[PATCH 05/05] video: Add support for rgb555 pixel formats to vivi

[Magnus Damm <magnus.damm@gmail.com>]

From: Magnus Damm <damm@igel.co.jp>

This patch adds RGB555 pixel format support to the vivi driver. Both
little endian and big endian versions are added. The driver follows
the RGB pixel format described in Table 2-2 of the V4L2 API spec,
_not_ the older BGR interpretation described in Table 2-1.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
---

 drivers/media/video/vivi.c |   40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

--- 0019/drivers/media/video/vivi.c
+++ work/drivers/media/video/vivi.c	2008-10-14 20:29:17.000000000 +0900
@@ -149,6 +149,16 @@ static struct vivi_fmt formats[] = {
 		.fourcc   = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
 		.depth    = 16,
 	},
+	{
+		.name     = "RGB555 (LE)",
+		.fourcc   = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
+		.depth    = 16,
+	},
+	{
+		.name     = "RGB555 (BE)",
+		.fourcc   = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
+		.depth    = 16,
+	},
 };
 
 static struct vivi_fmt *get_format(struct v4l2_format *f)
@@ -335,6 +345,30 @@ static void gen_twopix(struct vivi_fh *f
 				break;
 			}
 			break;
+		case V4L2_PIX_FMT_RGB555:
+			switch (color) {
+			case 0:
+			case 2:
+				*p = (g_u << 5) | b_v;
+				break;
+			case 1:
+			case 3:
+				*p = (r_y << 2) | (g_u >> 3);
+				break;
+			}
+			break;
+		case V4L2_PIX_FMT_RGB555X:
+			switch (color) {
+			case 0:
+			case 2:
+				*p = (r_y << 2) | (g_u >> 3);
+				break;
+			case 1:
+			case 3:
+				*p = (g_u << 5) | b_v;
+				break;
+			}
+			break;
 		}
 	}
 }
@@ -818,6 +852,12 @@ static int vidioc_s_fmt_vid_cap(struct f
 			g >>= 2;
 			b >>= 3;
 			break;
+		case V4L2_PIX_FMT_RGB555:
+		case V4L2_PIX_FMT_RGB555X:
+			r >>= 3;
+			g >>= 3;
+			b >>= 3;
+			break;
 		}
 
 		if (is_yuv) {

--
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