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51dacf20 CP |
1 | /* |
2 | * ARC PGU DRM driver. | |
3 | * | |
4 | * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) | |
5 | * | |
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. | |
9 | * | |
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. | |
14 | * | |
15 | */ | |
16 | ||
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> | |
8aeab995 | 22 | #include <linux/of_reserved_mem.h> |
51dacf20 CP |
23 | |
24 | #include "arcpgu.h" | |
25 | #include "arcpgu_regs.h" | |
26 | ||
27 | static void arcpgu_fb_output_poll_changed(struct drm_device *dev) | |
28 | { | |
29 | struct arcpgu_drm_private *arcpgu = dev->dev_private; | |
30 | ||
31 | if (arcpgu->fbdev) | |
32 | drm_fbdev_cma_hotplug_event(arcpgu->fbdev); | |
33 | } | |
34 | ||
35 | static int arcpgu_atomic_commit(struct drm_device *dev, | |
36 | struct drm_atomic_state *state, bool async) | |
37 | { | |
38 | return drm_atomic_helper_commit(dev, state, false); | |
39 | } | |
40 | ||
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, | |
46 | }; | |
47 | ||
48 | static void arcpgu_setup_mode_config(struct drm_device *drm) | |
49 | { | |
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; | |
56 | } | |
57 | ||
58 | int arcpgu_gem_mmap(struct file *filp, struct vm_area_struct *vma) | |
59 | { | |
60 | int ret; | |
61 | ||
62 | ret = drm_gem_mmap(filp, vma); | |
63 | if (ret) | |
64 | return ret; | |
65 | ||
66 | vma->vm_page_prot = pgprot_noncached(vm_get_page_prot(vma->vm_flags)); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | static const struct file_operations arcpgu_drm_ops = { | |
71 | .owner = THIS_MODULE, | |
72 | .open = drm_open, | |
73 | .release = drm_release, | |
74 | .unlocked_ioctl = drm_ioctl, | |
75 | #ifdef CONFIG_COMPAT | |
76 | .compat_ioctl = drm_compat_ioctl, | |
77 | #endif | |
78 | .poll = drm_poll, | |
79 | .read = drm_read, | |
80 | .llseek = no_llseek, | |
81 | .mmap = arcpgu_gem_mmap, | |
82 | }; | |
83 | ||
51dacf20 CP |
84 | static void arcpgu_lastclose(struct drm_device *drm) |
85 | { | |
86 | struct arcpgu_drm_private *arcpgu = drm->dev_private; | |
87 | ||
88 | drm_fbdev_cma_restore_mode(arcpgu->fbdev); | |
89 | } | |
90 | ||
91 | static int arcpgu_load(struct drm_device *drm) | |
92 | { | |
93 | struct platform_device *pdev = to_platform_device(drm->dev); | |
94 | struct arcpgu_drm_private *arcpgu; | |
95 | struct device_node *encoder_node; | |
96 | struct resource *res; | |
97 | int ret; | |
98 | ||
99 | arcpgu = devm_kzalloc(&pdev->dev, sizeof(*arcpgu), GFP_KERNEL); | |
100 | if (arcpgu == NULL) | |
101 | return -ENOMEM; | |
102 | ||
103 | drm->dev_private = arcpgu; | |
104 | ||
105 | arcpgu->clk = devm_clk_get(drm->dev, "pxlclk"); | |
106 | if (IS_ERR(arcpgu->clk)) | |
107 | return PTR_ERR(arcpgu->clk); | |
108 | ||
51dacf20 CP |
109 | arcpgu_setup_mode_config(drm); |
110 | ||
111 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
112 | arcpgu->regs = devm_ioremap_resource(&pdev->dev, res); | |
113 | if (IS_ERR(arcpgu->regs)) { | |
114 | dev_err(drm->dev, "Could not remap IO mem\n"); | |
115 | return PTR_ERR(arcpgu->regs); | |
116 | } | |
117 | ||
118 | dev_info(drm->dev, "arc_pgu ID: 0x%x\n", | |
119 | arc_pgu_read(arcpgu, ARCPGU_REG_ID)); | |
120 | ||
8aeab995 AB |
121 | /* Get the optional framebuffer memory resource */ |
122 | ret = of_reserved_mem_device_init(drm->dev); | |
123 | if (ret && ret != -ENODEV) | |
124 | return ret; | |
125 | ||
51dacf20 CP |
126 | if (dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32))) |
127 | return -ENODEV; | |
128 | ||
129 | if (arc_pgu_setup_crtc(drm) < 0) | |
130 | return -ENODEV; | |
131 | ||
132 | /* find the encoder node and initialize it */ | |
133 | encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0); | |
134 | if (!encoder_node) { | |
135 | dev_err(drm->dev, "failed to get an encoder slave node\n"); | |
136 | return -ENODEV; | |
137 | } | |
138 | ||
139 | ret = arcpgu_drm_hdmi_init(drm, encoder_node); | |
140 | if (ret < 0) | |
