Hi Chris,

[auto build test WARNING on drm/drm-next]
[also build test WARNING on v4.4-rc1 next-20151118]
[cannot apply to rockchip/for-next]

url:    
https://github.com/0day-ci/linux/commits/Chris-Zhong/Add-mipi-dsi-support-for-rk3288/20151119-114228
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: openrisc-allmodconfig (attached as .config)
reproduce:
        wget 
https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
 -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=openrisc 

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/bridge/dw_mipi_dsi.c: In function 
'dw_mipi_dsi_get_hcomponent_lbcc':
>> drivers/gpu/drm/bridge/dw_mipi_dsi.c:819:9: warning: comparison of distinct 
>> pointer types lacks a cast
>> drivers/gpu/drm/bridge/dw_mipi_dsi.c:819:2: warning: right shift count >= 
>> width of type
>> drivers/gpu/drm/bridge/dw_mipi_dsi.c:819:2: warning: passing argument 1 of 
>> '__div64_32' from incompatible pointer type
   include/asm-generic/div64.h:35:17: note: expected 'uint64_t *' but argument 
is of type 'u32 *'

vim +819 drivers/gpu/drm/bridge/dw_mipi_dsi.c

   803  static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
   804  {
   805          dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | 
LPRX_TO_CNT(1000));
   806          dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
   807          dsi_write(dsi, DSI_CMD_MODE_CFG, CMD_MODE_ALL_LP);
   808          dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
   809  }
   810  
   811  /* Get lane byte clock cycles. */
   812  static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
   813                                             u32 hcomponent)
   814  {
   815          u32 frac, lbcc;
   816  
   817          lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
   818  
 > 819          frac = do_div(lbcc, dsi->mode->clock);
   820          if (frac)
   821                  lbcc++;
   822  
   823          return lbcc;
   824  }
   825  
   826  static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi)
   827  {

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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