[PATCH] drm/amdgpu/discovery: fix fw based ip discovery

Alex Deucher alexdeucher at gmail.com
Mon Aug 4 14:16:11 UTC 2025


Ping?

Alex

On Wed, Jul 30, 2025 at 12:18 PM Alex Deucher <alexander.deucher at amd.com> wrote:
>
> We only need the fw based discovery table for sysfs.  No
> need to parse it.  Additionally parsing some of the board
> specific tables may result in incorrect data on some boards.
> just load the binary and don't parse it on those boards.
>
> Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4441
> Fixes: 80a0e8282933 ("drm/amdgpu/discovery: optionally use fw based ip discovery")
> Cc: stable at vger.kernel.org
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    |  5 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 72 ++++++++++---------
>  2 files changed, 41 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index efe98ffb679a4..b2538cff222ce 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2570,9 +2570,6 @@ static int amdgpu_device_parse_gpu_info_fw(struct amdgpu_device *adev)
>
>         adev->firmware.gpu_info_fw = NULL;
>
> -       if (adev->mman.discovery_bin)
> -               return 0;
> -
>         switch (adev->asic_type) {
>         default:
>                 return 0;
> @@ -2594,6 +2591,8 @@ static int amdgpu_device_parse_gpu_info_fw(struct amdgpu_device *adev)
>                 chip_name = "arcturus";
>                 break;
>         case CHIP_NAVI12:
> +               if (adev->mman.discovery_bin)
> +                       return 0;
>                 chip_name = "navi12";
>                 break;
>         }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
> index 81b3443c8d7f4..27bd7659961e8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
> @@ -2555,40 +2555,11 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
>
>         switch (adev->asic_type) {
>         case CHIP_VEGA10:
> -       case CHIP_VEGA12:
> -       case CHIP_RAVEN:
> -       case CHIP_VEGA20:
> -       case CHIP_ARCTURUS:
> -       case CHIP_ALDEBARAN:
> -               /* this is not fatal.  We have a fallback below
> -                * if the new firmwares are not present. some of
> -                * this will be overridden below to keep things
> -                * consistent with the current behavior.
> +               /* This is not fatal.  We only need the discovery
> +                * binary for sysfs.  We don't need it for a
> +                * functional system.
>                  */
> -               r = amdgpu_discovery_reg_base_init(adev);
> -               if (!r) {
> -                       amdgpu_discovery_harvest_ip(adev);
> -                       amdgpu_discovery_get_gfx_info(adev);
> -                       amdgpu_discovery_get_mall_info(adev);
> -                       amdgpu_discovery_get_vcn_info(adev);
> -               }
> -               break;
> -       default:
> -               r = amdgpu_discovery_reg_base_init(adev);
> -               if (r) {
> -                       drm_err(&adev->ddev, "discovery failed: %d\n", r);
> -                       return r;
> -               }
> -
> -               amdgpu_discovery_harvest_ip(adev);
> -               amdgpu_discovery_get_gfx_info(adev);
> -               amdgpu_discovery_get_mall_info(adev);
> -               amdgpu_discovery_get_vcn_info(adev);
> -               break;
> -       }
> -
> -       switch (adev->asic_type) {
> -       case CHIP_VEGA10:
> +               amdgpu_discovery_init(adev);
>                 vega10_reg_base_init(adev);
>                 adev->sdma.num_instances = 2;
>                 adev->gmc.num_umc = 4;
> @@ -2611,6 +2582,11 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
>                 adev->ip_versions[DCI_HWIP][0] = IP_VERSION(12, 0, 0);
>                 break;
>         case CHIP_VEGA12:
> +               /* This is not fatal.  We only need the discovery
> +                * binary for sysfs.  We don't need it for a
> +                * functional system.
> +                */
> +               amdgpu_discovery_init(adev);
>                 vega10_reg_base_init(adev);
>                 adev->sdma.num_instances = 2;
>                 adev->gmc.num_umc = 4;
> @@ -2633,6 +2609,11 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
>                 adev->ip_versions[DCI_HWIP][0] = IP_VERSION(12, 0, 1);
>                 break;
>         case CHIP_RAVEN:
> +               /* This is not fatal.  We only need the discovery
> +                * binary for sysfs.  We don't need it for a
> +                * functional system.
> +                */
> +               amdgpu_discovery_init(adev);
>                 vega10_reg_base_init(adev);
>                 adev->sdma.num_instances = 1;
>                 adev->vcn.num_vcn_inst = 1;
> @@ -2674,6 +2655,11 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
>                 }
>                 break;
>         case CHIP_VEGA20:
> +               /* This is not fatal.  We only need the discovery
> +                * binary for sysfs.  We don't need it for a
> +                * functional system.
> +                */
> +               amdgpu_discovery_init(adev);
>                 vega20_reg_base_init(adev);
>                 adev->sdma.num_instances = 2;
>                 adev->gmc.num_umc = 8;
> @@ -2697,6 +2683,11 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
>                 adev->ip_versions[DCI_HWIP][0] = IP_VERSION(12, 1, 0);
>                 break;
>         case CHIP_ARCTURUS:
> +               /* This is not fatal.  We only need the discovery
> +                * binary for sysfs.  We don't need it for a
> +                * functional system.
> +                */
> +               amdgpu_discovery_init(adev);
>                 arct_reg_base_init(adev);
>                 adev->sdma.num_instances = 8;
>                 adev->vcn.num_vcn_inst = 2;
> @@ -2725,6 +2716,11 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
>                 adev->ip_versions[UVD_HWIP][1] = IP_VERSION(2, 5, 0);
>                 break;
>         case CHIP_ALDEBARAN:
> +               /* This is not fatal.  We only need the discovery
> +                * binary for sysfs.  We don't need it for a
> +                * functional system.
> +                */
> +               amdgpu_discovery_init(adev);
>                 aldebaran_reg_base_init(adev);
>                 adev->sdma.num_instances = 5;
>                 adev->vcn.num_vcn_inst = 2;
> @@ -2751,6 +2747,16 @@ int amdgpu_discovery_set_ip_blocks(struct amdgpu_device *adev)
>                 adev->ip_versions[XGMI_HWIP][0] = IP_VERSION(6, 1, 0);
>                 break;
>         default:
> +               r = amdgpu_discovery_reg_base_init(adev);
> +               if (r) {
> +                       drm_err(&adev->ddev, "discovery failed: %d\n", r);
> +                       return r;
> +               }
> +
> +               amdgpu_discovery_harvest_ip(adev);
> +               amdgpu_discovery_get_gfx_info(adev);
> +               amdgpu_discovery_get_mall_info(adev);
> +               amdgpu_discovery_get_vcn_info(adev);
>                 break;
>         }
>
> --
> 2.50.1
>


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