Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.13.6 2024-11-01T05:55:38+00:00 2024-11-01T05:55:38+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:20+00:00 urn:sha1:916f26f1c24cc0b538b222fc46f500950b942d99 Add support for the RX2 receiver which is used as the third receiver in asymmetric links. This requires expanding the results array for the additional third data word of the hardware margining results. Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-11-01T05:55:38+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:19+00:00 urn:sha1:750365ef8c1718de9a7b25799d69ac0ee13be275 Use ARRAY_SIZE() when available or pass in the array size derived from it. This is in preparation for adding another result data word for supporting Gen 4 asymmetric links with an additional lane. Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-11-01T05:55:38+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:18+00:00 urn:sha1:3499c0a992e432cb8a85616ff4a9019a8924c89a Make the result parsing and formatting code less repetitive in preparation for adding another result for Gen 4 asymmetric link support. Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-11-01T05:55:38+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:17+00:00 urn:sha1:3bf090e9d6df8805ca4d5222ce4d8a1e99ab6724 Replace the raw values and macros with an enum and use it consistently. No functional changes. Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-11-01T05:55:38+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:16+00:00 urn:sha1:e6c9905ff4d8f898c06bb30a37ac9ba21885dc26 With USB4 Gen 4, the link can be configured into an asymmetric mode, where there are three receivers and only one transmitter. The USB4 specification also uses the "all lanes" nomenclature instead of "both lanes". Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-11-01T05:55:38+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:15+00:00 urn:sha1:c8c08fd9c23b5e6a11336675b2584315f87001cc Add a debugfs knob for USB4 Gen 4 margining eye selection. Gen 4 uses 3-level pulse amplitude modulation (PAM3) which changes how margining measurements are made because PAM3 has two eyes per lane from which the margins can be measured. Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-11-01T05:55:37+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:14+00:00 urn:sha1:c9077d59adf43c9e9303e4651248839162fd9be6 Parse the Gen 4 specific capabilities. Change the return types of independent_voltage_margins() and independent_time_margins() to enums that distinguish between the Gen 2/3 and Gen 4 margins since they behave differently between generations. Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-11-01T05:55:37+00:00 Aapo Vienamo aapo.vienamo@iki.fi 2024-08-15T18:45:13+00:00 urn:sha1:480ebc2eb5b28474d2e1b780a826d5e8e8997a7a Use or pass ARRAY_SIZE() of the capabilities array instead of hardcoding it. USB4 Gen 4 introduces an additional data word, which requires expanding the capabilities array. Signed-off-by: Aapo Vienamo <aapo.vienamo@iki.fi> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-08-22T04:32:06+00:00 R Kannappan r.kannappan@intel.com 2024-07-19T18:37:20+00:00 urn:sha1:10904df3f20cf36e418e78ab73c2fbcecda512b8 USB4 specification defines the metadata needed to perform software margining, as well as the necessary steps which include waiting for dwell time. - Add dwell_time attribute to set the wait time while performing margining and checking for link errors. - Add error_counter attribute to configure error counter prior to margining test. - Add voltage_time_offset attribute to set the voltage or time offset steps before performing the software margining test. - Perform software margining test for dwell duration, break if there are link errors, stop the clocks and provide results. Below is a minimalistic example how this can be used. Note these values are just examples. The exact values in practice depend on host specific capabilities and the type of measurement to be performed. # cd /sys/kernel/debug/thunderbolt/ROUTER/portX/margining/ # echo software > mode # echo 400 > dwell_time # echo 1 > run As usual the results attribute contains the results of a succesfull run. Signed-off-by: R Kannappan <r.kannappan@intel.com> Co-developed-by: Rene Sapiens <rene.sapiens@intel.com> Signed-off-by: Rene Sapiens <rene.sapiens@intel.com> Co-developed-by: Aapo Vienamo <aapo.vienamo@linux.intel.com> Signed-off-by: Aapo Vienamo <aapo.vienamo@linux.intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> 2024-08-22T04:32:06+00:00 Rene Sapiens rene.sapiens@intel.com 2024-07-19T18:37:19+00:00 urn:sha1:9fafd46b39d140b7359b77e5fcc4c3130788df42 Add optional extended voltage offset range support for software and hardware margining as defined by the USB4 specification. If supported, it can be enabled like below: # cd /sys/kernel/debug/thunderbolt/ROUTER/portX/margining/ # echo Y > optional_voltage_offset Signed-off-by: Rene Sapiens <rene.sapiens@intel.com> Co-developed-by: R Kannappan <r.kannappan@intel.com> Signed-off-by: R Kannappan <r.kannappan@intel.com> Co-developed-by: Aapo Vienamo <aapo.vienamo@linux.intel.com> Signed-off-by: Aapo Vienamo <aapo.vienamo@linux.intel.com> Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>