drm: rcar-du: Drop LVDS device tree backward compatibility
The rcar-du driver goes to great lengths to preserve device tree backward compatibility for the LVDS encoders by patching old device trees at runtime. The last R-Car Gen2 platform was converted to the new bindings commitedb0c3affe("ARM: dts: r8a7793: Convert to new LVDS DT bindings"), in v4.17, and the last RZ/G1 platform converted in commit6a6a797625("ARM: dts: r8a7743: Convert to new LVDS DT bindings"), in v5.0. Both are older than commit58256143cf("clk: renesas: Remove R-Car Gen2 legacy DT clock support"), in v5.5, which removes support for legacy bindings for clocks. The LVDS compatibility code is thus not needed anymore. Drop it. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart
parent
ed6e76676b
commit
841281fe52
@ -6,12 +6,6 @@ rcar-du-drm-y := rcar_du_crtc.o \
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rcar_du_kms.o \
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rcar_du_kms.o \
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rcar_du_plane.o \
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rcar_du_plane.o \
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rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \
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rcar_du_of_lvds_r8a7790.dtb.o \
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rcar_du_of_lvds_r8a7791.dtb.o \
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rcar_du_of_lvds_r8a7793.dtb.o \
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rcar_du_of_lvds_r8a7795.dtb.o \
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rcar_du_of_lvds_r8a7796.dtb.o
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rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
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rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
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rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o
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rcar-du-drm-$(CONFIG_DRM_RCAR_WRITEBACK) += rcar_du_writeback.o
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@ -28,7 +28,6 @@
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#include "rcar_du_drv.h"
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#include "rcar_du_drv.h"
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#include "rcar_du_kms.h"
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#include "rcar_du_kms.h"
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#include "rcar_du_of.h"
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#include "rcar_du_regs.h"
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#include "rcar_du_regs.h"
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/* -----------------------------------------------------------------------------
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/* -----------------------------------------------------------------------------
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@ -634,6 +633,9 @@ static int rcar_du_probe(struct platform_device *pdev)
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unsigned int mask;
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unsigned int mask;
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int ret;
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int ret;
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if (drm_firmware_drivers_only())
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return -ENODEV;
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/* Allocate and initialize the R-Car device structure. */
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/* Allocate and initialize the R-Car device structure. */
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rcdu = devm_drm_dev_alloc(&pdev->dev, &rcar_du_driver,
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rcdu = devm_drm_dev_alloc(&pdev->dev, &rcar_du_driver,
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struct rcar_du_device, ddev);
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struct rcar_du_device, ddev);
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@ -699,22 +701,7 @@ static struct platform_driver rcar_du_platform_driver = {
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},
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},
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};
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};
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static int __init rcar_du_init(void)
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module_platform_driver(rcar_du_platform_driver);
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{
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if (drm_firmware_drivers_only())
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return -ENODEV;
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rcar_du_of_init(rcar_du_of_table);
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return platform_driver_register(&rcar_du_platform_driver);
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}
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module_init(rcar_du_init);
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static void __exit rcar_du_exit(void)
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{
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platform_driver_unregister(&rcar_du_platform_driver);
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}
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module_exit(rcar_du_exit);
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MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
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MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
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MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
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MODULE_DESCRIPTION("Renesas R-Car Display Unit DRM Driver");
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@ -1,323 +0,0 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* rcar_du_of.c - Legacy DT bindings compatibility
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*
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* Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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*
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* Based on work from Jyri Sarha <jsarha@ti.com>
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* Copyright (C) 2015 Texas Instruments
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_fdt.h>
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#include <linux/of_graph.h>
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#include <linux/slab.h>
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#include "rcar_du_crtc.h"
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#include "rcar_du_drv.h"
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#include "rcar_du_of.h"
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/* -----------------------------------------------------------------------------
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* Generic Overlay Handling
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*/
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struct rcar_du_of_overlay {
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const char *compatible;
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void *begin;
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void *end;
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};
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#define RCAR_DU_OF_DTB(type, soc) \
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extern char __dtb_rcar_du_of_##type##_##soc##_begin[]; \
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extern char __dtb_rcar_du_of_##type##_##soc##_end[]
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#define RCAR_DU_OF_OVERLAY(type, soc) \
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{ \
