1 // SPDX-License-Identifier: MIT 2 3 #include <drm/drm_atomic_state_helper.h> 4 #include <drm/drm_edid.h> 5 #include <drm/drm_modeset_helper_vtables.h> 6 #include <drm/drm_print.h> 7 #include <drm/drm_probe_helper.h> 8 9 #include "ast_ddc.h" 10 #include "ast_drv.h" 11 12 /* 13 * Encoder 14 */ 15 16 static const struct drm_encoder_funcs ast_sil164_encoder_funcs = { 17 .destroy = drm_encoder_cleanup, 18 }; 19 20 /* 21 * Connector 22 */ 23 24 static int ast_sil164_connector_helper_get_modes(struct drm_connector *connector) 25 { 26 struct ast_connector *ast_connector = to_ast_connector(connector); 27 int count; 28 29 if (ast_connector->physical_status == connector_status_connected) { 30 count = drm_connector_helper_get_modes(connector); 31 } else { 32 /* 33 * There's no EDID data without a connected monitor. Set BMC- 34 * compatible modes in this case. The XGA default resolution 35 * should work well for all BMCs. 36 */ 37 count = drm_add_modes_noedid(connector, 4096, 4096); 38 if (count) 39 drm_set_preferred_mode(connector, 1024, 768); 40 } 41 42 return count; 43 } 44 45 static int ast_sil164_connector_helper_detect_ctx(struct drm_connector *connector, 46 struct drm_modeset_acquire_ctx *ctx, 47 bool force) 48 { 49 struct ast_connector *ast_connector = to_ast_connector(connector); 50 enum drm_connector_status status; 51 52 status = drm_connector_helper_detect_from_ddc(connector, ctx, force); 53 54 if (status != ast_connector->physical_status) 55 ++connector->epoch_counter; 56 ast_connector->physical_status = status; 57 58 return connector_status_connected; 59 } 60 61 static const struct drm_connector_helper_funcs ast_sil164_connector_helper_funcs = { 62 .get_modes = ast_sil164_connector_helper_get_modes, 63 .detect_ctx = ast_sil164_connector_helper_detect_ctx, 64 }; 65 66 static const struct drm_connector_funcs ast_sil164_connector_funcs = { 67 .reset = drm_atomic_helper_connector_reset, 68 .fill_modes = drm_helper_probe_single_connector_modes, 69 .destroy = drm_connector_cleanup, 70 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 71 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 72 }; 73 74 /* 75 * Output 76 */ 77 78 int ast_sil164_output_init(struct ast_device *ast) 79 { 80 struct drm_device *dev = &ast->base; 81 struct drm_crtc *crtc = &ast->crtc; 82 struct i2c_adapter *ddc; 83 struct drm_encoder *encoder; 84 struct ast_connector *ast_connector; 85 struct drm_connector *connector; 86 int ret; 87 88 /* DDC */ 89 90 ddc = ast_ddc_create(ast); 91 if (IS_ERR(ddc)) 92 return PTR_ERR(ddc); 93 94 /* encoder */ 95 96 encoder = &ast->output.sil164.encoder; 97 ret = drm_encoder_init(dev, encoder, &ast_sil164_encoder_funcs, 98 DRM_MODE_ENCODER_TMDS, NULL); 99 if (ret) 100 return ret; 101 encoder->possible_crtcs = drm_crtc_mask(crtc); 102 103 /* connector */ 104 105 ast_connector = &ast->output.sil164.connector; 106 connector = &ast_connector->base; 107 ret = drm_connector_init_with_ddc(dev, connector, &ast_sil164_connector_funcs, 108 DRM_MODE_CONNECTOR_DVII, ddc); 109 if (ret) 110 return ret; 111 drm_connector_helper_add(connector, &ast_sil164_connector_helper_funcs); 112 113 connector->interlace_allowed = 0; 114 connector->doublescan_allowed = 0; 115 connector->polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; 116 117 ast_connector->physical_status = connector->status; 118 119 ret = drm_connector_attach_encoder(connector, encoder); 120 if (ret) 121 return ret; 122 123 return 0; 124 } 125