On Wed, Feb 14, 2018 at 6:04 PM, Laurent Pinchart
<laurent.pinchart+rene...@ideasonboard.com> wrote:
> The internal LVDS encoders now have their own DT bindings. Before
> switching the driver infrastructure to those new bindings, implement
> backward-compatibility through live DT patching.
>
> Patching is disabled and will be enabled along with support for the new
> DT bindings in the DU driver.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
> ---
> Changes since v2:
>
> - Update the SPDX headers to use C-style comments in header files
> - Removed the manually created __local_fixups__ node
> - Perform manual fixups on live DT instead of overlay
Generally looks fine to me. A few things below.
>
> Changes since v1:
>
> - Select OF_FLATTREE
> - Compile LVDS DT bindings patch code when DRM_RCAR_LVDS is selected
> - Update the SPDX headers to use GPL-2.0 instead of GPL-2.0-only
> - Turn __dtb_rcar_du_of_lvds_(begin|end) from u8 to char
> - Pass void begin and end pointers to rcar_du_of_get_overlay()
> - Use of_get_parent() instead of accessing the parent pointer directly
> - Find the LVDS endpoints nodes based on the LVDS node instead of the
> root of the overlay
> - Update to the <soc>-lvds compatible string format
> ---
> drivers/gpu/drm/rcar-du/Kconfig | 2 +
> drivers/gpu/drm/rcar-du/Makefile | 7 +-
> drivers/gpu/drm/rcar-du/rcar_du_of.c | 374
> +++++++++++++++++++++
> drivers/gpu/drm/rcar-du/rcar_du_of.h | 20 ++
> .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts | 81 +++++
> .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts | 55 +++
> .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts | 55 +++
> .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts | 55 +++
> .../gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts | 55 +++
> 9 files changed, 703 insertions(+), 1 deletion(-)
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of.c
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of.h
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
> create mode 100644 drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
>
> diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig
> index 5d0b4b7119af..3f83352a7313 100644
> --- a/drivers/gpu/drm/rcar-du/Kconfig
> +++ b/drivers/gpu/drm/rcar-du/Kconfig
> @@ -22,6 +22,8 @@ config DRM_RCAR_LVDS
> bool "R-Car DU LVDS Encoder Support"
> depends on DRM_RCAR_DU
> select DRM_PANEL
> + select OF_FLATTREE
> + select OF_OVERLAY
> help
> Enable support for the R-Car Display Unit embedded LVDS encoders.
>
> diff --git a/drivers/gpu/drm/rcar-du/Makefile
> b/drivers/gpu/drm/rcar-du/Makefile
> index 0cf5c11030e8..86b337b4be5d 100644
> --- a/drivers/gpu/drm/rcar-du/Makefile
> +++ b/drivers/gpu/drm/rcar-du/Makefile
> @@ -8,7 +8,12 @@ rcar-du-drm-y := rcar_du_crtc.o \
> rcar_du_plane.o
>
> rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_lvdsenc.o
> -
> +rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_of.o \
> + rcar_du_of_lvds_r8a7790.dtb.o \
> + rcar_du_of_lvds_r8a7791.dtb.o \
> + rcar_du_of_lvds_r8a7793.dtb.o \
> + rcar_du_of_lvds_r8a7795.dtb.o \
> + rcar_du_of_lvds_r8a7796.dtb.o
> rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
>
> obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.c
> b/drivers/gpu/drm/rcar-du/rcar_du_of.c
> new file mode 100644
