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