LXR linux/drivers/gpu/drm/mxsfb/mxsfb

   1/*
   2 * Copyright (C) 2016 Marek Vasut <marex@denx.de>
   3 *
   4 * This program is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU General Public License
   6 * as published by the Free Software Foundation; either version 2
   7 * of the License, or (at your option) any later version.
   8 * This program is distributed in the hope that it will be useful,
   9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 * GNU General Public License for more details.
  12 */
  13
  14#include <linux/of_graph.h>
  15
  16#include <drm/drm_atomic.h>
  17#include <drm/drm_atomic_helper.h>
  18#include <drm/drm_crtc.h>
  19#include <drm/drm_crtc_helper.h>
  20#include <drm/drm_fb_cma_helper.h>
  21#include <drm/drm_gem_cma_helper.h>
  22#include <drm/drm_of.h>
  23#include <drm/drm_panel.h>
  24#include <drm/drm_plane_helper.h>
  25#include <drm/drm_simple_kms_helper.h>
  26#include <drm/drmP.h>
  27
  28#include "mxsfb_drv.h"
  29
  30static struct mxsfb_drm_private *
  31drm_connector_to_mxsfb_drm_private(struct drm_connector *connector)
  32{
  33        return container_of(connector, struct mxsfb_drm_private, connector);
  34}
  35
  36static int mxsfb_panel_get_modes(struct drm_connector *connector)
  37{
  38        struct mxsfb_drm_private *mxsfb =
  39                        drm_connector_to_mxsfb_drm_private(connector);
  40
  41        if (mxsfb->panel)
  42                return mxsfb->panel->funcs->get_modes(mxsfb->panel);
  43
  44        return 0;
  45}
  46
  47static const struct
  48drm_connector_helper_funcs mxsfb_panel_connector_helper_funcs = {
  49        .get_modes = mxsfb_panel_get_modes,
  50};
  51
  52static enum drm_connector_status
  53mxsfb_panel_connector_detect(struct drm_connector *connector, bool force)
  54{
  55        struct mxsfb_drm_private *mxsfb =
  56                        drm_connector_to_mxsfb_drm_private(connector);
  57
  58        if (mxsfb->panel)
  59                return connector_status_connected;
  60
  61        return connector_status_disconnected;
  62}
  63
  64static void mxsfb_panel_connector_destroy(struct drm_connector *connector)
  65{
  66        struct mxsfb_drm_private *mxsfb =
  67                        drm_connector_to_mxsfb_drm_private(connector);
  68
  69        if (mxsfb->panel)
  70                drm_panel_detach(mxsfb->panel);
  71
  72        drm_connector_unregister(connector);
  73        drm_connector_cleanup(connector);
  74}
  75
  76static const struct drm_connector_funcs mxsfb_panel_connector_funcs = {
  77        .detect                 = mxsfb_panel_connector_detect,
  78        .fill_modes             = drm_helper_probe_single_connector_modes,
  79        .destroy                = mxsfb_panel_connector_destroy,
  80        .reset                  = drm_atomic_helper_connector_reset,
  81        .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  82        .atomic_destroy_state   = drm_atomic_helper_connector_destroy_state,
  83};
  84
  85int mxsfb_create_output(struct drm_device *drm)
  86{
  87        struct mxsfb_drm_private *mxsfb = drm->dev_private;
  88        struct drm_panel *panel;
  89        int ret;
  90
  91        ret = drm_of_find_panel_or_bridge(drm->dev->of_node, 0, 0, &panel, NULL);
  92        if (ret)
  93                return ret;
  94
  95        mxsfb->connector.dpms = DRM_MODE_DPMS_OFF;
  96        mxsfb->connector.polled = 0;
  97        drm_connector_helper_add(&mxsfb->connector,
  98                        &mxsfb_panel_connector_helper_funcs);
  99        ret = drm_connector_init(drm, &mxsfb->connector,
 100                                 &mxsfb_panel_connector_funcs,
 101                                 DRM_MODE_CONNECTOR_Unknown);
 102        if (!ret)
 103                mxsfb->panel = panel;
 104
 105        return ret;
 106}
 107