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bed41005 TC |
1 | /* |
2 | * (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved. | |
3 | * | |
4 | * Parts of this file were based on sources as follows: | |
5 | * | |
6 | * Copyright (c) 2006-2008 Intel Corporation | |
7 | * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> | |
8 | * Copyright (C) 2011 Texas Instruments | |
9 | * | |
10 | * This program is free software and is provided to you under the terms of the | |
11 | * GNU General Public License version 2 as published by the Free Software | |
12 | * Foundation, and any use by you of this program is subject to the terms of | |
13 | * such GNU licence. | |
14 | * | |
15 | */ | |
16 | ||
17 | /** | |
18 | * pl111_drm_connector.c | |
19 | * Implementation of the connector functions for PL111 DRM | |
20 | */ | |
21 | #include <linux/amba/clcd-regs.h> | |
22 | #include <linux/version.h> | |
23 | #include <linux/shmem_fs.h> | |
24 | #include <linux/dma-buf.h> | |
25 | ||
26 | #include <drm/drmP.h> | |
27 | #include <drm/drm_atomic_helper.h> | |
28 | #include <drm/drm_crtc_helper.h> | |
29 | #include <drm/drm_of.h> | |
30 | #include <drm/drm_panel.h> | |
31 | ||
32 | #include "pl111_drm.h" | |
33 | ||
34 | static void pl111_connector_destroy(struct drm_connector *connector) | |
35 | { | |
36 | struct pl111_drm_connector *pl111_connector = | |
37 | to_pl111_connector(connector); | |
38 | ||
39 | if (pl111_connector->panel) | |
40 | drm_panel_detach(pl111_connector->panel); | |
41 | ||
42 | drm_connector_unregister(connector); | |
43 | drm_connector_cleanup(connector); | |
44 | } | |
45 | ||
46 | static enum drm_connector_status pl111_connector_detect(struct drm_connector | |
47 | *connector, bool force) | |
48 | { | |
49 | struct pl111_drm_connector *pl111_connector = | |
50 | to_pl111_connector(connector); | |
51 | ||
52 | return (pl111_connector->panel ? | |
53 | connector_status_connected : | |
54 | connector_status_disconnected); | |
55 | } | |
56 | ||
57 | static int pl111_connector_helper_get_modes(struct drm_connector *connector) | |
58 | { | |
59 | struct pl111_drm_connector *pl111_connector = | |
60 | to_pl111_connector(connector); | |
61 | ||
62 | if (!pl111_connector->panel) | |
63 | return 0; | |
64 | ||
65 | return drm_panel_get_modes(pl111_connector->panel); | |
66 | } | |
67 | ||
68 | const struct drm_connector_funcs connector_funcs = { | |
69 | .fill_modes = drm_helper_probe_single_connector_modes, | |
70 | .destroy = pl111_connector_destroy, | |
71 | .detect = pl111_connector_detect, | |
bed41005 TC |
72 | .reset = drm_atomic_helper_connector_reset, |
73 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
74 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
75 | }; | |
76 | ||
77 | const struct drm_connector_helper_funcs connector_helper_funcs = { | |
78 | .get_modes = pl111_connector_helper_get_modes, | |
79 | }; | |
80 | ||
81 | /* Walks the OF graph to find the panel node and then asks DRM to look | |
82 | * up the panel. | |
83 | */ | |
84 | static struct drm_panel *pl111_get_panel(struct device *dev) | |
85 | { | |
86 | struct device_node *endpoint, *panel_node; | |
87 | struct device_node *np = dev->of_node; | |
88 | struct drm_panel *panel; | |
89 | ||
90 | endpoint = of_graph_get_next_endpoint(np, NULL); | |
91 | if (!endpoint) { | |
92 | dev_err(dev, "no endpoint to fetch panel\n"); | |
93 | return NULL; | |
94 | } | |
95 | ||
96 | /* don't proceed if we have an endpoint but no panel_node tied to it */ | |
97 | panel_node = of_graph_get_remote_port_parent(endpoint); | |
98 | of_node_put(endpoint); | |
99 | if (!panel_node) { | |
100 | dev_err(dev, "no valid panel node\n"); | |
101 | return NULL; | |
102 | } | |
103 | ||
104 | panel = of_drm_find_panel(panel_node); | |
105 | of_node_put(panel_node); | |
106 | ||
107 | return panel; | |
108 | } | |
109 | ||
110 | int pl111_connector_init(struct drm_device *dev) | |
111 | { | |
112 | struct pl111_drm_dev_private *priv = dev->dev_private; | |
113 | struct pl111_drm_connector *pl111_connector = &priv->connector; | |
114 | struct drm_connector *connector = &pl111_connector->connector; | |
115 | ||
116 | drm_connector_init(dev, connector, &connector_funcs, | |
117 | DRM_MODE_CONNECTOR_DPI); | |
118 | drm_connector_helper_add(connector, &connector_helper_funcs); | |
119 | ||
120 | pl111_connector->panel = pl111_get_panel(dev->dev); | |
121 | if (pl111_connector->panel) | |
122 | drm_panel_attach(pl111_connector->panel, connector); | |
123 | ||
124 | return 0; | |
125 | } | |
126 |