diff options
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/ramips/patches-5.10/108-PCI-mt7621-Delay-phy-ports-initialization.patch | 52 | ||||
| -rw-r--r-- | target/linux/ramips/patches-5.15/108-PCI-mt7621-Delay-phy-ports-initialization.patch | 52 |
2 files changed, 104 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-5.10/108-PCI-mt7621-Delay-phy-ports-initialization.patch b/target/linux/ramips/patches-5.10/108-PCI-mt7621-Delay-phy-ports-initialization.patch new file mode 100644 index 0000000000..ef03b00444 --- /dev/null +++ b/target/linux/ramips/patches-5.10/108-PCI-mt7621-Delay-phy-ports-initialization.patch @@ -0,0 +1,52 @@ +From 0cb2a8f3456ff1cc51d571e287a48e8fddc98ec2 Mon Sep 17 00:00:00 2001 +From: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Date: Sat, 31 Dec 2022 08:40:41 +0100 +Subject: PCI: mt7621: Delay phy ports initialization + +Some devices like ZBT WE1326 and ZBT WF3526-P and some Netgear models need +to delay phy port initialization after calling the mt7621_pcie_init_port() +driver function to get into reliable boots for both warm and hard resets. + +The delay required to detect the ports seems to be in the range [75-100] +milliseconds. + +If the ports are not detected the controller is not functional. + +There is no datasheet or something similar to really understand why this +extra delay is needed only for these devices and it is not for most of +the boards that are built on mt7621 SoC. + +This issue has been reported by openWRT community and the complete +discussion is in [0]. The 100 milliseconds delay has been tested in all +devices to validate it. + +Add the extra 100 milliseconds delay to fix the issue. + +[0]: https://github.com/openwrt/openwrt/pull/11220 + +Link: https://lore.kernel.org/r/20221231074041.264738-1-sergio.paracuellos@gmail.com +Fixes: 2bdd5238e756 ("PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver") +Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> +--- + drivers/staging/mt7621-pci/pci-mt7621.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/drivers/staging/mt7621-pci/pci-mt7621.c ++++ b/drivers/staging/mt7621-pci/pci-mt7621.c +@@ -86,6 +86,7 @@ + #define MEMORY_BASE 0x0 + #define PERST_MODE_MASK GENMASK(11, 10) + #define PERST_MODE_GPIO BIT(10) ++#define INIT_PORTS_DELAY_MS 100 + #define PERST_DELAY_MS 100 + + /** +@@ -521,6 +522,7 @@ static void mt7621_pcie_init_ports(struc + } + } + ++ msleep(INIT_PORTS_DELAY_MS); + mt7621_pcie_reset_ep_deassert(pcie); + + tmp = NULL; diff --git a/target/linux/ramips/patches-5.15/108-PCI-mt7621-Delay-phy-ports-initialization.patch b/target/linux/ramips/patches-5.15/108-PCI-mt7621-Delay-phy-ports-initialization.patch new file mode 100644 index 0000000000..de1d4cfc12 --- /dev/null +++ b/target/linux/ramips/patches-5.15/108-PCI-mt7621-Delay-phy-ports-initialization.patch @@ -0,0 +1,52 @@ +From 0cb2a8f3456ff1cc51d571e287a48e8fddc98ec2 Mon Sep 17 00:00:00 2001 +From: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Date: Sat, 31 Dec 2022 08:40:41 +0100 +Subject: PCI: mt7621: Delay phy ports initialization + +Some devices like ZBT WE1326 and ZBT WF3526-P and some Netgear models need +to delay phy port initialization after calling the mt7621_pcie_init_port() +driver function to get into reliable boots for both warm and hard resets. + +The delay required to detect the ports seems to be in the range [75-100] +milliseconds. + +If the ports are not detected the controller is not functional. + +There is no datasheet or something similar to really understand why this +extra delay is needed only for these devices and it is not for most of +the boards that are built on mt7621 SoC. + +This issue has been reported by openWRT community and the complete +discussion is in [0]. The 100 milliseconds delay has been tested in all +devices to validate it. + +Add the extra 100 milliseconds delay to fix the issue. + +[0]: https://github.com/openwrt/openwrt/pull/11220 + +Link: https://lore.kernel.org/r/20221231074041.264738-1-sergio.paracuellos@gmail.com +Fixes: 2bdd5238e756 ("PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver") +Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> +Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> +--- + drivers/pci/controller/pcie-mt7621.c | 2 ++ + 1 file changed, 2 insertions(+) + +--- a/drivers/pci/controller/pcie-mt7621.c ++++ b/drivers/pci/controller/pcie-mt7621.c +@@ -58,6 +58,7 @@ + #define PCIE_PORT_LINKUP BIT(0) + #define PCIE_PORT_CNT 3 + ++#define INIT_PORTS_DELAY_MS 100 + #define PERST_DELAY_MS 100 + + /** +@@ -374,6 +375,7 @@ static int mt7621_pcie_init_ports(struct + } + } + ++ msleep(INIT_PORTS_DELAY_MS); + mt7621_pcie_reset_ep_deassert(pcie); + + tmp = NULL; |