Re: [RESEND PATCH v1] drm: Clean up drm Makefile

[Daniel Vetter <daniel@ffwll.ch>]

On Sat, Jan 30, 2016 at 01:11:01PM +0200, Oded Gabbay wrote:
> On Sat, Jan 30, 2016 at 11:56 AM, Xinliang Liu <xinliang.liu@linaro.org> wrote:
> > This patch cleans up the Makefile of drm root directory.
> > Make core and device drivers configuration list sorted Alphabetically.
> >
> > Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
> > Reviewed-by: Xinwei Kong <kong.kongxinwei@hisilicon.com>
> > Reviewed-by: Yifan Liu <liu_fanyi@163.com>
> > ---
> >  drivers/gpu/drm/Makefile | 102 ++++++++++++++++++++++++-----------------------
> >  1 file changed, 52 insertions(+), 50 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> > index 61766dec6a8d..77000717305b 100644
> > --- a/drivers/gpu/drm/Makefile
> > +++ b/drivers/gpu/drm/Makefile
> > @@ -2,6 +2,9 @@
> >  # Makefile for the drm device driver.  This driver provides support for the
> >  # Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
> >
> > +CFLAGS_drm_trace_points.o := -I$(src)
> > +
> > +# core. Please keep this list sorted alphabetically
> >  drm-y       := drm_auth.o drm_bufs.o drm_cache.o \
> >                 drm_context.o drm_dma.o \
> >                 drm_fops.o drm_gem.o drm_ioctl.o drm_irq.o \
> > @@ -13,64 +16,63 @@ drm-y       :=      drm_auth.o drm_bufs.o drm_cache.o \
> >                 drm_trace_points.o drm_global.o drm_prime.o \
> >                 drm_rect.o drm_vma_manager.o drm_flip_work.o \
> >                 drm_modeset_lock.o drm_atomic.o drm_bridge.o
> > -
> > -drm-$(CONFIG_COMPAT) += drm_ioc32.o
> > -drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
> >  drm-$(CONFIG_PCI) += ati_pcigart.o
> > -drm-$(CONFIG_DRM_PANEL) += drm_panel.o
> > -drm-$(CONFIG_OF) += drm_of.o
> >  drm-$(CONFIG_AGP) += drm_agpsupport.o
> > +drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
> > +drm-$(CONFIG_COMPAT) += drm_ioc32.o
> > +drm-$(CONFIG_OF) += drm_of.o
> > +drm-$(CONFIG_DRM_PANEL) += drm_panel.o
> > +obj-$(CONFIG_DRM)      += drm.o
> > +
> > +obj-$(CONFIG_DRM_MIPI_DSI) += drm_mipi_dsi.o
> >
> >  drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o drm_probe_helper.o \
> >                 drm_plane_helper.o drm_dp_mst_topology.o drm_atomic_helper.o
> >  drm_kms_helper-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o
> > -drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o
> >  drm_kms_helper-$(CONFIG_DRM_KMS_CMA_HELPER) += drm_fb_cma_helper.o
> > -
> > +drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o
> >  obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
> >
> > -CFLAGS_drm_trace_points.o := -I$(src)
> > +obj-$(CONFIG_DRM_TTM) += ttm/
> >
> > -obj-$(CONFIG_DRM)      += drm.o
> > -obj-$(CONFIG_DRM_MIPI_DSI) += drm_mipi_dsi.o
> > -obj-$(CONFIG_DRM_TTM)  += ttm/
> > -obj-$(CONFIG_DRM_TDFX) += tdfx/
> > -obj-$(CONFIG_DRM_R128) += r128/
> > -obj-$(CONFIG_HSA_AMD) += amd/amdkfd/
> > -obj-$(CONFIG_DRM_RADEON)+= radeon/
> > -obj-$(CONFIG_DRM_AMDGPU)+= amd/amdgpu/
> > -obj-$(CONFIG_DRM_MGA)  += mga/
> > -obj-$(CONFIG_DRM_I810) += i810/
> > -obj-$(CONFIG_DRM_I915)  += i915/
> > -obj-$(CONFIG_DRM_MGAG200) += mgag200/
> > -obj-$(CONFIG_DRM_VC4)  += vc4/
> > -obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus/
> > -obj-$(CONFIG_DRM_SIS)   += sis/
> > -obj-$(CONFIG_DRM_SAVAGE)+= savage/
> > -obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
> > -obj-$(CONFIG_DRM_VIA)  +=via/
> > -obj-$(CONFIG_DRM_VGEM) += vgem/
> > -obj-$(CONFIG_DRM_NOUVEAU) +=nouveau/
> > -obj-$(CONFIG_DRM_EXYNOS) +=exynos/
