[media] v4l: xilinx: Add Test Pattern Generator driver

The TPG generates multiple static or dynamic test patterns. The driver
currently hardcodes the pattern to the moving box pattern.

Signed-off-by: Christian Kohn <christian.kohn@xilinx.com>
Signed-off-by: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/devicetree/bindings/media/xilinx/xlnx,v-tpg.txt

@@ -0,0 +1,71 @@
+Xilinx Video Test Pattern Generator (TPG)
+-----------------------------------------
+
+Required properties:
+
+- compatible: Must contain at least one of
+
+    "xlnx,v-tpg-5.0" (TPG version 5.0)
+    "xlnx,v-tpg-6.0" (TPG version 6.0)
+
+  TPG versions backward-compatible with previous versions should list all
+  compatible versions in the newer to older order.
+
+- reg: Physical base address and length of the registers set for the device.
+
+- clocks: Reference to the video core clock.
+
+- xlnx,video-format, xlnx,video-width: Video format and width, as defined in
+  video.txt.
+
+- port: Video port, using the DT bindings defined in ../video-interfaces.txt.
+  The TPG has a single output port numbered 0.
+
+Optional properties:
+
+- xlnx,vtc: A phandle referencing the Video Timing Controller that generates
+  video timings for the TPG test patterns.
+
+- timing-gpios: Specifier for a GPIO that controls the timing mux at the TPG
+  input. The GPIO active level corresponds to the selection of VTC-generated
+  video timings.
+
+The xlnx,vtc and timing-gpios properties are mandatory when the TPG is
+synthesized with two ports and forbidden when synthesized with one port.
+
+Example:
+
+	tpg_0: tpg@40050000 {
+		compatible = "xlnx,v-tpg-6.0", "xlnx,v-tpg-5.0";
+		reg = <0x40050000 0x10000>;
+		clocks = <&clkc 15>;
+
+		xlnx,vtc = <&vtc_3>;
+		timing-gpios = <&ps7_gpio_0 55 GPIO_ACTIVE_LOW>;
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+
+				xlnx,video-format = <XVIP_VF_YUV_422>;
+				xlnx,video-width = <8>;
+
+				tpg_in: endpoint {
+					remote-endpoint = <&adv7611_out>;
+				};
+			};
+			port@1 {
+				reg = <1>;
+
+				xlnx,video-format = <XVIP_VF_YUV_422>;
+				xlnx,video-width = <8>;
+
+				tpg1_out: endpoint {
+					remote-endpoint = <&switch_in0>;
+				};
+			}:
+		};
+	};

MAINTAINERS

@@ -10826,6 +10826,7 @@ T:	git git://linuxtv.org/media_tree.git
 S:	Supported
 F:	Documentation/devicetree/bindings/media/xilinx/
 F:	drivers/media/platform/xilinx/
+F:	include/uapi/linux/xilinx-v4l2-controls.h
 
 XILLYBUS DRIVER
 M:	Eli Billauer <eli.billauer@gmail.com>

drivers/media/platform/xilinx/Kconfig

@@ -7,6 +7,13 @@ config VIDEO_XILINX
 
 if VIDEO_XILINX
 
+config VIDEO_XILINX_TPG
+	tristate "Xilinx Video Test Pattern Generator"
+	depends on VIDEO_XILINX
+	select VIDEO_XILINX_VTC
+	---help---
+	   Driver for the Xilinx Video Test Pattern Generator
+
 config VIDEO_XILINX_VTC
 	tristate "Xilinx Video Timing Controller"
 	depends on VIDEO_XILINX

drivers/media/platform/xilinx/Makefile

@@ -1,4 +1,5 @@
 xilinx-video-objs += xilinx-dma.o xilinx-vip.o xilinx-vipp.o
 
 obj-$(CONFIG_VIDEO_XILINX) += xilinx-video.o
+obj-$(CONFIG_VIDEO_XILINX_TPG) += xilinx-tpg.o
 obj-$(CONFIG_VIDEO_XILINX_VTC) += xilinx-vtc.o

