drm/nvc0: backup bar3 channel on suspend (147cad09) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/gpu/drm/nouveau/nvc0_instmem.c

+22 −0

Original line number	Diff line number	Diff line
		@@ -141,12 +141,34 @@ nvc0_instmem_flush(struct drm_device *dev)
		int
		nvc0_instmem_suspend(struct drm_device *dev)
		{
		struct drm_nouveau_private *dev_priv = dev->dev_private;
		int i;

		dev_priv->susres.ramin_copy = vmalloc(65536);
		if (!dev_priv->susres.ramin_copy)
		return -ENOMEM;

		for (i = 0x700000; i < 0x710000; i += 4)
		dev_priv->susres.ramin_copy[i/4] = nv_rd32(dev, i);
		return 0;
		}

		void
		nvc0_instmem_resume(struct drm_device *dev)
		{
		struct drm_nouveau_private *dev_priv = dev->dev_private;
		u64 chan;
		int i;

		chan = dev_priv->vram_size - dev_priv->ramin_rsvd_vram;
		nv_wr32(dev, 0x001700, chan >> 16);

		for (i = 0x700000; i < 0x710000; i += 4)
		nv_wr32(dev, i, dev_priv->susres.ramin_copy[i/4]);
		vfree(dev_priv->susres.ramin_copy);
		dev_priv->susres.ramin_copy = NULL;

		nv_wr32(dev, 0x001714, 0xc0000000 \| (chan >> 12));
		}

		int