1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved. 4 * Author: James.Qian.Wang <james.qian.wang@arm.com> 5 * 6 */ 7 #include "komeda_dev.h" 8 #include "komeda_kms.h" 9 10 static int 11 komeda_wb_init_data_flow(struct komeda_layer *wb_layer, 12 struct drm_connector_state *conn_st, 13 struct komeda_crtc_state *kcrtc_st, 14 struct komeda_data_flow_cfg *dflow) 15 { 16 struct drm_framebuffer *fb = conn_st->writeback_job->fb; 17 18 memset(dflow, 0, sizeof(*dflow)); 19 20 dflow->out_w = fb->width; 21 dflow->out_h = fb->height; 22 23 /* the write back data comes from the compiz */ 24 pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h); 25 dflow->input.component = &wb_layer->base.pipeline->compiz->base; 26 /* compiz doesn't output alpha */ 27 dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE; 28 dflow->rot = DRM_MODE_ROTATE_0; 29 30 komeda_complete_data_flow_cfg(wb_layer, dflow, fb); 31 32 return 0; 33 } 34 35 static int 36 komeda_wb_encoder_atomic_check(struct drm_encoder *encoder, 37 struct drm_crtc_state *crtc_st, 38 struct drm_connector_state *conn_st) 39 { 40 struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st); 41 struct drm_writeback_job *writeback_job = conn_st->writeback_job; 42 struct komeda_layer *wb_layer; 43 struct komeda_data_flow_cfg dflow; 44 int err; 45 46 if (!writeback_job) 47 return 0; 48 49 if (!crtc_st->active) { 50 DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n"); 51 return -EINVAL; 52 } 53 54 wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer; 55 56 /* 57 * No need for a full modested when the only connector changed is the 58 * writeback connector. 59 */ 60 if (crtc_st->connectors_changed && 61 is_only_changed_connector(crtc_st, conn_st->connector)) 62 crtc_st->connectors_changed = false; 63 64 err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow); 65 if (err) 66 return err; 67 68 if (dflow.en_split) 69 err = komeda_build_wb_split_data_flow(wb_layer, 70 conn_st, kcrtc_st, &dflow); 71 else 72 err = komeda_build_wb_data_flow(wb_layer, 73 conn_st, kcrtc_st, &dflow); 74 75 return err; 76 } 77 78 static const struct drm_encoder_helper_funcs komeda_wb_encoder_helper_funcs = { 79 .atomic_check = komeda_wb_encoder_atomic_check, 80 }; 81 82 static int 83 komeda_wb_connector_get_modes(struct drm_connector *connector) 84 { 85 return 0; 86 } 87 88 static enum drm_mode_status 89 komeda_wb_connector_mode_valid(struct drm_connector *connector, 90 struct drm_display_mode *mode) 91 { 92 struct drm_device *dev = connector->dev; 93 struct drm_mode_config *mode_config = &dev->mode_config; 94 int w = mode->hdisplay, h = mode->vdisplay; 95 96 if ((w < mode_config->min_width) || (w > mode_config->max_width)) 97 return MODE_BAD_HVALUE; 98 99 if ((h < mode_config->min_height) || (h > mode_config->max_height)) 100 return MODE_BAD_VVALUE; 101 102 return MODE_OK; 103 } 104 105 static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs = { 106 .get_modes = komeda_wb_connector_get_modes, 107 .mode_valid = komeda_wb_connector_mode_valid, 108 }; 109 110 static enum drm_connector_status 111 komeda_wb_connector_detect(struct drm_connector *connector, bool force) 112 { 113 return connector_status_connected; 114 } 115 116 static int 117 komeda_wb_connector_fill_modes(struct drm_connector *connector, 118 uint32_t maxX, uint32_t maxY) 119 { 120 return 0; 121 } 122 123 static void komeda_wb_connector_destroy(struct drm_connector *connector) 124 { 125 drm_connector_cleanup(connector); 126 kfree(to_kconn(to_wb_conn(connector))); 127 } 128 129 static const struct drm_connector_funcs komeda_wb_connector_funcs = { 130 .reset = drm_atomic_helper_connector_reset, 131 .detect = komeda_wb_connector_detect, 132 .fill_modes = komeda_wb_connector_fill_modes, 133 .destroy = komeda_wb_connector_destroy, 134 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 135 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 136 }; 137 138 static int komeda_wb_connector_add(struct komeda_kms_dev *kms, 139 struct komeda_crtc *kcrtc) 140 { 141 struct komeda_dev *mdev = kms->base.dev_private; 142 struct komeda_wb_connector *kwb_conn; 143 struct drm_writeback_connector *wb_conn; 144 u32 *formats, n_formats = 0; 145 int err; 146 147 if (!kcrtc->master->wb_layer) 148 return 0; 149 150 kwb_conn = kzalloc(sizeof(*kwb_conn), GFP_KERNEL); 151 if (!kwb_conn) 152 return -ENOMEM; 153 154 kwb_conn->wb_layer = kcrtc->master->wb_layer; 155 156 wb_conn = &kwb_conn->base; 157 wb_conn->encoder.possible_crtcs = BIT(drm_crtc_index(&kcrtc->base)); 158 159 formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl, 160 kwb_conn->wb_layer->layer_type, 161 &n_formats); 162 163 err = drm_writeback_connector_init(&kms->base, wb_conn, 164 &komeda_wb_connector_funcs, 165 &komeda_wb_encoder_helper_funcs, 166 formats, n_formats); 167 komeda_put_fourcc_list(formats); 168 if (err) { 169 kfree(kwb_conn); 170 return err; 171 } 172 173 drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs); 174 175 kcrtc->wb_conn = kwb_conn; 176 177 return 0; 178 } 179 180 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms, 181 struct komeda_dev *mdev) 182 { 183 int i, err; 184 185 for (i = 0; i < kms->n_crtcs; i++) { 186 err = komeda_wb_connector_add(kms, &kms->crtcs[i]); 187 if (err) 188 return err; 189 } 190 191 return 0; 192 } 193