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.compatible = "renesas,du-" #soc, \
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.begin = __dtb_rcar_du_of_##type##_##soc##_begin, \
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.end = __dtb_rcar_du_of_##type##_##soc##_end, \
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}
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static int __init rcar_du_of_apply_overlay(const struct rcar_du_of_overlay *dtbs,
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const char *compatible)
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{
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const struct rcar_du_of_overlay *dtb = NULL;
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unsigned int i;
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int ovcs_id;
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for (i = 0; dtbs[i].compatible; ++i) {
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if (!strcmp(dtbs[i].compatible, compatible)) {
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dtb = &dtbs[i];
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break;
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}
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}
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if (!dtb)
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return -ENODEV;
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ovcs_id = 0;
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return of_overlay_fdt_apply(dtb->begin, dtb->end - dtb->begin,
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&ovcs_id);
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}
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static int __init rcar_du_of_add_property(struct of_changeset *ocs,
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struct device_node *np,
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const char *name, const void *value,
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int length)
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{
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struct property *prop;
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int ret = -ENOMEM;
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prop = kzalloc(sizeof(*prop), GFP_KERNEL);
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if (!prop)
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return -ENOMEM;
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prop->name = kstrdup(name, GFP_KERNEL);
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if (!prop->name)
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goto out_err;
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prop->value = kmemdup(value, length, GFP_KERNEL);
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if (!prop->value)
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goto out_err;
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of_property_set_flag(prop, OF_DYNAMIC);
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prop->length = length;
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ret = of_changeset_add_property(ocs, np, prop);
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if (!ret)
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return 0;
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out_err:
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kfree(prop->value);
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kfree(prop->name);
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kfree(prop);
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return ret;
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}
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/* -----------------------------------------------------------------------------
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* LVDS Overlays
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*/
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RCAR_DU_OF_DTB(lvds, r8a7790);
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RCAR_DU_OF_DTB(lvds, r8a7791);
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RCAR_DU_OF_DTB(lvds, r8a7793);
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RCAR_DU_OF_DTB(lvds, r8a7795);
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RCAR_DU_OF_DTB(lvds, r8a7796);
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static const struct rcar_du_of_overlay rcar_du_lvds_overlays[] __initconst = {
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RCAR_DU_OF_OVERLAY(lvds, r8a7790),
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RCAR_DU_OF_OVERLAY(lvds, r8a7791),
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RCAR_DU_OF_OVERLAY(lvds, r8a7793),
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RCAR_DU_OF_OVERLAY(lvds, r8a7795),
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RCAR_DU_OF_OVERLAY(lvds, r8a7796),
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{ /* Sentinel */ },
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};
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static struct of_changeset rcar_du_lvds_changeset;
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static void __init rcar_du_of_lvds_patch_one(struct device_node *lvds,
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const struct of_phandle_args *clk,
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struct device_node *local,
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struct device_node *remote)
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{
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unsigned int psize;
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unsigned int i;
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__be32 value[4];
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int ret;
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/*
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* Set the LVDS clocks property. This can't be performed by the overlay
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* as the structure of the clock specifier has changed over time, and we
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* don't know at compile time which binding version the system we will
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* run on uses.
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*/
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if (clk->args_count >= ARRAY_SIZE(value) - 1)
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return;
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of_changeset_init(&rcar_du_lvds_changeset);
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value[0] = cpu_to_be32(clk->np->phandle);
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for (i = 0; i < clk->args_count; ++i)
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value[i + 1] = cpu_to_be32(clk->args[i]);
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psize = (clk->args_count + 1) * 4;
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ret = rcar_du_of_add_property(&rcar_du_lvds_changeset, lvds,
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"clocks", value, psize);
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if (ret < 0)
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goto done;
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/*
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* Insert the node in the OF graph: patch the LVDS ports remote-endpoint
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* properties to point to the endpoints of the sibling nodes in the
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* graph. This can't be performed by the overlay: on the input side the
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* overlay would contain a phandle for the DU LVDS output port that
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* would clash with the system DT, and on the output side the connection
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* is board-specific.
