On Wed, Nov 11, 2015 at 11:29:11AM +0100, Maarten Lankhorst wrote:
> From: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Needs "Don't touch plane->old_fb/fb without having the right locks held."
like the previous patch in the commit message. With that for patches 4&5:
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> ---
> drivers/gpu/drm/drm_fb_helper.c | 30 ++++++++----------------------
> 1 file changed, 8 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index abd50863506e..69cbab5e5c81 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -1227,7 +1227,9 @@ static int pan_display_atomic(struct fb_var_screeninfo *var,
> struct drm_fb_helper *fb_helper = info->par;
> struct drm_device *dev = fb_helper->dev;
> struct drm_atomic_state *state;
> + struct drm_plane *plane;
> int i, ret;
> + unsigned plane_mask;
>
> state = drm_atomic_state_alloc(dev);
> if (!state)
> @@ -1235,19 +1237,22 @@ static int pan_display_atomic(struct fb_var_screeninfo *var,
>
> state->acquire_ctx = dev->mode_config.acquire_ctx;
> retry:
> + plane_mask = 0;
> for(i = 0; i < fb_helper->crtc_count; i++) {
> struct drm_mode_set *mode_set;
>
> mode_set = &fb_helper->crtc_info[i].mode_set;
>
> - mode_set->crtc->primary->old_fb = mode_set->crtc->primary->fb;
> -
> mode_set->x = var->xoffset;
> mode_set->y = var->yoffset;
>
> ret = __drm_atomic_helper_set_config(mode_set, state);
> if (ret != 0)
> goto fail;
> +
> + plane = mode_set->crtc->primary;
> + plane_mask |= drm_plane_index(plane);
> + plane->old_fb = plane->fb;
> }
>
> ret = drm_atomic_commit(state);
> @@ -1259,26 +1264,7 @@ retry:
>
>
> fail:
> - for(i = 0; i < fb_helper->crtc_count; i++) {
> - struct drm_mode_set *mode_set;
> - struct drm_plane *plane;
> -
> - mode_set = &fb_helper->crtc_info[i].mode_set;
> - plane = mode_set->crtc->primary;
> -
> - if (ret == 0) {
> - struct drm_framebuffer *new_fb = plane->state->fb;
> -
> - if (new_fb)
> - drm_framebuffer_reference(new_fb);
> - plane->fb = new_fb;
> - plane->crtc = plane->state->crtc;
> -
> - if (plane->old_fb)
> - drm_framebuffer_unreference(plane->old_fb);
> - }
> - plane->old_fb = NULL;
> - }
> + drm_atomic_clean_old_fb(dev, plane_mask, ret);
>
> if (ret == -EDEADLK)
> goto backoff;
> --
> 2.1.0
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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