Re: [PATCH 4.4.y] drm: adv7511: Re-write the i2c address before EDID probing

2017-09-09 Thread Nhan Ngoc. Nguyen
This patch is ported from linux stable 4.9, commit 3587c856675c45809010c2cee5b21096f6e8e938. So I think I don't need to port on version 4.9. On 9/8/2017 2:21 PM, Greg KH wrote: On Fri, Sep 08, 2017 at 09:46:02AM +0700, Nhan Nguyen wrote: commit 3587c856675c45809010c2cee5b21096f6e8e938 upstream

Re: [PATCH 4.4.y] drm: adv7511: Re-write the i2c address before EDID probing

2017-09-08 Thread Greg KH
On Fri, Sep 08, 2017 at 06:22:02PM +0700, Nhan Ngoc. Nguyen wrote: > This patch is ported from linux stable 4.9, commit > 3587c856675c45809010c2cee5b21096f6e8e938. No, commit 3587c856675c45809010c2cee5b21096f6e8e938 showed up in 4.11-rc1: $ git describe --contains 3587c856675c45809010c2ce

[PATCH 4.4.y] drm: adv7511: Re-write the i2c address before EDID probing

2017-09-08 Thread Nhan Nguyen
commit 3587c856675c45809010c2cee5b21096f6e8e938 upstream. I've found that by just turning the chip on and off via the POWER_DOWN register, I end up getting i2c_transfer errors on HiKey. Investigating further, it turns out that some of the register state in hardware is getting lost, as the device

Re: [PATCH 4.4.y] drm: adv7511: Re-write the i2c address before EDID probing

2017-09-08 Thread Greg KH
On Fri, Sep 08, 2017 at 09:46:02AM +0700, Nhan Nguyen wrote: > commit 3587c856675c45809010c2cee5b21096f6e8e938 upstream. > > I've found that by just turning the chip on and off via the > POWER_DOWN register, I end up getting i2c_transfer errors on > HiKey. > > Investigating further, it turns out