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Message-ID: <202501180524.qKnNpITh-lkp@intel.com>
Date: Sat, 18 Jan 2025 06:04:18 +0800
From: kernel test robot <lkp@...el.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
chunkuang.hu@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, p.zabel@...gutronix.de,
airlied@...il.com, simona@...ll.ch,
maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
tzimmermann@...e.de, robh@...nel.org, krzk+dt@...nel.org,
conor+dt@...nel.org, matthias.bgg@...il.com,
angelogioacchino.delregno@...labora.com, ck.hu@...iatek.com,
jitao.shi@...iatek.com, jie.qiu@...iatek.com,
junzhi.zhao@...iatek.com, dri-devel@...ts.freedesktop.org,
linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
kernel@...labora.com, dmitry.baryshkov@...aro.org,
lewis.liao@...iatek.com, ives.chenjh@...iatek.com,
tommyyl.chen@...iatek.com, jason-jh.lin@...iatek.com
Subject: Re: [PATCH v5 32/34] drm/mediatek: Introduce HDMI/DDC v2 for
MT8195/MT8188
Hi AngeloGioacchino,
kernel test robot noticed the following build warnings:
[auto build test WARNING on next-20250113]
[cannot apply to robh/for-next pza/reset/next linus/master pza/imx-drm/next drm-misc/drm-misc-next v6.13-rc7 v6.13-rc6 v6.13-rc5 v6.13-rc7]
[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/AngeloGioacchino-Del-Regno/dt-bindings-display-mediatek-dpi-Add-MT8195-and-MT8188-compat/20250113-225554
base: next-20250113
patch link: https://lore.kernel.org/r/20250113145232.227674-33-angelogioacchino.delregno%40collabora.com
patch subject: [PATCH v5 32/34] drm/mediatek: Introduce HDMI/DDC v2 for MT8195/MT8188
config: openrisc-allyesconfig (https://download.01.org/0day-ci/archive/20250118/202501180524.qKnNpITh-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250118/202501180524.qKnNpITh-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202501180524.qKnNpITh-lkp@intel.com/
All warnings (new ones prefixed by >>):
drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c: In function 'mtk_ddc_check_and_rise_low_bus':
drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c:59:36: error: implicit declaration of function 'FIELD_PREP' [-Wimplicit-function-declaration]
59 | FIELD_PREP(DDC_CTRL_CMD, DDC_CMD_CLOCK_SCL));
| ^~~~~~~~~~
In file included from ./arch/openrisc/include/generated/asm/div64.h:1,
from include/linux/math.h:6,
from include/linux/kernel.h:27,
from include/linux/clk.h:13,
from drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c:11:
drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c: In function 'mtk_ddcm_read_hdmi':
>> include/asm-generic/div64.h:183:35: warning: comparison of distinct pointer types lacks a cast [-Wcompare-distinct-pointer-types]
183 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c:139:23: note: in expansion of macro 'do_div'
139 | rem = do_div(loop_counter, temp_length);
| ^~~~~~
In file included from include/linux/err.h:5,
from include/linux/clk.h:12:
>> include/asm-generic/div64.h:195:32: warning: right shift count >= width of type [-Wshift-count-overflow]
195 | } else if (likely(((n) >> 32) == 0)) { \
| ^~
include/linux/compiler.h:76:45: note: in definition of macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c:139:23: note: in expansion of macro 'do_div'
139 | rem = do_div(loop_counter, temp_length);
| ^~~~~~
include/asm-generic/div64.h:199:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Wincompatible-pointer-types]
199 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| u16 * {aka short unsigned int *}
drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c:139:23: note: in expansion of macro 'do_div'
139 | rem = do_div(loop_counter, temp_length);
| ^~~~~~
include/asm-generic/div64.h:174:38: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'u16 *' {aka 'short unsigned int *'}
174 | extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor);
| ~~~~~~~~~~^~~~~~~~
drivers/gpu/drm/mediatek/mtk_hdmi_ddc_v2.c:207:47: error: implicit declaration of function 'FIELD_GET' [-Wimplicit-function-declaration]
207 | puc_value[read_idx] = FIELD_GET(DDC_DATA_OUT, val);
| ^~~~~~~~~
vim +183 include/asm-generic/div64.h
^1da177e4c3f41 Linus Torvalds 2005-04-16 176
^1da177e4c3f41 Linus Torvalds 2005-04-16 177 /* The unnecessary pointer compare is there
^1da177e4c3f41 Linus Torvalds 2005-04-16 178 * to check for type safety (n must be 64bit)
^1da177e4c3f41 Linus Torvalds 2005-04-16 179 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 180 # define do_div(n,base) ({ \
^1da177e4c3f41 Linus Torvalds 2005-04-16 181 uint32_t __base = (base); \
^1da177e4c3f41 Linus Torvalds 2005-04-16 182 uint32_t __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 @183 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 184 if (__builtin_constant_p(__base) && \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 185 is_power_of_2(__base)) { \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 186 __rem = (n) & (__base - 1); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 187 (n) >>= ilog2(__base); \
c747ce4706190e Geert Uytterhoeven 2021-08-11 188 } else if (__builtin_constant_p(__base) && \
461a5e51060c93 Nicolas Pitre 2015-10-30 189 __base != 0) { \
461a5e51060c93 Nicolas Pitre 2015-10-30 190 uint32_t __res_lo, __n_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 191 (n) = __div64_const32(n, __base); \
461a5e51060c93 Nicolas Pitre 2015-10-30 192 /* the remainder can be computed with 32-bit regs */ \
461a5e51060c93 Nicolas Pitre 2015-10-30 193 __res_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 194 __rem = __n_lo - __res_lo * __base; \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 @195 } else if (likely(((n) >> 32) == 0)) { \
^1da177e4c3f41 Linus Torvalds 2005-04-16 196 __rem = (uint32_t)(n) % __base; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 197 (n) = (uint32_t)(n) / __base; \
c747ce4706190e Geert Uytterhoeven 2021-08-11 198 } else { \
^1da177e4c3f41 Linus Torvalds 2005-04-16 199 __rem = __div64_32(&(n), __base); \
c747ce4706190e Geert Uytterhoeven 2021-08-11 200 } \
^1da177e4c3f41 Linus Torvalds 2005-04-16 201 __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 202 })
^1da177e4c3f41 Linus Torvalds 2005-04-16 203
--
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https://github.com/intel/lkp-tests/wiki
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