[media] v4l: vsp1: Add VSP+DU support (f3af9572) · Commits · e / devices / android_kernel_teracube_emerald

drivers/media/platform/vsp1/Makefile

+1 −1

Original line number	Diff line number	Diff line
		vsp1-y := vsp1_drv.o vsp1_entity.o vsp1_pipe.o
		vsp1-y += vsp1_video.o
		vsp1-y += vsp1_drm.o vsp1_video.o
		vsp1-y += vsp1_rpf.o vsp1_rwpf.o vsp1_wpf.o
		vsp1-y += vsp1_hsit.o vsp1_lif.o vsp1_lut.o
		vsp1-y += vsp1_bru.o vsp1_sru.o vsp1_uds.o

drivers/media/platform/vsp1/vsp1.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@
		struct clk;
		struct device;

		struct vsp1_drm;
		struct vsp1_platform_data;
		struct vsp1_bru;
		struct vsp1_hsit;
		@@ -78,8 +79,8 @@ struct vsp1_device {

		struct v4l2_device v4l2_dev;
		struct media_device media_dev;

		struct media_entity_operations media_ops;
		struct vsp1_drm *drm;
		};

		int vsp1_device_get(struct vsp1_device *vsp1);

drivers/media/platform/vsp1/vsp1_drm.c

0 → 100644

+552 −0

Original line number	Diff line number	Diff line
		/*
		* vsp1_drm.c -- R-Car VSP1 DRM API
		*
		* Copyright (C) 2015 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 <linux/slab.h>
		#include <linux/vsp1.h>

		#include <media/media-entity.h>
		#include <media/v4l2-subdev.h>

		#include "vsp1.h"
		#include "vsp1_bru.h"
		#include "vsp1_drm.h"
		#include "vsp1_lif.h"
		#include "vsp1_pipe.h"
		#include "vsp1_rwpf.h"

		/* -----------------------------------------------------------------------------
		* Runtime Handling
		*/

		static int vsp1_drm_pipeline_run(struct vsp1_pipeline *pipe)
		{
		struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
		int ret;

		if (vsp1->drm->update) {
		struct vsp1_entity *entity;

		list_for_each_entry(entity, &pipe->entities, list_pipe) {
		/* Skip unused RPFs. */
		if (entity->type == VSP1_ENTITY_RPF) {
		struct vsp1_rwpf *rpf =
		to_rwpf(&entity->subdev);

		if (!pipe->inputs[rpf->entity.index])
		continue;
		}

		vsp1_entity_route_setup(entity);

		ret = v4l2_subdev_call(&entity->subdev, video,
		s_stream, 1);
		if (ret < 0) {
		dev_err(vsp1->dev,
		"DRM pipeline start failure on entity %s\n",
		entity->subdev.name);
		return ret;
		}
		}

		vsp1->drm->update = false;
		}

		vsp1_pipeline_run(pipe);

		return 0;
		}

		static void vsp1_drm_pipeline_frame_end(struct vsp1_pipeline *pipe)
		{
		unsigned long flags;

		spin_lock_irqsave(&pipe->irqlock, flags);
		if (pipe->num_inputs)
		vsp1_drm_pipeline_run(pipe);
		spin_unlock_irqrestore(&pipe->irqlock, flags);
		}

		/* -----------------------------------------------------------------------------
		* DU Driver API
		*/

		int vsp1_du_init(struct device *dev)
		{
		struct vsp1_device *vsp1 = dev_get_drvdata(dev);

		if (!vsp1)
		return -EPROBE_DEFER;

		return 0;
		}
		EXPORT_SYMBOL_GPL(vsp1_du_init);

		/**
		* vsp1_du_setup_lif - Setup the output part of the VSP pipeline
		* @dev: the VSP device
		* @width: output frame width in pixels
		* @height: output frame height in pixels
		*
		* Configure the output part of VSP DRM pipeline for the given frame @width and
		* @height. This sets up formats on the BRU source pad, the WPF0 sink and source
		* pads, and the LIF sink pad.
		*
		* As the media bus code on the BRU source pad is conditioned by the
		* configuration of the BRU sink 0 pad, we also set up the formats on all BRU
		* sinks, even if the configuration will be overwritten later by
		* vsp1_du_setup_rpf(). This ensures that the BRU configuration is set to a well
		* defined state.
		*
		* Return 0 on success or a negative error code on failure.
		*/
		int vsp1_du_setup_lif(struct device *dev, unsigned int width,
		unsigned int height)
		{
		struct vsp1_device *vsp1 = dev_get_drvdata(dev);
		struct vsp1_pipeline *pipe = &vsp1->drm->pipe;
		struct vsp1_bru *bru = vsp1->bru;
		struct v4l2_subdev_format format;
		unsigned int i;
		int ret;

