msm_geni: Suppress UART TX when debug cable is disconnected - #130
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aswinm94 wants to merge 2 commits into
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msm_geni: Suppress UART TX when debug cable is disconnected#130aswinm94 wants to merge 2 commits into
aswinm94 wants to merge 2 commits into
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Add MSM_GENI_SERIAL_CABLE_DETECT Kconfig option and detect a persistent RX-line BREAK condition (no S_GP_IRQ_3 after S_GP_IRQ_2) to identify a disconnected debug UART cable, and suppress TX output in that case to avoid driving an unterminated line. Signed-off-by: Aswin Murugan <aswin.murugan@oss.qualcomm.com>
Enable CONFIG_MSM_GENI_SERIAL_CABLE_DETECT in qcom_defconfig by default. Signed-off-by: Aswin Murugan <aswin.murugan@oss.qualcomm.com>
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This PR adds support for detecting a disconnected debug UART cable
on Qualcomm platforms and suppressing serial transmission when no cable
is present.
upstream-link: https://lore.kernel.org/u-boot/20260827073436.4113558-1-aswin.murugan@oss.qualcomm.com/