Hi Rajeev, Thank you for the patch! Yet something to improve: [auto build test ERROR on drm-tip/drm-tip] [also build test ERROR on next-20210525] [cannot apply to robh/for-next drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next linus/master drm/drm-next v5.13-rc3] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Rajeev-Nandan/drm-Support-basic-DPCD-backlight-in-panel-simple-and-add-a-new-panel-ATNA33XC20/20210525-153326 base: git://anongit.freedesktop.org/drm/drm-tip drm-tip config: arm-randconfig-r025-20210525 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 99155e913e9bad5f7f8a247f8bb3a3ff3da74af1) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/0day-ci/linux/commit/24e7ccb98951b0b4c7ae8a367273f8e73c074804 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Rajeev-Nandan/drm-Support-basic-DPCD-backlight-in-panel-simple-and-add-a-new-panel-ATNA33XC20/20210525-153326 git checkout 24e7ccb98951b0b4c7ae8a367273f8e73c074804 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> drivers/gpu/drm/panel/panel-simple.c:185:32: error: field has incomplete type 'struct drm_edp_backlight_info' struct drm_edp_backlight_info info; ^ drivers/gpu/drm/panel/panel-simple.c:185:9: note: forward declaration of 'struct drm_edp_backlight_info' struct drm_edp_backlight_info info; ^ >> drivers/gpu/drm/panel/panel-simple.c:352:3: error: implicit declaration of function 'drm_edp_backlight_disable' [-Werror,-Wimplicit-function-declaration] drm_edp_backlight_disable(p->aux, &bl->info); ^ drivers/gpu/drm/panel/panel-simple.c:352:3: note: did you mean 'backlight_disable'? include/linux/backlight.h:379:19: note: 'backlight_disable' declared here static inline int backlight_disable(struct backlight_device *bd) ^ >> drivers/gpu/drm/panel/panel-simple.c:352:32: error: no member named 'aux' in 'struct panel_simple' drm_edp_backlight_disable(p->aux, &bl->info); ~ ^ >> drivers/gpu/drm/panel/panel-simple.c:527:3: error: implicit declaration of function 'drm_edp_backlight_enable' [-Werror,-Wimplicit-function-declaration] drm_edp_backlight_enable(p->aux, &bl->info, ^ drivers/gpu/drm/panel/panel-simple.c:527:3: note: did you mean 'backlight_enable'? include/linux/backlight.h:363:19: note: 'backlight_enable' declared here static inline int backlight_enable(struct backlight_device *bd) ^ drivers/gpu/drm/panel/panel-simple.c:527:31: error: no member named 'aux' in 'struct panel_simple' drm_edp_backlight_enable(p->aux, &bl->info, ~ ^ >> drivers/gpu/drm/panel/panel-simple.c:598:9: error: implicit declaration of function 'drm_edp_backlight_set_level' [-Werror,-Wimplicit-function-declaration] return drm_edp_backlight_set_level(p->aux, &bl->info, bd->props.brightness); ^ drivers/gpu/drm/panel/panel-simple.c:598:40: error: no member named 'aux' in 'struct panel_simple' return drm_edp_backlight_set_level(p->aux, &bl->info, bd->props.brightness); ~ ^ >> drivers/gpu/drm/panel/panel-simple.c:611:14: error: use of undeclared identifier 'EDP_DISPLAY_CTL_CAP_SIZE' u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE]; ^ >> drivers/gpu/drm/panel/panel-simple.c:618:8: error: implicit declaration of function 'drm_dp_dpcd_read' [-Werror,-Wimplicit-function-declaration] ret = drm_dp_dpcd_read(panel->aux, DP_EDP_DPCD_REV, edp_dpcd, ^ drivers/gpu/drm/panel/panel-simple.c:618:32: error: no member named 'aux' in 'struct panel_simple' ret = drm_dp_dpcd_read(panel->aux, DP_EDP_DPCD_REV, edp_dpcd, ~~~~~ ^ >> drivers/gpu/drm/panel/panel-simple.c:618:37: error: use of undeclared identifier 'DP_EDP_DPCD_REV' ret = drm_dp_dpcd_read(panel->aux, DP_EDP_DPCD_REV, edp_dpcd, ^ drivers/gpu/drm/panel/panel-simple.c:619:11: error: use of undeclared identifier 'EDP_DISPLAY_CTL_CAP_SIZE' EDP_DISPLAY_CTL_CAP_SIZE); ^ >> drivers/gpu/drm/panel/panel-simple.c:623:8: error: implicit declaration of function 'drm_edp_backlight_init' [-Werror,-Wimplicit-function-declaration] ret = drm_edp_backlight_init(panel->aux, &bl->info, 0, edp_dpcd, ^ drivers/gpu/drm/panel/panel-simple.c:623:38: error: no member named 'aux' in 'struct panel_simple' ret = drm_edp_backlight_init(panel->aux, &bl->info, 0, edp_dpcd, ~~~~~ ^ drivers/gpu/drm/panel/panel-simple.c:871:15: error: no member named 'aux' in 'struct panel_simple' if (!panel->aux) { ~~~~~ ^ 15 errors generated. vim +185 drivers/gpu/drm/panel/panel-simple.c 182 183 struct edp_backlight { 184 struct backlight_device *dev; > 185 struct drm_edp_backlight_info info; 186 }; 187 188 struct panel_simple { 189 struct drm_panel base; 190 bool enabled; 191 bool no_hpd; 192 193 bool prepared; 