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iommu/mediatek: Always enable the clk on resume
In mtk_iommu_runtime_resume always enable the clk, even
if m4u_dom is null. Otherwise the 'suspend' cb might
disable the clk which is already disabled causing the warning:
[ 1.586104] infra_m4u already disabled
[ 1.586133] WARNING: CPU: 0 PID: 121 at drivers/clk/clk.c:952 clk_core_disable+0xb0/0xb8
[ 1.594391] mtk-iommu 10205000.iommu: bound 18001000.larb (ops mtk_smi_larb_component_ops)
[ 1.598108] Modules linked in:
[ 1.598114] CPU: 0 PID: 121 Comm: kworker/0:2 Not tainted 5.12.0-rc5 #69
[ 1.609246] mtk-iommu 10205000.iommu: bound 14027000.larb (ops mtk_smi_larb_component_ops)
[ 1.617487] Hardware name: Google Elm (DT)
[ 1.617491] Workqueue: pm pm_runtime_work
[ 1.620545] mtk-iommu 10205000.iommu: bound 19001000.larb (ops mtk_smi_larb_component_ops)
[ 1.627229] pstate: 60000085 (nZCv daIf -PAN -UAO -TCO BTYPE=--)
[ 1.659297] pc : clk_core_disable+0xb0/0xb8
[ 1.663475] lr : clk_core_disable+0xb0/0xb8
[ 1.667652] sp : ffff800011b9bbe0
[ 1.670959] x29: ffff800011b9bbe0 x28: 0000000000000000
[ 1.676267] x27: ffff800011448000 x26: ffff8000100cfd98
[ 1.681574] x25: ffff800011b9bd48 x24: 0000000000000000
[ 1.686882] x23: 0000000000000000 x22: ffff8000106fad90
[ 1.692189] x21: 000000000000000a x20: ffff0000c0048500
[ 1.697496] x19: ffff0000c0048500 x18: ffffffffffffffff
[ 1.702804] x17: 0000000000000000 x16: 0000000000000000
[ 1.708112] x15: ffff800011460300 x14: fffffffffffe0000
[ 1.713420] x13: ffff8000114602d8 x12: 0720072007200720
[ 1.718727] x11: 0720072007200720 x10: 0720072007200720
[ 1.724035] x9 : ffff800011b9bbe0 x8 : ffff800011b9bbe0
[ 1.729342] x7 : 0000000000000009 x6 : ffff8000114b8328
[ 1.734649] x5 : 0000000000000000 x4 : 0000000000000000
[ 1.739956] x3 : 00000000ffffffff x2 : ffff800011460298
[ 1.745263] x1 : 1af1d7de276f4500 x0 : 0000000000000000
[ 1.750572] Call trace:
[ 1.753010] clk_core_disable+0xb0/0xb8
[ 1.756840] clk_core_disable_lock+0x24/0x40
[ 1.761105] clk_disable+0x20/0x30
[ 1.764501] mtk_iommu_runtime_suspend+0x88/0xa8
[ 1.769114] pm_generic_runtime_suspend+0x2c/0x48
[ 1.773815] __rpm_callback+0xe0/0x178
[ 1.777559] rpm_callback+0x24/0x88
[ 1.781041] rpm_suspend+0xdc/0x470
[ 1.784523] rpm_idle+0x12c/0x170
[ 1.787831] pm_runtime_work+0xa8/0xc0
[ 1.791573] process_one_work+0x1e8/0x360
[ 1.795580] worker_thread+0x44/0x478
[ 1.799237] kthread+0x150/0x158
[ 1.802460] ret_from_fork+0x10/0x30
[ 1.806034] ---[ end trace 82402920ef64573b ]---
[ 1.810728] ------------[ cut here ]------------
In addition, we now don't need to enable the clock from the
function mtk_iommu_hw_init since it is already enabled by the resume.
Fixes: c0b57581b7
("iommu/mediatek: Add power-domain operation")
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Yong Wu <yong.wu@mediatek.com>
Link: https://lore.kernel.org/r/20210416105449.4744-1-dafna.hirschfeld@collabora.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
parent
18d8c74ec5
commit
b34ea31fe0
1 changed files with 8 additions and 11 deletions
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@ -690,13 +690,6 @@ static const struct iommu_ops mtk_iommu_ops = {
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static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
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{
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u32 regval;
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int ret;
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ret = clk_prepare_enable(data->bclk);
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if (ret) {
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dev_err(data->dev, "Failed to enable iommu bclk(%d)\n", ret);
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return ret;
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}
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if (data->plat_data->m4u_plat == M4U_MT8173) {
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regval = F_MMU_PREFETCH_RT_REPLACE_MOD |
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@ -762,7 +755,6 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
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if (devm_request_irq(data->dev, data->irq, mtk_iommu_isr, 0,
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dev_name(data->dev), (void *)data)) {
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writel_relaxed(0, data->base + REG_MMU_PT_BASE_ADDR);
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clk_disable_unprepare(data->bclk);
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dev_err(data->dev, "Failed @ IRQ-%d Request\n", data->irq);
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return -ENODEV;
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}
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@ -979,14 +971,19 @@ static int __maybe_unused mtk_iommu_runtime_resume(struct device *dev)
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void __iomem *base = data->base;
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int ret;
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/* Avoid first resume to affect the default value of registers below. */
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if (!m4u_dom)
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return 0;
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ret = clk_prepare_enable(data->bclk);
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if (ret) {
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dev_err(data->dev, "Failed to enable clk(%d) in resume\n", ret);
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return ret;
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}
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/*
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* Uppon first resume, only enable the clk and return, since the values of the
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* registers are not yet set.
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*/
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if (!m4u_dom)
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return 0;
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writel_relaxed(reg->wr_len_ctrl, base + REG_MMU_WR_LEN_CTRL);
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writel_relaxed(reg->misc_ctrl, base + REG_MMU_MISC_CTRL);
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writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS);
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