Hi Jitao, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [cannot apply to v5.4-rc6 next-20191108] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Jitao-Shi/drm-mediatek-fine-tune-the-dsi-panel-s-power-sequence/20191108-202844 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 847120f859cc45e074204f4cf33c8df069306eb2 config: arm-allmodconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0 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 GCC_VERSION=7.4.0 make.cross ARCH=arm If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/gpu/drm/mediatek/mtk_dsi.c: In function 'mtk_dsi_poweron': >> drivers/gpu/drm/mediatek/mtk_dsi.c:567:7: error: implicit declaration of function 'drm_panel_prepare_power'; did you mean 'drm_panel_prepare'? [-Werror=implicit-function-declaration] if (drm_panel_prepare_power(dsi->panel)) ^~~~~~~~~~~~~~~~~~~~~~~ drm_panel_prepare >> drivers/gpu/drm/mediatek/mtk_dsi.c:622:7: error: implicit declaration of function 'drm_panel_unprepare_power'; did you mean 'drm_panel_unprepare'? [-Werror=implicit-function-declaration] if (drm_panel_unprepare_power(dsi->panel)) ^~~~~~~~~~~~~~~~~~~~~~~~~ drm_panel_unprepare cc1: some warnings being treated as errors vim +567 drivers/gpu/drm/mediatek/mtk_dsi.c 522 523 static int mtk_dsi_poweron(struct mtk_dsi *dsi) 524 { 525 struct device *dev = dsi->dev; 526 int ret; 527 u64 pixel_clock, total_bits; 528 u32 htotal, htotal_bits, bit_per_pixel, overhead_cycles, overhead_bits; 529 530 if (++dsi->refcount != 1) 531 return 0; 532 533 switch (dsi->format) { 534 case MIPI_DSI_FMT_RGB565: 535 bit_per_pixel = 16; 536 break; 537 case MIPI_DSI_FMT_RGB666_PACKED: 538 bit_per_pixel = 18; 539 break; 540 case MIPI_DSI_FMT_RGB666: 541 case MIPI_DSI_FMT_RGB888: 542 default: 543 bit_per_pixel = 24; 544 break; 545 } 546 547 /** 548 * htotal_time = htotal * byte_per_pixel / num_lanes 549 * overhead_time = lpx + hs_prepare + hs_zero + hs_trail + hs_exit 550 * mipi_ratio = (htotal_time + overhead_time) / htotal_time 551 * data_rate = pixel_clock * bit_per_pixel * mipi_ratio / num_lanes; 552 */ 553 pixel_clock = dsi->vm.pixelclock; 554 htotal = dsi->vm.hactive + dsi->vm.hback_porch + dsi->vm.hfront_porch + 555 dsi->vm.hsync_len; 556 htotal_bits = htotal * bit_per_pixel; 557 558 overhead_cycles = T_LPX + T_HS_PREP + T_HS_ZERO + T_HS_TRAIL + 559 T_HS_EXIT; 560 overhead_bits = overhead_cycles * dsi->lanes * 8; 561 total_bits = htotal_bits + overhead_bits; 562 563 dsi->data_rate = DIV_ROUND_UP_ULL(pixel_clock * total_bits, 564 htotal * dsi->lanes); 565 566 if (dsi->panel) { > 567 if (drm_panel_prepare_power(dsi->panel)) 568 DRM_INFO("can't prepare power the panel\n"); 569 } 570 571 ret = clk_set_rate(dsi->hs_clk, dsi->data_rate); 572 if (ret < 0) { 573 dev_err(dev, "Failed to set data rate: %d\n", ret); 574 goto err_prepare_power; 575 } 576 577 phy_power_on(dsi->phy); 578 579 ret = clk_prepare_enable(dsi->engine_clk); 580 if (ret < 0) { 581 dev_err(dev, "Failed to enable engine clock: %d\n", ret); 582 goto err_phy_power_off; 583 } 584 585 ret = clk_prepare_enable(dsi->digital_clk); 586 if (ret < 0) { 587 dev_err(dev, "Failed to enable digital clock: %d\n", ret); 588 goto err_disable_engine_clk; 589 } 590 591 mtk_dsi_enable(dsi); 592 mtk_dsi_reset_engine(dsi); 593 mtk_dsi_phy_timconfig(dsi); 594 595 mtk_dsi_rxtx_control(dsi); 596 mtk_dsi_ps_control_vact(dsi); 597 mtk_dsi_set_vm_cmd(dsi); 598 mtk_dsi_config_vdo_timing(dsi); 599 mtk_dsi_set_interrupt_enable(dsi); 600 601 mtk_dsi_clk_ulp_mode_leave(dsi); 602 mtk_dsi_lane0_ulp_mode_leave(dsi); 603 mtk_dsi_clk_hs_mode(dsi, 0); 604 605 if (dsi->panel) { 606 if (drm_panel_prepare(dsi->panel)) { 607 DRM_ERROR("failed to prepare the panel\n"); 608 goto err_disable_digital_clk; 609 } 610 } 611 612 return 0; 613 614 err_disable_digital_clk: 615 clk_disable_unprepare(dsi->digital_clk); 616 err_disable_engine_clk: 617 clk_disable_unprepare(dsi->engine_clk); 618 err_phy_power_off: 619 phy_power_off(dsi->phy); 620 err_prepare_power: 621 if (dsi->panel) { > 622 if (drm_panel_unprepare_power(dsi->panel)) 623 DRM_INFO("Can't unprepare power the panel\n"); 624 } 625 dsi->refcount--; 626 return ret; 627 } 628 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation
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