/*
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* drivers/video/sunxi/bootGUI/hdmi_manage.c
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*
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* Copyright (c) 2007-2019 Allwinnertech Co., Ltd.
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* Author: zhengxiaobin <zhengxiaobin@allwinnertech.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include "dev_manage.h"
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#include "hdmi_manage.h"
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#include "video_hal.h"
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#include "video_misc_hal.h"
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#define EDID_LENGTH 0x80
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#define ID_VENDOR 0x08
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#define VENDOR_INFO_SIZE 10
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#define DISPLAY_PARTITION_NAME "Reserve0"
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enum {
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ALWAYS_NOT_CHECK_MODE = 0,
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ALWAYS_CHECK_MODE,
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CHECK_MODE_ONLY_IF_SAME_TV,
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};
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#if 0
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static int get_mode_check_policy(int def_check)
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{
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disp_getprop_by_name(get_disp_fdt_node(), "hdmi_mode_check",
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(uint32_t *)&def_check, def_check);
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return def_check;
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}
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/*
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* the format of saved vendor id is string of hex:
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* "data[0],data[1],...,data[9],".
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*/
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static int get_saved_vendor_id(char *vendor_id, int num)
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{
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char data_buf[64] = {0};
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char *p = data_buf;
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char *pdata = data_buf;
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char *p_end;
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int len = 0;
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int i;
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len = hal_fat_fsload(DISPLAY_PARTITION_NAME,
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"tv_vdid.fex", data_buf, sizeof(data_buf));
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if (0 >= len)
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return 0;
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i = 0;
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p_end = p + len;
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for (; p < p_end; ++p) {
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if (',' == *p) {
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*p = '\0';
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vendor_id[i] = (char)simple_strtoul(pdata, NULL, 16);
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++i;
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if (i >= num)
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break;
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pdata = p + 1;
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}
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}
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return i;
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}
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static int is_same_vendor(unsigned char *edid_buf,
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char *vendor, int num)
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{
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int i;
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char *pdata = (char *)edid_buf + ID_VENDOR;
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for (i = 0; i < num; ++i) {
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if (pdata[i] != vendor[i]) {
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printf("different vendor[current <-> saved]\n");
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for (i = 0; i < num; ++i) {
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printf("[%x <-> %x]\n", pdata[i], vendor[i]);
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}
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return 0;
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}
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}
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printf("same vendor\n");
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return !0;
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}
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static int edid_checksum(char const *edid_buf)
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{
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char csum = 0;
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char all_null = 0;
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int i = 0;
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for (i = 0; i < EDID_LENGTH; i++) {
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csum += edid_buf[i];
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all_null |= edid_buf[i];
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}
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if (csum == 0x00 && all_null) {
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/* checksum passed, everything's good */
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return 0;
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} else if (all_null) {
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printf("edid all null\n");
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return -2;
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} else {
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printf("edid checksum err\n");
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return -1;
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}
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}
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#endif
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int hdmi_verify_mode(int channel, int mode, int *vid)
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{
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/* check if support the output_mode by television,
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* return 0 is not support */
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if (1 != hal_is_support_mode(channel, DISP_OUTPUT_TYPE_HDMI, mode)) {
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int i = 0;
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/* self-define hdmi mode list */
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const int HDMI_MODES[] = {
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DISP_TV_MOD_3840_2160P_30HZ,
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DISP_TV_MOD_1080P_60HZ,
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DISP_TV_MOD_1080I_60HZ,
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DISP_TV_MOD_1080P_50HZ,
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DISP_TV_MOD_1080I_50HZ,
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DISP_TV_MOD_720P_60HZ,
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DISP_TV_MOD_720P_50HZ,
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DISP_TV_MOD_576P,
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DISP_TV_MOD_480P,
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};
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for (i = 0; i < sizeof(HDMI_MODES) / sizeof(HDMI_MODES[0]);
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i++) {
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if (1 == hal_is_support_mode(channel,
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DISP_OUTPUT_TYPE_HDMI,
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HDMI_MODES[i])) {
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printf("find mode[%d] in HDMI_MODES\n",
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HDMI_MODES[i]);
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mode = HDMI_MODES[i];
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break;
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}
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}
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}
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hal_save_int_to_kernel("tv_vdid", *vid);
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return mode;
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}
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