[PATCH] drm/amdgpu: soc15 pcie gen4 support

[Xu, Feifei]

Yes, seems un-necessary in current implementation.
 
Thanks,
Feifei

-----Original Message-----
From: Lazar, Lijo <Lijo.Lazar at amd.com> 
Sent: Thursday, March 4, 2021 3:38 PM
To: Chen, Guchun <Guchun.Chen at amd.com>; Alex Deucher <alexdeucher at gmail.com>; Xu, Feifei <Feifei.Xu at amd.com>
Cc: amd-gfx list <amd-gfx at lists.freedesktop.org>; Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: RE: [PATCH] drm/amdgpu: soc15 pcie gen4 support

[AMD Public Use]

This function is doing nothing, is it necessary to maintain it? Not sure, if pcie gen support needs to be enabled specifically in driver.

Thanks,
Lijo

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Chen, Guchun
Sent: Thursday, March 4, 2021 1:06 PM
To: Alex Deucher <alexdeucher at gmail.com>; Xu, Feifei <Feifei.Xu at amd.com>
Cc: amd-gfx list <amd-gfx at lists.freedesktop.org>; Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: RE: [PATCH] drm/amdgpu: soc15 pcie gen4 support

[AMD Public Use]

How about module parameter check amdgpu_pcie_gen2 in soc15_pcie_gen4_enable? Is it necessary to modify it as well?

Regards,
Guchun

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Alex Deucher
Sent: Thursday, March 4, 2021 11:58 AM
To: Xu, Feifei <Feifei.Xu at amd.com>
Cc: amd-gfx list <amd-gfx at lists.freedesktop.org>; Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: Re: [PATCH] drm/amdgpu: soc15 pcie gen4 support

On Wed, Mar 3, 2021 at 10:46 PM Feifei Xu <Feifei.Xu at amd.com> wrote:
>
> Signed-off-by: Feifei Xu <Feifei.Xu at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/amd/amdgpu/soc15.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c 
> b/drivers/gpu/drm/amd/amdgpu/soc15.c
> index 28b991904eaa..437cdc56bdc5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
> @@ -569,7 +569,7 @@ static int soc15_set_vce_clocks(struct amdgpu_device *adev, u32 evclk, u32 ecclk
>         return 0;
>  }
>
> -static void soc15_pcie_gen3_enable(struct amdgpu_device *adev)
> +static void soc15_pcie_gen4_enable(struct amdgpu_device *adev)
>  {
>         if (pci_is_root_bus(adev->pdev->bus))
>                 return;
> @@ -581,7 +581,8 @@ static void soc15_pcie_gen3_enable(struct amdgpu_device *adev)
>                 return;
>
>         if (!(adev->pm.pcie_gen_mask & (CAIL_PCIE_LINK_SPEED_SUPPORT_GEN2 |
> -                                       CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3)))
> +                                       CAIL_PCIE_LINK_SPEED_SUPPORT_GEN3 |
> +                                       
> + CAIL_PCIE_LINK_SPEED_SUPPORT_GEN4)))
>                 return;
>
>         /* todo */
> @@ -1374,8 +1375,8 @@ static int soc15_common_hw_init(void *handle)  {
>         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>
> -       /* enable pcie gen2/3 link */
> -       soc15_pcie_gen3_enable(adev);
> +       /* enable pcie gen2/3/4 link */
> +       soc15_pcie_gen4_enable(adev);
>         /* enable aspm */
>         soc15_program_aspm(adev);
>         /* setup nbio registers */
> --
> 2.25.1
>
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