Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 255 insertions, 0 deletions

diff --git a/drivers/gpu/drm/arc/arcpgu_drv.c b/drivers/gpu/drm/arc/arcpgu_drv.c
new file mode 100644
index 000000000..f067de4e1
--- /dev/null
+++ b/drivers/gpu/drm/arc/arcpgu_drv.c
@@ -0,0 +1,255 @@
+/*
+ * ARC PGU DRM driver.
+ *
+ * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/clk.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <linux/of_reserved_mem.h>
+
+#include "arcpgu.h"
+#include "arcpgu_regs.h"
+
+static void arcpgu_fb_output_poll_changed(struct drm_device *dev)
+{
+	struct arcpgu_drm_private *arcpgu = dev->dev_private;
+
+	drm_fbdev_cma_hotplug_event(arcpgu->fbdev);
+}
+
+static const struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
+	.fb_create  = drm_gem_fb_create,
+	.output_poll_changed = arcpgu_fb_output_poll_changed,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void arcpgu_setup_mode_config(struct drm_device *drm)
+{
+	drm_mode_config_init(drm);
+	drm->mode_config.min_width = 0;
+	drm->mode_config.min_height = 0;
+	drm->mode_config.max_width = 1920;
+	drm->mode_config.max_height = 1080;
+	drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
+}
+
+DEFINE_DRM_GEM_CMA_FOPS(arcpgu_drm_ops);
+
+static void arcpgu_lastclose(struct drm_device *drm)
+{
+	struct arcpgu_drm_private *arcpgu = drm->dev_private;
+
+	drm_fbdev_cma_restore_mode(arcpgu->fbdev);
+}
+
+static int arcpgu_load(struct drm_device *drm)
+{
+	struct platform_device *pdev = to_platform_device(drm->dev);
+	struct arcpgu_drm_private *arcpgu;
+	struct device_node *encoder_node;
+	struct resource *res;
+	int ret;
+
+	arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
+	if (arcpgu == NULL)
+		return -ENOMEM;
+
+	drm->dev_private = arcpgu;
+
+	arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
+	if (IS_ERR(arcpgu->clk))
+		return PTR_ERR(arcpgu->clk);
+
+	arcpgu_setup_mode_config(drm);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(arcpgu->regs))
+		return PTR_ERR(arcpgu->regs);
+
+	dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
+		 arc_pgu_read(arcpgu, ARCPGU_REG_ID));
+
+	/* Get the optional framebuffer memory resource */
+	ret = of_reserved_mem_device_init(drm->dev);
+	if (ret && ret != -ENODEV)
+		return ret;
+
+	if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
+		return -ENODEV;
+
+	if (arc_pgu_setup_crtc(drm) < 0)
+		return -ENODEV;
+
+	/* find the encoder node and initialize it */
+	encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
+	if (encoder_node) {
+		ret = arcpgu_drm_hdmi_init(drm, encoder_node);
+		of_node_put(encoder_node);
+		if (ret < 0)
+			return ret;
+	} else {
+		ret = arcpgu_drm_sim_init(drm, NULL);
+		if (ret < 0)
+			return ret;
+	}
+
+	drm_mode_config_reset(drm);
+	drm_kms_helper_poll_init(drm);
+
+	arcpgu->fbdev = drm_fbdev_cma_init(drm, 16,
+					   drm->mode_config.num_connector);
+	if (IS_ERR(arcpgu->fbdev)) {
+		ret = PTR_ERR(arcpgu->fbdev);
+		arcpgu->fbdev = NULL;
+		return -ENODEV;
+	}
+
+	platform_set_drvdata(pdev, drm);
+	return 0;
+}
+
+static int arcpgu_unload(struct drm_device *drm)
+{
+	struct arcpgu_drm_private *arcpgu = drm->dev_private;
+
+	if (arcpgu->fbdev) {
+		drm_fbdev_cma_fini(arcpgu->fbdev);
+		arcpgu->fbdev = NULL;
+	}
+	drm_kms_helper_poll_fini(drm);
+	drm_mode_config_cleanup(drm);
+
+	return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static int arcpgu_show_pxlclock(struct seq_file *m, void *arg)
+{
+	struct drm_info_node *node = (struct drm_info_node *)m->private;
+	struct drm_device *drm = node->minor->dev;
+	struct arcpgu_drm_private *arcpgu = drm->dev_private;
+	unsigned long clkrate = clk_get_rate(arcpgu->clk);
+	unsigned long mode_clock = arcpgu->crtc.mode.crtc_clock * 1000;
+
+	seq_printf(m, "hw  : %lu\n", clkrate);
+	seq_printf(m, "mode: %lu\n", mode_clock);
+	return 0;
+}
+
+static struct drm_info_list arcpgu_debugfs_list[] = {
+	{ "clocks", arcpgu_show_pxlclock, 0 },
+};
+
+static int arcpgu_debugfs_init(struct drm_minor *minor)
+{
+	return drm_debugfs_create_files(arcpgu_debugfs_list,
+		ARRAY_SIZE(arcpgu_debugfs_list), minor->debugfs_root, minor);
+}
+#endif
+
+static struct drm_driver arcpgu_drm_driver = {
+	.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
+			   DRIVER_ATOMIC,
+	.lastclose = arcpgu_lastclose,
+	.name = "arcpgu",
+	.desc = "ARC PGU Controller",
+	.date = "20160219",
+	.major = 1,
+	.minor = 0,
+	.patchlevel = 0,
+	.fops = &arcpgu_drm_ops,
+	.dumb_create = drm_gem_cma_dumb_create,
+	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+	.gem_free_object_unlocked = drm_gem_cma_free_object,
+	.gem_print_info = drm_gem_cma_print_info,
+	.gem_vm_ops = &drm_gem_cma_vm_ops,
+	.gem_prime_export = drm_gem_prime_export,
+	.gem_prime_import = drm_gem_prime_import,
+	.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,
+#ifdef CONFIG_DEBUG_FS
+	.debugfs_init = arcpgu_debugfs_init,
+#endif
+};
+
+static int arcpgu_probe(struct platform_device *pdev)
+{
+	struct drm_device *drm;
+	int ret;
+
+	drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
+	if (IS_ERR(drm))
+		return PTR_ERR(drm);
+
+	ret = arcpgu_load(drm);
+	if (ret)
+		goto err_unref;
+
+	ret = drm_dev_register(drm, 0);
+	if (ret)
+		goto err_unload;
+
+	return 0;
+
+err_unload:
+	arcpgu_unload(drm);
+
+err_unref:
+	drm_dev_unref(drm);
+
+	return ret;
+}
+
+static int arcpgu_remove(struct platform_device *pdev)
+{
+	struct drm_device *drm = platform_get_drvdata(pdev);
+
+	drm_dev_unregister(drm);
+	arcpgu_unload(drm);
+	drm_dev_unref(drm);
+
+	return 0;
+}
+
+static const struct of_device_id arcpgu_of_table[] = {
+	{.compatible = "snps,arcpgu"},
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, arcpgu_of_table);
+
+static struct platform_driver arcpgu_platform_driver = {
+	.probe = arcpgu_probe,
+	.remove = arcpgu_remove,
+	.driver = {
+		   .name = "arcpgu",
+		   .of_match_table = arcpgu_of_table,
+		   },
+};
+
+module_platform_driver(arcpgu_platform_driver);
+
+MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
+MODULE_DESCRIPTION("ARC PGU DRM driver");
+MODULE_LICENSE("GPL");