linux-kernel - [PATCH 06/14] media: sun6i-csi: Support feeding from the MIPI CSI-2 controller

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Date:   Fri, 23 Oct 2020 19:45:38 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-sunxi@...glegroups.com
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Yong Deng <yong.deng@...ewell.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Helen Koike <helen.koike@...labora.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Hans Verkuil <hverkuil@...all.nl>, kevin.lhopital@...mail.com,
        Kévin L'hôpital 
        <kevin.lhopital@...tlin.com>
Subject: [PATCH 06/14] media: sun6i-csi: Support feeding from the MIPI CSI-2 controller

The A31 CSI controller supports MIPI CSI-2, through a dedicated controller.
The MIPI CSI-2 controller (which differs between A31 and A83T) is supported
as a separate driver and connected through the fwnode graph.

The two controllers are likely connected through some kind of FIFO,
so the CSI controller doesn't have much to do itself except for selecting
the MIPI CSI-2 input.

Co-developed-by: Kévin L'hôpital <kevin.lhopital@...tlin.com>
Signed-off-by: Kévin L'hôpital <kevin.lhopital@...tlin.com>
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
---
 drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
index a876a05ea3c7..e770153cf3ab 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c
@@ -459,6 +459,9 @@ static void sun6i_csi_setup_bus(struct sun6i_csi_dev *sdev)
 		if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
 			cfg |= CSI_IF_CFG_CLK_POL_FALLING_EDGE;
 		break;
+	case V4L2_MBUS_CSI2_DPHY:
+		cfg |= CSI_IF_CFG_MIPI_IF_MIPI;
+		break;
 	default:
 		dev_warn(sdev->dev, "Unsupported bus type: %d\n",
 			 endpoint->bus_type);
@@ -713,6 +716,7 @@ static int sun6i_csi_fwnode_parse(struct device *dev,
 	}
 
 	switch (vep->bus_type) {
+	case V4L2_MBUS_CSI2_DPHY:
 	case V4L2_MBUS_PARALLEL:
 	case V4L2_MBUS_BT656:
 		csi->v4l2_ep = *vep;
-- 
2.28.0