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_edid.h>
   6 #include <drm/drm_probe_helper.h>
   7
   8 static const struct drm_connector_funcs vkms_connector_funcs = {
   9         .fill_modes = drm_helper_probe_single_connector_modes,
  10         .destroy = drm_connector_cleanup,
  11         .reset = drm_atomic_helper_connector_reset,
  12         .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
  13         .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
  14 };
  15
  16 static const struct drm_encoder_funcs vkms_encoder_funcs = {
  17         .destroy = drm_encoder_cleanup,
  18 };
  19
  20 static int vkms_conn_get_modes(struct drm_connector *connector)
  21 {
  22         int count;
  23
  24         count = drm_add_modes_noedid(connector, XRES_MAX, YRES_MAX);
  25         drm_set_preferred_mode(connector, XRES_DEF, YRES_DEF);
  26
  27         return count;
  28 }
  29
  30 static const struct drm_connector_helper_funcs vkms_conn_helper_funcs = {
  31         .get_modes    = vkms_conn_get_modes,
  32 };
  33
  34 static int vkms_add_overlay_plane(struct vkms_device *vkmsdev, int index,
  35                                   struct drm_crtc *crtc)
  36 {
  37         struct vkms_plane *overlay;
  38
  39         overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY, index);
  40         if (IS_ERR(overlay))
  41                 return PTR_ERR(overlay);
  42
  43         if (!overlay->base.possible_crtcs)
  44                 overlay->base.possible_crtcs = drm_crtc_mask(crtc);
  45
  46         return 0;
  47 }
  48
  49 int vkms_output_init(struct vkms_device *vkmsdev, int index)
  50 {
  51         struct vkms_output *output = &vkmsdev->output;
  52         struct drm_device *dev = &vkmsdev->drm;
  53         struct drm_connector *connector = &output->connector;
  54         struct drm_encoder *encoder = &output->encoder;
  55         struct drm_crtc *crtc = &output->crtc;
  56         struct vkms_plane *primary, *cursor = NULL;
  57         int ret;
  58         int writeback;
  59         unsigned int n;
  60
  61         primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY, index);
  62         if (IS_ERR(primary))
  63                 return PTR_ERR(primary);
  64
  65         if (vkmsdev->config->overlay) {
  66                 for (n = 0; n < NUM_OVERLAY_PLANES; n++) {
  67                         ret = vkms_add_overlay_plane(vkmsdev, index, crtc);
  68                         if (ret)
  69                                 return ret;
  70                 }
  71         }
  72
  73         if (vkmsdev->config->cursor) {
  74                 cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR, index);
  75                 if (IS_ERR(cursor))
  76                         return PTR_ERR(cursor);
  77         }
  78
  79         ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base);
  80         if (ret)
  81                 return ret;
  82
  83         ret = drm_connector_init(dev, connector, &vkms_connector_funcs,
  84                                  DRM_MODE_CONNECTOR_VIRTUAL);
  85         if (ret) {
  86                 DRM_ERROR("Failed to init connector\n");
  87                 goto err_connector;
  88         }
  89
  90         drm_connector_helper_add(connector, &vkms_conn_helper_funcs);
  91
  92         ret = drm_encoder_init(dev, encoder, &vkms_encoder_funcs,
  93                                DRM_MODE_ENCODER_VIRTUAL, NULL);
  94         if (ret) {
  95                 DRM_ERROR("Failed to init encoder\n");
  96                 goto err_encoder;
  97         }
  98         encoder->possible_crtcs = 1;
  99
 100         ret = drm_connector_attach_encoder(connector, encoder);
 101         if (ret) {
 102                 DRM_ERROR("Failed to attach connector to encoder\n");
 103                 goto err_attach;
 104         }
 105
 106         if (vkmsdev->config->writeback) {
 107                 writeback = vkms_enable_writeback_connector(vkmsdev);
 108                 if (writeback)
 109                         DRM_ERROR("Failed to init writeback connector\n");
 110         }
 111
 112         drm_mode_config_reset(dev);
 113
 114         return 0;
 115
 116 err_attach:
 117         drm_encoder_cleanup(encoder);
 118
 119 err_encoder:
 120         drm_connector_cleanup(connector);
 121
 122 err_connector:
 123         drm_crtc_cleanup(crtc);
 124
 125         return ret;
 126 }