Re: [PATCH 4/7] drm: Move the legacy kms disable_all helper to crtc helpers

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On Mon, Dec 10, 2018 at 5:04 AM Daniel Vetter <daniel.vetter@xxxxxxxx> wrote:
>
> It's not a core function, and the matching atomic functions are also
> not in the core. Plus the suspend/resume helper is also already there.
>
> Needs a tiny bit of open-coding, but less midlayer beats that I think.
>
> Cc: Sam Bobroff <sbobroff@xxxxxxxxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> Cc: Sean Paul <sean@xxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> Cc: "Christian König" <christian.koenig@xxxxxxx>
> Cc: "David (ChunMing) Zhou" <David1.Zhou@xxxxxxx>
> Cc: Rex Zhu <Rex.Zhu@xxxxxxx>
> Cc: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
> Cc: Huang Rui <ray.huang@xxxxxxx>
> Cc: Shaoyun Liu <Shaoyun.Liu@xxxxxxx>
> Cc: Monk Liu <Monk.Liu@xxxxxxx>
> Cc: nouveau@xxxxxxxxxxxxxxxxxxxxx
> Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  2 +-
>  drivers/gpu/drm/drm_crtc.c                 | 31 -------------------
>  drivers/gpu/drm/drm_crtc_helper.c          | 35 ++++++++++++++++++++++
>  drivers/gpu/drm/nouveau/nouveau_display.c  |  2 +-
>  drivers/gpu/drm/radeon/radeon_display.c    |  2 +-
>  include/drm/drm_crtc.h                     |  2 --
>  include/drm/drm_crtc_helper.h              |  1 +
>  7 files changed, 39 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index c75badfa5c4c..e669297ffefb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2689,7 +2689,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
>         amdgpu_irq_disable_all(adev);
>         if (adev->mode_info.mode_config_initialized){
>                 if (!amdgpu_device_has_dc_support(adev))
> -                       drm_crtc_force_disable_all(adev->ddev);
> +                       drm_helper_force_disable_all(adev->ddev);
>                 else
>                         drm_atomic_helper_shutdown(adev->ddev);
>         }
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index f660819d406e..7dabbaf033a1 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -104,37 +104,6 @@ int drm_crtc_force_disable(struct drm_crtc *crtc)
>         return drm_mode_set_config_internal(&set);
>  }
>
> -/**
> - * drm_crtc_force_disable_all - Forcibly turn off all enabled CRTCs
> - * @dev: DRM device whose CRTCs to turn off
> - *
> - * Drivers may want to call this on unload to ensure that all displays are
> - * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
> - *
> - * Note: This should only be used by non-atomic legacy drivers. For an atomic
> - * version look at drm_atomic_helper_shutdown().
> - *
> - * Returns:
> - * Zero on success, error code on failure.
> - */
> -int drm_crtc_force_disable_all(struct drm_device *dev)
> -{
> -       struct drm_crtc *crtc;
> -       int ret = 0;
> -
> -       drm_modeset_lock_all(dev);
> -       drm_for_each_crtc(crtc, dev)
> -               if (crtc->enabled) {
> -                       ret = drm_crtc_force_disable(crtc);
> -                       if (ret)
> -                               goto out;
> -               }
> -out:
> -       drm_modeset_unlock_all(dev);
> -       return ret;
> -}
> -EXPORT_SYMBOL(drm_crtc_force_disable_all);
> -
>  static unsigned int drm_num_crtcs(struct drm_device *dev)
>  {
>         unsigned int num = 0;
> diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
> index a3c81850e755..23159eb494f1 100644
> --- a/drivers/gpu/drm/drm_crtc_helper.c
> +++ b/drivers/gpu/drm/drm_crtc_helper.c
> @@ -984,3 +984,38 @@ void drm_helper_resume_force_mode(struct drm_device *dev)
>         drm_modeset_unlock_all(dev);
>  }
>  EXPORT_SYMBOL(drm_helper_resume_force_mode);
> +
> +/**
> + * drm_helper_force_disable_all - Forcibly turn off all enabled CRTCs
> + * @dev: DRM device whose CRTCs to turn off
> + *
> + * Drivers may want to call this on unload to ensure that all displays are
> + * unlit and the GPU is in a consistent, low power state. Takes modeset locks.
> + *
> + * Note: This should only be used by non-atomic legacy drivers. For an atomic
> + * version look at drm_atomic_helper_shutdown().
> + *
> + * Returns:
> + * Zero on success, error code on failure.
> + */
> +int drm_helper_force_disable_all(struct drm_device *dev)

Maybe put crtc somewhere in the function name so it's clear what we
are disabling.  With that fixed:
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>

> +{
> +       struct drm_crtc *crtc;
> +       int ret = 0;
> +
> +       drm_modeset_lock_all(dev);
> +       drm_for_each_crtc(crtc, dev)
> +               if (crtc->enabled) {
> +                       struct drm_mode_set set = {
> +                               .crtc = crtc,
> +                       };
> +
> +                       ret = drm_mode_set_config_internal(&set);
> +                       if (ret)
> +                               goto out;
> +               }
> +out:
> +       drm_modeset_unlock_all(dev);
> +       return ret;
> +}
> +EXPORT_SYMBOL(drm_helper_force_disable_all);
> diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
> index f326ffd86766..5d273a655479 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_display.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_display.c
> @@ -453,7 +453,7 @@ nouveau_display_fini(struct drm_device *dev, bool suspend, bool runtime)
>                 if (drm_drv_uses_atomic_modeset(dev))
>                         drm_atomic_helper_shutdown(dev);
>                 else
> -                       drm_crtc_force_disable_all(dev);
> +                       drm_helper_force_disable_all(dev);
>         }
>
>         /* disable flip completion events */
> diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
> index e6912eb99b42..92332226e5cf 100644
> --- a/drivers/gpu/drm/radeon/radeon_display.c
> +++ b/drivers/gpu/drm/radeon/radeon_display.c
> @@ -1643,7 +1643,7 @@ void radeon_modeset_fini(struct radeon_device *rdev)
>         if (rdev->mode_info.mode_config_initialized) {
>                 drm_kms_helper_poll_fini(rdev->ddev);
>                 radeon_hpd_fini(rdev);
> -               drm_crtc_force_disable_all(rdev->ddev);
> +               drm_helper_force_disable_all(rdev->ddev);
>                 radeon_fbdev_fini(rdev);
>                 radeon_afmt_fini(rdev);
>                 drm_mode_config_cleanup(rdev->ddev);
> diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> index b45bec0b7a9c..85abd3fe9e83 100644
> --- a/include/drm/drm_crtc.h
> +++ b/include/drm/drm_crtc.h
> @@ -1149,8 +1149,6 @@ static inline uint32_t drm_crtc_mask(const struct drm_crtc *crtc)
>         return 1 << drm_crtc_index(crtc);
>  }
>
> -int drm_crtc_force_disable_all(struct drm_device *dev);
> -
>  int drm_mode_set_config_internal(struct drm_mode_set *set);
>  struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx);
>
> diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h
> index d65f034843ce..0ee9a96b70da 100644
> --- a/include/drm/drm_crtc_helper.h
> +++ b/include/drm/drm_crtc_helper.h
> @@ -56,6 +56,7 @@ bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
>  int drm_helper_connector_dpms(struct drm_connector *connector, int mode);
>
>  void drm_helper_resume_force_mode(struct drm_device *dev);
> +int drm_helper_force_disable_all(struct drm_device *dev);
>
>  /* drm_probe_helper.c */
>  int drm_helper_probe_single_connector_modes(struct drm_connector
> --
> 2.20.0.rc1
>
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