Hi Vinod,

-----Original Message-----
From: Vinod Koul <vkoul@kernel.org>
Sent: Thursday, November 25, 2021 10:41 AM
To: Swapnil Kashinath Jakhade <redacted>
Cc: kishon@ti.com; robh+dt@kernel.org; p.zabel@pengutronix.de; linux-
phy@lists.infradead.org; linux-kernel@vger.kernel.org;
devicetree@vger.kernel.org; Milind Parab [off-list ref]; a-
govindraju@ti.com
Subject: Re: [PATCH v3 13/15] phy: cadence: Sierra: Add PCIe + QSGMII PHY
multilink configuration

EXTERNAL MAIL


On 24-11-21, 07:33, Swapnil Kashinath Jakhade wrote:

quoted

quoted

so this is pcie->qsgmii ->ssc/external/internal ... ok

quoted

+				[NO_SSC] =

&pcie_100_no_ssc_plllc_cmn_vals,

quoted

+				[EXTERNAL_SSC] =

&pcie_100_ext_ssc_plllc_cmn_vals,

quoted

+				[INTERNAL_SSC] =

&pcie_100_int_ssc_plllc_cmn_vals,

quoted

+			},
 		},
 		[TYPE_USB] = {
 			[TYPE_NONE] = {
 				[EXTERNAL_SSC] =

&usb_100_ext_ssc_cmn_vals,

quoted

 			},
 		},
+		[TYPE_QSGMII] = {
+			[TYPE_PCIE] = {

now it is reverse! qsgmii -> pcie -> ... why?

what is meant by pcie->qsgmii and qsgmii-> pcie?

Multi-protocol configuration is done in 2 phases, each for one protocol.
e.g. for PCIe + QSGMII case,
[TYPE_PCIE][TYPE_QSGMII] will configure common and lane registers for
PCIe and [TYPE_QSGMII][TYPE_PCIE] will configure common and lane

registers for QSGMII.

Then it should be always common + protocol or protocol + common, not
both please! Pls make an order and stick to it everywhere... If that is not
possible, I would like to understand why

Could you please elaborate what do you mean by
" common + protocol or protocol + common, not both please!"?
The order is same everywhere which is common + lane configuration for protocol 1
and then for protocol 2. For multiprotocol case, PHY configuration is based on which
protocols are operating simultaneously. So e.g.
[TYPE_QSGMII][TYPE_PCIE] -> QSGMII configuration when other protocol is PCIe
Which might be different than
[TYPE_QSGMII][TYPE_*] -> QSGMII configuration with other protocol.

Thanks & regards,
Swapnil

--
~Vinod