linux-kernel - [PATCH 1/5] drm/panfrost: Add job slot register defs for affinity

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Message-ID: <20250828023422.2404784-2-adrian.larumbe@collabora.com>
Date: Thu, 28 Aug 2025 03:34:04 +0100
From: Adrián Larumbe <adrian.larumbe@...labora.com>
To: linux-kernel@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org,
	Boris Brezillon <boris.brezillon@...labora.com>,
	kernel@...labora.com,
	Adrián Larumbe <adrian.larumbe@...labora.com>,
	Rob Herring <robh@...nel.org>,
	Steven Price <steven.price@....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>
Subject: [PATCH 1/5] drm/panfrost: Add job slot register defs for affinity

From: Boris Brezillon <boris.brezillon@...labora.com>

This will let us set the affinity (L2 caches and tiler units that can
process a job) in future commits.

Signed-off-by: Boris Brezillon <boris.brezillon@...labora.com>
Signed-off-by: Adrián Larumbe <adrian.larumbe@...labora.com>
---
 drivers/gpu/drm/panfrost/panfrost_regs.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/panfrost/panfrost_regs.h b/drivers/gpu/drm/panfrost/panfrost_regs.h
index 2b8f1617b836..a63cd65b344a 100644
--- a/drivers/gpu/drm/panfrost/panfrost_regs.h
+++ b/drivers/gpu/drm/panfrost/panfrost_regs.h
@@ -253,6 +253,7 @@
 #define JS_AFFINITY_NEXT_LO(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x50)
 #define JS_AFFINITY_NEXT_HI(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x54)
 #define JS_CONFIG_NEXT(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x58)
+#define JS_XAFFINITY_NEXT(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x5c)
 #define JS_COMMAND_NEXT(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x60)
 #define JS_FLUSH_ID_NEXT(n)		(JS_BASE + ((n) * JS_SLOT_STRIDE) + 0x70)
 
@@ -267,6 +268,11 @@
 #define JS_CONFIG_DISABLE_DESCRIPTOR_WR_BK	BIT(15)
 #define JS_CONFIG_THREAD_PRI(n)			((n) << 16)
 
+/* Possible values of JS_XAFFINITY and JS_XAFFINITY_NEXT registers */
+#define JS_XAFFINITY_ENABLE		BIT(0)
+#define JS_XAFFINITY_TILER_MASK(x)	(((u32)(x) & GENMASK(7, 0)) << 8)
+#define JS_XAFFINITY_L2_MASK(x)		(((u32)(x) & GENMASK(15, 0)) << 16)
+
 #define JS_COMMAND_NOP			0x00
 #define JS_COMMAND_START		0x01
 #define JS_COMMAND_SOFT_STOP		0x02	/* Gently stop processing a job chain */
-- 
2.50.0