From cb949ce504e829193234e26cb3042bb448465d52 Mon Sep 17 00:00:00 2001 From: Karol Wachowski Date: Mon, 3 Apr 2023 14:15:45 +0200 Subject: accel/ivpu: Remove D3hot delay for Meteorlake VPU on MTL has hardware optimizations and does not require 10ms D0 - D3hot transition delay imposed by PCI specification (PCIe r6.0, sec 5.9.) . The delay removal is traditionally done by adding PCI ID to quirk_remove_d3hot_delay() in drivers/pci/quirks.c . But since we do not need that optimization before driver probe and we can better specify in the ivpu driver on what (future) hardware use the optimization, we do not use quirk_remove_d3hot_delay() for that. Signed-off-by: Karol Wachowski Signed-off-by: Stanislaw Gruszka Reviewed-by: Jeffrey Hugo Signed-off-by: Jacek Lawrynowicz Link: https://patchwork.freedesktop.org/patch/msgid/20230403121545.2995279-1-stanislaw.gruszka@linux.intel.com --- drivers/accel/ivpu/ivpu_drv.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/accel') diff --git a/drivers/accel/ivpu/ivpu_drv.c b/drivers/accel/ivpu/ivpu_drv.c index 231f29bb5025..eb6405f9bf6b 100644 --- a/drivers/accel/ivpu/ivpu_drv.c +++ b/drivers/accel/ivpu/ivpu_drv.c @@ -433,6 +433,10 @@ static int ivpu_pci_init(struct ivpu_device *vdev) /* Clear any pending errors */ pcie_capability_clear_word(pdev, PCI_EXP_DEVSTA, 0x3f); + /* VPU MTL does not require PCI spec 10m D3hot delay */ + if (ivpu_is_mtl(vdev)) + pdev->d3hot_delay = 0; + ret = pcim_enable_device(pdev); if (ret) { ivpu_err(vdev, "Failed to enable PCI device: %d\n", ret); -- cgit v1.2.3