1 files changed, 299 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
new file mode 100644
index 000000000..2390c1bb6
--- /dev/null
+++ b/drivers/gpu/drm/sti/sti_drv.c
@@ -0,0 +1,299 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) STMicroelectronics SA 2014
+ * Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
+ */
+
+#include <linux/component.h>
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_debugfs.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fbdev_dma.h>
+#include <drm/drm_gem_dma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+
+#include "sti_drv.h"
+#include "sti_plane.h"
+
+#define DRIVER_NAME	"sti"
+#define DRIVER_DESC	"STMicroelectronics SoC DRM"
+#define DRIVER_DATE	"20140601"
+#define DRIVER_MAJOR	1
+#define DRIVER_MINOR	0
+
+#define STI_MAX_FB_HEIGHT	4096
+#define STI_MAX_FB_WIDTH	4096
+
+static int sti_drm_fps_get(void *data, u64 *val)
+{
+	struct drm_device *drm_dev = data;
+	struct drm_plane *p;
+	unsigned int i = 0;
+
+	*val = 0;
+	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
+		struct sti_plane *plane = to_sti_plane(p);
+
+		*val |= plane->fps_info.output << i;
+		i++;
+	}
+
+	return 0;
+}
+
+static int sti_drm_fps_set(void *data, u64 val)
+{
+	struct drm_device *drm_dev = data;
+	struct drm_plane *p;
+	unsigned int i = 0;
+
+	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
+		struct sti_plane *plane = to_sti_plane(p);
+
+		memset(&plane->fps_info, 0, sizeof(plane->fps_info));
+		plane->fps_info.output = (val >> i) & 1;
+
+		i++;
+	}
+
+	return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(sti_drm_fps_fops,
+			sti_drm_fps_get, sti_drm_fps_set, "%llu\n");
+
+static int sti_drm_fps_dbg_show(struct seq_file *s, void *data)
+{
+	struct drm_info_node *node = s->private;
+	struct drm_device *dev = node->minor->dev;
+	struct drm_plane *p;
+
+	list_for_each_entry(p, &dev->mode_config.plane_list, head) {
+		struct sti_plane *plane = to_sti_plane(p);
+
+		seq_printf(s, "%s%s\n",
+			   plane->fps_info.fps_str,
+			   plane->fps_info.fips_str);
+	}
+
+	return 0;
+}
+
+static struct drm_info_list sti_drm_dbg_list[] = {
+	{"fps_get", sti_drm_fps_dbg_show, 0},
+};
+
+static void sti_drm_dbg_init(struct drm_minor *minor)
+{
+	drm_debugfs_create_files(sti_drm_dbg_list,
+				 ARRAY_SIZE(sti_drm_dbg_list),
+				 minor->debugfs_root, minor);
+
+	debugfs_create_file("fps_show", S_IRUGO | S_IWUSR, minor->debugfs_root,
+			    minor->dev, &sti_drm_fps_fops);
+
+	DRM_INFO("%s: debugfs installed\n", DRIVER_NAME);
+}
+
+static const struct drm_mode_config_funcs sti_mode_config_funcs = {
+	.fb_create = drm_gem_fb_create,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void sti_mode_config_init(struct drm_device *dev)
+{
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+
+	/*
+	 * set max width and height as default value.
+	 * this value would be used to check framebuffer size limitation
+	 * at drm_mode_addfb().
