drivers/gpu/drm/mxsfb/mxsfb_out.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (C) 2016 Marek Vasut <marex@denx.de>
   4  */
   5
   6 #include <linux/of_graph.h>
   7
   8 #include <drm/drm_atomic.h>
   9 #include <drm/drm_atomic_helper.h>
  10 #include <drm/drm_crtc.h>
  11 #include <drm/drm_fb_cma_helper.h>
  12 #include <drm/drm_gem_cma_helper.h>
  13 #include <drm/drm_of.h>
  14 #include <drm/drm_panel.h>
  15 #include <drm/drm_plane_helper.h>
  16 #include <drm/drm_probe_helper.h>
  17 #include <drm/drm_simple_kms_helper.h>
  18
  19 #include "mxsfb_drv.h"
  20
  21 static struct mxsfb_drm_private *
  22 drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
  23 {
  24         return container_of(connector, struct mxsfb_drm_private,
  25                             panel_connector);
  26 }
  27
  28 static int mxsfb_panel_get_modes(struct drm_connector *connector)
  29 {
  30         struct mxsfb_drm_private *mxsfb =
  31                         drm_connector_to_mxsfb_drm_private(connector);
  32
  33         if (mxsfb->panel)
  34                 return drm_panel_get_modes(mxsfb->panel, connector);
  35
  36         return 0;
  37 }
  38
  39 static const struct
  40 drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
  41         .get_modes = mxsfb_panel_get_modes,
  42 };
  43
  44 static enum drm_connector_status
  45 mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
  46 {
  47         struct mxsfb_drm_private *mxsfb =
  48                         drm_connector_to_mxsfb_drm_private(connector);
  49
  50         if (mxsfb->panel)
  51                 return connector_status_connected;
  52
  53         return connector_status_disconnected;
  54 }
  55
  56 static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
  57 {
  58         struct mxsfb_drm_private *mxsfb =
  59                         drm_connector_to_mxsfb_drm_private(connector);
  60
  61         if (mxsfb->panel)
  62                 drm_panel_detach(mxsfb->panel);
  63
  64         drm_connector_unregister(connector);
  65         drm_connector_cleanup(connector);
  66 }
  67
  68 static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
  69         .detect                 = mxsfb_panel_connector_detect,
  70         .fill_modes             = drm_helper_probe_single_connector_modes,
  71         .destroy                = mxsfb_panel_connector_destroy,
  72         .reset                  = drm_atomic_helper_connector_reset,
  73         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  74         .atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
  75 };
  76
  77 int mxsfb_create_output(struct drm_device *drm)
  78 {
  79         struct mxsfb_drm_private *mxsfb = drm->dev_private;
  80         int ret;
  81
  82         ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0,
  83                                           &mxsfb->panel, &mxsfb->bridge);
  84         if (ret)
  85                 return ret;
  86
  87         if (mxsfb->panel) {
  88                 mxsfb->connector = &mxsfb->panel_connector;
  89                 mxsfb->connector->dpms = DRM_MODE_DPMS_OFF;
  90                 mxsfb->connector->polled = 0;
  91                 drm_connector_helper_add(mxsfb->connector,
  92                                          &mxsfb_panel_connector_helper_funcs);
  93                 ret = drm_connector_init(drm, mxsfb->connector,
  94                                          &mxsfb_panel_connector_funcs,
  95                                          DRM_MODE_CONNECTOR_Unknown);
  96         }
  97
  98         return ret;
  99 }