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3e87599b RC |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * Author: Vinay Simha <vinaysimha@inforcecomputing.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License version 2 as published by | |
8 | * the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along with | |
16 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include <linux/gpio.h> | |
20 | ||
21 | #include "mdp4_kms.h" | |
22 | ||
23 | struct mdp4_lvds_connector { | |
24 | struct drm_connector base; | |
25 | struct drm_encoder *encoder; | |
a6bf7f63 | 26 | struct device_node *panel_node; |
3e87599b RC |
27 | struct drm_panel *panel; |
28 | }; | |
29 | #define to_mdp4_lvds_connector(x) container_of(x, struct mdp4_lvds_connector, base) | |
30 | ||
31 | static enum drm_connector_status mdp4_lvds_connector_detect( | |
32 | struct drm_connector *connector, bool force) | |
33 | { | |
34 | struct mdp4_lvds_connector *mdp4_lvds_connector = | |
35 | to_mdp4_lvds_connector(connector); | |
36 | ||
a6bf7f63 AT |
37 | if (!mdp4_lvds_connector->panel) |
38 | mdp4_lvds_connector->panel = | |
39 | of_drm_find_panel(mdp4_lvds_connector->panel_node); | |
40 | ||
3e87599b RC |
41 | return mdp4_lvds_connector->panel ? |
42 | connector_status_connected : | |
43 | connector_status_disconnected; | |
44 | } | |
45 | ||
46 | static void mdp4_lvds_connector_destroy(struct drm_connector *connector) | |
47 | { | |
48 | struct mdp4_lvds_connector *mdp4_lvds_connector = | |
49 | to_mdp4_lvds_connector(connector); | |
3e87599b | 50 | |
3e87599b RC |
51 | drm_connector_cleanup(connector); |
52 | ||
53 | kfree(mdp4_lvds_connector); | |
54 | } | |
55 | ||
56 | static int mdp4_lvds_connector_get_modes(struct drm_connector *connector) | |
57 | { | |
58 | struct mdp4_lvds_connector *mdp4_lvds_connector = | |
59 | to_mdp4_lvds_connector(connector); | |
60 | struct drm_panel *panel = mdp4_lvds_connector->panel; | |
61 | int ret = 0; | |
62 | ||
a6bf7f63 AT |
63 | if (panel) { |
64 | drm_panel_attach(panel, connector); | |
65 | ||
3e87599b RC |
66 | ret = panel->funcs->get_modes(panel); |
67 | ||
a6bf7f63 AT |
68 | drm_panel_detach(panel); |
69 | } | |
70 | ||
3e87599b RC |
71 | return ret; |
72 | } | |
73 | ||
74 | static int mdp4_lvds_connector_mode_valid(struct drm_connector *connector, | |
75 | struct drm_display_mode *mode) | |
76 | { | |
77 | struct mdp4_lvds_connector *mdp4_lvds_connector = | |
78 | to_mdp4_lvds_connector(connector); | |
79 | struct drm_encoder *encoder = mdp4_lvds_connector->encoder; | |
80 | long actual, requested; | |
81 | ||
82 | requested = 1000 * mode->clock; | |
83 | actual = mdp4_lcdc_round_pixclk(encoder, requested); | |
84 | ||
85 | DBG("requested=%ld, actual=%ld", requested, actual); | |
86 | ||
87 | if (actual != requested) | |
88 | return MODE_CLOCK_RANGE; | |
89 | ||
90 | return MODE_OK; | |
91 | } | |
92 | ||
93 | static struct drm_encoder * | |
94 | mdp4_lvds_connector_best_encoder(struct drm_connector *connector) | |
95 | { | |
96 | struct mdp4_lvds_connector *mdp4_lvds_connector = | |
97 | to_mdp4_lvds_connector(connector); | |
98 | return mdp4_lvds_connector->encoder; | |
99 | } | |
100 | ||
101 | static const struct drm_connector_funcs mdp4_lvds_connector_funcs = { | |
0b776d45 | 102 | .dpms = drm_atomic_helper_connector_dpms, |
3e87599b RC |
103 | .detect = mdp4_lvds_connector_detect, |
104 | .fill_modes = drm_helper_probe_single_connector_modes, | |
105 | .destroy = mdp4_lvds_connector_destroy, | |
e27c54ff RC |
106 | .reset = drm_atomic_helper_connector_reset, |
107 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, | |
108 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, | |
3e87599b RC |
109 | }; |
110 | ||
111 | static const struct drm_connector_helper_funcs mdp4_lvds_connector_helper_funcs = { | |
112 | .get_modes = mdp4_lvds_connector_get_modes, | |
113 | .mode_valid = mdp4_lvds_connector_mode_valid, | |
114 | .best_encoder = mdp4_lvds_connector_best_encoder, | |
115 | }; | |
116 | ||
117 | /* initialize connector */ | |
118 | struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev, | |
a6bf7f63 | 119 | struct device_node *panel_node, struct drm_encoder *encoder) |
3e87599b RC |
120 | { |
121 | struct drm_connector *connector = NULL; | |
122 | struct mdp4_lvds_connector *mdp4_lvds_connector; | |
3e87599b RC |
123 | |
124 | mdp4_lvds_connector = kzalloc(sizeof(*mdp4_lvds_connector), GFP_KERNEL); | |
8208ed93 AT |
125 | if (!mdp4_lvds_connector) |
126 | return ERR_PTR(-ENOMEM); | |
3e87599b RC |
127 | |
128 | mdp4_lvds_connector->encoder = encoder; | |
a6bf7f63 | 129 | mdp4_lvds_connector->panel_node = panel_node; |
3e87599b RC |
130 | |
131 | connector = &mdp4_lvds_connector->base; | |
132 | ||
133 | drm_connector_init(dev, connector, &mdp4_lvds_connector_funcs, | |
134 | DRM_MODE_CONNECTOR_LVDS); | |
135 | drm_connector_helper_add(connector, &mdp4_lvds_connector_helper_funcs); | |
136 | ||
137 | connector->polled = 0; | |
138 | ||
139 | connector->interlace_allowed = 0; | |
140 | connector->doublescan_allowed = 0; | |
141 | ||
3e87599b RC |
142 | drm_mode_connector_attach_encoder(connector, encoder); |
143 | ||
3e87599b | 144 | return connector; |
3e87599b | 145 | } |