source: src/linux/universal/linux-4.9/drivers/gpu/drm/sun4i/sun4i_drv.c @ 31859

Last change on this file since 31859 was 31859, checked in by brainslayer, 4 months ago

kernel update

File size: 8.6 KB
Line 
1/*
2 * Copyright (C) 2015 Free Electrons
3 * Copyright (C) 2015 NextThing Co
4 *
5 * Maxime Ripard <maxime.ripard@free-electrons.com>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 */
12
13#include <linux/component.h>
14#include <linux/of_graph.h>
15
16#include <drm/drmP.h>
17#include <drm/drm_crtc_helper.h>
18#include <drm/drm_fb_cma_helper.h>
19#include <drm/drm_gem_cma_helper.h>
20#include <drm/drm_fb_helper.h>
21
22#include "sun4i_crtc.h"
23#include "sun4i_drv.h"
24#include "sun4i_framebuffer.h"
25#include "sun4i_layer.h"
26#include "sun4i_tcon.h"
27
28static int sun4i_drv_enable_vblank(struct drm_device *drm, unsigned int pipe)
29{
30        struct sun4i_drv *drv = drm->dev_private;
31        struct sun4i_tcon *tcon = drv->tcon;
32
33        DRM_DEBUG_DRIVER("Enabling VBLANK on pipe %d\n", pipe);
34
35        sun4i_tcon_enable_vblank(tcon, true);
36
37        return 0;
38}
39
40static void sun4i_drv_disable_vblank(struct drm_device *drm, unsigned int pipe)
41{
42        struct sun4i_drv *drv = drm->dev_private;
43        struct sun4i_tcon *tcon = drv->tcon;
44
45        DRM_DEBUG_DRIVER("Disabling VBLANK on pipe %d\n", pipe);
46
47        sun4i_tcon_enable_vblank(tcon, false);
48}
49
50static const struct file_operations sun4i_drv_fops = {
51        .owner          = THIS_MODULE,
52        .open           = drm_open,
53        .release        = drm_release,
54        .unlocked_ioctl = drm_ioctl,
55#ifdef CONFIG_COMPAT
56        .compat_ioctl   = drm_compat_ioctl,
57#endif
58        .poll           = drm_poll,
59        .read           = drm_read,
60        .llseek         = no_llseek,
61        .mmap           = drm_gem_cma_mmap,
62};
63
64static struct drm_driver sun4i_drv_driver = {
65        .driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME | DRIVER_ATOMIC,
66
67        /* Generic Operations */
68        .fops                   = &sun4i_drv_fops,
69        .name                   = "sun4i-drm",
70        .desc                   = "Allwinner sun4i Display Engine",
71        .date                   = "20150629",
72        .major                  = 1,
73        .minor                  = 0,
74
75        /* GEM Operations */
76        .dumb_create            = drm_gem_cma_dumb_create,
77        .dumb_destroy           = drm_gem_dumb_destroy,
78        .dumb_map_offset        = drm_gem_cma_dumb_map_offset,
79        .gem_free_object_unlocked = drm_gem_cma_free_object,
80        .gem_vm_ops             = &drm_gem_cma_vm_ops,
81
82        /* PRIME Operations */
83        .prime_handle_to_fd     = drm_gem_prime_handle_to_fd,
84        .prime_fd_to_handle     = drm_gem_prime_fd_to_handle,
85        .gem_prime_import       = drm_gem_prime_import,
86        .gem_prime_export       = drm_gem_prime_export,
87        .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
88        .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
89        .gem_prime_vmap         = drm_gem_cma_prime_vmap,
90        .gem_prime_vunmap       = drm_gem_cma_prime_vunmap,
91        .gem_prime_mmap         = drm_gem_cma_prime_mmap,
92
93        /* Frame Buffer Operations */
94
95        /* VBlank Operations */
96        .get_vblank_counter     = drm_vblank_no_hw_counter,
97        .enable_vblank          = sun4i_drv_enable_vblank,
98        .disable_vblank         = sun4i_drv_disable_vblank,
99};
100
101static void sun4i_remove_framebuffers(void)
102{
103        struct apertures_struct *ap;
104
105        ap = alloc_apertures(1);
106        if (!ap)
107                return;
108
109        /* The framebuffer can be located anywhere in RAM */
110        ap->ranges[0].base = 0;
111        ap->ranges[0].size = ~0;
112
113        drm_fb_helper_remove_conflicting_framebuffers(ap, "sun4i-drm-fb", false);
114        kfree(ap);
115}
116
