linux-kernel - [PATCH v2 3/3] media: st-mipid02: add support of JPEG

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Date:   Mon, 17 Jun 2019 15:43:58 +0200
From:   Hugues Fruchet <hugues.fruchet@...com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mickael Guene <mickael.guene@...com>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Hugues Fruchet" <hugues.fruchet@...com>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>
Subject: [PATCH v2 3/3] media: st-mipid02: add support of JPEG

Add support of JPEG pixel format.
This requires auto detection of data type from CSI-2 stream.

Signed-off-by: Hugues Fruchet <hugues.fruchet@...com>
---
 drivers/media/i2c/st-mipid02.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
index 35946ad..ff8a4d8 100644
--- a/drivers/media/i2c/st-mipid02.c
+++ b/drivers/media/i2c/st-mipid02.c
@@ -64,6 +64,7 @@ static const u32 mipid02_supported_fmt_codes[] = {
 	MEDIA_BUS_FMT_UYVY8_1X16, MEDIA_BUS_FMT_BGR888_1X24,
 	MEDIA_BUS_FMT_RGB565_2X8_LE, MEDIA_BUS_FMT_RGB565_2X8_BE,
 	MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_UYVY8_2X8,
+	MEDIA_BUS_FMT_JPEG_1X8
 };
 
 /* regulator supplies */
@@ -101,6 +102,7 @@ struct mipid02_dev {
 		u8 data_lane1_reg1;
 		u8 mode_reg1;
 		u8 mode_reg2;
+		u8 data_selection_ctrl;
 		u8 data_id_rreg;
 		u8 pix_width_ctrl;
 		u8 pix_width_ctrl_emb;
@@ -463,6 +465,7 @@ static int mipid02_configure_from_tx(struct mipid02_dev *bridge)
 {
 	struct v4l2_fwnode_endpoint *ep = &bridge->tx;
 
+	bridge->r.data_selection_ctrl = SELECTION_MANUAL_WIDTH;
 	bridge->r.pix_width_ctrl = ep->bus.parallel.bus_width;
 	bridge->r.pix_width_ctrl_emb = ep->bus.parallel.bus_width;
 	if (ep->bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
@@ -478,10 +481,15 @@ static int mipid02_configure_from_code(struct mipid02_dev *bridge)
 	u8 data_type;
 
 	bridge->r.data_id_rreg = 0;
-	data_type = data_type_from_code(bridge->fmt.code);
-	if (!data_type)
-		return -EINVAL;
-	bridge->r.data_id_rreg = data_type;
+
+	if (bridge->fmt.code != MEDIA_BUS_FMT_JPEG_1X8) {
+		bridge->r.data_selection_ctrl |= SELECTION_MANUAL_DATA;
+
+		data_type = data_type_from_code(bridge->fmt.code);
+		if (!data_type)
+			return -EINVAL;
+		bridge->r.data_id_rreg = data_type;
+	}
 
 	return 0;
 }
@@ -565,7 +573,7 @@ static int mipid02_stream_enable(struct mipid02_dev *bridge)
 	if (ret)
 		goto error;
 	ret = mipid02_write_reg(bridge, MIPID02_DATA_SELECTION_CTRL,
-		SELECTION_MANUAL_DATA | SELECTION_MANUAL_WIDTH);
+		bridge->r.data_selection_ctrl);
 	if (ret)
 		goto error;
 	ret = mipid02_write_reg(bridge, MIPID02_PIX_WIDTH_CTRL,
-- 
2.7.4