linux-kernel - [PATCH v2 2/4] drm/panthor: Add SHADER

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Message-Id: <20251210-panthor-tracepoints-v2-2-ace2e29bad0f@collabora.com>
Date: Wed, 10 Dec 2025 15:30:38 +0100
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: 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>, 
 Chia-I Wu <olvaffe@...il.com>, Karunika Choo <karunika.choo@....com>
Cc: kernel@...labora.com, linux-kernel@...r.kernel.org, 
 dri-devel@...ts.freedesktop.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH v2 2/4] drm/panthor: Add SHADER_PWRFEATURES register
 definition

Available starting with Mali v12, the SHADER_PWRFEATURES register is a
32-bit register that contains a single bit so far. This bit flag
indicates whether the RT cores should be powered up or not.

The name "SHADER_PWRFEATURES" (as opposed to "SHADER_POWER_FEATURES") is
taken directly from official hardware documentation.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
 drivers/gpu/drm/panthor/panthor_regs.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/panthor/panthor_regs.h b/drivers/gpu/drm/panthor/panthor_regs.h
index 08bf06c452d6..4c79cec8dc21 100644
--- a/drivers/gpu/drm/panthor/panthor_regs.h
+++ b/drivers/gpu/drm/panthor/panthor_regs.h
@@ -96,6 +96,8 @@
 #define L2_READY					0x160
 
 #define SHADER_PWRON					0x180
+#define SHADER_PWRFEATURES				0x188
+#define   SHADER_PWRFEATURES_RT				BIT(0)
 #define TILER_PWRON					0x190
 #define L2_PWRON					0x1A0
 

-- 
2.52.0