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/*
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* Copyright (C) 2011,2015 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#include <debug.h>
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#include <drivers/display.h>
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#include <drivers/displayport/displayport.h>
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#include <drivers/displayport.h>
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#include <drivers/power.h>
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#include <platform/gpio.h>
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#include <platform/gpiodef.h>
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#include <lib/env.h>
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#include <sys/task.h>
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#include "edp.h"
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#define kHPDTimeout (186 * 1000)
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/*
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* Panel ID is based on "DP Panel Vendor ID spec, v1.5"
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*/
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static u_int32_t edp_panel_id;
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static u_int32_t edp_dot_pitch;
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static u_int32_t edp_default_color;
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static u_int32_t edp_voltage_offset;
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static u_int32_t edp_backlight_cal;
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static u_int8_t edp_raw_panel_id[kEDPRawPanelIdLength];
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static dp_t edp_display_config;
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int edp_quiesce(void);
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static void edp_panel_enable(bool enable);
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int edp_init(struct display_timing *timing, enum colorspace color, u_int32_t *display_id)
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{
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int result;
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utime_t HPDTime = 0;
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dprintf(DEBUG_CRITICAL, "edp_init()\n");
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// Save the display's dot pitch
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edp_dot_pitch = timing->dot_pitch;
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memcpy(&edp_display_config, timing->display_config, sizeof(dp_t));
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// Kick off eDP controller
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if ((result = displayport_init_with_timing_info(timing)) != 0)
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goto error;
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// Power-up the display
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edp_panel_enable(true);
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//Wait for HPD to allow enough time for TCON to to be ready
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if (dp_controller_wait_for_edp_hpd(&HPDTime) == false) {
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dprintf(DEBUG_CRITICAL, "timeout waiting for HPD\n");
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goto error;
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}
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if (edp_panel_id == 0) {
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edp_panel_id = env_get_uint("pinot-panel-id", 0);
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}
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if (edp_panel_id == 0) {
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// read the panel ID
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result = displayport_get_raw_panel_id(edp_raw_panel_id);
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if (result != 0) {
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dprintf(DEBUG_CRITICAL, "edp_init(): read of edp panel id failed\n");
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} else {
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edp_panel_id = edp_raw_panel_id[0] << 24; // Build ID
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edp_panel_id |= edp_raw_panel_id[1] << 16; // Panel Vendor ID
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edp_panel_id |= edp_raw_panel_id[2] << 8; // Program ID
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edp_panel_id |= edp_raw_panel_id[3] << 0; // Silicon Vendor/Model ID
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edp_default_color = (edp_raw_panel_id[0] & 1) ? 0x00000000 : 0x00FFFFFF;
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edp_voltage_offset = edp_raw_panel_id[4];
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edp_backlight_cal = edp_raw_panel_id[5];
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}
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}
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dprintf(DEBUG_CRITICAL, "edp_init(): edp_panel_id: 0x%08x\n", edp_panel_id);
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dprintf(DEBUG_CRITICAL, "edp_init(): edp_default_color: 0x%08x\n", edp_default_color);
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dprintf(DEBUG_CRITICAL, "edp_init(): edp_backlight_cal: 0x%08x\n", edp_backlight_cal);
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// Ignore the real default color and use black
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edp_default_color = 0x00000000;
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if (edp_panel_id == 0) {
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dprintf(DEBUG_CRITICAL, "panel_id = 0\n");
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goto error;
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}
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// the HPD signal causes the rest of the DP initialization to occur on the dp_controller_task
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// we hold the rest of the enable to prevent racing this task and hence violating the panel's timing requirement
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utime_t timeout = HPDTime + kHPDTimeout;
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dp_device_wait_started(timeout);
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// Enable the CLCD
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display_set_enable(true, &edp_default_color);
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*display_id = edp_panel_id;
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// Adjust display voltage offset
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#if WITH_HW_POWER_DIALOG
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if (edp_voltage_offset != 0) {
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bool fixed_boost = env_get_bool("fixed-lcm-boost", false);
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power_set_display_voltage_offset(edp_voltage_offset, fixed_boost);
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}
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#endif
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//Allow enough time before enabling backlight. Per spec at least 134ms (T4 + T5 + T6 + T7) after seeing HPD.
