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Subject[pinchartl-media:drm/du/next 13/14] drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:614:6: warning: no previous prototype for 'rcar_mipi_dsi_pclk_enable'
tree:   git://linuxtv.org/pinchartl/media.git drm/du/next
head: 1a1ef49313becc3127e3bd2b6cdb27e5fc54f761
commit: 81c238208c6accde5592851b101986b8b91ec859 [13/14] drm: rcar-du: Fix DSI enable & disable sequence
config: arc-randconfig-r043-20220828 (https://download.01.org/0day-ci/archive/20220829/202208291831.Xfw1ORoE-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 12.1.0
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
git remote add pinchartl-media git://linuxtv.org/pinchartl/media.git
git fetch --no-tags pinchartl-media drm/du/next
git checkout 81c238208c6accde5592851b101986b8b91ec859
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/rcar-du/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:614:6: warning: no previous prototype for 'rcar_mipi_dsi_pclk_enable' [-Wmissing-prototypes]
614 | void rcar_mipi_dsi_pclk_enable(struct drm_bridge *bridge,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c:653:6: warning: no previous prototype for 'rcar_mipi_dsi_pclk_disable' [-Wmissing-prototypes]
653 | void rcar_mipi_dsi_pclk_disable(struct drm_bridge *bridge)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/rcar_mipi_dsi_pclk_enable +614 drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c

613
> 614 void rcar_mipi_dsi_pclk_enable(struct drm_bridge *bridge,
615 struct drm_atomic_state *state)
616 {
617 struct rcar_mipi_dsi *dsi = bridge_to_rcar_mipi_dsi(bridge);
618 const struct drm_display_mode *mode;
619 struct drm_connector *connector;
620 struct drm_crtc *crtc;
621 int ret;
622
623 connector = drm_atomic_get_new_connector_for_encoder(state,
624 bridge->encoder);
625 crtc = drm_atomic_get_new_connector_state(state, connector)->crtc;
626 mode = &drm_atomic_get_new_crtc_state(state, crtc)->adjusted_mode;
627
628 ret = rcar_mipi_dsi_clk_enable(dsi);
629 if (ret < 0) {
630 dev_err(dsi->dev, "failed to enable DSI clocks\n");
631 return;
632 }
633
634 ret = rcar_mipi_dsi_startup(dsi, mode);
635 if (ret < 0)
636 goto err_dsi_startup;
637
638 rcar_mipi_dsi_set_display_timing(dsi, mode);
639
640 ret = rcar_mipi_dsi_start_hs_clock(dsi);
641 if (ret < 0)
642 goto err_dsi_start_hs;
643
644 return;
645
646 err_dsi_start_hs:
647 rcar_mipi_dsi_shutdown(dsi);
648 err_dsi_startup:
649 rcar_mipi_dsi_clk_disable(dsi);
650 }
651 EXPORT_SYMBOL_GPL(rcar_mipi_dsi_pclk_enable);
652
> 653 void rcar_mipi_dsi_pclk_disable(struct drm_bridge *bridge)
654 {
655 struct rcar_mipi_dsi *dsi = bridge_to_rcar_mipi_dsi(bridge);
656
657 rcar_mipi_dsi_shutdown(dsi);
658 rcar_mipi_dsi_clk_disable(dsi);
659 }
660 EXPORT_SYMBOL_GPL(rcar_mipi_dsi_pclk_disable);
661

--
0-DAY CI Kernel Test Service
https://01.org/lkp

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