		dev_dbg(vsp1->dev, "%s: configuring LIF with format %ux%u\n",
		__func__, width, height);

		if (width == 0 \|\| height == 0) {
		/* Zero width or height means the CRTC is being disabled, stop
		* the pipeline and turn the light off.
		*/
		ret = vsp1_pipeline_stop(pipe);
		if (ret == -ETIMEDOUT)
		dev_err(vsp1->dev, "DRM pipeline stop timeout\n");

		media_entity_pipeline_stop(&pipe->output->entity.subdev.entity);

		for (i = 0; i < bru->entity.source_pad; ++i) {
		bru->inputs[i].rpf = NULL;
		pipe->inputs[i] = NULL;
		}

		pipe->num_inputs = 0;

		vsp1_device_put(vsp1);

		dev_dbg(vsp1->dev, "%s: pipeline disabled\n", __func__);

		return 0;
		}

		/* Configure the format at the BRU sinks and propagate it through the
		* pipeline.
		*/
		memset(&format, 0, sizeof(format));
		format.which = V4L2_SUBDEV_FORMAT_ACTIVE;

		for (i = 0; i < bru->entity.source_pad; ++i) {
		format.pad = i;

		format.format.width = width;
		format.format.height = height;
		format.format.code = MEDIA_BUS_FMT_ARGB8888_1X32;
		format.format.field = V4L2_FIELD_NONE;

		ret = v4l2_subdev_call(&bru->entity.subdev, pad,
		set_fmt, NULL, &format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on BRU pad %u\n",
		__func__, format.format.width, format.format.height,
		format.format.code, i);
		}

		format.pad = bru->entity.source_pad;
		format.format.width = width;
		format.format.height = height;
		format.format.code = MEDIA_BUS_FMT_ARGB8888_1X32;
		format.format.field = V4L2_FIELD_NONE;

		ret = v4l2_subdev_call(&bru->entity.subdev, pad, set_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on BRU pad %u\n",
		__func__, format.format.width, format.format.height,
		format.format.code, i);

		format.pad = RWPF_PAD_SINK;
		ret = v4l2_subdev_call(&vsp1->wpf[0]->entity.subdev, pad, set_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on WPF0 sink\n",
		__func__, format.format.width, format.format.height,
		format.format.code);

		format.pad = RWPF_PAD_SOURCE;
		ret = v4l2_subdev_call(&vsp1->wpf[0]->entity.subdev, pad, get_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev, "%s: got format %ux%u (%x) on WPF0 source\n",
		__func__, format.format.width, format.format.height,
		format.format.code);

		format.pad = LIF_PAD_SINK;
		ret = v4l2_subdev_call(&vsp1->lif->entity.subdev, pad, set_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on LIF sink\n",
		__func__, format.format.width, format.format.height,
		format.format.code);

		/* Verify that the format at the output of the pipeline matches the
		* requested frame size and media bus code.
		*/
		if (format.format.width != width \|\| format.format.height != height \|\|
		format.format.code != MEDIA_BUS_FMT_ARGB8888_1X32) {
		dev_dbg(vsp1->dev, "%s: format mismatch\n", __func__);
		return -EPIPE;
		}

		/* Mark the pipeline as streaming and enable the VSP1. This will store
		* the pipeline pointer in all entities, which the s_stream handlers
		* will need. We don't start the entities themselves right at this point
		* as there's no plane configured yet, so we can't start processing
		* buffers.
		*/
		ret = vsp1_device_get(vsp1);
		if (ret < 0)
		return ret;

		ret = media_entity_pipeline_start(&pipe->output->entity.subdev.entity,
		&pipe->pipe);
		if (ret < 0) {
		dev_dbg(vsp1->dev, "%s: pipeline start failed\n", __func__);
		vsp1_device_put(vsp1);
		return ret;
		}

		dev_dbg(vsp1->dev, "%s: pipeline enabled\n", __func__);

		return 0;
		}
		EXPORT_SYMBOL_GPL(vsp1_du_setup_lif);

