linux-kernel - [PATCH v6 14/43] media: sun6i-csi: Introduce and use video helper functions

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Message-Id: <20220826183240.604834-15-paul.kocialkowski@bootlin.com>
Date:   Fri, 26 Aug 2022 20:32:11 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH v6 14/43] media: sun6i-csi: Introduce and use video helper functions

Introduce some helpers for buffer and general video configuration.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>
---
 .../platform/sunxi/sun6i-csi/sun6i_video.c    | 46 +++++++++++--------
 1 file changed, 28 insertions(+), 18 deletions(-)

diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
index a2881b1d7420..a40927899828 100644
--- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
+++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_video.c
@@ -92,6 +92,29 @@ static bool sun6i_video_format_check(u32 format)
 	return false;
 }
 
+/* Video */
+
+static void sun6i_video_buffer_configure(struct sun6i_csi_device *csi_dev,
+					 struct sun6i_csi_buffer *csi_buffer)
+{
+	csi_buffer->queued_to_csi = true;
+	sun6i_csi_update_buf_addr(csi_dev, csi_buffer->dma_addr);
+}
+
+static void sun6i_video_configure(struct sun6i_csi_device *csi_dev)
+{
+	struct sun6i_video *video = &csi_dev->video;
+	struct sun6i_csi_config config = { 0 };
+
+	config.pixelformat = video->format.fmt.pix.pixelformat;
+	config.code = video->mbus_code;
+	config.field = video->format.fmt.pix.field;
+	config.width = video->format.fmt.pix.width;
+	config.height = video->format.fmt.pix.height;
+
+	sun6i_csi_update_config(csi_dev, &config);
+}
+
 /* Queue */
 
 static int sun6i_video_queue_setup(struct vb2_queue *queue,
@@ -160,7 +183,6 @@ static int sun6i_video_start_streaming(struct vb2_queue *queue,
 	struct video_device *video_dev = &video->video_dev;
 	struct sun6i_csi_buffer *buf;
 	struct sun6i_csi_buffer *next_buf;
-	struct sun6i_csi_config config;
 	struct v4l2_subdev *subdev;
 	unsigned long flags;
 	int ret;
@@ -182,22 +204,13 @@ static int sun6i_video_start_streaming(struct vb2_queue *queue,
 		goto error_media_pipeline;
 	}
 
-	config.pixelformat = video->format.fmt.pix.pixelformat;
-	config.code = video->mbus_code;
-	config.field = video->format.fmt.pix.field;
-	config.width = video->format.fmt.pix.width;
-	config.height = video->format.fmt.pix.height;
-
-	ret = sun6i_csi_update_config(csi_dev, &config);
-	if (ret < 0)
-		goto error_media_pipeline;
+	sun6i_video_configure(csi_dev);
 
 	spin_lock_irqsave(&video->dma_queue_lock, flags);
 
 	buf = list_first_entry(&video->dma_queue,
 			       struct sun6i_csi_buffer, list);
-	buf->queued_to_csi = true;
-	sun6i_csi_update_buf_addr(csi_dev, buf->dma_addr);
+	sun6i_video_buffer_configure(csi_dev, buf);
 
 	sun6i_csi_set_stream(csi_dev, true);
 
@@ -219,8 +232,7 @@ static int sun6i_video_start_streaming(struct vb2_queue *queue,
 	 * would also drop frame when lacking of queued buffer.
 	 */
 	next_buf = list_next_entry(buf, list);
-	next_buf->queued_to_csi = true;
-	sun6i_csi_update_buf_addr(csi_dev, next_buf->dma_addr);
+	sun6i_video_buffer_configure(csi_dev, next_buf);
 
 	spin_unlock_irqrestore(&video->dma_queue_lock, flags);
 
@@ -294,8 +306,7 @@ void sun6i_video_frame_done(struct sun6i_csi_device *csi_dev)
 	 * for next ISR call.
 	 */
 	if (!next_buf->queued_to_csi) {
-		next_buf->queued_to_csi = true;
-		sun6i_csi_update_buf_addr(csi_dev, next_buf->dma_addr);
+		sun6i_video_buffer_configure(csi_dev, next_buf);
 		dev_dbg(csi_dev->dev, "Frame dropped!\n");
 		goto complete;
 	}
@@ -309,8 +320,7 @@ void sun6i_video_frame_done(struct sun6i_csi_device *csi_dev)
 	/* Prepare buffer for next frame but one.  */
 	if (!list_is_last(&next_buf->list, &video->dma_queue)) {
 		next_buf = list_next_entry(next_buf, list);
-		next_buf->queued_to_csi = true;
-		sun6i_csi_update_buf_addr(csi_dev, next_buf->dma_addr);
+		sun6i_video_buffer_configure(csi_dev, next_buf);
 	} else {
 		dev_dbg(csi_dev->dev, "Next frame will be dropped!\n");
 	}
-- 
2.37.1