6.1-stable review patch. If anyone has any objections, please let me know.
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From: Dragan Simic dsimic@manjaro.org
commit 0c94f58cef319ad054fd909b3bf4b7d09c03e11c upstream.
Lima DRM driver uses devfreq to perform DVFS, while using simple_ondemand devfreq governor by default. This causes driver initialization to fail on boot when simple_ondemand governor isn't built into the kernel statically, as a result of the missing module dependency and, consequently, the required governor module not being included in the initial ramdisk. Thus, let's mark simple_ondemand governor as a softdep for Lima, to have its kernel module included in the initial ramdisk.
This is a rather longstanding issue that has forced distributions to build devfreq governors statically into their kernels, [1][2] or may have forced some users to introduce unnecessary workarounds.
Having simple_ondemand marked as a softdep for Lima may not resolve this issue for all Linux distributions. In particular, it will remain unresolved for the distributions whose utilities for the initial ramdisk generation do not handle the available softdep information [3] properly yet. However, some Linux distributions already handle softdeps properly while generating their initial ramdisks, [4] and this is a prerequisite step in the right direction for the distributions that don't handle them properly yet.
[1] https://gitlab.manjaro.org/manjaro-arm/packages/core/linux-pinephone/-/blob/... [2] https://gitlab.com/postmarketOS/pmaports/-/blob/7f64e287e7732c9eaa029653e73c... [3] https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git/commit/?id=49d8e0b... [4] https://github.com/archlinux/mkinitcpio/commit/97ac4d37aae084a050be512f6d8f4...
Cc: Philip Muller philm@manjaro.org Cc: Oliver Smith ollieparanoid@postmarketos.org Cc: Daniel Smith danct12@disroot.org Cc: stable@vger.kernel.org Fixes: 1996970773a3 ("drm/lima: Add optional devfreq and cooling device support") Signed-off-by: Dragan Simic dsimic@manjaro.org Signed-off-by: Qiang Yu yuq825@gmail.com Link: https://patchwork.freedesktop.org/patch/msgid/fdaf2e41bb6a0c5118ff9cc21f4f62... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/lima/lima_drv.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/lima/lima_drv.c +++ b/drivers/gpu/drm/lima/lima_drv.c @@ -489,3 +489,4 @@ module_platform_driver(lima_platform_dri MODULE_AUTHOR("Lima Project Developers"); MODULE_DESCRIPTION("Lima DRM Driver"); MODULE_LICENSE("GPL v2"); +MODULE_SOFTDEP("pre: governor_simpleondemand");