Re: [PATCH 9/9] drm/bridge: imx: Add i.MX93 MIPI DSI support

kernel test robot
2023-07-19T05:42:09Z

Hi Liu,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-exynos/exynos-drm-next]
[also build test ERROR on drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm-tip/drm-tip linus/master v6.5-rc2 next-20230718]
[cannot apply to drm-misc/drm-misc-next drm/drm-next]
[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/Liu-Ying/drm-bridge-synopsys-dw-mipi-dsi-Add-dw_mipi_dsi_get_bridge-helper/20230718-172247
base: https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next
patch link: https://lore.kernel.org/r/20230717061831.1826878-10-victor.liu%40nxp.com
patch subject: [PATCH 9/9] drm/bridge: imx: Add i.MX93 MIPI DSI support
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20230719/202307190811.jOcroxF5-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230719/202307190811.jOcroxF5-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202307190811.jOcroxF5-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

In file included from arch/arm/include/asm/div64.h:107,
from include/linux/math.h:6,
from include/linux/kernel.h:26,
from include/linux/clk.h:13,
from drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c:9:
drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c: In function 'dphy_pll_get_configure_from_opts':
include/asm-generic/div64.h:222:35: warning: comparison of distinct pointer types lacks a cast
222 | (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
| ^~
drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c:272:17: note: in expansion of macro 'do_div'
272 | do_div(tmp, n * fvco_div);
| ^~~~~~
In file included from include/linux/build_bug.h:5,
from include/linux/bitfield.h:10,
from drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c:7:
>> include/asm-generic/div64.h:234:32: warning: right shift count >= width of type [-Wshift-count-overflow]
234 | } 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/bridge/imx/imx93-mipi-dsi.c:272:17: note: in expansion of macro 'do_div'
272 | do_div(tmp, n * fvco_div);
| ^~~~~~
>> include/asm-generic/div64.h:238:36: error: passing argument 1 of '__div64_32' from incompatible pointer type [-Werror=incompatible-pointer-types]
238 | __rem = __div64_32(&(n), __base); \
| ^~~~
| |
| long unsigned int *
drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c:272:17: note: in expansion of macro 'do_div'
272 | do_div(tmp, n * fvco_div);
| ^~~~~~
arch/arm/include/asm/div64.h:24:45: note: expected 'uint64_t *' {aka 'long long unsigned int *'} but argument is of type 'long unsigned int *'
24 | static inline uint32_t __div64_32(uint64_t *n, uint32_t base)
| ~~~~~~~~~~^
cc1: some warnings being treated as errors

vim +/__div64_32 +238 include/asm-generic/div64.h

^1da177e4c3f41 Linus Torvalds 2005-04-16 215
^1da177e4c3f41 Linus Torvalds 2005-04-16 216 /* The unnecessary pointer compare is there
^1da177e4c3f41 Linus Torvalds 2005-04-16 217 * to check for type safety (n must be 64bit)
^1da177e4c3f41 Linus Torvalds 2005-04-16 218 */
^1da177e4c3f41 Linus Torvalds 2005-04-16 219 # define do_div(n,base) ({ \
^1da177e4c3f41 Linus Torvalds 2005-04-16 220 uint32_t __base = (base); \
^1da177e4c3f41 Linus Torvalds 2005-04-16 221 uint32_t __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 222 (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 223 if (__builtin_constant_p(__base) && \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 224 is_power_of_2(__base)) { \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 225 __rem = (n) & (__base - 1); \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 226 (n) >>= ilog2(__base); \
c747ce4706190e Geert Uytterhoeven 2021-08-11 227 } else if (__builtin_constant_p(__base) && \
461a5e51060c93 Nicolas Pitre 2015-10-30 228 __base != 0) { \
461a5e51060c93 Nicolas Pitre 2015-10-30 229 uint32_t __res_lo, __n_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 230 (n) = __div64_const32(n, __base); \
461a5e51060c93 Nicolas Pitre 2015-10-30 231 /* the remainder can be computed with 32-bit regs */ \
461a5e51060c93 Nicolas Pitre 2015-10-30 232 __res_lo = (n); \
461a5e51060c93 Nicolas Pitre 2015-10-30 233 __rem = __n_lo - __res_lo * __base; \
911918aa7ef6f8 Nicolas Pitre 2015-11-02 @234 } else if (likely(((n) >> 32) == 0)) { \
^1da177e4c3f41 Linus Torvalds 2005-04-16 235 __rem = (uint32_t)(n) % __base; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 236 (n) = (uint32_t)(n) / __base; \
c747ce4706190e Geert Uytterhoeven 2021-08-11 237 } else { \
^1da177e4c3f41 Linus Torvalds 2005-04-16 @238 __rem = __div64_32(&(n), __base); \
c747ce4706190e Geert Uytterhoeven 2021-08-11 239 } \
^1da177e4c3f41 Linus Torvalds 2005-04-16 240 __rem; \
^1da177e4c3f41 Linus Torvalds 2005-04-16 241 })
^1da177e4c3f41 Linus Torvalds 2005-04-16 242

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