This allows us to read the vbios image directly from ROM. This is already implemented for other asics, but was not yet available for SI.
Signed-off-by: Alex Deucher <[email protected]> --- drivers/gpu/drm/amd/amdgpu/si.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/si.c b/drivers/gpu/drm/amd/amdgpu/si.c index dca956d..3f3e367 100644 --- a/drivers/gpu/drm/amd/amdgpu/si.c +++ b/drivers/gpu/drm/amd/amdgpu/si.c @@ -1150,6 +1150,33 @@ static bool si_read_disabled_bios(struct amdgpu_device *adev) return r; } +#define mmROM_INDEX 0x2A +#define mmROM_DATA 0x2B + +static bool si_read_bios_from_rom(struct amdgpu_device *adev, + u8 *bios, u32 length_bytes) +{ + 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(mmROM_INDEX, 0); + for (i = 0; i < length_dw; i++) + dw_ptr[i] = RREG32(mmROM_DATA); + + return true; +} + //xxx: not implemented static int si_asic_reset(struct amdgpu_device *adev) { @@ -1218,6 +1245,7 @@ static void si_invalidate_hdp(struct amdgpu_device *adev) static const struct amdgpu_asic_funcs si_asic_funcs = { .read_disabled_bios = &si_read_disabled_bios, + .read_bios_from_rom = &si_read_bios_from_rom, .read_register = &si_read_register, .reset = &si_asic_reset, .set_vga_state = &si_vga_set_state, -- 2.5.5 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
