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charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIABsoYGYC/3XMQQ6CMBCF4auQWTtmOiAIK+9hWCC0ZRJDydQ0G sLdrexd/i953wbRqtgIXbGB2iRRwpKDTwWM87B4izLlBiauqKYK9WEYhUf2uEpAV1N5ccPVEjP k06rWyfsA733uWeIr6Ofwk/mtf6lkkNCVXLbUmKad2ttTlkHDOaiHft/3Lyn4F/utAAAA To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Caleb Connolly , Alexey Klimov , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dmitry Baryshkov , stable@vger.kernel.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1151; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=xOYeUtw/UrZkiwEhcQuZluKYKEI9dexCcW4rGGwOeHc=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBmYCgiB/VtaFHXC/qtLOr4Qw/YA9dgjSlyStAZl fsirDvhCFWJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZmAoIgAKCRCLPIo+Aiko 1SUbCAClRploP4ik86pltL/NkWfnLhFLBydG4je7rHAnCrj7FalYpiGDzOCGVUZ5NblS8jPCnDT QMW3qy9LwM3m38bf/ZiNKL7rvH6JqoBymyl1vl8We4zFJOhfto4S8zbLocIhlI8+Dm6bbfakAES 7oF0CY7DV0WQD+0Oz/Cxg6qkfxEeSjn8+B4taXF7TY88QNU66WbH96+w4juBheovolOeHC/yR8v IW+JDB+1j/Rptvd1BhbHgF5XShrXpvL8JqSWrDGKyG6ryRuubRRobl0NQmh+xJHXnDpgXJ516r1 mLFejs5CeviJaMvgrBU+E5IB2WATMpCxrbWipw86WLrkspVv X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A On the Qualcomm RB1 and RB2 platforms 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. Signed-off-by: Dmitry Baryshkov --- Changes in v2: - Fixed i2c node names to fix DT validation issues (Rob) - Link to v1: https://lore.kernel.org/r/20240604-rb12-i2c2g-pio-v1-0-f323907179d9@linaro.org --- Dmitry Baryshkov (2): arm64: dts: qcom: qrb2210-rb1: switch I2C2 to i2c-gpio arm64: dts: qcom: qrb4210-rb2: switch I2C2 to i2c-gpio arch/arm64/boot/dts/qcom/qrb2210-rb1.dts | 13 ++++++++++++- arch/arm64/boot/dts/qcom/qrb4210-rb2.dts | 13 ++++++++++++- 2 files changed, 24 insertions(+), 2 deletions(-) --- base-commit: 0e1980c40b6edfa68b6acf926bab22448a6e40c9 change-id: 20240604-rb12-i2c2g-pio-f6035fa8e022 Best regards, -- Dmitry Baryshkov