Re: [PATCH 8/8] drm/bridge: it66121: Allow link this driver as a lib

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Hi Sui,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on linus/master v6.7-rc2 next-20231120]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Sui-Jingfeng/drm-bridge-it66121-Use-dev-replace-ctx-dev-in-the-it66121_probe/20231114-231203
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20231114150130.497915-9-sui.jingfeng%40linux.dev
patch subject: [PATCH 8/8] drm/bridge: it66121: Allow link this driver as a lib
config: x86_64-buildonly-randconfig-004-20231120 (https://download.01.org/0day-ci/archive/20231120/202311201649.qjEbx5YL-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231120/202311201649.qjEbx5YL-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311201649.qjEbx5YL-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/bridge/ite-it66121.c:1654:5: warning: no previous prototype for function 'it66121_create_bridge' [-Wmissing-prototypes]
   int it66121_create_bridge(struct i2c_client *client, bool of_support,
       ^
   drivers/gpu/drm/bridge/ite-it66121.c:1654:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int it66121_create_bridge(struct i2c_client *client, bool of_support,
   ^
   static 
>> drivers/gpu/drm/bridge/ite-it66121.c:1752:6: warning: no previous prototype for function 'it66121_destroy_bridge' [-Wmissing-prototypes]
   void it66121_destroy_bridge(struct drm_bridge *bridge)
        ^
   drivers/gpu/drm/bridge/ite-it66121.c:1752:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void it66121_destroy_bridge(struct drm_bridge *bridge)
   ^
   static 
   2 warnings generated.


vim +/it66121_create_bridge +1654 drivers/gpu/drm/bridge/ite-it66121.c

  1653	
> 1654	int it66121_create_bridge(struct i2c_client *client, bool of_support,
  1655				  bool hpd_support, bool audio_support,
  1656				  struct drm_bridge **bridge)
  1657	{
  1658		struct device *dev = &client->dev;
  1659		int ret;
  1660		struct it66121_ctx *ctx;
  1661	
  1662		ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
  1663		if (!ctx)
  1664			return -ENOMEM;
  1665	
  1666		ctx->dev = dev;
  1667		ctx->client = client;
  1668		mutex_init(&ctx->lock);
  1669	
  1670		if (of_support) {
  1671			ret = it66121_of_read_bus_width(dev, &ctx->bus_width);
  1672			if (ret)
  1673				return ret;
  1674	
  1675			ret = it66121_of_get_next_bridge(dev, &ctx->next_bridge);
  1676			if (ret)
  1677				return ret;
  1678		} else {
  1679			ctx->bus_width = 24;
  1680			ctx->next_bridge = NULL;
  1681		}
  1682	
  1683		it66121_hw_reset(ctx);
  1684	
  1685		ctx->regmap = devm_regmap_init_i2c(client, &it66121_regmap_config);
  1686		if (IS_ERR(ctx->regmap))
  1687			return PTR_ERR(ctx->regmap);
  1688	
  1689		ret = it66121_read_chip_id(ctx, false);
  1690		if (ret)
  1691			return ret;
  1692	
  1693		ctx->info = it66121_get_match_data(ctx->vender_id, ctx->device_id);
  1694		if (!ctx->info)
  1695			return -ENODEV;
  1696	
  1697		if (hpd_support) {
  1698			ret = devm_request_threaded_irq(dev, client->irq, NULL,
  1699							it66121_irq_threaded_handler,
  1700							IRQF_ONESHOT, dev_name(dev),
  1701							ctx);
  1702			if (ret < 0) {
  1703				dev_err(dev, "Failed to request irq: %d\n", ret);
  1704				return ret;
  1705			}
  1706		}
  1707	
  1708		it66121_bridge_init_base(&ctx->bridge, dev->of_node, true);
  1709	
  1710		if (audio_support)
  1711			it66121_audio_codec_init(ctx, dev);
  1712	
  1713		*bridge = &ctx->bridge;
  1714	
  1715		dev_info(dev, "IT66121 probed, chip id: 0x%x:0x%x, revision: %u\n",
  1716			 ctx->vender_id, ctx->device_id, ctx->revision);
  1717	
  1718		return 0;
  1719	}
  1720	EXPORT_SYMBOL_GPL(it66121_create_bridge);
  1721	
  1722	static int it66121_probe(struct i2c_client *client)
  1723	{
  1724		struct device *dev = &client->dev;
  1725		struct it66121_ctx *ctx;
  1726		struct drm_bridge *bridge;
  1727		int ret;
  1728	
  1729		if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  1730			dev_err(dev, "I2C check functionality failed.\n");
  1731			return -ENXIO;
  1732		}
  1733	
  1734		ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(it66121_supplies),
  1735						     it66121_supplies);
  1736		if (ret) {
  1737			dev_err(dev, "Failed to enable power supplies\n");
  1738			return ret;
  1739		}
  1740	
  1741		ret = it66121_create_bridge(client, true, true, true, &bridge);
  1742		if (ret)
  1743			return ret;
  1744	
  1745		ctx = bridge_to_it66121(bridge);
  1746	
  1747		i2c_set_clientdata(client, ctx);
  1748	
  1749		return 0;
  1750	}
  1751	
> 1752	void it66121_destroy_bridge(struct drm_bridge *bridge)
  1753	{
  1754		struct it66121_ctx *ctx = bridge_to_it66121(bridge);
  1755	
  1756		drm_bridge_remove(bridge);
  1757	
  1758		mutex_destroy(&ctx->lock);
  1759	}
  1760	EXPORT_SYMBOL_GPL(it66121_destroy_bridge);
  1761	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki



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