From f86114913085e33716e183c51ecd6849701f3ac2 Mon Sep 17 00:00:00 2001 From: AngeloGioacchino Del Regno Date: Thu, 14 Jan 2021 23:10:53 +0100 Subject: [PATCH] clk: qcom: gcc-msm8998: Mark gpu_cfg_ahb_clk as critical The GPU IOMMU depends on this clock and the hypervisor will crash the SoC if this clock gets disabled because the secure contexts that have been set on this IOMMU by the bootloader will become unaccessible (or they get reset). Mark this clock as critical to avoid this issue when the Adreno GPU is enabled. Signed-off-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20210114221059.483390-6-angelogioacchino.delregno@somainline.org Signed-off-by: Stephen Boyd --- drivers/clk/qcom/gcc-msm8998.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/clk/qcom/gcc-msm8998.c b/drivers/clk/qcom/gcc-msm8998.c index c8d4c0348952..afea60a3ef43 100644 --- a/drivers/clk/qcom/gcc-msm8998.c +++ b/drivers/clk/qcom/gcc-msm8998.c @@ -2081,6 +2081,12 @@ static struct clk_branch gcc_gpu_cfg_ahb_clk = { .hw.init = &(struct clk_init_data){ .name = "gcc_gpu_cfg_ahb_clk", .ops = &clk_branch2_ops, + /* + * The GPU IOMMU depends on this clock and hypervisor + * will crash the SoC if this clock goes down, due to + * secure contexts protection. + */ + .flags = CLK_IS_CRITICAL, }, }, }; -- GitLab