4 * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
17 #include <linux/clk.h>
18 #include <drm/drm_crtc_helper.h>
19 #include <drm/drm_fb_cma_helper.h>
20 #include <drm/drm_gem_cma_helper.h>
21 #include <drm/drm_atomic_helper.h>
22 #include <linux/of_reserved_mem.h>
25 #include "arcpgu_regs.h"
27 static void arcpgu_fb_output_poll_changed(struct drm_device *dev)
29 struct arcpgu_drm_private *arcpgu = dev->dev_private;
32 drm_fbdev_cma_hotplug_event(arcpgu->fbdev);
35 static struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
36 .fb_create = drm_fb_cma_create,
37 .output_poll_changed = arcpgu_fb_output_poll_changed,
38 .atomic_check = drm_atomic_helper_check,
39 .atomic_commit = drm_atomic_helper_commit,
42 static void arcpgu_setup_mode_config(struct drm_device *drm)
44 drm_mode_config_init(drm);
45 drm->mode_config.min_width = 0;
46 drm->mode_config.min_height = 0;
47 drm->mode_config.max_width = 1920;
48 drm->mode_config.max_height = 1080;
49 drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
52 int arcpgu_gem_mmap(struct file *filp, struct vm_area_struct *vma)
56 ret = drm_gem_mmap(filp, vma);
60 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
64 static const struct file_operations arcpgu_drm_ops = {
67 .release = drm_release,
68 .unlocked_ioctl = drm_ioctl,
70 .compat_ioctl = drm_compat_ioctl,
75 .mmap = arcpgu_gem_mmap,
78 static void arcpgu_lastclose(struct drm_device *drm)
80 struct arcpgu_drm_private *arcpgu = drm->dev_private;
82 drm_fbdev_cma_restore_mode(arcpgu->fbdev);
85 static int arcpgu_load(struct drm_device *drm)
87 struct platform_device *pdev = to_platform_device(drm->dev);
88 struct arcpgu_drm_private *arcpgu;
89 struct device_node *encoder_node;
93 arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
97 drm->dev_private = arcpgu;
99 arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
100 if (IS_ERR(arcpgu->clk))
101 return PTR_ERR(arcpgu->clk);
103 arcpgu_setup_mode_config(drm);
105 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
106 arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
107 if (IS_ERR(arcpgu->regs)) {
108 dev_err(drm->dev, "Could not remap IO mem\n");
109 return PTR_ERR(arcpgu->regs);
112 dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
113 arc_pgu_read(arcpgu, ARCPGU_REG_ID));
115 /* Get the optional framebuffer memory resource */
116 ret = of_reserved_mem_device_init(drm->dev);
117 if (ret && ret != -ENODEV)
120 if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
123 if (arc_pgu_setup_crtc(drm) < 0)
126 /* find the encoder node and initialize it */
127 encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
129 ret = arcpgu_drm_hdmi_init(drm, encoder_node);
133 ret = arcpgu_drm_sim_init(drm, 0);
138 drm_mode_config_reset(drm);
139 drm_kms_helper_poll_init(drm);
141 arcpgu->fbdev = drm_fbdev_cma_init(drm, 16,
142 drm->mode_config.num_crtc,
143 drm->mode_config.num_connector);
144 if (IS_ERR(arcpgu->fbdev)) {
145 ret = PTR_ERR(arcpgu->fbdev);
146 arcpgu->fbdev = NULL;
150 platform_set_drvdata(pdev, arcpgu);
154 int arcpgu_unload(struct drm_device *drm)
156 struct arcpgu_drm_private *arcpgu = drm->dev_private;
159 drm_fbdev_cma_fini(arcpgu->fbdev);
160 arcpgu->fbdev = NULL;
162 drm_kms_helper_poll_fini(drm);
163 drm_vblank_cleanup(drm);
164 drm_mode_config_cleanup(drm);
169 static struct drm_driver arcpgu_drm_driver = {
170 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
172 .lastclose = arcpgu_lastclose,
173 .name = "drm-arcpgu",
174 .desc = "ARC PGU Controller",
179 .fops = &arcpgu_drm_ops,
180 .dumb_create = drm_gem_cma_dumb_create,
181 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
182 .dumb_destroy = drm_gem_dumb_destroy,
183 .get_vblank_counter = drm_vblank_no_hw_counter,
184 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
185 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
186 .gem_free_object_unlocked = drm_gem_cma_free_object,
187 .gem_vm_ops = &drm_gem_cma_vm_ops,
188 .gem_prime_export = drm_gem_prime_export,
189 .gem_prime_import = drm_gem_prime_import,
190 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
191 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
192 .gem_prime_vmap = drm_gem_cma_prime_vmap,
193 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
194 .gem_prime_mmap = drm_gem_cma_prime_mmap,
197 static int arcpgu_probe(struct platform_device *pdev)
199 struct drm_device *drm;
202 drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
206 ret = arcpgu_load(drm);
210 ret = drm_dev_register(drm, 0);
225 static int arcpgu_remove(struct platform_device *pdev)
227 struct drm_device *drm = platform_get_drvdata(pdev);
229 drm_dev_unregister(drm);
236 static const struct of_device_id arcpgu_of_table[] = {
237 {.compatible = "snps,arcpgu"},
241 MODULE_DEVICE_TABLE(of, arcpgu_of_table);
243 static struct platform_driver arcpgu_platform_driver = {
244 .probe = arcpgu_probe,
245 .remove = arcpgu_remove,
248 .of_match_table = arcpgu_of_table,
252 module_platform_driver(arcpgu_platform_driver);
254 MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
255 MODULE_DESCRIPTION("ARC PGU DRM driver");
256 MODULE_LICENSE("GPL");