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 int arcpgu_atomic_commit(struct drm_device *dev,
36 struct drm_atomic_state *state, bool async)
38 return drm_atomic_helper_commit(dev, state, false);
41 static struct drm_mode_config_funcs arcpgu_drm_modecfg_funcs = {
42 .fb_create = drm_fb_cma_create,
43 .output_poll_changed = arcpgu_fb_output_poll_changed,
44 .atomic_check = drm_atomic_helper_check,
45 .atomic_commit = arcpgu_atomic_commit,
48 static void arcpgu_setup_mode_config(struct drm_device *drm)
50 drm_mode_config_init(drm);
51 drm->mode_config.min_width = 0;
52 drm->mode_config.min_height = 0;
53 drm->mode_config.max_width = 1920;
54 drm->mode_config.max_height = 1080;
55 drm->mode_config.funcs = &arcpgu_drm_modecfg_funcs;
58 int arcpgu_gem_mmap(struct file *filp, struct vm_area_struct *vma)
62 ret = drm_gem_mmap(filp, vma);
66 vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags));
70 static const struct file_operations arcpgu_drm_ops = {
73 .release = drm_release,
74 .unlocked_ioctl = drm_ioctl,
76 .compat_ioctl = drm_compat_ioctl,
81 .mmap = arcpgu_gem_mmap,
84 static void arcpgu_preclose(struct drm_device *drm, struct drm_file *file)
86 struct arcpgu_drm_private *arcpgu = drm->dev_private;
87 struct drm_pending_vblank_event *e, *t;
90 spin_lock_irqsave(&drm->event_lock, flags);
91 list_for_each_entry_safe(e, t, &arcpgu->event_list, base.link) {
92 if (e->base.file_priv != file)
94 list_del(&e->base.link);
95 e->base.destroy(&e->base);
97 spin_unlock_irqrestore(&drm->event_lock, flags);
100 static void arcpgu_lastclose(struct drm_device *drm)
102 struct arcpgu_drm_private *arcpgu = drm->dev_private;
104 drm_fbdev_cma_restore_mode(arcpgu->fbdev);
107 static int arcpgu_load(struct drm_device *drm)
109 struct platform_device *pdev = to_platform_device(drm->dev);
110 struct arcpgu_drm_private *arcpgu;
111 struct device_node *encoder_node;
112 struct resource *res;
115 arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL);
119 drm->dev_private = arcpgu;
121 arcpgu->clk = devm_clk_get(drm->dev, "pxlclk");
122 if (IS_ERR(arcpgu->clk))
123 return PTR_ERR(arcpgu->clk);
125 INIT_LIST_HEAD(&arcpgu->event_list);
127 arcpgu_setup_mode_config(drm);
129 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
130 arcpgu->regs = devm_ioremap_resource(&pdev->dev, res);
131 if (IS_ERR(arcpgu->regs)) {
132 dev_err(drm->dev, "Could not remap IO mem\n");
133 return PTR_ERR(arcpgu->regs);
136 dev_info(drm->dev, "arc_pgu ID: 0x%x\n",
137 arc_pgu_read(arcpgu, ARCPGU_REG_ID));
139 /* Get the optional framebuffer memory resource */
140 ret = of_reserved_mem_device_init(drm->dev);
141 if (ret && ret != -ENODEV)
144 if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32)))
147 if (arc_pgu_setup_crtc(drm) < 0)
150 /* find the encoder node and initialize it */
151 encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
153 dev_err(drm->dev, "failed to get an encoder slave node\n");
157 ret = arcpgu_drm_hdmi_init(drm, encoder_node);
161 drm_mode_config_reset(drm);
162 drm_kms_helper_poll_init(drm);
164 arcpgu->fbdev = drm_fbdev_cma_init(drm, 16,
165 drm->mode_config.num_crtc,
166 drm->mode_config.num_connector);
167 if (IS_ERR(arcpgu->fbdev)) {
168 ret = PTR_ERR(arcpgu->fbdev);
169 arcpgu->fbdev = NULL;
173 platform_set_drvdata(pdev, arcpgu);
177 int arcpgu_unload(struct drm_device *drm)
179 struct arcpgu_drm_private *arcpgu = drm->dev_private;
182 drm_fbdev_cma_fini(arcpgu->fbdev);
183 arcpgu->fbdev = NULL;
185 drm_kms_helper_poll_fini(drm);
186 drm_vblank_cleanup(drm);
187 drm_mode_config_cleanup(drm);
192 static struct drm_driver arcpgu_drm_driver = {
193 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
195 .preclose = arcpgu_preclose,
196 .lastclose = arcpgu_lastclose,
197 .name = "drm-arcpgu",
198 .desc = "ARC PGU Controller",
203 .fops = &arcpgu_drm_ops,
204 .dumb_create = drm_gem_cma_dumb_create,
205 .dumb_map_offset = drm_gem_cma_dumb_map_offset,
206 .dumb_destroy = drm_gem_dumb_destroy,
207 .get_vblank_counter = drm_vblank_no_hw_counter,
208 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
209 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
210 .gem_free_object = drm_gem_cma_free_object,
211 .gem_vm_ops = &drm_gem_cma_vm_ops,
212 .gem_prime_export = drm_gem_prime_export,
213 .gem_prime_import = drm_gem_prime_import,
214 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
215 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
216 .gem_prime_vmap = drm_gem_cma_prime_vmap,
217 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
218 .gem_prime_mmap = drm_gem_cma_prime_mmap,
221 static int arcpgu_probe(struct platform_device *pdev)
223 struct drm_device *drm;
226 drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev);
230 ret = arcpgu_load(drm);
234 ret = drm_dev_register(drm, 0);
238 ret = drm_connector_register_all(drm);
245 drm_dev_unregister(drm);
256 static int arcpgu_remove(struct platform_device *pdev)
258 struct drm_device *drm = platform_get_drvdata(pdev);
260 drm_connector_unregister_all(drm);
261 drm_dev_unregister(drm);
268 static const struct of_device_id arcpgu_of_table[] = {
269 {.compatible = "snps,arcpgu"},
273 MODULE_DEVICE_TABLE(of, arcpgu_of_table);
275 static struct platform_driver arcpgu_platform_driver = {
276 .probe = arcpgu_probe,
277 .remove = arcpgu_remove,
280 .of_match_table = arcpgu_of_table,
284 module_platform_driver(arcpgu_platform_driver);
286 MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>");
287 MODULE_DESCRIPTION("ARC PGU DRM driver");
288 MODULE_LICENSE("GPL");