drivers/media/platform/vsp1/vsp1_rpf.c - kernel/bruno - Git at Google

 /*
  * vsp1_rpf.c  --  R-Car VSP1 Read 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 RPF_MAX_WIDTH				8190
 #define RPF_MAX_HEIGHT				8190

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

 static inline u32 vsp1_rpf_read(struct vsp1_rwpf *rpf, u32 reg)
 {
 	return vsp1_read(rpf->entity.vsp1,
 			 reg + rpf->entity.index * VI6_RPF_OFFSET);
 }

 static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data)
 {
 	vsp1_write(rpf->entity.vsp1,
 		   reg + rpf->entity.index * VI6_RPF_OFFSET, data);
 }

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

 static int rpf_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct vsp1_rwpf *rpf =
 		container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
 	struct vsp1_pipeline *pipe;

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

 	switch (ctrl->id) {
 	case V4L2_CID_ALPHA_COMPONENT:
 		vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
 			       ctrl->val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);

 		pipe = to_vsp1_pipeline(&rpf->entity.subdev.entity);
 		vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, ctrl->val);
 		break;
 	}

 	return 0;
 }

 static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
 	.s_ctrl = rpf_s_ctrl,
 };

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

 static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
 {
 	struct vsp1_rwpf *rpf = to_rwpf(subdev);
 	const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo;
 	const struct v4l2_pix_format_mplane *format = &rpf->video.format;
 	const struct v4l2_rect *crop = &rpf->crop;
 	u32 pstride;
 	u32 infmt;
 	int ret;

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

 	if (!enable)
 		return 0;

 	/* Source size, stride and crop offsets.
 	 *
 	 * The crop offsets correspond to the location of the crop rectangle top
 	 * left corner in the plane buffer. Only two offsets are needed, as
 	 * planes 2 and 3 always have identical strides.
 	 */
 	vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
 		       (crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) |
 		       (crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
 	vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
 		       (crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) |
 		       (crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));

 	rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
 			+ crop->left * fmtinfo->bpp[0] / 8;
 	pstride = format->plane_fmt[0].bytesperline
 		<< VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;

 	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 		       rpf->buf_addr[0] + rpf->offsets[0]);

 	if (format->num_planes > 1) {
 		rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
 				+ crop->left * fmtinfo->bpp[1] / 8;
 		pstride |= format->plane_fmt[1].bytesperline
 			<< VI6_RPF_SRCM_PSTRIDE_C_SHIFT;

 		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 			       rpf->buf_addr[1] + rpf->offsets[1]);

 		if (format->num_planes > 2)
 			vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 				       rpf->buf_addr[2] + rpf->offsets[1]);
 	}

 	vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);

 	/* Format */
 	infmt = VI6_RPF_INFMT_CIPM
 	      | (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);

 	if (fmtinfo->swap_yc)
 		infmt |= VI6_RPF_INFMT_SPYCS;
 	if (fmtinfo->swap_uv)
 		infmt |= VI6_RPF_INFMT_SPUVS;

 	if (rpf->entity.formats[RWPF_PAD_SINK].code !=
 	    rpf->entity.formats[RWPF_PAD_SOURCE].code)
 		infmt |= VI6_RPF_INFMT_CSC;

 	vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
 	vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);

 	/* Output location */
 	vsp1_rpf_write(rpf, VI6_RPF_LOC,
 		       (rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) |
 		       (rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));

 	/* Use the alpha channel (extended to 8 bits) when available or an
 	 * alpha value set through the V4L2_CID_ALPHA_COMPONENT control
 	 * otherwise. Disable color keying.
 	 */
 	vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT |
 		       (fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
 				       : VI6_RPF_ALPH_SEL_ASEL_FIXED));
 	vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
 	vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);

 	return 0;
 }

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

 static struct v4l2_subdev_video_ops rpf_video_ops = {
 	.s_stream = rpf_s_stream,
 };

 static struct v4l2_subdev_pad_ops rpf_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 rpf_ops = {
 	.video	= &rpf_video_ops,
 	.pad    = &rpf_pad_ops,
 };

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

 static void rpf_vdev_queue(struct vsp1_video *video,
 			   struct vsp1_video_buffer *buf)
 {
 	struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);
 	unsigned int i;

 	for (i = 0; i < 3; ++i)
 		rpf->buf_addr[i] = buf->addr[i];

 	if (!vsp1_entity_is_streaming(&rpf->entity))
 		return;

 	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
 		       buf->addr[0] + rpf->offsets[0]);
 	if (buf->buf.vb2_buf.num_planes > 1)
 		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
 			       buf->addr[1] + rpf->offsets[1]);
 	if (buf->buf.vb2_buf.num_planes > 2)
 		vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
 			       buf->addr[2] + rpf->offsets[1]);
 }

 static const struct vsp1_video_operations rpf_vdev_ops = {
 	.queue = rpf_vdev_queue,
 };

