diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/tegra/dc.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 3a8a7c227051..5bab53e0f990 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -435,6 +435,19 @@ static const struct drm_plane_funcs tegra_primary_plane_funcs = { static struct drm_plane *tegra_dc_primary_plane_create(struct drm_device *drm, struct tegra_dc *dc) { + /* + * Ideally this would use drm_crtc_mask(), but that would require the + * CRTC to already be in the mode_config's list of CRTCs. However, it + * will only be added to that list in the drm_crtc_init_with_planes() + * (in tegra_dc_init()), which in turn requires registration of these + * planes. So we have ourselves a nice little chicken and egg problem + * here. + * + * We work around this by manually creating the mask from the number + * of CRTCs that have been registered, and should therefore always be + * the same as drm_crtc_index() after registration. + */ + unsigned long possible_crtcs = 1 << drm->mode_config.num_crtc; struct tegra_plane *plane; unsigned int num_formats; const u32 *formats; @@ -447,7 +460,7 @@ static struct drm_plane *tegra_dc_primary_plane_create(struct drm_device *drm, num_formats = ARRAY_SIZE(tegra_primary_plane_formats); formats = tegra_primary_plane_formats; - err = drm_universal_plane_init(drm, &plane->base, 1 << dc->pipe, + err = drm_universal_plane_init(drm, &plane->base, possible_crtcs, &tegra_primary_plane_funcs, formats, num_formats, DRM_PLANE_TYPE_PRIMARY); if (err < 0) { |