media: camss: vfe: Different format support on source pad

Rework the format selection on the source pad. Make the format
on the source pad selectable amongst a list of formats. This
list can be different for each sink pad format.

Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/qcom/camss/camss-vfe.c

@@ -124,6 +124,131 @@ static u8 vfe_get_bpp(const struct vfe_format *formats,
 	return formats[0].bpp;
 }
 
+static u32 vfe_find_code(u32 *code, unsigned int n_code,
+			 unsigned int index, u32 req_code)
+{
+	int i;
+
+	if (!req_code && (index >= n_code))
+		return 0;
+
+	for (i = 0; i < n_code; i++)
+		if (req_code) {
+			if (req_code == code[i])
+				return req_code;
+		} else {
+			if (i == index)
+				return code[i];
+		}
+
+	return code[0];
+}
+
+static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
+			    unsigned int index, u32 src_req_code)
+{
+	struct vfe_device *vfe = to_vfe(line);
+
+	if (vfe->camss->version == CAMSS_8x16)
+		switch (sink_code) {
+		case MEDIA_BUS_FMT_YUYV8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_YUYV8_2X8,
+				MEDIA_BUS_FMT_YUYV8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		case MEDIA_BUS_FMT_YVYU8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_YVYU8_2X8,
+				MEDIA_BUS_FMT_YVYU8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		case MEDIA_BUS_FMT_UYVY8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_UYVY8_2X8,
+				MEDIA_BUS_FMT_UYVY8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		case MEDIA_BUS_FMT_VYUY8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_VYUY8_2X8,
+				MEDIA_BUS_FMT_VYUY8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		default:
+			if (index > 0)
+				return 0;
+
+			return sink_code;
+		}
+	else if (vfe->camss->version == CAMSS_8x96)
+		switch (sink_code) {
+		case MEDIA_BUS_FMT_YUYV8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_YUYV8_2X8,
+				MEDIA_BUS_FMT_YUYV8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		case MEDIA_BUS_FMT_YVYU8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_YVYU8_2X8,
+				MEDIA_BUS_FMT_YVYU8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		case MEDIA_BUS_FMT_UYVY8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_UYVY8_2X8,
+				MEDIA_BUS_FMT_UYVY8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		case MEDIA_BUS_FMT_VYUY8_2X8:
+		{
+			u32 src_code[] = {
+				MEDIA_BUS_FMT_VYUY8_2X8,
+				MEDIA_BUS_FMT_VYUY8_1_5X8,
+			};
+
+			return vfe_find_code(src_code, ARRAY_SIZE(src_code),
+					     index, src_req_code);
+		}
+		default:
+			if (index > 0)
+				return 0;
+
+			return sink_code;
+		}
+	else
+		return 0;
+}
+
 /*
  * vfe_reset - Trigger reset on VFE module and wait to complete
  * @vfe: VFE device
@@ -1388,11 +1513,11 @@ static void vfe_try_format(struct vfe_line *line,
 
 	case MSM_VFE_PAD_SRC:
 		/* Set and return a format same as sink pad */
-
 		code = fmt->code;
 
-		*fmt = *__vfe_get_format(line, cfg, MSM_VFE_PAD_SINK,
-					 which);
+		*fmt = *__vfe_get_format(line, cfg, MSM_VFE_PAD_SINK, which);
+
+		fmt->code = vfe_src_pad_code(line, fmt->code, 0, code);
 
 		if (line->id == VFE_LINE_PIX) {
 			struct v4l2_rect *rect;
@@ -1401,34 +1526,6 @@ static void vfe_try_format(struct vfe_line *line,
 
 			fmt->width = rect->width;
 			fmt->height = rect->height;
-
-			switch (fmt->code) {
-			case MEDIA_BUS_FMT_YUYV8_2X8:
-				if (code == MEDIA_BUS_FMT_YUYV8_1_5X8)
-					fmt->code = MEDIA_BUS_FMT_YUYV8_1_5X8;
-				else
-					fmt->code = MEDIA_BUS_FMT_YUYV8_2X8;
-				break;
-			case MEDIA_BUS_FMT_YVYU8_2X8:
-				if (code == MEDIA_BUS_FMT_YVYU8_1_5X8)
-					fmt->code = MEDIA_BUS_FMT_YVYU8_1_5X8;
-				else
-					fmt->code = MEDIA_BUS_FMT_YVYU8_2X8;
-				break;
-			case MEDIA_BUS_FMT_UYVY8_2X8:
-			default:
-				if (code == MEDIA_BUS_FMT_UYVY8_1_5X8)
-					fmt->code = MEDIA_BUS_FMT_UYVY8_1_5X8;
-				else
-					fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
-				break;
-			case MEDIA_BUS_FMT_VYUY8_2X8:
-				if (code == MEDIA_BUS_FMT_VYUY8_1_5X8)
-					fmt->code = MEDIA_BUS_FMT_VYUY8_1_5X8;
-				else
-					fmt->code = MEDIA_BUS_FMT_VYUY8_2X8;
-				break;
-			}
 		}
 
 		break;
@@ -1532,7 +1629,6 @@ static int vfe_enum_mbus_code(struct v4l2_subdev *sd,
 			      struct v4l2_subdev_mbus_code_enum *code)
 {
 	struct vfe_line *line = v4l2_get_subdevdata(sd);
-	struct v4l2_mbus_framefmt *format;
 
 	if (code->pad == MSM_VFE_PAD_SINK) {
 		if (code->index >= line->nformats)
@@ -1540,13 +1636,15 @@ static int vfe_enum_mbus_code(struct v4l2_subdev *sd,
 
 		code->code = line->formats[code->index].code;
 	} else {
-		if (code->index > 0)
-			return -EINVAL;
+		struct v4l2_mbus_framefmt *sink_fmt;
 
-		format = __vfe_get_format(line, cfg, MSM_VFE_PAD_SINK,
-					  code->which);
+		sink_fmt = __vfe_get_format(line, cfg, MSM_VFE_PAD_SINK,
+					    code->which);
 
-		code->code = format->code;
+		code->code = vfe_src_pad_code(line, sink_fmt->code,
+					      code->index, 0);
+		if (!code->code)
+			return -EINVAL;
 	}
 
 	return 0;