tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: e844ee04dee0cf1b6d97183c12266c7726d73636 commit: e76599df354df9f0e919d97dfea80590c24d9abb [5501/13432] drm/tegra: Add NVDEC driver config: arm-buildonly-randconfig-r006-20211031 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout e76599df354df9f0e919d97dfea80590c24d9abb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/gpu/drm/tegra/nvdec.c:240:12: error: 'nvdec_runtime_resume' defined but not used [-Werror=unused-function] 240 | static int nvdec_runtime_resume(struct device *dev) | ^~~~~~~~~~~~~~~~~~~~ 48 | static void nvdec_writel(struct nvdec *nvdec, u32 value, unsigned int offset) | ^~~~~~~~~~~~ cc1: all warnings being treated as errors vim +/nvdec_writel +48 drivers/gpu/drm/tegra/nvdec.c 47 49 { 50 writel(value, nvdec->regs + offset); 51 } 52 53 static int nvdec_boot(struct nvdec *nvdec) 54 { 55 #ifdef CONFIG_IOMMU_API 56 struct iommu_fwspec *spec = dev_iommu_fwspec_get(nvdec->dev); 57 #endif 58 int err; 59 60 #ifdef CONFIG_IOMMU_API 61 if (nvdec->config->supports_sid && spec) { 62 u32 value; 63 64 value = TRANSCFG_ATT(1, TRANSCFG_SID_FALCON) | TRANSCFG_ATT(0, TRANSCFG_SID_HW); 65 nvdec_writel(nvdec, value, VIC_TFBIF_TRANSCFG); 66 67 if (spec->num_ids > 0) { 68 value = spec->ids[0] & 0xffff; 69 70 nvdec_writel(nvdec, value, VIC_THI_STREAMID0); 71 nvdec_writel(nvdec, value, VIC_THI_STREAMID1); 72 } 73 } 74 #endif 75 76 err = falcon_boot(&nvdec->falcon); 77 if (err < 0) 78 return err; 79 80 err = falcon_wait_idle(&nvdec->falcon); 81 if (err < 0) { 82 dev_err(nvdec->dev, "falcon boot timed out\n"); 83 return err; 84 } 85 86 return 0; 87 } 88 89 static int nvdec_init(struct host1x_client *client) 90 { 91 struct tegra_drm_client *drm = host1x_to_drm_client(client); 92 struct drm_device *dev = dev_get_drvdata(client->host); 93 struct tegra_drm *tegra = dev->dev_private; 94 struct nvdec *nvdec = to_nvdec(drm); 95 int err; 96 97 err = host1x_client_iommu_attach(client); 98 if (err < 0 && err != -ENODEV) { 99 dev_err(nvdec->dev, "failed to attach to domain: %d\n", err); 100 return err; 101 } 102 103 nvdec->channel = host1x_channel_request(client); 104 if (!nvdec->channel) { 105 err = -ENOMEM; 106 goto detach; 107 } 108 109 client->syncpts[0] = host1x_syncpt_request(client, 0); 110 if (!client->syncpts[0]) { 111 err = -ENOMEM; 112 goto free_channel; 113 } 114 115 err = tegra_drm_register_client(tegra, drm); 116 if (err < 0) 117 goto free_syncpt; 118 119 /* 120 * Inherit the DMA parameters (such as maximum segment size) from the 121 * parent host1x device. 122 */ 123 client->dev->dma_parms = client->host->dma_parms; 124 125 return 0; 126 127 free_syncpt: 128 host1x_syncpt_put(client->syncpts[0]); 129 free_channel: 130 host1x_channel_put(nvdec->channel); 131 detach: 132 host1x_client_iommu_detach(client); 133 134 return err; 135 } 136 137 static int nvdec_exit(struct host1x_client *client) 138 { 139 struct tegra_drm_client *drm = host1x_to_drm_client(client); 140 struct drm_device *dev = dev_get_drvdata(client->host); 141 struct tegra_drm *tegra = dev->dev_private; 142 struct nvdec *nvdec = to_nvdec(drm); 143 int err; 144 145 /* avoid a dangling pointer just in case this disappears */ 146 client->dev->dma_parms = NULL; 147 148 err = tegra_drm_unregister_client(tegra, drm); 149 if (err < 0) 150 return err; 151 152 host1x_syncpt_put(client->syncpts[0]); 153 host1x_channel_put(nvdec->channel); 154 host1x_client_iommu_detach(client); 155 156 if (client->group) { 157 dma_unmap_single(nvdec->dev, nvdec->falcon.firmware.phys, 158 nvdec->falcon.firmware.size, DMA_TO_DEVICE); 159 tegra_drm_free(tegra, nvdec->falcon.firmware.size, 160 nvdec->falcon.firmware.virt, 161 nvdec->falcon.firmware.iova); 162 } else { 163 dma_free_coherent(nvdec->dev, nvdec->falcon.firmware.size, 164 nvdec->falcon.firmware.virt, 165 nvdec->falcon.firmware.iova); 166 } 167 168 return 0; 169 } 170 171 static const struct host1x_client_ops nvdec_client_ops = { 172 .init = nvdec_init, 173 .exit = nvdec_exit, 174 }; 175 176 static int nvdec_load_firmware(struct nvdec *nvdec) 177 { 178 struct host1x_client *client = &nvdec->client.base; 179 struct tegra_drm *tegra = nvdec->client.drm; 180 dma_addr_t iova; 181 size_t size; 182 void *virt; 183 int err; 184 185 if (nvdec->falcon.firmware.virt) 186 return 0; 187 188 err = falcon_read_firmware(&nvdec->falcon, nvdec->config->firmware); 189 if (err < 0) 190 return err; 191 192 size = nvdec->falcon.firmware.size; 193 194 if (!client->group) { 195 virt = dma_alloc_coherent(nvdec->dev, size, &iova, GFP_KERNEL); 196 197 err = dma_mapping_error(nvdec->dev, iova); 198 if (err < 0) 199 return err; 200 } else { 201 virt = tegra_drm_alloc(tegra, size, &iova); 202 } 203 204 nvdec->falcon.firmware.virt = virt; 205 nvdec->falcon.firmware.iova = iova; 206 207 err = falcon_load_firmware(&nvdec->falcon); 208 if (err < 0) 209 goto cleanup; 210 211 /* 212 * In this case we have received an IOVA from the shared domain, so we 213 * need to make sure to get the physical address so that the DMA API 214 * knows what memory pages to flush the cache for. 215 */ 216 if (client->group) { 217 dma_addr_t phys; 218 219 phys = dma_map_single(nvdec->dev, virt, size, DMA_TO_DEVICE); 220 221 err = dma_mapping_error(nvdec->dev, phys); 222 if (err < 0) 223 goto cleanup; 224 225 nvdec->falcon.firmware.phys = phys; 226 } 227 228 return 0; 229 230 cleanup: 231 if (!client->group) 232 dma_free_coherent(nvdec->dev, size, virt, iova); 233 else 234 tegra_drm_free(tegra, size, virt, iova); 235 236 return err; 237 } 238 239 241 { 242 struct nvdec *nvdec = dev_get_drvdata(dev); 243 int err; 244 245 err = clk_prepare_enable(nvdec->clk); 246 if (err < 0) 247 return err; 248 249 usleep_range(10, 20); 250 251 err = nvdec_load_firmware(nvdec); 252 if (err < 0) 253 goto disable; 254 255 err = nvdec_boot(nvdec); 256 if (err < 0) 257 goto disable; 258 259 return 0; 260 261 disable: 262 clk_disable_unprepare(nvdec->clk); 263 return err; 264 } 265 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org