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

Needed as a fallback if the vbios can't be fetched by other means.

Reviewed-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2019-11-13 14:27:54 -05:00
parent c0e21ea1d0
commit f8a69a8022
1 changed files with 22 additions and 2 deletions
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22
drivers/gpu/drm/amd/amdgpu/nv.c
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@ -40,6 +40,7 @@
#include "gc/gc_10_1_0_sh_mask.h" #include "gc/gc_10_1_0_sh_mask.h"
#include "hdp/hdp_5_0_0_offset.h" #include "hdp/hdp_5_0_0_offset.h"
#include "hdp/hdp_5_0_0_sh_mask.h" #include "hdp/hdp_5_0_0_sh_mask.h"
#include "smuio/smuio_11_0_0_offset.h"
#include "soc15.h" #include "soc15.h"
#include "soc15_common.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, static bool nv_read_bios_from_rom(struct amdgpu_device *adev,
u8 *bios, u32 length_bytes) u8 *bios, u32 length_bytes)
{ {
/* TODO: will implement it when SMU header is available */ u32 *dw_ptr;
u32 i, length_dw;
if (bios == NULL)
return false; 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[] = { static struct soc15_allowed_register_entry nv_allowed_read_registers[] = {