| Message ID | 20230728173438.12995-2-a-bhatia1@ti.com |
|---|---|
| State | Accepted |
| Commit | 73387da70f9c26b6fba4f62371d013cce14663d9 |
| Headers | show |
| Series | arm64: ti: k3-am62: Add display support | expand |
diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi index 34c8ffc553ec..540ed8a0d7fb 100644 --- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi @@ -300,7 +300,7 @@ &main_i2c1 { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&main_i2c1_pins_default>; - clock-frequency = <400000>; + clock-frequency = <100000>; tlv320aic3106: audio-codec@1b { #sound-dai-cells = <0>;
The Display Data Channel (DDC) transactions between an HDMI transmitter (SIL9022A in this case) and an HDMI monitor, occur at a maximum of 100KHz. That's the maximum supported frequency within DDC standards. While the SIL9022A can transact with the core at 400KHz, it needs to drop the frequency to 100KHz when communicating with the monitor, otherwise, the i2c controller times out and shows warning like this. [ 985.773431] omap_i2c 20010000.i2c: controller timed out That feature, however, has not been enabled in the SIL9022 driver. Since, dropping the frequency doesn't affect any other devices on the bus, drop the main-i2c1 frequency from 400KHz to 100KHz. Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com> --- arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)