media: vivid: add pixel_array test control

This control will change dimensions according to the source resolution.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/test-drivers/vivid/vivid-core.h

@@ -35,7 +35,9 @@
 #define MAX_HEIGHT 2160
 /* The minimum image width/height */
 #define MIN_WIDTH  16
-#define MIN_HEIGHT 16
+#define MIN_HEIGHT MIN_WIDTH
+/* Pixel Array control divider */
+#define PIXEL_ARRAY_DIV MIN_WIDTH
 /* The data_offset of plane 0 for the multiplanar formats */
 #define PLANE0_DATA_OFFSET 128
 
@@ -227,6 +229,7 @@ struct vivid_dev {
 	struct v4l2_ctrl		*bitmask;
 	struct v4l2_ctrl		*int_menu;
 	struct v4l2_ctrl		*ro_int32;
+	struct v4l2_ctrl		*pixel_array;
 	struct v4l2_ctrl		*test_pattern;
 	struct v4l2_ctrl		*colorspace;
 	struct v4l2_ctrl		*rgb_range_cap;

drivers/media/test-drivers/vivid/vivid-ctrls.c

@@ -35,6 +35,7 @@
 #define VIVID_CID_AREA			(VIVID_CID_CUSTOM_BASE + 11)
 #define VIVID_CID_RO_INTEGER		(VIVID_CID_CUSTOM_BASE + 12)
 #define VIVID_CID_U32_DYN_ARRAY		(VIVID_CID_CUSTOM_BASE + 13)
+#define VIVID_CID_U8_PIXEL_ARRAY	(VIVID_CID_CUSTOM_BASE + 14)
 
 #define VIVID_CID_VIVID_BASE		(0x00f00000 | 0xf000)
 #define VIVID_CID_VIVID_CLASS		(0x00f00000 | 1)
@@ -228,6 +229,18 @@ static const struct v4l2_ctrl_config vivid_ctrl_u8_4d_array = {
 	.dims = { 2, 3, 4, 5 },
 };
 
+static const struct v4l2_ctrl_config vivid_ctrl_u8_pixel_array = {
+	.ops = &vivid_user_gen_ctrl_ops,
+	.id = VIVID_CID_U8_PIXEL_ARRAY,
+	.name = "U8 Pixel Array",
+	.type = V4L2_CTRL_TYPE_U8,
+	.def = 0x80,
+	.min = 0x00,
+	.max = 0xff,
+	.step = 1,
+	.dims = { 640 / PIXEL_ARRAY_DIV, 360 / PIXEL_ARRAY_DIV },
+};
+
 static const char * const vivid_ctrl_menu_strings[] = {
 	"Menu Item 0 (Skipped)",
 	"Menu Item 1",
@@ -1642,6 +1655,7 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
 	v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u32_dyn_array, NULL);
 	v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u16_matrix, NULL);
 	v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u8_4d_array, NULL);
+	dev->pixel_array = v4l2_ctrl_new_custom(hdl_user_gen, &vivid_ctrl_u8_pixel_array, NULL);
 
 	if (dev->has_vid_cap) {
 		/* Image Processing Controls */

drivers/media/test-drivers/vivid/vivid-vid-cap.c

@@ -381,6 +381,7 @@ static enum tpg_pixel_aspect vivid_get_pixel_aspect(const struct vivid_dev *dev)
 void vivid_update_format_cap(struct vivid_dev *dev, bool keep_controls)
 {
 	struct v4l2_bt_timings *bt = &dev->dv_timings_cap[dev->input].bt;
+	u32 dims[V4L2_CTRL_MAX_DIMS] = {};
 	unsigned size;
 	u64 pixelclock;
 
@@ -459,6 +460,9 @@ void vivid_update_format_cap(struct vivid_dev *dev, bool keep_controls)
 	tpg_s_video_aspect(&dev->tpg, vivid_get_video_aspect(dev));
 	tpg_s_pixel_aspect(&dev->tpg, vivid_get_pixel_aspect(dev));
 	tpg_update_mv_step(&dev->tpg);
+	dims[0] = roundup(dev->src_rect.width, PIXEL_ARRAY_DIV);
+	dims[1] = roundup(dev->src_rect.height, PIXEL_ARRAY_DIV);
+	v4l2_ctrl_modify_dimensions(dev->pixel_array, dims);
 }
 
 /* Map the field to something that is valid for the current input */