Commit 1cee3bce authored by Dave Airlie's avatar Dave Airlie

Merge tag 'tilcdc-4.15-fixes' of https://github.com/jsarha/linux into drm-next

tilcdc fixes for v4.15

* tag 'tilcdc-4.15-fixes' of https://github.com/jsarha/linux:
  drm/tilcdc: Remove obsolete "ti,tilcdc,slave" dts binding support
parents 9cae7751 739acd85
......@@ -12,14 +12,3 @@ config DRM_TILCDC
controller, for example AM33xx in beagle-bone, DA8xx, or
OMAP-L1xx. This driver replaces the FB_DA8XX fbdev driver.
config DRM_TILCDC_SLAVE_COMPAT
bool "Support device tree blobs using TI LCDC Slave binding"
depends on DRM_TILCDC
default y
select OF_RESOLVE
select OF_OVERLAY
help
Choose this option if you need a kernel that is compatible
with device tree blobs using the obsolete "ti,tilcdc,slave"
binding. If you find "ti,tilcdc,slave"-string from your DTB,
you probably need this. Otherwise you do not.
......@@ -2,9 +2,6 @@ ifeq (, $(findstring -W,$(EXTRA_CFLAGS)))
ccflags-y += -Werror
endif
obj-$(CONFIG_DRM_TILCDC_SLAVE_COMPAT) += tilcdc_slave_compat.o \
tilcdc_slave_compat.dtb.o
tilcdc-y := \
tilcdc_plane.o \
tilcdc_crtc.o \
......
/*
* Copyright (C) 2015 Texas Instruments
* Author: Jyri Sarha <jsarha@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
*/
/*
* To support the old "ti,tilcdc,slave" binding the binding has to be
* transformed to the new external encoder binding.
*/
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/of_fdt.h>
#include <linux/slab.h>
#include <linux/list.h>
#include "tilcdc_slave_compat.h"
struct kfree_table {
int total;
int num;
void **table;
};
static int __init kfree_table_init(struct kfree_table *kft)
{
kft->total = 32;
kft->num = 0;
kft->table = kmalloc(kft->total * sizeof(*kft->table),
GFP_KERNEL);
if (!kft->table)
return -ENOMEM;
return 0;
}
static int __init kfree_table_add(struct kfree_table *kft, void *p)
{
if (kft->num == kft->total) {
void **old = kft->table;
kft->total *= 2;
kft->table = krealloc(old, kft->total * sizeof(*kft->table),
GFP_KERNEL);
if (!kft->table) {
kft->table = old;
kfree(p);
return -ENOMEM;
}
}
kft->table[kft->num++] = p;
return 0;
}
static void __init kfree_table_free(struct kfree_table *kft)
{
int i;
for (i = 0; i < kft->num; i++)
kfree(kft->table[i]);
kfree(kft->table);
}
static
struct property * __init tilcdc_prop_dup(const struct property *prop,
struct kfree_table *kft)
{
struct property *nprop;
nprop = kzalloc(sizeof(*nprop), GFP_KERNEL);
if (!nprop || kfree_table_add(kft, nprop))
return NULL;
nprop->name = kstrdup(prop->name, GFP_KERNEL);
if (!nprop->name || kfree_table_add(kft, nprop->name))
return NULL;
nprop->value = kmemdup(prop->value, prop->length, GFP_KERNEL);
if (!nprop->value || kfree_table_add(kft, nprop->value))
return NULL;
nprop->length = prop->length;
return nprop;
}
static void __init tilcdc_copy_props(struct device_node *from,
struct device_node *to,
const char * const props[],
struct kfree_table *kft)
{
struct property *prop;
int i;
for (i = 0; props[i]; i++) {
prop = of_find_property(from, props[i], NULL);
if (!prop)
continue;
prop = tilcdc_prop_dup(prop, kft);
if (!prop)
continue;
prop->next = to->properties;
to->properties = prop;
}
}
static int __init tilcdc_prop_str_update(struct property *prop,
const char *str,
struct kfree_table *kft)
{
prop->value = kstrdup(str, GFP_KERNEL);
if (kfree_table_add(kft, prop->value) || !prop->value)
return -ENOMEM;
prop->length = strlen(str)+1;
return 0;
}
static void __init tilcdc_node_disable(struct device_node *node)
{
struct property *prop;
prop = kzalloc(sizeof(*prop), GFP_KERNEL);
if (!prop)
return;
prop->name = "status";
prop->value = "disabled";
prop->length = strlen((char *)prop->value)+1;
of_update_property(node, prop);
}
static struct device_node * __init tilcdc_get_overlay(struct kfree_table *kft)
{
const int size = __dtb_tilcdc_slave_compat_end -
__dtb_tilcdc_slave_compat_begin;
static void *overlay_data;
struct device_node *overlay;
int ret;
if (!size) {
pr_warn("%s: No overlay data\n", __func__);
return NULL;
}
overlay_data = kmemdup(__dtb_tilcdc_slave_compat_begin,
