Re: [PATCH v3 06/12] drm/bridge: Add Synopsys DesignWare MIPI DSI host controller driver

kbuild test robot
2015-11-19T04:26:19Z

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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 {

---
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