without the obj[0] set, we can see the following panic:
[ 29.236764] pstate: 20400009 (nzCv daif +PAN -UAO)
[ 29.241532] pc : drm_gem_vram_offset+0x10/0x28 [drm_vram_helper]
[ 29.247511] lr : hibmc_plane_atomic_update+0x30/0xe0 [hibmc_drm]
[ 29.253490] sp : ffff003fab713a50
[ 29.256789] x29: ffff003fab713a50 x28: 0000000000000028
[ 29.262077] x27: 0000000000000018 x26: 0000aaaaced52780
[ 29.267363] x25: ffff203f98dcde00 x24: 0000000000000001
[ 29.272650] x23: 0000000000000001 x22: 0000000000000000
[ 29.277937] x21: 0000000000000000 x20: ffff002fb4899580
[ 29.283224] x19: ffff003fb8767c00 x18: 0000000000000000
[ 29.288510] x17: 0000000000000000 x16: 0000000000000000
[ 29.293797] x15: 0000000000000010 x14: 332d4341443a3433
[ 29.299084] x13: 3a5245444f434e45 x12: 5b206e6f20746573
[ 29.304371] x11: 65646f6d205d7365 x10: 6c62617369645f74
[ 29.309657] x9 : ffff800008e4d650 x8 : ffff8000107241d0
[ 29.314944] x7 : 0000000000000000 x6 : ffff003fb8766400
[ 29.320231] x5 : ffff003fb8767c00 x4 : ffff800008e4f320
[ 29.325517] x3 : ffff002fb3ae5080 x2 : ffff002fb3ae0000
[ 29.330804] x1 : 0000000000000000 x0 : ffff002fb07f5c00
[ 29.336090] Call trace:
[ 29.338528] drm_gem_vram_offset+0x10/0x28 [drm_vram_helper]
[ 29.344160] drm_atomic_helper_commit_planes+0x144/0x228
[ 29.349447] drm_atomic_helper_commit_tail+0x38/0x78
[ 29.354389] commit_tail+0xb4/0x160
[ 29.357861] drm_atomic_helper_commit+0x134/0x168
[ 29.362543] drm_atomic_commit+0x50/0x60
[ 29.366448] drm_mode_atomic_ioctl+0x724/0xb00
[ 29.370871] drm_ioctl_kernel+0x98/0xe8
[ 29.374690] drm_ioctl+0x26c/0x3d0
[ 29.378077] do_vfs_ioctl+0xafc/0xbb0
[ 29.381722] ksys_ioctl+0x64/0x98
[ 29.385022] __arm64_sys_ioctl+0x24/0x50
[ 29.388929] el0_svc_common.constprop.3+0xf0/0x158
[ 29.393697] el0_svc_handler+0x68/0x80
[ 29.397429] el0_sync_handler+0xa8/0x198
[ 29.401333] el0_sync+0x140/0x180
[ 29.404632] ---[ end trace 4ba9406972d937dd ]---
[ 29.409245] Unexpected kernel BRK exception at EL1
Signed-off-by: Zhihui Chen <chenzhihui4@xxxxxxxxxx>
---
drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
index 21b684eab5c9..19dc525a73b0 100644
--- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
+++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
@@ -126,6 +126,7 @@ hibmc_framebuffer_init(struct drm_device *dev,
drm_helper_mode_fill_fb_struct(dev, &hibmc_fb->fb, mode_cmd);
hibmc_fb->obj = obj;
+ hibmc_fb->fb.obj[0] = obj;
ret = drm_framebuffer_init(dev, &hibmc_fb->fb, &hibmc_fb_funcs);
if (ret) {
DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
--
2.20.1
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