linux-kernel - [PATCH v2 8/8] drm/panthor: Add support for Mali-G1 GPUs

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Message-ID: <20251024202117.3241292-9-karunika.choo@arm.com>
Date: Fri, 24 Oct 2025 21:21:17 +0100
From: Karunika Choo <karunika.choo@....com>
To: dri-devel@...ts.freedesktop.org
Cc: nd@....com,
	Boris Brezillon <boris.brezillon@...labora.com>,
	Steven Price <steven.price@....com>,
	Liviu Dudau <liviu.dudau@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 8/8] drm/panthor: Add support for Mali-G1 GPUs

Add support for Mali-G1 GPUs (CSF architecture v14), introducing a new
panthor_hw_arch_v14 entry with reset and L2 power management operations
via the PWR_CONTROL block.

Mali-G1 introduces a dedicated PWR_CONTROL block for managing resets and
power domains. panthor_gpu_info_init() is updated to use this block for
L2, tiler, and shader domain present register reads.

Signed-off-by: Karunika Choo <karunika.choo@....com>
---
v2:
 * Removed feature bits usage.
 * Check panthor_hw_has_pwr_ctrl() to read the correct *_PRESENT
   registers instead of reading reserved registers on newer GPUs.
---
 drivers/gpu/drm/panthor/panthor_fw.c |  1 +
 drivers/gpu/drm/panthor/panthor_hw.c | 35 ++++++++++++++++++++++++----
 2 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c
index 9ba10ab1d7c0..031d23166c18 100644
--- a/drivers/gpu/drm/panthor/panthor_fw.c
+++ b/drivers/gpu/drm/panthor/panthor_fw.c
@@ -1500,3 +1500,4 @@ MODULE_FIRMWARE("arm/mali/arch10.12/mali_csffw.bin");
 MODULE_FIRMWARE("arm/mali/arch11.8/mali_csffw.bin");
 MODULE_FIRMWARE("arm/mali/arch12.8/mali_csffw.bin");
 MODULE_FIRMWARE("arm/mali/arch13.8/mali_csffw.bin");
+MODULE_FIRMWARE("arm/mali/arch14.8/mali_csffw.bin");
diff --git a/drivers/gpu/drm/panthor/panthor_hw.c b/drivers/gpu/drm/panthor/panthor_hw.c
index 09aef34a6ce7..29c7a6e60300 100644
--- a/drivers/gpu/drm/panthor/panthor_hw.c
+++ b/drivers/gpu/drm/panthor/panthor_hw.c
@@ -3,6 +3,7 @@

 #include "panthor_device.h"
 #include "panthor_gpu.h"
+#include "panthor_pwr.h"
 #include "panthor_regs.h"

 #define GPU_PROD_ID_MAKE(arch_major, prod_major) \
@@ -28,12 +29,25 @@ static struct panthor_hw panthor_hw_arch_v10 = {
 	},
 };

+static struct panthor_hw panthor_hw_arch_v14 = {
+	.ops = {
+		.soft_reset = panthor_pwr_reset_soft,
+		.l2_power_off = panthor_pwr_l2_power_off,
+		.l2_power_on = panthor_pwr_l2_power_on,
+	},
+};
+
 static struct panthor_hw_entry panthor_hw_match[] = {
 	{
 		.arch_min = 10,
 		.arch_max = 13,
 		.hwdev = &panthor_hw_arch_v10,
 	},
+	{
+		.arch_min = 14,
+		.arch_max = 14,
+		.hwdev = &panthor_hw_arch_v14,
+	},
 };

 static char *get_gpu_model_name(struct panthor_device *ptdev)
@@ -81,6 +95,12 @@ static char *get_gpu_model_name(struct panthor_device *ptdev)
 		fallthrough;
 	case GPU_PROD_ID_MAKE(13, 1):
 		return "Mali-G625";
+	case GPU_PROD_ID_MAKE(14, 0):
+		return "Mali-G1-Ultra";
+	case GPU_PROD_ID_MAKE(14, 1):
+		return "Mali-G1-Premium";
+	case GPU_PROD_ID_MAKE(14, 3):
+		return "Mali-G1-Pro";
 	}

 	return "(Unknown Mali GPU)";
@@ -107,12 +127,19 @@ static void panthor_gpu_info_init(struct panthor_device *ptdev)

 	ptdev->gpu_info.as_present = gpu_read(ptdev, GPU_AS_PRESENT);

-	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);
+
+	if (panthor_hw_has_pwr_ctrl(ptdev)) {
+		/* Introduced in arch 14.x */
+		ptdev->gpu_info.l2_present = gpu_read64(ptdev, PWR_L2_PRESENT);
+		ptdev->gpu_info.tiler_present = gpu_read64(ptdev, PWR_TILER_PRESENT);
+		ptdev->gpu_info.shader_present = gpu_read64(ptdev, PWR_SHADER_PRESENT);
+	} else {
+		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);
+	}
 }

 static void panthor_hw_info_init(struct panthor_device *ptdev)
--
2.49.0