On Jun 09 2016 or thereabouts, Benjamin Tissoires wrote: > The i801 chip can handle the Host Notify feature since ICH 3 as mentioned > in http://www.intel.com/content/dam/doc/datasheet/82801ca-io-controller-hub-3-datasheet.pdf > > Enable the functionality unconditionally and propagate the alert > on each notification. > > With a T440s and a Synaptics touchpad that implements Host Notify, the > payload data is always 0x0000, so I am not sure if the device actually > sends the payload or if there is a problem regarding the implementation. > > Tested-by: Andrew Duggan <aduggan@xxxxxxxxxxxxx> > Acked-by: Wolfram Sang <wsa@xxxxxxxxxxxxx> > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx> > --- > changes in v2: > - removed the description of the Slave functionality support in the chip table > (the table shows what is supported, not what the hardware is capable of) > - use i2c-smbus to forward the notification > - remove the fifo, and directly retrieve the address and payload in the worker > - do not check for Host Notification is the feature is not enabled > - use inw_p() to read the payload instead of 2 inb_p() calls > - add /* fall-through */ comment > - unconditionally enable Host Notify if the hardware supports it (can be > disabled by the user) > > no changes in v3 > > changes in v4: > - make use of the new API -> no more worker spawning here > - solved a race between the access of the Host Notify registers and the actual > I2C transfers. > > changes in v5: > - added SKL Host Notify support > > changes in v6: > - select I2C_SMBUS in Kconfig to prevent an undefined reference when I2C_I801 > is set to 'Y' while I2C_SMBUS is set to 'M' > > no changes in v7 > > changes in v8: > - reapplied after http://patchwork.ozlabs.org/patch/632768/ and merged the > conflict (minor conflict in the struct i801_priv). > - removed the .resume hook as upstream changed suspend/resume hooks and there > is no need in the end to re-enable host notify on resume (tested on Lenovo > t440 and t450). Actually, this hook seemed to be required on the Lenovo T440 (Haswell) but not on the T450 (Broadwell) laptop I have now here. Wolfram, I can resend the whole series or a follow-up patch to re-enable after resume Host Notify. How do you prefer I deal with that? Cheers, Benjamin -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
