2025-02-02 00:10:15 -05:00
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From 5cabe629f702321febec3d1b13126ce6d205099b Mon Sep 17 00:00:00 2001
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2025-01-04 18:13:32 -05:00
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From: Yu Ning <ningyu@eswincomputing.com>
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Date: Thu, 7 Nov 2024 13:37:34 +0000
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2025-01-07 10:49:22 -05:00
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Subject: [PATCH 110/128] drivers: pcie: eswin: Disable MSI-X
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2025-01-04 18:13:32 -05:00
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Disable MSI-X capability of PCI as it consumes a large amount of
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CPU resources, causing delays in handling the VO’s vblank interrupt
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This patch fixes vblank timeout warning dump on bootup
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Signed-off-by: Yu Ning <ningyu@eswincomputing.com>
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---
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drivers/pci/controller/dwc/pcie-eswin.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/drivers/pci/controller/dwc/pcie-eswin.c b/drivers/pci/controller/dwc/pcie-eswin.c
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index 6d142f2287d3..0fc6b8a21d03 100644
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--- a/drivers/pci/controller/dwc/pcie-eswin.c
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+++ b/drivers/pci/controller/dwc/pcie-eswin.c
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@@ -319,6 +319,11 @@ static int eswin_pcie_host_init(struct dw_pcie_rp *pp)
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/* config support 32 msi vectors */
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dw_pcie_writel_dbi(pci, 0x50, 0x018a7005);
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+ /* disable msix cap */
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+ val = dw_pcie_readl_dbi(pci, 0x70);
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+ val &= 0xffff00ff;
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+ dw_pcie_writel_dbi(pci, 0x70, val);
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+
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return 0;
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}
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--
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2.47.0
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