> index 000000000000..141f6eda6e98
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of.c
> @@ -0,0 +1,374 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * rcar_du_of.c - Legacy DT bindings compatibility
> + *
> + * Copyright (C) 2018 Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsa...@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <linux/init.h>
> +#include <linux/kernel.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_fdt.h>
> +#include <linux/of_graph.h>
> +#include <linux/slab.h>
> +
> +#include "rcar_du_crtc.h"
> +#include "rcar_du_drv.h"
> +
> +/*
> -----------------------------------------------------------------------------
> + * Generic Overlay Handling
> + */
> +
> +struct rcar_du_of_overlay {
> + const char *compatible;
> + void *begin;
> + void *end;
> +};
> +
> +#define RCAR_DU_OF_DTB(type, soc) \
> + extern char __dtb_rcar_du_of_##type##_##soc##_begin[]; \
> + extern char __dtb_rcar_du_of_##type##_##soc##_end[]
> +
> +#define RCAR_DU_OF_OVERLAY(type, soc) \
> + { \
> + .compatible = "renesas,du-" #soc, \
> + .begin = __dtb_rcar_du_of_##type##_##soc##_begin, \
> + .end = __dtb_rcar_du_of_##type##_##soc##_end, \
> + }
> +
> +static int __init rcar_du_of_apply_overlay(const struct rcar_du_of_overlay
> *dtbs,
> + const char *compatible)
> +{
> + const struct rcar_du_of_overlay *dtb = NULL;
> + struct device_node *node = NULL;
> + unsigned int i;
> + int ovcs_id;
> + void *data;
> + void *mem;
> + int ret;
> +
> + for (i = 0; dtbs[i].compatible; ++i) {
> + if (!strcmp(dtbs[i].compatible, compatible)) {
> + dtb = &dtbs[i];
> + break;
> + }
> + }
> +
> + if (!dtb)
> + return -ENODEV;
> +
> + data = kmemdup(dtb->begin, dtb->end - dtb->begin, GFP_KERNEL);
> + if (!data)
> + return -ENOMEM;
> +
> + mem = of_fdt_unflatten_tree(data, NULL, &node);
> + if (!mem) {
> + ret = -ENOMEM;
> + goto done;
> + }
> +
> + ovcs_id = 0;
> + ret = of_overlay_apply(node, &ovcs_id);
> +
> +done:
> + of_node_put(node);
> + kfree(data);
> + kfree(mem);
> +
> + return ret;
> +}
> +
> +static struct device_node __init *
> +rcar_du_of_find_node_by_path(struct device_node *parent, const char *path)
> +{
I guess I never followed up on the last version. I think a wrapper
around __of_find_node_by_path would work for you here. It can start at
any level. Though maybe it is not needed. See below.
> + parent = of_node_get(parent);
> + if (!parent)
> + return NULL;
> +
> + while (parent && *path == '/') {
> + struct device_node *child = NULL;
> + struct device_node *node;
> + const char *next;
> + size_t len;
> +
> + /* Skip the initial '/' delimiter and find the next one. */
> + path++;
> + next = strchrnul(path, '/');
> + len = next - path;
> + if (!len)
> + goto error;
> +
> + for_each_child_of_node(parent, node) {
> + const char *name = kbasename(node->full_name);
> +
> + if (strncmp(path, name, len) == 0 &&
> + strlen(name) == len) {
> + child = node;
> + break;
> + }
> + }
> +
> + if (!child)
> + goto error;
> +
> + of_node_put(parent);
> + parent = child;
> + path = next;
> + }
> +
> + return parent;
> +
> +error:
> + of_node_put(parent);
> + return NULL;
> +}
> +
> +static int __init rcar_du_of_add_property(struct device_node *np,
> + const char *name, const void *value,
> + size_t length)
So, were you going to revive Pantelis' patch or move this to the core?
