drivers/media/platform/vsp1/vsp1_wpf.c - vendor/opensource/backports - Git at Google

 /*
  * vsp1_wpf.c  --  R-Car VSP1 Write Pixel Formatter
  *
  * Copyright (C) 2013-2014 Renesas Electronics Corporation
  *
  * Contact: 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 as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  */

 #include <linux/device.h>

 #include <media/v4l2-subdev.h>

 #include "vsp1.h"
 #include "vsp1_rwpf.h"
 #include "vsp1_video.h"

 #define WPF_MAX_WIDTH				2048
 #define WPF_MAX_HEIGHT				2048

 /* -----------------------------------------------------------------------------
  * Device Access
  */

 static inline u32 vsp1_wpf_read(struct vsp1_rwpf *wpf, u32 reg)
 {
 	return vsp1_read(wpf->entity.vsp1,
 			 reg + wpf->entity.index * VI6_WPF_OFFSET);
 }

 static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data)
 {
 	vsp1_write(wpf->entity.vsp1,
 		   reg + wpf->entity.index * VI6_WPF_OFFSET, data);
 }

 /* -----------------------------------------------------------------------------
  * Controls
  */

 static int wpf_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct vsp1_rwpf *wpf =
 		container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 	u32 value;

 	if (!vsp1_entity_is_streaming(&wpf->entity))
 		return 0;

 	switch (ctrl->id) {
 	case V4L2_CID_ALPHA_COMPONENT:
 		value = vsp1_wpf_read(wpf, VI6_WPF_OUTFMT);
 		value &= ~VI6_WPF_OUTFMT_PDV_MASK;
 		value |= ctrl->val << VI6_WPF_OUTFMT_PDV_SHIFT;
 		vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, value);
 		break;
 	}

 	return 0;
 }

 static const struct v4l2_ctrl_ops wpf_ctrl_ops = {
 	.s_ctrl = wpf_s_ctrl,
 };

 /* -----------------------------------------------------------------------------
  * V4L2 Subdevice Core Operations
  */

 static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
 {
 	struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
 	struct vsp1_rwpf *wpf = to_rwpf(subdev);
 	struct vsp1_device *vsp1 = wpf->entity.vsp1;
 	const struct v4l2_rect *crop = &wpf->crop;
 	unsigned int i;
 	u32 srcrpf = 0;
 	u32 outfmt = 0;
 	int ret;

 	ret = vsp1_entity_set_streaming(&wpf->entity, enable);
 	if (ret < 0)
 		return ret;

 	if (!enable) {
 		vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
 		vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, 0);
 		return 0;
 	}

 	/* Sources. If the pipeline has a single input and BRU is not used,
 	 * configure it as the master layer. Otherwise configure all
 	 * inputs as sub-layers and select the virtual RPF as the master
 	 * layer.
 	 */
 	for (i = 0; i < pipe->num_inputs; ++i) {
 		struct vsp1_rwpf *input = pipe->inputs[i];

 		srcrpf |= (!pipe->bru && pipe->num_inputs == 1)
 			? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
 			: VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
 	}

 	if (pipe->bru || pipe->num_inputs > 1)
 		srcrpf |= VI6_WPF_SRCRPF_VIRACT_MST;

 	vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);

 	/* Destination stride. */
 	if (!pipe->lif) {
 		struct v4l2_pix_format_mplane *format = &wpf->video.format;

 		vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
 			       format->plane_fmt[0].bytesperline);
 		if (format->num_planes > 1)
 			vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
 				       format->plane_fmt[1].bytesperline);
 	}

 	vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN |
 		       (crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) |
 		       (crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
 	vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN |
 		       (crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) |
 		       (crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));

 	/* Format */
 	if (!pipe->lif) {
 		const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;

 		outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;

 		if (fmtinfo->alpha)
 			outfmt |= VI6_WPF_OUTFMT_PXA;
 		if (fmtinfo->swap_yc)
 			outfmt |= VI6_WPF_OUTFMT_SPYCS;
 		if (fmtinfo->swap_uv)
 			outfmt |= VI6_WPF_OUTFMT_SPUVS;

 		vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
 	}

 	if (wpf->entity.formats[RWPF_PAD_SINK].code !=
 	    wpf->entity.formats[RWPF_PAD_SOURCE].code)
 		outfmt |= VI6_WPF_OUTFMT_CSC;

