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drm/tegra: falcon: Wait for memory scrubbing to complete

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Before booting the Falcon processor, make sure to wait for memory
scrubbing to complete.

Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2018-11-23 13:06:39 +01:00
parent 4eab8c0ebd
commit b91bf997ea
1 changed files with 8 additions and 0 deletions
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8
drivers/gpu/drm/tegra/falcon.c
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@ -197,11 +197,19 @@ void falcon_exit(struct falcon *falcon)
int falcon_boot(struct falcon *falcon)
{
unsigned long offset;
u32 value;
int err;
if (!falcon->firmware.vaddr)
return -EINVAL;
err = readl_poll_timeout(falcon->regs + FALCON_DMACTL, value,
(value & (FALCON_DMACTL_IMEM_SCRUBBING |
FALCON_DMACTL_DMEM_SCRUBBING)) == 0,
10, 10000);
if (err < 0)
return err;
falcon_writel(falcon, 0, FALCON_DMACTL);
/* setup the address of the binary data so Falcon can access it later */