drm/rockchip: Drop ROCKCHIP_IOMMU depend for DRM_ROCKCHIP

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
with an 'optional-dependency'.

Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>
[added reference to optional-dependies description]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20251106020632.92-9-kernel@airkyi.com

diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig
index 6f068ce1021d344e7ec6ff006592356f69b0ad9a..025bd770f499e6edc5a30a53c6ef54dcc174b836 100644 (file)
--- 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