drm/sun4i: Use lists to track registered display backends and TCONs

To support multiple display pipelines, we need to keep track of the
multiple display backends and TCONs registered with the driver.

Switch to lists to track registered components. Components are only
appended to their respective lists if the bind process was successful.
The TCON bind function now defers if a backend was not registered.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index f636343..1bda4d1 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -17,6 +17,7 @@
 #include <drm/drm_crtc.h>
 
 #include <linux/kernel.h>
+#include <linux/list.h>
 #include <linux/reset.h>
 
 #define SUN4I_TCON_GCTL_REG			0x0
@@ -172,6 +173,9 @@ struct sun4i_tcon {
 
 	/* Associated crtc */
 	struct sun4i_crtc		*crtc;
+
+	/* TCON list management */
+	struct list_head		list;
 };
 
 struct drm_bridge *sun4i_tcon_find_bridge(struct device_node *node);