2 * rcar_du_lvds.c -- R-Car Display Unit LVDS Encoder and Connector
4 * Copyright (C) 2013 Renesas Corporation
6 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
15 #include <drm/drm_crtc.h>
16 #include <drm/drm_crtc_helper.h>
18 #include "rcar_du_drv.h"
19 #include "rcar_du_kms.h"
20 #include "rcar_du_lvds.h"
22 struct rcar_du_lvds_connector {
23 struct rcar_du_connector connector;
25 const struct rcar_du_panel_data *panel;
28 #define to_rcar_lvds_connector(c) \
29 container_of(c, struct rcar_du_lvds_connector, connector.connector)
31 /* -----------------------------------------------------------------------------
35 static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
37 struct rcar_du_lvds_connector *lvdscon = to_rcar_lvds_connector(connector);
38 struct drm_display_mode *mode;
40 mode = drm_mode_create(connector->dev);
44 mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
45 mode->clock = lvdscon->panel->mode.clock;
46 mode->hdisplay = lvdscon->panel->mode.hdisplay;
47 mode->hsync_start = lvdscon->panel->mode.hsync_start;
48 mode->hsync_end = lvdscon->panel->mode.hsync_end;
49 mode->htotal = lvdscon->panel->mode.htotal;
50 mode->vdisplay = lvdscon->panel->mode.vdisplay;
51 mode->vsync_start = lvdscon->panel->mode.vsync_start;
52 mode->vsync_end = lvdscon->panel->mode.vsync_end;
53 mode->vtotal = lvdscon->panel->mode.vtotal;
54 mode->flags = lvdscon->panel->mode.flags;
56 drm_mode_set_name(mode);
57 drm_mode_probed_add(connector, mode);
62 static int rcar_du_lvds_connector_mode_valid(struct drm_connector *connector,
63 struct drm_display_mode *mode)
68 static const struct drm_connector_helper_funcs connector_helper_funcs = {
69 .get_modes = rcar_du_lvds_connector_get_modes,
70 .mode_valid = rcar_du_lvds_connector_mode_valid,
71 .best_encoder = rcar_du_connector_best_encoder,
74 static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
76 drm_sysfs_connector_remove(connector);
77 drm_connector_cleanup(connector);
80 static enum drm_connector_status
81 rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
83 return connector_status_connected;
86 static const struct drm_connector_funcs connector_funcs = {
87 .dpms = drm_helper_connector_dpms,
88 .detect = rcar_du_lvds_connector_detect,
89 .fill_modes = drm_helper_probe_single_connector_modes,
90 .destroy = rcar_du_lvds_connector_destroy,
93 static int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
94 struct rcar_du_encoder *renc,
95 const struct rcar_du_panel_data *panel)
97 struct rcar_du_lvds_connector *lvdscon;
98 struct drm_connector *connector;
101 lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
105 lvdscon->panel = panel;
107 connector = &lvdscon->connector.connector;
108 connector->display_info.width_mm = panel->width_mm;
109 connector->display_info.height_mm = panel->height_mm;
111 ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
112 DRM_MODE_CONNECTOR_LVDS);
116 drm_connector_helper_add(connector, &connector_helper_funcs);
117 ret = drm_sysfs_connector_add(connector);
121 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
122 drm_object_property_set_value(&connector->base,
123 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
125 ret = drm_mode_connector_attach_encoder(connector, &renc->encoder);
129 connector->encoder = &renc->encoder;
130 lvdscon->connector.encoder = renc;
135 /* -----------------------------------------------------------------------------
139 static void rcar_du_lvds_encoder_dpms(struct drm_encoder *encoder, int mode)
143 static bool rcar_du_lvds_encoder_mode_fixup(struct drm_encoder *encoder,
144 const struct drm_display_mode *mode,
145 struct drm_display_mode *adjusted_mode)
147 const struct drm_display_mode *panel_mode;
148 struct drm_device *dev = encoder->dev;
149 struct drm_connector *connector;
152 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
153 if (connector->encoder == encoder) {
160 dev_dbg(dev->dev, "mode_fixup: no connector found\n");
164 if (list_empty(&connector->modes)) {
165 dev_dbg(dev->dev, "mode_fixup: empty modes list\n");
169 panel_mode = list_first_entry(&connector->modes,
170 struct drm_display_mode, head);
172 /* We're not allowed to modify the resolution. */
173 if (mode->hdisplay != panel_mode->hdisplay ||
174 mode->vdisplay != panel_mode->vdisplay)
177 /* The flat panel mode is fixed, just copy it to the adjusted mode. */
178 drm_mode_copy(adjusted_mode, panel_mode);
183 static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
184 .dpms = rcar_du_lvds_encoder_dpms,
185 .mode_fixup = rcar_du_lvds_encoder_mode_fixup,
186 .prepare = rcar_du_encoder_mode_prepare,
187 .commit = rcar_du_encoder_mode_commit,
188 .mode_set = rcar_du_encoder_mode_set,
191 static const struct drm_encoder_funcs encoder_funcs = {
192 .destroy = drm_encoder_cleanup,
195 int rcar_du_lvds_init(struct rcar_du_device *rcdu,
196 const struct rcar_du_encoder_lvds_data *data,
199 struct rcar_du_encoder *renc;
202 renc = devm_kzalloc(rcdu->dev, sizeof(*renc), GFP_KERNEL);
206 renc->output = output;
208 ret = drm_encoder_init(rcdu->ddev, &renc->encoder, &encoder_funcs,
209 DRM_MODE_ENCODER_LVDS);
213 drm_encoder_helper_add(&renc->encoder, &encoder_helper_funcs);
215 return rcar_du_lvds_connector_init(rcdu, renc, &data->panel);