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8#include <linux/gpio.h>
9
10#include "mdp4_kms.h"
11
12struct mdp4_lvds_connector {
13 struct drm_connector base;
14 struct drm_encoder *encoder;
15 struct device_node *panel_node;
16 struct drm_panel *panel;
17};
18#define to_mdp4_lvds_connector(x) container_of(x, struct mdp4_lvds_connector, base)
19
20static enum drm_connector_status mdp4_lvds_connector_detect(
21 struct drm_connector *connector, bool force)
22{
23 struct mdp4_lvds_connector *mdp4_lvds_connector =
24 to_mdp4_lvds_connector(connector);
25
26 if (!mdp4_lvds_connector->panel) {
27 mdp4_lvds_connector->panel =
28 of_drm_find_panel(mdp4_lvds_connector->panel_node);
29 if (IS_ERR(mdp4_lvds_connector->panel))
30 mdp4_lvds_connector->panel = NULL;
31 }
32
33 return mdp4_lvds_connector->panel ?
34 connector_status_connected :
35 connector_status_disconnected;
36}
37
38static void mdp4_lvds_connector_destroy(struct drm_connector *connector)
39{
40 struct mdp4_lvds_connector *mdp4_lvds_connector =
41 to_mdp4_lvds_connector(connector);
42
43 drm_connector_cleanup(connector);
44
45 kfree(mdp4_lvds_connector);
46}
47
48static int mdp4_lvds_connector_get_modes(struct drm_connector *connector)
49{
50 struct mdp4_lvds_connector *mdp4_lvds_connector =
51 to_mdp4_lvds_connector(connector);
52 struct drm_panel *panel = mdp4_lvds_connector->panel;
53 int ret = 0;
54
55 if (panel) {
56 drm_panel_attach(panel, connector);
57
58 ret = panel->funcs->get_modes(panel);
59
60 drm_panel_detach(panel);
61 }
62
63 return ret;
64}
65
66static int mdp4_lvds_connector_mode_valid(struct drm_connector *connector,
67 struct drm_display_mode *mode)
68{
69 struct mdp4_lvds_connector *mdp4_lvds_connector =
70 to_mdp4_lvds_connector(connector);
71 struct drm_encoder *encoder = mdp4_lvds_connector->encoder;
72 long actual, requested;
73
74 requested = 1000 * mode->clock;
75 actual = mdp4_lcdc_round_pixclk(encoder, requested);
76
77 DBG("requested=%ld, actual=%ld", requested, actual);
78
79 if (actual != requested)
80 return MODE_CLOCK_RANGE;
81
82 return MODE_OK;
83}
84
85static const struct drm_connector_funcs mdp4_lvds_connector_funcs = {
86 .detect = mdp4_lvds_connector_detect,
87 .fill_modes = drm_helper_probe_single_connector_modes,
88 .destroy = mdp4_lvds_connector_destroy,
89 .reset = drm_atomic_helper_connector_reset,
90 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
91 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
92};
93
94static const struct drm_connector_helper_funcs mdp4_lvds_connector_helper_funcs = {
95 .get_modes = mdp4_lvds_connector_get_modes,
96 .mode_valid = mdp4_lvds_connector_mode_valid,
97};
98
99
100struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev,
101 struct device_node *panel_node, struct drm_encoder *encoder)
102{
103 struct drm_connector *connector = NULL;
104 struct mdp4_lvds_connector *mdp4_lvds_connector;
105
106 mdp4_lvds_connector = kzalloc(sizeof(*mdp4_lvds_connector), GFP_KERNEL);
107 if (!mdp4_lvds_connector)
108 return ERR_PTR(-ENOMEM);
109
110 mdp4_lvds_connector->encoder = encoder;
111 mdp4_lvds_connector->panel_node = panel_node;
112
113 connector = &mdp4_lvds_connector->base;
114
115 drm_connector_init(dev, connector, &mdp4_lvds_connector_funcs,
116 DRM_MODE_CONNECTOR_LVDS);
117 drm_connector_helper_add(connector, &mdp4_lvds_connector_helper_funcs);
118
119 connector->polled = 0;
120
121 connector->interlace_allowed = 0;
122 connector->doublescan_allowed = 0;
123
124 drm_connector_attach_encoder(connector, encoder);
125
126 return connector;
127}
128
