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media: v4l: vsp1: Fix header display list status check in continuous mode

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commit 613928e853 upstream.

To allow dual pipelines utilising two WPF entities when available, the
VSP was updated to support header-mode display list in continuous
pipelines.

A small bug in the status check of the command register causes the
second pipeline to be directly afflicted by the running of the first;
appearing as a perceived performance issue with stuttering display.

Fix the vsp1_dl_list_hw_update_pending() call to ensure that the read
comparison corresponds to the correct pipeline.

Fixes: eaf4bfad6a ("v4l: vsp1: Add support for header display lists in continuous mode")

Cc: "Stable v4.14+" <stable@vger.kernel.org>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kieran Bingham
2018-04-19 08:54:05 +02:00
committed by Greg Kroah-Hartman
parent 898df42767
commit 7561e2e376
1 changed files with 2 additions and 1 deletions
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drivers/media/platform/vsp1/vsp1_dl.c
+2 -1
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@@ -509,7 +509,8 @@ static bool vsp1_dl_list_hw_update_pending(struct vsp1_dl_manager *dlm)
return !!(vsp1_read(vsp1, VI6_DL_BODY_SIZE)
& VI6_DL_BODY_SIZE_UPD);
else
return !!(vsp1_read(vsp1, VI6_CMD(dlm->index) & VI6_CMD_UPDHDR));
return !!(vsp1_read(vsp1, VI6_CMD(dlm->index))
& VI6_CMD_UPDHDR);
}
static void vsp1_dl_list_hw_enqueue(struct vsp1_dl_list *dl)