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

@@ -0,0 +1,931 @@
+/*
+ * Xilinx Test Pattern Generator
+ *
+ * Copyright (C) 2013-2015 Ideas on Board
+ * Copyright (C) 2013-2015 Xilinx, Inc.
+ *
+ * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
+ *           Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/xilinx-v4l2-controls.h>
+
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-subdev.h>
+
+#include "xilinx-vip.h"
+#include "xilinx-vtc.h"
+
+#define XTPG_CTRL_STATUS_SLAVE_ERROR		(1 << 16)
+#define XTPG_CTRL_IRQ_SLAVE_ERROR		(1 << 16)
+
+#define XTPG_PATTERN_CONTROL			0x0100
+#define XTPG_PATTERN_MASK			(0xf << 0)
+#define XTPG_PATTERN_CONTROL_CROSS_HAIRS	(1 << 4)
+#define XTPG_PATTERN_CONTROL_MOVING_BOX		(1 << 5)
+#define XTPG_PATTERN_CONTROL_COLOR_MASK_SHIFT	6
+#define XTPG_PATTERN_CONTROL_COLOR_MASK_MASK	(0xf << 6)
+#define XTPG_PATTERN_CONTROL_STUCK_PIXEL	(1 << 9)
+#define XTPG_PATTERN_CONTROL_NOISE		(1 << 10)
+#define XTPG_PATTERN_CONTROL_MOTION		(1 << 12)
+#define XTPG_MOTION_SPEED			0x0104
+#define XTPG_CROSS_HAIRS			0x0108
+#define XTPG_CROSS_HAIRS_ROW_SHIFT		0
+#define XTPG_CROSS_HAIRS_ROW_MASK		(0xfff << 0)
+#define XTPG_CROSS_HAIRS_COLUMN_SHIFT		16
+#define XTPG_CROSS_HAIRS_COLUMN_MASK		(0xfff << 16)
+#define XTPG_ZPLATE_HOR_CONTROL			0x010c
+#define XTPG_ZPLATE_VER_CONTROL			0x0110
+#define XTPG_ZPLATE_START_SHIFT			0
+#define XTPG_ZPLATE_START_MASK			(0xffff << 0)
+#define XTPG_ZPLATE_SPEED_SHIFT			16
+#define XTPG_ZPLATE_SPEED_MASK			(0xffff << 16)
+#define XTPG_BOX_SIZE				0x0114
+#define XTPG_BOX_COLOR				0x0118
+#define XTPG_STUCK_PIXEL_THRESH			0x011c
+#define XTPG_NOISE_GAIN				0x0120
+#define XTPG_BAYER_PHASE			0x0124
+#define XTPG_BAYER_PHASE_RGGB			0
+#define XTPG_BAYER_PHASE_GRBG			1
+#define XTPG_BAYER_PHASE_GBRG			2
+#define XTPG_BAYER_PHASE_BGGR			3
+#define XTPG_BAYER_PHASE_OFF			4
+
+/*
+ * The minimum blanking value is one clock cycle for the front porch, one clock
+ * cycle for the sync pulse and one clock cycle for the back porch.
+ */
+#define XTPG_MIN_HBLANK			3
+#define XTPG_MAX_HBLANK			(XVTC_MAX_HSIZE - XVIP_MIN_WIDTH)
+#define XTPG_MIN_VBLANK			3
+#define XTPG_MAX_VBLANK			(XVTC_MAX_VSIZE - XVIP_MIN_HEIGHT)
+
+/**
+ * struct xtpg_device - Xilinx Test Pattern Generator device structure
+ * @xvip: Xilinx Video IP device
+ * @pads: media pads
+ * @npads: number of pads (1 or 2)
+ * @has_input: whether an input is connected to the sink pad
+ * @formats: active V4L2 media bus format for each pad
+ * @default_format: default V4L2 media bus format
+ * @vip_format: format information corresponding to the active format
+ * @bayer: boolean flag if TPG is set to any bayer format
+ * @ctrl_handler: control handler
+ * @hblank: horizontal blanking control
+ * @vblank: vertical blanking control
+ * @pattern: test pattern control
+ * @streaming: is the video stream active
+ * @vtc: video timing controller
+ * @vtmux_gpio: video timing mux GPIO
+ */
+struct xtpg_device {
+	struct xvip_device xvip;
+
+	struct media_pad pads[2];
+	unsigned int npads;
+	bool has_input;
+
+	struct v4l2_mbus_framefmt formats[2];
+	struct v4l2_mbus_framefmt default_format;
+	const struct xvip_video_format *vip_format;
+	bool bayer;
+
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_ctrl *hblank;
+	struct v4l2_ctrl *vblank;
+	struct v4l2_ctrl *pattern;
+	bool streaming;
+
+	struct xvtc_device *vtc;
+	struct gpio_desc *vtmux_gpio;
+};
+
+static inline struct xtpg_device *to_tpg(struct v4l2_subdev *subdev)
+{
+	return container_of(subdev, struct xtpg_device, xvip.subdev);
+}
+
+static u32 xtpg_get_bayer_phase(unsigned int code)
+{
+	switch (code) {
+	case MEDIA_BUS_FMT_SRGGB8_1X8:
+		return XTPG_BAYER_PHASE_RGGB;
+	case MEDIA_BUS_FMT_SGRBG8_1X8:
+		return XTPG_BAYER_PHASE_GRBG;
+	case MEDIA_BUS_FMT_SGBRG8_1X8:
+		return XTPG_BAYER_PHASE_GBRG;
+	case MEDIA_BUS_FMT_SBGGR8_1X8:
+		return XTPG_BAYER_PHASE_BGGR;
+	default:
+		return XTPG_BAYER_PHASE_OFF;
+	}
+}
+
+static void __xtpg_update_pattern_control(struct xtpg_device *xtpg,
+					  bool passthrough, bool pattern)
+{
+	u32 pattern_mask = (1 << (xtpg->pattern->maximum + 1)) - 1;
+
+	/*
