Commit 5e3e4cb5 authored Dec 03, 2017 by Laurent Pinchart Committed by Mauro Carvalho Chehab Feb 26, 2018

media: v4l: vsp1: Fix display stalls when requesting too many inputs

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+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

parent ed3056f0

drivers/media/platform/vsp1/vsp1_drm.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -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;