drm/amdgpu: add read_bios_from_rom callback for VI parts
Read the vbios image directly from the rom.
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c
index 2adc1c8..bf5bd93 100644
--- a/drivers/gpu/drm/amd/amdgpu/vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/vi.c
@@ -376,6 +376,38 @@
WREG32_SMC(ixROM_CNTL, rom_cntl);
return r;
}
+
+static bool vi_read_bios_from_rom(struct amdgpu_device *adev,
+ u8 *bios, u32 length_bytes)
+{
+ u32 *dw_ptr;
+ unsigned long flags;
+ 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;
+ /* take the smc lock since we are using the smc index */
+ spin_lock_irqsave(&adev->smc_idx_lock, flags);
+ /* set rom index to 0 */
+ WREG32(mmSMC_IND_INDEX_0, ixROM_INDEX);
+ WREG32(mmSMC_IND_DATA_0, 0);
+ /* set index to data for continous read */
+ WREG32(mmSMC_IND_INDEX_0, ixROM_DATA);
+ for (i = 0; i < length_dw; i++)
+ dw_ptr[i] = RREG32(mmSMC_IND_DATA_0);
+ spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
+
+ return true;
+}
+
static struct amdgpu_allowed_register_entry tonga_allowed_read_registers[] = {
{mmGB_MACROTILE_MODE7, true},
};
@@ -1368,6 +1400,7 @@
static const struct amdgpu_asic_funcs vi_asic_funcs =
{
.read_disabled_bios = &vi_read_disabled_bios,
+ .read_bios_from_rom = &vi_read_bios_from_rom,
.read_register = &vi_read_register,
.reset = &vi_asic_reset,
.set_vga_state = &vi_vga_set_state,