Re: [PATCH v5 1/2] drm/bridge: sil_sii8620: make remote control optional.
From: Andrzej Hajda
Date: Tue Apr 16 2019 - 01:55:42 EST
On 16.04.2019 01:24, Life is hard, and then you die wrote:
> Hi Andrzej,
> On Mon, Apr 15, 2019 at 10:58:09AM +0200, Andrzej Hajda wrote:
>> On 15.04.2019 10:12, Ronald TschalÃr wrote:
>>> commit d6abe6df706c (drm/bridge: sil_sii8620: do not have a dependency
>>> of RC_CORE) changed the driver to select both RC_CORE and INPUT.
>>> However, this causes problems with other drivers, in particular an input
>>> driver that depends on MFD_INTEL_LPSS_PCI (to be added in a separate
>>> drivers/clk/Kconfig:9:error: recursive dependency detected!
>>> drivers/clk/Kconfig:9: symbol COMMON_CLK is selected by MFD_INTEL_LPSS
>>> drivers/mfd/Kconfig:566: symbol MFD_INTEL_LPSS is selected by MFD_INTEL_LPSS_PCI
>>> drivers/mfd/Kconfig:580: symbol MFD_INTEL_LPSS_PCI is implied by KEYBOARD_APPLESPI
>>> drivers/input/keyboard/Kconfig:73: symbol KEYBOARD_APPLESPI depends on INPUT
>>> drivers/input/Kconfig:8: symbol INPUT is selected by DRM_SIL_SII8620
>>> drivers/gpu/drm/bridge/Kconfig:83: symbol DRM_SIL_SII8620 depends on DRM_BRIDGE
>>> drivers/gpu/drm/bridge/Kconfig:1: symbol DRM_BRIDGE is selected by DRM_PL111
>>> drivers/gpu/drm/pl111/Kconfig:1: symbol DRM_PL111 depends on COMMON_CLK
>>> According to the docs and general consensus, select should only be used
>>> for non user-visible symbols, but both RC_CORE and INPUT are
>>> user-visible. Furthermore almost all other references to INPUT
>>> throughout the kernel config are depends, not selects. For this reason
>>> the first part of this change reverts commit d6abe6df706c.
>>> In order to address the original reason for commit d6abe6df706c, namely
>>> that not all boards use the remote controller functionality and hence
>>> should not need have to deal with RC_CORE, the second part of this
>>> change now makes the remote control support in the driver optional and
>>> contingent on RC_CORE being defined. And with this the hard dependency
>>> on INPUT also goes away as that is only needed if RC_CORE is defined
>>> (which in turn already depends on INPUT).
>>> CC: Inki Dae <inki.dae@xxxxxxxxxxx>
>>> CC: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
>>> CC: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>>> CC: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
>>> Signed-off-by: Ronald TschalÃr <ronald@xxxxxxxxxxxxx>
>> Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
> Thanks for your reviews!
>> If there are no objections I will take it to drm-misc tomorrow.
> This brings us back to the discussion started in response to the first
> version of my patch (see
> To recap: the problem is that the applespi patch depends on this patch
> here, as make-config will break as described above otherwise. So if
> this patch is submitted through drm-misc, then it's unclear to me how
> to ensure that the two patches make it upstream in proper order,
> unless the applespi patch is also upstreamed through drm-misc, or the
> Kconfig for applespi is (temporarily) modified to not trigger the
> config error and another patch is later submitted to fix the Kconfig
> again (which seems somewhat ugly to me). Assuming that consensus is to
> merge both patches through one tree, then it would seem that because
> this patch here is relatively small that maybe it could be merged
> through the input tree along with the applespi patch?
Oh, I have forgot. Please take it then via input tree.