[0/3] Separate out earlycon

Patch 3/3 depends on patch 1/3, Greg would it be possible to
ack patch 3/3. So it could land via QCOM tree.

Akash Asthana (3):
  soc: qcom-geni-se: Cleanup the code to remove proxy votes
  arm64: dts: qcom: sc7180: Remove QUP-CORE ICC path
  Serial: Separate out earlycon support

 arch/arm64/boot/dts/qcom/sc7180.dtsi    |   4 -
 drivers/soc/qcom/qcom-geni-se.c         |  74 ----
 drivers/tty/serial/Kconfig              |   9 +
 drivers/tty/serial/Makefile             |   1 +
 drivers/tty/serial/qcom_geni_earlycon.c | 649 ++++++++++++++++++++++++++++++++
 drivers/tty/serial/qcom_geni_serial.c   | 104 -----
 include/linux/qcom-geni-se.h            |   2 -
 7 files changed, 659 insertions(+), 184 deletions(-)
 create mode 100644 drivers/tty/serial/qcom_geni_earlycon.c

On Mon, Dec 07, 2020 at 02:17:27PM +0530, Akash Asthana wrote:
> Separate out earlycon support from serial driver and remove it's
> dependency on QUP wrapper driver.
> 
> This enable us to manage earlycon independently and we can re-use the
> same earlycon driver for android project which currently uses
> downstream version of QUP drivers.
> 
> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
> ---
>  drivers/tty/serial/Kconfig              |   9 +
>  drivers/tty/serial/Makefile             |   1 +
>  drivers/tty/serial/qcom_geni_earlycon.c | 649 ++++++++++++++++++++++++++++++++
>  drivers/tty/serial/qcom_geni_serial.c   |  97 -----
>  4 files changed, 659 insertions(+), 97 deletions(-)
>  create mode 100644 drivers/tty/serial/qcom_geni_earlycon.c

Nit, your subject line shoudl say somewhere that this is the qcom
earlycon driver/support, not "earlycon in general".

thanks,

greg k-h

Hi Greg,

On 12/7/2020 3:13 PM, Greg KH wrote:
> On Mon, Dec 07, 2020 at 02:17:27PM +0530, Akash Asthana wrote:
>> Separate out earlycon support from serial driver and remove it's
>> dependency on QUP wrapper driver.
>>
>> This enable us to manage earlycon independently and we can re-use the
>> same earlycon driver for android project which currently uses
>> downstream version of QUP drivers.
>>
>> Signed-off-by: Akash Asthana <akashast@codeaurora.org>
>> ---
>>   drivers/tty/serial/Kconfig              |   9 +
>>   drivers/tty/serial/Makefile             |   1 +
>>   drivers/tty/serial/qcom_geni_earlycon.c | 649 ++++++++++++++++++++++++++++++++
>>   drivers/tty/serial/qcom_geni_serial.c   |  97 -----
>>   4 files changed, 659 insertions(+), 97 deletions(-)
>>   create mode 100644 drivers/tty/serial/qcom_geni_earlycon.c
> Nit, your subject line shoudl say somewhere that this is the qcom
> earlycon driver/support, not "earlycon in general".
Thanks for feedback, I will take care of it in next post.
>
> thanks,
>
> greg k-h

On Mon, Dec 07, 2020 at 05:52:32PM +0530, Akash Asthana wrote:
> Hi Greg,
> 
> On 12/7/2020 2:41 PM, Greg KH wrote:
> > On Mon, Dec 07, 2020 at 02:17:27PM +0530, Akash Asthana wrote:
> > > Separate out earlycon support from serial driver and remove it's
> > > dependency on QUP wrapper driver.
> > > 
> > > This enable us to manage earlycon independently and we can re-use the
> > > same earlycon driver for android project which currently uses
> > > downstream version of QUP drivers.
> > What do you mean by "downstream" here?
> > 
> > > Signed-off-by: Akash Asthana <akashast@codeaurora.org>
> > > ---
> > >   drivers/tty/serial/Kconfig              |   9 +
> > >   drivers/tty/serial/Makefile             |   1 +
> > >   drivers/tty/serial/qcom_geni_earlycon.c | 649 ++++++++++++++++++++++++++++++++
> > >   drivers/tty/serial/qcom_geni_serial.c   |  97 -----
> > So you are replacing 97 lines of code with 649 lines?  How is this
> > benefiting anyone?
> > 
> > confused,
> 
> We have 2 versions of QUP driver, upstream version(Present in linus tree,
> mostly used for chromium project) and downstream version(belong to vendor
> part of code in GKI design, used for all the other project).

Why do you have 2 different versions?  Why not merge them both into the
kernel tree?  That seems like madness to try to support 2.  And why
would we care about any out-of-tree code?  This is increasing our
complexity for code that isn't even being merged here, not anything you
would do if you were the maintainer of it, right?

> There is need to enable geni earlycon in Google provided boot image for GKI
> to facilitate the debug until real console(belong to vendor code) is up.

Then submit the code for that here please.

> Currently it won't be possible because geni earlycon cannot be enabled
> independently, it depends on upstream QUP wrapper driver
> (soc/qcom/qcom-geni-se.c) and upstream serial
> driver(serial/qcom_geni_serial.c).
> 
> With this patch I am trying to break any dependency btw earlycon hook and
> QUP kernel drivers, so it can be managed independently.

Please submit the code that depends on this change, and we will be glad
to review it.

thanks,

greg k-h