ASoC: Intel: bxtn: Update DSP core state in D0

In system suspend, firmware needs to be re-downloaded as IMR is cleared.
When firmware is downloaded in D0, core state is not set to running
state causing instability with subsequent D0-D3 cycles.

So set the core state correctly during D0 and check the DSP core state
if not in reset to set the DSP to D3.
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/skylake/bxt-sst.c

@@ -446,6 +446,7 @@ static int bxt_set_dsp_D0(struct sst_dsp *ctx, unsigned int core_id)
 				return ret;
 			}
 		}
+		skl->cores.state[core_id] = SKL_DSP_RUNNING;
 		return ret;
 	}
 

sound/soc/intel/skylake/skl-sst-dsp.c

@@ -355,12 +355,13 @@ int skl_dsp_get_core(struct sst_dsp *ctx, unsigned int core_id)
 		ret = ctx->fw_ops.set_state_D0(ctx, core_id);
 		if (ret < 0) {
 			dev_err(ctx->dev, "unable to get core%d\n", core_id);
-			return ret;
+			goto out;
 		}
 	}
 
 	skl->cores.usage_count[core_id]++;
 
+out:
 	dev_dbg(ctx->dev, "core id %d state %d usage_count %d\n",
 			core_id, skl->cores.state[core_id],
 			skl->cores.usage_count[core_id]);
@@ -379,7 +380,8 @@ int skl_dsp_put_core(struct sst_dsp *ctx, unsigned int core_id)
 		return -EINVAL;
 	}
 
-	if (--skl->cores.usage_count[core_id] == 0) {
+	if ((--skl->cores.usage_count[core_id] == 0) &&
+		(skl->cores.state[core_id] != SKL_DSP_RESET)) {
 		ret = ctx->fw_ops.set_state_D3(ctx, core_id);
 		if (ret < 0) {
 			dev_err(ctx->dev, "unable to put core %d: %d\n",