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memory: tegra: Increase handshake timeout on Tegra20

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Turned out that it could take over a millisecond under some circumstances,
like running on a very low CPU/memory frequency. TRM says that handshake
happens when there is a "safe" moment, but not explains exactly what that
moment is. Apparently at least memory should be idling and thus the low
frequency should be a reasonable cause for a longer handshake delay.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Dmitry Osipenko 2019-08-12 00:00:35 +03:00 committed by Thierry Reding
parent f541efaa74
commit b56563d013
1 changed files with 1 additions and 1 deletions
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2
drivers/memory/tegra/tegra20-emc.c
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@ -236,7 +236,7 @@ static int emc_complete_timing_change(struct tegra_emc *emc, bool flush)
} }
timeout = wait_for_completion_timeout(&emc->clk_handshake_complete, timeout = wait_for_completion_timeout(&emc->clk_handshake_complete,
usecs_to_jiffies(100)); msecs_to_jiffies(100));
if (timeout == 0) { if (timeout == 0) {
dev_err(emc->dev, "EMC-CAR handshake failed\n"); dev_err(emc->dev, "EMC-CAR handshake failed\n");
return -EIO; return -EIO;