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 #include <drm/drm_simple_kms_helper.h>
   7
   8 static void vkms_connector_destroy(struct drm_connector *connector)
   9 {
  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 int vkms_conn_get_modes(struct drm_connector *connector)
  22 {
  23         int count;
  24
  25         count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
  26         drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
  27
  28         return count;
  29 }
  30
  31 static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
  32         .get_modes    = vkms_conn_get_modes,
  33 };
  34
  35 int vkms_output_init(struct vkms_device *vkmsdev, int index)
  36 {
  37         struct vkms_output *output = &vkmsdev->output;
  38         struct drm_device *dev = &vkmsdev->drm;
  39         struct drm_connector *connector = &output->connector;
  40         struct drm_encoder *encoder = &output->encoder;
  41         struct drm_crtc *crtc = &output->crtc;
  42         struct drm_plane *primary, *cursor = NULL;
  43         int ret;
  44         int writeback;
  45
  46         primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
  47         if (IS_ERR(primary))
  48                 return PTR_ERR(primary);
  49
  50         if (vkmsdev->config->cursor) {
  51                 cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
  52                 if (IS_ERR(cursor)) {
  53                         ret = PTR_ERR(cursor);
  54                         goto err_cursor;
  55                 }
  56         }
  57
  58         ret = vkms_crtc_init(dev, crtc, primary, cursor);
  59         if (ret)
  60                 goto err_crtc;
  61
  62         ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
  63                                  DRM_MODE_CONNECTOR_VIRTUAL);
  64         if (ret) {
  65                 DRM_ERROR("Failed to init connector\n");
  66                 goto err_connector;
  67         }
  68
  69         drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
  70
  71         ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL);
  72         if (ret) {
  73                 DRM_ERROR("Failed to init encoder\n");
  74                 goto err_encoder;
  75         }
  76         encoder->possible_crtcs = 1;
  77
  78         ret = drm_connector_attach_encoder(connector, encoder);
  79         if (ret) {
  80                 DRM_ERROR("Failed to attach connector to encoder\n");
  81                 goto err_attach;
  82         }
  83
  84         if (vkmsdev->config->writeback) {
  85                 writeback = vkms_enable_writeback_connector(vkmsdev);
  86                 if (writeback)
  87                         DRM_ERROR("Failed to init writeback connector\n");
  88         }
  89
  90         drm_mode_config_reset(dev);
  91
  92         return 0;
  93
  94 err_attach:
  95         drm_encoder_cleanup(encoder);
  96
  97 err_encoder:
  98         drm_connector_cleanup(connector);
  99
 100 err_connector:
 101         drm_crtc_cleanup(crtc);
 102
 103 err_crtc:
 104         if (vkmsdev->config->cursor)
 105                 drm_plane_cleanup(cursor);
 106
 107 err_cursor:
 108         drm_plane_cleanup(primary);
 109
 110         return ret;
 111 }