+	 * If the TPG has no sink pad or no input connected to its sink pad
+	 * passthrough mode can't be enabled.
+	 */
+	if (xtpg->npads == 1 || !xtpg->has_input)
+		passthrough = false;
+
+	/* If passthrough mode is allowed unmask bit 0. */
+	if (passthrough)
+		pattern_mask &= ~1;
+
+	/* If test pattern mode is allowed unmask all other bits. */
+	if (pattern)
+		pattern_mask &= 1;
+
+	__v4l2_ctrl_modify_range(xtpg->pattern, 0, xtpg->pattern->maximum,
+				 pattern_mask, pattern ? 9 : 0);
+}
+
+static void xtpg_update_pattern_control(struct xtpg_device *xtpg,
+					bool passthrough, bool pattern)
+{
+	mutex_lock(xtpg->ctrl_handler.lock);
+	__xtpg_update_pattern_control(xtpg, passthrough, pattern);
+	mutex_unlock(xtpg->ctrl_handler.lock);
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Video Operations
+ */
+
+static int xtpg_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+	struct xtpg_device *xtpg = to_tpg(subdev);
+	unsigned int width = xtpg->formats[0].width;
+	unsigned int height = xtpg->formats[0].height;
+	bool passthrough;
+	u32 bayer_phase;
+
+	if (!enable) {
+		xvip_stop(&xtpg->xvip);
+		if (xtpg->vtc)
+			xvtc_generator_stop(xtpg->vtc);
+
+		xtpg_update_pattern_control(xtpg, true, true);
+		xtpg->streaming = false;
+		return 0;
+	}
+
+	xvip_set_frame_size(&xtpg->xvip, &xtpg->formats[0]);
+
+	if (xtpg->vtc) {
+		struct xvtc_config config = {
+			.hblank_start = width,
+			.hsync_start = width + 1,
+			.vblank_start = height,
+			.vsync_start = height + 1,
+		};
+		unsigned int htotal;
+		unsigned int vtotal;
+
+		htotal = min_t(unsigned int, XVTC_MAX_HSIZE,
+			       v4l2_ctrl_g_ctrl(xtpg->hblank) + width);
+		vtotal = min_t(unsigned int, XVTC_MAX_VSIZE,
+			       v4l2_ctrl_g_ctrl(xtpg->vblank) + height);
+
+		config.hsync_end = htotal - 1;
+		config.hsize = htotal;
+		config.vsync_end = vtotal - 1;
+		config.vsize = vtotal;
+
+		xvtc_generator_start(xtpg->vtc, &config);
+	}
+
+	/*
+	 * Configure the bayer phase and video timing mux based on the
+	 * operation mode (passthrough or test pattern generation). The test
+	 * pattern can be modified by the control set handler, we thus need to
+	 * take the control lock here to avoid races.
+	 */
+	mutex_lock(xtpg->ctrl_handler.lock);
+
+	xvip_clr_and_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+			 XTPG_PATTERN_MASK, xtpg->pattern->cur.val);
+
+	/*
+	 * Switching between passthrough and test pattern generation modes isn't
+	 * allowed during streaming, update the control range accordingly.
+	 */
+	passthrough = xtpg->pattern->cur.val == 0;
+	__xtpg_update_pattern_control(xtpg, passthrough, !passthrough);
+
+	xtpg->streaming = true;
+
+	mutex_unlock(xtpg->ctrl_handler.lock);
+
+	/*
+	 * For TPG v5.0, the bayer phase needs to be off for the pass through
+	 * mode, otherwise the external input would be subsampled.
+	 */
+	bayer_phase = passthrough ? XTPG_BAYER_PHASE_OFF
+		    : xtpg_get_bayer_phase(xtpg->formats[0].code);
+	xvip_write(&xtpg->xvip, XTPG_BAYER_PHASE, bayer_phase);
+
+	if (xtpg->vtmux_gpio)
+		gpiod_set_value_cansleep(xtpg->vtmux_gpio, !passthrough);
+
+	xvip_start(&xtpg->xvip);
+
+	return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Pad Operations
+ */
+
+static struct v4l2_mbus_framefmt *
+__xtpg_get_pad_format(struct xtpg_device *xtpg,
+		      struct v4l2_subdev_pad_config *cfg,
+		      unsigned int pad, u32 which)
+{
+	switch (which) {
+	case V4L2_SUBDEV_FORMAT_TRY:
+		return v4l2_subdev_get_try_format(&xtpg->xvip.subdev, cfg, pad);
+	case V4L2_SUBDEV_FORMAT_ACTIVE:
+		return &xtpg->formats[pad];
+	default:
+		return NULL;
+	}
+}
+
+static int xtpg_get_format(struct v4l2_subdev *subdev,
+			   struct v4l2_subdev_pad_config *cfg,
+			   struct v4l2_subdev_format *fmt)
+{
+	struct xtpg_device *xtpg = to_tpg(subdev);
+
+	fmt->format = *__xtpg_get_pad_format(xtpg, cfg, fmt->pad, fmt->which);
+
+	return 0;
+}
+
+static int xtpg_set_format(struct v4l2_subdev *subdev,
+			   struct v4l2_subdev_pad_config *cfg,
+			   struct v4l2_subdev_format *fmt)
+{
+	struct xtpg_device *xtpg = to_tpg(subdev);
+	struct v4l2_mbus_framefmt *__format;
+	u32 bayer_phase;
+
