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Date:   Sun, 27 Jun 2021 12:14:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sung Lee <sung.lee@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Yongqiang Sun <yongqiang.sun@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:97:6:
 warning: no previous prototype for 'rn_set_low_power_state'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   625acffd7ae2c52898d249e6c5c39f348db0d8df
commit: d2ce14fd99e91f3de667e5dba5b9affa3e40e725 drm/amd/display: Send DISPLAY_OFF after power down on boot
date:   10 months ago
config: i386-randconfig-r024-20210627 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d2ce14fd99e91f3de667e5dba5b9affa3e40e725
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout d2ce14fd99e91f3de667e5dba5b9affa3e40e725
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:58:5: warning: no previous prototype for 'rn_get_active_display_cnt_wa' [-Wmissing-prototypes]
      58 | int rn_get_active_display_cnt_wa(
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:97:6: warning: no previous prototype for 'rn_set_low_power_state' [-Wmissing-prototypes]
      97 | void rn_set_low_power_state(struct clk_mgr *clk_mgr_base)
         |      ^~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:106:6: warning: no previous prototype for 'rn_update_clocks' [-Wmissing-prototypes]
     106 | void rn_update_clocks(struct clk_mgr *clk_mgr_base,
         |      ^~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:388:6: warning: no previous prototype for 'rn_get_clk_states' [-Wmissing-prototypes]
     388 | void rn_get_clk_states(struct clk_mgr *clk_mgr_base, struct clk_states *s)
         |      ^~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:398:6: warning: no previous prototype for 'rn_enable_pme_wa' [-Wmissing-prototypes]
     398 | void rn_enable_pme_wa(struct clk_mgr *clk_mgr_base)
         |      ^~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:405:6: warning: no previous prototype for 'rn_init_clocks' [-Wmissing-prototypes]
     405 | void rn_init_clocks(struct clk_mgr *clk_mgr)
         |      ^~~~~~~~~~~~~~
   In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:43:
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:226:29: warning: 'UVD0_BASE' defined but not used [-Wunused-const-variable=]
     226 | static const struct IP_BASE UVD0_BASE ={ { { { 0x00007800, 0x00007E00, 0x02403000, 0, 0 } },
         |                             ^~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:219:29: warning: 'USB0_BASE' defined but not used [-Wunused-const-variable=]
     219 | static const struct IP_BASE USB0_BASE ={ { { { 0x0242A800, 0x05B00000, 0, 0, 0 } },
         |                             ^~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:212:29: warning: 'UMC_BASE' defined but not used [-Wunused-const-variable=]
     212 | static const struct IP_BASE UMC_BASE ={ { { { 0x00014000, 0x02425800, 0, 0, 0 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:205:29: warning: 'THM_BASE' defined but not used [-Wunused-const-variable=]
     205 | static const struct IP_BASE THM_BASE ={ { { { 0x00016600, 0x02400C00, 0, 0, 0 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:198:29: warning: 'SMUIO_BASE' defined but not used [-Wunused-const-variable=]
     198 | static const struct IP_BASE SMUIO_BASE ={ { { { 0x00016800, 0x00016A00, 0x02401000, 0x00440000, 0 } },
         |                             ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:191:29: warning: 'SDMA0_BASE' defined but not used [-Wunused-const-variable=]
     191 | static const struct IP_BASE SDMA0_BASE ={ { { { 0x00001260, 0x0240A800, 0, 0, 0 } },
         |                             ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:184:29: warning: 'PCIE0_BASE' defined but not used [-Wunused-const-variable=]
     184 | static const struct IP_BASE PCIE0_BASE ={ { { { 0x02411800, 0x04440000, 0, 0, 0 } },
         |                             ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:177:29: warning: 'OSSSYS_BASE' defined but not used [-Wunused-const-variable=]
     177 | static const struct IP_BASE OSSSYS_BASE ={ { { { 0x000010A0, 0x0240A000, 0, 0, 0 } },
         |                             ^~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:172:29: warning: 'DCN_BASE' defined but not used [-Wunused-const-variable=]
     172 | static const struct IP_BASE DCN_BASE   ={ { { { 0x00000012, 0x000000C0, 0x000034C0, 0, 0 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:165:29: warning: 'NBIF0_BASE' defined but not used [-Wunused-const-variable=]
     165 | static const struct IP_BASE NBIF0_BASE ={ { { { 0x00000000, 0x00000014, 0x00000D20, 0x00010400, 0x0241B000 } },
         |                             ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:158:29: warning: 'MP1_BASE' defined but not used [-Wunused-const-variable=]
     158 | static const struct IP_BASE MP1_BASE ={ { { { 0x00016000, 0x02400400, 0x00E80000, 0x00EC0000, 0x00F00000 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:151:29: warning: 'MP0_BASE' defined but not used [-Wunused-const-variable=]
     151 | static const struct IP_BASE MP0_BASE ={ { { { 0x00016000, 0x0243FC00, 0x00DC0000, 0x00E00000, 0x00E40000 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:144:29: warning: 'MMHUB_BASE' defined but not used [-Wunused-const-variable=]
     144 | static const struct IP_BASE MMHUB_BASE ={ { { { 0x0001A000, 0x02408800, 0, 0, 0 } },
         |                             ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:137:29: warning: 'L2IMU0_BASE' defined but not used [-Wunused-const-variable=]
     137 | static const struct IP_BASE L2IMU0_BASE ={ { { { 0x00007DC0, 0x02407000, 0x00900000, 0x04FC0000, 0x055C0000 } },
         |                             ^~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:130:29: warning: 'ISP_BASE' defined but not used [-Wunused-const-variable=]
     130 | static const struct IP_BASE ISP_BASE ={ { { { 0x00018000, 0x0240B000, 0, 0, 0 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:123:29: warning: 'IOHC0_BASE' defined but not used [-Wunused-const-variable=]
     123 | static const struct IP_BASE IOHC0_BASE ={ { { { 0x00010000, 0x02406000, 0x04EC0000, 0, 0 } },
         |                             ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:116:29: warning: 'HDP_BASE' defined but not used [-Wunused-const-variable=]
     116 | static const struct IP_BASE HDP_BASE ={ { { { 0x00000F20, 0x0240A400, 0, 0, 0 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:109:29: warning: 'HDA_BASE' defined but not used [-Wunused-const-variable=]
     109 | static const struct IP_BASE HDA_BASE ={ { { { 0x02404800, 0x004C0000, 0, 0, 0 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:102:29: warning: 'GC_BASE' defined but not used [-Wunused-const-variable=]
     102 | static const struct IP_BASE GC_BASE ={ { { { 0x00002000, 0x0000A000, 0x02402C00, 0, 0 } },
         |                             ^~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:95:29: warning: 'FUSE_BASE' defined but not used [-Wunused-const-variable=]
      95 | static const struct IP_BASE FUSE_BASE ={ { { { 0x00017400, 0x02401400, 0, 0, 0 } },
         |                             ^~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:88:29: warning: 'DPCS_BASE' defined but not used [-Wunused-const-variable=]
      88 | static const struct IP_BASE DPCS_BASE ={ { { { 0x00000012, 0x000000C0, 0x000034C0, 0x00009000, 0x02403C00 } },
         |                             ^~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:81:29: warning: 'DMU_BASE' defined but not used [-Wunused-const-variable=]
      81 | static const struct IP_BASE DMU_BASE ={ { { { 0x00000012, 0x000000C0, 0x000034C0, 0x00009000, 0x02403C00 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:74:29: warning: 'DIO_BASE' defined but not used [-Wunused-const-variable=]
      74 | static const struct IP_BASE DIO_BASE ={ { { { 0x02404000, 0, 0, 0, 0 } },
         |                             ^~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:67:29: warning: 'DF_BASE' defined but not used [-Wunused-const-variable=]
      67 | static const struct IP_BASE DF_BASE ={ { { { 0x00007000, 0x0240B800, 0, 0, 0 } },
         |                             ^~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:60:29: warning: 'DBGU_IO0_BASE' defined but not used [-Wunused-const-variable=]
      60 | static const struct IP_BASE DBGU_IO0_BASE ={ { { { 0x000001E0, 0x0240B400, 0, 0, 0 } },
         |                             ^~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:46:29: warning: 'ATHUB_BASE' defined but not used [-Wunused-const-variable=]
      46 | static const struct IP_BASE ATHUB_BASE ={ { { { 0x00000C20, 0x02408C00, 0, 0, 0 } },
         |                             ^~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/../include/renoir_ip_offset.h:39:29: warning: 'ACP_BASE' defined but not used [-Wunused-const-variable=]
      39 | static const struct IP_BASE ACP_BASE ={ { { { 0x02403800, 0x00480000, 0, 0, 0 } },
         |                             ^~~~~~~~
   In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_types.h:86,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/resource.h:28,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/hw/clk_mgr_internal.h:36,
                    from drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c:27:


vim +/rn_set_low_power_state +97 drivers/gpu/drm/amd/amdgpu/../display/dc/clk_mgr/dcn21/rn_clk_mgr.c

    52	
    53	#define REG(reg_name) \
    54		(CLK_BASE.instance[0].segment[mm ## reg_name ## _BASE_IDX] + mm ## reg_name)
    55	
    56	
    57	/* TODO: evaluate how to lower or disable all dcn clocks in screen off case */
  > 58	int rn_get_active_display_cnt_wa(
    59			struct dc *dc,
    60			struct dc_state *context)
    61	{
    62		int i, display_count;
    63		bool tmds_present = false;
    64	
    65		display_count = 0;
    66		for (i = 0; i < context->stream_count; i++) {
    67			const struct dc_stream_state *stream = context->streams[i];
    68	
    69			if (stream->signal == SIGNAL_TYPE_HDMI_TYPE_A ||
    70					stream->signal == SIGNAL_TYPE_DVI_SINGLE_LINK ||
    71					stream->signal == SIGNAL_TYPE_DVI_DUAL_LINK)
    72				tmds_present = true;
    73		}
    74	
    75		for (i = 0; i < dc->link_count; i++) {
    76			const struct dc_link *link = dc->links[i];
    77	
    78			/*
    79			 * Only notify active stream or virtual stream.
    80			 * Need to notify virtual stream to work around
    81			 * headless case. HPD does not fire when system is in
    82			 * S0i2.
    83			 */
    84			/* abusing the fact that the dig and phy are coupled to see if the phy is enabled */
    85			if (link->connector_signal == SIGNAL_TYPE_VIRTUAL ||
    86					link->link_enc->funcs->is_dig_enabled(link->link_enc))
    87				display_count++;
    88		}
    89	
    90		/* WA for hang on HDMI after display off back back on*/
    91		if (display_count == 0 && tmds_present)
    92			display_count = 1;
    93	
    94		return display_count;
    95	}
    96	
  > 97	void rn_set_low_power_state(struct clk_mgr *clk_mgr_base)
    98	{
    99		struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
   100	
   101		rn_vbios_smu_set_dcn_low_power_state(clk_mgr, DCN_PWR_STATE_LOW_POWER);
   102		/* update power state */
   103		clk_mgr_base->clks.pwr_state = DCN_PWR_STATE_LOW_POWER;
   104	}
   105	

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

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