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Subjectdrivers/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@intel.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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