+	 */
+	dev->mode_config.max_width = STI_MAX_FB_WIDTH;
+	dev->mode_config.max_height = STI_MAX_FB_HEIGHT;
+
+	dev->mode_config.funcs = &sti_mode_config_funcs;
+
+	dev->mode_config.normalize_zpos = true;
+}
+
+DEFINE_DRM_GEM_DMA_FOPS(sti_driver_fops);
+
+static const struct drm_driver sti_driver = {
+	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
+	.fops = &sti_driver_fops,
+	DRM_GEM_DMA_DRIVER_OPS,
+
+	.debugfs_init = sti_drm_dbg_init,
+
+	.name = DRIVER_NAME,
+	.desc = DRIVER_DESC,
+	.date = DRIVER_DATE,
+	.major = DRIVER_MAJOR,
+	.minor = DRIVER_MINOR,
+};
+
+static int sti_init(struct drm_device *ddev)
+{
+	struct sti_private *private;
+
+	private = kzalloc(sizeof(*private), GFP_KERNEL);
+	if (!private)
+		return -ENOMEM;
+
+	ddev->dev_private = (void *)private;
+	dev_set_drvdata(ddev->dev, ddev);
+	private->drm_dev = ddev;
+
+	drm_mode_config_init(ddev);
+
+	sti_mode_config_init(ddev);
+
+	drm_kms_helper_poll_init(ddev);
+
+	return 0;
+}
+
+static void sti_cleanup(struct drm_device *ddev)
+{
+	struct sti_private *private = ddev->dev_private;
+
+	drm_kms_helper_poll_fini(ddev);
+	drm_atomic_helper_shutdown(ddev);
+	drm_mode_config_cleanup(ddev);
+	component_unbind_all(ddev->dev, ddev);
+	kfree(private);
+	ddev->dev_private = NULL;
+}
+
+static int sti_bind(struct device *dev)
+{
+	struct drm_device *ddev;
+	int ret;
+
+	ddev = drm_dev_alloc(&sti_driver, dev);
+	if (IS_ERR(ddev))
+		return PTR_ERR(ddev);
+
+	ret = sti_init(ddev);
+	if (ret)
+		goto err_drm_dev_put;
+
+	ret = component_bind_all(ddev->dev, ddev);
+	if (ret)
+		goto err_cleanup;
+
+	ret = drm_dev_register(ddev, 0);
+	if (ret)
+		goto err_cleanup;
+
+	drm_mode_config_reset(ddev);
+
+	drm_fbdev_dma_setup(ddev, 32);
+
+	return 0;
+
+err_cleanup:
+	sti_cleanup(ddev);
+err_drm_dev_put:
+	drm_dev_put(ddev);
+	return ret;
+}
+
+static void sti_unbind(struct device *dev)
+{
+	struct drm_device *ddev = dev_get_drvdata(dev);
+
+	drm_dev_unregister(ddev);
+	sti_cleanup(ddev);
+	drm_dev_put(ddev);
+}
+
+static const struct component_master_ops sti_ops = {
+	.bind = sti_bind,
+	.unbind = sti_unbind,
+};
+
+static int sti_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	struct device_node *child_np;
+	struct component_match *match = NULL;
+
+	dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+
+	devm_of_platform_populate(dev);
+
+	child_np = of_get_next_available_child(node, NULL);
+
+	while (child_np) {
+		drm_of_component_match_add(dev, &match, component_compare_of,
+					   child_np);
+		child_np = of_get_next_available_child(node, child_np);
+	}
+
+	return component_master_add_with_match(dev, &sti_ops, match);
+}
+
+static void sti_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &sti_ops);
+}
+
+static const struct of_device_id sti_dt_ids[] = {
+	{ .compatible = "st,sti-display-subsystem", },
+	{ /* end node */ },
+};
+MODULE_DEVICE_TABLE(of, sti_dt_ids);
+
+static struct platform_driver sti_platform_driver = {
+	.probe = sti_platform_probe,
+	.remove_new = sti_platform_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.of_match_table = sti_dt_ids,
+	},
+};
+
+static struct platform_driver * const drivers[] = {
+	&sti_tvout_driver,
+	&sti_hqvdp_driver,
+	&sti_hdmi_driver,
+	&sti_hda_driver,
+	&sti_dvo_driver,
+	&sti_vtg_driver,
+	&sti_compositor_driver,
+	&sti_platform_driver,
+};
+
+static int sti_drm_init(void)
+{
+	if (drm_firmware_drivers_only())
+		return -ENODEV;
+
+	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
+}
+module_init(sti_drm_init);
+
+static void sti_drm_exit(void)
+{
+	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
+}
+module_exit(sti_drm_exit);
+
+MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
+MODULE_LICENSE("GPL");