[media] atmel-isi: setup the ISI_CFG2 register directly

In the function configure_geometry(), we will setup the ISI CFG2 according to the sensor output format. It make no sense to just read back the CFG2 register and just set part of it. So just set up this register directly makes things simpler. Currently only support YUV format from camera sensor. Signed-off-by: Josh Wu <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]> Signed-off-by: Guennadi Liakhovetski <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]>
jimmycarry · Sep 25, 2015 · ad5f9d1 · ad5f9d1
1 parent d67b488
commit ad5f9d1
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Showing 2 changed files with 9 additions and 13 deletions.
diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -105,42 +105,36 @@ static u32 isi_readl(struct atmel_isi *isi, u32 reg)
 static int configure_geometry(struct atmel_isi *isi, u32 width,
 			u32 height, u32 code)
 {
-	u32 cfg2, cr;
+	u32 cfg2;
 
+	/* According to sensor's output format to set cfg2 */
 	switch (code) {
 	/* YUV, including grey */
 	case MEDIA_BUS_FMT_Y8_1X8:
-		cr = ISI_CFG2_GRAYSCALE;
+		cfg2 = ISI_CFG2_GRAYSCALE | ISI_CFG2_COL_SPACE_YCbCr;
 		break;
 	case MEDIA_BUS_FMT_VYUY8_2X8:
-		cr = ISI_CFG2_YCC_SWAP_MODE_3;
+		cfg2 = ISI_CFG2_YCC_SWAP_MODE_3 | ISI_CFG2_COL_SPACE_YCbCr;
 		break;
 	case MEDIA_BUS_FMT_UYVY8_2X8:
-		cr = ISI_CFG2_YCC_SWAP_MODE_2;
+		cfg2 = ISI_CFG2_YCC_SWAP_MODE_2 | ISI_CFG2_COL_SPACE_YCbCr;
 		break;
 	case MEDIA_BUS_FMT_YVYU8_2X8:
-		cr = ISI_CFG2_YCC_SWAP_MODE_1;
+		cfg2 = ISI_CFG2_YCC_SWAP_MODE_1 | ISI_CFG2_COL_SPACE_YCbCr;
 		break;
 	case MEDIA_BUS_FMT_YUYV8_2X8:
-		cr = ISI_CFG2_YCC_SWAP_DEFAULT;
+		cfg2 = ISI_CFG2_YCC_SWAP_DEFAULT | ISI_CFG2_COL_SPACE_YCbCr;
 		break;
 	/* RGB, TODO */
 	default:
 		return -EINVAL;
 	}
 
 	isi_writel(isi, ISI_CTRL, ISI_CTRL_DIS);
-
-	cfg2 = isi_readl(isi, ISI_CFG2);
-	/* Set YCC swap mode */
-	cfg2 &= ~ISI_CFG2_YCC_SWAP_MODE_MASK;
-	cfg2 |= cr;
 	/* Set width */
-	cfg2 &= ~(ISI_CFG2_IM_HSIZE_MASK);
 	cfg2 |= ((width - 1) << ISI_CFG2_IM_HSIZE_OFFSET) &
 			ISI_CFG2_IM_HSIZE_MASK;
 	/* Set height */
-	cfg2 &= ~(ISI_CFG2_IM_VSIZE_MASK);
 	cfg2 |= ((height - 1) << ISI_CFG2_IM_VSIZE_OFFSET)
 			& ISI_CFG2_IM_VSIZE_MASK;
 	isi_writel(isi, ISI_CFG2, cfg2);

diff --git a/include/media/atmel-isi.h b/include/media/atmel-isi.h
@@ -66,6 +66,8 @@
 
 /* Bitfields in CFG2 */
 #define ISI_CFG2_GRAYSCALE			(1 << 13)
+#define ISI_CFG2_COL_SPACE_YCbCr		(0 << 15)
+#define ISI_CFG2_COL_SPACE_RGB			(1 << 15)
 /* Constants for YCC_SWAP(ISI_V2) */
 #define		ISI_CFG2_YCC_SWAP_DEFAULT	(0 << 28)
 #define		ISI_CFG2_YCC_SWAP_MODE_1	(1 << 28)