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 Renesas 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         mode->clock = lvdscon->panel->mode.clock;
  44         mode->hdisplay = lvdscon->panel->mode.hdisplay;
  45         mode->hsync_start = lvdscon->panel->mode.hsync_start;
  46         mode->hsync_end = lvdscon->panel->mode.hsync_end;
  47         mode->htotal = lvdscon->panel->mode.htotal;
  48         mode->vdisplay = lvdscon->panel->mode.vdisplay;
  49         mode->vsync_start = lvdscon->panel->mode.vsync_start;
  50         mode->vsync_end = lvdscon->panel->mode.vsync_end;
  51         mode->vtotal = lvdscon->panel->mode.vtotal;
  52         mode->flags = lvdscon->panel->mode.flags;
  53
  54         drm_mode_set_name(mode);
  55         drm_mode_probed_add(connector, mode);
  56
  57         return 1;
  58 }
  59
  60 static int rcar_du_lvds_connector_mode_valid(struct drm_connector *connector,
  61                                             struct drm_display_mode *mode)
  62 {
  63         return MODE_OK;
  64 }
  65
  66 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  67         .get_modes = rcar_du_lvds_connector_get_modes,
  68         .mode_valid = rcar_du_lvds_connector_mode_valid,
  69         .best_encoder = rcar_du_connector_best_encoder,
  70 };
  71
  72 static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
  73 {
  74         drm_sysfs_connector_remove(connector);
  75         drm_connector_cleanup(connector);
  76 }
  77
  78 static enum drm_connector_status
  79 rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
  80 {
  81         return connector_status_connected;
  82 }
  83
  84 static const struct drm_connector_funcs connector_funcs = {
  85         .dpms = drm_helper_connector_dpms,
  86         .detect = rcar_du_lvds_connector_detect,
  87         .fill_modes = drm_helper_probe_single_connector_modes,
  88         .destroy = rcar_du_lvds_connector_destroy,
  89 };
  90
  91 int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
  92                                 struct rcar_du_encoder *renc,
  93                                 const struct rcar_du_panel_data *panel)
  94 {
  95         struct rcar_du_lvds_connector *lvdscon;
  96         struct drm_connector *connector;
  97         int ret;
  98
  99         lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
 100         if (lvdscon == NULL)
 101                 return -ENOMEM;
 102
 103         lvdscon->panel = panel;
 104
 105         connector = &lvdscon->connector.connector;
 106         connector->display_info.width_mm = panel->width_mm;
 107         connector->display_info.height_mm = panel->height_mm;
 108
 109         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 110                                  DRM_MODE_CONNECTOR_LVDS);
 111         if (ret < 0)
 112                 return ret;
 113
 114         drm_connector_helper_add(connector, &connector_helper_funcs);
 115         ret = drm_sysfs_connector_add(connector);
 116         if (ret < 0)
 117                 return ret;
 118
 119         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 120         drm_object_property_set_value(&connector->base,
 121                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 122
 123         ret = drm_mode_connector_attach_encoder(connector, &renc->encoder);
 124         if (ret < 0)
 125                 return ret;
 126
 127         connector->encoder = &renc->encoder;
 128         lvdscon->connector.encoder = renc;
 129
 130         return 0;
 131 }