[media] vivid-tpg: separate planes and buffers

Add a new field that contains the number of buffers. This may be
less than the number of planes in case multiple planes are combined
into one buffer.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/vivid/vivid-tpg.c

@@ -170,7 +170,9 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 {
 	tpg->fourcc = fourcc;
 	tpg->planes = 1;
+	tpg->buffers = 1;
 	tpg->recalc_colors = true;
+
 	switch (fourcc) {
 	case V4L2_PIX_FMT_RGB565:
 	case V4L2_PIX_FMT_RGB565X:
@@ -190,6 +192,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		break;
 	case V4L2_PIX_FMT_NV16M:
 	case V4L2_PIX_FMT_NV61M:
+		tpg->buffers = 2;
 		tpg->planes = 2;
 		/* fall-through */
 	case V4L2_PIX_FMT_YUYV:

drivers/media/platform/vivid/vivid-tpg.h

@@ -138,6 +138,7 @@ struct tpg_data {
 	enum tpg_pixel_aspect		pix_aspect;
 	unsigned			rgb_range;
 	unsigned			real_rgb_range;
+	unsigned			buffers;
 	unsigned			planes;
 	/* Used to store the colors in native format, either RGB or YUV */
 	u8				colors[TPG_COLOR_MAX][3];
@@ -327,6 +328,11 @@ static inline u32 tpg_g_quantization(const struct tpg_data *tpg)
 	return tpg->quantization;
 }
 
+static inline unsigned tpg_g_buffers(const struct tpg_data *tpg)
+{
+	return tpg->buffers;
+}
+
 static inline unsigned tpg_g_planes(const struct tpg_data *tpg)
 {
 	return tpg->planes;