media: staging: rkisp1: fix configuration for GREY pixelformat

This patch changes the device configuration to support capture
of V4L2_PIX_FMT_GREY video. The 'write_format' field of the format
description should be planar.
Also the array 'pixm->plane_fmt' that describes the planes should
be memset to 0 before filling it since the the cb, cr planes should
be 0.
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Acked-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

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

@@ -120,7 +120,7 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_mp_fmts[] = {
 	{
 		.fourcc = V4L2_PIX_FMT_GREY,
 		.uv_swap = 0,
-		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUVINT,
+		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 	/* yuv420 */
@@ -248,7 +248,7 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_sp_fmts[] = {
 	{
 		.fourcc = V4L2_PIX_FMT_GREY,
 		.uv_swap = 0,
-		.write_format = RKISP1_MI_CTRL_SP_WRITE_INT,
+		.write_format = RKISP1_MI_CTRL_SP_WRITE_PLA,
 		.output_format = RKISP1_MI_CTRL_SP_OUTPUT_YUV400,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
@@ -1059,6 +1059,7 @@ rkisp1_fill_pixfmt(struct v4l2_pix_format_mplane *pixm,
 	unsigned int i;
 	u32 stride;
 
+	memset(pixm->plane_fmt, 0, sizeof(pixm->plane_fmt));
 	info = v4l2_format_info(pixm->pixelformat);
 	pixm->num_planes = info->mem_planes;
 	stride = info->bpp[0] * pixm->width;