2 * Copyright (C) 2015 Free Electrons
3 * Copyright (C) 2015 NextThing Co
5 * Maxime Ripard <maxime.ripard@free-electrons.com>
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.
13 #include <linux/component.h>
14 #include <linux/of_graph.h>
15 #include <linux/of_reserved_mem.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_fb_helper.h>
22 #include <drm/drm_of.h>
24 #include "sun4i_drv.h"
25 #include "sun4i_framebuffer.h"
26 #include "sun4i_tcon.h"
28 static void sun4i_drv_lastclose(struct drm_device
*dev
)
30 struct sun4i_drv
*drv
= dev
->dev_private
;
32 drm_fbdev_cma_restore_mode(drv
->fbdev
);
35 DEFINE_DRM_GEM_CMA_FOPS(sun4i_drv_fops
);
37 static struct drm_driver sun4i_drv_driver
= {
38 .driver_features
= DRIVER_GEM
| DRIVER_MODESET
| DRIVER_PRIME
| DRIVER_ATOMIC
,
40 /* Generic Operations */
41 .lastclose
= sun4i_drv_lastclose
,
42 .fops
= &sun4i_drv_fops
,
44 .desc
= "Allwinner sun4i Display Engine",
50 .dumb_create
= drm_gem_cma_dumb_create
,
51 .dumb_destroy
= drm_gem_dumb_destroy
,
52 .dumb_map_offset
= drm_gem_cma_dumb_map_offset
,
53 .gem_free_object_unlocked
= drm_gem_cma_free_object
,
54 .gem_vm_ops
= &drm_gem_cma_vm_ops
,
56 /* PRIME Operations */
57 .prime_handle_to_fd
= drm_gem_prime_handle_to_fd
,
58 .prime_fd_to_handle
= drm_gem_prime_fd_to_handle
,
59 .gem_prime_import
= drm_gem_prime_import
,
60 .gem_prime_export
= drm_gem_prime_export
,
61 .gem_prime_get_sg_table
= drm_gem_cma_prime_get_sg_table
,
62 .gem_prime_import_sg_table
= drm_gem_cma_prime_import_sg_table
,
63 .gem_prime_vmap
= drm_gem_cma_prime_vmap
,
64 .gem_prime_vunmap
= drm_gem_cma_prime_vunmap
,
65 .gem_prime_mmap
= drm_gem_cma_prime_mmap
,
67 /* Frame Buffer Operations */
70 static void sun4i_remove_framebuffers(void)
72 struct apertures_struct
*ap
;
74 ap
= alloc_apertures(1);
78 /* The framebuffer can be located anywhere in RAM */
79 ap
->ranges
[0].base
= 0;
80 ap
->ranges
[0].size
= ~0;
82 drm_fb_helper_remove_conflicting_framebuffers(ap
, "sun4i-drm-fb", false);
86 static int sun4i_drv_bind(struct device
*dev
)
88 struct drm_device
*drm
;
89 struct sun4i_drv
*drv
;
92 drm
= drm_dev_alloc(&sun4i_drv_driver
, dev
);
96 drv
= devm_kzalloc(dev
, sizeof(*drv
), GFP_KERNEL
);
101 drm
->dev_private
= drv
;
102 INIT_LIST_HEAD(&drv
->engine_list
);
103 INIT_LIST_HEAD(&drv
->tcon_list
);
105 ret
= of_reserved_mem_device_init(dev
);
106 if (ret
&& ret
!= -ENODEV
) {
107 dev_err(drm
->dev
, "Couldn't claim our memory region\n");
111 /* drm_vblank_init calls kcalloc, which can fail */
112 ret
= drm_vblank_init(drm
, 1);
114 goto free_mem_region
;
116 drm_mode_config_init(drm
);
118 ret
= component_bind_all(drm
->dev
, drm
);
120 dev_err(drm
->dev
, "Couldn't bind all pipelines components\n");
121 goto cleanup_mode_config
;
124 drm
->irq_enabled
= true;
126 /* Remove early framebuffers (ie. simplefb) */
127 sun4i_remove_framebuffers();
129 /* Create our framebuffer */
130 drv
->fbdev
= sun4i_framebuffer_init(drm
);
131 if (IS_ERR(drv
->fbdev
)) {
132 dev_err(drm
->dev
, "Couldn't create our framebuffer\n");
133 ret
= PTR_ERR(drv
->fbdev
);
134 goto cleanup_mode_config
;
137 /* Enable connectors polling */
138 drm_kms_helper_poll_init(drm
);
140 ret
= drm_dev_register(drm
, 0);
147 drm_kms_helper_poll_fini(drm
);
148 sun4i_framebuffer_free(drm
);
150 drm_mode_config_cleanup(drm
);
152 of_reserved_mem_device_release(dev
);
158 static void sun4i_drv_unbind(struct device
*dev
)
160 struct drm_device
*drm
= dev_get_drvdata(dev
);
162 drm_dev_unregister(drm
);
163 drm_kms_helper_poll_fini(drm
);
164 sun4i_framebuffer_free(drm
);
165 drm_mode_config_cleanup(drm
);
166 of_reserved_mem_device_release(dev
);
170 static const struct component_master_ops sun4i_drv_master_ops
= {
171 .bind
= sun4i_drv_bind
,
172 .unbind
= sun4i_drv_unbind
,
175 static bool sun4i_drv_node_is_connector(struct device_node
*node
)
177 return of_device_is_compatible(node
, "hdmi-connector");
