usb: xhci-mtk: support quirk to disable usb2 lpm

[ Upstream commit bee1f89aad2a51cd3339571bc8eadbb0dc88a683 ]

The xHCI driver support usb2 HW LPM by default, here add support
XHCI_HW_LPM_DISABLE quirk, then we can disable usb2 lpm when
need it.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1617181553-3503-4-git-send-email-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 2f27dc0..1c33157 100644 (file)
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -397,6 +397,8 @@ static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci)
        xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
        if (mtk->lpm_support)
                xhci->quirks |= XHCI_LPM_SUPPORT;
+       if (mtk->u2_lpm_disable)
+               xhci->quirks |= XHCI_HW_LPM_DISABLE;
 
        /*
         * MTK xHCI 0.96: PSA is 1 by default even if doesn't support stream,
@@ -469,6 +471,7 @@ static int xhci_mtk_probe(struct platform_device *pdev)
                return ret;
 
        mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable");
+       mtk->u2_lpm_disable = of_property_read_bool(node, "usb2-lpm-disable");
        /* optional property, ignore the error if it does not exist */
        of_property_read_u32(node, "mediatek,u3p-dis-msk",
                             &mtk->u3p_dis_msk);

diff --git a/drivers/usb/host/xhci-mtk.h b/drivers/usb/host/xhci-mtk.h
index cbb09df..0801090 100644 (file)
--- a/drivers/usb/host/xhci-mtk.h
+++ b/drivers/usb/host/xhci-mtk.h
@@ -150,6 +150,7 @@ struct xhci_hcd_mtk {
        struct phy **phys;
        int num_phys;
        bool lpm_support;
+       bool u2_lpm_disable;
        /* usb remote wakeup */
        bool uwk_en;
        struct regmap *uwk;