[superna9999:amlogic/v5.9/s400-mipi-dsi 12/16] drivers/gpu/drm/drm_bridge.c:181:43: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_encoder

[kernel test robot <lkp@intel.com>]

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tree:   https://github.com/superna9999/linux amlogic/v5.9/s400-mipi-dsi
head:   4cbe7065356e7e68a59a0787bc4a4a3ca9375065
commit: 87c65f7a5406d7484a6e9aeab87b275f29542aed [12/16] drm: bridge: debug
config: x86_64-randconfig-a001-20200731 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c23ae3f18ee3ff11671f4c62ffc66d150b1bcdc2)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout 87c65f7a5406d7484a6e9aeab87b275f29542aed
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/drm_bridge.c:181:43: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_encoder *' [-Wformat]
           pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
                       ~~~~                         ^~~~~~~
   include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
           printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
                                   ~~~     ^~~~~~~~~~~
>> drivers/gpu/drm/drm_bridge.c:181:52: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_bridge *' [-Wformat]
           pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
                            ~~~~                             ^~~~~~
   include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
           printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
                                   ~~~     ^~~~~~~~~~~
   drivers/gpu/drm/drm_bridge.c:181:60: warning: format specifies type 'unsigned int' but the argument has type 'struct drm_bridge *' [-Wformat]
           pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
                                 ~~~~                                ^~~~~~~~
   include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
           printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
                                   ~~~     ^~~~~~~~~~~
>> drivers/gpu/drm/drm_bridge.c:201:45: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
                   pr_info("%s:%d %d\n", __func__, __LINE__, ret);
                                                             ^~~
   include/linux/printk.h:368:34: note: expanded from macro 'pr_info'
           printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
                                           ^~~~~~~~~~~
   drivers/gpu/drm/drm_bridge.c:179:9: note: initialize the variable 'ret' to silence this warning
           int ret;
                  ^
                   = 0
   4 warnings generated.

vim +181 drivers/gpu/drm/drm_bridge.c

   151	
   152	/**
   153	 * drm_bridge_attach - attach the bridge to an encoder's chain
   154	 *
   155	 * @encoder: DRM encoder
   156	 * @bridge: bridge to attach
   157	 * @previous: previous bridge in the chain (optional)
   158	 * @flags: DRM_BRIDGE_ATTACH_* flags
   159	 *
   160	 * Called by a kms driver to link the bridge to an encoder's chain. The previous
   161	 * argument specifies the previous bridge in the chain. If NULL, the bridge is
   162	 * linked directly at the encoder's output. Otherwise it is linked at the
   163	 * previous bridge's output.
   164	 *
   165	 * If non-NULL the previous bridge must be already attached by a call to this
   166	 * function.
   167	 *
   168	 * Note that bridges attached to encoders are auto-detached during encoder
   169	 * cleanup in drm_encoder_cleanup(), so drm_bridge_attach() should generally
   170	 * *not* be balanced with a drm_bridge_detach() in driver code.
   171	 *
   172	 * RETURNS:
   173	 * Zero on success, error code on failure
   174	 */
   175	int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
   176			      struct drm_bridge *previous,
   177			      enum drm_bridge_attach_flags flags)
   178	{
   179		int ret;
   180	
 > 181		pr_info("%s %08x %08x %08x\n", __func__, encoder, bridge, previous);
   182	
   183		if (!encoder || !bridge)
   184			return -EINVAL;
   185	
   186		if (previous && (!previous->dev || previous->encoder != encoder))
   187			return -EINVAL;
   188	
   189		if (bridge->dev)
   190			return -EBUSY;
   191	
   192		bridge->dev = encoder->dev;
   193		bridge->encoder = encoder;
   194	
   195		if (previous)
   196			list_add(&bridge->chain_node, &previous->chain_node);
   197		else
   198			list_add(&bridge->chain_node, &encoder->bridge_chain);
   199	
   200		if (bridge->funcs->attach) {
 > 201			pr_info("%s:%d %d\n", __func__, __LINE__, ret);
   202			ret = bridge->funcs->attach(bridge, flags);
   203			if (ret < 0)
   204				goto err_reset_bridge;
   205		}
   206	
   207		if (bridge->funcs->atomic_reset) {
   208			struct drm_bridge_state *state;
   209	
   210			state = bridge->funcs->atomic_reset(bridge);
   211			if (IS_ERR(state)) {
   212				ret = PTR_ERR(state);
   213				goto err_detach_bridge;
   214			}
   215	
   216			drm_atomic_private_obj_init(bridge->dev, &bridge->base,
   217						    &state->base,
   218						    &drm_bridge_priv_state_funcs);
   219		}
   220	
   221		return 0;
   222	
   223	err_detach_bridge:
   224		if (bridge->funcs->detach)
   225			bridge->funcs->detach(bridge);
   226	
   227	err_reset_bridge:
   228		bridge->dev = NULL;
   229		bridge->encoder = NULL;
   230		list_del(&bridge->chain_node);
   231		return ret;
   232	}
   233	EXPORT_SYMBOL(drm_bridge_attach);
   234	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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