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 <drm/drm_framebuffer.h> 8 #include "komeda_dev.h" 9 #include "komeda_kms.h" 10 11 static int 12 komeda_wb_init_data_flow(struct komeda_layer *wb_layer, 13 struct drm_connector_state *conn_st, 14 struct komeda_crtc_state *kcrtc_st, 15 struct komeda_data_flow_cfg *dflow) 16 { 17 struct drm_framebuffer *fb = conn_st->writeback_job->fb; 18 19 memset(dflow, 0, sizeof(*dflow)); 20 21 dflow->out_w = fb->width; 22 dflow->out_h = fb->height; 23 24 /* the write back data comes from the compiz */ 25 pipeline_composition_size(kcrtc_st, &dflow->in_w, &dflow->in_h); 26 dflow->input.component = &wb_layer->base.pipeline->compiz->base; 27 /* compiz doesn't output alpha */ 28 dflow->pixel_blend_mode = DRM_MODE_BLEND_PIXEL_NONE; 29 dflow->rot = DRM_MODE_ROTATE_0; 30 31 komeda_complete_data_flow_cfg(wb_layer, dflow, fb); 32 33 return 0; 34 } 35 36 static int 37 komeda_wb_encoder_atomic_check(struct drm_encoder *encoder, 38 struct drm_crtc_state *crtc_st, 39 struct drm_connector_state *conn_st) 40 { 41 struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(crtc_st); 42 struct drm_writeback_job *writeback_job = conn_st->writeback_job; 43 struct komeda_layer *wb_layer; 44 struct komeda_data_flow_cfg dflow; 45 int err; 46 47 if (!writeback_job) 48 return 0; 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 struct drm_display_info *info; 146 u32 *formats, n_formats = 0; 147 int err; 148 149 if (!kcrtc->master->wb_layer) 150 return 0; 151 152 kwb_conn = kzalloc(sizeof(*kwb_conn), GFP_KERNEL); 153 if (!kwb_conn) 154 return -ENOMEM; 155 156 kwb_conn->wb_layer = kcrtc->master->wb_layer; 157 158 wb_conn = &kwb_conn->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 BIT(drm_crtc_index(&kcrtc->base))); 169 komeda_put_fourcc_list(formats); 170 if (err) { 171 kfree(kwb_conn); 172 return err; 173 } 174 175 drm_connector_helper_add(&wb_conn->base, &komeda_wb_conn_helper_funcs); 176 177 info = &kwb_conn->base.base.display_info; 178 info->bpc = __fls(kcrtc->master->improc->supported_color_depths); 179 info->color_formats = kcrtc->master->improc->supported_color_formats; 180 181 kcrtc->wb_conn = kwb_conn; 182 183 return 0; 184 } 185 186 int komeda_kms_add_wb_connectors(struct komeda_kms_dev *kms, 187 struct komeda_dev *mdev) 188 { 189 int i, err; 190 191 for (i = 0; i < kms->n_crtcs; i++) { 192 err = komeda_wb_connector_add(kms, &kms->crtcs[i]); 193 if (err) 194 return err; 195 } 196 197 return 0; 198 } 199