Hi Maxime, I love your patch! Perhaps something to improve: [auto build test WARNING on ] url: https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-panel-Add-Ilitek-ILI9881c-controller-driver/20180505-104031 base: config: sh-allmodconfig (attached as .config) compiler: sh4-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=sh All warnings (new ones prefixed by >>): drivers/gpu/drm/panel/panel-ilitek-ili9881c.c: In function 'ili9881c_prepare': >> drivers/gpu/drm/panel/panel-ilitek-ili9881c.c:303:34: warning: initialization discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] struct ili9881c_instr *instr = &ili9881c_init[i]; ^ vim +/const +303 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c 284 285 static int ili9881c_prepare(struct drm_panel *panel) 286 { 287 struct ili9881c *ctx = panel_to_ili9881c(panel); 288 unsigned int i; 289 int ret; 290 291 /* Power the panel */ 292 gpiod_set_value(ctx->power, 1); 293 msleep(5); 294 295 /* And reset it */ 296 gpiod_set_value(ctx->reset, 1); 297 msleep(20); 298 299 gpiod_set_value(ctx->reset, 0); 300 msleep(20); 301 302 for (i = 0; i < ARRAY_SIZE(ili9881c_init); i++) { > 303 struct ili9881c_instr *instr = &ili9881c_init[i]; 304 305 if (instr->op == ILI9881C_SWITCH_PAGE) 306 ret = ili9881c_switch_page(ctx, instr->arg.page); 307 else if (instr->op == ILI9881C_COMMAND) 308 ret = ili9881c_send_cmd_data(ctx, instr->arg.cmd.cmd, 309 instr->arg.cmd.data); 310 311 if (ret) 312 return ret; 313 } 314 315 ret = ili9881c_switch_page(ctx, 0); 316 if (ret) 317 return ret; 318 319 ret = mipi_dsi_dcs_set_tear_on(ctx->dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK); 320 if (ret) 321 return ret; 322 323 mipi_dsi_dcs_exit_sleep_mode(ctx->dsi); 324 if (ret) 325 return ret; 326 327 return 0; 328 } 329 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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