diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 650e5bac225f372e819130b891f1d020b464f17f..7b9e4292ff53aa608244525063577baae0314abd 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1717,38 +1717,6 @@ static const struct adreno_gpu_funcs funcs = {
 	.get_timestamp = a5xx_get_timestamp,
 };
 
-static void check_speed_bin(struct device *dev)
-{
-	struct nvmem_cell *cell;
-	u32 val;
-
-	/*
-	 * If the OPP table specifies a opp-supported-hw property then we have
-	 * to set something with dev_pm_opp_set_supported_hw() or the table
-	 * doesn't get populated so pick an arbitrary value that should
-	 * ensure the default frequencies are selected but not conflict with any
-	 * actual bins
-	 */
-	val = 0x80;
-
-	cell = nvmem_cell_get(dev, "speed_bin");
-
-	if (!IS_ERR(cell)) {
-		void *buf = nvmem_cell_read(cell, NULL);
-
-		if (!IS_ERR(buf)) {
-			u8 bin = *((u8 *) buf);
-
-			val = (1 << bin);
-			kfree(buf);
-		}
-
-		nvmem_cell_put(cell);
-	}
-
-	devm_pm_opp_set_supported_hw(dev, &val, 1);
-}
-
 struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
 {
 	struct msm_drm_private *priv = dev->dev_private;
@@ -1771,8 +1739,6 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
 
 	a5xx_gpu->lm_leakage = 0x4E001A;
 
-	check_speed_bin(&pdev->dev);
-
 	nr_rings = 4;
 
 	if (config->info->revn == 510)
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 0db57e4b7596b01c091ed82510cf14cf2a8e0d03..ac6a8acceffc5b5ea0262c8ba49d5774f03894d8 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -2316,55 +2316,6 @@ static bool a6xx_progress(struct msm_gpu *gpu, struct msm_ringbuffer *ring)
 	return progress;
 }
 
-static u32 fuse_to_supp_hw(const struct adreno_info *info, u32 fuse)
-{
-	if (!info->speedbins)
-		return UINT_MAX;
-
-	for (int i = 0; info->speedbins[i].fuse != SHRT_MAX; i++)
-		if (info->speedbins[i].fuse == fuse)
-			return BIT(info->speedbins[i].speedbin);
-
-	return UINT_MAX;
-}
-
-static int a6xx_set_supported_hw(struct adreno_gpu *adreno_gpu,
-				 struct device *dev,
-				 const struct adreno_info *info)
-{
-	u32 supp_hw;
-	u32 speedbin;
-	int ret;
-
-	ret = adreno_read_speedbin(adreno_gpu, dev, &speedbin);
-	/*
-	 * -ENOENT/EOPNOTSUPP means that the platform doesn't support speedbin
-	 * which is fine
-	 */
-	if (ret == -ENOENT || ret == -EOPNOTSUPP) {
-		return 0;
-	} else if (ret) {
-		dev_err_probe(dev, ret,
-			      "failed to read speed-bin. Some OPPs may not be supported by hardware\n");
-		return ret;
-	}
-
-	supp_hw = fuse_to_supp_hw(info, speedbin);
-
-	if (supp_hw == UINT_MAX) {
-		DRM_DEV_ERROR(dev,
-			"missing support for speed-bin: %u. Some OPPs may not be supported by hardware\n",
-			speedbin);
-		supp_hw = BIT(0); /* Default */
-	}
-
-	ret = devm_pm_opp_set_supported_hw(dev, &supp_hw, 1);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
 static const struct adreno_gpu_funcs funcs = {
 	.base = {
 		.get_param = adreno_get_param,
@@ -2497,13 +2448,6 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 
 	a6xx_llc_slices_init(pdev, a6xx_gpu, is_a7xx);
 
-	ret = a6xx_set_supported_hw(adreno_gpu, &pdev->dev, config->info);
-	if (ret) {
-		a6xx_llc_slices_destroy(a6xx_gpu);
-		kfree(a6xx_gpu);
-		return ERR_PTR(ret);
-	}
-
 	if ((enable_preemption == 1) || (enable_preemption == -1 &&
 	    (config->info->quirks & ADRENO_QUIRK_PREEMPTION)))
 		ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs_a7xx, 4);
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index b0ec64e9a35591507f26e16b4ef60ec874dafe12..339e210db06398eae88f425574e684ea5b5ad68b 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -1093,13 +1093,13 @@ void adreno_gpu_ocmem_cleanup(struct adreno_ocmem *adreno_ocmem)
 			   adreno_ocmem->hdl);
 }
 
-int adreno_read_speedbin(struct adreno_gpu *adreno_gpu,
-			 struct device *dev, u32 *fuse)
+static int adreno_read_speedbin(struct adreno_gpu *adreno_gpu,
+				struct device *dev, u32 *fuse)
 {
 	int ret;
 
 	/*
-	 * Try reading the speedbin via a nvmem cell first
+	 * Try reading the speedbin via a nvmem cell first.
 	 * -ENOENT means "no nvmem-cells" and essentially means "old DT" or
 	 * "nvmem fuse is irrelevant", simply assume it's fine.
 	 */
@@ -1114,8 +1114,7 @@ int adreno_read_speedbin(struct adreno_gpu *adreno_gpu,
 
