[PATCH] drm/ast: Fix long time waiting on s3/s4 resume

[kernel test robot]

Hi Jammy,

kernel test robot noticed the following build errors:

[auto build test ERROR on e62252bc55b6d4eddc6c2bdbf95a448180d6a08d]

url:    https://github.com/intel-lab-lkp/linux/commits/Jammy-Huang/drm-ast-Fix-long-time-waiting-on-s3-s4-resume/20230414-091312
base:   e62252bc55b6d4eddc6c2bdbf95a448180d6a08d
patch link:    https://lore.kernel.org/r/20230414011147.3858-1-jammy_huang%40aspeedtech.com
patch subject: [PATCH] drm/ast: Fix long time waiting on s3/s4 resume
config: ia64-allyesconfig (https://download.01.org/0day-ci/archive/20230414/202304141155.Hsgy2cN0-lkp@intel.com/config)
compiler: ia64-linux-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
        # https://github.com/intel-lab-lkp/linux/commit/120de3fe25a450d9918de8bc73a4fe079bc71d9c
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Jammy-Huang/drm-ast-Fix-long-time-waiting-on-s3-s4-resume/20230414-091312
        git checkout 120de3fe25a450d9918de8bc73a4fe079bc71d9c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/gpu/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp at intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304141155.Hsgy2cN0-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/ast/ast_dp.c:122:6: error: conflicting types for 'ast_dp_launch'; have 'void(struct drm_device *, u8)' {aka 'void(struct drm_device *, unsigned char)'}
     122 | void ast_dp_launch(struct drm_device *dev, u8 bPower)
         |      ^~~~~~~~~~~~~
   In file included from drivers/gpu/drm/ast/ast_dp.c:8:
   drivers/gpu/drm/ast/ast_drv.h:501:6: note: previous declaration of 'ast_dp_launch' with type 'void(struct drm_device *)'
     501 | void ast_dp_launch(struct drm_device *dev);
         |      ^~~~~~~~~~~~~


vim +122 drivers/gpu/drm/ast/ast_dp.c

594e9c04b5864b KuoHsiang Chou    2022-04-28  118  
594e9c04b5864b KuoHsiang Chou    2022-04-28  119  /*
594e9c04b5864b KuoHsiang Chou    2022-04-28  120   * Launch Aspeed DP
594e9c04b5864b KuoHsiang Chou    2022-04-28  121   */
594e9c04b5864b KuoHsiang Chou    2022-04-28 @122  void ast_dp_launch(struct drm_device *dev, u8 bPower)
594e9c04b5864b KuoHsiang Chou    2022-04-28  123  {
120de3fe25a450 Jammy Huang       2023-04-14  124  	u32 i = 0;
594e9c04b5864b KuoHsiang Chou    2022-04-28  125  	u8 bDPExecute = 1;
594e9c04b5864b KuoHsiang Chou    2022-04-28  126  	struct ast_private *ast = to_ast_private(dev);
594e9c04b5864b KuoHsiang Chou    2022-04-28  127  
594e9c04b5864b KuoHsiang Chou    2022-04-28  128  	// Wait one second then timeout.
594e9c04b5864b KuoHsiang Chou    2022-04-28  129  	while (ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xD1, COPROCESSOR_LAUNCH) !=
594e9c04b5864b KuoHsiang Chou    2022-04-28  130  		COPROCESSOR_LAUNCH) {
594e9c04b5864b KuoHsiang Chou    2022-04-28  131  		i++;
594e9c04b5864b KuoHsiang Chou    2022-04-28  132  		// wait 100 ms
594e9c04b5864b KuoHsiang Chou    2022-04-28  133  		msleep(100);
594e9c04b5864b KuoHsiang Chou    2022-04-28  134  
594e9c04b5864b KuoHsiang Chou    2022-04-28  135  		if (i >= 10) {
594e9c04b5864b KuoHsiang Chou    2022-04-28  136  			// DP would not be ready.
594e9c04b5864b KuoHsiang Chou    2022-04-28  137  			bDPExecute = 0;
594e9c04b5864b KuoHsiang Chou    2022-04-28  138  			break;
594e9c04b5864b KuoHsiang Chou    2022-04-28  139  		}
594e9c04b5864b KuoHsiang Chou    2022-04-28  140  	}
594e9c04b5864b KuoHsiang Chou    2022-04-28  141  
120de3fe25a450 Jammy Huang       2023-04-14  142  	if (!bDPExecute)
120de3fe25a450 Jammy Huang       2023-04-14  143  		drm_err(dev, "Wait DPMCU executing timeout\n");
594e9c04b5864b KuoHsiang Chou    2022-04-28  144  
594e9c04b5864b KuoHsiang Chou    2022-04-28  145  	ast_set_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xE5,
594e9c04b5864b KuoHsiang Chou    2022-04-28  146  			       (u8) ~ASTDP_HOST_EDID_READ_DONE_MASK,
594e9c04b5864b KuoHsiang Chou    2022-04-28  147  			       ASTDP_HOST_EDID_READ_DONE);
7f35680ada234c Thomas Zimmermann 2022-06-07  148  }
594e9c04b5864b KuoHsiang Chou    2022-04-28  149  

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