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/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only 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.
*/
#define pr_fmt(fmt) "sde-kms_utils:[%s] " fmt, __func__
#include "sde_kms.h"
void sde_kms_info_reset(struct sde_kms_info *info)
{
if (info) {
info->len = 0;
info->staged_len = 0;
}
}
void sde_kms_info_add_keyint(struct sde_kms_info *info,
const char *key,
int32_t value)
{
uint32_t len;
if (info && key) {
len = snprintf(info->data + info->len,
SDE_KMS_INFO_MAX_SIZE - info->len,
"%s=%d\n",
key,
value);
/* check if snprintf truncated the string */
if ((info->len + len) < SDE_KMS_INFO_MAX_SIZE)
info->len += len;
}
}
void sde_kms_info_update_keystr(char *info_str,
const char *key,
int32_t value)
{
char *str, *temp, *append_str;
uint32_t dst_len = 0, prefix_len = 0;
char c;
int32_t size = 0;
if (info_str && key) {
str = strnstr(info_str, key, strlen(info_str));
if (str) {
temp = str + strlen(key);
c = *temp;
while (c != '\n') {
dst_len++;
c = *(++temp);
}
/*
* If input key string to update is exactly the last
* string in source string, no need to allocate one
* memory to store the string after string key. Just
* replace the value of the last string.
*
* If it is not, allocate one new memory to save
* the string after string key+"\n". This new allocated
* string will be appended to the whole source string
* after key value is updated.
*/
size = strlen(str) - strlen(key) - dst_len - 1;
if (size > 0) {
append_str = kzalloc(size + 1, GFP_KERNEL);
if (!append_str) {
SDE_ERROR("failed to alloc memory\n");
return;
}
memcpy(append_str,
str + strlen(key) + dst_len + 1, size);
}
prefix_len = strlen(info_str) - strlen(str);
/* Update string with new value for the string key. */
snprintf(info_str + prefix_len,
SDE_KMS_INFO_MAX_SIZE - prefix_len,
"%s%d\n", key, value);
/* Append the string save aboved. */
if (size > 0 && append_str) {
size = prefix_len + strlen(key) + dst_len + 1;
snprintf(info_str + size,
SDE_KMS_INFO_MAX_SIZE - size,
"%s", append_str);
kfree(append_str);
}
}
}
}
void sde_kms_info_add_keystr(struct sde_kms_info *info,
const char *key,
const char *value)
{
uint32_t len;
if (info && key && value) {
len = snprintf(info->data + info->len,
SDE_KMS_INFO_MAX_SIZE - info->len,
"%s=%s\n",
key,
value);
/* check if snprintf truncated the string */
if ((info->len + len) < SDE_KMS_INFO_MAX_SIZE)
info->len += len;
}
}
void sde_kms_info_start(struct sde_kms_info *info,
const char *key)
{
uint32_t len;
if (info && key) {
len = snprintf(info->data + info->len,
SDE_KMS_INFO_MAX_SIZE - info->len,
"%s=",
key);
info->start = true;
/* check if snprintf truncated the string */
if ((info->len + len) < SDE_KMS_INFO_MAX_SIZE)
info->staged_len = info->len + len;
}
}
void sde_kms_info_append(struct sde_kms_info *info,
const char *str)
{
uint32_t len;
if (info) {
len = snprintf(info->data + info->staged_len,
SDE_KMS_INFO_MAX_SIZE - info->staged_len,
"%s",
str);
/* check if snprintf truncated the string */
if ((info->staged_len + len) < SDE_KMS_INFO_MAX_SIZE) {
info->staged_len += len;
info->start = false;
}
}
}
void sde_kms_info_append_format(struct sde_kms_info *info,
uint32_t pixel_format,
uint64_t modifier)
{
uint32_t len;
if (!info)
return;
if (modifier) {
len = snprintf(info->data + info->staged_len,
SDE_KMS_INFO_MAX_SIZE - info->staged_len,
info->start ?
"%c%c%c%c/%llX/%llX" : " %c%c%c%c/%llX/%llX",
(pixel_format >> 0) & 0xFF,
(pixel_format >> 8) & 0xFF,
(pixel_format >> 16) & 0xFF,
(pixel_format >> 24) & 0xFF,
(modifier >> 56) & 0xFF,
modifier & ((1ULL << 56) - 1));
} else {
len = snprintf(info->data + info->staged_len,
SDE_KMS_INFO_MAX_SIZE - info->staged_len,
info->start ?
"%c%c%c%c" : " %c%c%c%c",
(pixel_format >> 0) & 0xFF,
(pixel_format >> 8) & 0xFF,
(pixel_format >> 16) & 0xFF,
(pixel_format >> 24) & 0xFF);
}
/* check if snprintf truncated the string */
if ((info->staged_len + len) < SDE_KMS_INFO_MAX_SIZE) {
info->staged_len += len;
info->start = false;
}
}
void sde_kms_info_stop(struct sde_kms_info *info)
{
uint32_t len;
if (info) {
/* insert final delimiter */
len = snprintf(info->data + info->staged_len,
SDE_KMS_INFO_MAX_SIZE - info->staged_len,
"\n");
/* check if snprintf truncated the string */
if ((info->staged_len + len) < SDE_KMS_INFO_MAX_SIZE)
info->len = info->staged_len + len;
}
}
void sde_kms_rect_intersect(const struct sde_rect *r1,
const struct sde_rect *r2,
struct sde_rect *result)
{
int l, t, r, b;
if (!r1 || !r2 || !result)
return;
l = max(r1->x, r2->x);
t = max(r1->y, r2->y);
r = min((r1->x + r1->w), (r2->x + r2->w));
b = min((r1->y + r1->h), (r2->y + r2->h));
if (r < l || b < t) {
memset(result, 0, sizeof(*result));
} else {
result->x = l;
result->y = t;
result->w = r - l;
result->h = b - t;
}
}
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