[PATCH] drm/amdgpu/nv: add asic func for fetching vbios from rom directly

[Alex Deucher]

Ping?

On Wed, Nov 13, 2019 at 2:29 PM Alex Deucher <alexdeucher at gmail.com> wrote:
>
> Needed as a fallback if the vbios can't be fetched by other means.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/nv.c | 24 ++++++++++++++++++++++--
>  1 file changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
> index 7283d6198b89..ad04d1d6e9c7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nv.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nv.c
> @@ -40,6 +40,7 @@
>  #include "gc/gc_10_1_0_sh_mask.h"
>  #include "hdp/hdp_5_0_0_offset.h"
>  #include "hdp/hdp_5_0_0_sh_mask.h"
> +#include "smuio/smuio_11_0_0_offset.h"
>
>  #include "soc15.h"
>  #include "soc15_common.h"
> @@ -156,8 +157,27 @@ static bool nv_read_disabled_bios(struct amdgpu_device *adev)
>  static bool nv_read_bios_from_rom(struct amdgpu_device *adev,
>                                   u8 *bios, u32 length_bytes)
>  {
> -       /* TODO: will implement it when SMU header is available */
> -       return false;
> +       u32 *dw_ptr;
> +       u32 i, length_dw;
> +
> +       if (bios == NULL)
> +               return false;
> +       if (length_bytes == 0)
> +               return false;
> +       /* APU vbios image is part of sbios image */
> +       if (adev->flags & AMD_IS_APU)
> +               return false;
> +
> +       dw_ptr = (u32 *)bios;
> +       length_dw = ALIGN(length_bytes, 4) / 4;
> +
> +       /* set rom index to 0 */
> +       WREG32(SOC15_REG_OFFSET(SMUIO, 0, mmROM_INDEX), 0);
> +       /* read out the rom data */
> +       for (i = 0; i < length_dw; i++)
> +               dw_ptr[i] = RREG32(SOC15_REG_OFFSET(SMUIO, 0, mmROM_DATA));
> +
> +       return true;
>  }
>
>  static struct soc15_allowed_register_entry nv_allowed_read_registers[] = {
> --
> 2.23.0
>