+	__format = __xtpg_get_pad_format(xtpg, cfg, fmt->pad, fmt->which);
+
+	/* In two pads mode the source pad format is always identical to the
+	 * sink pad format.
+	 */
+	if (xtpg->npads == 2 && fmt->pad == 1) {
+		fmt->format = *__format;
+		return 0;
+	}
+
+	/* Bayer phase is configurable at runtime */
+	if (xtpg->bayer) {
+		bayer_phase = xtpg_get_bayer_phase(fmt->format.code);
+		if (bayer_phase != XTPG_BAYER_PHASE_OFF)
+			__format->code = fmt->format.code;
+	}
+
+	xvip_set_format_size(__format, fmt);
+
+	fmt->format = *__format;
+
+	/* Propagate the format to the source pad. */
+	if (xtpg->npads == 2) {
+		__format = __xtpg_get_pad_format(xtpg, cfg, 1, fmt->which);
+		*__format = fmt->format;
+	}
+
+	return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 Subdevice Operations
+ */
+
+static int xtpg_enum_frame_size(struct v4l2_subdev *subdev,
+				struct v4l2_subdev_pad_config *cfg,
+				struct v4l2_subdev_frame_size_enum *fse)
+{
+	struct v4l2_mbus_framefmt *format;
+
+	format = v4l2_subdev_get_try_format(subdev, cfg, fse->pad);
+
+	if (fse->index || fse->code != format->code)
+		return -EINVAL;
+
+	/* Min / max values for pad 0 is always fixed in both one and two pads
+	 * modes. In two pads mode, the source pad(= 1) size is identical to
+	 * the sink pad size */
+	if (fse->pad == 0) {
+		fse->min_width = XVIP_MIN_WIDTH;
+		fse->max_width = XVIP_MAX_WIDTH;
+		fse->min_height = XVIP_MIN_HEIGHT;
+		fse->max_height = XVIP_MAX_HEIGHT;
+	} else {
+		fse->min_width = format->width;
+		fse->max_width = format->width;
+		fse->min_height = format->height;
+		fse->max_height = format->height;
+	}
+
+	return 0;
+}
+
+static int xtpg_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+	struct xtpg_device *xtpg = to_tpg(subdev);
+	struct v4l2_mbus_framefmt *format;
+
+	format = v4l2_subdev_get_try_format(subdev, fh->pad, 0);
+	*format = xtpg->default_format;
+
+	if (xtpg->npads == 2) {
+		format = v4l2_subdev_get_try_format(subdev, fh->pad, 1);
+		*format = xtpg->default_format;
+	}
+
+	return 0;
+}
+
+static int xtpg_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
+{
+	return 0;
+}
+
+static int xtpg_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct xtpg_device *xtpg = container_of(ctrl->handler,
+						struct xtpg_device,
+						ctrl_handler);
+	switch (ctrl->id) {
+	case V4L2_CID_TEST_PATTERN:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+				 XTPG_PATTERN_MASK, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_CROSS_HAIRS:
+		xvip_clr_or_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+				XTPG_PATTERN_CONTROL_CROSS_HAIRS, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_MOVING_BOX:
+		xvip_clr_or_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+				XTPG_PATTERN_CONTROL_MOVING_BOX, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_COLOR_MASK:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+				 XTPG_PATTERN_CONTROL_COLOR_MASK_MASK,
+				 ctrl->val <<
+				 XTPG_PATTERN_CONTROL_COLOR_MASK_SHIFT);
+		return 0;
+	case V4L2_CID_XILINX_TPG_STUCK_PIXEL:
+		xvip_clr_or_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+				XTPG_PATTERN_CONTROL_STUCK_PIXEL, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_NOISE:
+		xvip_clr_or_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+				XTPG_PATTERN_CONTROL_NOISE, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_MOTION:
+		xvip_clr_or_set(&xtpg->xvip, XTPG_PATTERN_CONTROL,
+				XTPG_PATTERN_CONTROL_MOTION, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_MOTION_SPEED:
+		xvip_write(&xtpg->xvip, XTPG_MOTION_SPEED, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_CROSS_HAIR_ROW:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_CROSS_HAIRS,
+				 XTPG_CROSS_HAIRS_ROW_MASK,
+				 ctrl->val << XTPG_CROSS_HAIRS_ROW_SHIFT);
+		return 0;
+	case V4L2_CID_XILINX_TPG_CROSS_HAIR_COLUMN:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_CROSS_HAIRS,
+				 XTPG_CROSS_HAIRS_COLUMN_MASK,
+				 ctrl->val << XTPG_CROSS_HAIRS_COLUMN_SHIFT);
+		return 0;
+	case V4L2_CID_XILINX_TPG_ZPLATE_HOR_START:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_ZPLATE_HOR_CONTROL,
+				 XTPG_ZPLATE_START_MASK,
