drm/msm/a6xx: Move ioremap out of hw_init path

Move the one-time RPMh setup to a6xx_gmu_init().  To get rid of the hack
for one-time init vs start, add in an extra a6xx_rpmh_stop() at the end
of the init sequence.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/527854/
Link: https://lore.kernel.org/r/20230320144356.803762-15-robdclark@gmail.com

drivers/gpu/drm/msm/adreno/a6xx_gmu.c

@@ -621,6 +621,8 @@ static void a6xx_gmu_rpmh_init(struct a6xx_gmu *gmu)
 	/* ensure no writes happen before the uCode is fully written */
 	wmb();
 
+	a6xx_rpmh_stop(gmu);
+
 err:
 	if (!IS_ERR_OR_NULL(pdcptr))
 		iounmap(pdcptr);
@@ -753,7 +755,6 @@ static int a6xx_gmu_fw_load(struct a6xx_gmu *gmu)
 
 static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
 {
-	static bool rpmh_init;
 	struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu);
 	struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
 	int ret;
@@ -776,15 +777,9 @@ static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned int state)
 		/* Turn on register retention */
 		gmu_write(gmu, REG_A6XX_GMU_GENERAL_7, 1);
 
-		/* We only need to load the RPMh microcode once */
-		if (!rpmh_init) {
-			a6xx_gmu_rpmh_init(gmu);
-			rpmh_init = true;
-		} else {
-			ret = a6xx_rpmh_start(gmu);
-			if (ret)
-				return ret;
-		}
+		ret = a6xx_rpmh_start(gmu);
+		if (ret)
+			return ret;
 
 		ret = a6xx_gmu_fw_load(gmu);
 		if (ret)
@@ -1670,6 +1665,9 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
 	/* Set up the HFI queues */
 	a6xx_hfi_init(gmu);
 
+	/* Initialize RPMh */
+	a6xx_gmu_rpmh_init(gmu);
+
 	gmu->initialized = true;
 
 	return 0;