Re: [PATCH 02/14] drm/msm/mdp5: Remove direct access of dev->iommu_fwspec

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Hi Joerg,

I love your patch! Yet something to improve:

[auto build test ERROR on pm/linux-next]
[also build test ERROR on tegra/for-next linux/master linus/master v5.6-rc3 next-20200228]
[cannot apply to iommu/next]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Joerg-Roedel/iommu-Move-iommu_fwspec-out-of-struct-device/20200229-075740
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
config: arm-imx_v6_v7_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

   drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c: In function 'mdp5_kms_init':
>> drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c:728:8: error: implicit declaration of function 'dev_iommu_fwspec_get'; did you mean 'iommu_fwspec_free'? [-Werror=implicit-function-declaration]
      if (!dev_iommu_fwspec_get(iommu_dev))
           ^~~~~~~~~~~~~~~~~~~~
           iommu_fwspec_free
   cc1: some warnings being treated as errors

vim +728 drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c

   677	
   678	struct msm_kms *mdp5_kms_init(struct drm_device *dev)
   679	{
   680		struct msm_drm_private *priv = dev->dev_private;
   681		struct platform_device *pdev;
   682		struct mdp5_kms *mdp5_kms;
   683		struct mdp5_cfg *config;
   684		struct msm_kms *kms;
   685		struct msm_gem_address_space *aspace;
   686		int irq, i, ret;
   687		struct device *iommu_dev;
   688	
   689		/* priv->kms would have been populated by the MDP5 driver */
   690		kms = priv->kms;
   691		if (!kms)
   692			return NULL;
   693	
   694		mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
   695	
   696		mdp_kms_init(&mdp5_kms->base, &kms_funcs);
   697	
   698		pdev = mdp5_kms->pdev;
   699	
   700		irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
   701		if (irq < 0) {
   702			ret = irq;
   703			DRM_DEV_ERROR(&pdev->dev, "failed to get irq: %d\n", ret);
   704			goto fail;
   705		}
   706	
   707		kms->irq = irq;
   708	
   709		config = mdp5_cfg_get_config(mdp5_kms->cfg);
   710	
   711		/* make sure things are off before attaching iommu (bootloader could
   712		 * have left things on, in which case we'll start getting faults if
   713		 * we don't disable):
   714		 */
   715		pm_runtime_get_sync(&pdev->dev);
   716		for (i = 0; i < MDP5_INTF_NUM_MAX; i++) {
   717			if (mdp5_cfg_intf_is_virtual(config->hw->intf.connect[i]) ||
   718			    !config->hw->intf.base[i])
   719				continue;
   720			mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(i), 0);
   721	
   722			mdp5_write(mdp5_kms, REG_MDP5_INTF_FRAME_LINE_COUNT_EN(i), 0x3);
   723		}
   724		mdelay(16);
   725	
   726		if (config->platform.iommu) {
   727			iommu_dev = &pdev->dev;
 > 728			if (!dev_iommu_fwspec_get(iommu_dev))
   729				iommu_dev = iommu_dev->parent;
   730	
   731			aspace = msm_gem_address_space_create(iommu_dev,
   732					config->platform.iommu, "mdp5");
   733			if (IS_ERR(aspace)) {
   734				ret = PTR_ERR(aspace);
   735				goto fail;
   736			}
   737	
   738			kms->aspace = aspace;
   739	
   740			ret = aspace->mmu->funcs->attach(aspace->mmu);
   741			if (ret) {
   742				DRM_DEV_ERROR(&pdev->dev, "failed to attach iommu: %d\n",
   743					ret);
   744				goto fail;
   745			}
   746		} else {
   747			DRM_DEV_INFO(&pdev->dev,
   748				 "no iommu, fallback to phys contig buffers for scanout\n");
   749			aspace = NULL;
   750		}
   751	
   752		pm_runtime_put_sync(&pdev->dev);
   753	
   754		ret = modeset_init(mdp5_kms);
   755		if (ret) {
   756			DRM_DEV_ERROR(&pdev->dev, "modeset_init failed: %d\n", ret);
   757			goto fail;
   758		}
   759	
   760		dev->mode_config.min_width = 0;
   761		dev->mode_config.min_height = 0;
   762		dev->mode_config.max_width = 0xffff;
   763		dev->mode_config.max_height = 0xffff;
   764	
   765		dev->driver->get_vblank_timestamp = drm_calc_vbltimestamp_from_scanoutpos;
   766		dev->driver->get_scanout_position = mdp5_get_scanoutpos;
   767		dev->driver->get_vblank_counter = mdp5_get_vblank_counter;
   768		dev->max_vblank_count = 0; /* max_vblank_count is set on each CRTC */
   769		dev->vblank_disable_immediate = true;
   770	
   771		return kms;
   772	fail:
   773		if (kms)
   774			mdp5_kms_destroy(kms);
   775		return ERR_PTR(ret);
   776	}
   777	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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