1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/media/pci/mgb4/mgb4_io.h b/drivers/media/pci/mgb4/mgb4_io.h
new file mode 100644
index 000000000000..dd8696d7df31
--- /dev/null
+++ b/drivers/media/pci/mgb4/mgb4_io.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021-2022 Digiteq Automotive
+ *     author: Martin Tuma <martin.tuma@digiteqautomotive.com>
+ */
+
+#ifndef __MGB4_IO_H__
+#define __MGB4_IO_H__
+
+#include <linux/math64.h>
+#include <media/v4l2-dev.h>
+#include "mgb4_core.h"
+
+/* Register access error indication */
+#define MGB4_ERR_NO_REG        0xFFFFFFFE
+/* Frame buffer addresses greater than 0xFFFFFFFA indicate HW errors */
+#define MGB4_ERR_QUEUE_TIMEOUT 0xFFFFFFFD
+#define MGB4_ERR_QUEUE_EMPTY   0xFFFFFFFC
+#define MGB4_ERR_QUEUE_FULL    0xFFFFFFFB
+
+#define MGB4_PERIOD(numerator, denominator) \
+	((u32)div_u64((MGB4_HW_FREQ * (u64)(numerator)), (denominator)))
+
+struct mgb4_frame_buffer {
+	struct vb2_v4l2_buffer vb;
+	struct list_head list;
+};
+
+static inline struct mgb4_frame_buffer *to_frame_buffer(struct vb2_v4l2_buffer *vbuf)
+{
+	return container_of(vbuf, struct mgb4_frame_buffer, vb);
+}
+
+static inline bool has_yuv_and_timeperframe(struct mgb4_regs *video)
+{
+	u32 status = mgb4_read_reg(video, 0xD0);
+
+	return (status & (1U << 8));
+}
+
+#define has_yuv(video) has_yuv_and_timeperframe(video)
+#define has_timeperframe(video) has_yuv_and_timeperframe(video)
+
+static inline u32 pixel_size(struct v4l2_dv_timings *timings)
+{
+	struct v4l2_bt_timings *bt = &timings->bt;
+
+	u32 height = bt->height + bt->vfrontporch + bt->vsync + bt->vbackporch;
+	u32 width = bt->width + bt->hfrontporch + bt->hsync + bt->hbackporch;
+
+	return width * height;
+}
+
+#endif