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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Jul 2025 15:41:36.7735 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 818bf5e1-45b5-4c1c-0e3e-08ddc9363e6b X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000A672F.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4429 Content-Type: text/plain; charset="utf-8" The "exclude_qbv" bit in designcfg_debug1 register varies between MACB/GEM IP revisions, making direct register probing unreliable for feature detection. A capability-based approach provides consistent QBV support identification across the IP family Platform support: - Enable MACB_CAPS_QBV for Xilinx Versal platform configuration - Foundation for QBV feature detection in TAPRIO implementation Signed-off-by: Vineeth Karumanchi --- drivers/net/ethernet/cadence/macb.h | 1 + drivers/net/ethernet/cadence/macb_main.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cad= ence/macb.h index ef3995564c5c..4e8d5dcc814e 100644 --- a/drivers/net/ethernet/cadence/macb.h +++ b/drivers/net/ethernet/cadence/macb.h @@ -782,6 +782,7 @@ #define MACB_CAPS_MIIONRGMII 0x00000200 #define MACB_CAPS_NEED_TSUCLK 0x00000400 #define MACB_CAPS_QUEUE_DISABLE 0x00000800 +#define MACB_CAPS_QBV 0x00001000 #define MACB_CAPS_PCS 0x01000000 #define MACB_CAPS_HIGH_SPEED 0x02000000 #define MACB_CAPS_CLK_HW_CHG 0x04000000 diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/etherne= t/cadence/macb_main.c index cc33491930e3..98e56697661c 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -4601,6 +4601,10 @@ static int macb_init(struct platform_device *pdev) dev->hw_features |=3D NETIF_F_HW_CSUM | NETIF_F_RXCSUM; if (bp->caps & MACB_CAPS_SG_DISABLED) dev->hw_features &=3D ~NETIF_F_SG; + /* Enable HW_TC if hardware supports QBV */ + if (bp->caps & MACB_CAPS_QBV) + dev->hw_features |=3D NETIF_F_HW_TC; + dev->features =3D dev->hw_features; =20 /* Check RX Flow Filters support. @@ -5345,7 +5349,7 @@ static const struct macb_config sama7g5_emac_config = =3D { static const struct macb_config versal_config =3D { .caps =3D MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH | MACB_CAPS_NEED_TSUCLK= | - MACB_CAPS_QUEUE_DISABLE, + MACB_CAPS_QUEUE_DISABLE, MACB_CAPS_QBV, .dma_burst_length =3D 16, .clk_init =3D macb_clk_init, .init =3D init_reset_optional, --=20 2.34.1