diff options
| author | Boris Brezillon <boris.brezillon@collabora.com> | 2019-12-03 15:15:08 +0100 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@collabora.com> | 2019-12-09 10:03:01 +0100 |
| commit | 05193dc38197021894b17239fafbd2eb1afe5a45 (patch) | |
| tree | ae8656cacf3a21e180c0a9a920c3d661550032a3 /drivers/gpu/drm/exynos/exynos_drm_dsi.c | |
| parent | 35a61fe9218a9d32a93447bdcca1d0f167cd0433 (diff) | |
| download | linux-05193dc38197021894b17239fafbd2eb1afe5a45.tar.bz2 | |
drm/bridge: Make the bridge chain a double-linked list
So that each element in the chain can easily access its predecessor.
This will be needed to support bus format negotiation between elements
of the bridge chain.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191203141515.3597631-5-boris.brezillon@collabora.com
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_dsi.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_dsi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index d984097704b8..7de82e22252a 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -255,6 +255,7 @@ struct exynos_dsi { struct mipi_dsi_host dsi_host; struct drm_connector connector; struct drm_panel *panel; + struct list_head bridge_chain; struct drm_bridge *out_bridge; struct device *dev; @@ -1522,7 +1523,7 @@ static int exynos_dsi_host_attach(struct mipi_dsi_host *host, if (out_bridge) { drm_bridge_attach(encoder, out_bridge, NULL); dsi->out_bridge = out_bridge; - encoder->bridge = NULL; + list_splice(&encoder->bridge_chain, &dsi->bridge_chain); } else { int ret = exynos_dsi_create_connector(encoder); @@ -1588,6 +1589,7 @@ static int exynos_dsi_host_detach(struct mipi_dsi_host *host, if (dsi->out_bridge->funcs->detach) dsi->out_bridge->funcs->detach(dsi->out_bridge); dsi->out_bridge = NULL; + INIT_LIST_HEAD(&dsi->bridge_chain); } if (drm->mode_config.poll_enabled) @@ -1735,6 +1737,7 @@ static int exynos_dsi_probe(struct platform_device *pdev) init_completion(&dsi->completed); spin_lock_init(&dsi->transfer_lock); INIT_LIST_HEAD(&dsi->transfer_list); + INIT_LIST_HEAD(&dsi->bridge_chain); dsi->dsi_host.ops = &exynos_dsi_ops; dsi->dsi_host.dev = dev; |