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memory: tegra: Set BPMP msg flags to reset IPC channels

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[ Upstream commit f344675a34383ae26a8230f4b1cd99cbd0defebd ]

Set the 'TEGRA_BPMP_MESSAGE_RESET' bit in newly added 'flags' field
of 'struct tegra_bpmp_message' to request for the reset of BPMP IPC
channels. This is used along with the 'suspended' check in BPMP driver
for handling early bandwidth requests due to the hotplug of CPU's
during system resume before the driver gets resumed.

Fixes: f41e1442ac ("cpufreq: tegra194: add OPP support and set bandwidth")
Co-developed-by: Sumit Gupta <sumitg@nvidia.com>
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thierry Reding 2023-10-09 15:35:57 +05:30 • committed by Greg Kroah-Hartman
parent 9c9312fccd
commit e95076f92a
1 changed files with 4 additions and 0 deletions
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4
drivers/memory/tegra/tegra234.c
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@ -986,6 +986,10 @@ static int tegra234_mc_icc_set(struct icc_node *src, struct icc_node *dst)
msg.rx.data = &bwmgr_resp;
msg.rx.size = sizeof(bwmgr_resp);
if (pclient->bpmp_id >= TEGRA_ICC_BPMP_CPU_CLUSTER0 &&
pclient->bpmp_id <= TEGRA_ICC_BPMP_CPU_CLUSTER2)
msg.flags = TEGRA_BPMP_MESSAGE_RESET;
ret = tegra_bpmp_transfer(mc->bpmp, &msg);
if (ret < 0) {
dev_err(mc->dev, "BPMP transfer failed: %d\n", ret);