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arm64: dts: ti: k3-am65-main: Fix DSS irq trigger type

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DSS irq trigger type is set to IRQ_TYPE_EDGE_RISING in the DT file, but
the TRM says it is level triggered.

For some reason triggering on rising edge results in double the amount
of expected interrupts, e.g. for normal page flipping test the number of
interrupts per second is 2 * fps. It is as if the IRQ triggers on both
edges. There are no other side effects to this issue than slightly
increased CPU & power consumption due to the extra interrupt.

Switching to IRQ_TYPE_LEVEL_HIGH is correct and fixes the issue, so
let's do that.

Fixes: fc539b90ed ("arm64: dts: ti: am654: Add DSS node")
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Aradhya Bhatia <a-bhatia1@ti.com>
Link: https://lore.kernel.org/r/20231106-am65-dss-clk-edge-v1-1-4a959fec0e1e@ideasonboard.com
Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Tomi Valkeinen 2023-11-06 11:57:48 +02:00 committed by Nishanth Menon
parent 7dc4af358c
commit b571608592
1 changed files with 1 additions and 1 deletions
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arch/arm64/boot/dts/ti/k3-am65-main.dtsi
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@ -1034,7 +1034,7 @@ dss: dss@4a00000 {
assigned-clocks = <&k3_clks 67 2>;
assigned-clock-parents = <&k3_clks 67 5>;
interrupts = <GIC_SPI 166 IRQ_TYPE_EDGE_RISING>;
interrupts = <GIC_SPI 166 IRQ_TYPE_LEVEL_HIGH>;
dma-coherent;