We don't want tile 0,0 to artificially constrain the size of the legacy
fbdev device. Instead when reducing fb_size to be the minimum of all
displays, only consider the rightmost and bottommost tiles.
Signed-off-by: Rob Clark <robdclark@xxxxxxxxx>
Tested-by: Hai Li <hali@xxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_fb_helper.c | 26 +++++++++++++++++++++++---
1 file changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index dca98a4..1a20db7 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1034,9 +1034,16 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
crtc_count = 0;
for (i = 0; i < fb_helper->crtc_count; i++) {
struct drm_display_mode *desired_mode;
- int x, y;
+ struct drm_mode_set *mode_set;
+ int x, y, j;
+ /* in case of tile group, are we the last tile vert or horiz?
+ * If no tile group you are always the last one both vertically
+ * and horizontally
+ */
+ bool lastv = true, lasth = true;
desired_mode = fb_helper->crtc_info[i].desired_mode;
+ mode_set = &fb_helper->crtc_info[i].mode_set;
if (!desired_mode)
continue;
@@ -1051,8 +1058,21 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width);
sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height);
- sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width);
- sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height);
+
+ for (j = 0; j < mode_set->num_connectors; j++) {
+ struct drm_connector *connector = mode_set->connectors[j];
+ if (connector->has_tile) {
+ lasth = (connector->tile_h_loc == (connector->num_h_tile - 1));
+ lastv = (connector->tile_v_loc == (connector->num_v_tile - 1));
+ /* cloning to multiple tiles is just crazy-talk, so: */
+ break;
+ }
+ }
+
+ if (lasth)
+ sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width);
+ if (lastv)
+ sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height);
}
if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
--
2.1.0
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