		/**
		* vsp1_du_setup_rpf - Setup one RPF input of the VSP pipeline
		* @dev: the VSP device
		* @rpf_index: index of the RPF to setup (0-based)
		* @pixelformat: V4L2 pixel format for the RPF memory input
		* @pitch: number of bytes per line in the image stored in memory
		* @mem: DMA addresses of the memory buffers (one per plane)
		* @src: the source crop rectangle for the RPF
		* @dst: the destination compose rectangle for the BRU input
		*
		* Configure the VSP to perform composition of the image referenced by @mem
		* through RPF @rpf_index, using the @src crop rectangle and the @dst
		* composition rectangle. The Z-order is fixed with RPF 0 at the bottom.
		*
		* Image format as stored in memory is expressed as a V4L2 @pixelformat value.
		* As a special case, setting the pixel format to 0 will disable the RPF. The
		* @pitch, @mem, @src and @dst parameters are ignored in that case. Calling the
		* function on a disabled RPF is allowed.
		*
		* The memory pitch is configurable to allow for padding at end of lines, or
		* simple for images that extend beyond the crop rectangle boundaries. The
		* @pitch value is expressed in bytes and applies to all planes for multiplanar
		* formats.
		*
		* The source memory buffer is referenced by the DMA address of its planes in
		* the @mem array. Up to two planes are supported. The second plane DMA address
		* is ignored for formats using a single plane.
		*
		* This function isn't reentrant, the caller needs to serialize calls.
		*
		* TODO: Implement Z-order control by decoupling the RPF index from the BRU
		* input index.
		*
		* Return 0 on success or a negative error code on failure.
		*/
		int vsp1_du_setup_rpf(struct device *dev, unsigned int rpf_index,
		u32 pixelformat, unsigned int pitch,
		dma_addr_t mem[2], const struct v4l2_rect *src,
		const struct v4l2_rect *dst)
		{
		struct vsp1_device *vsp1 = dev_get_drvdata(dev);
		struct vsp1_pipeline *pipe = &vsp1->drm->pipe;
		const struct vsp1_format_info *fmtinfo;
		struct v4l2_subdev_selection sel;
		struct v4l2_subdev_format format;
		struct vsp1_rwpf_memory memory;
		struct vsp1_rwpf *rpf;
		unsigned long flags;
		bool start_stop = false;
		int ret;

		if (rpf_index >= vsp1->pdata.rpf_count)
		return -EINVAL;

		rpf = vsp1->rpf[rpf_index];

		if (pixelformat == 0) {
		dev_dbg(vsp1->dev, "%s: RPF%u: disable requested\n", __func__,
		rpf_index);

		spin_lock_irqsave(&pipe->irqlock, flags);

		if (pipe->inputs[rpf_index]) {
		/* Remove the RPF from the pipeline if it was previously
		* enabled.
		*/
		vsp1->bru->inputs[rpf_index].rpf = NULL;
		pipe->inputs[rpf_index] = NULL;

		vsp1->drm->update = true;
		start_stop = --pipe->num_inputs == 0;
		}

		spin_unlock_irqrestore(&pipe->irqlock, flags);

		/* Stop the pipeline if we're the last user. */
		if (start_stop)
		vsp1_pipeline_stop(pipe);

		return 0;
		}

		dev_dbg(vsp1->dev,
		"%s: RPF%u: (%u,%u)/%ux%u -> (%u,%u)/%ux%u (%08x), pitch %u dma { %pad, %pad }\n",
		__func__, rpf_index,
		src->left, src->top, src->width, src->height,
		dst->left, dst->top, dst->width, dst->height,
		pixelformat, pitch, &mem[0], &mem[1]);

		/* Set the stride at the RPF input. */
		fmtinfo = vsp1_get_format_info(pixelformat);
		if (!fmtinfo) {
		dev_dbg(vsp1->dev, "Unsupport pixel format %08x for RPF\n",
		pixelformat);
		return -EINVAL;
		}

		rpf->fmtinfo = fmtinfo;
		rpf->format.num_planes = fmtinfo->planes;
		rpf->format.plane_fmt[0].bytesperline = pitch;
		rpf->format.plane_fmt[1].bytesperline = pitch;

