tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   4ebf8d7649cd86c41c41bf48da4b7761da2d5009
commit: de3916c70a24e3e1bdbf6b0a77d75b069d8953d9 drm/msm/dpu: Track resources 
in global state
date:   4 months ago
config: arm-randconfig-r026-20200717 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget 
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout de3916c70a24e3e1bdbf6b0a77d75b069d8953d9
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c: In function 
'dpu_encoder_virt_mode_set':
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c:959:30: warning: variable 
>> 'topology' set but not used [-Wunused-but-set-variable]
     959 |  struct msm_display_topology topology;
         |                              ^~~~~~~~

vim +/topology +959 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c

25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   946  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   947  static void 
dpu_encoder_virt_mode_set(struct drm_encoder *drm_enc,
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   948                               
      struct drm_display_mode *mode,
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   949                               
      struct drm_display_mode *adj_mode)
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   950  {
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   951       struct dpu_encoder_virt 
*dpu_enc;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   952       struct msm_drm_private 
*priv;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   953       struct dpu_kms *dpu_kms;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   954       struct list_head 
*connector_list;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   955       struct drm_connector 
*conn = NULL, *conn_iter;
c2ab55a68a3374 Jeykumar Sankaran 2019-02-13   956       struct drm_crtc 
*drm_crtc;
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13   957       struct dpu_crtc_state 
*cstate;
de3916c70a24e3 Drew Davenport    2020-02-19   958       struct dpu_global_state 
*global_state;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  @959       struct 
msm_display_topology topology;
b954fa6baaca7a Drew Davenport    2020-02-19   960       struct dpu_hw_blk 
*hw_pp[MAX_CHANNELS_PER_ENC];
b954fa6baaca7a Drew Davenport    2020-02-19   961       struct dpu_hw_blk 
*hw_ctl[MAX_CHANNELS_PER_ENC];
b954fa6baaca7a Drew Davenport    2020-02-19   962       struct dpu_hw_blk 
*hw_lm[MAX_CHANNELS_PER_ENC];
b954fa6baaca7a Drew Davenport    2020-02-19   963       int num_lm, num_ctl, 
num_pp;
de3916c70a24e3 Drew Davenport    2020-02-19   964       int i, j;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   965  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   966       if (!drm_enc) {
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   967               
DPU_ERROR("invalid encoder\n");
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   968               return;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   969       }
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   970  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   971       dpu_enc = 
to_dpu_encoder_virt(drm_enc);
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   972       DPU_DEBUG_ENC(dpu_enc, 
"\n");
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   973  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   974       priv = 
drm_enc->dev->dev_private;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   975       dpu_kms = 
to_dpu_kms(priv->kms);
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   976       connector_list = 
&dpu_kms->dev->mode_config.connector_list;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   977  
de3916c70a24e3 Drew Davenport    2020-02-19   978       global_state = 
dpu_kms_get_existing_global_state(dpu_kms);
de3916c70a24e3 Drew Davenport    2020-02-19   979       if 
(IS_ERR_OR_NULL(global_state)) {
de3916c70a24e3 Drew Davenport    2020-02-19   980               
DPU_ERROR("Failed to get global state");
de3916c70a24e3 Drew Davenport    2020-02-19   981               return;
de3916c70a24e3 Drew Davenport    2020-02-19   982       }
de3916c70a24e3 Drew Davenport    2020-02-19   983  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   984       
trace_dpu_enc_mode_set(DRMID(drm_enc));
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   985  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   986       
list_for_each_entry(conn_iter, connector_list, head)
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   987               if 
(conn_iter->encoder == drm_enc)
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   988                       conn = 
conn_iter;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   989  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   990       if (!conn) {
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   991               
DPU_ERROR_ENC(dpu_enc, "failed to find attached connector\n");
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   992               return;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   993       } else if 
(!conn->state) {
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   994               
DPU_ERROR_ENC(dpu_enc, "invalid connector state\n");
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   995               return;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   996       }
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27   997  
c2ab55a68a3374 Jeykumar Sankaran 2019-02-13   998       
drm_for_each_crtc(drm_crtc, drm_enc->dev)
c2ab55a68a3374 Jeykumar Sankaran 2019-02-13   999               if 
(drm_crtc->state->encoder_mask & drm_encoder_mask(drm_enc))
c2ab55a68a3374 Jeykumar Sankaran 2019-02-13  1000                       break;
c2ab55a68a3374 Jeykumar Sankaran 2019-02-13  1001  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1002       topology = 
dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode);
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1003  
de3916c70a24e3 Drew Davenport    2020-02-19  1004       /* Query resource that 
have been reserved in atomic check step. */
de3916c70a24e3 Drew Davenport    2020-02-19  1005       num_pp = 