117static int sun4i_drv_bind(struct device *dev)
118{
119        struct drm_device *drm;
120        struct sun4i_drv *drv;
121        int ret;
122
123        drm = drm_dev_alloc(&sun4i_drv_driver, dev);
124        if (IS_ERR(drm))
125                return PTR_ERR(drm);
126
127        drv = devm_kzalloc(dev, sizeof(*drv), GFP_KERNEL);
128        if (!drv) {
129                ret = -ENOMEM;
130                goto free_drm;
131        }
132        drm->dev_private = drv;
133
134        drm_vblank_init(drm, 1);
135        drm_mode_config_init(drm);
136
137        ret = component_bind_all(drm->dev, drm);
138        if (ret) {
139                dev_err(drm->dev, "Couldn't bind all pipelines components\n");
140                goto free_drm;
141        }
142
143        /* Create our layers */
144        drv->layers = sun4i_layers_init(drm);
145        if (IS_ERR(drv->layers)) {
146                dev_err(drm->dev, "Couldn't create the planes\n");
147                ret = PTR_ERR(drv->layers);
148                goto free_drm;
149        }
150
151        /* Create our CRTC */
152        drv->crtc = sun4i_crtc_init(drm);
153        if (!drv->crtc) {
154                dev_err(drm->dev, "Couldn't create the CRTC\n");
155                ret = -EINVAL;
156                goto free_drm;
157        }
158        drm->irq_enabled = true;
159
160        /* Remove early framebuffers (ie. simplefb) */
161        sun4i_remove_framebuffers();
162
163        /* Create our framebuffer */
164        drv->fbdev = sun4i_framebuffer_init(drm);
165        if (IS_ERR(drv->fbdev)) {
166                dev_err(drm->dev, "Couldn't create our framebuffer\n");
167                ret = PTR_ERR(drv->fbdev);
168                goto free_drm;
169        }
170
171        /* Enable connectors polling */
172        drm_kms_helper_poll_init(drm);
173
174        ret = drm_dev_register(drm, 0);
175        if (ret)
176                goto free_drm;
177
178        return 0;
179
180free_drm:
181        drm_dev_unref(drm);
182        return ret;
183}
184
185static void sun4i_drv_unbind(struct device *dev)
186{
187        struct drm_device *drm = dev_get_drvdata(dev);
188
189        drm_dev_unregister(drm);
190        drm_kms_helper_poll_fini(drm);
191        sun4i_framebuffer_free(drm);
192        drm_vblank_cleanup(drm);
193        drm_dev_unref(drm);
194}
195
196static const struct component_master_ops sun4i_drv_master_ops = {
197        .bind   = sun4i_drv_bind,
198        .unbind = sun4i_drv_unbind,
199};
200
201static bool sun4i_drv_node_is_frontend(struct device_node *node)
202{
203        return of_device_is_compatible(node, "allwinner,sun5i-a13-display-frontend") ||
204                of_device_is_compatible(node, "allwinner,sun6i-a31-display-frontend") ||
205                of_device_is_compatible(node, "allwinner,sun8i-a33-display-frontend");
206}
207
208static bool sun4i_drv_node_is_tcon(struct device_node *node)
209{
210        return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon") ||
211                of_device_is_compatible(node, "allwinner,sun6i-a31-tcon") ||
212                of_device_is_compatible(node, "allwinner,sun6i-a31s-tcon") ||
213                of_device_is_compatible(node, "allwinner,sun8i-a33-tcon");
214}
215
216static int compare_of(struct device *dev, void *data)
217{
218        DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
219                         of_node_full_name(dev->of_node),
220                         of_node_full_name(data));
221
222        return dev->of_node == data;
223}
224
225static int sun4i_drv_add_endpoints(struct device *dev,
226                                   struct component_match **match,
227                                   struct device_node *node)
228{
229        struct device_node *port, *ep, *remote;
230        int count = 0;
231
232        /*
233         * We don't support the frontend for now, so we will never
234         * have a device bound. Just skip over it, but we still want
235         * the rest our pipeline to be added.