141 | return ret; | |
142 | ||
143 | drm_mode_config_reset(drm); | |
144 | drm_kms_helper_poll_init(drm); | |
145 | ||
146 | arcpgu->fbdev = drm_fbdev_cma_init(drm, 16, | |
147 | drm->mode_config.num_crtc, | |
148 | drm->mode_config.num_connector); | |
149 | if (IS_ERR(arcpgu->fbdev)) { | |
150 | ret = PTR_ERR(arcpgu->fbdev); | |
151 | arcpgu->fbdev = NULL; | |
152 | return -ENODEV; | |
153 | } | |
154 | ||
155 | platform_set_drvdata(pdev, arcpgu); | |
156 | return 0; | |
157 | } | |
158 | ||
159 | int arcpgu_unload(struct drm_device *drm) | |
160 | { | |
161 | struct arcpgu_drm_private *arcpgu = drm->dev_private; | |
162 | ||
163 | if (arcpgu->fbdev) { | |
164 | drm_fbdev_cma_fini(arcpgu->fbdev); | |
165 | arcpgu->fbdev = NULL; | |
166 | } | |
167 | drm_kms_helper_poll_fini(drm); | |
168 | drm_vblank_cleanup(drm); | |
169 | drm_mode_config_cleanup(drm); | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static struct drm_driver arcpgu_drm_driver = { | |
175 | .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | | |
176 | DRIVER_ATOMIC, | |
51dacf20 CP |
177 | .lastclose = arcpgu_lastclose, |
178 | .name = "drm-arcpgu", | |
179 | .desc = "ARC PGU Controller", | |
180 | .date = "20160219", | |
181 | .major = 1, | |
182 | .minor = 0, | |
183 | .patchlevel = 0, | |
184 | .fops = &arcpgu_drm_ops, | |
185 | .dumb_create = drm_gem_cma_dumb_create, | |
186 | .dumb_map_offset = drm_gem_cma_dumb_map_offset, | |
187 | .dumb_destroy = drm_gem_dumb_destroy, | |
188 | .get_vblank_counter = drm_vblank_no_hw_counter, | |
189 | .prime_handle_to_fd = drm_gem_prime_handle_to_fd, | |
190 | .prime_fd_to_handle = drm_gem_prime_fd_to_handle, | |
e1512ee0 | 191 | .gem_free_object_unlocked = drm_gem_cma_free_object, |
51dacf20 CP |
192 | .gem_vm_ops = &drm_gem_cma_vm_ops, |
193 | .gem_prime_export = drm_gem_prime_export, | |
194 | .gem_prime_import = drm_gem_prime_import, | |
195 | .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, | |
196 | .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, | |
197 | .gem_prime_vmap = drm_gem_cma_prime_vmap, | |
198 | .gem_prime_vunmap = drm_gem_cma_prime_vunmap, | |
199 | .gem_prime_mmap = drm_gem_cma_prime_mmap, | |
200 | }; | |
201 | ||
202 | static int arcpgu_probe(struct platform_device *pdev) | |
203 | { | |
204 | struct drm_device *drm; | |
205 | int ret; | |
206 | ||
207 | drm = drm_dev_alloc(&arcpgu_drm_driver, &pdev->dev); | |
208 | if (!drm) | |
209 | return -ENOMEM; | |
210 | ||
211 | ret = arcpgu_load(drm); | |
212 | if (ret) | |
213 | goto err_unref; | |
214 | ||
215 | ret = drm_dev_register(drm, 0); | |
216 | if (ret) | |
217 | goto err_unload; | |
218 | ||
219 | ret = drm_connector_register_all(drm); | |
220 | if (ret) | |
221 | goto err_unregister; | |
222 | ||
223 | return 0; | |
224 | ||
225 | err_unregister: | |
226 | drm_dev_unregister(drm); | |
227 | ||
228 | err_unload: | |
229 | arcpgu_unload(drm); | |
230 | ||
231 | err_unref: | |
232 | drm_dev_unref(drm); | |
233 | ||
234 | return ret; | |
235 | } | |
236 | ||
237 | static int arcpgu_remove(struct platform_device *pdev) | |
238 | { | |
239 | struct drm_device *drm = platform_get_drvdata(pdev); | |
240 | ||
241 | drm_connector_unregister_all(drm); | |
242 | drm_dev_unregister(drm); | |
243 | arcpgu_unload(drm); | |
244 | drm_dev_unref(drm); | |
245 | ||
246 | return 0; | |
247 | } | |
248 | ||
249 | static const struct of_device_id arcpgu_of_table[] = { | |
250 | {.compatible = "snps,arcpgu"}, | |
251 | {} | |
252 | }; | |
253 | ||
254 | MODULE_DEVICE_TABLE(of, arcpgu_of_table); | |
255 | ||
256 | static struct platform_driver arcpgu_platform_driver = { | |
257 | .probe = arcpgu_probe, | |
258 | .remove = arcpgu_remove, | |
259 | .driver = { | |
260 | .name = "arcpgu", | |
261 | .of_match_table = arcpgu_of_table, | |
262 | }, | |
263 | }; | |
264 | ||
265 | module_platform_driver(arcpgu_platform_driver); | |
266 | ||
267 | MODULE_AUTHOR("Carlos Palminha <palminha@synopsys.com>"); | |
268 | MODULE_DESCRIPTION("ARC PGU DRM driver"); | |
269 | MODULE_LICENSE("GPL"); |