180 static bool sun4i_drv_node_is_frontend(struct device_node
*node
)
182 return of_device_is_compatible(node
, "allwinner,sun5i-a13-display-frontend") ||
183 of_device_is_compatible(node
, "allwinner,sun6i-a31-display-frontend") ||
184 of_device_is_compatible(node
, "allwinner,sun8i-a33-display-frontend");
187 static bool sun4i_drv_node_is_tcon(struct device_node
*node
)
189 return of_device_is_compatible(node
, "allwinner,sun5i-a13-tcon") ||
190 of_device_is_compatible(node
, "allwinner,sun6i-a31-tcon") ||
191 of_device_is_compatible(node
, "allwinner,sun6i-a31s-tcon") ||
192 of_device_is_compatible(node
, "allwinner,sun8i-a33-tcon") ||
193 of_device_is_compatible(node
, "allwinner,sun8i-v3s-tcon");
196 static int compare_of(struct device
*dev
, void *data
)
198 DRM_DEBUG_DRIVER("Comparing of node %s with %s\n",
199 of_node_full_name(dev
->of_node
),
200 of_node_full_name(data
));
202 return dev
->of_node
== data
;
205 static int sun4i_drv_add_endpoints(struct device
*dev
,
206 struct component_match
**match
,
207 struct device_node
*node
)
209 struct device_node
*port
, *ep
, *remote
;
213 * We don't support the frontend for now, so we will never
214 * have a device bound. Just skip over it, but we still want
215 * the rest our pipeline to be added.
217 if (!sun4i_drv_node_is_frontend(node
) &&
218 !of_device_is_available(node
))
222 * The connectors will be the last nodes in our pipeline, we
225 if (sun4i_drv_node_is_connector(node
))
228 if (!sun4i_drv_node_is_frontend(node
)) {
229 /* Add current component */
230 DRM_DEBUG_DRIVER("Adding component %s\n",
231 of_node_full_name(node
));
232 drm_of_component_match_add(dev
, match
, compare_of
, node
);
236 /* Inputs are listed first, then outputs */
237 port
= of_graph_get_port_by_id(node
, 1);
239 DRM_DEBUG_DRIVER("No output to bind\n");
243 for_each_available_child_of_node(port
, ep
) {
244 remote
= of_graph_get_remote_port_parent(ep
);
246 DRM_DEBUG_DRIVER("Error retrieving the output node\n");
252 * If the node is our TCON, the first port is used for
253 * panel or bridges, and will not be part of the
254 * component framework.
256 if (sun4i_drv_node_is_tcon(node
)) {
257 struct of_endpoint endpoint
;
259 if (of_graph_parse_endpoint(ep
, &endpoint
)) {
260 DRM_DEBUG_DRIVER("Couldn't parse endpoint\n");
265 DRM_DEBUG_DRIVER("Endpoint is our panel... skipping\n");
270 /* Walk down our tree */
271 count
+= sun4i_drv_add_endpoints(dev
, match
, remote
);
279 static int sun4i_drv_probe(struct platform_device
*pdev
)
281 struct component_match
*match
= NULL
;
282 struct device_node
*np
= pdev
->dev
.of_node
;
286 struct device_node
*pipeline
= of_parse_phandle(np
,
287 "allwinner,pipelines",
292 count
+= sun4i_drv_add_endpoints(&pdev
->dev
, &match
,
294 of_node_put(pipeline
);
296 DRM_DEBUG_DRIVER("Queued %d outputs on pipeline %d\n",
301 return component_master_add_with_match(&pdev
->dev
,
302 &sun4i_drv_master_ops
,
308 static int sun4i_drv_remove(struct platform_device
*pdev
)
313 static const struct of_device_id sun4i_drv_of_table
[] = {
314 { .compatible
= "allwinner,sun5i-a10s-display-engine" },
315 { .compatible
= "allwinner,sun5i-a13-display-engine" },
316 { .compatible
= "allwinner,sun6i-a31-display-engine" },
317 { .compatible
= "allwinner,sun6i-a31s-display-engine" },
318 { .compatible
= "allwinner,sun8i-a33-display-engine" },
319 { .compatible
= "allwinner,sun8i-v3s-display-engine" },
322 MODULE_DEVICE_TABLE(of
, sun4i_drv_of_table
);
324 static struct platform_driver sun4i_drv_platform_driver
= {
325 .probe
= sun4i_drv_probe
,
326 .remove
= sun4i_drv_remove
,
329 .of_match_table
= sun4i_drv_of_table
,
332 module_platform_driver(sun4i_drv_platform_driver
);
334 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
335 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
336 MODULE_DESCRIPTION("Allwinner A10 Display Engine DRM/KMS Driver");
337 MODULE_LICENSE("GPL");