| Message ID | 20190520134817.25435-2-narmstrong@baylibre.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | arm64: dts: meson: g12a: add drive strength and hwrng | expand |
On Mon, May 20, 2019 at 3:48 PM Neil Armstrong <narmstrong@baylibre.com> wrote: > > With the default boot settings, the DDC drive strength is too weak, > set the driver-strengh to 4mA to avoid errors on the DDC line. > > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Amlogic's vendor kernel (from buildroot-openlinux-A113-201901) does the same so: Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes: > On Mon, May 20, 2019 at 3:48 PM Neil Armstrong <narmstrong@baylibre.com> wrote: >> >> With the default boot settings, the DDC drive strength is too weak, >> set the driver-strengh to 4mA to avoid errors on the DDC line. >> >> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> > Amlogic's vendor kernel (from buildroot-openlinux-A113-201901) does the same so: > Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Queued for v5.3, Kevin
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi index 5b4942c73e65..aa678d92238b 100644 --- a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi @@ -327,6 +327,7 @@ "hdmitx_sck"; function = "hdmitx"; bias-disable; + drive-strength-microamp = <4000>; }; };
With the default boot settings, the DDC drive strength is too weak, set the driver-strengh to 4mA to avoid errors on the DDC line. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> --- arch/arm64/boot/dts/amlogic/meson-g12a.dtsi | 1 + 1 file changed, 1 insertion(+)