 	/* Take the control handler lock to ensure that the PDV value won't be
 	 * changed behind our back by a set control operation.
 	 */
 	mutex_lock(wpf->ctrls.lock);
 	outfmt |= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK;
 	vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
 	mutex_unlock(wpf->ctrls.lock);

 	vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
 		   VI6_DPR_WPF_FPORCH_FP_WPFN);

 	vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);

 	/* Enable interrupts */
 	vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
 	vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
 		   VI6_WFP_IRQ_ENB_FREE);

 	return 0;
 }

 /* -----------------------------------------------------------------------------
  * V4L2 Subdevice Operations
  */

 static struct v4l2_subdev_video_ops wpf_video_ops = {
 	.s_stream = wpf_s_stream,
 };

 static struct v4l2_subdev_pad_ops wpf_pad_ops = {
 	.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
 	.enum_frame_size = vsp1_rwpf_enum_frame_size,
 	.get_fmt = vsp1_rwpf_get_format,
 	.set_fmt = vsp1_rwpf_set_format,
 	.get_selection = vsp1_rwpf_get_selection,
 	.set_selection = vsp1_rwpf_set_selection,
 };

 static struct v4l2_subdev_ops wpf_ops = {
 	.video	= &wpf_video_ops,
 	.pad    = &wpf_pad_ops,
 };

 /* -----------------------------------------------------------------------------
  * Video Device Operations
  */

 static void wpf_vdev_queue(struct vsp1_video *video,
 			   struct vsp1_video_buffer *buf)
 {
 	struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);

 	vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
 	if (buf->buf.vb2_buf.num_planes > 1)
 		vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
 	if (buf->buf.vb2_buf.num_planes > 2)
 		vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
 }

 static const struct vsp1_video_operations wpf_vdev_ops = {
 	.queue = wpf_vdev_queue,
 };

 /* -----------------------------------------------------------------------------
  * Initialization and Cleanup
  */

 struct vsp1_rwpf *vsp1_wpf_create(struct vsp1_device *vsp1, unsigned int index)
 {
 	struct v4l2_subdev *subdev;
 	struct vsp1_video *video;
 	struct vsp1_rwpf *wpf;
 	int ret;

 	wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
 	if (wpf == NULL)
 		return ERR_PTR(-ENOMEM);

 	wpf->max_width = WPF_MAX_WIDTH;
 	wpf->max_height = WPF_MAX_HEIGHT;

 	wpf->entity.type = VSP1_ENTITY_WPF;
 	wpf->entity.index = index;

 	ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
 	if (ret < 0)
 		return ERR_PTR(ret);

 	/* Initialize the V4L2 subdev. */
 	subdev = &wpf->entity.subdev;
 	v4l2_subdev_init(subdev, &wpf_ops);

 	subdev->entity.ops = &vsp1_media_ops;
 	subdev->internal_ops = &vsp1_subdev_internal_ops;
 	snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
 		 dev_name(vsp1->dev), index);
 	v4l2_set_subdevdata(subdev, wpf);
 	subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

 	vsp1_entity_init_formats(subdev, NULL);

 	/* Initialize the control handler. */
 	v4l2_ctrl_handler_init(&wpf->ctrls, 1);
 	v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
 			  0, 255, 1, 255);

 	wpf->entity.subdev.ctrl_handler = &wpf->ctrls;

 	if (wpf->ctrls.error) {
 		dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
 			index);
 		ret = wpf->ctrls.error;
 		goto error;
 	}

 	/* Initialize the video device. */
 	video = &wpf->video;

 	video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 	video->vsp1 = vsp1;
 	video->ops = &wpf_vdev_ops;

 	ret = vsp1_video_init(video, &wpf->entity);
 	if (ret < 0)
 		goto error;

 	wpf->entity.video = video;
 	wpf->entity.sink = &wpf->video.video.entity;

 	return wpf;

 error:
 	vsp1_entity_destroy(&wpf->entity);
 	return ERR_PTR(ret);
 }

 /*
  * vsp1_wpf_create_links() - RPF pads links creation
  * @vsp1: Pointer to VSP1 device
  * @entity: Pointer to VSP1 entity
  *
  * return negative error code or zero on success
  */
 int vsp1_wpf_create_links(struct vsp1_device *vsp1,
 			       struct vsp1_entity *entity)
 {
 	struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
 	unsigned int flags;