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*/
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value[0] = cpu_to_be32(local->phandle);
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value[1] = cpu_to_be32(remote->phandle);
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for (i = 0; i < 2; ++i) {
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struct device_node *endpoint;
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endpoint = of_graph_get_endpoint_by_regs(lvds, i, 0);
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if (!endpoint) {
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ret = -EINVAL;
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goto done;
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}
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ret = rcar_du_of_add_property(&rcar_du_lvds_changeset,
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endpoint, "remote-endpoint",
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&value[i], sizeof(value[i]));
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of_node_put(endpoint);
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if (ret < 0)
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goto done;
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}
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ret = of_changeset_apply(&rcar_du_lvds_changeset);
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done:
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if (ret < 0)
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of_changeset_destroy(&rcar_du_lvds_changeset);
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}
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struct lvds_of_data {
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struct resource res;
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struct of_phandle_args clkspec;
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struct device_node *local;
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struct device_node *remote;
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};
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static void __init rcar_du_of_lvds_patch(const struct of_device_id *of_ids)
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{
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const struct rcar_du_device_info *info;
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const struct of_device_id *match;
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struct lvds_of_data lvds_data[2] = { };
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struct device_node *lvds_node;
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struct device_node *soc_node;
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struct device_node *du_node;
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char compatible[22];
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const char *soc_name;
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unsigned int i;
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int ret;
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/* Get the DU node and exit if not present or disabled. */
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du_node = of_find_matching_node_and_match(NULL, of_ids, &match);
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if (!du_node || !of_device_is_available(du_node)) {
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of_node_put(du_node);
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return;
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}
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info = match->data;
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soc_node = of_get_parent(du_node);
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if (WARN_ON(info->num_lvds > ARRAY_SIZE(lvds_data)))
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goto done;
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/*
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* Skip if the LVDS nodes already exists.
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*
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* The nodes are searched based on the compatible string, which we
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* construct from the SoC name found in the DU compatible string. As a
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* match has been found we know the compatible string matches the
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* expected format and can thus skip some of the string manipulation
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* normal safety checks.
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*/
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soc_name = strchr(match->compatible, '-') + 1;
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sprintf(compatible, "renesas,%s-lvds", soc_name);
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lvds_node = of_find_compatible_node(NULL, NULL, compatible);
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if (lvds_node) {
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of_node_put(lvds_node);
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return;
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}
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/*
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* Parse the DU node and store the register specifier, the clock
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* specifier and the local and remote endpoint of the LVDS link for
