drm/msm/adreno: Expose speedbin to userspace

Expose speedbin through MSM_PARAM_CHIP_ID parameter to help userspace
identify the sku.

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Link: https://lore.kernel.org/r/20220226005021.v2.4.I86c32730e08cba9e5c83f02ec17885124d45fa56@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>

Author: Akhil P Oommen

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -10,7 +10,6 @@
 
 #include <linux/bitfield.h>
 #include <linux/devfreq.h>
-#include <linux/nvmem-consumer.h>
 #include <linux/soc/qcom/llcc-qcom.h>
 
 #define GPU_PAS_ID 13
@@ -1774,7 +1773,7 @@ static int a6xx_set_supported_hw(struct device *dev, struct adreno_rev rev)
 	u32 speedbin;
 	int ret;
 
-	ret = nvmem_cell_read_variable_le_u32(dev, "speed_bin", &speedbin);
+	ret = adreno_read_speedbin(dev, &speedbin);
 	/*
 	 * -ENOENT means that the platform doesn't support speedbin which is
 	 * fine

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

@@ -14,6 +14,7 @@
 #include <linux/pm_opp.h>
 #include <linux/slab.h>
 #include <linux/soc/qcom/mdt_loader.h>
+#include <linux/nvmem-consumer.h>
 #include <soc/qcom/ocmem.h>
 #include "adreno_gpu.h"
 #include "a6xx_gpu.h"
@@ -243,10 +244,12 @@ int adreno_get_param(struct msm_gpu *gpu, struct msm_file_private *ctx,
 		*value = !adreno_is_a650_family(adreno_gpu) ? 0x100000 : 0;
 		return 0;
 	case MSM_PARAM_CHIP_ID:
-		*value = adreno_gpu->rev.patchid |
-				(adreno_gpu->rev.minor << 8) |
-				(adreno_gpu->rev.major << 16) |
-				(adreno_gpu->rev.core << 24);
+		*value = (uint64_t) adreno_gpu->rev.patchid |
+				(uint64_t) (adreno_gpu->rev.minor << 8) |
+				(uint64_t) (adreno_gpu->rev.major << 16) |
+				(uint64_t) (adreno_gpu->rev.core << 24);
+		if (!adreno_gpu->info->revn)
+			*value |= ((uint64_t) adreno_gpu->speedbin) << 32;
 		return 0;
 	case MSM_PARAM_MAX_FREQ:
 		*value = adreno_gpu->base.fast_rate;
@@ -922,6 +925,11 @@ void adreno_gpu_ocmem_cleanup(struct adreno_ocmem *adreno_ocmem)
 			   adreno_ocmem->hdl);
 }
 
+int adreno_read_speedbin(struct device *dev, u32 *speedbin)
+{
+	return nvmem_cell_read_variable_le_u32(dev, "speed_bin", speedbin);
+}
+
 int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 		struct adreno_gpu *adreno_gpu,
 		const struct adreno_gpu_funcs *funcs, int nr_rings)
@@ -932,13 +940,18 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 	struct msm_gpu *gpu = &adreno_gpu->base;
 	struct adreno_rev *rev = &config->rev;
 	const char *gpu_name;
+	u32 speedbin;
 
 	adreno_gpu->funcs = funcs;
 	adreno_gpu->info = adreno_info(config->rev);
 	adreno_gpu->gmem = adreno_gpu->info->gmem;
 	adreno_gpu->revn = adreno_gpu->info->revn;
 	adreno_gpu->rev = *rev;
 
+	if (adreno_read_speedbin(dev, &speedbin) || !speedbin)
+		speedbin = 0xffff;
+	adreno_gpu->speedbin = (uint16_t) (0xffff & speedbin);
+
 	gpu_name = adreno_gpu->info->name;
 	if (!gpu_name) {
 		gpu_name = devm_kasprintf(dev, GFP_KERNEL, "%d.%d.%d.%d",

drivers/gpu/drm/msm/adreno/adreno_gpu.h

@@ -80,6 +80,7 @@ struct adreno_gpu {
 	const struct adreno_info *info;
 	uint32_t gmem;  /* actual gmem size */
 	uint32_t revn;  /* numeric revision name */
+	uint16_t speedbin;
 	const struct adreno_gpu_funcs *funcs;
 
 	/* interesting register offsets to dump: */
@@ -325,6 +326,8 @@ adreno_iommu_create_address_space(struct msm_gpu *gpu,
 
 void adreno_set_llc_attributes(struct iommu_domain *iommu);
 
+int adreno_read_speedbin(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