Re: [PATCH] bus: mhi: pci_generic: Introduce Sierra EM919X support

[Thomas Perrot <thomas.perrot@bootlin.com>]

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Hi Mani,

On Mon, 2021-11-22 at 21:09 +0530, Manivannan Sadhasivam wrote:
> On Mon, Nov 22, 2021 at 12:11:35PM +0100, Thomas Perrot wrote:
> > Add support for EM919X modems, this modem series is based on SDX55
> > qcom chip.
> > 
> > Tested-by: Aleksander Morgado <aleksander@aleksander.es>
> > Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
> > ---
> >  drivers/bus/mhi/pci_generic.c | 43
> > +++++++++++++++++++++++++++++++++++
> >  1 file changed, 43 insertions(+)
> > 
> > diff --git a/drivers/bus/mhi/pci_generic.c
> > b/drivers/bus/mhi/pci_generic.c
> > index 59a4896a8030..076a951fd587 100644
> > --- a/drivers/bus/mhi/pci_generic.c
> > +++ b/drivers/bus/mhi/pci_generic.c
> > @@ -403,7 +403,50 @@ static const struct mhi_pci_dev_info
> > mhi_mv31_info = {
> >         .dma_data_width = 32,
> >  };
> >  
> > +static const struct mhi_channel_config
> > mhi_sierra_em919x_channels[] = {
> > +       MHI_CHANNEL_CONFIG_UL_SBL(2, "SAHARA", 32, 0),
> > +       MHI_CHANNEL_CONFIG_DL_SBL(3, "SAHARA", 256, 0),
> > +       MHI_CHANNEL_CONFIG_UL(4, "DIAG", 32, 0),
> > +       MHI_CHANNEL_CONFIG_DL(5, "DIAG", 32, 0),
> 
> DIAG generally uses a dedicated event ring.
> 
> > +       MHI_CHANNEL_CONFIG_UL(12, "MBIM", 128, 0),
> > +       MHI_CHANNEL_CONFIG_DL(13, "MBIM", 128, 0),
> > +       MHI_CHANNEL_CONFIG_UL(14, "QMI", 32, 0),
> > +       MHI_CHANNEL_CONFIG_DL(15, "QMI", 32, 0),
> > +       MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
> > +       MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
> > +       MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0", 512, 1),
> > +       MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0", 512, 2),
> > +};
> > +
> > +static struct mhi_event_config modem_sierra_em919x_mhi_events[] =
> > {
> > +       /* first ring is control+data and DIAG ring */
> > +       MHI_EVENT_CONFIG_CTRL(0, 2048),
> 
> I think you can just split control+data and diag events as like other
> modems.
> If there is a requirement, please mention in commit description.
> 

Thank you, I will submit a v2 that notify, in commit description, that
is a requirement.

Best regards,
Thomas

> Rest LGTM.
> 
> Thanks,
> Mani

-- 
Thomas Perrot, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com


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