drivers/gpu/drm/vkms/vkms_output.c

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