[v2,4/5] media: atmel-isi: setup YCC_SWAP correctly when using preview path

Commit Message

Josh Wu Nov. 3, 2015, 5:45 a.m. UTC

The preview path only can convert UYVY format to RGB data.

To make preview path work correctly, we need to set up YCC_SWAP
according to sensor output and convert them to UYVY.

Signed-off-by: Josh Wu <[e-mail]>
---

Changes in v2:
- remove cfg2_yuv_swap for rgb format
- correct the comment style

 drivers/media/platform/soc_camera/atmel-isi.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

Patch

diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index ae82068..826d04e 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -117,6 +117,20 @@  static u32 setup_cfg2_yuv_swap(struct atmel_isi *isi,
 		case MEDIA_BUS_FMT_YVYU8_2X8:
 			return ISI_CFG2_YCC_SWAP_MODE_1;
 		}
+	} else if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_RGB565) {
+		/*
+		 * Preview path is enabled, it will convert UYVY to RGB format.
+		 * But if sensor output format is not UYVY, we need to set
+		 * YCC_SWAP_MODE to convert it as UYVY.
+		 */
+		switch (xlate->code) {
+		case MEDIA_BUS_FMT_VYUY8_2X8:
+			return ISI_CFG2_YCC_SWAP_MODE_1;
+		case MEDIA_BUS_FMT_YUYV8_2X8:
+			return ISI_CFG2_YCC_SWAP_MODE_2;
+		case MEDIA_BUS_FMT_YVYU8_2X8:
+			return ISI_CFG2_YCC_SWAP_MODE_3;
+		}
 	}
 
 	/*