drivers/gpu/drm/vkms/vkms_output.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  */
   8
   9 #include "vkms_drv.h"
  10 #include <drm/drm_crtc_helper.h>
  11 #include <drm/drm_atomic_helper.h>
  12
  13 static void vkms_connector_destroy(struct drm_connector *connector)
  14 {
  15         drm_connector_unregister(connector);
  16         drm_connector_cleanup(connector);
  17 }
  18
  19 static const struct drm_connector_funcs vkms_connector_funcs = {
  20         .fill_modes = drm_helper_probe_single_connector_modes,
  21         .destroy = vkms_connector_destroy,
  22         .reset = drm_atomic_helper_connector_reset,
  23         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  24         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  25 };
  26
  27 static const struct drm_encoder_funcs vkms_encoder_funcs = {
  28         .destroy = drm_encoder_cleanup,
  29 };
  30
  31 static int vkms_conn_get_modes(struct drm_connector *connector)
  32 {
  33         int count;
  34
  35         count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
  36         drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
  37
  38         return count;
  39 }
  40
  41 static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
  42         .get_modes    = vkms_conn_get_modes,
  43 };
  44
  45 int vkms_output_init(struct vkms_device *vkmsdev)
  46 {
  47         struct vkms_output *output = &vkmsdev->output;
  48         struct drm_device *dev = &vkmsdev->drm;
  49         struct drm_connector *connector = &output->connector;
  50         struct drm_encoder *encoder = &output->encoder;
  51         struct drm_crtc *crtc = &output->crtc;
  52         struct drm_plane *primary, *cursor = NULL;
  53         int ret;
  54
  55         primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY);
  56         if (IS_ERR(primary))
  57                 return PTR_ERR(primary);
  58
  59         if (enable_cursor) {
  60                 cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR);
  61                 if (IS_ERR(cursor)) {
  62                         ret = PTR_ERR(cursor);
  63                         goto err_cursor;
  64                 }
  65         }
  66
  67         ret = vkms_crtc_init(dev, crtc, primary, cursor);
  68         if (ret)
  69                 goto err_crtc;
  70
  71         ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
  72                                  DRM_MODE_CONNECTOR_VIRTUAL);
  73         if (ret) {
  74                 DRM_ERROR("Failed to init connector\n");
  75                 goto err_connector;
  76         }
  77
  78         drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
  79
  80         ret = drm_connector_register(connector);
  81         if (ret) {
  82                 DRM_ERROR("Failed to register connector\n");
  83                 goto err_connector_register;
  84         }
  85
  86         ret = drm_encoder_init(dev, encoder, &vkms_encoder_funcs,
  87                                DRM_MODE_ENCODER_VIRTUAL, NULL);
  88         if (ret) {
  89                 DRM_ERROR("Failed to init encoder\n");
  90                 goto err_encoder;
  91         }
  92         encoder->possible_crtcs = 1;
  93
  94         ret = drm_connector_attach_encoder(connector, encoder);
  95         if (ret) {
  96                 DRM_ERROR("Failed to attach connector to encoder\n");
  97                 goto err_attach;
  98         }
  99
 100         drm_mode_config_reset(dev);
 101
 102         return 0;
 103
 104 err_attach:
 105         drm_encoder_cleanup(encoder);
 106
 107 err_encoder:
 108         drm_connector_unregister(connector);
 109
 110 err_connector_register:
 111         drm_connector_cleanup(connector);
 112
 113 err_connector:
 114         drm_crtc_cleanup(crtc);
 115
 116 err_crtc:
 117         if (enable_cursor)
 118                 drm_plane_cleanup(cursor);
 119
 120 err_cursor:
 121         drm_plane_cleanup(primary);
 122
 123         return ret;
 124 }