diff options
Diffstat (limited to 'nixos/modules/kernel-patches/0095-phy-marvell-phy-mvebu-a3700-comphy-Change-2500base-x.patch')
| -rw-r--r-- | nixos/modules/kernel-patches/0095-phy-marvell-phy-mvebu-a3700-comphy-Change-2500base-x.patch | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/nixos/modules/kernel-patches/0095-phy-marvell-phy-mvebu-a3700-comphy-Change-2500base-x.patch b/nixos/modules/kernel-patches/0095-phy-marvell-phy-mvebu-a3700-comphy-Change-2500base-x.patch deleted file mode 100644 index 918e5a1..0000000 --- a/nixos/modules/kernel-patches/0095-phy-marvell-phy-mvebu-a3700-comphy-Change-2500base-x.patch +++ /dev/null @@ -1,63 +0,0 @@ -From e5aa46ceca003444bd2e7a5f4fd43d5e61499515 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Marek=20Beh=C3=BAn?= <kabel@kernel.org> -Date: Wed, 17 Aug 2022 14:35:59 +0200 -Subject: [PATCH 95/96] phy: marvell: phy-mvebu-a3700-comphy: Change 2500base-x - transmit amplitude -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Change transmit amplitude to 1025 mV for 2500base-x mode. - -This fixes issue wherein if the 8b/10b encoded packet contains a long -enough alternating sequence of bits (010101... or 101010...), which -happens if the packet contains a sequence of 'J' or '\xb5' bytes, the -packet may be lost due to FCS error. The probability of loss grows with -the number of 'J's with default transmit amplitude setting - with 114 -'J's the probability is about 50%, with 125 'J's almost 100% of packets -are lost. - -Signed-off-by: Marek Behún <kabel@kernel.org> ---- - drivers/phy/marvell/phy-mvebu-a3700-comphy.c | 18 ++++++++++++++++++ - 1 file changed, 18 insertions(+) - -diff --git a/drivers/phy/marvell/phy-mvebu-a3700-comphy.c b/drivers/phy/marvell/phy-mvebu-a3700-comphy.c -index a4d7d9bd100d..4a18f9ca6d25 100644 ---- a/drivers/phy/marvell/phy-mvebu-a3700-comphy.c -+++ b/drivers/phy/marvell/phy-mvebu-a3700-comphy.c -@@ -68,6 +68,12 @@ - #define SPEED_PLL_MASK GENMASK(7, 2) - #define SPEED_PLL_VALUE_16 FIELD_PREP(SPEED_PLL_MASK, 0x10) - -+#define COMPHY_GEN3_SET0 0x0d -+#define Gx_TX_AMP_MASK GENMASK(5, 1) -+#define Gx_TX_AMP_VALUE(x) FIELD_PREP(Gx_TX_AMP_MASK, x) -+#define Gx_TX_AMP_ADJ BIT(6) -+#define Gx_TX_AMP_1025MV (Gx_TX_AMP_VALUE(0x12) | Gx_TX_AMP_ADJ) -+ - #define COMPHY_DIG_LOOPBACK_EN 0x23 - #define SEL_DATA_WIDTH_MASK GENMASK(11, 10) - #define DATA_WIDTH_10BIT FIELD_PREP(SEL_DATA_WIDTH_MASK, 0x0) -@@ -746,6 +752,18 @@ mvebu_a3700_comphy_ethernet_power_on(struct mvebu_a3700_comphy_lane *lane) - comphy_gbe_phy_init(lane, - lane->submode != PHY_INTERFACE_MODE_2500BASEX); - -+ /* -+ * Fix issue wherein a packet may be lost if it contains a long enough -+ * sequence of 'J' or '\xb5' bytes. -+ * This only happens with 2500base-x mode. Fix this by changing transmit -+ * amplitude to 1025 mV. -+ */ -+ if (lane->submode == PHY_INTERFACE_MODE_2500BASEX) { -+ data = Gx_TX_AMP_1025MV; -+ mask = Gx_TX_AMP_MASK | Gx_TX_AMP_ADJ; -+ comphy_lane_reg_set(lane, COMPHY_GEN3_SET0, data, mask); -+ } -+ - /* - * 14. Check the PHY Polarity invert bit - */ --- -2.37.2 - |