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From: Richard Zhu <hongxing.zhu@nxp.com>
To: l.stach@pengutronix.de, bhelgaas@google.com,
	lorenzo.pieralisi@arm.com, festevam@gmail.com
Cc: hongxing.zhu@nxp.com, linux-pci@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel@pengutronix.de,
	linux-imx@nxp.com
Subject: [RFC 2/2] PCI: imx6: Support more than Gen2 speed link mode
Date: Wed, 18 May 2022 17:35:28 +0800	[thread overview]
Message-ID: <1652866528-13220-2-git-send-email-hongxing.zhu@nxp.com> (raw)
In-Reply-To: <1652866528-13220-1-git-send-email-hongxing.zhu@nxp.com>

Support more than Gen2 speed link mode, since i.MX8MP PCIe supports up
to Gen3 link speed.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 30641d2dda14..37012f9a33a0 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -809,8 +809,8 @@ static int imx6_pcie_start_link(struct dw_pcie *pci)
 
 	dw_pcie_wait_for_link(pci);
 
-	if (pci->link_gen == 2) {
-		/* Allow Gen2 mode after the link is up. */
+	if (pci->link_gen > 1) {
+		/* Allow faster modes after the link is up. */
 		dw_pcie_dbi_ro_wr_en(pci);
 		tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP);
 		tmp &= ~PCI_EXP_LNKCAP_SLS;
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Richard Zhu <hongxing.zhu@nxp.com>
To: l.stach@pengutronix.de, bhelgaas@google.com,
	lorenzo.pieralisi@arm.com, festevam@gmail.com
Cc: hongxing.zhu@nxp.com, linux-pci@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel@pengutronix.de,
	linux-imx@nxp.com
Subject: [RFC 2/2] PCI: imx6: Support more than Gen2 speed link mode
Date: Wed, 18 May 2022 17:35:28 +0800	[thread overview]
Message-ID: <1652866528-13220-2-git-send-email-hongxing.zhu@nxp.com> (raw)
In-Reply-To: <1652866528-13220-1-git-send-email-hongxing.zhu@nxp.com>

Support more than Gen2 speed link mode, since i.MX8MP PCIe supports up
to Gen3 link speed.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
---
 drivers/pci/controller/dwc/pci-imx6.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 30641d2dda14..37012f9a33a0 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -809,8 +809,8 @@ static int imx6_pcie_start_link(struct dw_pcie *pci)
 
 	dw_pcie_wait_for_link(pci);
 
-	if (pci->link_gen == 2) {
-		/* Allow Gen2 mode after the link is up. */
+	if (pci->link_gen > 1) {
+		/* Allow faster modes after the link is up. */
 		dw_pcie_dbi_ro_wr_en(pci);
 		tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP);
 		tmp &= ~PCI_EXP_LNKCAP_SLS;
-- 
2.25.1


_______________________________________________
linux-arm-kernel mailing list
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2022-05-18  9:48 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-18  9:35 [RFC 1/2] PCI: imx6: Make sure the DBI register can be changed Richard Zhu
2022-05-18  9:35 ` Richard Zhu
2022-05-18  9:35 ` Richard Zhu [this message]
2022-05-18  9:35   ` [RFC 2/2] PCI: imx6: Support more than Gen2 speed link mode Richard Zhu
2022-07-20  0:59   ` Tim Harvey
2022-07-20  0:59     ` Tim Harvey
2022-07-20  1:43     ` Hongxing Zhu
2022-07-20  1:43       ` Hongxing Zhu
2022-07-20  3:07       ` Hongxing Zhu
2022-07-20  3:07         ` Hongxing Zhu
2022-07-11 22:17 ` [RFC 1/2] PCI: imx6: Make sure the DBI register can be changed Bjorn Helgaas
2022-07-11 22:17   ` Bjorn Helgaas
2022-07-12  1:30   ` Hongxing Zhu
2022-07-12  1:30     ` Hongxing Zhu
2022-07-12 19:26     ` Bjorn Helgaas
2022-07-12 19:26       ` Bjorn Helgaas

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