From ecb8d6da1356abc3168e530fc328b3d461107d0f Mon Sep 17 00:00:00 2001 From: Can Guo Date: Tue, 16 Jun 2026 04:33:48 -0700 Subject: scsi: ufs: core: Add support for static TX Equalization settings Parse board-specific static TX Equalization settings from Device Tree for each HS gear and store them in hba->tx_eq_params. Parse txeq-preshoot-g[1-6] and txeq-deemphasis-g[1-6] as per-lane tuples: , []. For HS-G6, parse optional tx-precode-enable-g6 using the same per-lane Host/Device tuple format. If provided, it must contain values for all active lanes, and each value must be 0 or 1. Introduce from_dt in struct ufshcd_tx_eq_params to track whether TX EQ values came from static Device Tree data. When adaptive TX Equalization is used, these static settings are not final: - If valid settings are retrieved from qTxEQGnSettings/wTxEQGnSettingsExt, those retrieved settings override static Device Tree settings. - If retrieval is not available/valid, TX EQTR runs and trained settings override static Device Tree settings. So static Device Tree settings are a fallback for cases where adaptive TX Equalization is not enabled or not used. Adaptive TX Equalization remains the primary path when enabled. No behavior changes for platforms that do not provide these properties. Reviewed-by: Manivannan Sadhasivam Reviewed-by: Peter Wang Signed-off-by: Can Guo Reviewed-by: Bart Van Assche Link: https://patch.msgid.link/20260616113348.1168248-3-can.guo@oss.qualcomm.com Signed-off-by: Martin K. Petersen --- include/ufs/ufshcd.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/ufs') diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 248d0a5bef40..f96a97fbd314 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -359,6 +359,7 @@ struct ufshcd_tx_eqtr_record { * @is_valid: True if parameter contains valid TX Equalization settings * @is_applied: True if settings have been applied to UniPro of both sides * @is_trained: True if parameters obtained from TX EQTR procedure + * @from_dt: True if settings are from Device Tree */ struct ufshcd_tx_eq_params { struct ufshcd_tx_eq_settings host[UFS_MAX_LANES]; @@ -367,6 +368,7 @@ struct ufshcd_tx_eq_params { bool is_valid; bool is_applied; bool is_trained; + bool from_dt; }; /** -- cgit v1.2.3