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Subject: media: v4l: vsp1: Fix display stalls when requesting too many inputs
Author: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
Date: Sun Dec 3 05:06:57 2017 -0500
Make sure we don't accept more inputs than the hardware can handle. This
is a temporary fix to avoid display stall, we need to instead allocate
the BRU or BRS to display pipelines dynamically based on the number of
planes they each use.
Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+rene...@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
drivers/media/platform/vsp1/vsp1_drm.c | 9 +++++++++
1 file changed, 9 insertions(+)
---
diff --git a/drivers/media/platform/vsp1/vsp1_drm.c
b/drivers/media/platform/vsp1/vsp1_drm.c
index 7ce69f23f50a..ac85942162c1 100644
--- a/drivers/media/platform/vsp1/vsp1_drm.c
+++ b/drivers/media/platform/vsp1/vsp1_drm.c
@@ -530,6 +530,15 @@ void vsp1_du_atomic_flush(struct device *dev, unsigned int
pipe_index)
struct vsp1_rwpf *rpf = vsp1->rpf[i];
unsigned int j;
+ /*
+ * Make sure we don't accept more inputs than the hardware can
+ * handle. This is a temporary fix to avoid display stall, we
+ * need to instead allocate the BRU or BRS to display pipelines
+ * dynamically based on the number of planes they each use.
+ */
+ if (pipe->num_inputs >= pipe->bru->source_pad)
+ pipe->inputs[i] = NULL;
+
if (!pipe->inputs[i])
continue;
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