 	/*
 	 * Only check the feature code - the product code only matters for
-	 * proto SoCs unavailable outside Qualcomm labs, as far as GPU bin
-	 * matching is concerned.
+	 * prototype SoCs, as far as GPU bin matching is concerned.
 	 *
 	 * Ignore EOPNOTSUPP, as not all SoCs expose this info through SMEM.
 	 */
@@ -1126,7 +1125,70 @@ int adreno_read_speedbin(struct adreno_gpu *adreno_gpu,
 		return dev_err_probe(dev, ret, "Couldn't get feature code from SMEM\n");
 #endif
 
-	return ret;
+	return 0;
+}
+
+#define ADRENO_SPEEDBIN_FUSE_NODATA	0xFFFF /* Made-up large value, expected by mesa */
+static int adreno_set_speedbin(struct adreno_gpu *adreno_gpu, struct device *dev)
+{
+	const struct adreno_info *info = adreno_gpu->info;
+	u32 fuse = ADRENO_SPEEDBIN_FUSE_NODATA;
+	u32 supp_hw = UINT_MAX;
+	int ret;
+
+	/* No speedbins defined for this GPU SKU => allow all defined OPPs. */
+	if (!info->speedbins) {
+		/*
+		 * Due to OPP framework's safety assumptions, the speedbin data
+		 * must be defined either in both the driver catalog and DT, or
+		 * in neither.
+		 *
+		 * This means that having a too old DT (with no opp-supported-hw)
+		 * or a "too new" one (with opp-supported-hw, but the kernel not
+		 * having the fuse matching tables) becomes a problem.
+		 *
+		 * We can only work around one of these at a time, so choose the
+		 * more real issue of outdated DT and skip setting compatibility
+		 * constraints so as not to trip off any alarms in _opp_is_supported()
+		 */
+		adreno_gpu->speedbin = ADRENO_SPEEDBIN_FUSE_NODATA;
+
+		return 0;
+	}
+
+	/*
+	 * If a real error (not counting older devicetrees having no nvmem references)
+	 * occurs when trying to get the fuse value, bail out.
+	 */
+	ret = adreno_read_speedbin(adreno_gpu, dev, &fuse);
+	if (ret) {
+		return ret;
+	} else if (fuse == ADRENO_SPEEDBIN_FUSE_NODATA) {
+		/* The info struct has speedbin data, but the DT doesn't => allow all OPPs */
+		DRM_DEV_INFO(dev, "No GPU speed bin fuse, please update your device tree\n");
+
+		/*
+		 * In this case, the DT doesn't point us to speedbin info.
+		 * We can then assume the opp-supported-hw properties are missing as well,
+		 * as having one in place but not the other would be rather invalid anyway.
+		 *
+		 * We're not calling set_supported_hw(ALLOW_ALL_OPPS) here, as OPP APIs
+		 * would then still expect opp-supported-hw, which we may lack
+		 */
+		return 0;
+	}
+
+	adreno_gpu->speedbin = fuse;
+
+	/* Traverse the known speedbins */
+	for (int i = 0; info->speedbins[i].fuse != SHRT_MAX; i++) {
+		if (info->speedbins[i].fuse == fuse) {
+			supp_hw = BIT(info->speedbins[i].speedbin);
+			return devm_pm_opp_set_supported_hw(dev, &supp_hw, 1);
+		}
+	}
+
+	return dev_err_probe(dev, -EINVAL, "Unknown speed bin fuse value: 0x%x\n", fuse);
 }
 
 int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
@@ -1138,7 +1200,6 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 	struct msm_gpu_config adreno_gpu_config  = { 0 };
 	struct msm_gpu *gpu = &adreno_gpu->base;
 	const char *gpu_name;
-	u32 speedbin;
 	int ret;
 
 	adreno_gpu->funcs = funcs;
@@ -1166,9 +1227,9 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 			devm_pm_opp_set_clkname(dev, "core");
 	}
 
-	if (adreno_read_speedbin(adreno_gpu, dev, &speedbin) || !speedbin)
-		speedbin = 0xffff;
-	adreno_gpu->speedbin = speedbin;
+	ret = adreno_set_speedbin(adreno_gpu, dev);
+	if (ret)
+		return ret;
 
 	gpu_name = devm_kasprintf(dev, GFP_KERNEL, "%"ADRENO_CHIPID_FMT,
 			ADRENO_CHIPID_ARGS(config->chip_id));
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
index 3946b9e992b9a8e2fd81f3e03354f9f83717b270..bc46ed5608cd3f5c05142826a03b97d5cdab9eff 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
@@ -638,9 +638,6 @@ int adreno_fault_handler(struct msm_gpu *gpu, unsigned long iova, int flags,
 			 struct adreno_smmu_fault_info *info, const char *block,
 			 u32 scratch[4]);
 
-int adreno_read_speedbin(struct adreno_gpu *adreno_gpu,
-			 struct device *dev, u32 *speedbin);
-
 /*
  * For a5xx and a6xx targets load the zap shader that is used to pull the GPU
  * out of secure mode
