1 // SPDX-License-Identifier: GPL-2.0-only 2 3 #include <drm/drm_atomic_helper.h> 4 #include <drm/drm_modeset_helper_vtables.h> 5 #include <drm/drm_probe_helper.h> 6 7 #include "mgag200_ddc.h" 8 #include "mgag200_drv.h" 9 10 static const struct drm_encoder_funcs mgag200_dac_encoder_funcs = { 11 .destroy = drm_encoder_cleanup 12 }; 13 14 static const struct drm_connector_helper_funcs mgag200_vga_connector_helper_funcs = { 15 .get_modes = drm_connector_helper_get_modes, 16 .detect_ctx = drm_connector_helper_detect_from_ddc 17 }; 18 19 static const struct drm_connector_funcs mgag200_vga_connector_funcs = { 20 .reset = drm_atomic_helper_connector_reset, 21 .fill_modes = drm_helper_probe_single_connector_modes, 22 .destroy = drm_connector_cleanup, 23 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 24 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state 25 }; 26 27 int mgag200_vga_output_init(struct mga_device *mdev) 28 { 29 struct drm_device *dev = &mdev->base; 30 struct drm_crtc *crtc = &mdev->crtc; 31 struct drm_encoder *encoder; 32 struct drm_connector *connector; 33 struct i2c_adapter *ddc; 34 int ret; 35 36 encoder = &mdev->output.vga.encoder; 37 ret = drm_encoder_init(dev, encoder, &mgag200_dac_encoder_funcs, 38 DRM_MODE_ENCODER_DAC, NULL); 39 if (ret) { 40 drm_err(dev, "drm_encoder_init() failed: %d\n", ret); 41 return ret; 42 } 43 encoder->possible_crtcs = drm_crtc_mask(crtc); 44 45 ddc = mgag200_ddc_create(mdev); 46 if (IS_ERR(ddc)) { 47 ret = PTR_ERR(ddc); 48 drm_err(dev, "failed to add DDC bus: %d\n", ret); 49 return ret; 50 } 51 52 connector = &mdev->output.vga.connector; 53 ret = drm_connector_init_with_ddc(dev, connector, 54 &mgag200_vga_connector_funcs, 55 DRM_MODE_CONNECTOR_VGA, ddc); 56 if (ret) { 57 drm_err(dev, "drm_connector_init_with_ddc() failed: %d\n", ret); 58 return ret; 59 } 60 drm_connector_helper_add(connector, &mgag200_vga_connector_helper_funcs); 61 62 connector->polled = DRM_CONNECTOR_POLL_CONNECT | 63 DRM_CONNECTOR_POLL_DISCONNECT; 64 65 ret = drm_connector_attach_encoder(connector, encoder); 66 if (ret) { 67 drm_err(dev, "drm_connector_attach_encoder() failed: %d\n", ret); 68 return ret; 69 } 70 71 return 0; 72 } 73