mirror of
https://github.com/followmsi/android_kernel_google_msm.git
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0ffbb83d74
Modify LVDS Chimei panel pixel clock from 75 MHz to 79.4 MHz and update PLL settings to achieve refresh rate of 60 Hz for better user experience. CRs-Fixed: 375510 Change-Id: Ifb4036c790552b1c43d5a3c817ed05691f86c7f6 Signed-off-by: Ravishangar Kalyanam <rkalya@codeaurora.org>
167 lines
3.9 KiB
C
167 lines
3.9 KiB
C
/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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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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#include "msm_fb.h"
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#include <linux/pwm.h>
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#include <linux/mfd/pm8xxx/pm8921.h>
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#define LVDS_CHIMEI_PWM_FREQ_HZ 300
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#define LVDS_CHIMEI_PWM_PERIOD_USEC (USEC_PER_SEC / LVDS_CHIMEI_PWM_FREQ_HZ)
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#define LVDS_CHIMEI_PWM_LEVEL 255
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#define LVDS_CHIMEI_PWM_DUTY_LEVEL \
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(LVDS_CHIMEI_PWM_PERIOD_USEC / LVDS_CHIMEI_PWM_LEVEL)
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static struct lvds_panel_platform_data *cm_pdata;
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static struct platform_device *cm_fbpdev;
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static struct pwm_device *bl_lpm;
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static int lvds_chimei_panel_on(struct platform_device *pdev)
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{
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return 0;
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}
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static int lvds_chimei_panel_off(struct platform_device *pdev)
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{
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return 0;
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}
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static void lvds_chimei_set_backlight(struct msm_fb_data_type *mfd)
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{
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int ret;
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pr_debug("%s: back light level %d\n", __func__, mfd->bl_level);
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if (bl_lpm) {
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ret = pwm_config(bl_lpm, LVDS_CHIMEI_PWM_DUTY_LEVEL *
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mfd->bl_level, LVDS_CHIMEI_PWM_PERIOD_USEC);
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if (ret) {
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pr_err("pwm_config on lpm failed %d\n", ret);
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return;
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}
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if (mfd->bl_level) {
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ret = pwm_enable(bl_lpm);
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if (ret)
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pr_err("pwm enable/disable on lpm failed"
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"for bl %d\n", mfd->bl_level);
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} else {
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pwm_disable(bl_lpm);
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}
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}
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}
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static int __devinit lvds_chimei_probe(struct platform_device *pdev)
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{
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int rc = 0;
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if (pdev->id == 0) {
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cm_pdata = pdev->dev.platform_data;
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if (cm_pdata == NULL)
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pr_err("%s: no PWM gpio specified\n", __func__);
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return 0;
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}
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if (cm_pdata != NULL)
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bl_lpm = pwm_request(cm_pdata->gpio[0],
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"backlight");
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if (bl_lpm == NULL || IS_ERR(bl_lpm)) {
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pr_err("%s pwm_request() failed\n", __func__);
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bl_lpm = NULL;
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}
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pr_debug("bl_lpm = %p lpm = %d\n", bl_lpm,
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cm_pdata->gpio[0]);
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cm_fbpdev = msm_fb_add_device(pdev);
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if (!cm_fbpdev) {
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dev_err(&pdev->dev, "failed to add msm_fb device\n");
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rc = -ENODEV;
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goto probe_exit;
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}
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probe_exit:
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return rc;
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}
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static struct platform_driver this_driver = {
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.probe = lvds_chimei_probe,
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.driver = {
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.name = "lvds_chimei_wxga",
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},
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};
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static struct msm_fb_panel_data lvds_chimei_panel_data = {
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.on = lvds_chimei_panel_on,
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.off = lvds_chimei_panel_off,
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.set_backlight = lvds_chimei_set_backlight,
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};
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static struct platform_device this_device = {
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.name = "lvds_chimei_wxga",
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.id = 1,
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.dev = {
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.platform_data = &lvds_chimei_panel_data,
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}
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};
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static int __init lvds_chimei_wxga_init(void)
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{
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int ret;
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struct msm_panel_info *pinfo;
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if (msm_fb_detect_client("lvds_chimei_wxga"))
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return 0;
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ret = platform_driver_register(&this_driver);
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if (ret)
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return ret;
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pinfo = &lvds_chimei_panel_data.panel_info;
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pinfo->xres = 1366;
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pinfo->yres = 768;
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MSM_FB_SINGLE_MODE_PANEL(pinfo);
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pinfo->type = LVDS_PANEL;
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pinfo->pdest = DISPLAY_1;
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pinfo->wait_cycle = 0;
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pinfo->bpp = 24;
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pinfo->fb_num = 2;
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pinfo->clk_rate = 79400000;
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pinfo->bl_max = 255;
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pinfo->bl_min = 1;
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/*
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* this panel is operated by de,
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* vsycn and hsync are ignored
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*/
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pinfo->lcdc.h_back_porch = 0;
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pinfo->lcdc.h_front_porch = 194;
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pinfo->lcdc.h_pulse_width = 40;
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pinfo->lcdc.v_back_porch = 0;
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pinfo->lcdc.v_front_porch = 38;
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pinfo->lcdc.v_pulse_width = 20;
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pinfo->lcdc.underflow_clr = 0xff;
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pinfo->lcdc.hsync_skew = 0;
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pinfo->lvds.channel_mode = LVDS_SINGLE_CHANNEL_MODE;
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/* Set border color, padding only for reducing active display region */
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pinfo->lcdc.border_clr = 0x0;
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pinfo->lcdc.xres_pad = 0;
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pinfo->lcdc.yres_pad = 0;
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ret = platform_device_register(&this_device);
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if (ret)
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platform_driver_unregister(&this_driver);
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return ret;
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}
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module_init(lvds_chimei_wxga_init);
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