Commit 94fcdf82 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Mauro Carvalho Chehab

[media] v4l: vsp1: Add FCP support

On some platforms the VSP performs memory accesses through an FCP. When
that's the case get a reference to the FCP from the VSP DT node and
enable/disable it at runtime as needed.
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent c7b12cfd
......@@ -14,6 +14,11 @@ Required properties:
- interrupts: VSP interrupt specifier.
- clocks: A phandle + clock-specifier pair for the VSP functional clock.
Optional properties:
- renesas,fcp: A phandle referencing the FCP that handles memory accesses
for the VSP. Not needed on Gen2, mandatory on Gen3.
Example: R8A7790 (R-Car H2) VSP1-S node
......
......@@ -265,6 +265,7 @@ config VIDEO_RENESAS_VSP1
tristate "Renesas VSP1 Video Processing Engine"
depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && HAS_DMA
depends on (ARCH_RENESAS && OF) || COMPILE_TEST
depends on !ARM64 || VIDEO_RENESAS_FCP
select VIDEOBUF2_DMA_CONTIG
---help---
This is a V4L2 driver for the Renesas VSP1 video processing engine.
......
......@@ -25,6 +25,7 @@
struct clk;
struct device;
struct rcar_fcp_device;
struct vsp1_drm;
struct vsp1_entity;
......@@ -62,6 +63,7 @@ struct vsp1_device {
const struct vsp1_device_info *info;
void __iomem *mmio;
struct rcar_fcp_device *fcp;
struct vsp1_bru *bru;
struct vsp1_hsit *hsi;
......
......@@ -22,6 +22,7 @@
#include <linux/pm_runtime.h>
#include <linux/videodev2.h>
#include <media/rcar-fcp.h>
#include <media/v4l2-subdev.h>
#include "vsp1.h"
......@@ -514,6 +515,10 @@ static int vsp1_pm_resume(struct device *dev)
static int vsp1_pm_runtime_suspend(struct device *dev)
{
struct vsp1_device *vsp1 = dev_get_drvdata(dev);
rcar_fcp_disable(vsp1->fcp);
return 0;
}
......@@ -528,7 +533,7 @@ static int vsp1_pm_runtime_resume(struct device *dev)
return ret;
}
return 0;
return rcar_fcp_enable(vsp1->fcp);
}
static const struct dev_pm_ops vsp1_pm_ops = {
......@@ -614,6 +619,7 @@ static const struct vsp1_device_info vsp1_device_infos[] = {
static int vsp1_probe(struct platform_device *pdev)
{
struct vsp1_device *vsp1;
struct device_node *fcp_node;
struct resource *irq;
struct resource *io;
unsigned int i;
......@@ -649,6 +655,18 @@ static int vsp1_probe(struct platform_device *pdev)
return ret;
}
/* FCP (optional) */
fcp_node = of_parse_phandle(pdev->dev.of_node, "renesas,fcp", 0);
if (fcp_node) {
vsp1->fcp = rcar_fcp_get(fcp_node);
of_node_put(fcp_node);
if (IS_ERR(vsp1->fcp)) {
dev_dbg(&pdev->dev, "FCP not found (%ld)\n",
PTR_ERR(vsp1->fcp));
return PTR_ERR(vsp1->fcp);
}
}
/* Configure device parameters based on the version register. */
pm_runtime_enable(&pdev->dev);
......@@ -694,6 +712,7 @@ static int vsp1_remove(struct platform_device *pdev)
struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
vsp1_destroy_entities(vsp1);
rcar_fcp_put(vsp1->fcp);
pm_runtime_disable(&pdev->dev);
......
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