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

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[ Upstream commit 5e3e4cb5e24b92773b194aa90066170b12133bc6 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Laurent Pinchart 2017-12-03 05:06:57 -05:00 committed by Greg Kroah-Hartman
parent d600eadf7d
commit 93c72937a2
1 changed files with 9 additions and 0 deletions
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9
drivers/media/platform/vsp1/vsp1_drm.c
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@ -504,6 +504,15 @@ 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;