drm/amdgpu: fix to clear ASIC INIT COMPLETE bit on resuming phase

ASIC_INIT_COMPLETE bit must be cleared during S3 resuming phase,
because VBIOS will check the bit to decide if execute ASIC_Init
posting via kernel driver.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index 4b9abd68e04f..d735cd1807b3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -26,6 +26,7 @@
 #include "atomfirmware.h"
 #include "amdgpu_atomfirmware.h"
 #include "atom.h"
+#include "atombios.h"
 
 #define get_index_into_master_table(master_table, table_name) (offsetof(struct master_table, table_name) / sizeof(uint16_t))
 
@@ -77,6 +78,12 @@ void amdgpu_atomfirmware_scratch_regs_restore(struct amdgpu_device *adev)
 {
         int i;
 
+        /*
+         * VBIOS will check ASIC_INIT_COMPLETE bit to decide if
+         * execute ASIC_Init posting via driver
+         */
+        adev->bios_scratch[7] &= ~ATOM_S7_ASIC_INIT_COMPLETE_MASK;
+
         for (i = 0; i < AMDGPU_BIOS_NUM_SCRATCH; i++)
                 WREG32(adev->bios_scratch_reg_offset + i, adev->bios_scratch[i]);
 }