> +{
> + struct property *prop;
> +
> + prop = kzalloc(sizeof(*prop), GFP_KERNEL);
> + if (!prop)
> + return -ENOMEM;
> +
> + prop->name = kstrdup(name, GFP_KERNEL);
> + prop->value = kmemdup(value, length, GFP_KERNEL);
> + prop->length = length;
> +
> + if (!prop->name || !prop->value) {
> + kfree(prop->name);
> + kfree(prop->value);
> + kfree(prop);
> + return -ENOMEM;
> + }
> +
> + of_property_set_flag(prop, OF_DYNAMIC);
> +
> + prop->next = np->properties;
> + np->properties = prop;
> +
> + return 0;
> +}
> +
> +/*
> -----------------------------------------------------------------------------
> + * LVDS Overlays
> + */
> +
> +RCAR_DU_OF_DTB(lvds, r8a7790);
> +RCAR_DU_OF_DTB(lvds, r8a7791);
> +RCAR_DU_OF_DTB(lvds, r8a7793);
> +RCAR_DU_OF_DTB(lvds, r8a7795);
> +RCAR_DU_OF_DTB(lvds, r8a7796);
> +
> +static const struct rcar_du_of_overlay rcar_du_lvds_overlays[] __initconst =
> {
> + RCAR_DU_OF_OVERLAY(lvds, r8a7790),
> + RCAR_DU_OF_OVERLAY(lvds, r8a7791),
> + RCAR_DU_OF_OVERLAY(lvds, r8a7793),
> + RCAR_DU_OF_OVERLAY(lvds, r8a7795),
> + RCAR_DU_OF_OVERLAY(lvds, r8a7796),
> + { /* Sentinel */ },
> +};
> +
> +static void __init rcar_du_of_lvds_patch_one(struct device_node *lvds,
> + const struct of_phandle_args
> *clk,
> + struct device_node *local,
> + struct device_node *remote)
> +{
> + struct device_node *endpoints[2];
> + unsigned int psize;
> + unsigned int i;
> + __be32 value[4];
> + int ret;
> +
> + /*
> + * Set the LVDS clocks property. This can't be performed by the
> overlay
> + * as the structure of the clock specifier has changed over time, and
> we
> + * don't know at compile time which binding version the system we will
> + * run on uses.
> + */
> + if (clk->args_count >= ARRAY_SIZE(value) - 1)
> + return;
> +
> + value[0] = cpu_to_be32(clk->np->phandle);
> + for (i = 0; i < clk->args_count; ++i)
> + value[i + 1] = cpu_to_be32(clk->args[i]);
> +
> + psize = (clk->args_count + 1) * 4;
> + ret = rcar_du_of_add_property(lvds, "clocks", value, psize);
> + if (ret < 0)
> + return;
> +
> + /*
> + * Insert the node in the OF graph: patch the LVDS ports
> remote-endpoint
> + * properties to point to the endpoints of the sibling nodes in the
> + * graph. This can't be performed by the overlay: on the input side
> the
> + * overlay would contain a phandle for the DU LVDS output port that
> + * would clash with the system DT, and on the output side the
> connection
> + * is board-specific.
> + */
> + endpoints[0] = rcar_du_of_find_node_by_path(lvds,
> + "/ports/port@0/endpoint");
of_graph_get_endpoint_by_regs() should work here instead or am I
missing something?
> + endpoints[1] = rcar_du_of_find_node_by_path(lvds,
> + "/ports/port@1/endpoint");
> + if (!endpoints[0] || !endpoints[1])
> + return;
> +
> + value[0] = cpu_to_be32(local->phandle);
> + ret = rcar_du_of_add_property(endpoints[0], "remote-endpoint",
> + value, 4);
s/4/sizeof(__be32)/
> + if (ret < 0)
> + goto done;
> +
> + value[0] = cpu_to_be32(remote->phandle);
> + ret = rcar_du_of_add_property(endpoints[1], "remote-endpoint",
> + value, 4);
> + if (ret < 0)
> + goto done;
> +
> +done:
> + of_node_put(endpoints[0]);
> + of_node_put(endpoints[1]);
> +}
> +
> +struct lvds_of_data {
> + struct resource res;
> + struct of_phandle_args clkspec;
> + struct device_node *local;
> + struct device_node *remote;
> +};
> +
> +static void __init rcar_du_of_lvds_patch(const struct of_device_id *of_ids)
> +{
> + const struct rcar_du_device_info *info;
> + const struct of_device_id *match;
> + struct lvds_of_data lvds_data[2] = { };
> + struct device_node *lvds_node;
> + struct device_node *soc_node;
> + struct device_node *du_node;
> + char compatible[21];
> + const char *soc_name;
> + unsigned int i;
> + int ret;
> +
> + /* Get the DU node and exit if not present or disabled. */
> + du_node = of_find_matching_node_and_match(NULL, of_ids, &match);
> + if (!du_node || !of_device_is_available(du_node)) {
> + of_node_put(du_node);
> + return;
> + }
> +
> + info = match->data;
> + soc_node = of_get_parent(du_node);
> +
> + if (WARN_ON(info->num_lvds > ARRAY_SIZE(lvds_data)))
> + goto done;
> +
> + /*
> + * Skip if the LVDS nodes already exists.