236         */
237        if (!sun4i_drv_node_is_frontend(node) &&
238            !of_device_is_available(node))
239                return 0;
240
241        if (!sun4i_drv_node_is_frontend(node)) {
242                /* Add current component */
243                DRM_DEBUG_DRIVER("Adding component %s\n",
244                                 of_node_full_name(node));
245                component_match_add(dev, match, compare_of, node);
246                count++;
247        }
248
249        /* Inputs are listed first, then outputs */
250        port = of_graph_get_port_by_id(node, 1);
251        if (!port) {
252                DRM_DEBUG_DRIVER("No output to bind\n");
253                return count;
254        }
255
256        for_each_available_child_of_node(port, ep) {
257                remote = of_graph_get_remote_port_parent(ep);
258                if (!remote) {
259                        DRM_DEBUG_DRIVER("Error retrieving the output node\n");
260                        of_node_put(remote);
261                        continue;
262                }
263
264                /*
265                 * If the node is our TCON, the first port is used for
266                 * panel or bridges, and will not be part of the
267                 * component framework.
268                 */
269                if (sun4i_drv_node_is_tcon(node)) {
270                        struct of_endpoint endpoint;
271
272                        if (of_graph_parse_endpoint(ep, &endpoint)) {
273                                DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
274                                continue;
275                        }
276
277                        if (!endpoint.id) {
278                                DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
279                                continue;
280                        }
281                }
282
283                /* Walk down our tree */
284                count += sun4i_drv_add_endpoints(dev, match, remote);
285
286                of_node_put(remote);
287        }
288
289        return count;
290}
291
292static int sun4i_drv_probe(struct platform_device *pdev)
293{
294        struct component_match *match = NULL;
295        struct device_node *np = pdev->dev.of_node;
296        int i, count = 0;
297
298        for (i = 0;; i++) {
299                struct device_node *pipeline = of_parse_phandle(np,
300                                                                "allwinner,pipelines",
301                                                                i);
302                if (!pipeline)
303                        break;
304
305                count += sun4i_drv_add_endpoints(&pdev->dev, &match,
306                                                pipeline);
307                of_node_put(pipeline);
308
309                DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n",
310                                 count, i);
311        }
312
313        if (count)
314                return component_master_add_with_match(&pdev->dev,
315                                                       &sun4i_drv_master_ops,
316                                                       match);
317        else
318                return 0;
319}
320
321static int sun4i_drv_remove(struct platform_device *pdev)
322{
323        return 0;
324}
325
326static const struct of_device_id sun4i_drv_of_table[] = {
327        { .compatible = "allwinner,sun5i-a13-display-engine" },
328        { .compatible = "allwinner,sun6i-a31-display-engine" },
329        { .compatible = "allwinner,sun6i-a31s-display-engine" },
330        { .compatible = "allwinner,sun8i-a33-display-engine" },
331        { }
332};
333MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
334
335static struct platform_driver sun4i_drv_platform_driver = {
336        .probe          = sun4i_drv_probe,
337        .remove         = sun4i_drv_remove,
338        .driver         = {
339                .name           = "sun4i-drm",
340                .of_match_table = sun4i_drv_of_table,
341        },
342};
343module_platform_driver(sun4i_drv_platform_driver);
344
345MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
346MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
347MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
348MODULE_LICENSE("GPL");
Note: See TracBrowser for help on using the repository browser.