drivers/gpu/drm/rcar-du/rcar_du_lvdscon.c

   1 /*
   2  * rcar_du_lvdscon.c  --  R-Car Display Unit LVDS Connector
   3  *
   4  * Copyright (C) 2013-2014 Renesas Electronics Corporation
   5  *
   6  * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
   7  *
   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.
  12  */
  13
  14 #include <drm/drmP.h>
  15 #include <drm/drm_crtc.h>
  16 #include <drm/drm_crtc_helper.h>
  17
  18 #include "rcar_du_drv.h"
  19 #include "rcar_du_encoder.h"
  20 #include "rcar_du_kms.h"
  21 #include "rcar_du_lvdscon.h"
  22
  23 struct rcar_du_lvds_connector {
  24         struct rcar_du_connector connector;
  25
  26         const struct rcar_du_panel_data *panel;
  27 };
  28
  29 #define to_rcar_lvds_connector(c) \
  30         container_of(c, struct rcar_du_lvds_connector, connector.connector)
  31
  32 static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
  33 {
  34         struct rcar_du_lvds_connector *lvdscon =
  35                 to_rcar_lvds_connector(connector);
  36         struct drm_display_mode *mode;
  37
  38         mode = drm_mode_create(connector->dev);
  39         if (mode == NULL)
  40                 return 0;
  41
  42         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
  43
  44         drm_display_mode_from_videomode(&lvdscon->panel->mode, mode);
  45
  46         drm_mode_probed_add(connector, mode);
  47
  48         return 1;
  49 }
  50
  51 static int rcar_du_lvds_connector_mode_valid(struct drm_connector *connector,
  52                                             struct drm_display_mode *mode)
  53 {
  54         return MODE_OK;
  55 }
  56
  57 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  58         .get_modes = rcar_du_lvds_connector_get_modes,
  59         .mode_valid = rcar_du_lvds_connector_mode_valid,
  60         .best_encoder = rcar_du_connector_best_encoder,
  61 };
  62
  63 static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
  64 {
  65         drm_sysfs_connector_remove(connector);
  66         drm_connector_cleanup(connector);
  67 }
  68
  69 static enum drm_connector_status
  70 rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
  71 {
  72         return connector_status_connected;
  73 }
  74
  75 static const struct drm_connector_funcs connector_funcs = {
  76         .dpms = drm_helper_connector_dpms,
  77         .detect = rcar_du_lvds_connector_detect,
  78         .fill_modes = drm_helper_probe_single_connector_modes,
  79         .destroy = rcar_du_lvds_connector_destroy,
  80 };
  81
  82 int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
  83                                 struct rcar_du_encoder *renc,
  84                                 const struct rcar_du_panel_data *panel)
  85 {
  86         struct rcar_du_lvds_connector *lvdscon;
  87         struct drm_connector *connector;
  88         int ret;
  89
  90         lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
  91         if (lvdscon == NULL)
  92                 return -ENOMEM;
  93
  94         lvdscon->panel = panel;
  95
  96         connector = &lvdscon->connector.connector;
  97         connector->display_info.width_mm = panel->width_mm;
  98         connector->display_info.height_mm = panel->height_mm;
  99
 100         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 101                                  DRM_MODE_CONNECTOR_LVDS);
 102         if (ret < 0)
 103                 return ret;
 104
 105         drm_connector_helper_add(connector, &connector_helper_funcs);
 106         ret = drm_sysfs_connector_add(connector);
 107         if (ret < 0)
 108                 return ret;
 109
 110         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 111         drm_object_property_set_value(&connector->base,
 112                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 113
 114         ret = drm_mode_connector_attach_encoder(connector, &renc->encoder);
 115         if (ret < 0)
 116                 return ret;
 117
 118         connector->encoder = &renc->encoder;
 119         lvdscon->connector.encoder = renc;
 120
 121         return 0;
 122 }