 	/* Connect the video device to the WPF. All connections are immutable
 	 * except for the WPF0 source link if a LIF is present.
 	 */
 	flags = MEDIA_LNK_FL_ENABLED;
 	if (!(vsp1->pdata.features & VSP1_HAS_LIF) || entity->index != 0)
 		flags |= MEDIA_LNK_FL_IMMUTABLE;

 	return media_create_pad_link(&wpf->entity.subdev.entity,
 				     RWPF_PAD_SOURCE,
 				     &wpf->video.video.entity, 0, flags);
 }
	/*
	* vsp1_wpf.c -- R-Car VSP1 Write Pixel Formatter
	*
	* Copyright (C) 2013-2014 Renesas Electronics Corporation
	*
	* Contact: 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 as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*/

	#include <linux/device.h>

	#include <media/v4l2-subdev.h>

	#include "vsp1.h"
	#include "vsp1_rwpf.h"
	#include "vsp1_video.h"

	#define WPF_MAX_WIDTH 2048
	#define WPF_MAX_HEIGHT 2048

	/* -----------------------------------------------------------------------------
	* Device Access
	*/

	static inline u32 vsp1_wpf_read(struct vsp1_rwpf *wpf, u32 reg)
	{
	return vsp1_read(wpf->entity.vsp1,
	reg + wpf->entity.index * VI6_WPF_OFFSET);
	}

	static inline void vsp1_wpf_write(struct vsp1_rwpf *wpf, u32 reg, u32 data)
	{
	vsp1_write(wpf->entity.vsp1,
	reg + wpf->entity.index * VI6_WPF_OFFSET, data);
	}

	/* -----------------------------------------------------------------------------
	* Controls
	*/

	static int wpf_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct vsp1_rwpf *wpf =
	container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
	u32 value;

	if (!vsp1_entity_is_streaming(&wpf->entity))
	return 0;

	switch (ctrl->id) {
	case V4L2_CID_ALPHA_COMPONENT:
	value = vsp1_wpf_read(wpf, VI6_WPF_OUTFMT);
	value &= ~VI6_WPF_OUTFMT_PDV_MASK;
	value \|= ctrl->val << VI6_WPF_OUTFMT_PDV_SHIFT;
	vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, value);
	break;
	}

	return 0;
	}

	static const struct v4l2_ctrl_ops wpf_ctrl_ops = {
	.s_ctrl = wpf_s_ctrl,
	};

	/* -----------------------------------------------------------------------------
	* V4L2 Subdevice Core Operations
	*/

	static int wpf_s_stream(struct v4l2_subdev *subdev, int enable)
	{
	struct vsp1_pipeline *pipe = to_vsp1_pipeline(&subdev->entity);
	struct vsp1_rwpf *wpf = to_rwpf(subdev);
	struct vsp1_device *vsp1 = wpf->entity.vsp1;
	const struct v4l2_rect *crop = &wpf->crop;
	unsigned int i;
	u32 srcrpf = 0;
	u32 outfmt = 0;
	int ret;

	ret = vsp1_entity_set_streaming(&wpf->entity, enable);
	if (ret < 0)
	return ret;

	if (!enable) {
	vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index), 0);
	vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, 0);
	return 0;
	}

	/* Sources. If the pipeline has a single input and BRU is not used,
	* configure it as the master layer. Otherwise configure all
	* inputs as sub-layers and select the virtual RPF as the master
	* layer.
	*/
	for (i = 0; i < pipe->num_inputs; ++i) {
	struct vsp1_rwpf *input = pipe->inputs[i];

	srcrpf \|= (!pipe->bru && pipe->num_inputs == 1)
	? VI6_WPF_SRCRPF_RPF_ACT_MST(input->entity.index)
	: VI6_WPF_SRCRPF_RPF_ACT_SUB(input->entity.index);
	}

	if (pipe->bru \|\| pipe->num_inputs > 1)
	srcrpf \|= VI6_WPF_SRCRPF_VIRACT_MST;

	vsp1_wpf_write(wpf, VI6_WPF_SRCRPF, srcrpf);

