linux-kernel - [PATCH v3 11/14] media: imx: vdic: rely on VDIC for correct field order

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Message-Id: <1533150747-30677-12-git-send-email-steve_longerbeam@mentor.com>
Date:   Wed,  1 Aug 2018 12:12:24 -0700
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     linux-media@...r.kernel.org
Cc:     Steve Longerbeam <steve_longerbeam@...tor.com>,
        Steve Longerbeam <slongerbeam@...il.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org (open list:STAGING SUBSYSTEM),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 11/14] media: imx: vdic: rely on VDIC for correct field order

prepare_vdi_in_buffers() was setting up the dma pointers as if the
VDIC is always programmed to receive the fields in bottom-top order,
i.e. as if ipu_vdi_set_field_order() only programs BT order in the VDIC.
But that's not true, ipu_vdi_set_field_order() is working correctly.

So fix prepare_vdi_in_buffers() to give the VDIC the fields in whatever
order they were received by the video source, and rely on the VDIC to
sort out which is top and which is bottom.

Signed-off-by: Steve Longerbeam <steve_longerbeam@...tor.com>
---
 drivers/staging/media/imx/imx-media-vdic.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/staging/media/imx/imx-media-vdic.c b/drivers/staging/media/imx/imx-media-vdic.c
index 482250d..4a89071 100644
--- a/drivers/staging/media/imx/imx-media-vdic.c
+++ b/drivers/staging/media/imx/imx-media-vdic.c
@@ -219,26 +219,18 @@ static void __maybe_unused prepare_vdi_in_buffers(struct vdic_priv *priv,
 
 	switch (priv->fieldtype) {
 	case V4L2_FIELD_SEQ_TB:
-		prev_phys = vb2_dma_contig_plane_dma_addr(prev_vb, 0);
-		curr_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0) + fs;
-		next_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0);
-		break;
 	case V4L2_FIELD_SEQ_BT:
 		prev_phys = vb2_dma_contig_plane_dma_addr(prev_vb, 0) + fs;
 		curr_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0);
 		next_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0) + fs;
 		break;
+	case V4L2_FIELD_INTERLACED_TB:
 	case V4L2_FIELD_INTERLACED_BT:
+	case V4L2_FIELD_INTERLACED:
 		prev_phys = vb2_dma_contig_plane_dma_addr(prev_vb, 0) + is;
 		curr_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0);
 		next_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0) + is;
 		break;
-	default:
-		/* assume V4L2_FIELD_INTERLACED_TB */
-		prev_phys = vb2_dma_contig_plane_dma_addr(prev_vb, 0);
-		curr_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0) + is;
-		next_phys = vb2_dma_contig_plane_dma_addr(curr_vb, 0);
-		break;
 	}
 
 	ipu_cpmem_set_buffer(priv->vdi_in_ch_p, 0, prev_phys);
-- 
2.7.4