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drm/amdgpu: add get_rom_offset callback for NBIO 6.3.2

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Add the get_rom_offset callback to retrieve the VBIOS ROM offset
from REGS_ROM_OFFSET_CTRL for vbios imaging fetching from spirom.

Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Le Ma 2026-07-30 15:55:46 +08:00 committed by Alex Deucher
parent e37e02f74b
commit 73a2a3b172
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/drm/amd/amdgpu/nbio_v6_3_2.c
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@ -83,6 +83,21 @@ static u32 nbio_v6_3_2_get_memsize(struct amdgpu_device *adev)
return RREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF0_RCC_CONFIG_MEMSIZE);
}
static u32 nbio_v6_3_2_get_rom_offset(struct amdgpu_device *adev)
{
u32 data, rom_offset;
data = RREG32_SOC15(NBIO, 0, regREGS_ROM_OFFSET_CTRL);
rom_offset = REG_GET_FIELD(data, REGS_ROM_OFFSET_CTRL, ROM_OFFSET);
/* Temp W/A for nbio v6.3.2. Retrieving rom_offset as 1 but vbios
* image is actually located from offset 2
*/
rom_offset += 1;
return rom_offset;
}
static void nbio_v6_3_2_enable_doorbell_aperture(struct amdgpu_device *adev,
bool enable)
{
@ -366,4 +381,5 @@ const struct amdgpu_nbio_funcs nbio_v6_3_2_funcs = {
.sdma_doorbell_range = nbio_v6_3_2_sdma_doorbell_range,
.vcn_doorbell_range = nbio_v6_3_2_vcn_doorbell_range,
.init_registers = nbio_v6_3_2_init_registers,
.get_rom_offset = nbio_v6_3_2_get_rom_offset,
};