From: Peng Fan <peng.fan@nxp.com>
On i.MX8QM, HDMI LPCG clocks operation needs SCU clock "hdmi_ipg_clk"
to be ON. While during noirq suspend phase, "hdmi_ipg_clk" is disabled
by HDMI IRQ STEER driver, so SError will be triggered when accessing
the HDMI LPCG registers.
Skip all HDMI LPCG clocks save/restore to avoid SError during
system suspend/resume, it will NOT introduce additional power consumption
as their parent clock is disabled when suspend.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/clk/imx/clk-lpcg-scu.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/clk/imx/clk-lpcg-scu.c b/drivers/clk/imx/clk-lpcg-scu.c
index 2cffec0c42dccc256e8dc5e9181952e250870a76..466c0de11ca7d5af42a5ec34fb197dc90b1742b1 100644
--- a/drivers/clk/imx/clk-lpcg-scu.c
+++ b/drivers/clk/imx/clk-lpcg-scu.c
@@ -162,6 +162,9 @@ static int __maybe_unused imx_clk_lpcg_scu_suspend(struct device *dev)
{
struct clk_lpcg_scu *clk = dev_get_drvdata(dev);
+ if (!strncmp("hdmi_lpcg", clk_hw_get_name(&clk->hw), strlen("hdmi_lpcg")))
+ return 0;
+
clk->state = readl_relaxed(clk->reg);
dev_dbg(dev, "save lpcg state 0x%x\n", clk->state);
@@ -172,6 +175,9 @@ static int __maybe_unused imx_clk_lpcg_scu_resume(struct device *dev)
{
struct clk_lpcg_scu *clk = dev_get_drvdata(dev);
+ if (!strncmp("hdmi_lpcg", clk_hw_get_name(&clk->hw), strlen("hdmi_lpcg")))
+ return 0;
+
/*
* FIXME: Sometimes writes don't work unless the CPU issues
* them twice
--
2.37.1