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

 struct vsp1_rwpf *vsp1_rpf_create(struct vsp1_device *vsp1, unsigned int index)
 {
 	struct v4l2_subdev *subdev;
 	struct vsp1_video *video;
 	struct vsp1_rwpf *rpf;
 	int ret;

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

 	rpf->max_width = RPF_MAX_WIDTH;
 	rpf->max_height = RPF_MAX_HEIGHT;

 	rpf->entity.type = VSP1_ENTITY_RPF;
 	rpf->entity.index = index;

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

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

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

 	vsp1_entity_init_formats(subdev, NULL);

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

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

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

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

 	video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 	video->vsp1 = vsp1;
 	video->ops = &rpf_vdev_ops;

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

 	rpf->entity.video = video;

 	/* Connect the video device to the RPF. */
 	ret = media_entity_create_link(&rpf->video.video.entity, 0,
 				       &rpf->entity.subdev.entity,
 				       RWPF_PAD_SINK,
 				       MEDIA_LNK_FL_ENABLED |
 				       MEDIA_LNK_FL_IMMUTABLE);
 	if (ret < 0)
 		goto error;

 	return rpf;

 error:
 	vsp1_entity_destroy(&rpf->entity);
 	return ERR_PTR(ret);
 }
	/*
	* vsp1_rpf.c -- R-Car VSP1 Read 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 RPF_MAX_WIDTH 8190
	#define RPF_MAX_HEIGHT 8190

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

	static inline u32 vsp1_rpf_read(struct vsp1_rwpf *rpf, u32 reg)
	{
	return vsp1_read(rpf->entity.vsp1,
	reg + rpf->entity.index * VI6_RPF_OFFSET);
	}

	static inline void vsp1_rpf_write(struct vsp1_rwpf *rpf, u32 reg, u32 data)
	{
	vsp1_write(rpf->entity.vsp1,
	reg + rpf->entity.index * VI6_RPF_OFFSET, data);
	}

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

	static int rpf_s_ctrl(struct v4l2_ctrl *ctrl)
	{
	struct vsp1_rwpf *rpf =
	container_of(ctrl->handler, struct vsp1_rwpf, ctrls);
	struct vsp1_pipeline *pipe;

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

	switch (ctrl->id) {
	case V4L2_CID_ALPHA_COMPONENT:
	vsp1_rpf_write(rpf, VI6_RPF_VRTCOL_SET,
	ctrl->val << VI6_RPF_VRTCOL_SET_LAYA_SHIFT);

	pipe = to_vsp1_pipeline(&rpf->entity.subdev.entity);
	vsp1_pipeline_propagate_alpha(pipe, &rpf->entity, ctrl->val);
	break;
	}

	return 0;
	}

	static const struct v4l2_ctrl_ops rpf_ctrl_ops = {
	.s_ctrl = rpf_s_ctrl,
	};

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

	static int rpf_s_stream(struct v4l2_subdev *subdev, int enable)
	{
	struct vsp1_rwpf *rpf = to_rwpf(subdev);
	const struct vsp1_format_info *fmtinfo = rpf->video.fmtinfo;
	const struct v4l2_pix_format_mplane *format = &rpf->video.format;
	const struct v4l2_rect *crop = &rpf->crop;
	u32 pstride;
	u32 infmt;
	int ret;

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

	if (!enable)
	return 0;

	/* Source size, stride and crop offsets.
	*
	* The crop offsets correspond to the location of the crop rectangle top
	* left corner in the plane buffer. Only two offsets are needed, as
	* planes 2 and 3 always have identical strides.
	*/
	vsp1_rpf_write(rpf, VI6_RPF_SRC_BSIZE,
	(crop->width << VI6_RPF_SRC_BSIZE_BHSIZE_SHIFT) \|
	(crop->height << VI6_RPF_SRC_BSIZE_BVSIZE_SHIFT));
	vsp1_rpf_write(rpf, VI6_RPF_SRC_ESIZE,
	(crop->width << VI6_RPF_SRC_ESIZE_EHSIZE_SHIFT) \|
	(crop->height << VI6_RPF_SRC_ESIZE_EVSIZE_SHIFT));

	rpf->offsets[0] = crop->top * format->plane_fmt[0].bytesperline
	+ crop->left * fmtinfo->bpp[0] / 8;
	pstride = format->plane_fmt[0].bytesperline
	<< VI6_RPF_SRCM_PSTRIDE_Y_SHIFT;