	/* Destination stride. */
	if (!pipe->lif) {
	struct v4l2_pix_format_mplane *format = &wpf->video.format;

	vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_Y,
	format->plane_fmt[0].bytesperline);
	if (format->num_planes > 1)
	vsp1_wpf_write(wpf, VI6_WPF_DSTM_STRIDE_C,
	format->plane_fmt[1].bytesperline);
	}

	vsp1_wpf_write(wpf, VI6_WPF_HSZCLIP, VI6_WPF_SZCLIP_EN \|
	(crop->left << VI6_WPF_SZCLIP_OFST_SHIFT) \|
	(crop->width << VI6_WPF_SZCLIP_SIZE_SHIFT));
	vsp1_wpf_write(wpf, VI6_WPF_VSZCLIP, VI6_WPF_SZCLIP_EN \|
	(crop->top << VI6_WPF_SZCLIP_OFST_SHIFT) \|
	(crop->height << VI6_WPF_SZCLIP_SIZE_SHIFT));

	/* Format */
	if (!pipe->lif) {
	const struct vsp1_format_info *fmtinfo = wpf->video.fmtinfo;

	outfmt = fmtinfo->hwfmt << VI6_WPF_OUTFMT_WRFMT_SHIFT;

	if (fmtinfo->alpha)
	outfmt \|= VI6_WPF_OUTFMT_PXA;
	if (fmtinfo->swap_yc)
	outfmt \|= VI6_WPF_OUTFMT_SPYCS;
	if (fmtinfo->swap_uv)
	outfmt \|= VI6_WPF_OUTFMT_SPUVS;

	vsp1_wpf_write(wpf, VI6_WPF_DSWAP, fmtinfo->swap);
	}

	if (wpf->entity.formats[RWPF_PAD_SINK].code !=
	wpf->entity.formats[RWPF_PAD_SOURCE].code)
	outfmt \|= VI6_WPF_OUTFMT_CSC;

	/* Take the control handler lock to ensure that the PDV value won't be
	* changed behind our back by a set control operation.
	*/
	mutex_lock(wpf->ctrls.lock);
	outfmt \|= vsp1_wpf_read(wpf, VI6_WPF_OUTFMT) & VI6_WPF_OUTFMT_PDV_MASK;
	vsp1_wpf_write(wpf, VI6_WPF_OUTFMT, outfmt);
	mutex_unlock(wpf->ctrls.lock);

	vsp1_write(vsp1, VI6_DPR_WPF_FPORCH(wpf->entity.index),
	VI6_DPR_WPF_FPORCH_FP_WPFN);

	vsp1_write(vsp1, VI6_WPF_WRBCK_CTRL, 0);

	/* Enable interrupts */
	vsp1_write(vsp1, VI6_WPF_IRQ_STA(wpf->entity.index), 0);
	vsp1_write(vsp1, VI6_WPF_IRQ_ENB(wpf->entity.index),
	VI6_WFP_IRQ_ENB_FREE);

	return 0;
	}

	/* -----------------------------------------------------------------------------
	* V4L2 Subdevice Operations
	*/

	static struct v4l2_subdev_video_ops wpf_video_ops = {
	.s_stream = wpf_s_stream,
	};

	static struct v4l2_subdev_pad_ops wpf_pad_ops = {
	.enum_mbus_code = vsp1_rwpf_enum_mbus_code,
	.enum_frame_size = vsp1_rwpf_enum_frame_size,
	.get_fmt = vsp1_rwpf_get_format,
	.set_fmt = vsp1_rwpf_set_format,
	.get_selection = vsp1_rwpf_get_selection,
	.set_selection = vsp1_rwpf_set_selection,
	};

	static struct v4l2_subdev_ops wpf_ops = {
	.video = &wpf_video_ops,
	.pad = &wpf_pad_ops,
	};

