1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2022 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: AMD 24 * 25 */ 26 27 #include "dm_services_types.h" 28 29 #include "amdgpu.h" 30 #include "amdgpu_dm.h" 31 #include "amdgpu_dm_wb.h" 32 #include "amdgpu_display.h" 33 #include "dc.h" 34 35 #include <drm/drm_edid.h> 36 #include <drm/drm_atomic_state_helper.h> 37 #include <drm/drm_modeset_helper_vtables.h> 38 39 static const u32 amdgpu_dm_wb_formats[] = { 40 DRM_FORMAT_XRGB2101010, 41 }; 42 43 static int amdgpu_dm_wb_encoder_atomic_check(struct drm_encoder *encoder, 44 struct drm_crtc_state *crtc_state, 45 struct drm_connector_state *conn_state) 46 { 47 struct drm_framebuffer *fb; 48 const struct drm_display_mode *mode = &crtc_state->mode; 49 bool found = false; 50 uint8_t i; 51 52 if (!conn_state->writeback_job || !conn_state->writeback_job->fb) 53 return 0; 54 55 fb = conn_state->writeback_job->fb; 56 if (fb->width != mode->hdisplay || fb->height != mode->vdisplay) { 57 DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", 58 fb->width, fb->height); 59 return -EINVAL; 60 } 61 62 for (i = 0; i < sizeof(amdgpu_dm_wb_formats) / sizeof(u32); i++) { 63 if (fb->format->format == amdgpu_dm_wb_formats[i]) 64 found = true; 65 } 66 67 if (!found) { 68 DRM_DEBUG_KMS("Invalid pixel format %p4cc\n", 69 &fb->format->format); 70 return -EINVAL; 71 } 72 73 return 0; 74 } 75 76 77 static int amdgpu_dm_wb_connector_get_modes(struct drm_connector *connector) 78 { 79 /* Maximum resolution supported by DWB */ 80 return drm_add_modes_noedid(connector, 3840, 2160); 81 } 82 83 static int amdgpu_dm_wb_prepare_job(struct drm_writeback_connector *wb_connector, 84 struct drm_writeback_job *job) 85 { 86 struct amdgpu_framebuffer *afb; 87 struct drm_gem_object *obj; 88 struct amdgpu_device *adev; 89 struct amdgpu_bo *rbo; 90 uint32_t domain; 91 int r; 92 93 if (!job->fb) { 94 DRM_DEBUG_KMS("No FB bound\n"); 95 return 0; 96 } 97 98 afb = to_amdgpu_framebuffer(job->fb); 99 obj = job->fb->obj[0]; 100 rbo = gem_to_amdgpu_bo(obj); 101 adev = amdgpu_ttm_adev(rbo->tbo.bdev); 102 103 r = amdgpu_bo_reserve(rbo, true); 104 if (r) { 105 dev_err(adev->dev, "fail to reserve bo (%d)\n", r); 106 return r; 107 } 108 109 r = dma_resv_reserve_fences(rbo->tbo.base.resv, 1); 110 if (r) { 111 dev_err(adev->dev, "reserving fence slot failed (%d)\n", r); 112 goto error_unlock; 113 } 114 115 domain = amdgpu_display_supported_domains(adev, rbo->flags); 116 117 r = amdgpu_bo_pin(rbo, domain); 118 if (unlikely(r != 0)) { 119 if (r != -ERESTARTSYS) 120 DRM_ERROR("Failed to pin framebuffer with error %d\n", r); 121 goto error_unlock; 122 } 123 124 r = amdgpu_ttm_alloc_gart(&rbo->tbo); 125 if (unlikely(r != 0)) { 126 DRM_ERROR("%p bind failed\n", rbo); 127 goto error_unpin; 128 } 129 130 amdgpu_bo_unreserve(rbo); 131 132 afb->address = amdgpu_bo_gpu_offset(rbo); 133 134 amdgpu_bo_ref(rbo); 135 136 return 0; 137 138 error_unpin: 139 amdgpu_bo_unpin(rbo); 140 141 error_unlock: 142 amdgpu_bo_unreserve(rbo); 143 return r; 144 } 145 146 static void amdgpu_dm_wb_cleanup_job(struct drm_writeback_connector *connector, 147 struct drm_writeback_job *job) 148 { 149 struct amdgpu_bo *rbo; 150 int r; 151 152 if (!job->fb) 153 return; 154 155 rbo = gem_to_amdgpu_bo(job->fb->obj[0]); 156 r = amdgpu_bo_reserve(rbo, false); 157 if (unlikely(r)) { 158 DRM_ERROR("failed to reserve rbo before unpin\n"); 159 return; 160 } 161 162 amdgpu_bo_unpin(rbo); 163 amdgpu_bo_unreserve(rbo); 164 amdgpu_bo_unref(&rbo); 165 } 166 167 static const struct drm_encoder_helper_funcs amdgpu_dm_wb_encoder_helper_funcs = { 168 .atomic_check = amdgpu_dm_wb_encoder_atomic_check, 169 }; 170 171 static const struct drm_connector_funcs amdgpu_dm_wb_connector_funcs = { 172 .fill_modes = drm_helper_probe_single_connector_modes, 173 .destroy = drm_connector_cleanup, 174 .reset = amdgpu_dm_connector_funcs_reset, 175 .atomic_duplicate_state = amdgpu_dm_connector_atomic_duplicate_state, 176 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 177 }; 178 179 static const struct drm_connector_helper_funcs amdgpu_dm_wb_conn_helper_funcs = { 180 .get_modes = amdgpu_dm_wb_connector_get_modes, 181 .prepare_writeback_job = amdgpu_dm_wb_prepare_job, 182 .cleanup_writeback_job = amdgpu_dm_wb_cleanup_job, 183 }; 184 185 int amdgpu_dm_wb_connector_init(struct amdgpu_display_manager *dm, 186 struct amdgpu_dm_wb_connector *wbcon, 187 uint32_t link_index) 188 { 189 struct dc *dc = dm->dc; 190 struct dc_link *link = dc_get_link_at_index(dc, link_index); 191 int res = 0; 192 193 wbcon->link = link; 194 195 drm_connector_helper_add(&wbcon->base.base, &amdgpu_dm_wb_conn_helper_funcs); 196 197 res = drm_writeback_connector_init(&dm->adev->ddev, &wbcon->base, 198 &amdgpu_dm_wb_connector_funcs, 199 &amdgpu_dm_wb_encoder_helper_funcs, 200 amdgpu_dm_wb_formats, 201 ARRAY_SIZE(amdgpu_dm_wb_formats), 202 amdgpu_dm_get_encoder_crtc_mask(dm->adev)); 203 204 if (res) 205 return res; 206 /* 207 * Some of the properties below require access to state, like bpc. 208 * Allocate some default initial connector state with our reset helper. 209 */ 210 if (wbcon->base.base.funcs->reset) 211 wbcon->base.base.funcs->reset(&wbcon->base.base); 212 213 return 0; 214 } 215