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, connector);
  25 }
  26
  27 static int mxsfb_panel_get_modes(struct drm_connector *connector)
  28 {
  29         struct mxsfb_drm_private *mxsfb =
  30                         drm_connector_to_mxsfb_drm_private(connector);
  31
  32         if (mxsfb->panel)
  33                 return mxsfb->panel->funcs->get_modes(mxsfb->panel);
  34
  35         return 0;
  36 }
  37
  38 static const struct
  39 drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
  40         .get_modes = mxsfb_panel_get_modes,
  41 };
  42
  43 static enum drm_connector_status
  44 mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
  45 {
  46         struct mxsfb_drm_private *mxsfb =
  47                         drm_connector_to_mxsfb_drm_private(connector);
  48
  49         if (mxsfb->panel)
  50                 return connector_status_connected;
  51
  52         return connector_status_disconnected;
  53 }
  54
  55 static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
  56 {
  57         struct mxsfb_drm_private *mxsfb =
  58                         drm_connector_to_mxsfb_drm_private(connector);
  59
  60         if (mxsfb->panel)
  61                 drm_panel_detach(mxsfb->panel);
  62
  63         drm_connector_unregister(connector);
  64         drm_connector_cleanup(connector);
  65 }
  66
  67 static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
  68         .detect                 = mxsfb_panel_connector_detect,
  69         .fill_modes             = drm_helper_probe_single_connector_modes,
  70         .destroy                = mxsfb_panel_connector_destroy,
  71         .reset                  = drm_atomic_helper_connector_reset,
  72         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  73         .atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
  74 };
  75
  76 int mxsfb_create_output(struct drm_device *drm)
  77 {
  78         struct mxsfb_drm_private *mxsfb = drm->dev_private;
  79         struct drm_panel *panel;
  80         int ret;
  81
  82         ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel, NULL);
  83         if (ret)
  84                 return ret;
  85
  86         mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
  87         mxsfb->connector.polled = 0;
  88         drm_connector_helper_add(&mxsfb->connector,
  89                         &mxsfb_panel_connector_helper_funcs);
  90         ret = drm_connector_init(drm, &mxsfb->connector,
  91                                  &mxsfb_panel_connector_funcs,
  92                                  DRM_MODE_CONNECTOR_Unknown);
  93         if (!ret)
  94                 mxsfb->panel = panel;
  95
  96         return ret;
  97 }