media: staging: rkisp1: add capability V4L2_CAP_IO_MC to capture devices

The capture devices supports YUV, RGB, and Bayer formats.
Adding V4L2_CAP_IO_MC capability will reflect userspace
what format should be set on the resizer in order to stream
each of the video formats.

The patch adds a 'mbus' field to the struct
'rkisp1_capture_fmt_cfg' which maps the video format
to the needed mbus format.
Signed-off-by: NDafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: NHelen Koike <helen.koike@collabora.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/rkisp1/rkisp1-capture.c

@@ -49,12 +49,14 @@ enum rkisp1_plane {
  * @uv_swap: if cb cr swaped, for yuv
  * @write_format: defines how YCbCr self picture data is written to memory
  * @output_format: defines sp output format
+ * @mbus: the mbus code on the src resizer pad that matches the pixel format
  */
 struct rkisp1_capture_fmt_cfg {
 	u32 fourcc;
 	u8 uv_swap;
 	u32 write_format;
 	u32 output_format;
+	u32 mbus;
 };
 
 struct rkisp1_capture_ops {
@@ -88,92 +90,116 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_mp_fmts[] = {
 		.fourcc = V4L2_PIX_FMT_YUYV,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUVINT,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YUV422P,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV16,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV61,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YVU422M,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 	/* yuv420 */
 	{
 		.fourcc = V4L2_PIX_FMT_NV21,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV12,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV21M,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV12M,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YUV420,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YVU420,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	},
 	/* yuv400 */
 	{
 		.fourcc = V4L2_PIX_FMT_GREY,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUVINT,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 	/* raw */
 	{
 		.fourcc = V4L2_PIX_FMT_SRGGB8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_SRGGB8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_SGRBG8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_SGBRG8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SBGGR8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.mbus = MEDIA_BUS_FMT_SBGGR8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SRGGB10,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SRGGB10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG10,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SGRBG10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG10,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SGBRG10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SBGGR10,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SBGGR10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SRGGB12,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SRGGB12_1X12,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG12,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SGRBG12_1X12,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG12,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SGBRG12_1X12,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SBGGR12,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.mbus = MEDIA_BUS_FMT_SBGGR12_1X12,
 	},
 };
 
@@ -184,26 +210,31 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_sp_fmts[] = {
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_INT,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV422,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YUV422P,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_PLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV422,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV16,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_SPLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV422,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV61,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_SPLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV422,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YVU422M,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_PLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV422,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 	/* yuv420 */
 	{
@@ -211,31 +242,37 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_sp_fmts[] = {
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_SPLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV420,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV12,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_SPLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV420,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV21M,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_SPLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV420,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV12M,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_SPLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV420,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YUV420,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_PLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV420,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YVU420,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_PLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV420,
+		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	},
 	/* yuv400 */
 	{
@@ -243,16 +280,19 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_sp_fmts[] = {
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_INT,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV400,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 	/* rgb */
 	{
 		.fourcc = V4L2_PIX_FMT_XBGR32,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_PLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_RGB888,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_RGB565,
 		.write_format = RKISP1_MI_CTRL_SP_WRITE_PLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_RGB565,
+		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 };
 
@@ -1096,14 +1136,27 @@ static int rkisp1_enum_fmt_vid_cap_mplane(struct file *file, void *priv,
 {
 	struct rkisp1_capture *cap = video_drvdata(file);
 	const struct rkisp1_capture_fmt_cfg *fmt = NULL;
+	unsigned int i, n = 0;
 
-	if (f->index >= cap->config->fmt_size)
-		return -EINVAL;
+	if (!f->mbus_code) {
+		if (f->index >= cap->config->fmt_size)
+			return -EINVAL;
 
-	fmt = &cap->config->fmts[f->index];
-	f->pixelformat = fmt->fourcc;
+		fmt = &cap->config->fmts[f->index];
+		f->pixelformat = fmt->fourcc;
+		return 0;
+	}
 
-	return 0;
+	for (i = 0; i < cap->config->fmt_size; i++) {
+		if (cap->config->fmts[i].mbus != f->mbus_code)
+			continue;
+
+		if (n++ == f->index) {
+			f->pixelformat = cap->config->fmts[i].fourcc;
+			return 0;
+		}
+	}
+	return -EINVAL;
 }
 
 static int rkisp1_s_fmt_vid_cap_mplane(struct file *file,
@@ -1251,7 +1304,7 @@ static int rkisp1_register_capture(struct rkisp1_capture *cap)
 	vdev->v4l2_dev = v4l2_dev;
 	vdev->lock = &node->vlock;
 	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
-			    V4L2_CAP_STREAMING;
+			    V4L2_CAP_STREAMING | V4L2_CAP_IO_MC;
 	vdev->entity.ops = &rkisp1_media_ops;
 	video_set_drvdata(vdev, cap);
 	vdev->vfl_dir = VFL_DIR_RX;