Re: [PATCH] drm/amd/display: Deduplicate DCN DDC register assignment
From: kernel test robot
Date: Sun Mar 22 2026 - 04:23:53 EST
Hi guilhermeivo,
kernel test robot noticed the following build errors:
[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on linus/master v7.0-rc4 next-20260320]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/guilhermeivo/drm-amd-display-Deduplicate-DCN-DDC-register-assignment/20260322-024236
base: https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link: https://lore.kernel.org/r/20260321015654.105059-1-guilhermeivob%40gmail.com
patch subject: [PATCH] drm/amd/display: Deduplicate DCN DDC register assignment
config: arc-randconfig-001-20260322 (https://download.01.org/0day-ci/archive/20260322/202603221654.UL8er52L-lkp@xxxxxxxxx/config)
compiler: arc-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260322/202603221654.UL8er52L-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603221654.UL8er52L-lkp@xxxxxxxxx/
All errors (new ones prefixed by >>):
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/hw_factory_dcn32.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:15:16: warning: 'struct ddc_mask' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_mask *mask)
^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:14:16: warning: 'struct ddc_shift' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_shift *shift,
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h: In function 'dcn_define_ddc_registers_common':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:35:22: error: invalid use of undefined type 'struct ddc_shift'
ddc->shifts = &shift[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:35:22: error: dereferencing pointer to incomplete type 'const struct ddc_shift'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:36:20: error: invalid use of undefined type 'struct ddc_mask'
ddc->masks = &mask[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:36:20: error: dereferencing pointer to incomplete type 'const struct ddc_mask'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/hw_factory_dcn32.c: In function 'define_ddc_registers':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/hw_factory_dcn32.c:212:3: error: passing argument 5 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_shift,
^~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/hw_factory_dcn32.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:14:27: note: expected 'const struct ddc_shift *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_shift *shift,
~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/hw_factory_dcn32.c:213:3: error: passing argument 6 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_mask);
^~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/hw_factory_dcn32.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h:15:26: note: expected 'const struct ddc_mask *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_mask *mask)
~~~~~~~~~~~~~~~~~~~~~~~^~~~
cc1: some warnings being treated as errors
--
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/hw_factory_dcn30.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:15:16: warning: 'struct ddc_mask' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_mask *mask)
^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:14:16: warning: 'struct ddc_shift' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_shift *shift,
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h: In function 'dcn_define_ddc_registers_common':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:35:22: error: invalid use of undefined type 'struct ddc_shift'
ddc->shifts = &shift[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:35:22: error: dereferencing pointer to incomplete type 'const struct ddc_shift'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:36:20: error: invalid use of undefined type 'struct ddc_mask'
ddc->masks = &mask[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:36:20: error: dereferencing pointer to incomplete type 'const struct ddc_mask'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/hw_factory_dcn30.c: In function 'define_ddc_registers':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/hw_factory_dcn30.c:208:3: error: passing argument 5 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_shift,
^~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/hw_factory_dcn30.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:14:27: note: expected 'const struct ddc_shift *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_shift *shift,
~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/hw_factory_dcn30.c:209:3: error: passing argument 6 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_mask);
^~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/hw_factory_dcn30.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn30/../hw_factory_dcn_ddc.h:15:26: note: expected 'const struct ddc_mask *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_mask *mask)
~~~~~~~~~~~~~~~~~~~~~~~^~~~
cc1: some warnings being treated as errors
--
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/hw_factory_dcn401.c:15:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:15:16: warning: 'struct ddc_mask' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_mask *mask)
^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:14:16: warning: 'struct ddc_shift' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_shift *shift,
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h: In function 'dcn_define_ddc_registers_common':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:35:22: error: invalid use of undefined type 'struct ddc_shift'
ddc->shifts = &shift[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:35:22: error: dereferencing pointer to incomplete type 'const struct ddc_shift'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:36:20: error: invalid use of undefined type 'struct ddc_mask'
ddc->masks = &mask[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:36:20: error: dereferencing pointer to incomplete type 'const struct ddc_mask'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/hw_factory_dcn401.c: In function 'define_ddc_registers':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/hw_factory_dcn401.c:203:3: error: passing argument 5 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_shift,
^~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/hw_factory_dcn401.c:15:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:14:27: note: expected 'const struct ddc_shift *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_shift *shift,
~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/hw_factory_dcn401.c:204:3: error: passing argument 6 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_mask);
^~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/hw_factory_dcn401.c:15:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn401/../hw_factory_dcn_ddc.h:15:26: note: expected 'const struct ddc_mask *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_mask *mask)
~~~~~~~~~~~~~~~~~~~~~~~^~~~
cc1: some warnings being treated as errors