> + *
> + * The nodes are searched based on the compatible string, which we
> + * construct from the SoC name found in the DU compatible string. As a
> + * match has been found we know the compatible string matches the
> + * expected format and can thus skip some of the string manipulation
> + * normal safety checks.
> + */
> + soc_name = strchr(match->compatible, '-') + 1;
> + sprintf(compatible, "renesas,%s-lvds", soc_name);
> + lvds_node = of_find_compatible_node(NULL, NULL, compatible);
> + if (lvds_node) {
> + of_node_put(lvds_node);
> + return;
> + }
> +
> + /*
> + * Parse the DU node and store the register specifier, the clock
> + * specifier and the local and remote endpoint of the LVDS link for
> + * later use.
> + */
> + for (i = 0; i < info->num_lvds; ++i) {
> + struct lvds_of_data *lvds = &lvds_data[i];
> + unsigned int port;
> + char name[7];
> + int index;
> +
> + sprintf(name, "lvds.%u", i);
> + index = of_property_match_string(du_node, "clock-names",
> name);
> + if (index < 0)
> + continue;
> +
> + ret = of_parse_phandle_with_args(du_node, "clocks",
> + "#clock-cells", index,
> + &lvds->clkspec);
> + if (ret < 0)
> + continue;
> +
> + port = info->routes[RCAR_DU_OUTPUT_LVDS0 + i].port;
> +
> + lvds->local = of_graph_get_endpoint_by_regs(du_node, port, 0);
> + if (!lvds->local)
> + continue;
> +
> + lvds->remote = of_graph_get_remote_endpoint(lvds->local);
> + if (!lvds->remote)
> + continue;
> +
> + index = of_property_match_string(du_node, "reg-names", name);
> + if (index < 0)
> + continue;
> +
> + of_address_to_resource(du_node, index, &lvds->res);
> + }
> +
> + /* Parse and apply the overlay. This will resolve phandles. */
> + ret = rcar_du_of_apply_overlay(rcar_du_lvds_overlays,
> + match->compatible);
> + if (ret < 0)
> + goto done;
> +
> + /* Patch the newly created LVDS encoder nodes. */
> + for_each_child_of_node(soc_node, lvds_node) {
> + struct resource res;
> +
> + if (!of_device_is_compatible(lvds_node, compatible))
> + continue;
> +
> + /* Locate the lvds_data entry based on the resource start. */
> + ret = of_address_to_resource(lvds_node, 0, &res);
> + if (ret < 0)
> + continue;
> +
> + for (i = 0; i < ARRAY_SIZE(lvds_data); ++i) {
> + if (lvds_data[i].res.start == res.start)
> + break;
> + }
> +
> + if (i == ARRAY_SIZE(lvds_data))
> + continue;
> +
> + /* Patch the LVDS encoder. */
> + 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);
> +}
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of.h
> b/drivers/gpu/drm/rcar-du/rcar_du_of.h
> new file mode 100644
> index 000000000000..c2e65a727e91
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of.h
> @@ -0,0 +1,20 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * rcar_du_of.h - Legacy DT bindings compatibility
> + *
> + * Copyright (C) 2018 Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> + */
> +#ifndef __RCAR_DU_OF_H__
> +#define __RCAR_DU_OF_H__
> +
> +#include <linux/init.h>
> +
> +struct of_device_id;
> +
> +#ifdef 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__ */
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> new file mode 100644
> index 000000000000..6ebb355b652a
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7790.dts
> @@ -0,0 +1,81 @@
> +// 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.pinch...@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsa...@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <dt-bindings/clock/renesas-cpg-mssr.h>
> +
> +/dts-v1/;
> +/plugin/;
> +/ {
> + fragment@0 {
> + target-path = "/";
> + __overlay__ {
> + #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 {
> + };
> + };
> + };
> + };
> + };
> + };
> +
> + fragment@1 {
> + target-path = "/display@feb00000/ports";