	/* -----------------------------------------------------------------------------
	* Video Device Operations
	*/

	static void wpf_vdev_queue(struct vsp1_video *video,
	struct vsp1_video_buffer *buf)
	{
	struct vsp1_rwpf *wpf = container_of(video, struct vsp1_rwpf, video);

	vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_Y, buf->addr[0]);
	if (buf->buf.vb2_buf.num_planes > 1)
	vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C0, buf->addr[1]);
	if (buf->buf.vb2_buf.num_planes > 2)
	vsp1_wpf_write(wpf, VI6_WPF_DSTM_ADDR_C1, buf->addr[2]);
	}

	static const struct vsp1_video_operations wpf_vdev_ops = {
	.queue = wpf_vdev_queue,
	};

	/* -----------------------------------------------------------------------------
	* Initialization and Cleanup
	*/

	struct vsp1_rwpf vsp1_wpf_create(struct vsp1_device vsp1, unsigned int index)
	{
	struct v4l2_subdev *subdev;
	struct vsp1_video *video;
	struct vsp1_rwpf *wpf;
	int ret;

	wpf = devm_kzalloc(vsp1->dev, sizeof(*wpf), GFP_KERNEL);
	if (wpf == NULL)
	return ERR_PTR(-ENOMEM);

	wpf->max_width = WPF_MAX_WIDTH;
	wpf->max_height = WPF_MAX_HEIGHT;

	wpf->entity.type = VSP1_ENTITY_WPF;
	wpf->entity.index = index;

	ret = vsp1_entity_init(vsp1, &wpf->entity, 2);
	if (ret < 0)
	return ERR_PTR(ret);

	/* Initialize the V4L2 subdev. */
	subdev = &wpf->entity.subdev;
	v4l2_subdev_init(subdev, &wpf_ops);

	subdev->entity.ops = &vsp1_media_ops;
	subdev->internal_ops = &vsp1_subdev_internal_ops;
	snprintf(subdev->name, sizeof(subdev->name), "%s wpf.%u",
	dev_name(vsp1->dev), index);
	v4l2_set_subdevdata(subdev, wpf);
	subdev->flags \|= V4L2_SUBDEV_FL_HAS_DEVNODE;

	vsp1_entity_init_formats(subdev, NULL);

	/* Initialize the control handler. */
	v4l2_ctrl_handler_init(&wpf->ctrls, 1);
	v4l2_ctrl_new_std(&wpf->ctrls, &wpf_ctrl_ops, V4L2_CID_ALPHA_COMPONENT,
	0, 255, 1, 255);

	wpf->entity.subdev.ctrl_handler = &wpf->ctrls;

	if (wpf->ctrls.error) {
	dev_err(vsp1->dev, "wpf%u: failed to initialize controls\n",
	index);
	ret = wpf->ctrls.error;
	goto error;
	}

	/* Initialize the video device. */
	video = &wpf->video;

	video->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
	video->vsp1 = vsp1;
	video->ops = &wpf_vdev_ops;

	ret = vsp1_video_init(video, &wpf->entity);
	if (ret < 0)
	goto error;

	wpf->entity.video = video;
	wpf->entity.sink = &wpf->video.video.entity;

	return wpf;

	error:
	vsp1_entity_destroy(&wpf->entity);
	return ERR_PTR(ret);
	}

	/*
	* vsp1_wpf_create_links() - RPF pads links creation
	* @vsp1: Pointer to VSP1 device
	* @entity: Pointer to VSP1 entity
	*
	* return negative error code or zero on success
	*/
	int vsp1_wpf_create_links(struct vsp1_device *vsp1,
	struct vsp1_entity *entity)
	{
	struct vsp1_rwpf *wpf = to_rwpf(&entity->subdev);
	unsigned int flags;

	/* Connect the video device to the WPF. All connections are immutable
	* except for the WPF0 source link if a LIF is present.
	*/
	flags = MEDIA_LNK_FL_ENABLED;
	if (!(vsp1->pdata.features & VSP1_HAS_LIF) \|\| entity->index != 0)
	flags \|= MEDIA_LNK_FL_IMMUTABLE;

	return media_create_pad_link(&wpf->entity.subdev.entity,
	RWPF_PAD_SOURCE,
	&wpf->video.video.entity, 0, flags);
	}