		/* Configure the format on the RPF sink pad and propagate it up to the
		* BRU sink pad.
		*/
		memset(&format, 0, sizeof(format));
		format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
		format.pad = RWPF_PAD_SINK;
		format.format.width = src->width + src->left;
		format.format.height = src->height + src->top;
		format.format.code = fmtinfo->mbus;
		format.format.field = V4L2_FIELD_NONE;

		ret = v4l2_subdev_call(&rpf->entity.subdev, pad, set_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev,
		"%s: set format %ux%u (%x) on RPF%u sink\n",
		__func__, format.format.width, format.format.height,
		format.format.code, rpf->entity.index);

		memset(&sel, 0, sizeof(sel));
		sel.which = V4L2_SUBDEV_FORMAT_ACTIVE;
		sel.pad = RWPF_PAD_SINK;
		sel.target = V4L2_SEL_TGT_CROP;
		sel.r = *src;

		ret = v4l2_subdev_call(&rpf->entity.subdev, pad, set_selection, NULL,
		&sel);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev,
		"%s: set selection (%u,%u)/%ux%u on RPF%u sink\n",
		__func__, sel.r.left, sel.r.top, sel.r.width, sel.r.height,
		rpf->entity.index);

		/* RPF source, hardcode the format to ARGB8888 to turn on format
		* conversion if needed.
		*/
		format.pad = RWPF_PAD_SOURCE;

		ret = v4l2_subdev_call(&rpf->entity.subdev, pad, get_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev,
		"%s: got format %ux%u (%x) on RPF%u source\n",
		__func__, format.format.width, format.format.height,
		format.format.code, rpf->entity.index);

		format.format.code = MEDIA_BUS_FMT_ARGB8888_1X32;

		ret = v4l2_subdev_call(&rpf->entity.subdev, pad, set_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		/* BRU sink, propagate the format from the RPF source. */
		format.pad = rpf->entity.index;

		ret = v4l2_subdev_call(&vsp1->bru->entity.subdev, pad, set_fmt, NULL,
		&format);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev, "%s: set format %ux%u (%x) on BRU pad %u\n",
		__func__, format.format.width, format.format.height,
		format.format.code, format.pad);

		sel.pad = rpf->entity.index;
		sel.target = V4L2_SEL_TGT_COMPOSE;
		sel.r = *dst;

		ret = v4l2_subdev_call(&vsp1->bru->entity.subdev, pad, set_selection,
		NULL, &sel);
		if (ret < 0)
		return ret;

		dev_dbg(vsp1->dev,
		"%s: set selection (%u,%u)/%ux%u on BRU pad %u\n",
		__func__, sel.r.left, sel.r.top, sel.r.width, sel.r.height,
		sel.pad);

		/* Store the compose rectangle coordinates in the RPF. */
		rpf->location.left = dst->left;
		rpf->location.top = dst->top;

		/* Set the memory buffer address. */
		memory.num_planes = fmtinfo->planes;
		memory.addr[0] = mem[0];
		memory.addr[1] = mem[1];

		rpf->ops->set_memory(rpf, &memory);

		spin_lock_irqsave(&pipe->irqlock, flags);

		/* If the RPF was previously stopped set the BRU input to the RPF and
		* store the RPF in the pipeline inputs array.
		*/
		if (!pipe->inputs[rpf->entity.index]) {
		vsp1->bru->inputs[rpf_index].rpf = rpf;
		pipe->inputs[rpf->entity.index] = rpf;
		start_stop = pipe->num_inputs++ == 0;
		}

		/* Start the pipeline if it's currently stopped. */
		vsp1->drm->update = true;
		if (start_stop)
		vsp1_drm_pipeline_run(pipe);

		spin_unlock_irqrestore(&pipe->irqlock, flags);

		return 0;
		}
		EXPORT_SYMBOL_GPL(vsp1_du_setup_rpf);

		/* -----------------------------------------------------------------------------
		* Initialization
		*/

		int vsp1_drm_create_links(struct vsp1_device *vsp1)
		{
		const u32 flags = MEDIA_LNK_FL_ENABLED \| MEDIA_LNK_FL_IMMUTABLE;
		unsigned int i;
		int ret;

		/* VSPD instances require a BRU to perform composition and a LIF to
		* output to the DU.
		*/
		if (!vsp1->bru \|\| !vsp1->lif)
		return -ENXIO;

		for (i = 0; i < vsp1->pdata.rpf_count; ++i) {
		struct vsp1_rwpf *rpf = vsp1->rpf[i];

		ret = media_create_pad_link(&rpf->entity.subdev.entity,
		RWPF_PAD_SOURCE,
		&vsp1->bru->entity.subdev.entity,
		i, flags);
		if (ret < 0)
		return ret;

		rpf->entity.sink = &vsp1->bru->entity.subdev.entity;
		rpf->entity.sink_pad = i;
		}