	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
	rpf->buf_addr[0] + rpf->offsets[0]);

	if (format->num_planes > 1) {
	rpf->offsets[1] = crop->top * format->plane_fmt[1].bytesperline
	+ crop->left * fmtinfo->bpp[1] / 8;
	pstride \|= format->plane_fmt[1].bytesperline
	<< VI6_RPF_SRCM_PSTRIDE_C_SHIFT;

	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
	rpf->buf_addr[1] + rpf->offsets[1]);

	if (format->num_planes > 2)
	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
	rpf->buf_addr[2] + rpf->offsets[1]);
	}

	vsp1_rpf_write(rpf, VI6_RPF_SRCM_PSTRIDE, pstride);

	/* Format */
	infmt = VI6_RPF_INFMT_CIPM
	\| (fmtinfo->hwfmt << VI6_RPF_INFMT_RDFMT_SHIFT);

	if (fmtinfo->swap_yc)
	infmt \|= VI6_RPF_INFMT_SPYCS;
	if (fmtinfo->swap_uv)
	infmt \|= VI6_RPF_INFMT_SPUVS;

	if (rpf->entity.formats[RWPF_PAD_SINK].code !=
	rpf->entity.formats[RWPF_PAD_SOURCE].code)
	infmt \|= VI6_RPF_INFMT_CSC;

	vsp1_rpf_write(rpf, VI6_RPF_INFMT, infmt);
	vsp1_rpf_write(rpf, VI6_RPF_DSWAP, fmtinfo->swap);

	/* Output location */
	vsp1_rpf_write(rpf, VI6_RPF_LOC,
	(rpf->location.left << VI6_RPF_LOC_HCOORD_SHIFT) \|
	(rpf->location.top << VI6_RPF_LOC_VCOORD_SHIFT));

	/* Use the alpha channel (extended to 8 bits) when available or an
	* alpha value set through the V4L2_CID_ALPHA_COMPONENT control
	* otherwise. Disable color keying.
	*/
	vsp1_rpf_write(rpf, VI6_RPF_ALPH_SEL, VI6_RPF_ALPH_SEL_AEXT_EXT \|
	(fmtinfo->alpha ? VI6_RPF_ALPH_SEL_ASEL_PACKED
	: VI6_RPF_ALPH_SEL_ASEL_FIXED));
	vsp1_rpf_write(rpf, VI6_RPF_MSK_CTRL, 0);
	vsp1_rpf_write(rpf, VI6_RPF_CKEY_CTRL, 0);

	return 0;
	}

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

	static struct v4l2_subdev_video_ops rpf_video_ops = {
	.s_stream = rpf_s_stream,
	};

	static struct v4l2_subdev_pad_ops rpf_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 rpf_ops = {
	.video = &rpf_video_ops,
	.pad = &rpf_pad_ops,
	};

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

	static void rpf_vdev_queue(struct vsp1_video *video,
	struct vsp1_video_buffer *buf)
	{
	struct vsp1_rwpf *rpf = container_of(video, struct vsp1_rwpf, video);
	unsigned int i;

	for (i = 0; i < 3; ++i)
	rpf->buf_addr[i] = buf->addr[i];

	if (!vsp1_entity_is_streaming(&rpf->entity))
	return;

	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_Y,
	buf->addr[0] + rpf->offsets[0]);
	if (buf->buf.vb2_buf.num_planes > 1)
	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C0,
	buf->addr[1] + rpf->offsets[1]);
	if (buf->buf.vb2_buf.num_planes > 2)
	vsp1_rpf_write(rpf, VI6_RPF_SRCM_ADDR_C1,
	buf->addr[2] + rpf->offsets[1]);
	}

	static const struct vsp1_video_operations rpf_vdev_ops = {
	.queue = rpf_vdev_queue,
	};

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

	struct vsp1_rwpf vsp1_rpf_create(struct vsp1_device vsp1, unsigned int index)
	{
	struct v4l2_subdev *subdev;
	struct vsp1_video *video;
	struct vsp1_rwpf *rpf;
	int ret;

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

	rpf->max_width = RPF_MAX_WIDTH;
	rpf->max_height = RPF_MAX_HEIGHT;

	rpf->entity.type = VSP1_ENTITY_RPF;
	rpf->entity.index = index;

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

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

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

	vsp1_entity_init_formats(subdev, NULL);

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

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

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

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

	video->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
	video->vsp1 = vsp1;
	video->ops = &rpf_vdev_ops;

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

	rpf->entity.video = video;

	/* Connect the video device to the RPF. */
	ret = media_entity_create_link(&rpf->video.video.entity, 0,
	&rpf->entity.subdev.entity,
	RWPF_PAD_SINK,
	MEDIA_LNK_FL_ENABLED \|
	MEDIA_LNK_FL_IMMUTABLE);
	if (ret < 0)
	goto error;

	return rpf;

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