+				 ctrl->val << XTPG_ZPLATE_START_SHIFT);
+		return 0;
+	case V4L2_CID_XILINX_TPG_ZPLATE_HOR_SPEED:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_ZPLATE_HOR_CONTROL,
+				 XTPG_ZPLATE_SPEED_MASK,
+				 ctrl->val << XTPG_ZPLATE_SPEED_SHIFT);
+		return 0;
+	case V4L2_CID_XILINX_TPG_ZPLATE_VER_START:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_ZPLATE_VER_CONTROL,
+				 XTPG_ZPLATE_START_MASK,
+				 ctrl->val << XTPG_ZPLATE_START_SHIFT);
+		return 0;
+	case V4L2_CID_XILINX_TPG_ZPLATE_VER_SPEED:
+		xvip_clr_and_set(&xtpg->xvip, XTPG_ZPLATE_VER_CONTROL,
+				 XTPG_ZPLATE_SPEED_MASK,
+				 ctrl->val << XTPG_ZPLATE_SPEED_SHIFT);
+		return 0;
+	case V4L2_CID_XILINX_TPG_BOX_SIZE:
+		xvip_write(&xtpg->xvip, XTPG_BOX_SIZE, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_BOX_COLOR:
+		xvip_write(&xtpg->xvip, XTPG_BOX_COLOR, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_STUCK_PIXEL_THRESH:
+		xvip_write(&xtpg->xvip, XTPG_STUCK_PIXEL_THRESH, ctrl->val);
+		return 0;
+	case V4L2_CID_XILINX_TPG_NOISE_GAIN:
+		xvip_write(&xtpg->xvip, XTPG_NOISE_GAIN, ctrl->val);
+		return 0;
+	}
+
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops xtpg_ctrl_ops = {
+	.s_ctrl	= xtpg_s_ctrl,
+};
+
+static struct v4l2_subdev_core_ops xtpg_core_ops = {
+};
+
+static struct v4l2_subdev_video_ops xtpg_video_ops = {
+	.s_stream = xtpg_s_stream,
+};
+
+static struct v4l2_subdev_pad_ops xtpg_pad_ops = {
+	.enum_mbus_code		= xvip_enum_mbus_code,
+	.enum_frame_size	= xtpg_enum_frame_size,
+	.get_fmt		= xtpg_get_format,
+	.set_fmt		= xtpg_set_format,
+};
+
+static struct v4l2_subdev_ops xtpg_ops = {
+	.core   = &xtpg_core_ops,
+	.video  = &xtpg_video_ops,
+	.pad    = &xtpg_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops xtpg_internal_ops = {
+	.open	= xtpg_open,
+	.close	= xtpg_close,
+};
+
+/*
+ * Control Config
+ */
+
+static const char *const xtpg_pattern_strings[] = {
+	"Passthrough",
+	"Horizontal Ramp",
+	"Vertical Ramp",
+	"Temporal Ramp",
+	"Solid Red",
+	"Solid Green",
+	"Solid Blue",
+	"Solid Black",
+	"Solid White",
+	"Color Bars",
+	"Zone Plate",
+	"Tartan Color Bars",
+	"Cross Hatch",
+	"None",
+	"Vertical/Horizontal Ramps",
+	"Black/White Checker Board",
+};
+
+static struct v4l2_ctrl_config xtpg_ctrls[] = {
+	{
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_CROSS_HAIRS,
+		.name	= "Test Pattern: Cross Hairs",
+		.type	= V4L2_CTRL_TYPE_BOOLEAN,
+		.min	= false,
+		.max	= true,
+		.step	= 1,
+		.def	= 0,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_MOVING_BOX,
+		.name	= "Test Pattern: Moving Box",
+		.type	= V4L2_CTRL_TYPE_BOOLEAN,
+		.min	= false,
+		.max	= true,
+		.step	= 1,
+		.def	= 0,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_COLOR_MASK,
+		.name	= "Test Pattern: Color Mask",
+		.type	= V4L2_CTRL_TYPE_BITMASK,
+		.min	= 0,
+		.max	= 0xf,
+		.def	= 0,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_STUCK_PIXEL,
+		.name	= "Test Pattern: Stuck Pixel",
+		.type	= V4L2_CTRL_TYPE_BOOLEAN,
+		.min	= false,
+		.max	= true,
+		.step	= 1,
+		.def	= 0,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_NOISE,
+		.name	= "Test Pattern: Noise",
+		.type	= V4L2_CTRL_TYPE_BOOLEAN,
+		.min	= false,
+		.max	= true,
+		.step	= 1,
+		.def	= 0,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_MOTION,
+		.name	= "Test Pattern: Motion",
+		.type	= V4L2_CTRL_TYPE_BOOLEAN,
+		.min	= false,
+		.max	= true,
+		.step	= 1,
+		.def	= 0,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_MOTION_SPEED,
+		.name	= "Test Pattern: Motion Speed",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 8) - 1,
+		.step	= 1,
+		.def	= 4,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_CROSS_HAIR_ROW,
+		.name	= "Test Pattern: Cross Hairs Row",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 12) - 1,
+		.step	= 1,
+		.def	= 0x64,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_CROSS_HAIR_COLUMN,
+		.name	= "Test Pattern: Cross Hairs Column",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 12) - 1,
+		.step	= 1,
+		.def	= 0x64,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_ZPLATE_HOR_START,
