Re: [PATCH v13 5/6] drm/loongson: add drm driver for loongson display controller

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On 2022/3/28 16:51, kernel test robot wrote:
Hi Sui,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm/drm-next]
[also build test WARNING on robh/for-next linus/master v5.17 next-20220328]
[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]

url:    https://github.com/intel-lab-lkp/linux/commits/Sui-Jingfeng/MIPS-Loongson64-dts-update-the-display-controller-device-node/20220328-103101
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: microblaze-randconfig-s032-20220328 (https://download.01.org/0day-ci/archive/20220328/202203281653.wiRaycuD-lkp@xxxxxxxxx/config)
compiler: microblaze-linux-gcc (GCC) 11.2.0
reproduce:
         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
         chmod +x ~/bin/make.cross
         # apt-get install sparse
         # sparse version: v0.6.4-dirty
         # https://github.com/intel-lab-lkp/linux/commit/836c0ab646f65b0a8c6574b5d2495c8617e96545
         git remote add linux-review https://github.com/intel-lab-lkp/linux
         git fetch --no-tags linux-review Sui-Jingfeng/MIPS-Loongson64-dts-update-the-display-controller-device-node/20220328-103101
         git checkout 836c0ab646f65b0a8c6574b5d2495c8617e96545
         # save the config file to linux build tree
         mkdir build_dir
         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=microblaze SHELL=/bin/bash drivers/gpu/drm/loongson/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)
drivers/gpu/drm/loongson/lsdc_i2c.c:179:23: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *dir_reg @@     got void * @@
    drivers/gpu/drm/loongson/lsdc_i2c.c:179:23: sparse:     expected void [noderef] __iomem *dir_reg
    drivers/gpu/drm/loongson/lsdc_i2c.c:179:23: sparse:     got void *
drivers/gpu/drm/loongson/lsdc_i2c.c:180:23: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *dat_reg @@     got void * @@
    drivers/gpu/drm/loongson/lsdc_i2c.c:180:23: sparse:     expected void [noderef] __iomem *dat_reg
    drivers/gpu/drm/loongson/lsdc_i2c.c:180:23: sparse:     got void *
    drivers/gpu/drm/loongson/lsdc_i2c.c:252:23: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *dir_reg @@     got void * @@
    drivers/gpu/drm/loongson/lsdc_i2c.c:252:23: sparse:     expected void [noderef] __iomem *dir_reg
    drivers/gpu/drm/loongson/lsdc_i2c.c:252:23: sparse:     got void *
    drivers/gpu/drm/loongson/lsdc_i2c.c:253:23: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *dat_reg @@     got void * @@
    drivers/gpu/drm/loongson/lsdc_i2c.c:253:23: sparse:     expected void [noderef] __iomem *dat_reg
    drivers/gpu/drm/loongson/lsdc_i2c.c:253:23: sparse:     got void *
--
drivers/gpu/drm/loongson/lsdc_pci_drv.c:185:61: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void *reg_base @@     got void [noderef] __iomem *reg_base @@
    drivers/gpu/drm/loongson/lsdc_pci_drv.c:185:61: sparse:     expected void *reg_base
    drivers/gpu/drm/loongson/lsdc_pci_drv.c:185:61: sparse:     got void [noderef] __iomem *reg_base
--
drivers/gpu/drm/loongson/lsdc_output.c:232:63: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void *reg_base @@     got void [noderef] __iomem *reg_base @@
    drivers/gpu/drm/loongson/lsdc_output.c:232:63: sparse:     expected void *reg_base
    drivers/gpu/drm/loongson/lsdc_output.c:232:63: sparse:     got void [noderef] __iomem *reg_base

vim +179 drivers/gpu/drm/loongson/lsdc_i2c.c

    129	
    130	struct lsdc_i2c *lsdc_of_create_i2c_adapter(struct device *parent,
    131						    void *reg_base,
    132						    struct device_node *i2c_np)
    133	{
    134		unsigned int udelay = 5;
    135		unsigned int timeout = 2200;
    136		int nr = -1;
    137		struct i2c_adapter *adapter;
    138		struct lsdc_i2c *li2c;
    139		u32 sda, scl;
    140		int ret;
    141	
    142		li2c = kzalloc(sizeof(*li2c), GFP_KERNEL);
    143		if (!li2c)
    144			return ERR_PTR(-ENOMEM);
    145	
    146		spin_lock_init(&li2c->reglock);
    147	
    148		ret = of_property_read_u32(i2c_np, "loongson,sda", &sda);
    149		if (ret) {
    150			dev_err(parent, "No sda pin number provided\n");
    151			return ERR_PTR(ret);
    152		}
    153	
    154		ret = of_property_read_u32(i2c_np, "loongson,scl", &scl);
    155		if (ret) {
    156			dev_err(parent, "No scl pin number provided\n");
    157			return ERR_PTR(ret);
    158		}
    159	
    160		ret = of_property_read_u32(i2c_np, "loongson,nr", &nr);
    161		if (ret) {
    162			int id;
    163	
    164			if (ret == -EINVAL)
    165				dev_dbg(parent, "no nr provided\n");
    166	
    167			id = of_alias_get_id(i2c_np, "i2c");
    168			if (id >= 0)
    169				nr = id;
    170		}
    171	
    172		li2c->sda = 1 << sda;
    173		li2c->scl = 1 << scl;
    174	
    175		/* Optional properties which made the driver more flexible */
    176		of_property_read_u32(i2c_np, "loongson,udelay", &udelay);
    177		of_property_read_u32(i2c_np, "loongson,timeout", &timeout);
    178	
  > 179		li2c->dir_reg = reg_base + LS7A_DC_GPIO_DIR_REG;
  > 180		li2c->dat_reg = reg_base + LS7A_DC_GPIO_DAT_REG;
    181	
    182		li2c->bit.setsda = ls7a_i2c_set_sda;
    183		li2c->bit.setscl = ls7a_i2c_set_scl;
    184		li2c->bit.getsda = ls7a_i2c_get_sda;
    185		li2c->bit.getscl = ls7a_i2c_get_scl;
    186		li2c->bit.udelay = udelay;
    187		li2c->bit.timeout = usecs_to_jiffies(timeout);
    188		li2c->bit.data = li2c;
    189	
    190		adapter = &li2c->adapter;
    191		adapter->algo_data = &li2c->bit;
    192		adapter->owner = THIS_MODULE;
    193		adapter->class = I2C_CLASS_DDC;
    194		adapter->dev.parent = parent;
    195		adapter->nr = nr;
    196		adapter->dev.of_node = i2c_np;
    197	
    198		snprintf(adapter->name, sizeof(adapter->name), "gpio-i2c-%d", nr);
    199	
    200		i2c_set_adapdata(adapter, li2c);
    201	
    202		ret = i2c_bit_add_numbered_bus(adapter);
    203		if (ret) {
    204			if (i2c_np)
    205				of_node_put(i2c_np);
    206	
    207			kfree(li2c);
    208			return ERR_PTR(ret);
    209		}
    210	
    211		dev_info(parent, "sda=%u, scl=%u, nr=%d, udelay=%u, timeout=%u\n",
    212			 li2c->sda, li2c->scl, nr, udelay, timeout);
    213	
    214		ret = devm_add_action_or_reset(parent, lsdc_of_release_i2c_adapter, li2c);
    215		if (ret)
    216			return NULL;
    217	
    218		return li2c;
    219	}
    220	

Hi,  my driver will not used on microblaze arch,

what does this warnings means, do i need to fix this?




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