Needed as a fallback if the vbios can't be fetched by other means.
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
---
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
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