[PATCH 2/2] drm/amd/powerplay: check SMU engine readiness before proceeding on S3 resume

[Quan, Evan]

This is especially needed for non-psp loading way.

Change-Id: I1e523168ed4892c34c8cbb66077c3f9288dd8006
Signed-off-by: Evan Quan <evan.q...@amd.com>
---
 drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 28 ++++++++++++++++++----
 1 file changed, 23 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c 
b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 25f3c9e1b404..95969c98a108 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -1213,11 +1213,10 @@ static int smu_free_memory_pool(struct smu_context *smu)
        return ret;
 }
 
-static int smu_hw_init(void *handle)
+static int smu_start_smc_engine(struct smu_context *smu)
 {
-       int ret;
-       struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-       struct smu_context *smu = &adev->smu;
+       struct amdgpu_device *adev = smu->adev;
+       int ret = 0;
 
        if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
                if (adev->asic_type < CHIP_NAVI10) {
@@ -1228,8 +1227,21 @@ static int smu_hw_init(void *handle)
        }
 
        ret = smu_check_fw_status(smu);
+       if (ret)
+               pr_err("SMC is not ready\n");
+
+       return ret;
+}
+
+static int smu_hw_init(void *handle)
+{
+       int ret;
+       struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+       struct smu_context *smu = &adev->smu;
+
+       ret = smu_start_smc_engine(smu);
        if (ret) {
-               pr_err("SMC firmware status is not correct\n");
+               pr_err("SMU is not ready yet!\n");
                return ret;
        }
 
@@ -1389,6 +1401,12 @@ static int smu_resume(void *handle)
 
        mutex_lock(&smu->mutex);
 
+       ret = smu_start_smc_engine(smu);
+       if (ret) {
+               pr_err("SMU is not ready yet!\n");
+               return ret;
+       }
+
        ret = smu_smc_table_hw_init(smu, false);
        if (ret)
                goto failed;
-- 
2.23.0

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