[PATCH v5] drm/sun4i: hdmi: Implement I2C adapter for A10s DDC bus
kbuild test robot
lkp at intel.com
Wed Jun 28 22:06:47 UTC 2017
Hi Jonathan,
[auto build test WARNING on next-20170627]
[cannot apply to v4.12-rc7 v4.12-rc6 v4.12-rc5 v4.12-rc7]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Jonathan-Liu/drm-sun4i-hdmi-Implement-I2C-adapter-for-A10s-DDC-bus/20170629-001335
config: arm-sunxi_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm
All warnings (new ones prefixed by >>):
drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c: In function 'fifo_transfer':
>> drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c:65:2: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
int level = (int)(fifo_status & SUN4I_HDMI_DDC_FIFO_STATUS_LEVEL_MASK);
^~~
vim +65 drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
49 int ret;
50
51 /* Wait until error or FIFO ready */
52 ret = readl_poll_timeout(hdmi->base + SUN4I_HDMI_DDC_INT_STATUS_REG,
53 int_status,
54 is_err_status(int_status) ||
55 is_fifo_flag_unset(hdmi, &fifo_status, flag),
56 min(len, SUN4I_HDMI_DDC_FIFO_SIZE) * byte_time,
57 100000);
58
59 if (is_err_status(int_status))
60 return -EIO;
61 if (ret)
62 return -ETIMEDOUT;
63
64 /* Read FIFO level */
> 65 int level = (int)(fifo_status & SUN4I_HDMI_DDC_FIFO_STATUS_LEVEL_MASK);
66
67 /* Limit transfer length using FIFO level to avoid underflow/overflow */
68 len = min(len, read ? level : (SUN4I_HDMI_DDC_FIFO_SIZE - level));
69
70 if (read)
71 readsb(hdmi->base + SUN4I_HDMI_DDC_FIFO_DATA_REG, buf, len);
72 else
73 writesb(hdmi->base + SUN4I_HDMI_DDC_FIFO_DATA_REG, buf, len);
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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