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 vkms_plane *primary, *cursor = NULL, *overlay = 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->overlay) {
  51                 overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
  52                 if (IS_ERR(overlay))
  53                         return PTR_ERR(overlay);
  54
  55                 if (!overlay->base.possible_crtcs)
  56                         overlay->base.possible_crtcs = drm_crtc_mask(crtc);
  57         }
  58
  59         if (vkmsdev->config->cursor) {
  60                 cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
  61                 if (IS_ERR(cursor))
  62                         return PTR_ERR(cursor);
  63         }
  64
  65         ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
  66         if (ret)
  67                 return ret;
  68
  69         ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
  70                                  DRM_MODE_CONNECTOR_VIRTUAL);
  71         if (ret) {
  72                 DRM_ERROR("Failed to init connector\n");
  73                 goto err_connector;
  74         }
  75
  76         drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
  77
  78         ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_VIRTUAL);
  79         if (ret) {
  80                 DRM_ERROR("Failed to init encoder\n");
  81                 goto err_encoder;
  82         }
  83         encoder->possible_crtcs = 1;
  84
  85         ret = drm_connector_attach_encoder(connector, encoder);
  86         if (ret) {
  87                 DRM_ERROR("Failed to attach connector to encoder\n");
  88                 goto err_attach;
  89         }
  90
  91         if (vkmsdev->config->writeback) {
  92                 writeback = vkms_enable_writeback_connector(vkmsdev);
  93                 if (writeback)
  94                         DRM_ERROR("Failed to init writeback connector\n");
  95         }
  96
  97         drm_mode_config_reset(dev);
  98
  99         return 0;
 100
 101 err_attach:
 102         drm_encoder_cleanup(encoder);
 103
 104 err_encoder:
 105         drm_connector_cleanup(connector);
 106
 107 err_connector:
 108         drm_crtc_cleanup(crtc);
 109
 110         return ret;
 111 }