AMD devices with the FCH SATA Controller 0x1022:0x7901 do not need the
default debounce delay of 200 ms.
07:00.2 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
So skip it, by mapping it to the board with no debounce delay.
Tested on the MSI MS-7A37/B350M MORTAR (MS-7A37).
To-do: Add test details and results.
Signed-off-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
---
I am travelling so could not test this exact patch just yet, but I ran
something similar for several weeks already. Itâ??d be great, if the
desktop and AMD folks could also give this a try.
drivers/ata/ahci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 0fc09b86a559..44b79fe43d13 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -456,7 +456,7 @@ static const struct pci_device_id ahci_pci_tbl[] = {
{ PCI_VDEVICE(AMD, 0x7800), board_ahci }, /* AMD Hudson-2 */
{ PCI_VDEVICE(AMD, 0x7801), board_ahci_no_debounce_delay }, /* AMD Hudson-2 (AHCI mode) */
{ PCI_VDEVICE(AMD, 0x7900), board_ahci }, /* AMD CZ */
- { PCI_VDEVICE(AMD, 0x7901), board_ahci_low_power }, /* AMD Green Sardine */
+ { PCI_VDEVICE(AMD, 0x7901), board_ahci_low_power_no_debounce_delay }, /* AMD Green Sardine */
/* AMD is using RAID class only for ahci controllers */
{ PCI_VENDOR_ID_AMD, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_CLASS_STORAGE_RAID << 8, 0xffffff, board_ahci },
--
2.30.2
