tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 4c116febc8d53bc1f8f25a3d60db331f17ab8cd8 commit: cad0702e5286d3cc80afe545de027858b855dd5a [1365/1365] DRM: Phytium display DRM driver config: arm64-randconfig-r064-20250103 (https://download.01.org/0day-ci/archive/20250103/202501030757.m59EWrOL-lkp@i...) compiler: aarch64-linux-gcc (GCC) 14.2.0 If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202501030757.m59EWrOL-lkp@intel.com/ cocci warnings: (new ones prefixed by >>)

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drivers/gpu/drm/phytium/phytium_debugfs.c:189:34-69: opportunity for str_enabled_disabled(phytium_dp -> panel . backlight_enabled) drivers/gpu/drm/phytium/phytium_debugfs.c:217:30-61: opportunity for str_enabled_disabled(phytium_dp -> panel . power_enabled) drivers/gpu/drm/phytium/phytium_debugfs.c:340:35-56: opportunity for str_yes_no(phytium_dp -> has_audio) -- drivers/gpu/drm/phytium/phytium_dp.c:1279:10-34: opportunity for str_enable_disable(mode == DRM_MODE_DPMS_ON) -- drivers/gpu/drm/phytium/phytium_panel.c:79:10-16: opportunity for str_enable_disable(enable)

vim +189 drivers/gpu/drm/phytium/phytium_debugfs.c 179 180 static int phytium_edp_backlight_show(struct seq_file *m, void *data) 181 { 182 struct drm_connector *connector = m->private; 183 struct phytium_dp_device *phytium_dp = connector_to_dp_device(connector); 184 185 if (!phytium_dp->is_edp) 186 return -ENODEV; 187 188 mutex_lock(&phytium_dp->panel.panel_lock);