194 195 ktime_t prepared_time; 196 ktime_t unprepared_time; 197 198 const struct panel_desc *desc; 199 200 struct regulator *supply; 201 struct i2c_adapter *ddc; 202 203 struct gpio_desc *enable_gpio; 204 struct gpio_desc *hpd_gpio; 205 206 struct edid *edid; 207 208 struct edp_backlight *edp_bl; 209 210 struct drm_display_mode override_mode; 211 212 enum drm_panel_orientation orientation; 213 }; 214 215 static inline struct panel_simple *to_panel_simple(struct drm_panel *panel) 216 { 217 return container_of(panel, struct panel_simple, base); 218 } 219 220 static unsigned int panel_simple_get_timings_modes(struct panel_simple *panel, 221 struct drm_connector *connector) 222 { 223 struct drm_display_mode *mode; 224 unsigned int i, num = 0; 225 226 for (i = 0; i < panel->desc->num_timings; i++) { 227 const struct display_timing *dt = &panel->desc->timings[i]; 228 struct videomode vm; 229 230 videomode_from_timing(dt, &vm); 231 mode = drm_mode_create(connector->dev); 232 if (!mode) { 233 dev_err(panel->base.dev, "failed to add mode %ux%u\n", 234 dt->hactive.typ, dt->vactive.typ); 235 continue; 236 } 237 238 drm_display_mode_from_videomode(&vm, mode); 239 240 mode->type |= DRM_MODE_TYPE_DRIVER; 241 242 if (panel->desc->num_timings == 1) 243 mode->type |= DRM_MODE_TYPE_PREFERRED; 244 245 drm_mode_probed_add(connector, mode); 246 num++; 247 } 248 249 return num; 250 } 251 252 static unsigned int panel_simple_get_display_modes(struct panel_simple *panel, 253 struct drm_connector *connector) 254 { 255 struct drm_display_mode *mode; 256 unsigned int i, num = 0; 257 258 for (i = 0; i < panel->desc->num_modes; i++) { 259 const struct drm_display_mode *m = &panel->desc->modes[i]; 260 261 mode = drm_mode_duplicate(connector->dev, m); 262 if (!mode) { 263 dev_err(panel->base.dev, "failed to add mode %ux%u@%u\n", 264 m->hdisplay, m->vdisplay, 265 drm_mode_vrefresh(m)); 266 continue; 267 } 268 269 mode->type |= DRM_MODE_TYPE_DRIVER; 270 271 if (panel->desc->num_modes == 1) 272 mode->type |= DRM_MODE_TYPE_PREFERRED; 273 274 drm_mode_set_name(mode); 275 276 drm_mode_probed_add(connector, mode); 277 num++; 278 } 279 280 return num; 281 } 282 283 static int panel_simple_get_non_edid_modes(struct panel_simple *panel, 284 struct drm_connector *connector) 285 { 286 struct drm_display_mode *mode; 287 bool has_override = panel->override_mode.type; 288 unsigned int num = 0; 289 290 if (!panel->desc) 291 return 0; 292 293 if (has_override) { 294 mode = drm_mode_duplicate(connector->dev, 295 &panel->override_mode); 296 if (mode) { 297 drm_mode_probed_add(connector, mode); 298 num = 1; 299 } else { 300 dev_err(panel->base.dev, "failed to add override mode\n"); 301 } 302 } 303 304 /* Only add timings if override was not there or failed to validate */ 305 if (num == 0 && panel->desc->num_timings) 306 num = panel_simple_get_timings_modes(panel, connector); 307 308 /* 309 * Only add fixed modes if timings/override added no mode. 310 * 311 * We should only ever have either the display timings specified 312 * or a fixed mode. Anything else is rather bogus. 313 */ 314 WARN_ON(panel->desc->num_timings && panel->desc->num_modes); 315 if (num == 0) 316 num = panel_simple_get_display_modes(panel, connector); 317 318 connector->display_info.bpc = panel->desc->bpc; 319 connector->display_info.width_mm = panel->desc->size.width; 320 connector->display_info.height_mm = panel->desc->size.height; 321 if (panel->desc->bus_format) 322 drm_display_info_set_bus_formats(&connector->display_info, 323 &panel->desc->bus_format, 1); 324 connector->display_info.bus_flags = panel->desc->bus_flags; 325 326 return num; 327 } 328 329 static void panel_simple_wait(ktime_t start_ktime, unsigned int min_ms) 330 { 331 ktime_t now_ktime, min_ktime; 332 333 if (!min_ms) 334 return; 335 336 min_ktime = ktime_add(start_ktime, ms_to_ktime(min_ms)); 337 now_ktime = ktime_get(); 338 339 if (ktime_before(now_ktime, min_ktime)) 340 msleep(ktime_to_ms(ktime_sub(min_ktime, now_ktime)) + 1); 341 } 342 343 static int panel_simple_disable(struct drm_panel *panel) 344 { 345 struct panel_simple *p = to_panel_simple(panel); 346 struct edp_backlight *bl = p->edp_bl; 347 348 if (!p->enabled) 349 return 0; 350 351 if (p->desc->uses_dpcd_backlight && bl) > 352 drm_edp_backlight_disable(p->aux, &bl->info); 353 354 if (p->desc->delay.disable) 355 msleep(p->desc->delay.disable); 356 357 p->enabled = false; 358 359 return 0; 360 } 361 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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