Hi, kernel test robot noticed the following build warnings:
[auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on drm/drm-next drm-exynos/exynos-drm-next drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.8 next-20240315] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/sunpeng-li-amd-com/drm-amd-display-Introduce-overlay-cursor-mode/20240316-011404 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20240315170959.165505-2-sunpeng.li%40amd.com patch subject: [PATCH 1/2] drm/amd/display: Introduce overlay cursor mode config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20240316/202403161600.6kspdesj-...@intel.com/config) compiler: loongarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240316/202403161600.6kspdesj-...@intel.com/reproduce) 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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202403161600.6kspdesj-...@intel.com/ All warnings (new ones prefixed by >>): >> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:10639: warning: >> This comment starts with '/**', but isn't a kernel-doc comment. Refer >> Documentation/doc-guide/kernel-doc.rst * Set whether the cursor should be enabled in native mode, or overlay mode, on vim +10639 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c 10637 10638 /** 10639 * Set whether the cursor should be enabled in native mode, or overlay mode, on 10640 * the dm_crtc_state. 10641 * 10642 * The cursor should be enabled in overlay mode if the immediate underlying 10643 * plane contains a video format. 10644 * 10645 * Since zpos info is required, drm_atomic_normalize_zpos must be called before 10646 * calling this function. 10647 */ 10648 static int dm_crtc_set_cursor_mode(struct drm_atomic_state *state, 10649 struct dm_crtc_state *dm_crtc_state) 10650 { 10651 struct drm_plane_state *plane_state, *old_plane_state, *target_plane_state; 10652 struct drm_crtc_state *crtc_state = &dm_crtc_state->base; 10653 struct drm_plane *plane; 10654 bool consider_mode_change = false; 10655 bool cursor_changed = false; 10656 unsigned int target_zpos; 10657 unsigned int cursor_zpos; 10658 int i; 10659 10660 /* 10661 * Cursor mode can change if a plane's format changes, is 10662 * enabled/disabled, or z-order changes. 10663 */ 10664 for_each_oldnew_plane_in_state(state, plane, old_plane_state, plane_state, i) { 10665 10666 /* Only care about planes on this CRTC */ 10667 if ((drm_plane_mask(plane) & crtc_state->plane_mask) == 0) 10668 continue; 10669 10670 if (plane->type == DRM_PLANE_TYPE_CURSOR) 10671 cursor_changed = true; 10672 10673 if (drm_atomic_plane_enabling(old_plane_state, plane_state) || 10674 drm_atomic_plane_disabling(old_plane_state, plane_state) || 10675 old_plane_state->fb->format != plane_state->fb->format) { 10676 consider_mode_change = true; 10677 break; 10678 } 10679 } 10680 10681 if (!consider_mode_change && !crtc_state->zpos_changed) { 10682 return 0; 10683 } 10684 10685 /* 10686 * If no cursor change on this CRTC, and not enabled on this CRTC, then 10687 * no need to set cursor mode. This avoids needlessly locking the cursor 10688 * state. 10689 */ 10690 if (!cursor_changed && 10691 !(drm_plane_mask(crtc_state->crtc->cursor) & crtc_state->plane_mask)) { 10692 return 0; 10693 } 10694 10695 plane_state = drm_atomic_get_plane_state(state, 10696 crtc_state->crtc->cursor); 10697 if (IS_ERR(plane_state)) 10698 return PTR_ERR(plane_state); 10699 10700 /* Cursor is disabled */ 10701 if (!plane_state->fb) 10702 return 0; 10703 10704 cursor_zpos = plane_state->normalized_zpos; 10705 10706 /* Get enabled plane immediately below cursor. */ 10707 target_plane_state = NULL; 10708 target_zpos = 0; 10709 drm_for_each_plane_mask(plane, state->dev, crtc_state->plane_mask) { 10710 if (plane->type == DRM_PLANE_TYPE_CURSOR) 10711 continue; 10712 10713 plane_state = drm_atomic_get_plane_state(state, plane); 10714 if (IS_ERR(plane_state)) 10715 return PTR_ERR(plane_state); 10716 10717 if (!plane_state->fb || 10718 plane_state->normalized_zpos >= cursor_zpos) 10719 continue; 10720 10721 if (plane_state->normalized_zpos >= target_zpos) { 10722 target_zpos = plane_state->normalized_zpos; 10723 target_plane_state = plane_state; 10724 } 10725 } 10726 10727 /* Nothing below cursor - use overlay mode */ 10728 if (target_plane_state == NULL) { 10729 dm_crtc_state->cursor_mode = DM_CURSOR_OVERLAY_MODE; 10730 return 0; 10731 } 10732 10733 if (amdgpu_dm_plane_is_video_format(target_plane_state->fb->format->format)) { 10734 dm_crtc_state->cursor_mode = DM_CURSOR_OVERLAY_MODE; 10735 } else { 10736 dm_crtc_state->cursor_mode = DM_CURSOR_NATIVE_MODE; 10737 } 10738 10739 return 0; 10740 } 10741 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