dpu_rm_get_assigned_resources(&dpu_kms->rm, global_state,
de3916c70a24e3 Drew Davenport    2020-02-19  1006               
drm_enc->base.id, DPU_HW_BLK_PINGPONG, hw_pp,
de3916c70a24e3 Drew Davenport    2020-02-19  1007               
ARRAY_SIZE(hw_pp));
de3916c70a24e3 Drew Davenport    2020-02-19  1008       num_ctl = 
dpu_rm_get_assigned_resources(&dpu_kms->rm, global_state,
de3916c70a24e3 Drew Davenport    2020-02-19  1009               
drm_enc->base.id, DPU_HW_BLK_CTL, hw_ctl, ARRAY_SIZE(hw_ctl));
de3916c70a24e3 Drew Davenport    2020-02-19  1010       num_lm = 
dpu_rm_get_assigned_resources(&dpu_kms->rm, global_state,
de3916c70a24e3 Drew Davenport    2020-02-19  1011               
drm_enc->base.id, DPU_HW_BLK_LM, hw_lm, ARRAY_SIZE(hw_lm));
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1012  
b954fa6baaca7a Drew Davenport    2020-02-19  1013       for (i = 0; i < 
MAX_CHANNELS_PER_ENC; i++)
b954fa6baaca7a Drew Davenport    2020-02-19  1014               
dpu_enc->hw_pp[i] = i < num_pp ? to_dpu_hw_pingpong(hw_pp[i])
b954fa6baaca7a Drew Davenport    2020-02-19  1015                               
                : NULL;
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1016  
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1017       cstate = 
to_dpu_crtc_state(drm_crtc->state);
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1018  
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1019       for (i = 0; i < num_lm; 
i++) {
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1020               int ctl_idx = 
(i < num_ctl) ? i : (num_ctl-1);
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1021  
b954fa6baaca7a Drew Davenport    2020-02-19  1022               
cstate->mixers[i].hw_lm = to_dpu_hw_mixer(hw_lm[i]);
b954fa6baaca7a Drew Davenport    2020-02-19  1023               
cstate->mixers[i].lm_ctl = to_dpu_hw_ctl(hw_ctl[ctl_idx]);
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1024       }
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1025  
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1026       cstate->num_mixers = 
num_lm;
b107603b4ad0f2 Jeykumar Sankaran 2019-02-13  1027  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1028       for (i = 0; i < 
dpu_enc->num_phys_encs; i++) {
b954fa6baaca7a Drew Davenport    2020-02-19  1029               int num_blk;
b954fa6baaca7a Drew Davenport    2020-02-19  1030               struct 
dpu_hw_blk *hw_blk[MAX_CHANNELS_PER_ENC];
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1031               struct 
dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1032  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1033               if 
(!dpu_enc->hw_pp[i]) {
b6fadcade62704 Drew Davenport    2019-12-06  1034                       
DPU_ERROR_ENC(dpu_enc,
b6fadcade62704 Drew Davenport    2019-12-06  1035                               
"no pp block assigned at idx: %d\n", i);
de3916c70a24e3 Drew Davenport    2020-02-19  1036                       return;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1037               }
3f4db2e2cc4128 Jeykumar Sankaran 2018-09-05  1038  
3f4db2e2cc4128 Jeykumar Sankaran 2018-09-05  1039               if (!hw_ctl[i]) 
{
b6fadcade62704 Drew Davenport    2019-12-06  1040                       
DPU_ERROR_ENC(dpu_enc,
b6fadcade62704 Drew Davenport    2019-12-06  1041                               
"no ctl block assigned at idx: %d\n", i);
de3916c70a24e3 Drew Davenport    2020-02-19  1042                       return;
3f4db2e2cc4128 Jeykumar Sankaran 2018-09-05  1043               }
3f4db2e2cc4128 Jeykumar Sankaran 2018-09-05  1044  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1045               phys->hw_pp = 
dpu_enc->hw_pp[i];
b954fa6baaca7a Drew Davenport    2020-02-19  1046               phys->hw_ctl = 
to_dpu_hw_ctl(hw_ctl[i]);
3f4db2e2cc4128 Jeykumar Sankaran 2018-09-05  1047  
b954fa6baaca7a Drew Davenport    2020-02-19  1048               num_blk = 
dpu_rm_get_assigned_resources(&dpu_kms->rm,
de3916c70a24e3 Drew Davenport    2020-02-19  1049                       
global_state, drm_enc->base.id, DPU_HW_BLK_INTF,
de3916c70a24e3 Drew Davenport    2020-02-19  1050                       hw_blk, 
ARRAY_SIZE(hw_blk));
b954fa6baaca7a Drew Davenport    2020-02-19  1051               for (j = 0; j < 
num_blk; j++) {
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1052                       struct 
dpu_hw_intf *hw_intf;
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1053  
b954fa6baaca7a Drew Davenport    2020-02-19  1054                       hw_intf 
= to_dpu_hw_intf(hw_blk[i]);
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1055                       if 
(hw_intf->idx == phys->intf_idx)
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1056                               
phys->hw_intf = hw_intf;
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1057               }
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1058  
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1059               if 
(!phys->hw_intf) {
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1060                       
DPU_ERROR_ENC(dpu_enc,
b6fadcade62704 Drew Davenport    2019-12-06  1061                               
      "no intf block assigned at idx: %d\n", i);
de3916c70a24e3 Drew Davenport    2020-02-19  1062                       return;
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1063               }
9d4c8fd1af4687 Jeykumar Sankaran 2019-02-13  1064  
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1065               phys->connector 
= conn->state->connector;
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1066               if 
(phys->ops.mode_set)
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1067                       
phys->ops.mode_set(phys, mode, adj_mode);
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1068       }
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1069  }
25fdd5933e4c0f Jeykumar Sankaran 2018-06-27  1070  

:::::: The code at line 959 was first introduced by commit
:::::: 25fdd5933e4c0f5fe2ea5cd59994f8ac5fbe90ef drm/msm: Add SDM845 DPU support

:::::: TO: Jeykumar Sankaran <jsa...@codeaurora.org>
:::::: CC: Sean Paul <seanp...@chromium.org>

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

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