openwrt/target/linux/brcm2708/patches-3.10/0141-V4L2-Fix-issue-when-switching-down-JPEG-resolution.patch

From 8a529de86bee2dd7e76fc77d0364ace6df3da685 Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dsteve@broadcom.com>
Date: Mon, 9 Dec 2013 11:24:55 +0000
Subject: [PATCH 141/196] V4L2: Fix issue when switching down JPEG resolution.

JPEG buffer size calculation is based on input resolution.
Input resolution was being configured after output port
format. Caused failures if switching from one JPEG resolution
to a smaller one.

Signed-off-by: Dave Stevenson <dsteve@broadcom.com>
---
 drivers/media/platform/bcm2835/bcm2835-camera.c | 126 ++++++++++++++----------
 1 file changed, 72 insertions(+), 54 deletions(-)

diff --git a/drivers/media/platform/bcm2835/bcm2835-camera.c b/drivers/media/platform/bcm2835/bcm2835-camera.c
index 9fc90a2..4780107 100644
--- a/drivers/media/platform/bcm2835/bcm2835-camera.c
+++ b/drivers/media/platform/bcm2835/bcm2835-camera.c
@@ -955,69 +955,87 @@ static int mmal_setup_components(struct bm2835_mmal_dev *dev,
 			camera_port->current_buffer.num =
 			    camera_port->recommended_buffer.num;
 
-			port->format.encoding = mfmt->mmal;
-			port->format.encoding_variant = 0;
-			/* Set any encoding specific parameters */
-			switch (mfmt->mmal_component) {
-			case MMAL_COMPONENT_VIDEO_ENCODE:
-				port->format.bitrate =
-				    dev->capture.encode_bitrate;
-				break;
-			case MMAL_COMPONENT_IMAGE_ENCODE:
-				/* Could set EXIF parameters here */
-				break;
-			default:
-				break;
-			}
-			ret = vchiq_mmal_port_set_format(dev->instance, port);
-
+			ret =
+			    vchiq_mmal_port_connect_tunnel(
+					dev->instance,
+					camera_port,
+					&encode_component->input[0]);
 			if (ret) {
-				v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
-					 "%s failed to set format\n", __func__);
+				v4l2_dbg(1, bcm2835_v4l2_debug,
+					 &dev->v4l2_dev,
+					 "%s failed to create connection\n",
+					 __func__);
+				/* ensure capture is not going to be tried */
+				dev->capture.port = NULL;
 			} else {
+				port->es.video.width = f->fmt.pix.width;
+				port->es.video.height = f->fmt.pix.height;
+				port->es.video.crop.x = 0;
+				port->es.video.crop.y = 0;
+				port->es.video.crop.width = f->fmt.pix.width;
+				port->es.video.crop.height = f->fmt.pix.height;
+				port->es.video.frame_rate.num =
+					  dev->capture.timeperframe.denominator;
+				port->es.video.frame_rate.den =
+					  dev->capture.timeperframe.numerator;
+
+				port->format.encoding = mfmt->mmal;
+				port->format.encoding_variant = 0;
+				/* Set any encoding specific parameters */
+				switch (mfmt->mmal_component) {
+				case MMAL_COMPONENT_VIDEO_ENCODE:
+					port->format.bitrate =
+					    dev->capture.encode_bitrate;
+					break;
+				case MMAL_COMPONENT_IMAGE_ENCODE:
+					/* Could set EXIF parameters here */
+					break;
+				default:
+					break;
+				}
+				ret = vchiq_mmal_port_set_format(dev->instance,
+								 port);
+				if (ret)
+					v4l2_dbg(1, bcm2835_v4l2_debug,
+						 &dev->v4l2_dev,
+						 "%s failed to set format\n",
+						 __func__);
+			}
+
+			if (!ret) {
 				ret = vchiq_mmal_component_enable(
 						dev->instance,
 						encode_component);
 				if (ret) {
 					v4l2_dbg(1, bcm2835_v4l2_debug,
-						 &dev->v4l2_dev,
-						 "%s Failed to enable encode components\n",
-						 __func__);
-				} else {
-					/* configure buffering */
-					port->current_buffer.num = 1;
-					port->current_buffer.size =
-					    f->fmt.pix.sizeimage;
-					if (port->format.encoding ==
-					    MMAL_ENCODING_JPEG) {
-						v4l2_dbg(1, bcm2835_v4l2_debug,
-							 &dev->v4l2_dev,
-							 "JPEG - fiddle buffer size\n");
-						port->current_buffer.size =
-						    (f->fmt.pix.sizeimage <
-						     (100 << 10))
-						    ? (100 << 10) : f->fmt.pix.
-						    sizeimage;
-					}
+					   &dev->v4l2_dev,
+					   "%s Failed to enable encode components\n",
+					   __func__);
+				}
+			}
+			if (!ret) {
+				/* configure buffering */
+				port->current_buffer.num = 1;
+				port->current_buffer.size =
+				    f->fmt.pix.sizeimage;
+				if (port->format.encoding ==
+				    MMAL_ENCODING_JPEG) {
 					v4l2_dbg(1, bcm2835_v4l2_debug,
-						 &dev->v4l2_dev,
-						 "vid_cap - current_buffer.size being set to %d\n",
-						 f->fmt.pix.sizeimage);
-					port->current_buffer.alignment = 0;
-					ret =
-					    vchiq_mmal_port_connect_tunnel(
-							dev->instance,
-							camera_port,
-							&encode_component->input[0]);
-					if (ret) {
-						v4l2_dbg(1, bcm2835_v4l2_debug,
-							 &dev->v4l2_dev,
-							 "%s failed to create connection\n",
-							 __func__);
-						/* ensure capture is not going to be tried */
-						dev->capture.port = NULL;
-					}
+					    &dev->v4l2_dev,
+					    "JPG - buf size now %d was %d\n",
+					    f->fmt.pix.sizeimage,
+					    port->current_buffer.size);
+					port->current_buffer.size =
+					    (f->fmt.pix.sizeimage <
+					     (100 << 10))
+					    ? (100 << 10) : f->fmt.pix.
+					    sizeimage;
 				}
+				v4l2_dbg(1, bcm2835_v4l2_debug,
+					 &dev->v4l2_dev,
+					 "vid_cap - cur_buf.size set to %d\n",
+					 f->fmt.pix.sizeimage);
+				port->current_buffer.alignment = 0;
 			}
 		} else {
 			/* configure buffering */
-- 
1.9.1