drm/sun4i: Drop hardcoded .possible_crtcs values from layers

To support multiple display pipelines, we would have multiple crtcs,
with one or more planes bound to them. Obviously having hardcoded
values for the drm_plane .possible_crtcs field is not going to work.

For primary and cursor planes, the value is set by
drm_crtc_init_with_planes. We just need to set it for overlay planes.

We also fix the value set for the RGB encoder, by referencing the
crtc set in sun4i_drv.

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

3 files changed, 13 insertions, 2 deletions

diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c
index 81dcd5eee003..9d6fd2f40cf4 100644
--- a/drivers/gpu/drm/sun4i/sun4i_crtc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
@@ -190,5 +190,14 @@ struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm)
         scrtc->crtc.port = of_graph_get_port_by_id(drv->tcon->dev->of_node,
                                                    1);
 
+        /* Set possible_crtcs to this crtc for overlay planes */
+        for (i = 0; scrtc->layers[i]; i++) {
+                uint32_t possible_crtcs = BIT(drm_crtc_index(&scrtc->crtc));
+                struct sun4i_layer *layer = scrtc->layers[i];
+
+                if (layer->plane.type == DRM_PLANE_TYPE_OVERLAY)
+                        layer->plane.possible_crtcs = possible_crtcs;
+        }
+
         return scrtc;
 }
diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.c b/drivers/gpu/drm/sun4i/sun4i_layer.c
index 9c0baee25fae..431e13362b62 100644
--- a/drivers/gpu/drm/sun4i/sun4i_layer.c
+++ b/drivers/gpu/drm/sun4i/sun4i_layer.c
@@ -114,7 +114,8 @@ static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
         if (!layer)
                 return ERR_PTR(-ENOMEM);
 
-        ret = drm_universal_plane_init(drm, &layer->plane, BIT(0),
+        /* possible crtcs are set later */
+        ret = drm_universal_plane_init(drm, &layer->plane, 0,
                                        &sun4i_backend_layer_funcs,
                                        plane->formats, plane->nformats,
                                        plane->type, NULL);
diff --git a/drivers/gpu/drm/sun4i/sun4i_rgb.c b/drivers/gpu/drm/sun4i/sun4i_rgb.c
index 757208f51731..c4865bf1b392 100644
--- a/drivers/gpu/drm/sun4i/sun4i_rgb.c
+++ b/drivers/gpu/drm/sun4i/sun4i_rgb.c
@@ -17,6 +17,7 @@
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_panel.h>
 
+#include "sun4i_crtc.h"
 #include "sun4i_drv.h"
 #include "sun4i_tcon.h"
 #include "sun4i_rgb.h"
@@ -238,7 +239,7 @@ int sun4i_rgb_init(struct drm_device *drm)
         }
 
         /* The RGB encoder can only work with the TCON channel 0 */
-        rgb->encoder.possible_crtcs = BIT(0);
+        rgb->encoder.possible_crtcs = BIT(drm_crtc_index(&tcon->crtc->crtc));
 
         if (!IS_ERR(tcon->panel)) {
                 drm_connector_helper_add(&rgb->connector,