drm: mali-dp: Add writeback connector
Mali-DP has a memory writeback engine which can be used to write the
composition result to a memory buffer. Expose this functionality as a
DRM writeback connector on supported hardware.
Changes since v1:
Daniel Vetter:
- Don't require a modeset when writeback routing changes
- Make writeback connector always disconnected
Changes since v2:
- Rebase onto new drm_writeback_connector
- Add reset callback, allocating subclassed state
Daniel Vetter:
- Squash out-fence support into this commit
Gustavo Padovan:
- Don't signal fence directly from driver (and drop malidp_mw_job)
Changes since v3:
- Modifications to fit with Mali-DP commit tail changes
Signed-off-by: Brian Starkey <brian.starkey@arm.com>
[rebased and fixed conflicts]
Signed-off-by: Mihail Atanassov <mihail.atanassov@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 1788423..965be21 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1436,6 +1436,10 @@ static void drm_atomic_connector_print_state(struct drm_printer *p,
drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name);
drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)");
+ if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)
+ if (state->writeback_job && state->writeback_job->fb)
+ drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id);
+
if (connector->funcs->atomic_print_state)
connector->funcs->atomic_print_state(p, state);
}