[PATCH 12/16] drm/msm/a6xx: Add SKU detection support for X2-85

[Akhil P Oommen <akhilpo@oss.qualcomm.com>]

Adreno X2-85 series present in Glymur chipset supports a new mechanism
for SKU detection. A new CX_MISC register exposes the combined (or
final) speedbin value from both HW fuse register and the Soft Fuse
register.

Implement this new SKU detection along with a new quirk to identify the
GPUs that has SOFT SKU support. Also, enable this quirk for Adreno X2-85
and add its SKU table to the catalog.

Signed-off-by: Akhil P Oommen <akhilpo@oss.qualcomm.com>
---
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c         |  6 ++++
 drivers/gpu/drm/msm/adreno/a6xx_catalog.c     |  9 +++++-
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c         | 41 ++++++++++++++++++++++-----
 drivers/gpu/drm/msm/adreno/adreno_gpu.c       |  5 ----
 drivers/gpu/drm/msm/adreno/adreno_gpu.h       |  1 +
 drivers/gpu/drm/msm/registers/adreno/a6xx.xml |  4 +++
 6 files changed, 53 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 79a441e91fa1..d7ed3225f635 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1731,6 +1731,7 @@ static struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
 	struct adreno_gpu *adreno_gpu;
 	struct msm_gpu *gpu;
 	unsigned int nr_rings;
+	u32 speedbin;
 	int ret;
 
 	a5xx_gpu = kzalloc(sizeof(*a5xx_gpu), GFP_KERNEL);
@@ -1757,6 +1758,11 @@ static struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
 		return ERR_PTR(ret);
 	}
 
+	/* Set the speedbin value that is passed to userspace */
+	if (adreno_read_speedbin(&pdev->dev, &speedbin) || !speedbin)
+		speedbin = 0xffff;
+	adreno_gpu->speedbin = (uint16_t) (0xffff & speedbin);
+
 	msm_mmu_set_fault_handler(to_msm_vm(gpu->vm)->mmu, gpu,
 				  a5xx_fault_handler);
 
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_catalog.c b/drivers/gpu/drm/msm/adreno/a6xx_catalog.c
index f6b9792531a6..758bc7bd31f6 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_catalog.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_catalog.c
@@ -1902,7 +1902,8 @@ static const struct adreno_info a8xx_gpus[] = {
 		.gmem = 21 * SZ_1M,
 		.inactive_period = DRM_MSM_INACTIVE_PERIOD,
 		.quirks = ADRENO_QUIRK_HAS_CACHED_COHERENT |
-			  ADRENO_QUIRK_HAS_HW_APRIV,
+			  ADRENO_QUIRK_HAS_HW_APRIV |
+			  ADRENO_QUIRK_SOFTFUSE,
 		.funcs = &a8xx_gpu_funcs,
 		.a6xx = &(const struct a6xx_info) {
 			.protect = &x285_protect,
@@ -1922,6 +1923,12 @@ static const struct adreno_info a8xx_gpus[] = {
 				{ /* sentinel */ },
 			},
 		},
+		.speedbins = ADRENO_SPEEDBINS(
+			{ 0,   0 },
+			{ 388, 1 },
+			{ 357, 2 },
+			{ 284, 3 },
+		),
 	}, {
 		.chip_ids = ADRENO_CHIP_IDS(0x44050a01),
 		.family = ADRENO_8XX_GEN2,
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index cbc803d90673..0fe6d803e628 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -2552,13 +2552,33 @@ static u32 fuse_to_supp_hw(const struct adreno_info *info, u32 fuse)
 	return UINT_MAX;
 }
 
-static int a6xx_set_supported_hw(struct device *dev, const struct adreno_info *info)
+static int a6xx_read_speedbin(struct device *dev, struct a6xx_gpu *a6xx_gpu,
+		const struct adreno_info *info, u32 *speedbin)
+{
+	int ret;
+
+	/* Use speedbin fuse if present. Otherwise, fallback to softfuse */
+	ret = adreno_read_speedbin(dev, speedbin);
+	if (ret != -ENOENT)
+		return ret;
+
+	if (info->quirks & ADRENO_QUIRK_SOFTFUSE) {
+		*speedbin = a6xx_llc_read(a6xx_gpu, REG_A8XX_CX_MISC_SW_FUSE_FREQ_LIMIT_STATUS);
+		*speedbin = A8XX_CX_MISC_SW_FUSE_FREQ_LIMIT_STATUS_FINALFREQLIMIT(*speedbin);
+		return 0;
+	}
+
+	return -ENOENT;
+}
+
+static int a6xx_set_supported_hw(struct device *dev, struct a6xx_gpu *a6xx_gpu,
+		const struct adreno_info *info)
 {
 	u32 supp_hw;
 	u32 speedbin;
 	int ret;
 
