[v2] arm64: dts: qcom: switch RB1 and RB2 platforms to i2c2-gpio

[PATCH v2 0/2] arm64: dts: qcom: switch RB1 and RB2 platforms to i2c2-gpio

Posted by Dmitry Baryshkov 1 year, 8 months ago

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 <dmitry.baryshkov@linaro.org>
---
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 <dmitry.baryshkov@linaro.org>

Re: [PATCH v2 0/2] arm64: dts: qcom: switch RB1 and RB2 platforms to i2c2-gpio

Posted by Bjorn Andersson 1 year, 8 months ago

On Wed, 05 Jun 2024 11:55:55 +0300, Dmitry Baryshkov wrote:
> 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.
> 
> [...]

Applied, thanks!

[1/2] arm64: dts: qcom: qrb2210-rb1: switch I2C2 to i2c-gpio
      commit: b7b545ccc08873e107aa24c461b1fdb123dd3761
[2/2] arm64: dts: qcom: qrb4210-rb2: switch I2C2 to i2c-gpio
      commit: f77e7bd40c3c2d79685e9cc80de874b69a976f55

Best regards,
-- 
Bjorn Andersson <andersson@kernel.org>