = drv->tcon;
+
+	DRM_DEBUG_DRIVER("Enabling VBLANK on pipe %d\n", pipe);
+
+	sun4i_tcon_enable_vblank(tcon, true);
+
+	return 0;
+}
+
+static void sun4i_drv_disable_vblank(struct drm_device *drm, unsigned int pipe)
+{
+	struct sun4i_drv *drv = drm->dev_private;
+	struct sun4i_tcon *tcon = drv->tcon;
+
+	DRM_DEBUG_DRIVER("Disabling VBLANK on pipe %d\n", pipe);
+
+	sun4i_tcon_enable_vblank(tcon, false);
+}
+
+static const struct file_operations sun4i_drv_fops = {
+	.owner		= THIS_MODULE,
+	.open		= drm_open,
+	.release	= drm_release,
+	.unlocked_ioctl	= drm_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= drm_compat_ioctl,
+#endif
+	.poll		= drm_poll,
+	.read		= drm_read,
+	.llseek		= no_llseek,
+	.mmap		= drm_gem_cma_mmap,
+};
+
+static struct drm_driver sun4i_drv_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
+
+	/* Generic Operations */
+	.fops			= &sun4i_drv_fops,
+	.name			= "sun4i-drm",
+	.desc			= "Allwinner sun4i Display Engine",
+	.date			= "20150629",
+	.major			= 1,
+	.minor			= 0,
+
+	/* GEM Operations */
+	.dumb_create		= drm_gem_cma_dumb_create,
+	.dumb_destroy		= drm_gem_dumb_destroy,
+	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
+	.gem_free_object	= drm_gem_cma_free_object,
+	.gem_vm_ops		= &drm_gem_cma_vm_ops,
+
+	/* PRIME Operations */
+	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
+	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
+	.gem_prime_import	= drm_gem_prime_import,
+	.gem_prime_export	= drm_gem_prime_export,
+	.gem_prime_get_sg_table	= drm_gem_cma_prime_get_sg_table,
+	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
+	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
+	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
+
+	/* Frame Buffer Operations */
+
+	/* VBlank Operations */
+	.get_vblank_counter	= drm_vblank_no_hw_counter,
+	.enable_vblank		= sun4i_drv_enable_vblank,
+	.disable_vblank		= sun4i_drv_disable_vblank,
+};
+
+static void sun4i_remove_framebuffers(void)
+{
+	struct apertures_struct *ap;
+
+	ap = alloc_apertures(1);
+	if (!ap)
+		return;
+
+	/* The framebuffer can be located anywhere in RAM */
+	ap->ranges[0].base = 0;
+	ap->ranges[0].size = ~0;
+
+	remove_conflicting_framebuffers(ap, "sun4i-drm-fb", false);
+	kfree(ap);
+}
+
+static int sun4i_drv_bind(struct device *dev)
+{
+	struct drm_device *drm;
+	struct sun4i_drv *drv;
+	int ret;
+
+	drm = drm_dev_alloc(&sun4i_drv_driver, dev);
+	if (!drm)
+		return -ENOMEM;
+
+	ret = drm_dev_set_unique(drm, dev_name(drm->dev));
+	if (ret)
+		goto free_drm;
+
+	drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
+	if (!drv) {
+		ret = -ENOMEM;
+		goto free_drm;
+	}
+	drm->dev_private = drv;
+
+	drm_vblank_init(drm, 1);
+	drm_mode_config_init(drm);
+
+	ret = component_bind_all(drm->dev, drm);
+	if (ret) {
+		dev_err(drm->dev, "Couldn't bind all pipelines components\n");
+		goto free_drm;
+	}
+
+	/* Create our layers */
+	drv->layers = sun4i_layers_init(drm);
+	if (!drv->layers) {
+		dev_err(drm->dev, "Couldn't create the planes\n");
+		ret = -EINVAL;
+		goto free_drm;
+	}
+
+	/* Create our CRTC */
+	drv->crtc = sun4i_crtc_init(drm);
+	if (!drv->crtc) {
+		dev_err(drm->dev, "Couldn't create the CRTC\n");
+		ret = -EINVAL;
+		goto free_drm;
+	}
+	drm->irq_enabled = true;
+
+	/* Remove early framebuffers (ie. simplefb) */
+	sun4i_remove_framebuffers();
+
+	/* Create our framebuffer */
+	drv->fbdev = sun4i_framebuffer_init(drm);
+	if (IS_ERR(drv->fbdev)) {
+		dev_err(drm->dev, "Couldn't create our framebuffer\n");
+		ret = PTR_ERR(drv->fbdev);
+		goto free_drm;
+	}
+
+	/* Enable connectors polling */
+	drm_kms_helper_poll_init(drm);
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		goto free_drm;
+
+	ret = drm_connector_register_all(drm);
+	if (ret)
+		goto unregister_drm;
+
+	return 0;
+
+unregister_drm:
+	drm_dev_unregister(drm);
+free_drm:
+	drm_dev_unref(drm);
+	return ret;
+}
+
+static void sun4i_drv_unbind(struct device *dev)
