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 || !writeback_job->fb) { 47 return 0; 48 } 49 50 if (!crtc_st->active) { 51 DRM_DEBUG_ATOMIC("Cannot write the composition result out on a inactive CRTC.\n"); 52 return -EINVAL; 53 } 54 55 wb_layer = to_kconn(to_wb_conn(conn_st->connector))->wb_layer; 56 57 /* 58 * No need for a full modested when the only connector changed is the 59 * writeback connector. 60 */ 61 if (crtc_st->connectors_changed && 62 is_only_changed_connector(crtc_st, conn_st->connector)) 63 crtc_st->connectors_changed = false; 64 65 err = komeda_wb_init_data_flow(wb_layer, conn_st, kcrtc_st, &dflow); 66 if (err) 67 return err; 68 69 if (dflow.en_split) 70 err = komeda_build_wb_split_data_flow(wb_layer, 71 conn_st, kcrtc_st, &dflow); 72 else 73 err = komeda_build_wb_data_flow(wb_layer, 74 conn_st, kcrtc_st, &dflow); 75 76 return err; 77 } 78 79 static const struct drm_encoder_helper_funcs komeda_wb_encoder_helper_funcs = { 80 .atomic_check = komeda_wb_encoder_atomic_check, 81 }; 82 83 static int 84 komeda_wb_connector_get_modes(struct drm_connector *connector) 85 { 86 return 0; 87 } 88 89 static enum drm_mode_status 90 komeda_wb_connector_mode_valid(struct drm_connector *connector, 91 struct drm_display_mode *mode) 92 { 93 struct drm_device *dev = connector->dev; 94 struct drm_mode_config *mode_config = &dev->mode_config; 95 int w = mode->hdisplay, h = mode->vdisplay; 96 97 if ((w < mode_config->min_width) || (w > mode_config->max_width)) 98 return MODE_BAD_HVALUE; 99 100 if ((h < mode_config->min_height) || (h > mode_config->max_height)) 101 return MODE_BAD_VVALUE; 102 103 return MODE_OK; 104 } 105 106 static const struct drm_connector_helper_funcs komeda_wb_conn_helper_funcs = { 107 .get_modes = komeda_wb_connector_get_modes, 108 .mode_valid = komeda_wb_connector_mode_valid, 109 }; 110 111 static enum drm_connector_status 112 komeda_wb_connector_detect(struct drm_connector *connector, bool force) 113 { 114 return connector_status_connected; 115 } 116 117 static int 118 komeda_wb_connector_fill_modes(struct drm_connector *connector, 119 uint32_t maxX, uint32_t maxY) 120 { 121 return 0; 122 } 123 124 static void komeda_wb_connector_destroy(struct drm_connector *connector) 125 { 126 drm_connector_cleanup(connector); 127 kfree(to_kconn(to_wb_conn(connector))); 128 } 129 130 static const struct drm_connector_funcs komeda_wb_connector_funcs = { 131 .reset = drm_atomic_helper_connector_reset, 132 .detect = komeda_wb_connector_detect, 133 .fill_modes = komeda_wb_connector_fill_modes, 134 .destroy = komeda_wb_connector_destroy, 135 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 136 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 137 }; 138 139 static int komeda_wb_connector_add(struct komeda_kms_dev *kms, 140 struct komeda_crtc *kcrtc) 141 { 142 struct komeda_dev *mdev = kms->base.dev_private; 143 struct komeda_wb_connector *kwb_conn; 144 struct drm_writeback_connector *wb_conn; 145 u32 *formats, n_formats = 0; 146 int err; 147 148 if (!kcrtc->master->wb_layer) 149 return 0; 150 151 kwb_conn = kzalloc(sizeof(*wb_conn), GFP_KERNEL); 152 if (!kwb_conn) 153 return -ENOMEM; 154 155 kwb_conn->wb_layer = kcrtc->master->wb_layer; 156 157 wb_conn = &kwb_conn->base; 158 wb_conn->encoder.possible_crtcs = BIT(drm_crtc_index(&kcrtc->base)); 159 160 formats = komeda_get_layer_fourcc_list(&mdev->fmt_tbl, 161 kwb_conn->wb_layer->layer_type, 162 &n_formats); 163 164 err = drm_writeback_connector_init(&kms->base, wb_conn, 165 &komeda_wb_connector_funcs, 166 &komeda_wb_encoder_helper_funcs, 167 formats, n_formats); 168 komeda_put_fourcc_list(formats); 169 if (err) 170 return err; 171 172 drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs); 173 174 kcrtc->wb_conn = kwb_conn; 175 176 return 0; 177 } 178 179 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms, 180 struct komeda_dev *mdev) 181 { 182 int i, err; 183 184 for (i = 0; i < kms->n_crtcs; i++) { 185 err = komeda_wb_connector_add(kms, &kms->crtcs[i]); 186 if (err) 187 return err; 188 } 189 190 return 0; 191 } 192