[PATCH v6 4/6] drm/panthor: Add support for Mali-Gx15 family of GPUs

[Karunika Choo <karunika.choo@arm.com>]

Mali-Gx15 introduces a new GPU_FEATURES register that provides
information about GPU-wide supported features. The register value will
be passed on to userspace via gpu_info.

Additionally, Mali-Gx15 presents an 'Immortalis' naming variant
depending on the shader core count and presence of Ray Intersection
feature support.

This patch adds:
- support for correctly identifying the model names for Mali-Gx15 GPUs.
- arch 11.8 FW binary support

Reviewed-by: Liviu Dudau <liviu.dudau@arm.com>
Signed-off-by: Karunika Choo <karunika.choo@arm.com>
---
 drivers/gpu/drm/panthor/panthor_fw.c   |  1 +
 drivers/gpu/drm/panthor/panthor_hw.c   | 15 +++++++++++++++
 drivers/gpu/drm/panthor/panthor_regs.h |  3 +++
 include/uapi/drm/panthor_drm.h         |  3 +++
 4 files changed, 22 insertions(+)

diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c
index b7b454d16f12..fa6e0b48a0b2 100644
--- a/drivers/gpu/drm/panthor/panthor_fw.c
+++ b/drivers/gpu/drm/panthor/panthor_fw.c
@@ -1404,3 +1404,4 @@ int panthor_fw_init(struct panthor_device *ptdev)
 MODULE_FIRMWARE("arm/mali/arch10.8/mali_csffw.bin");
 MODULE_FIRMWARE("arm/mali/arch10.10/mali_csffw.bin");
 MODULE_FIRMWARE("arm/mali/arch10.12/mali_csffw.bin");
+MODULE_FIRMWARE("arm/mali/arch11.8/mali_csffw.bin");
diff --git a/drivers/gpu/drm/panthor/panthor_hw.c b/drivers/gpu/drm/panthor/panthor_hw.c
index 7f138974d43b..a7583342d797 100644
--- a/drivers/gpu/drm/panthor/panthor_hw.c
+++ b/drivers/gpu/drm/panthor/panthor_hw.c
@@ -13,6 +13,9 @@ static char *get_gpu_model_name(struct panthor_device *ptdev)
 	const u32 gpu_id = ptdev->gpu_info.gpu_id;
 	const u32 product_id = GPU_PROD_ID_MAKE(GPU_ARCH_MAJOR(gpu_id),
 						GPU_PROD_MAJOR(gpu_id));
+	const bool ray_intersection = !!(ptdev->gpu_info.gpu_features &
+					 GPU_FEATURES_RAY_INTERSECTION);
+	const u8 shader_core_count = hweight64(ptdev->gpu_info.shader_present);
 
 	switch (product_id) {
 	case GPU_PROD_ID_MAKE(10, 2):
@@ -23,6 +26,15 @@ static char *get_gpu_model_name(struct panthor_device *ptdev)
 		return "Mali-G510";
 	case GPU_PROD_ID_MAKE(10, 4):
 		return "Mali-G310";
+	case GPU_PROD_ID_MAKE(11, 2):
+		if (shader_core_count > 10 && ray_intersection)
+			return "Mali-G715-Immortalis";
+		else if (shader_core_count >= 7)
+			return "Mali-G715";
+
+		fallthrough;
+	case GPU_PROD_ID_MAKE(11, 3):
+		return "Mali-G615";
 	}
 
 	return "(Unknown Mali GPU)";
@@ -53,6 +65,9 @@ static void panthor_gpu_info_init(struct panthor_device *ptdev)
 	ptdev->gpu_info.shader_present = gpu_read64(ptdev, GPU_SHADER_PRESENT);
 	ptdev->gpu_info.tiler_present = gpu_read64(ptdev, GPU_TILER_PRESENT);
 	ptdev->gpu_info.l2_present = gpu_read64(ptdev, GPU_L2_PRESENT);
+
+	/* Introduced in arch 11.x */
+	ptdev->gpu_info.gpu_features = gpu_read64(ptdev, GPU_FEATURES);
 }
 
 static void panthor_hw_info_init(struct panthor_device *ptdev)
diff --git a/drivers/gpu/drm/panthor/panthor_regs.h b/drivers/gpu/drm/panthor/panthor_regs.h
index 48bbfd40138c..8bee76d01bf8 100644
--- a/drivers/gpu/drm/panthor/panthor_regs.h
+++ b/drivers/gpu/drm/panthor/panthor_regs.h
@@ -70,6 +70,9 @@
 #define GPU_PWR_OVERRIDE0				0x54
 #define GPU_PWR_OVERRIDE1				0x58
 
+#define GPU_FEATURES					0x60
+#define   GPU_FEATURES_RAY_INTERSECTION			BIT(2)
+
 #define GPU_TIMESTAMP_OFFSET				0x88
 #define GPU_CYCLE_COUNT					0x90
 #define GPU_TIMESTAMP					0x98
diff --git a/include/uapi/drm/panthor_drm.h b/include/uapi/drm/panthor_drm.h
index e1f43deb7eca..467d365ed7ba 100644
--- a/include/uapi/drm/panthor_drm.h
+++ b/include/uapi/drm/panthor_drm.h
@@ -327,6 +327,9 @@ struct drm_panthor_gpu_info {
 
 	/** @pad: MBZ. */
 	__u32 pad;
+
+	/** @gpu_features: Bitmask describing supported GPU-wide features */
+	__u64 gpu_features;
 };
 
 /**
-- 
2.49.0