[PATCH] Revert "drm/exynos/decon5433: implement frame counter"

[Daniel Vetter]

On Fri, Oct 5, 2018 at 4:59 AM Inki Dae <inki.dae at samsung.com> wrote:
>
> This reverts commit 0586feba322e1de05075700eb4b835c8b683e62b
>
> This patch makes it to need get_vblank_counter callback in crtc
> to get frame counter from decon driver.
>
> However, drm_dev->max_vblank_count is a member unique to
> vendor's DRM driver but in case of ARM DRM, some CRTC devices
> don't provide the frame counter value. As a result, this patch
> made extension and clone mode not working.
>
> Instead of this patch, we may need separated max_vblank_count
> which belongs to each CRTC device, or need to implement frame
> counter emulation for them who don't support HW frame counter.

I think addin drm_crtc->max_vblank_count would make tons of sense,
we've moved a bunch of the other vblank things in there too in the
past. The logic in drm_vblank.c could be


-Daniel

>
> Signed-off-by: Inki Dae <inki.dae at samsung.com>
> ---
>  drivers/gpu/drm/exynos/exynos5433_drm_decon.c |  9 ---------
>  drivers/gpu/drm/exynos/exynos_drm_crtc.c      | 11 -----------
>  drivers/gpu/drm/exynos/exynos_drm_drv.h       |  1 -
>  3 files changed, 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> index 94529aa..aef487d 100644
> --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c
> @@ -164,13 +164,6 @@ static u32 decon_get_frame_count(struct decon_context *ctx, bool end)
>         return frm;
>  }
>
> -static u32 decon_get_vblank_counter(struct exynos_drm_crtc *crtc)
> -{
> -       struct decon_context *ctx = crtc->ctx;
> -
> -       return decon_get_frame_count(ctx, false);
> -}
> -
>  static void decon_setup_trigger(struct decon_context *ctx)
>  {
>         if (!ctx->crtc->i80_mode && !(ctx->out_type & I80_HW_TRG))
> @@ -536,7 +529,6 @@ static const struct exynos_drm_crtc_ops decon_crtc_ops = {
>         .disable                = decon_disable,
>         .enable_vblank          = decon_enable_vblank,
>         .disable_vblank         = decon_disable_vblank,
> -       .get_vblank_counter     = decon_get_vblank_counter,
>         .atomic_begin           = decon_atomic_begin,
>         .update_plane           = decon_update_plane,
>         .disable_plane          = decon_disable_plane,
> @@ -554,7 +546,6 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
>         int ret;
>
>         ctx->drm_dev = drm_dev;
> -       drm_dev->max_vblank_count = 0xffffffff;
>
>         for (win = ctx->first_win; win < WINDOWS_NR; win++) {
>                 ctx->configs[win].pixel_formats = decon_formats;
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> index eea9025..2696289 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
> @@ -162,16 +162,6 @@ static void exynos_drm_crtc_disable_vblank(struct drm_crtc *crtc)
>                 exynos_crtc->ops->disable_vblank(exynos_crtc);
>  }
>
> -static u32 exynos_drm_crtc_get_vblank_counter(struct drm_crtc *crtc)
> -{
> -       struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
> -
> -       if (exynos_crtc->ops->get_vblank_counter)
> -               return exynos_crtc->ops->get_vblank_counter(exynos_crtc);
> -
> -       return 0;
> -}
> -
>  static const struct drm_crtc_funcs exynos_crtc_funcs = {
>         .set_config     = drm_atomic_helper_set_config,
>         .page_flip      = drm_atomic_helper_page_flip,
> @@ -181,7 +171,6 @@ static const struct drm_crtc_funcs exynos_crtc_funcs = {
>         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
>         .enable_vblank = exynos_drm_crtc_enable_vblank,
>         .disable_vblank = exynos_drm_crtc_disable_vblank,
> -       .get_vblank_counter = exynos_drm_crtc_get_vblank_counter,
>  };
>
>  struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
> diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> index ec9604f..5e61e70 100644
> --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
> +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
> @@ -135,7 +135,6 @@ struct exynos_drm_crtc_ops {
>         void (*disable)(struct exynos_drm_crtc *crtc);
>         int (*enable_vblank)(struct exynos_drm_crtc *crtc);
>         void (*disable_vblank)(struct exynos_drm_crtc *crtc);
> -       u32 (*get_vblank_counter)(struct exynos_drm_crtc *crtc);
>         enum drm_mode_status (*mode_valid)(struct exynos_drm_crtc *crtc,
>                 const struct drm_display_mode *mode);
>         bool (*mode_fixup)(struct exynos_drm_crtc *crtc,
> --
> 2.7.4
>
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch