From e95076f92ab942848ebb67d6fba18cd1bf0c1437 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Mon, 9 Oct 2023 15:35:57 +0530 Subject: [PATCH] memory: tegra: Set BPMP msg flags to reset IPC channels [ 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 Signed-off-by: Sumit Gupta Acked-by: Krzysztof Kozlowski Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin --- 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 9e5b5db..2845041 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); -- 2.7.4