disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv40.c
..
..
@@ -81,6 +81,7 @@
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 	case 0x49:
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 	case 0x4b:
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 		nvkm_wr32(device, 0x002230, 0x00000001);
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+		fallthrough;
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 	case 0x40:
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 	case 0x41:
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 	case 0x42: