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scsi: ufs: mediatek: Implement get_hba_nortt callback for RTT capability

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Implement the get_hba_nortt callback to handle platform-specific RTT
capability differences:

 - For legacy platforms and IP versions before MT6995 B0, the RTT
   capability from host controller register is problematic, so limit it to
   2 (MTK_MAX_NUM_RTT_LEGACY).

 - For MT6995 B0 and later platforms, the issue is fixed and the value from
   host controller capability register can be used directly.

This replaces the previous max_num_rtt field in ufs_hba_variant_ops with
dynamic platform-specific logic.

Signed-off-by: Ed Tsai <ed.tsai@mediatek.com>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20260615055802.105479-3-ed.tsai@mediatek.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ed Tsai 2026-06-15 13:57:16 +08:00 committed by Martin K. Petersen
parent e7896d02cb
commit 75f529a7bc
2 changed files with 13 additions and 3 deletions
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12
drivers/ufs/host/ufs-mediatek.c
View File

@ -2183,6 +2183,16 @@ static int ufs_mtk_clk_scale_notify(struct ufs_hba *hba, bool scale_up,
return 0;
}
static int ufs_mtk_get_hba_nortt(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
if (host->legacy_ip_ver || host->ip_ver < IP_VER_MT6995_B0)
return MTK_MAX_NUM_RTT_LEGACY;
return FIELD_GET(MASK_NUMBER_OUTSTANDING_RTT, hba->capabilities) + 1;
}
static int ufs_mtk_get_hba_mac(struct ufs_hba *hba)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
@ -2322,7 +2332,6 @@ static void ufs_mtk_config_scsi_dev(struct scsi_device *sdev)
*/
static const struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
.name = "mediatek.ufshci",
.max_num_rtt = MTK_MAX_NUM_RTT,
.init = ufs_mtk_init,
.get_ufs_hci_version = ufs_mtk_get_ufs_hci_version,
.setup_clocks = ufs_mtk_setup_clocks,
@ -2339,6 +2348,7 @@ static const struct ufs_hba_variant_ops ufs_hba_mtk_vops = {
.event_notify = ufs_mtk_event_notify,
.config_scaling_param = ufs_mtk_config_scaling_param,
.clk_scale_notify = ufs_mtk_clk_scale_notify,
.get_hba_nortt = ufs_mtk_get_hba_nortt,
/* mcq vops */
.get_hba_mac = ufs_mtk_get_hba_mac,
.op_runtime_config = ufs_mtk_op_runtime_config,

4
drivers/ufs/host/ufs-mediatek.h
View File

@ -203,8 +203,8 @@ struct ufs_mtk_host {
/* MTK delay of autosuspend: 500 ms */
#define MTK_RPM_AUTOSUSPEND_DELAY_MS 500
/* MTK RTT support number */
#define MTK_MAX_NUM_RTT 2
/* MTK RTT support number for platforms before MT6995 B0 */
#define MTK_MAX_NUM_RTT_LEGACY 2
/* UFSHCI MTK ip version value */
enum {