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a=openpgp-sha256; l=1512; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=+RccpUJwmpU1LzXIIE+Z5WpSTFsSjxa720tthk/FtD0=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBmYCgis+/VKxDqB8zWqxyQONbpETW/6Otdc520y t/JSEqJ7kuJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZmAoIgAKCRCLPIo+Aiko 1WzvCACxWQwjy6Y1HEw34Nq/jHm0FQPEq7DB5kpZtlaCtNTGX1h+F6lm9acHSt9goc2DzP/vT60 qusJWxBa09VZQWZMdI1GP1x0YZZrfXQmhtKO5WV1FwrgXEiAVHfZPX9UFK0JfsBCRZFSASmqQBc dMPrFeacZrGdrWjwIo53MMFvyIIdTXD9MaxTOX08PIH11UnHl11AKC4bUD4vGS49ztCLUeizOHZ t62hy4JK/I+1PVvdJbGtKojLz2fXTirx6OdSoLfvMD7LrBKbsOUCwGjatfb8UEt4mY/igMCTF9C oDTeci0yTEEv0f7Du8rtyOD3UTEBdeequCUrtjdt4vRaqud9 X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A On the Qualcomm RB1 platform the I2C bus connected to the LT9611UXC bridge under some circumstances can go into a state when all transfers timeout. This causes both issues with fetching of EDID and with updating of the bridge's firmware. While we are debugging the issue, switch corresponding I2C bus to use i2c-gpio driver. While using i2c-gpio no communication issues are observed. This patch is asusmed to be a temporary fix, so it is implemented in a non-intrusive manner to simply reverting it later. Fixes: 616eda24edd4 ("arm64: dts: qcom: qrb2210-rb1: Set up HDMI") Cc: stable@vger.kernel.org Signed-off-by: Dmitry Baryshkov --- arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts index bb5191422660..8c27d52139a1 100644 --- a/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts +++ b/arch/arm64/boot/dts/qcom/qrb2210-rb1.dts @@ -59,6 +59,17 @@ hdmi_con: endpoint { }; }; + i2c2_gpio: i2c { + compatible = "i2c-gpio"; + + sda-gpios = <&tlmm 6 GPIO_ACTIVE_HIGH>; + scl-gpios = <&tlmm 7 GPIO_ACTIVE_HIGH>; + #address-cells = <1>; + #size-cells = <0>; + + status = "disabled"; + }; + leds { compatible = "gpio-leds"; @@ -199,7 +210,7 @@ &gpi_dma0 { status = "okay"; }; -&i2c2 { +&i2c2_gpio { clock-frequency = <400000>; status = "okay";