+		.name	= "Test Pattern: Zplate Horizontal Start Pos",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 16) - 1,
+		.step	= 1,
+		.def	= 0x1e,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_ZPLATE_HOR_SPEED,
+		.name	= "Test Pattern: Zplate Horizontal Speed",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 16) - 1,
+		.step	= 1,
+		.def	= 0,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_ZPLATE_VER_START,
+		.name	= "Test Pattern: Zplate Vertical Start Pos",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 16) - 1,
+		.step	= 1,
+		.def	= 1,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_ZPLATE_VER_SPEED,
+		.name	= "Test Pattern: Zplate Vertical Speed",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 16) - 1,
+		.step	= 1,
+		.def	= 0,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_BOX_SIZE,
+		.name	= "Test Pattern: Box Size",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 12) - 1,
+		.step	= 1,
+		.def	= 0x32,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_BOX_COLOR,
+		.name	= "Test Pattern: Box Color(RGB)",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 24) - 1,
+		.step	= 1,
+		.def	= 0,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_STUCK_PIXEL_THRESH,
+		.name	= "Test Pattern: Stuck Pixel threshold",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 16) - 1,
+		.step	= 1,
+		.def	= 0,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	}, {
+		.ops	= &xtpg_ctrl_ops,
+		.id	= V4L2_CID_XILINX_TPG_NOISE_GAIN,
+		.name	= "Test Pattern: Noise Gain",
+		.type	= V4L2_CTRL_TYPE_INTEGER,
+		.min	= 0,
+		.max	= (1 << 8) - 1,
+		.step	= 1,
+		.def	= 0,
+		.flags	= V4L2_CTRL_FLAG_SLIDER,
+	},
+};
+
+/* -----------------------------------------------------------------------------
+ * Media Operations
+ */
+
+static const struct media_entity_operations xtpg_media_ops = {
+	.link_validate = v4l2_subdev_link_validate,
+};
+
+/* -----------------------------------------------------------------------------
+ * Power Management
+ */
+
+static int __maybe_unused xtpg_pm_suspend(struct device *dev)
+{
+	struct xtpg_device *xtpg = dev_get_drvdata(dev);
+
+	xvip_suspend(&xtpg->xvip);
+
+	return 0;
+}
+
+static int __maybe_unused xtpg_pm_resume(struct device *dev)
+{
+	struct xtpg_device *xtpg = dev_get_drvdata(dev);
+
+	xvip_resume(&xtpg->xvip);
+
+	return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Platform Device Driver
+ */
+
+static int xtpg_parse_of(struct xtpg_device *xtpg)
+{
+	struct device *dev = xtpg->xvip.dev;
+	struct device_node *node = xtpg->xvip.dev->of_node;
+	struct device_node *ports;
+	struct device_node *port;
+	unsigned int nports = 0;
+	bool has_endpoint = false;
+
+	ports = of_get_child_by_name(node, "ports");
+	if (ports == NULL)
+		ports = node;
+
+	for_each_child_of_node(ports, port) {
+		const struct xvip_video_format *format;
+		struct device_node *endpoint;
+
+		if (!port->name || of_node_cmp(port->name, "port"))
+			continue;
+
+		format = xvip_of_get_format(port);
+		if (IS_ERR(format)) {
+			dev_err(dev, "invalid format in DT");
+			return PTR_ERR(format);
+		}
+
+		/* Get and check the format description */
+		if (!xtpg->vip_format) {
+			xtpg->vip_format = format;
+		} else if (xtpg->vip_format != format) {
+			dev_err(dev, "in/out format mismatch in DT");
+			return -EINVAL;
+		}
+
+		if (nports == 0) {
+			endpoint = of_get_next_child(port, NULL);
+			if (endpoint)
+				has_endpoint = true;
+			of_node_put(endpoint);
+		}
+
+		/* Count the number of ports. */
+		nports++;
+	}
+
+	if (nports != 1 && nports != 2) {
+		dev_err(dev, "invalid number of ports %u\n", nports);
+		return -EINVAL;
+	}
+
+	xtpg->npads = nports;
+	if (nports == 2 && has_endpoint)
+		xtpg->has_input = true;
+
+	return 0;
+}
+
+static int xtpg_probe(struct platform_device *pdev)
+{
+	struct v4l2_subdev *subdev;
+	struct xtpg_device *xtpg;
+	u32 i, bayer_phase;
+	int ret;
+
+	xtpg = devm_kzalloc(&pdev->dev, sizeof(*xtpg), GFP_KERNEL);
+	if (!xtpg)
+		return -ENOMEM;
+
+	xtpg->xvip.dev = &pdev->dev;
+
+	ret = xtpg_parse_of(xtpg);
+	if (ret < 0)
+		return ret;
+
+	ret = xvip_init_resources(&xtpg->xvip);
+	if (ret < 0)
+		return ret;
