On Thu, Jun 28, 2018 at 04:54:56PM +0300, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> All the plane->fb/old_fb/crtc dance of __setplane_internal() is
> pointless on atomic drivers. So let's just introduce a simpler
> version that skips all that.
>
> Ideally we could also skip the __setplane_check() as
> drm_atomic_plane_check() already checks for everything, but the
> legacy cursor/"async" .update_plane() tricks bypass that so
> we still need to call __setplane_check(). Toss in a FIXME to
> remind someone to clean this up later.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_plane.c | 68 +++++++++++++++++++++++++++++++++++++--------
> 1 file changed, 57 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> index 5c97a0131484..58702340808c 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -649,6 +649,8 @@ static int __setplane_internal(struct drm_plane *plane,
> {
> int ret = 0;
>
> + WARN_ON(plane->state);
> +
> /* No fb means shut it down */
> if (!fb) {
> plane->old_fb = plane->fb;
> @@ -673,11 +675,9 @@ static int __setplane_internal(struct drm_plane *plane,
> crtc_x, crtc_y, crtc_w, crtc_h,
> src_x, src_y, src_w, src_h, ctx);
> if (!ret) {
> - if (!plane->state) {
> - plane->crtc = crtc;
> - plane->fb = fb;
> - drm_framebuffer_get(plane->fb);
> - }
> + plane->crtc = crtc;
> + plane->fb = fb;
> + drm_framebuffer_get(plane->fb);
> } else {
> plane->old_fb = NULL;
> }
> @@ -690,6 +690,41 @@ static int __setplane_internal(struct drm_plane *plane,
> return ret;
> }
>
> +static int __setplane_atomic(struct drm_plane *plane,
> + struct drm_crtc *crtc,
> + struct drm_framebuffer *fb,
> + int32_t crtc_x, int32_t crtc_y,
> + uint32_t crtc_w, uint32_t crtc_h,
> + uint32_t src_x, uint32_t src_y,
> + uint32_t src_w, uint32_t src_h,
> + struct drm_modeset_acquire_ctx *ctx)
> +{
> + int ret;
> +
> + WARN_ON(!plane->state);
> +
> + /* No fb means shut it down */
> + if (!fb)
> + return plane->funcs->disable_plane(plane, ctx);
> +
> + /*
> + * FIXME: This is redundant with drm_atomic_plane_check(),
> + * but the legacy cursor/"async" .update_plane() tricks
> + * don't call that so we still need this here. Should remove
> + * this when all .update_plane() implementations have been
> + * fixed to call drm_atomic_plane_check().
> + */
> + ret = __setplane_check(plane, crtc, fb,
> + crtc_x, crtc_y, crtc_w, crtc_h,
> + src_x, src_y, src_w, src_h);
> + if (ret)
> + return ret;
> +
> + return plane->funcs->update_plane(plane, crtc, fb,
> + crtc_x, crtc_y, crtc_w, crtc_h,
> + src_x, src_y, src_w, src_h, ctx);
> +}
> +
> static int setplane_internal(struct drm_plane *plane,
> struct drm_crtc *crtc,
> struct drm_framebuffer *fb,
> @@ -707,9 +742,15 @@ static int setplane_internal(struct drm_plane *plane,
> ret = drm_modeset_lock_all_ctx(plane->dev, &ctx);
> if (ret)
> goto fail;
> - ret = __setplane_internal(plane, crtc, fb,
> - crtc_x, crtc_y, crtc_w, crtc_h,
> - src_x, src_y, src_w, src_h, &ctx);
> +
> + if (plane->state)
We're not 100% consistent, but I think this here will make life harder for
drivers transitioning to atomic. Not many left, but still some.
Please use drm_drv_uses_atomic_modeset() instead and check instead for
DRIVER_ATOMIC in your WARN_ON in all the places you're checking for
->state in this patch and the next one.
With that fixed, on the series:
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> + ret = __setplane_atomic(plane, crtc, fb,
> + crtc_x, crtc_y, crtc_w, crtc_h,
> + src_x, src_y, src_w, src_h, &ctx);
> + else
> + ret = __setplane_internal(plane, crtc, fb,
> + crtc_x, crtc_y, crtc_w, crtc_h,
> + src_x, src_y, src_w, src_h, &ctx);
>
> fail:
> if (ret == -EDEADLK) {
> @@ -841,9 +882,14 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc,
> src_h = fb->height << 16;
> }
>
> - ret = __setplane_internal(plane, crtc, fb,
> - crtc_x, crtc_y, crtc_w, crtc_h,
> - 0, 0, src_w, src_h, ctx);
> + if (plane->state)
> + ret = __setplane_atomic(plane, crtc, fb,
> + crtc_x, crtc_y, crtc_w, crtc_h,
> + 0, 0, src_w, src_h, ctx);
> + else
> + ret = __setplane_internal(plane, crtc, fb,
> + crtc_x, crtc_y, crtc_w, crtc_h,
> + 0, 0, src_w, src_h, ctx);
>
> if (fb)
> drm_framebuffer_put(fb);
> --
> 2.16.4
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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