linux-kernel - [PATCH v7 28/34] media: imx: csi: increase burst size for YUV formats

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Message-Id: <1495672189-29164-29-git-send-email-steve_longerbeam@mentor.com>
Date:   Wed, 24 May 2017 17:29:43 -0700
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     robh+dt@...nel.org, mark.rutland@....com, shawnguo@...nel.org,
        kernel@...gutronix.de, fabio.estevam@....com,
        linux@...linux.org.uk, mchehab@...nel.org, hverkuil@...all.nl,
        nick@...anahar.org, markus.heiser@...marIT.de,
        p.zabel@...gutronix.de, laurent.pinchart+renesas@...asonboard.com,
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        sudipm.mukherjee@...il.com, minghsiu.tsai@...iatek.com,
        tiffany.lin@...iatek.com, jean-christophe.trotin@...com,
        horms+renesas@...ge.net.au, niklas.soderlund+renesas@...natech.se,
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        andrew-ct.chen@...iatek.com, gregkh@...uxfoundation.org,
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Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        devel@...verdev.osuosl.org
Subject: [PATCH v7 28/34] media: imx: csi: increase burst size for YUV formats

From: Philipp Zabel <p.zabel@...gutronix.de>

The IDMAC supports burst sizes of up to 32 pixels for interleaved YUV
formats and up to 64 pixels for planar YUV formats.

Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
---
 drivers/staging/media/imx/imx-media-csi.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
index 7defe53..e26c025 100644
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -333,6 +333,23 @@ static int csi_idmac_setup_channel(struct csi_priv *priv)
 		passthrough = true;
 		passthrough_bits = 16;
 		break;
+	case V4L2_PIX_FMT_YUV420:
+	case V4L2_PIX_FMT_NV12:
+		burst_size = (image.pix.width & 0x3f) ?
+			     ((image.pix.width & 0x1f) ?
+			      ((image.pix.width & 0xf) ? 8 : 16) : 32) : 64;
+		passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&
+			       sensor_ep->bus.parallel.bus_width >= 16);
+		passthrough_bits = 16;
+		break;
+	case V4L2_PIX_FMT_YUYV:
+	case V4L2_PIX_FMT_UYVY:
+		burst_size = (image.pix.width & 0x1f) ?
+			     ((image.pix.width & 0xf) ? 8 : 16) : 32;
+		passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&
+			       sensor_ep->bus.parallel.bus_width >= 16);
+		passthrough_bits = 16;
+		break;
 	default:
 		burst_size = (image.pix.width & 0xf) ? 8 : 16;
 		passthrough = (sensor_ep->bus_type != V4L2_MBUS_CSI2 &&
-- 
2.7.4