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dp_controller_wait_for_HPD_to_BL(HPDTime);
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return 0;
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error:
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edp_quiesce();
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return -1;
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}
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int edp_quiesce(void)
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{
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dprintf(DEBUG_CRITICAL, "edp_quiesce()\n");
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displayport_quiesce();
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edp_panel_enable(false);
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return 0;
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}
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static void edp_panel_enable(bool enable)
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{
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#if PMU_LCD_PWR_EN
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power_set_gpio(GPIO_PMU_LCD_PWR_EN, 1, enable);
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#else
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gpio_write(GPIO_LCD_PWR_EN, enable);
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#endif
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}
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#if WITH_DEVICETREE
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#include <lib/devicetree.h>
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int edp_update_device_tree(DTNode *edp_node, DTNode *lcd_node, DTNode *clcd_node, DTNode *backlight_node)
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{
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u_int32_t propSize;
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char *propName;
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void *propData;
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if (edp_panel_id == 0) return -1;
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propName = "lcd-panel-id";
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if (FindProperty(edp_node, &propName, &propData, &propSize)) {
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((u_int32_t *)propData)[0] = edp_panel_id;
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}
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propName = "raw-panel-id";
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if (FindProperty(edp_node, &propName, &propData, &propSize)) {
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if (propSize > sizeof(edp_raw_panel_id)) propSize = sizeof(edp_raw_panel_id);
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memcpy(propData, edp_raw_panel_id, propSize);
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}
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propName = "pre_configured";
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if (FindProperty(edp_node, &propName, &propData, &propSize)) {
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if (propSize >= sizeof(u_int8_t))
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((u_int32_t *)propData)[0] = displayport_video_configured() ? 1 : 0;
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}
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if (lcd_node != NULL) {
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propName = "alpm-enable";
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if (FindProperty(lcd_node, &propName, &propData, &propSize)) {
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if (propSize == sizeof(uint32_t)) {
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uint32_t data = dp_device_is_alpm_enabled();
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((uint32_t*)propData)[0] = data;
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}
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}
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propName = "lcd-panel-id";
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if (FindProperty(lcd_node, &propName, &propData, &propSize)) {
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((u_int32_t *)propData)[0] = edp_panel_id;
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}
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propName = "raw-panel-id";
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if (FindProperty(lcd_node, &propName, &propData, &propSize)) {
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if (propSize > sizeof(edp_raw_panel_id)) propSize = sizeof(edp_raw_panel_id);
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memcpy(propData, edp_raw_panel_id, propSize);
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}
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}
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if (clcd_node != NULL) {
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propName = "display-default-color";
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if (FindProperty(clcd_node, &propName, &propData, &propSize)) {
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((u_int32_t *)propData)[0] = edp_default_color;
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}
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propName = "dot-pitch";
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if (FindProperty(clcd_node, &propName, &propData, &propSize)) {
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((u_int32_t *)propData)[0] = edp_dot_pitch;
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}
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propName = "vrr-version";
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if (FindProperty(clcd_node, &propName, &propData, &propSize)) {
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if (propSize == sizeof(uint32_t)) {
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uint32_t data = edp_display_config.vrr_on << 31 | edp_display_config.vrr_enable;
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((uint32_t*)propData)[0] = data;
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}
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}
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}
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if (backlight_node != NULL) {
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propName = "display-backlight-calibration";
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if (FindProperty(backlight_node, &propName, &propData, &propSize)) {
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((u_int32_t *)propData)[0] = edp_backlight_cal;
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}
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propName = "backlight-id";
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if (FindProperty(backlight_node, &propName, &propData, &propSize)) {
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if (((u_int32_t *)propData)[0] == 0xffffffff) {
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// We are moving DP panel program-id by 1000 to not collide with
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// MIPI panel program ids
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((u_int32_t *)propData)[0] = ((edp_panel_id >> 8) & 0xff) + 1000;
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}
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}
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}
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return 0;
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}
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#endif
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@@ -0,0 +1,14 @@
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/*
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* Copyright (C) 2011 Apple Inc. All rights reserved.
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*
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* This document is the property of Apple Inc.
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* It is considered confidential and proprietary.
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*
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* This document may not be reproduced or transmitted in any form,
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* in whole or in part, without the express written permission of
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* Apple Inc.
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*/
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#ifndef __DRIVERS_EDP_H
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#define __DRIVERS_EDP_H
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#endif /* ! __DRIVERS_EDP_H */
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@@ -0,0 +1,16 @@
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# Copyright (C) 2011 Apple Inc. All rights reserved.
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#
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# This document is the property of Apple Inc.
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# It is considered confidential and proprietary.
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#
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# This document may not be reproduced or transmitted in any form,
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# in whole or in part, without the express written permission of
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# Apple Inc.
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#
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LOCAL_DIR := $(GET_LOCAL_DIR)
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OPTIONS += \
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WITH_HW_DISPLAY_EDP=1
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ALL_OBJS += \
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$(LOCAL_DIR)/edp.o
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