[linux-next:master 10241/12559] drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c:336:9: warning: assignment to 'struct drm_bridge *' from 'int' makes pointer from integer without a cast

[kernel test robot <lkp@intel.com>]

Hi Luca,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   6c2cb8b8b843d216ab549b678a0d8831c43153e0
commit: aa8a8c7e4641ebcef02dd6fa387ca334857367f4 [10241/12559] drm/bridge: panel: move all code to drm_panel.c
config: parisc-randconfig-r2200-20260930 (https://download.01.org/0day-ci/archive/20260930/202609302014.WoEXKnE8-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 10.5.0
smatch: v0.5.0-9187-g5189e3fb
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260930/202609302014.WoEXKnE8-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609302014.WoEXKnE8-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c: In function 'dw_mipi_dsi_host_attach':
   drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c:336:11: error: implicit declaration of function 'devm_drm_of_get_bridge'; did you mean 'devm_drm_put_bridge'? [-Werror=implicit-function-declaration]
     336 |  bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, 1, 0);
         |           ^~~~~~~~~~~~~~~~~~~~~~
         |           devm_drm_put_bridge
>> drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c:336:9: warning: assignment to 'struct drm_bridge *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     336 |  bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, 1, 0);
         |         ^
   cc1: some warnings being treated as errors


vim +336 drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c

46fc51546d4406 Philippe CORNU   2017-07-17  316  
46fc51546d4406 Philippe CORNU   2017-07-17  317  static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
46fc51546d4406 Philippe CORNU   2017-07-17  318  				   struct mipi_dsi_device *device)
46fc51546d4406 Philippe CORNU   2017-07-17  319  {
46fc51546d4406 Philippe CORNU   2017-07-17  320  	struct dw_mipi_dsi *dsi = host_to_dsi(host);
90910a6511238d Heiko Stuebner   2018-10-01  321  	const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;
65af9070cd09a9 Jagan Teki       2022-03-31  322  	struct drm_bridge *bridge;
46fc51546d4406 Philippe CORNU   2017-07-17  323  	int ret;
46fc51546d4406 Philippe CORNU   2017-07-17  324  
46fc51546d4406 Philippe CORNU   2017-07-17  325  	if (device->lanes > dsi->plat_data->max_data_lanes) {
46fc51546d4406 Philippe CORNU   2017-07-17  326  		dev_err(dsi->dev, "the number of data lanes(%u) is too many\n",
46fc51546d4406 Philippe CORNU   2017-07-17  327  			device->lanes);
46fc51546d4406 Philippe CORNU   2017-07-17  328  		return -EINVAL;
46fc51546d4406 Philippe CORNU   2017-07-17  329  	}
46fc51546d4406 Philippe CORNU   2017-07-17  330  
46fc51546d4406 Philippe CORNU   2017-07-17  331  	dsi->lanes = device->lanes;
46fc51546d4406 Philippe CORNU   2017-07-17  332  	dsi->channel = device->channel;
46fc51546d4406 Philippe CORNU   2017-07-17  333  	dsi->format = device->format;
46fc51546d4406 Philippe CORNU   2017-07-17  334  	dsi->mode_flags = device->mode_flags;
46fc51546d4406 Philippe CORNU   2017-07-17  335  
1c74c1fb83ebb4 Jagan Teki       2022-03-31 @336  	bridge = devm_drm_of_get_bridge(dsi->dev, dsi->dev->of_node, 1, 0);
65af9070cd09a9 Jagan Teki       2022-03-31  337  	if (IS_ERR(bridge))
65af9070cd09a9 Jagan Teki       2022-03-31  338  		return PTR_ERR(bridge);
46fc51546d4406 Philippe CORNU   2017-07-17  339  
05aa61334592ad Ondrej Jirman    2023-06-18  340  	bridge->pre_enable_prev_first = true;
65af9070cd09a9 Jagan Teki       2022-03-31  341  	dsi->panel_bridge = bridge;
65af9070cd09a9 Jagan Teki       2022-03-31  342  
65af9070cd09a9 Jagan Teki       2022-03-31  343  	drm_bridge_add(&dsi->bridge);
65af9070cd09a9 Jagan Teki       2022-03-31  344  
90910a6511238d Heiko Stuebner   2018-10-01  345  	if (pdata->host_ops && pdata->host_ops->attach) {
90910a6511238d Heiko Stuebner   2018-10-01  346  		ret = pdata->host_ops->attach(pdata->priv_data, device);
90910a6511238d Heiko Stuebner   2018-10-01  347  		if (ret < 0)
be19b43f92fae4 Osama Abdelkader 2026-04-03  348  			goto err_remove_bridge;
90910a6511238d Heiko Stuebner   2018-10-01  349  	}
90910a6511238d Heiko Stuebner   2018-10-01  350  
46fc51546d4406 Philippe CORNU   2017-07-17  351  	return 0;
be19b43f92fae4 Osama Abdelkader 2026-04-03  352  
be19b43f92fae4 Osama Abdelkader 2026-04-03  353  err_remove_bridge:
be19b43f92fae4 Osama Abdelkader 2026-04-03  354  	drm_bridge_remove(&dsi->bridge);
be19b43f92fae4 Osama Abdelkader 2026-04-03  355  	return ret;
46fc51546d4406 Philippe CORNU   2017-07-17  356  }
46fc51546d4406 Philippe CORNU   2017-07-17  357  

:::::: The code at line 336 was first introduced by commit
:::::: 1c74c1fb83ebb414c017d459e7875abe777654d7 drm: bridge: dw-mipi-dsi: Switch to devm_drm_of_get_bridge

:::::: TO: Jagan Teki <jagan@amarulasolutions.com>
:::::: CC: Robert Foss <robert.foss@linaro.org>

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