		ret = media_create_pad_link(&vsp1->bru->entity.subdev.entity,
		vsp1->bru->entity.source_pad,
		&vsp1->wpf[0]->entity.subdev.entity,
		RWPF_PAD_SINK, flags);
		if (ret < 0)
		return ret;

		vsp1->bru->entity.sink = &vsp1->wpf[0]->entity.subdev.entity;
		vsp1->bru->entity.sink_pad = RWPF_PAD_SINK;

		ret = media_create_pad_link(&vsp1->wpf[0]->entity.subdev.entity,
		RWPF_PAD_SOURCE,
		&vsp1->lif->entity.subdev.entity,
		LIF_PAD_SINK, flags);
		if (ret < 0)
		return ret;

		return 0;
		}

		int vsp1_drm_init(struct vsp1_device *vsp1)
		{
		struct vsp1_pipeline *pipe;
		unsigned int i;

		vsp1->drm = devm_kzalloc(vsp1->dev, sizeof(*vsp1->drm), GFP_KERNEL);
		if (!vsp1->drm)
		return -ENOMEM;

		pipe = &vsp1->drm->pipe;

		vsp1_pipeline_init(pipe);
		pipe->frame_end = vsp1_drm_pipeline_frame_end;

		/* The DRM pipeline is static, add entities manually. */
		for (i = 0; i < vsp1->pdata.rpf_count; ++i) {
		struct vsp1_rwpf *input = vsp1->rpf[i];

		list_add_tail(&input->entity.list_pipe, &pipe->entities);
		}

		list_add_tail(&vsp1->bru->entity.list_pipe, &pipe->entities);
		list_add_tail(&vsp1->wpf[0]->entity.list_pipe, &pipe->entities);
		list_add_tail(&vsp1->lif->entity.list_pipe, &pipe->entities);

		pipe->bru = &vsp1->bru->entity;
		pipe->lif = &vsp1->lif->entity;
		pipe->output = vsp1->wpf[0];

		return 0;
		}

drivers/media/platform/vsp1/vsp1_drm.h

0 → 100644

+26 −0

Original line number	Diff line number	Diff line
		/*
		* vsp1_drm.h -- R-Car VSP1 DRM/KMS Interface
		*
		* Copyright (C) 2015 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.
		*/
		#ifndef __VSP1_DRM_H__
		#define __VSP1_DRM_H__

		#include "vsp1_pipe.h"

		struct vsp1_drm {
		struct vsp1_pipeline pipe;
		bool update;
		};

		int vsp1_drm_init(struct vsp1_device *vsp1);
		int vsp1_drm_create_links(struct vsp1_device *vsp1);

		#endif /* __VSP1_DRM_H__ */

drivers/media/platform/vsp1/vsp1_drv.c

+14 −9

Original line number	Diff line number	Diff line
		@@ -25,6 +25,7 @@

		#include "vsp1.h"
		#include "vsp1_bru.h"
		#include "vsp1_drm.h"
		#include "vsp1_hsit.h"
		#include "vsp1_lif.h"
		#include "vsp1_lut.h"
		@@ -120,7 +121,7 @@ static int vsp1_create_sink_links(struct vsp1_device *vsp1,
		return 0;
		}

		static int vsp1_create_links(struct vsp1_device *vsp1)
		static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
		{
		struct vsp1_entity *entity;
		unsigned int i;
		@@ -145,9 +146,6 @@ static int vsp1_create_links(struct vsp1_device *vsp1)
		return ret;
		}

		if (!vsp1->pdata.uapi)
		return 0;

		for (i = 0; i < vsp1->pdata.rpf_count; ++i) {
		struct vsp1_rwpf *rpf = vsp1->rpf[i];

		@@ -360,15 +358,22 @@ static int vsp1_create_entities(struct vsp1_device *vsp1)
		}

		/* Create links. */
		ret = vsp1_create_links(vsp1);
		if (vsp1->pdata.uapi)
		ret = vsp1_uapi_create_links(vsp1);
		else
		ret = vsp1_drm_create_links(vsp1);
		if (ret < 0)
		goto done;

		if (vsp1->pdata.uapi) {
		/* Register subdev nodes if the userspace API is enabled or initialize
		* the DRM pipeline otherwise.
		*/
		if (vsp1->pdata.uapi)
		ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
		else
		ret = vsp1_drm_init(vsp1);
		if (ret < 0)
		goto done;
		}

		ret = media_device_register(mdev);