189 seq_printf(m, "backlight: %s\n", phytium_dp->panel.backlight_enabled?"enabled":"disabled"); 190 mutex_unlock(&phytium_dp->panel.panel_lock); 191 192 return 0; 193 } 194 195 static int phytium_edp_backlight_open(struct inode *inode, struct file *file) 196 { 197 return single_open(file, phytium_edp_backlight_show, inode->i_private); 198 } 199 200 static const struct file_operations phytium_edp_backlight_fops = { 201 .owner = THIS_MODULE, 202 .open = phytium_edp_backlight_open, 203 .read = seq_read, 204 .llseek = seq_lseek, 205 .release = single_release, 206 }; 207 208 static int phytium_edp_power_show(struct seq_file *m, void *data) 209 { 210 struct drm_connector *connector = m->private; 211 struct phytium_dp_device *phytium_dp = connector_to_dp_device(connector); 212 213 if (!phytium_dp->is_edp) 214 return -ENODEV; 215 216 mutex_lock(&phytium_dp->panel.panel_lock); 217 seq_printf(m, "power: %s\n", phytium_dp->panel.power_enabled?"enabled":"disabled"); 218 mutex_unlock(&phytium_dp->panel.panel_lock); 219 220 return 0; 221 } 222 223 static int phytium_edp_power_open(struct inode *inode, struct file *file) 224 { 225 return single_open(file, phytium_edp_power_show, inode->i_private); 226 } 227 228 static const struct file_operations phytium_edp_power_fops = { 229 .owner = THIS_MODULE, 230 .open = phytium_edp_power_open, 231 .read = seq_read, 232 .llseek = seq_lseek, 233 .release = single_release, 234 }; 235 236 struct dpcd_block { 237 /* DPCD dump start address. */ 238 unsigned int offset; 239 /* DPCD dump end address, inclusive. If unset, .size will be used. */ 240 unsigned int end; 241 /* DPCD dump size. Used if .end is unset. If unset, defaults to 1. */ 242 size_t size; 243 /* Only valid for eDP. */ 244 bool edp; 245 }; 246 247 static const struct dpcd_block phytium_dpcd_debug[] = { 248 { .offset = DP_DPCD_REV, .size = DP_RECEIVER_CAP_SIZE }, 249 { .offset = DP_PSR_SUPPORT, .end = DP_PSR_CAPS }, 250 { .offset = DP_DOWNSTREAM_PORT_0, .size = 16 }, 251 { .offset = DP_LINK_BW_SET, .end = DP_EDP_CONFIGURATION_SET }, 252 { .offset = DP_SINK_COUNT, .end = DP_ADJUST_REQUEST_LANE2_3 }, 253 { .offset = DP_SET_POWER }, 254 { .offset = DP_EDP_DPCD_REV }, 255 { .offset = DP_EDP_GENERAL_CAP_1, .end = DP_EDP_GENERAL_CAP_3 }, 256 { .offset = DP_EDP_DISPLAY_CONTROL_REGISTER, .end = DP_EDP_BACKLIGHT_FREQ_CAP_MAX_LSB }, 257 { .offset = DP_EDP_DBC_MINIMUM_BRIGHTNESS_SET, .end = DP_EDP_DBC_MAXIMUM_BRIGHTNESS_SET }, 258 { .offset = DP_DEVICE_SERVICE_IRQ_VECTOR, .size = 1 }, 259 { .offset = DP_TEST_REQUEST, .end = DP_TEST_PATTERN }, 260 }; 261 262 static int phytium_dpcd_show(struct seq_file *m, void *data) 263 { 264 struct drm_connector *connector = m->private; 265 struct phytium_dp_device *phytium_dp = connector_to_dp_device(connector); 266 uint8_t buf[16], i; 267 ssize_t err; 268 269 if (connector->status != connector_status_connected) 270 return -ENODEV; 271 272 for (i = 0; i < ARRAY_SIZE(phytium_dpcd_debug); i++) { 273 const struct dpcd_block *b = &phytium_dpcd_debug[i]; 274 size_t size = b->end ? b->end - b->offset + 1 : (b->size ?: 1); 275 276 if (WARN_ON(size > sizeof(buf))) 277 continue; 278 279 err = drm_dp_dpcd_read(&phytium_dp->aux, b->offset, buf, size); 280 if (err <= 0) { 281 DRM_ERROR("dpcd read (%zu bytes at %u) failed (%zd)\n", 282 size, b->offset, err); 283 continue; 284 } 285 286 seq_printf(m, "%04x: %*ph\n", b->offset, (int) size, buf); 287 } 288 289 return 0; 290 } 291 292 static int phytium_dpcd_open(struct inode *inode, struct file *file) 293 { 294 return single_open(file, phytium_dpcd_show, inode->i_private); 295 } 296 297 static const struct file_operations phytium_dpcd_fops = { 298 .owner = THIS_MODULE, 299 .open = phytium_dpcd_open, 300 .read = seq_read, 301 .llseek = seq_lseek, 302 .release = single_release, 303 }; 304 305 static ssize_t 306 phytium_dp_state_write(struct file *filp, 307 const char __user *ubuf, 308 size_t len, 309 loff_t *ppos) 310 { 311 char tmp[16]; 312 313 if (len >= sizeof(tmp)) 314 return -EINVAL; 315 316 memset(tmp, 0, sizeof(tmp)); 317 if (copy_from_user(tmp, ubuf, len)) 318 return -EFAULT; 319 tmp[len] = '\0'; 320 321 return len; 322 } 323 324 static int phytium_dp_state_show(struct seq_file *m, void *data) 325 { 326 struct drm_connector *connector = m->private; 327 struct phytium_dp_device *phytium_dp = connector_to_dp_device(connector); 328 329 seq_printf(m, "port number: %d\n", phytium_dp->port); 330 seq_printf(m, "source_max_lane_count: %d\n", phytium_dp->source_max_lane_count); 331 seq_printf(m, "max_source_rates: %d\n", 332 phytium_dp->source_rates[phytium_dp->num_source_rates-1]); 333 if (connector->status == connector_status_connected) { 334 seq_printf(m, "sink_max_lane_count: %d\n", phytium_dp->sink_max_lane_count); 335 seq_printf(m, "max_sink_rates: %d\n", 336 phytium_dp->sink_rates[phytium_dp->num_sink_rates-1]); 337 seq_printf(m, "link_rate: %d\n", phytium_dp->link_rate); 338 seq_printf(m, "link_lane_count: %d\n", phytium_dp->link_lane_count); 339 seq_printf(m, "train_set[0]: %d\n", phytium_dp->train_set[0]); 340 seq_printf(m, "has_audio: %s\n", phytium_dp->has_audio?"yes":"no"); 341 } 342 343 return 0; 344 } 345

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