Re: [PATCH v12 2/2] drm/bridge: Add I2C based driver for ps8640 bridge
From: kbuild test robot
Date: Wed Mar 16 2016 - 10:41:21 EST
Hi Jitao,
[auto build test WARNING on drm/drm-next]
[also build test WARNING on v4.5 next-20160316]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]
url: https://github.com/0day-ci/linux/commits/Jitao-Shi/Documentation-bridge-Add-documentation-for-ps8640-DT-properties/20160316-213031
base: git://people.freedesktop.org/~airlied/linux.git drm-next
config: i386-allmodconfig (attached as .config)
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/bridge/parade-ps8640.c:114:37: warning: excess elements in scalar initializer
static const u8 hw_chip_id = {0x00, 0x0a, 0x00, 0x30};
^
drivers/gpu/drm/bridge/parade-ps8640.c:114:37: note: (near initialization for 'hw_chip_id')
drivers/gpu/drm/bridge/parade-ps8640.c:114:43: warning: excess elements in scalar initializer
static const u8 hw_chip_id = {0x00, 0x0a, 0x00, 0x30};
^
drivers/gpu/drm/bridge/parade-ps8640.c:114:43: note: (near initialization for 'hw_chip_id')
drivers/gpu/drm/bridge/parade-ps8640.c:114:49: warning: excess elements in scalar initializer
static const u8 hw_chip_id = {0x00, 0x0a, 0x00, 0x30};
^
drivers/gpu/drm/bridge/parade-ps8640.c:114:49: note: (near initialization for 'hw_chip_id')
drivers/gpu/drm/bridge/parade-ps8640.c: In function 'ps8640_bridge_attach':
drivers/gpu/drm/bridge/parade-ps8640.c:430:10: error: implicit declaration of function 'of_find_mipi_dsi_host_by_node' [-Werror=implicit-function-declaration]
host = of_find_mipi_dsi_host_by_node(dsi_node);
^
drivers/gpu/drm/bridge/parade-ps8640.c:430:8: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
host = of_find_mipi_dsi_host_by_node(dsi_node);
^
drivers/gpu/drm/bridge/parade-ps8640.c: In function 'ps8640_check_chip_id':
>> drivers/gpu/drm/bridge/parade-ps8640.c:717:21: warning: passing argument 2 of '__builtin_memcmp' makes pointer from integer without a cast [-Wint-conversion]
return memcmp(buf, hw_chip_id, sizeof(buf));
^
In file included from arch/x86/include/asm/string.h:2:0,
from include/linux/string.h:18,
from arch/x86/include/asm/page_32.h:34,
from arch/x86/include/asm/page.h:13,
from arch/x86/include/asm/thread_info.h:11,
from include/linux/thread_info.h:54,
from arch/x86/include/asm/preempt.h:6,
from include/linux/preempt.h:59,
from include/linux/spinlock.h:50,
from include/linux/mmzone.h:7,
from include/linux/gfp.h:5,
from include/linux/firmware.h:6,
from drivers/gpu/drm/bridge/parade-ps8640.c:16:
arch/x86/include/asm/string_32.h:202:16: note: expected 'const void *' but argument is of type 'u8 {aka const unsigned char}'
#define memcmp __builtin_memcmp
^
>> include/linux/string.h:112:12: note: in expansion of macro 'memcmp'
extern int memcmp(const void *,const void *,__kernel_size_t);
^
cc1: some warnings being treated as errors
vim +114 drivers/gpu/drm/bridge/parade-ps8640.c
98 struct mipi_dsi_device dsi;
99 struct i2c_client *page[8];
100 struct i2c_client *ddc_i2c;
101 struct regulator_bulk_data supplies[2];
102 struct drm_panel *panel;
103 struct gpio_desc *gpio_rst_n;
104 struct gpio_desc *gpio_slp_n;
105 struct gpio_desc *gpio_mode_sel_n;
106 bool enabled;
107
108 /* firmware file info */
109 bool in_fw_update;
110 struct ps8640_info info;
111 };
112
113 static const u8 enc_ctrl_code[6] = {0xaa, 0x55, 0x50, 0x41, 0x52, 0x44};
> 114 static const u8 hw_chip_id = {0x00, 0x0a, 0x00, 0x30};
115
116 static int ps8640_read(struct i2c_client *client, u8 reg, u8 *data,
117 u16 data_len)
118 {
119 int ret;
120 struct i2c_msg msgs[] = {
121 {
122 .addr = client->addr,
---
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