linux-kernel - Re: [PATCH] drm/radeon: drm/amdgpu: Disable [1002:6611] in radeon

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Date:   Thu, 30 Apr 2020 09:12:51 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Jian-Hong Pan <jian-hong@...lessm.com>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Zhou <David1.Zhou@....com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        "Tianci . Yin" <tianci.yin@....com>,
        Marek Olšák <marek.olsak@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        "moderated list:DMA BUFFER SHARING FRAMEWORK" 
        <linaro-mm-sig@...ts.linaro.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        Linux Upstreaming Team <linux@...lessm.com>,
        linux-media <linux-media@...r.kernel.org>
Subject: Re: [PATCH] drm/radeon: drm/amdgpu: Disable [1002:6611] in radeon

On Thu, Apr 30, 2020 at 9:08 AM Jian-Hong Pan <jian-hong@...lessm.com> wrote:
>
> The AMD/ATI Oland [1002:6611]'s HDMI output status is not synchronous
> as shown on UI after hot re-plug the HDMI cable, if it is radeon in
> used. The amdgpu module does not hit this issue.
>
> This patch disables [1002:6611] in radeon and enables it in amdgpu.
>
> Fixes: https://gitlab.freedesktop.org/drm/amd/-/issues/1117
> Signed-off-by: Jian-Hong Pan <jian-hong@...lessm.com>

Nack.  Amdgpu does not have support for VCE or UVD yet so you are just
trading one issue for another.  It would be better to figure out why
the audio is not updated properly in some cases.

Alex

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 11 +++++++++++
>  include/drm/drm_pciids.h                |  1 -
>  2 files changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> index 8ea86ffdea0d..1ad6f13a5bc0 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> @@ -1017,6 +1017,15 @@ MODULE_DEVICE_TABLE(pci, pciidlist);
>
>  static struct drm_driver kms_driver;
>
> +static void amdgpu_pci_fixup(struct pci_dev *pdev)
> +{
> +#ifdef CONFIG_DRM_AMDGPU_SI
> +       /* [1002:6611] is disabled in radeon, so enable si_support in amdgpu. */
> +       if (pdev->vendor == PCI_VENDOR_ID_ATI && pdev->device == 0x6611)
> +               amdgpu_si_support = 1;
> +#endif
> +}
> +
>  static int amdgpu_pci_probe(struct pci_dev *pdev,
>                             const struct pci_device_id *ent)
>  {
> @@ -1036,6 +1045,8 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
>                 return -ENODEV;
>         }
>
> +       amdgpu_pci_fixup(pdev);
> +
>  #ifdef CONFIG_DRM_AMDGPU_SI
>         if (!amdgpu_si_support) {
>                 switch (flags & AMD_ASIC_MASK) {
> diff --git a/include/drm/drm_pciids.h b/include/drm/drm_pciids.h
> index b7e899ce44f0..57368a0f5b82 100644
> --- a/include/drm/drm_pciids.h
> +++ b/include/drm/drm_pciids.h
> @@ -171,7 +171,6 @@
>         {0x1002, 0x6607, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_OLAND|RADEON_IS_MOBILITY|RADEON_NEW_MEMMAP}, \
>         {0x1002, 0x6608, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_OLAND|RADEON_NEW_MEMMAP}, \
>         {0x1002, 0x6610, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_OLAND|RADEON_NEW_MEMMAP}, \
> -       {0x1002, 0x6611, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_OLAND|RADEON_NEW_MEMMAP}, \
>         {0x1002, 0x6613, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_OLAND|RADEON_NEW_MEMMAP}, \
>         {0x1002, 0x6617, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_OLAND|RADEON_IS_MOBILITY|RADEON_NEW_MEMMAP}, \
>         {0x1002, 0x6620, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_OLAND|RADEON_IS_MOBILITY|RADEON_NEW_MEMMAP}, \
> --
> 2.26.2
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

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