> > -obj-$(CONFIG_DRM_ROCKCHIP) +=rockchip/
> > -obj-$(CONFIG_DRM_GMA500) += gma500/
> > -obj-$(CONFIG_DRM_UDL) += udl/
> > -obj-$(CONFIG_DRM_AST) += ast/
> > -obj-$(CONFIG_DRM_ARMADA) += armada/
> > +# device drivers. Please keep this list sorted alphabetically
> > +obj-$(CONFIG_DRM_AMDGPU)       += amd/amdgpu/
> > +obj-$(CONFIG_HSA_AMD)          += amd/amdkfd/
> > +obj-$(CONFIG_DRM_ARMADA)       += armada/
> > +obj-$(CONFIG_DRM_AST)          += ast/
> >  obj-$(CONFIG_DRM_ATMEL_HLCDC)  += atmel-hlcdc/
> > -obj-$(CONFIG_DRM_RCAR_DU) += rcar-du/
> > -obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
> > -obj-y                  += omapdrm/
> > -obj-y                  += tilcdc/
> > -obj-$(CONFIG_DRM_QXL) += qxl/
> > -obj-$(CONFIG_DRM_BOCHS) += bochs/
> > -obj-$(CONFIG_DRM_VIRTIO_GPU) += virtio/
> > -obj-$(CONFIG_DRM_MSM) += msm/
> > -obj-$(CONFIG_DRM_TEGRA) += tegra/
> > -obj-$(CONFIG_DRM_STI) += sti/
> > -obj-$(CONFIG_DRM_IMX) += imx/
> > -obj-y                  += i2c/
> > -obj-y                  += panel/
> > -obj-y                  += bridge/
> > -obj-$(CONFIG_DRM_FSL_DCU) += fsl-dcu/
> > -obj-$(CONFIG_DRM_ETNAVIV) += etnaviv/
> > +obj-$(CONFIG_DRM_BOCHS)                += bochs/
> > +obj-y                          += bridge/
> > +obj-$(CONFIG_DRM_CIRRUS_QEMU)  += cirrus/
> > +obj-$(CONFIG_DRM_ETNAVIV)      += etnaviv/
> > +obj-$(CONFIG_DRM_EXYNOS)       += exynos/
> > +obj-$(CONFIG_DRM_FSL_DCU)      += fsl-dcu/
> > +obj-$(CONFIG_DRM_GMA500)       += gma500/
> > +obj-y                          += i2c/
> > +obj-$(CONFIG_DRM_I810)         += i810/
> > +obj-$(CONFIG_DRM_I915)         += i915/
> > +obj-$(CONFIG_DRM_IMX)          += imx/
> > +obj-$(CONFIG_DRM_MGA)          += mga/
> > +obj-$(CONFIG_DRM_MGAG200)      += mgag200/
> > +obj-$(CONFIG_DRM_MSM)          += msm/
> > +obj-$(CONFIG_DRM_NOUVEAU)      += nouveau/
> > +obj-y                          += omapdrm/
> > +obj-y                          += panel/
> > +obj-$(CONFIG_DRM_QXL)          += qxl/
> > +obj-$(CONFIG_DRM_R128)         += r128/
> > +obj-$(CONFIG_DRM_RADEON)       += radeon/
> > +obj-$(CONFIG_DRM_RCAR_DU)      += rcar-du/
> > +obj-$(CONFIG_DRM_ROCKCHIP)     += rockchip/
> > +obj-$(CONFIG_DRM_SAVAGE)       += savage/
> > +obj-$(CONFIG_DRM_SHMOBILE)     += shmobile/
> > +obj-$(CONFIG_DRM_SIS)          += sis/
> > +obj-$(CONFIG_DRM_STI)          += sti/
> > +obj-$(CONFIG_DRM_TDFX)         += tdfx/
> > +obj-$(CONFIG_DRM_TEGRA)                += tegra/
> > +obj-y                          += tilcdc/
> > +obj-$(CONFIG_DRM_UDL)          += udl/
> > +obj-$(CONFIG_DRM_VC4)          += vc4/
> > +obj-$(CONFIG_DRM_VGEM)         += vgem/
> > +obj-$(CONFIG_DRM_VIA)          += via/
> > +obj-$(CONFIG_DRM_VIRTIO_GPU)   += virtio/
> > +obj-$(CONFIG_DRM_VMWGFX)       += vmwgfx/
> > --
> > 1.9.1
> >
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> NACK, amdkfd *must* be before amdgpu *and* radeon, because it needs to
> be already loaded when amdgpu/radeon get loaded, and when all these
> drivers are compiled inside the kernel, the order is maintained by the
> linkage order in the makefile.

That's not how this is supposed to be done. If you have inter-driver
depencies like this you need to check for them, and defer the driver
loading by returngin -EPROBE_DEFER. The core kernel will then re-probe
your driver once other drivers have loaded. Handling inter-driver deps
using compile-ordering is seriously too fragile.

Please fix this up, thanks.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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