size, GFP_KERNEL);
if (!overlay_data || kfree_table_add(kft, overlay_data))
return NULL;
of_fdt_unflatten_tree(overlay_data, NULL, &overlay);
if (!overlay) {
pr_warn("%s: Unfattening overlay tree failed\n", __func__);
return NULL;
}
ret = of_resolve_phandles(overlay);
if (ret) {
pr_err("%s: Failed to resolve phandles: %d\n", __func__, ret);
return NULL;
}
return overlay;
}
static const struct of_device_id tilcdc_slave_of_match[] __initconst = {
{ .compatible = "ti,tilcdc,slave", },
{},
};
static const struct of_device_id tilcdc_of_match[] __initconst = {
{ .compatible = "ti,am33xx-tilcdc", },
{},
};
static const struct of_device_id tilcdc_tda998x_of_match[] __initconst = {
{ .compatible = "nxp,tda998x", },
{},
};
static const char * const tilcdc_slave_props[] __initconst = {
"pinctrl-names",
"pinctrl-0",
"pinctrl-1",
NULL
};
static void __init tilcdc_convert_slave_node(void)
{
struct device_node *slave = NULL, *lcdc = NULL;
struct device_node *i2c = NULL, *fragment = NULL;
struct device_node *overlay, *encoder;
struct property *prop;
/* For all memory needed for the overlay tree. This memory can
be freed after the overlay has been applied. */
struct kfree_table kft;
int ret;
if (kfree_table_init(&kft))
return;
lcdc = of_find_matching_node(NULL, tilcdc_of_match);
slave = of_find_matching_node(NULL, tilcdc_slave_of_match);
if (!slave || !of_device_is_available(lcdc))
goto out;
i2c = of_parse_phandle(slave, "i2c", 0);
if (!i2c) {
pr_err("%s: Can't find i2c node trough phandle\n", __func__);
goto out;
}
overlay = tilcdc_get_overlay(&kft);
if (!overlay)
goto out;
encoder = of_find_matching_node(overlay, tilcdc_tda998x_of_match);
if (!encoder) {
pr_err("%s: Failed to find tda998x node\n", __func__);
goto out;
}
tilcdc_copy_props(slave, encoder, tilcdc_slave_props, &kft);
for_each_child_of_node(overlay, fragment) {
prop = of_find_property(fragment, "target-path", NULL);
if (!prop)
continue;
if (!strncmp("i2c", (char *)prop->value, prop->length))
if (tilcdc_prop_str_update(prop, i2c->full_name, &kft))
goto out;
if (!strncmp("lcdc", (char *)prop->value, prop->length))
if (tilcdc_prop_str_update(prop, lcdc->full_name, &kft))
goto out;
}
tilcdc_node_disable(slave);
ret = of_overlay_create(overlay);
if (ret)
pr_err("%s: Creating overlay failed: %d\n", __func__, ret);
else
pr_info("%s: ti,tilcdc,slave node successfully converted\n",
__func__);
out:
kfree_table_free(&kft);
of_node_put(i2c);
of_node_put(slave);
of_node_put(lcdc);
of_node_put(fragment);
}
static int __init tilcdc_slave_compat_init(void)
{
tilcdc_convert_slave_node();
return 0;
}
subsys_initcall(tilcdc_slave_compat_init);
/*
* DTS overlay for converting ti,tilcdc,slave binding to new binding.
*
* Copyright (C) 2015 Texas Instruments Inc.
* Author: Jyri Sarha <jsarha@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*/
/*
* target-path property values are simple tags that are replaced with
* correct values in tildcdc_slave_compat.c. Some properties are also
* copied over from the ti,tilcdc,slave node.
*/
/dts-v1/;
/ {
fragment@0 {
target-path = "i2c";
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
tda19988 {
compatible = "nxp,tda998x";
reg = <0x70>;
status = "okay";
port {
hdmi_0: endpoint@0 {
remote-endpoint = <&lcd_0>;
};
};
};
};
};
fragment@1 {
target-path = "lcdc";
__overlay__ {
port {
lcd_0: endpoint@0 {
remote-endpoint = <&hdmi_0>;
};
};
};
};
__local_fixups__ {
fragment@0 {
__overlay__ {
tda19988 {
port {
endpoint@0 {
remote-endpoint = <0>;
};
};
};
};
};
fragment@1 {
__overlay__ {
port {
endpoint@0 {
remote-endpoint = <0>;
};
};
};
};
};
};
/*
* Copyright (C) 2015 Texas Instruments
* Author: Jyri Sarha <jsarha@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* This header declares the symbols defined in tilcdc_slave_compat.dts */
#ifndef __TILCDC_SLAVE_COMPAT_H__
#define __TILCDC_SLAVE_COMPAT_H__
extern uint8_t __dtb_tilcdc_slave_compat_begin[];
extern uint8_t __dtb_tilcdc_slave_compat_end[];
#endif /* __TILCDC_SLAVE_COMPAT_H__ */
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