+{
+	struct drm_device *drm = dev_get_drvdata(dev);
+
+	drm_connector_unregister_all(drm);
+	drm_dev_unregister(drm);
+	drm_kms_helper_poll_fini(drm);
+	sun4i_framebuffer_free(drm);
+	drm_vblank_cleanup(drm);
+	drm_dev_unref(drm);
+}
+
+static const struct component_master_ops sun4i_drv_master_ops = {
+	.bind	= sun4i_drv_bind,
+	.unbind	= sun4i_drv_unbind,
+};
+
+static bool sun4i_drv_node_is_frontend(struct device_node *node)
+{
+	return of_device_is_compatible(node,
+				       "allwinner,sun5i-a13-display-frontend");
+}
+
+static bool sun4i_drv_node_is_tcon(struct device_node *node)
+{
+	return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon");
+}
+
+static int compare_of(struct device *dev, void *data)
+{
+	DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
+			 of_node_full_name(dev->of_node),
+			 of_node_full_name(data));
+
+	return dev->of_node == data;
+}
+
+static int sun4i_drv_add_endpoints(struct device *dev,
+				   struct component_match **match,
+				   struct device_node *node)
+{
+	struct device_node *port, *ep, *remote;
+	int count = 0;
+
+	/*
+	 * We don't support the frontend for now, so we will never
+	 * have a device bound. Just skip over it, but we still want
+	 * the rest our pipeline to be added.
+	 */
+	if (!sun4i_drv_node_is_frontend(node) &&
+	    !of_device_is_available(node))
+		return 0;
+
+	if (!sun4i_drv_node_is_frontend(node)) {
+		/* Add current component */
+		DRM_DEBUG_DRIVER("Adding component %s\n",
+				 of_node_full_name(node));
+		component_match_add(dev, match, compare_of, node);
+		count++;
+	}
+
+	/* Inputs are listed first, then outputs */
+	port = of_graph_get_port_by_id(node, 1);
+	if (!port) {
+		DRM_DEBUG_DRIVER("No output to bind\n");
+		return count;
+	}
+
+	for_each_available_child_of_node(port, ep) {
+		remote = of_graph_get_remote_port_parent(ep);
+		if (!remote) {
+			DRM_DEBUG_DRIVER("Error retrieving the output node\n");
+			of_node_put(remote);
+			continue;
+		}
+
+		/*
+		 * If the node is our TCON, the first port is used for our
+		 * panel, and will not be part of the
+		 * component framework.
+		 */
+		if (sun4i_drv_node_is_tcon(node)) {
+			struct of_endpoint endpoint;
+
+			if (of_graph_parse_endpoint(ep, &endpoint)) {
+				DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
+				continue;
+			}
+
+			if (!endpoint.id) {
+				DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
+				continue;
+			}
+		}
+
+		/* Walk down our tree */
+		count += sun4i_drv_add_endpoints(dev, match, remote);
+
+		of_node_put(remote);
+	}
+
+	return count;
+}
+
+static int sun4i_drv_probe(struct platform_device *pdev)
+{
+	struct component_match *match = NULL;
+	struct device_node *np = pdev->dev.of_node;
+	int i, count = 0;
+
+	for (i = 0;; i++) {
+		struct device_node *pipeline = of_parse_phandle(np,
+								"allwinner,pipelines",
+								i);
+		if (!pipeline)
+			break;
+
+		count += sun4i_drv_add_endpoints(&pdev->dev, &match,
+						pipeline);
+		of_node_put(pipeline);
+
+		DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n",
+				 count, i);
+	}
+
+	if (count)
+		return component_master_add_with_match(&pdev->dev,
+						       &sun4i_drv_master_ops,
+						       match);
+	else
+		return 0;
+}
+
+static int sun4i_drv_remove(struct platform_device *pdev)
+{
+	return 0;
+}
+
+static const struct of_device_id sun4i_drv_of_table[] = {
+	{ .compatible = "allwinner,sun5i-a13-display-engine" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
+
+static struct platform_driver sun4i_drv_platform_driver = {
+	.probe		= sun4i_drv_probe,
+	.remove		= sun4i_drv_remove,
+	.driver		= {
+		.name		= "sun4i-drm",
+		.of_match_table	= sun4i_drv_of_table,
+	},
+};
+module_platform_driver(sun4i_drv_platform_driver);
+
+MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
+MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
+MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
+MODULE_LICENSE("GPL");