> + __overlay__ {
> + port@1 {
> + endpoint {
> + remote-endpoint = <&lvds0_input>;
> + };
> + };
> + port@2 {
> + endpoint {
> + remote-endpoint = <&lvds1_input>;
> + };
> + };
> + };
> + };
> +};
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
> b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
> new file mode 100644
> index 000000000000..601982bba27d
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7791.dts
> @@ -0,0 +1,55 @@
> +// 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.pinch...@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsa...@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <dt-bindings/clock/renesas-cpg-mssr.h>
> +
> +/dts-v1/;
> +/plugin/;
> +/ {
> + fragment@0 {
> + target-path = "/";
> + __overlay__ {
> + #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 {
> + };
> + };
> + };
> + };
> + };
> + };
> +
> + fragment@1 {
> + target-path = "/display@feb00000/ports";
> + __overlay__ {
> + port@1 {
> + endpoint {
> + remote-endpoint = <&lvds0_input>;
> + };
> + };
> + };
> + };
> +};
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
> b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
> new file mode 100644
> index 000000000000..1c535954a529
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7793.dts
> @@ -0,0 +1,55 @@
> +// 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.pinch...@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsa...@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <dt-bindings/clock/renesas-cpg-mssr.h>
> +
> +/dts-v1/;
> +/plugin/;
> +/ {
> + fragment@0 {
> + target-path = "/";
> + __overlay__ {
> + #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 {
> + };
> + };
> + };
> + };
> + };
> + };
> +
> + fragment@1 {
> + target-path = "/display@feb00000/ports";
> + __overlay__ {
> + port@1 {
> + endpoint {
> + remote-endpoint = <&lvds0_input>;
> + };
> + };
> + };
> + };
> +};
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
> b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
> new file mode 100644
> index 000000000000..44e52101ef05
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7795.dts
> @@ -0,0 +1,55 @@
> +// 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.pinch...@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsa...@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <dt-bindings/clock/renesas-cpg-mssr.h>
> +
> +/dts-v1/;
> +/plugin/;
> +/ {
> + fragment@0 {
> + target-path = "/soc";
> + __overlay__ {
> + #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 {
> + };
> + };
> + };
> + };
> + };
> + };
> +
> + fragment@1 {
> + target-path = "/soc/display@feb00000/ports";
> + __overlay__ {
> + port@3 {
> + endpoint {
> + remote-endpoint = <&lvds0_input>;
> + };
> + };
> + };
> + };
> +};
> diff --git a/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
> b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
> new file mode 100644
> index 000000000000..8f45ebe140bd
> --- /dev/null
> +++ b/drivers/gpu/drm/rcar-du/rcar_du_of_lvds_r8a7796.dts
> @@ -0,0 +1,55 @@
> +// 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.pinch...@ideasonboard.com>
> + *
> + * Based on work from Jyri Sarha <jsa...@ti.com>
> + * Copyright (C) 2015 Texas Instruments
> + */
> +
> +#include <dt-bindings/clock/renesas-cpg-mssr.h>
> +
> +/dts-v1/;
> +/plugin/;
> +/ {
> + fragment@0 {
> + target-path = "/soc";
> + __overlay__ {
> + #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 {
> + };
> + };
> + };
> + };
> + };
> + };
> +
> + fragment@1 {
> + target-path = "/soc/display@feb00000/ports";
> + __overlay__ {
> + port@3 {
> + endpoint {
> + remote-endpoint = <&lvds0_input>;
> + };
> + };
> + };
> + };
> +};
> --
> Regards,
>
> Laurent Pinchart
>
