linux-kernel - [PATCH 8/9] drm/rockchip: Drop ROCKCHIP_IOMMU depend for DRM

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Message-Id: <20251106020632.92-9-kernel@airkyi.com>
Date: Thu,  6 Nov 2025 10:06:31 +0800
From: Chaoyi Chen <kernel@...kyi.com>
To: Neil Armstrong <neil.armstrong@...aro.org>,
	Jessica Zhang <jessica.zhang@....qualcomm.com>,
	David Airlie <airlied@...il.com>,
	Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sandy Huang <hjc@...k-chips.com>,
	Heiko Stübner <heiko@...ech.de>,
	Andy Yan <andy.yan@...k-chips.com>,
	Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>
Cc: dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-phy@...ts.infradead.org,
	Chaoyi Chen <chaoyi.chen@...k-chips.com>
Subject: [PATCH 8/9] drm/rockchip: Drop ROCKCHIP_IOMMU depend for DRM_ROCKCHIP

From: Chaoyi Chen <chaoyi.chen@...k-chips.com>

On the RK3506 platform, there is no iommu hardware. And even on
platform that have iommu hardware, it should be possible to use
VOP without enabling iommu. In this case, a contiguous memory
space like CMA should be used.

So this patch removes the dependency on ROCKCHIP_IOMMU.

Signed-off-by: Chaoyi Chen <chaoyi.chen@...k-chips.com>
---
 drivers/gpu/drm/rockchip/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index b7b025814e72..a056d419190c 100644
--- a/drivers/gpu/drm/rockchip/Kconfig
+++ b/drivers/gpu/drm/rockchip/Kconfig
@@ -1,7 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-only
 config DRM_ROCKCHIP
 	tristate "DRM Support for Rockchip"
-	depends on DRM && ROCKCHIP_IOMMU
+	depends on DRM
+	depends on ROCKCHIP_IOMMU || !ROCKCHIP_IOMMU
 	depends on OF
 	select DRM_CLIENT_SELECTION
 	select DRM_GEM_DMA_HELPER
-- 
2.51.1