On 07/10/16 17:00, Philipp Zabel wrote:
From: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Add video4linux API routines common to drivers for units that
accept or provide video data via the i.MX IPU IDMAC channels,
such as capture, mem2mem scaler or deinterlacer drivers.
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
---
drivers/media/platform/imx/Kconfig | 3 +
drivers/media/platform/imx/Makefile | 1 +
drivers/media/platform/imx/imx-ipu.c | 321 +++++++++++++++++++++++++++++++++++
drivers/media/platform/imx/imx-ipu.h | 34 ++++
4 files changed, 359 insertions(+)
create mode 100644 drivers/media/platform/imx/imx-ipu.c
create mode 100644 drivers/media/platform/imx/imx-ipu.h
diff --git a/drivers/media/platform/imx/Kconfig b/drivers/media/platform/imx/Kconfig
index 3bd699c..1662bb0b 100644
--- a/drivers/media/platform/imx/Kconfig
+++ b/drivers/media/platform/imx/Kconfig
@@ -5,3 +5,6 @@ config MEDIA_IMX
---help---
This driver provides a SoC wide media controller device that all
multimedia components in i.MX5 and i.MX6 SoCs can register with.
+
+config VIDEO_IMX_IPU_COMMON
+ tristate
diff --git a/drivers/media/platform/imx/Makefile b/drivers/media/platform/imx/Makefile
index 74bed76..0ba601a 100644
--- a/drivers/media/platform/imx/Makefile
+++ b/drivers/media/platform/imx/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_MEDIA_IMX) += imx-media.o
+obj-$(CONFIG_VIDEO_IMX_IPU_COMMON) += imx-ipu.o
diff --git a/drivers/media/platform/imx/imx-ipu.c b/drivers/media/platform/imx/imx-ipu.c
new file mode 100644
index 0000000..da1deb0
--- /dev/null
+++ b/drivers/media/platform/imx/imx-ipu.c
@@ -0,0 +1,321 @@
+/*
+ * i.MX IPUv3 common v4l2 support
+ *
+ * Copyright (C) 2011 Pengutronix, Sascha Hauer <kernel@xxxxxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/module.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ioctl.h>
+
+#include "imx-ipu.h"
+
+/*
+ * These formats are in order of preference: interleaved YUV first,
+ * because those are the most bandwidth efficient, followed by
+ * chroma-interleaved formats, and planar formats last.
+ * In each category, YUV 4:2:0 may be preferrable to 4:2:2 for bandwidth
+ * reasons, if the IDMAC channel supports double read/write reduction
+ * (all write channels, VDIC read channels).
+ */
+static struct ipu_fmt ipu_fmt_yuv[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .bytes_per_pixel = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .bytes_per_pixel = 2,
+ }, {
+ .fourcc = V4L2_PIX_FMT_NV12,
+ .bytes_per_pixel = 1,
+ }, {
+ .fourcc = V4L2_PIX_FMT_NV16,
+ .bytes_per_pixel = 1,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YUV420,
+ .bytes_per_pixel = 1,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YVU420,
+ .bytes_per_pixel = 1,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YUV422P,
+ .bytes_per_pixel = 1,
+ },
+};
+
+static struct ipu_fmt ipu_fmt_rgb[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_RGB32,
+ .bytes_per_pixel = 4,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB24,
+ .bytes_per_pixel = 3,
+ }, {
+ .fourcc = V4L2_PIX_FMT_BGR24,
+ .bytes_per_pixel = 3,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .bytes_per_pixel = 2,
+ },
+ {
+ .fourcc = V4L2_PIX_FMT_BGR32,
+ .bytes_per_pixel = 4,
+ },
+};
Maybe a trivial comment, but is it worthwhile to constify these two?
Regards,
Ian
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