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authorMadhusudanarao Amara <madhusudanarao.amara@intel.com>2020-12-16 19:39:18 +0530
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-12-28 15:44:26 +0100
commit0f041b8592daaaea46e91a8ebb3b47e6e0171fd8 (patch)
tree2e0d68ccf1629e72d5de4535dc0ff2847220b62d /scripts/gdb/linux/utils.py
parent5e5ff0b4b6bcb4d17b7a26ec8bcfc7dd4651684f (diff)
usb: typec: intel_pmc_mux: Configure HPD first for HPD+IRQ request
Warm reboot scenarios some times type C Mux driver gets Mux configuration request as HPD=1,IRQ=1. In that scenario typeC Mux driver need to configure Mux as follows as per IOM requirement: (1). Confgiure Mux HPD = 1, IRQ = 0 (2). Configure Mux with HPD = 1, IRQ = 1 IOM expects TypeC Mux configuration as follows: (1). HPD=1, IRQ=0 (2). HPD=1, IRQ=1 if IOM gets mux config request (2) without configuring (1), it will ignore the request. The impact of this is there is no DP_alt mode display. Fixes: 43d596e32276 ("usb: typec: intel_pmc_mux: Check the port status before connect") Cc: stable@vger.kernel.org Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Madhusudanarao Amara <madhusudanarao.amara@intel.com> Link: https://lore.kernel.org/r/20201216140918.49197-1-madhusudanarao.amara@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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