Looks good to me . Reviewed-by: Shaoyun liu <shaoyun....@amd.com><mailto:shaoyun....@amd.com>
On 2019-10-03 1:33 p.m., Tom St Denis wrote: Tested-by: Tom St Denis <tom.stde...@amd.com><mailto:tom.stde...@amd.com> Cheers, Tom On Thu, Oct 3, 2019 at 1:30 PM Alex Deucher <alexdeuc...@gmail.com><mailto:alexdeuc...@gmail.com> wrote: Check the number of supported vectors and fall back to MSI if we return or error or 0 MSI-X vectors. v2: only allocate one vector. We can't currently use more than one anyway. v3: install the irq on vector 0. Signed-off-by: Alex Deucher <alexander.deuc...@amd.com><mailto:alexander.deuc...@amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c index 50771b2757dc..6f3b03f6224f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c @@ -245,11 +245,19 @@ int amdgpu_irq_init(struct amdgpu_device *adev) adev->irq.msi_enabled = false; if (amdgpu_msi_ok(adev)) { - int nvec = pci_alloc_irq_vectors(adev->pdev, 1, pci_msix_vec_count(adev->pdev), - PCI_IRQ_MSI | PCI_IRQ_MSIX); + int nvec = pci_msix_vec_count(adev->pdev); + unsigned int flags; + + if (nvec <= 0) { + flags = PCI_IRQ_MSI; + } else { + flags = PCI_IRQ_MSI | PCI_IRQ_MSIX; + } + /* we only need one vector */ + nvec = pci_alloc_irq_vectors(adev->pdev, 1, 1, flags); if (nvec > 0) { adev->irq.msi_enabled = true; - dev_dbg(adev->dev, "amdgpu: using MSI.\n"); + dev_dbg(adev->dev, "amdgpu: using MSI/MSI-X.\n"); } } @@ -272,7 +280,8 @@ int amdgpu_irq_init(struct amdgpu_device *adev) INIT_WORK(&adev->irq.ih2_work, amdgpu_irq_handle_ih2); adev->irq.installed = true; - r = drm_irq_install(adev->ddev, adev->ddev->pdev->irq); + /* Use vector 0 for MSI-X */ + r = drm_irq_install(adev->ddev, pci_irq_vector(adev->pdev, 0)); if (r) { adev->irq.installed = false; if (!amdgpu_device_has_dc_support(adev)) -- 2.20.1 _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org<mailto:amd-gfx@lists.freedesktop.org> https://lists.freedesktop.org/mailman/listinfo/amd-gfx _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org<mailto:amd-gfx@lists.freedesktop.org> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
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