dasharo/linux
0
0
Fork 0
mirror of https://github.com/Dasharo/linux.git synced 2026-03-06 15:25:10 -08:00
Code Issues Packages Projects Releases Wiki Activity

usb: typec: tcpm: Protocol Error handling

Browse Source 
PD3.0 Spec 6.8.1 describes how to handle Protocol Error. There are
general rules defined in Table 6-61 which regulate incoming Message
handling. If the incoming Message is unexpected, unsupported, or
unrecognized, Protocol Error occurs. Follow the rules to handle these
situations. Also consider PD2.0 connection (PD2.0 Spec Table 6-36) for
backward compatibilities.

To know the types of AMS in all the recipient's states, identify those
AMS who are initiated by the port partner but not yet recorded in the
current code.

Besides, introduce a new state CHUNK_NOT_SUPP to delay the NOT_SUPPORTED
message after receiving a chunked message.

Tested-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Kyle Tso <kyletso@google.com>
Link: https://lore.kernel.org/r/20210114145053.1952756-3-kyletso@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kyle Tso
2021-01-14 22:50:52 +08:00
committed by Greg Kroah-Hartman
parent 0908c5aca3
commit 8dea75e113
2 changed files with 246 additions and 90 deletions
Download Patch File Download Diff File Expand all files Collapse all files

335
drivers/usb/typec/tcpm/tcpm.c
View File

File diff suppressed because it is too large Load Diff

1
include/linux/usb/pd.h
View File

@@ -480,6 +480,7 @@ static inline unsigned int rdo_max_power(u32 rdo)
#define PD_T_SWAP_SRC_START 20 /* Minimum of 20ms */
#define PD_T_BIST_CONT_MODE 50 /* 30 - 60 ms */
#define PD_T_SINK_TX 16 /* 16 - 20 ms */
#define PD_T_CHUNK_NOT_SUPP 42 /* 40 - 50 ms */
#define PD_T_DRP_TRY 100 /* 75 - 150 ms */
#define PD_T_DRP_TRYWAIT 600 /* 400 - 800 ms */