drm/amd/pm: Add mode2 support for smu_v15_0_8

Add initial mode2 support for smu_v15_0_8

v2: Move out non smu code, remove pci save/restore logic (Lijo)
v3: squash in updated msg (Alex)

Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c
index c4da0cdc1222adb44fa63711d0d3fbbaf4842d44..b3dc04ea5e71385ab36fb195104e0db78b276853 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu15/smu_v15_0_8_ppt.c
@@ -430,6 +430,49 @@ static bool smu_v15_0_8_is_dpm_running(struct smu_context *smu)
                                          smu_v15_0_8_dpm_features.bits);
 }
 
+static int smu_v15_0_8_mode2_reset(struct smu_context *smu)
+{
+       struct smu_msg_ctl *ctl = &smu->msg_ctl;
+       struct amdgpu_device *adev = smu->adev;
+       int timeout = 10;
+       int ret = 0;
+
+       mutex_lock(&ctl->lock);
+
+       ret = smu_msg_send_async_locked(ctl, SMU_MSG_GfxDeviceDriverReset,
+                                       SMU_RESET_MODE_2);
+
+       if (ret)
+               goto out;
+
+       /* Reset takes a bit longer, wait for 200ms. */
+       msleep(200);
+
+       dev_dbg(adev->dev, "wait for reset ack\n");
+       do {
+               ret = smu_msg_wait_response(ctl, 0);
+               /* Wait a bit more time for getting ACK */
+               if (ret == -ETIME) {
+                       --timeout;
+                       usleep_range(500, 1000);
+                       continue;
+               }
+
+               if (ret)
+                       goto out;
+
+       } while (ret == -ETIME && timeout);
+
+out:
+       mutex_unlock(&ctl->lock);
+
+       if (ret)
+               dev_err(adev->dev, "failed to send mode2 reset, error code %d",
+                       ret);
+
+       return ret;
+}
+
 static const struct pptable_funcs smu_v15_0_8_ppt_funcs = {
        .init_allowed_features = smu_v15_0_8_init_allowed_features,
        .set_default_dpm_table = smu_v15_0_8_set_default_dpm_table,
@@ -450,6 +493,7 @@ static const struct pptable_funcs smu_v15_0_8_ppt_funcs = {
        .setup_pptable = smu_v15_0_8_setup_pptable,
        .get_pp_feature_mask = smu_cmn_get_pp_feature_mask,
        .wait_for_event = smu_v15_0_wait_for_event,
+       .mode2_reset = smu_v15_0_8_mode2_reset,
 };
 
 static void smu_v15_0_8_init_msg_ctl(struct smu_context *smu,