-	ret = adreno_read_speedbin(dev, &speedbin);
+	ret = a6xx_read_speedbin(dev, a6xx_gpu, info, &speedbin);
 	/*
 	 * -ENOENT means that the platform doesn't support speedbin which is
 	 * fine
@@ -2592,11 +2612,13 @@ static struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 	struct msm_drm_private *priv = dev->dev_private;
 	struct platform_device *pdev = priv->gpu_pdev;
 	struct adreno_platform_config *config = pdev->dev.platform_data;
+	const struct adreno_info *info = config->info;
 	struct device_node *node;
 	struct a6xx_gpu *a6xx_gpu;
 	struct adreno_gpu *adreno_gpu;
 	struct msm_gpu *gpu;
 	extern int enable_preemption;
+	u32 speedbin;
 	bool is_a7xx;
 	int ret, nr_rings = 1;
 
@@ -2619,14 +2641,14 @@ static struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 	adreno_gpu->gmu_is_wrapper = of_device_is_compatible(node, "qcom,adreno-gmu-wrapper");
 
 	adreno_gpu->base.hw_apriv =
-		!!(config->info->quirks & ADRENO_QUIRK_HAS_HW_APRIV);
+		!!(info->quirks & ADRENO_QUIRK_HAS_HW_APRIV);
 
 	/* gpu->info only gets assigned in adreno_gpu_init(). A8x is included intentionally */
-	is_a7xx = config->info->family >= ADRENO_7XX_GEN1;
+	is_a7xx = info->family >= ADRENO_7XX_GEN1;
 
 	a6xx_llc_slices_init(pdev, a6xx_gpu, is_a7xx);
 
-	ret = a6xx_set_supported_hw(&pdev->dev, config->info);
+	ret = a6xx_set_supported_hw(&pdev->dev, a6xx_gpu, info);
 	if (ret) {
 		a6xx_llc_slices_destroy(a6xx_gpu);
 		kfree(a6xx_gpu);
@@ -2634,15 +2656,20 @@ static struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 	}
 
 	if ((enable_preemption == 1) || (enable_preemption == -1 &&
-	    (config->info->quirks & ADRENO_QUIRK_PREEMPTION)))
+	    (info->quirks & ADRENO_QUIRK_PREEMPTION)))
 		nr_rings = 4;
 
-	ret = adreno_gpu_init(dev, pdev, adreno_gpu, config->info->funcs, nr_rings);
+	ret = adreno_gpu_init(dev, pdev, adreno_gpu, info->funcs, nr_rings);
 	if (ret) {
 		a6xx_destroy(&(a6xx_gpu->base.base));
 		return ERR_PTR(ret);
 	}
 
+	/* Set the speedbin value that is passed to userspace */
+	if (a6xx_read_speedbin(&pdev->dev, a6xx_gpu, info, &speedbin) || !speedbin)
+		speedbin = 0xffff;
+	adreno_gpu->speedbin = (uint16_t) (0xffff & speedbin);
+
 	/*
 	 * For now only clamp to idle freq for devices where this is known not
 	 * to cause power supply issues:
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index 10d9e5f40640..826661cb7988 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -1184,7 +1184,6 @@ 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;
@@ -1213,10 +1212,6 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 			devm_pm_opp_set_clkname(dev, "core");
 	}
 
-	if (adreno_read_speedbin(dev, &speedbin) || !speedbin)
-		speedbin = 0xffff;
-	adreno_gpu->speedbin = (uint16_t) (0xffff & speedbin);
-
 	gpu_name = devm_kasprintf(dev, GFP_KERNEL, "%"ADRENO_CHIPID_FMT,
 			ADRENO_CHIPID_ARGS(config->chip_id));
 	if (!gpu_name)
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
index 29097e6b4253..044ed4d49aa7 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
@@ -63,6 +63,7 @@ enum adreno_family {
 #define ADRENO_QUIRK_PREEMPTION			BIT(5)
 #define ADRENO_QUIRK_4GB_VA			BIT(6)
 #define ADRENO_QUIRK_IFPC			BIT(7)
+#define ADRENO_QUIRK_SOFTFUSE			BIT(8)
 
 /* Helper for formating the chip_id in the way that userspace tools like
  * crashdec expect.
diff --git a/drivers/gpu/drm/msm/registers/adreno/a6xx.xml b/drivers/gpu/drm/msm/registers/adreno/a6xx.xml
index 3941e7510754..2309870f5031 100644
--- a/drivers/gpu/drm/msm/registers/adreno/a6xx.xml
+++ b/drivers/gpu/drm/msm/registers/adreno/a6xx.xml
@@ -5016,6 +5016,10 @@ by a particular renderpass/blit.
 		<bitfield pos="1" name="LPAC" type="boolean"/>
 		<bitfield pos="2" name="RAYTRACING" type="boolean"/>
 	</reg32>
+	<reg32 offset="0x0405" name="CX_MISC_SW_FUSE_FREQ_LIMIT_STATUS" variants="A8XX-">
+		<bitfield high="8" low="0" name="FINALFREQLIMIT"/>
+		<bitfield pos="24" name="SOFTSKUDISABLED" type="boolean"/>
+	</reg32>
 </domain>
 
 </database>

-- 
2.51.0