6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thierry Reding <treding@xxxxxxxxxx>
[ 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: f41e1442ac5b ("cpufreq: tegra194: add OPP support and set bandwidth")
Co-developed-by: Sumit Gupta <sumitg@xxxxxxxxxx>
Signed-off-by: Sumit Gupta <sumitg@xxxxxxxxxx>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/memory/tegra/tegra234.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/memory/tegra/tegra234.c b/drivers/memory/tegra/tegra234.c
index 9e5b5dbd9c8df..2845041f32d69 100644
--- a/drivers/memory/tegra/tegra234.c
+++ b/drivers/memory/tegra/tegra234.c
@@ -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);
--
2.42.0