--
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/hw_factory_dcn21.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:15:16: warning: 'struct ddc_mask' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_mask *mask)
^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:14:16: warning: 'struct ddc_shift' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_shift *shift,
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h: In function 'dcn_define_ddc_registers_common':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:35:22: error: invalid use of undefined type 'struct ddc_shift'
ddc->shifts = &shift[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:35:22: error: dereferencing pointer to incomplete type 'const struct ddc_shift'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:36:20: error: invalid use of undefined type 'struct ddc_mask'
ddc->masks = &mask[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:36:20: error: dereferencing pointer to incomplete type 'const struct ddc_mask'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/hw_factory_dcn21.c: In function 'define_ddc_registers':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/hw_factory_dcn21.c:179:3: error: passing argument 5 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_shift,
^~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/hw_factory_dcn21.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:14:27: note: expected 'const struct ddc_shift *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_shift *shift,
~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/hw_factory_dcn21.c:180:3: error: passing argument 6 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_mask);
^~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/hw_factory_dcn21.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn21/../hw_factory_dcn_ddc.h:15:26: note: expected 'const struct ddc_mask *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_mask *mask)
~~~~~~~~~~~~~~~~~~~~~~~^~~~
cc1: some warnings being treated as errors
--
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/hw_factory_dcn315.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:15:16: warning: 'struct ddc_mask' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_mask *mask)
^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:14:16: warning: 'struct ddc_shift' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_shift *shift,
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h: In function 'dcn_define_ddc_registers_common':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:35:22: error: invalid use of undefined type 'struct ddc_shift'
ddc->shifts = &shift[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:35:22: error: dereferencing pointer to incomplete type 'const struct ddc_shift'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:36:20: error: invalid use of undefined type 'struct ddc_mask'
ddc->masks = &mask[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:36:20: error: dereferencing pointer to incomplete type 'const struct ddc_mask'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/hw_factory_dcn315.c: In function 'define_ddc_registers':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/hw_factory_dcn315.c:200:3: error: passing argument 5 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_shift,
^~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/hw_factory_dcn315.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:14:27: note: expected 'const struct ddc_shift *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_shift *shift,
~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/hw_factory_dcn315.c:201:3: error: passing argument 6 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_mask);
^~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/hw_factory_dcn315.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn315/../hw_factory_dcn_ddc.h:15:26: note: expected 'const struct ddc_mask *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_mask *mask)
~~~~~~~~~~~~~~~~~~~~~~~^~~~
cc1: some warnings being treated as errors
--
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/hw_factory_dcn20.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:15:16: warning: 'struct ddc_mask' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_mask *mask)
^~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:14:16: warning: 'struct ddc_shift' declared inside parameter list will not be visible outside of this definition or declaration
const struct ddc_shift *shift,
^~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h: In function 'dcn_define_ddc_registers_common':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:35:22: error: invalid use of undefined type 'struct ddc_shift'
ddc->shifts = &shift[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:35:22: error: dereferencing pointer to incomplete type 'const struct ddc_shift'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:36:20: error: invalid use of undefined type 'struct ddc_mask'
ddc->masks = &mask[en];
^
>> drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:36:20: error: dereferencing pointer to incomplete type 'const struct ddc_mask'
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/hw_factory_dcn20.c: In function 'define_ddc_registers':
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/hw_factory_dcn20.c:191:3: error: passing argument 5 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_shift,
^~~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/hw_factory_dcn20.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:14:27: note: expected 'const struct ddc_shift *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_shift *shift,
~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/hw_factory_dcn20.c:192:3: error: passing argument 6 of 'dcn_define_ddc_registers_common' from incompatible pointer type [-Werror=incompatible-pointer-types]
ddc_mask);
^~~~~~~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/hw_factory_dcn20.c:35:
drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn20/../hw_factory_dcn_ddc.h:15:26: note: expected 'const struct ddc_mask *' but argument is of type 'const struct ddc_sh_mask *'
const struct ddc_mask *mask)
~~~~~~~~~~~~~~~~~~~~~~~^~~~
cc1: some warnings being treated as errors
vim +35 drivers/gpu/drm/amd/amdgpu/../display/dc/gpio/dcn32/../hw_factory_dcn_ddc.h
8
9 static inline void dcn_define_ddc_registers_common(
10 struct hw_gpio_pin *pin,
11 uint32_t en,
12 const struct ddc_registers *data_regs,
13 const struct ddc_registers *clk_regs,
14 const struct ddc_shift *shift,
15 const struct ddc_mask *mask)
16 {
17 struct hw_ddc *ddc = HW_DDC_FROM_BASE(pin);
18
19 switch (pin->id) {
20 case GPIO_ID_DDC_DATA:
21 ddc->regs = &data_regs[en];
22 ddc->base.regs = &data_regs[en].gpio;
23 break;
24
25 case GPIO_ID_DDC_CLOCK:
26 ddc->regs = &clk_regs[en];
27 ddc->base.regs = &clk_regs[en].gpio;
28 break;
29
30 default:
31 ASSERT_CRITICAL(false);
32 return;
33 }
34
> 35 ddc->shifts = &shift[en];
> 36 ddc->masks = &mask[en];
37 }
38
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