+
+	xtpg->vtmux_gpio = devm_gpiod_get_optional(&pdev->dev, "timing",
+						   GPIOD_OUT_HIGH);
+	if (IS_ERR(xtpg->vtmux_gpio)) {
+		ret = PTR_ERR(xtpg->vtmux_gpio);
+		goto error_resource;
+	}
+
+	xtpg->vtc = xvtc_of_get(pdev->dev.of_node);
+	if (IS_ERR(xtpg->vtc)) {
+		ret = PTR_ERR(xtpg->vtc);
+		goto error_resource;
+	}
+
+	/* Reset and initialize the core */
+	xvip_reset(&xtpg->xvip);
+
+	/* Initialize V4L2 subdevice and media entity. Pad numbers depend on the
+	 * number of pads.
+	 */
+	if (xtpg->npads == 2) {
+		xtpg->pads[0].flags = MEDIA_PAD_FL_SINK;
+		xtpg->pads[1].flags = MEDIA_PAD_FL_SOURCE;
+	} else {
+		xtpg->pads[0].flags = MEDIA_PAD_FL_SOURCE;
+	}
+
+	/* Initialize the default format */
+	xtpg->default_format.code = xtpg->vip_format->code;
+	xtpg->default_format.field = V4L2_FIELD_NONE;
+	xtpg->default_format.colorspace = V4L2_COLORSPACE_SRGB;
+	xvip_get_frame_size(&xtpg->xvip, &xtpg->default_format);
+
+	bayer_phase = xtpg_get_bayer_phase(xtpg->vip_format->code);
+	if (bayer_phase != XTPG_BAYER_PHASE_OFF)
+		xtpg->bayer = true;
+
+	xtpg->formats[0] = xtpg->default_format;
+	if (xtpg->npads == 2)
+		xtpg->formats[1] = xtpg->default_format;
+
+	/* Initialize V4L2 subdevice and media entity */
+	subdev = &xtpg->xvip.subdev;
+	v4l2_subdev_init(subdev, &xtpg_ops);
+	subdev->dev = &pdev->dev;
+	subdev->internal_ops = &xtpg_internal_ops;
+	strlcpy(subdev->name, dev_name(&pdev->dev), sizeof(subdev->name));
+	v4l2_set_subdevdata(subdev, xtpg);
+	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	subdev->entity.ops = &xtpg_media_ops;
+
+	ret = media_entity_init(&subdev->entity, xtpg->npads, xtpg->pads, 0);
+	if (ret < 0)
+		goto error;
+
+	v4l2_ctrl_handler_init(&xtpg->ctrl_handler, 3 + ARRAY_SIZE(xtpg_ctrls));
+
+	xtpg->vblank = v4l2_ctrl_new_std(&xtpg->ctrl_handler, &xtpg_ctrl_ops,
+					 V4L2_CID_VBLANK, XTPG_MIN_VBLANK,
+					 XTPG_MAX_VBLANK, 1, 100);
+	xtpg->hblank = v4l2_ctrl_new_std(&xtpg->ctrl_handler, &xtpg_ctrl_ops,
+					 V4L2_CID_HBLANK, XTPG_MIN_HBLANK,
+					 XTPG_MAX_HBLANK, 1, 100);
+	xtpg->pattern = v4l2_ctrl_new_std_menu_items(&xtpg->ctrl_handler,
+					&xtpg_ctrl_ops, V4L2_CID_TEST_PATTERN,
+					ARRAY_SIZE(xtpg_pattern_strings) - 1,
+					1, 9, xtpg_pattern_strings);
+
+	for (i = 0; i < ARRAY_SIZE(xtpg_ctrls); i++)
+		v4l2_ctrl_new_custom(&xtpg->ctrl_handler, &xtpg_ctrls[i], NULL);
+
+	if (xtpg->ctrl_handler.error) {
+		dev_err(&pdev->dev, "failed to add controls\n");
+		ret = xtpg->ctrl_handler.error;
+		goto error;
+	}
+	subdev->ctrl_handler = &xtpg->ctrl_handler;
+
+	xtpg_update_pattern_control(xtpg, true, true);
+
+	ret = v4l2_ctrl_handler_setup(&xtpg->ctrl_handler);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to set controls\n");
+		goto error;
+	}
+
+	platform_set_drvdata(pdev, xtpg);
+
+	xvip_print_version(&xtpg->xvip);
+
+	ret = v4l2_async_register_subdev(subdev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to register subdev\n");
+		goto error;
+	}
+
+	return 0;
+
+error:
+	v4l2_ctrl_handler_free(&xtpg->ctrl_handler);
+	media_entity_cleanup(&subdev->entity);
+	xvtc_put(xtpg->vtc);
+error_resource:
+	xvip_cleanup_resources(&xtpg->xvip);
+	return ret;
+}
+
+static int xtpg_remove(struct platform_device *pdev)
+{
+	struct xtpg_device *xtpg = platform_get_drvdata(pdev);
+	struct v4l2_subdev *subdev = &xtpg->xvip.subdev;
+
+	v4l2_async_unregister_subdev(subdev);
+	v4l2_ctrl_handler_free(&xtpg->ctrl_handler);
+	media_entity_cleanup(&subdev->entity);
+
+	xvip_cleanup_resources(&xtpg->xvip);
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(xtpg_pm_ops, xtpg_pm_suspend, xtpg_pm_resume);
+
+static const struct of_device_id xtpg_of_id_table[] = {
+	{ .compatible = "xlnx,v-tpg-5.0" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, xtpg_of_id_table);
+
+static struct platform_driver xtpg_driver = {
+	.driver = {
+		.name		= "xilinx-tpg",
+		.pm		= &xtpg_pm_ops,
+		.of_match_table	= xtpg_of_id_table,
+	},
+	.probe			= xtpg_probe,
+	.remove			= xtpg_remove,
+};
+
+module_platform_driver(xtpg_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("Xilinx Test Pattern Generator Driver");
+MODULE_LICENSE("GPL v2");

