drm/bridge/synopsys: dsi: add ability to have
From: Heiko Stuebner <heiko@...> Date: Mon, 4 Jun 2018 11:11:35 +0200
Commit-Message
With the regular means of adding the dsi-component in probe it creates a race condition with the panel probing, as the panel device only gets created after the dsi-bus got created. When the panel-driver is build as a module it currently fails hard as the panel cannot be probed directly: dw_mipi_dsi_bind() __dw_mipi_dsi_probe() creates dsi bus creates panel device triggers panel module load panel not probed (module not loaded or panel probe slow) drm_bridge_attach fails with -EINVAL due to empty panel_bridge Additionally the panel probing can run concurrently with dsi bringup making it possible that the panel can already be found but dsi-attach hasn't finished running. To solve that cleanly we may want to only create the component after the panel has finished probing, by calling component_add from the host-attach dsi callback. As that is specific to glue drivers, add a new struct for host_ops so that glue drivers can tell the bridge to call specific functions after the common host-attach and before the common host-detach run. Suggested-by: Andrzej Hajda <a.hajda@...> Reviewed-by: Andrzej Hajda <a.hajda@...> Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 15 +++++++++++++++ include/drm/bridge/dw_mipi_dsi.h | 8 ++++++++ 2 files changed, 23 insertions(+)
Statistics
- 23 lines added
- 0 lines removed