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 <video/display_timing.h>
  19 #include <video/of_display_timing.h>
  20 #include <video/videomode.h>
  21
  22 #include "rcar_du_drv.h"
  23 #include "rcar_du_encoder.h"
  24 #include "rcar_du_kms.h"
  25 #include "rcar_du_lvdscon.h"
  26
  27 struct rcar_du_lvds_connector {
  28         struct rcar_du_connector connector;
  29
  30         struct {
  31                 unsigned int width_mm;          /* Panel width in mm */
  32                 unsigned int height_mm;         /* Panel height in mm */
  33                 struct videomode mode;
  34         } panel;
  35 };
  36
  37 #define to_rcar_lvds_connector(c) \
  38         container_of(c, struct rcar_du_lvds_connector, connector.connector)
  39
  40 static int rcar_du_lvds_connector_get_modes(struct drm_connector *connector)
  41 {
  42         struct rcar_du_lvds_connector *lvdscon =
  43                 to_rcar_lvds_connector(connector);
  44         struct drm_display_mode *mode;
  45
  46         mode = drm_mode_create(connector->dev);
  47         if (mode == NULL)
  48                 return 0;
  49
  50         mode->type = DRM_MODE_TYPE_PREFERRED | DRM_MODE_TYPE_DRIVER;
  51
  52         drm_display_mode_from_videomode(&lvdscon->panel.mode, mode);
  53
  54         drm_mode_probed_add(connector, mode);
  55
  56         return 1;
  57 }
  58
  59 static int rcar_du_lvds_connector_mode_valid(struct drm_connector *connector,
  60                                             struct drm_display_mode *mode)
  61 {
  62         return MODE_OK;
  63 }
  64
  65 static const struct drm_connector_helper_funcs connector_helper_funcs = {
  66         .get_modes = rcar_du_lvds_connector_get_modes,
  67         .mode_valid = rcar_du_lvds_connector_mode_valid,
  68         .best_encoder = rcar_du_connector_best_encoder,
  69 };
  70
  71 static void rcar_du_lvds_connector_destroy(struct drm_connector *connector)
  72 {
  73         drm_connector_unregister(connector);
  74         drm_connector_cleanup(connector);
  75 }
  76
  77 static enum drm_connector_status
  78 rcar_du_lvds_connector_detect(struct drm_connector *connector, bool force)
  79 {
  80         return connector_status_connected;
  81 }
  82
  83 static const struct drm_connector_funcs connector_funcs = {
  84         .dpms = drm_helper_connector_dpms,
  85         .detect = rcar_du_lvds_connector_detect,
  86         .fill_modes = drm_helper_probe_single_connector_modes,
  87         .destroy = rcar_du_lvds_connector_destroy,
  88 };
  89
  90 int rcar_du_lvds_connector_init(struct rcar_du_device *rcdu,
  91                                 struct rcar_du_encoder *renc,
  92                                 /* TODO const */ struct device_node *np)
  93 {
  94         struct drm_encoder *encoder = rcar_encoder_to_drm_encoder(renc);
  95         struct rcar_du_lvds_connector *lvdscon;
  96         struct drm_connector *connector;
  97         struct display_timing timing;
  98         int ret;
  99
 100         lvdscon = devm_kzalloc(rcdu->dev, sizeof(*lvdscon), GFP_KERNEL);
 101         if (lvdscon == NULL)
 102                 return -ENOMEM;
 103
 104         ret = of_get_display_timing(np, "panel-timing", &timing);
 105         if (ret < 0)
 106                 return ret;
 107
 108         videomode_from_timing(&timing, &lvdscon->panel.mode);
 109
 110         of_property_read_u32(np, "width-mm", &lvdscon->panel.width_mm);
 111         of_property_read_u32(np, "height-mm", &lvdscon->panel.height_mm);
 112
 113         connector = &lvdscon->connector.connector;
 114         connector->display_info.width_mm = lvdscon->panel.width_mm;
 115         connector->display_info.height_mm = lvdscon->panel.height_mm;
 116
 117         ret = drm_connector_init(rcdu->ddev, connector, &connector_funcs,
 118                                  DRM_MODE_CONNECTOR_LVDS);
 119         if (ret < 0)
 120                 return ret;
 121
 122         drm_connector_helper_add(connector, &connector_helper_funcs);
 123         ret = drm_connector_register(connector);
 124         if (ret < 0)
 125                 return ret;
 126
 127         drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 128         drm_object_property_set_value(&connector->base,
 129                 rcdu->ddev->mode_config.dpms_property, DRM_MODE_DPMS_OFF);
 130
 131         ret = drm_mode_connector_attach_encoder(connector, encoder);
 132         if (ret < 0)
 133                 return ret;
 134
 135         connector->encoder = encoder;
 136         lvdscon->connector.encoder = renc;
 137
 138         return 0;
 139 }