________________________________________ 发件人: Bruce Ashfield <bruce.ashfi...@gmail.com> 发送时间: 2020年12月23日 0:08 收件人: Zhang, Qiang 抄送: linux-yocto@lists.yoctoproject.org 主题: Re: Question on i915: adust helper to 'm'
On Tue, Dec 22, 2020 at 1:06 AM Zhang, Qiang <qiang.zh...@windriver.com> wrote: > > Hello Bruce > > about commit 27ad9c754f20bdc59d281e6bc7c9b2a96bbed0ee > There is warning here: > > > [NOTE]: 'CONFIG_DRM_KMS_HELPER' last val (m) and .config val (y) do not match > [INFO]: CONFIG_DRM_KMS_HELPER : y ## .config: 4070 > :configs/standard/intel-x86/features/i915/i915.cfg (m) > [INFO]: raw config text: > > config DRM_KMS_HELPER > tristate > depends on DRM && HAS_IOMEM > help > CRTC helpers for KMS drivers. > > Config 'DRM_KMS_HELPER' has the following Direct dependencies > (DRM_KMS_HELPER=y): > DRM(=y) && HAS_IOMEM(=y) > Parent dependencies are: > HAS_IOMEM [y] DRM [y] > [INFO]: config 'CONFIG_DRM_KMS_HELPER' was set, but it wasn't assignable, > check (parent) dependencies > > [INFO]: selection details for 'CONFIG_DRM_KMS_HELPER': > Symbols currently y-selecting this symbol: > - DRM_FBDEV_EMULATION > - DRM_VIRTIO_GPU > > Symbols currently m-selecting this symbol: > - DRM_RADEON > - DRM_NOUVEAU > - DRM_I915 > - DRM_MGAG200 > > > I find this will trigger Warning: > > Symbol: DRM_FBDEV_EMULATION [=y] > Type : bool > Selects: DRM_KMS_HELPER [=y] && DRM_KMS_FB_HELPER [=y] > >You need to override the settings for that in the relevant BSPs. > >I just sent another fix to the tools that won't always show the >warning, but the reality is that those settings are used by multiple >kernel types and we end up with different values based on BSPs >and the >kernel type. > >So to really silence the warning, we should set the value in the BSP, >since it knows the proper setting. That was always the design of the >base values -> BSP, we are only now finally getting the right >warnings >from the tools. > >Bruce Hello Bruce this warnning happend in intel-x86-64 bsp, DRM_FBDEV_EMULATION=y will select DRM_KMS_HELPER=y, and depend CONFIG_DRM=y and type is bool, I set CONFIG_DRM =m in x86-64 bsp, this DRM_KMS_HELPER warning, but trigger another warning about DRM_VIRTIO_GPU. I want to know what you suggest Qiang > Thanks > Qiang -- - Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end - "Use the force Harry" - Gandalf, Star Trek II
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