2 * Copyright (C) 2014 Red Hat
3 * Author: Rob Clark <robdclark@gmail.com>
4 * Author: Vinay Simha <vinaysimha@inforcecomputing.com>
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.
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
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/>.
19 #include <linux/gpio.h>
23 struct mdp4_lvds_connector {
24 struct drm_connector base;
25 struct drm_encoder *encoder;
26 struct device_node *panel_node;
27 struct drm_panel *panel;
29 #define to_mdp4_lvds_connector(x) container_of(x, struct mdp4_lvds_connector, base)
31 static enum drm_connector_status mdp4_lvds_connector_detect(
32 struct drm_connector *connector, bool force)
34 struct mdp4_lvds_connector *mdp4_lvds_connector =
35 to_mdp4_lvds_connector(connector);
37 if (!mdp4_lvds_connector->panel)
38 mdp4_lvds_connector->panel =
39 of_drm_find_panel(mdp4_lvds_connector->panel_node);
41 return mdp4_lvds_connector->panel ?
42 connector_status_connected :
43 connector_status_disconnected;
46 static void mdp4_lvds_connector_destroy(struct drm_connector *connector)
48 struct mdp4_lvds_connector *mdp4_lvds_connector =
49 to_mdp4_lvds_connector(connector);
51 drm_connector_cleanup(connector);
53 kfree(mdp4_lvds_connector);
56 static int mdp4_lvds_connector_get_modes(struct drm_connector *connector)
58 struct mdp4_lvds_connector *mdp4_lvds_connector =
59 to_mdp4_lvds_connector(connector);
60 struct drm_panel *panel = mdp4_lvds_connector->panel;
64 drm_panel_attach(panel, connector);
66 ret = panel->funcs->get_modes(panel);
68 drm_panel_detach(panel);
74 static int mdp4_lvds_connector_mode_valid(struct drm_connector *connector,
75 struct drm_display_mode *mode)
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;
82 requested = 1000 * mode->clock;
83 actual = mdp4_lcdc_round_pixclk(encoder, requested);
85 DBG("requested=%ld, actual=%ld", requested, actual);
87 if (actual != requested)
88 return MODE_CLOCK_RANGE;
93 static const struct drm_connector_funcs mdp4_lvds_connector_funcs = {
94 .dpms = drm_atomic_helper_connector_dpms,
95 .detect = mdp4_lvds_connector_detect,
96 .fill_modes = drm_helper_probe_single_connector_modes,
97 .destroy = mdp4_lvds_connector_destroy,
98 .reset = drm_atomic_helper_connector_reset,
99 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
100 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
103 static const struct drm_connector_helper_funcs mdp4_lvds_connector_helper_funcs = {
104 .get_modes = mdp4_lvds_connector_get_modes,
105 .mode_valid = mdp4_lvds_connector_mode_valid,
108 /* initialize connector */
109 struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev,
110 struct device_node *panel_node, struct drm_encoder *encoder)
112 struct drm_connector *connector = NULL;
113 struct mdp4_lvds_connector *mdp4_lvds_connector;
115 mdp4_lvds_connector = kzalloc(sizeof(*mdp4_lvds_connector), GFP_KERNEL);
116 if (!mdp4_lvds_connector)
117 return ERR_PTR(-ENOMEM);
119 mdp4_lvds_connector->encoder = encoder;
120 mdp4_lvds_connector->panel_node = panel_node;
122 connector = &mdp4_lvds_connector->base;
124 drm_connector_init(dev, connector, &mdp4_lvds_connector_funcs,
125 DRM_MODE_CONNECTOR_LVDS);
126 drm_connector_helper_add(connector, &mdp4_lvds_connector_helper_funcs);
128 connector->polled = 0;
130 connector->interlace_allowed = 0;
131 connector->doublescan_allowed = 0;
133 drm_mode_connector_attach_encoder(connector, encoder);