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* later use.
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*/
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for (i = 0; i < info->num_lvds; ++i) {
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struct lvds_of_data *lvds = &lvds_data[i];
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unsigned int port;
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char name[7];
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int index;
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sprintf(name, "lvds.%u", i);
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index = of_property_match_string(du_node, "clock-names", name);
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if (index < 0)
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continue;
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ret = of_parse_phandle_with_args(du_node, "clocks",
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"#clock-cells", index,
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&lvds->clkspec);
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if (ret < 0)
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continue;
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port = info->routes[RCAR_DU_OUTPUT_LVDS0 + i].port;
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lvds->local = of_graph_get_endpoint_by_regs(du_node, port, 0);
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if (!lvds->local)
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continue;
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lvds->remote = of_graph_get_remote_endpoint(lvds->local);
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if (!lvds->remote)
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continue;
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index = of_property_match_string(du_node, "reg-names", name);
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if (index < 0)
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continue;
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of_address_to_resource(du_node, index, &lvds->res);
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}
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/* Parse and apply the overlay. This will resolve phandles. */
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ret = rcar_du_of_apply_overlay(rcar_du_lvds_overlays,
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match->compatible);
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if (ret < 0)
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goto done;
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/* Patch the newly created LVDS encoder nodes. */
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for_each_child_of_node(soc_node, lvds_node) {
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struct resource res;
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if (!of_device_is_compatible(lvds_node, compatible))
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continue;
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/* Locate the lvds_data entry based on the resource start. */
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ret = of_address_to_resource(lvds_node, 0, &res);
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if (ret < 0)
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continue;
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for (i = 0; i < ARRAY_SIZE(lvds_data); ++i) {
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if (lvds_data[i].res.start == res.start)
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break;
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}
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if (i == ARRAY_SIZE(lvds_data))
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continue;
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/* Patch the LVDS encoder. */
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|
||||||
rcar_du_of_lvds_patch_one(lvds_node, &lvds_data[i].clkspec,
|
|
||||||
lvds_data[i].local,
|
|
||||||
lvds_data[i].remote);
|
|
||||||
}
|
|
||||||
|
|
||||||
done:
|
|
||||||
for (i = 0; i < info->num_lvds; ++i) {
|
|
||||||
of_node_put(lvds_data[i].clkspec.np);
|
|
||||||
of_node_put(lvds_data[i].local);
|
|
||||||
of_node_put(lvds_data[i].remote);
|
|
||||||
}
|
|
||||||
|
|
||||||
of_node_put(soc_node);
|
|
||||||
of_node_put(du_node);
|
|
||||||
}
|
|
||||||
|
|
||||||
void __init rcar_du_of_init(const struct of_device_id *of_ids)
|
|
||||||
{
|
|
||||||
rcar_du_of_lvds_patch(of_ids);
|
|
||||||
}
|
|
||||||
@ -1,20 +0,0 @@
|
|||||||
/* SPDX-License-Identifier: GPL-2.0 */
|
|
||||||
/*
|
|
||||||
* rcar_du_of.h - Legacy DT bindings compatibility
|
|
||||||
*
|
|
||||||
* Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
||||||
*/
|
|
||||||
#ifndef __RCAR_DU_OF_H__
|
|
||||||
#define __RCAR_DU_OF_H__
|
|
||||||
|
|
||||||
#include <linux/init.h>
|
|
||||||
|
|
||||||
struct of_device_id;
|
|
||||||
|
|
||||||
#if IS_ENABLED(CONFIG_DRM_RCAR_LVDS)
|
|
||||||
void __init rcar_du_of_init(const struct of_device_id *of_ids);
|
|
||||||
#else
|
|
||||||
static inline void rcar_du_of_init(const struct of_device_id *of_ids) { }
|
|
||||||
#endif /* CONFIG_DRM_RCAR_LVDS */
|
|
||||||
|
|
||||||
#endif /* __RCAR_DU_OF_H__ */
|
|
||||||
@ -1,69 +0,0 @@
|
|||||||
// SPDX-License-Identifier: GPL-2.0
|
|
||||||
/*
|
|
||||||
* rcar_du_of_lvds_r8a7790.dts - Legacy LVDS DT bindings conversion for R8A7790
