Thread (34 messages) 34 messages, 4 authors, 2021-02-09
STALE1951d LANDED
Revisions (2)
  1. v1 [diff vs current]
  2. v2 current

[PATCH v2 09/11] clk: qcom: mmcc-msm8998: Set bimc_smmu_gdsc always on

From: AngeloGioacchino Del Regno <hidden>
Date: 2021-01-14 22:13:41
Also in: linux-arm-msm, linux-clk, lkml, phone-devel
Subsystem: arm/qualcomm mailing list, common clk framework, qualcomm clock drivers, the rest · Maintainers: Michael Turquette, Stephen Boyd, Bjorn Andersson, Linus Torvalds

This GDSC enables (or cuts!) power to the Multimedia Subsystem IOMMU
(mmss smmu), which has bootloader pre-set secure contexts.
In the event of a complete power loss, the secure contexts will be
reset and the hypervisor will crash the SoC.

To prevent this, and get a working multimedia subsystem, set this
GDSC as always on.

Signed-off-by: AngeloGioacchino Del Regno <redacted>
---
 drivers/clk/qcom/mmcc-msm8998.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/clk/qcom/mmcc-msm8998.c b/drivers/clk/qcom/mmcc-msm8998.c
index f9510a248a36..b49c4137b7d7 100644
--- a/drivers/clk/qcom/mmcc-msm8998.c
+++ b/drivers/clk/qcom/mmcc-msm8998.c
@@ -2663,7 +2663,7 @@ static struct gdsc bimc_smmu_gdsc = {
 		.name = "bimc_smmu",
 	},
 	.pwrsts = PWRSTS_OFF_ON,
-	.flags = HW_CTRL,
+	.flags = HW_CTRL | ALWAYS_ON,
 };
 
 static struct clk_regmap *mmcc_msm8998_clocks[] = {
-- 
2.29.2
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