include/uapi/linux/Kbuild

@@ -446,5 +446,6 @@ header-y += wireless.h
 header-y += x25.h
 header-y += xattr.h
 header-y += xfrm.h
+header-y += xilinx-v4l2-controls.h
 header-y += zorro.h
 header-y += zorro_ids.h

include/uapi/linux/xilinx-v4l2-controls.h

@@ -0,0 +1,73 @@
+/*
+ * Xilinx Controls Header
+ *
+ * Copyright (C) 2013-2015 Ideas on Board
+ * Copyright (C) 2013-2015 Xilinx, Inc.
+ *
+ * Contacts: Hyun Kwon <hyun.kwon@xilinx.com>
+ *           Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef __UAPI_XILINX_V4L2_CONTROLS_H__
+#define __UAPI_XILINX_V4L2_CONTROLS_H__
+
+#include <linux/v4l2-controls.h>
+
+#define V4L2_CID_XILINX_OFFSET	0xc000
+#define V4L2_CID_XILINX_BASE	(V4L2_CID_USER_BASE + V4L2_CID_XILINX_OFFSET)
+
+/*
+ * Private Controls for Xilinx Video IPs
+ */
+
+/*
+ * Xilinx TPG Video IP
+ */
+
+#define V4L2_CID_XILINX_TPG			(V4L2_CID_USER_BASE + 0xc000)
+
+/* Draw cross hairs */
+#define V4L2_CID_XILINX_TPG_CROSS_HAIRS		(V4L2_CID_XILINX_TPG + 1)
+/* Enable a moving box */
+#define V4L2_CID_XILINX_TPG_MOVING_BOX		(V4L2_CID_XILINX_TPG + 2)
+/* Mask out a color component */
+#define V4L2_CID_XILINX_TPG_COLOR_MASK		(V4L2_CID_XILINX_TPG + 3)
+/* Enable a stuck pixel feature */
+#define V4L2_CID_XILINX_TPG_STUCK_PIXEL		(V4L2_CID_XILINX_TPG + 4)
+/* Enable a noisy output */
+#define V4L2_CID_XILINX_TPG_NOISE		(V4L2_CID_XILINX_TPG + 5)
+/* Enable the motion feature */
+#define V4L2_CID_XILINX_TPG_MOTION		(V4L2_CID_XILINX_TPG + 6)
+/* Configure the motion speed of moving patterns */
+#define V4L2_CID_XILINX_TPG_MOTION_SPEED	(V4L2_CID_XILINX_TPG + 7)
+/* The row of horizontal cross hair location */
+#define V4L2_CID_XILINX_TPG_CROSS_HAIR_ROW	(V4L2_CID_XILINX_TPG + 8)
+/* The colum of vertical cross hair location */
+#define V4L2_CID_XILINX_TPG_CROSS_HAIR_COLUMN	(V4L2_CID_XILINX_TPG + 9)
+/* Set starting point of sine wave for horizontal component */
+#define V4L2_CID_XILINX_TPG_ZPLATE_HOR_START	(V4L2_CID_XILINX_TPG + 10)
+/* Set speed of the horizontal component */
+#define V4L2_CID_XILINX_TPG_ZPLATE_HOR_SPEED	(V4L2_CID_XILINX_TPG + 11)
+/* Set starting point of sine wave for vertical component */
+#define V4L2_CID_XILINX_TPG_ZPLATE_VER_START	(V4L2_CID_XILINX_TPG + 12)
+/* Set speed of the vertical component */
+#define V4L2_CID_XILINX_TPG_ZPLATE_VER_SPEED	(V4L2_CID_XILINX_TPG + 13)
+/* Moving box size */
+#define V4L2_CID_XILINX_TPG_BOX_SIZE		(V4L2_CID_XILINX_TPG + 14)
+/* Moving box color */
+#define V4L2_CID_XILINX_TPG_BOX_COLOR		(V4L2_CID_XILINX_TPG + 15)
+/* Upper limit count of generated stuck pixels */
+#define V4L2_CID_XILINX_TPG_STUCK_PIXEL_THRESH	(V4L2_CID_XILINX_TPG + 16)
+/* Noise level */
+#define V4L2_CID_XILINX_TPG_NOISE_GAIN		(V4L2_CID_XILINX_TPG + 17)
+
+#endif /* __UAPI_XILINX_V4L2_CONTROLS_H__ */