|
|
||||||
*
|
|
||||||
* Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
||||||
*/
|
|
||||||
|
|
||||||
/dts-v1/;
|
|
||||||
/plugin/;
|
|
||||||
|
|
||||||
&{/} {
|
|
||||||
#address-cells = <2>;
|
|
||||||
#size-cells = <2>;
|
|
||||||
|
|
||||||
lvds@feb90000 {
|
|
||||||
compatible = "renesas,r8a7790-lvds";
|
|
||||||
reg = <0 0xfeb90000 0 0x1c>;
|
|
||||||
|
|
||||||
ports {
|
|
||||||
#address-cells = <1>;
|
|
||||||
#size-cells = <0>;
|
|
||||||
|
|
||||||
port@0 {
|
|
||||||
reg = <0>;
|
|
||||||
lvds0_input: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
port@1 {
|
|
||||||
reg = <1>;
|
|
||||||
lvds0_out: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
lvds@feb94000 {
|
|
||||||
compatible = "renesas,r8a7790-lvds";
|
|
||||||
reg = <0 0xfeb94000 0 0x1c>;
|
|
||||||
|
|
||||||
ports {
|
|
||||||
#address-cells = <1>;
|
|
||||||
#size-cells = <0>;
|
|
||||||
|
|
||||||
port@0 {
|
|
||||||
reg = <0>;
|
|
||||||
lvds1_input: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
port@1 {
|
|
||||||
reg = <1>;
|
|
||||||
lvds1_out: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
&{/display@feb00000/ports} {
|
|
||||||
port@1 {
|
|
||||||
endpoint {
|
|
||||||
remote-endpoint = <&lvds0_input>;
|
|
||||||
};
|
|
||||||
};
|
|
||||||
port@2 {
|
|
||||||
endpoint {
|
|
||||||
remote-endpoint = <&lvds1_input>;
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
@ -1,43 +0,0 @@
|
|||||||
// SPDX-License-Identifier: GPL-2.0
|
|
||||||
/*
|
|
||||||
* rcar_du_of_lvds_r8a7791.dts - Legacy LVDS DT bindings conversion for R8A7791
|
|
||||||
*
|
|
||||||
* Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
||||||
*/
|
|
||||||
|
|
||||||
/dts-v1/;
|
|
||||||
/plugin/;
|
|
||||||
|
|
||||||
&{/} {
|
|
||||||
#address-cells = <2>;
|
|
||||||
#size-cells = <2>;
|
|
||||||
|
|
||||||
lvds@feb90000 {
|
|
||||||
compatible = "renesas,r8a7791-lvds";
|
|
||||||
reg = <0 0xfeb90000 0 0x1c>;
|
|
||||||
|
|
||||||
ports {
|
|
||||||
#address-cells = <1>;
|
|
||||||
#size-cells = <0>;
|
|
||||||
|
|
||||||
port@0 {
|
|
||||||
reg = <0>;
|
|
||||||
lvds0_input: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
port@1 {
|
|
||||||
reg = <1>;
|
|
||||||
lvds0_out: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
&{/display@feb00000/ports} {
|
|
||||||
port@1 {
|
|
||||||
endpoint {
|
|
||||||
remote-endpoint = <&lvds0_input>;
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
@ -1,43 +0,0 @@
|
|||||||
// SPDX-License-Identifier: GPL-2.0
|
|
||||||
/*
|
|
||||||
* rcar_du_of_lvds_r8a7793.dts - Legacy LVDS DT bindings conversion for R8A7793
|
|
||||||
*
|
|
||||||
* Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
||||||
*/
|
|
||||||
|
|
||||||
/dts-v1/;
|
|
||||||
/plugin/;
|
|
||||||
|
|
||||||
&{/} {
|
|
||||||
#address-cells = <2>;
|
|
||||||
#size-cells = <2>;
|
|
||||||
|
|
||||||
lvds@feb90000 {
|
|
||||||
compatible = "renesas,r8a7793-lvds";
|
|
||||||
reg = <0 0xfeb90000 0 0x1c>;
|
|
||||||
|
|
||||||
ports {
|
|
||||||
#address-cells = <1>;
|
|
||||||
#size-cells = <0>;
|
|
||||||
|
|
||||||
port@0 {
|
|
||||||
reg = <0>;
|
|
||||||
lvds0_input: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
port@1 {
|
|
||||||
reg = <1>;
|
|
||||||
lvds0_out: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
&{/display@feb00000/ports} {
|
|
||||||
port@1 {
|
|
||||||
endpoint {
|
|
||||||
remote-endpoint = <&lvds0_input>;
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
@ -1,43 +0,0 @@
|
|||||||
// SPDX-License-Identifier: GPL-2.0
|
|
||||||
/*
|
|
||||||
* rcar_du_of_lvds_r8a7795.dts - Legacy LVDS DT bindings conversion for R8A7795
|
|
||||||
*
|
|
||||||
* Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
||||||
*/
|
|
||||||
|
|
||||||
/dts-v1/;
|
|
||||||
/plugin/;
|
|
||||||
|
|
||||||
&{/soc} {
|
|
||||||
#address-cells = <2>;
|
|
||||||
#size-cells = <2>;
|
|
||||||
|
|
||||||
lvds@feb90000 {
|
|
||||||
compatible = "renesas,r8a7795-lvds";
|
|
||||||
reg = <0 0xfeb90000 0 0x14>;
|
|
||||||
|
|
||||||
ports {
|
|
||||||
#address-cells = <1>;
|
|
||||||
#size-cells = <0>;
|
|
||||||
|
|
||||||
port@0 {
|
|
||||||
reg = <0>;
|
|
||||||
lvds0_input: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
port@1 {
|
|
||||||
reg = <1>;
|
|
||||||
lvds0_out: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
&{/soc/display@feb00000/ports} {
|
|
||||||
port@3 {
|
|
||||||
endpoint {
|
|
||||||
remote-endpoint = <&lvds0_input>;
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
@ -1,43 +0,0 @@
|
|||||||
// SPDX-License-Identifier: GPL-2.0
|
|
||||||
/*
|
|
||||||
* rcar_du_of_lvds_r8a7796.dts - Legacy LVDS DT bindings conversion for R8A7796
|
|
||||||
*
|
|
||||||
* Copyright (C) 2018 Laurent Pinchart <laurent.pinchart@ideasonboard.com>
|
|
||||||
*/
|
|
||||||
|
|
||||||
/dts-v1/;
|
|
||||||
/plugin/;
|
|
||||||
|
|
||||||
&{/soc} {
|
|
||||||
#address-cells = <2>;
|
|
||||||
#size-cells = <2>;
|
|
||||||
|
|
||||||
lvds@feb90000 {
|
|
||||||
compatible = "renesas,r8a7796-lvds";
|
|
||||||
reg = <0 0xfeb90000 0 0x14>;
|
|
||||||
|
|
||||||
ports {
|
|
||||||
#address-cells = <1>;
|
|
||||||
#size-cells = <0>;
|
|
||||||
|
|
||||||
port@0 {
|
|
||||||
reg = <0>;
|
|
||||||
lvds0_input: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
port@1 {
|
|
||||||
reg = <1>;
|
|
||||||
lvds0_out: endpoint {
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
|
|
||||||
&{/soc/display@feb00000/ports} {
|
|
||||||
port@3 {
|
|
||||||
endpoint {
|
|
||||||
remote-endpoint = <&lvds0_input>;
|
|
||||||
};
|
|
||||||
};
|
|
||||||
};
|
|
||||||
Loading…
Reference in New Issue
Block a user