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 /* Use the default modes list from DRM */ 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) 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, *overlay, *cursor = NULL; 43 int ret; 44 int writeback; 45 unsigned int n; 46 47 /* 48 * Initialize used plane. One primary plane is required to perform the composition. 49 * 50 * The overlay and cursor planes are not mandatory, but can be used to perform complex 51 * composition. 52 */ 53 primary = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_PRIMARY); 54 if (IS_ERR(primary)) 55 return PTR_ERR(primary); 56 57 if (vkmsdev->config->cursor) { 58 cursor = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_CURSOR); 59 if (IS_ERR(cursor)) 60 return PTR_ERR(cursor); 61 } 62 63 ret = vkms_crtc_init(dev, crtc, &primary->base, &cursor->base); 64 if (ret) 65 return ret; 66 67 if (vkmsdev->config->overlay) { 68 for (n = 0; n < NUM_OVERLAY_PLANES; n++) { 69 overlay = vkms_plane_init(vkmsdev, DRM_PLANE_TYPE_OVERLAY); 70 if (IS_ERR(overlay)) { 71 DRM_DEV_ERROR(dev->dev, "Failed to init vkms plane\n"); 72 return PTR_ERR(overlay); 73 } 74 overlay->base.possible_crtcs = drm_crtc_mask(crtc); 75 } 76 } 77 78 ret = drm_connector_init(dev, connector, &vkms_connector_funcs, 79 DRM_MODE_CONNECTOR_VIRTUAL); 80 if (ret) { 81 DRM_ERROR("Failed to init connector\n"); 82 return ret; 83 } 84 85 drm_connector_helper_add(connector, &vkms_conn_helper_funcs); 86 87 ret = drm_encoder_init(dev, encoder, &vkms_encoder_funcs, 88 DRM_MODE_ENCODER_VIRTUAL, NULL); 89 if (ret) { 90 DRM_ERROR("Failed to init encoder\n"); 91 goto err_encoder; 92 } 93 encoder->possible_crtcs = drm_crtc_mask(crtc); 94 95 ret = drm_connector_attach_encoder(connector, encoder); 96 if (ret) { 97 DRM_ERROR("Failed to attach connector to encoder\n"); 98 goto err_attach; 99 } 100 101 if (vkmsdev->config->writeback) { 102 writeback = vkms_enable_writeback_connector(vkmsdev); 103 if (writeback) 104 DRM_ERROR("Failed to init writeback connector\n"); 105 } 106 107 drm_mode_config_reset(dev); 108 109 return 0; 110 111 err_attach: 112 drm_encoder_cleanup(encoder); 113 114 err_encoder: 115 drm_connector_cleanup(connector); 116 117 return ret; 118 } 119