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_print.h> 6 #include <drm/drm_probe_helper.h> 7 8 #include "mgag200_ddc.h" 9 #include "mgag200_drv.h" 10 11 static const struct drm_encoder_funcs mgag200_dac_encoder_funcs = { 12 .destroy = drm_encoder_cleanup 13 }; 14 15 static const struct drm_connector_helper_funcs mgag200_vga_connector_helper_funcs = { 16 .get_modes = drm_connector_helper_get_modes, 17 .detect_ctx = drm_connector_helper_detect_from_ddc 18 }; 19 20 static const struct drm_connector_funcs mgag200_vga_connector_funcs = { 21 .reset = drm_atomic_helper_connector_reset, 22 .fill_modes = drm_helper_probe_single_connector_modes, 23 .destroy = drm_connector_cleanup, 24 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 25 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state 26 }; 27 28 int mgag200_vga_output_init(struct mga_device *mdev) 29 { 30 struct drm_device *dev = &mdev->base; 31 struct drm_crtc *crtc = &mdev->crtc; 32 struct drm_encoder *encoder; 33 struct drm_connector *connector; 34 struct i2c_adapter *ddc; 35 int ret; 36 37 encoder = &mdev->output.vga.encoder; 38 ret = drm_encoder_init(dev, encoder, &mgag200_dac_encoder_funcs, 39 DRM_MODE_ENCODER_DAC, NULL); 40 if (ret) { 41 drm_err(dev, "drm_encoder_init() failed: %d\n", ret); 42 return ret; 43 } 44 encoder->possible_crtcs = drm_crtc_mask(crtc); 45 46 ddc = mgag200_ddc_create(mdev); 47 if (IS_ERR(ddc)) { 48 ret = PTR_ERR(ddc); 49 drm_err(dev, "failed to add DDC bus: %d\n", ret); 50 return ret; 51 } 52 53 connector = &mdev->output.vga.connector; 54 ret = drm_connector_init_with_ddc(dev, connector, 55 &mgag200_vga_connector_funcs, 56 DRM_MODE_CONNECTOR_VGA, ddc); 57 if (ret) { 58 drm_err(dev, "drm_connector_init_with_ddc() failed: %d\n", ret); 59 return ret; 60 } 61 drm_connector_helper_add(connector, &mgag200_vga_connector_helper_funcs); 62 63 connector->polled = DRM_CONNECTOR_POLL_CONNECT | 64 DRM_CONNECTOR_POLL_DISCONNECT; 65 66 ret = drm_connector_attach_encoder(connector, encoder); 67 if (ret) { 68 drm_err(dev, "drm_connector_attach_encoder() failed: %d\n", ret); 69 return ret; 70 } 71 72 return 0; 73 } 74