Re: [PATCH] drm/msm/gpu: fix link failure with QCOM_SCM=m

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On Mon, Aug 2, 2021 at 4:53 PM Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
>
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> Another missed dependency when SCM is a loadable module
> and adreno is built-in:
>
> drivers/gpu/drm/msm/adreno/adreno_gpu.o: In function `adreno_zap_shader_load':
> adreno_gpu.c:(.text+0x1e8): undefined reference to `qcom_scm_is_available'
> drivers/gpu/drm/msm/adreno/a5xx_gpu.o: In function `a5xx_hw_init':
> a5xx_gpu.c:(.text+0x28a6): undefined reference to `qcom_scm_set_remote_state'
>
> Change it so the dependency on QCOM_SCM and QCOM_MDT_LOADER can be
> ignored if we are not building for ARCH_QCOM, but prevent the
> link error during compile testing when SCM is a loadable module
> and ARCH_QCOM is disabled.
>
> Fixes: a9e2559c931d ("drm/msm/gpu: Move zap shader loading to adreno")
> Fixes: 5ea4dba68305 ("drm/msm/a6xx: add CONFIG_QCOM_LLCC dependency")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>

Oh, this is still wrong, for two reasons:

> ---
>  drivers/gpu/drm/msm/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig
> index 52536e7adb95..69fbfe4568b2 100644
> --- a/drivers/gpu/drm/msm/Kconfig
> +++ b/drivers/gpu/drm/msm/Kconfig
> @@ -9,14 +9,14 @@ config DRM_MSM
>         depends on QCOM_OCMEM || QCOM_OCMEM=n
>         depends on QCOM_LLCC || QCOM_LLCC=n
>         depends on QCOM_COMMAND_DB || QCOM_COMMAND_DB=n
> +       depends on QCOM_SCM || (QCOM_SCM=n && ARCH_QCOM=n)
> +       depends on QCOM_MDT_LOADER || ARCH_QCOM=n

* Only QCOM_SCM has become user-selectable, but QCOM_MDT_LOADER
   is still meant to only be selected by its users, so we cannot depend on it
   here

* There are two other drivers that have the broken 'select QCOM_SCM if
   ARCH_QCOM', we have to fix them all at once.

         Arnd



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