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msm: mdss: add backlight gpio invert support for display

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Some platforms may use external gpio to enable and disable backlight,
and we may need to invert this gpio according to HW design,
so add support for that.

CRs-Fixed: 1109294
Change-Id: Ib5e895eebcc38d185e8b703c3d895781b43c58c7
Signed-off-by: Yahui Wang <yahuiw@codeaurora.org>
This commit is contained in:
Yahui Wang 2016-12-12 22:43:20 +08:00
parent 79a1a55cf8
commit 92172af176
5 changed files with 29 additions and 7 deletions
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2
Documentation/devicetree/bindings/fb/mdss-dsi.txt
View file

@ -103,6 +103,7 @@ Optional properties:
- qcom,platform-reset-gpio: Specifies the panel reset gpio.
- qcom,platform-te-gpio: Specifies the gpio used for TE.
- qcom,platform-bklight-en-gpio: Specifies the gpio used to enable display back-light
- qcom,platform-bklight-en-gpio-invert: Invert the gpio used to enable display back-light
- qcom,panel-mode-gpio: Specifies the GPIO to select video/command/single-port/dual-port
mode of panel through gpio when it supports these modes.
- pinctrl-names: List of names to assign mdss pin states defined in pinctrl device node
@ -267,6 +268,7 @@ Example:
qcom,platform-te-gpio = <&msmgpio 24 0>;
qcom,platform-enable-gpio = <&msmgpio 58 1>;
qcom,platform-bklight-en-gpio = <&msmgpio 86 0>;
qcom,platform-bklight-en-gpio-invert;
qcom,panel-mode-gpio = <&msmgpio 107 0>;
qcom,dsi-irq-line;
qcom,lane-map = "lane_map_3012";

6
drivers/video/fbdev/msm/dsi_v2.c
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
/* Copyright (c) 2012-2015, 2017, 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
@ -232,6 +232,10 @@ static int dsi_parse_gpio(struct platform_device *pdev,
pr_err("%s:%d, bklt_en gpio not specified\n",
__func__, __LINE__);
ctrl_pdata->bklt_en_gpio_invert =
of_property_read_bool(ctrl_pdev->dev.of_node,
"qcom,platform-bklight-en-gpio-invert");
return 0;
}

6
drivers/video/fbdev/msm/mdss_dsi.c
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
/* Copyright (c) 2012-2017, 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
@ -4098,6 +4098,10 @@ static int mdss_dsi_parse_gpio_params(struct platform_device *ctrl_pdev,
if (!gpio_is_valid(ctrl_pdata->bklt_en_gpio))
pr_info("%s: bklt_en gpio not specified\n", __func__);
ctrl_pdata->bklt_en_gpio_invert =
of_property_read_bool(ctrl_pdev->dev.of_node,
"qcom,platform-bklight-en-gpio-invert");
ctrl_pdata->rst_gpio = of_get_named_gpio(ctrl_pdev->dev.of_node,
"qcom,platform-reset-gpio", 0);
if (!gpio_is_valid(ctrl_pdata->rst_gpio))

3
drivers/video/fbdev/msm/mdss_dsi.h
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
/* Copyright (c) 2012-2017, 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
@ -449,6 +449,7 @@ struct mdss_dsi_ctrl_pdata {
int rst_gpio;
int disp_en_gpio;
int bklt_en_gpio;
bool bklt_en_gpio_invert;
int lcd_mode_sel_gpio;
int bklt_ctrl; /* backlight ctrl */
bool pwm_pmi;

19
drivers/video/fbdev/msm/mdss_dsi_panel.c
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
/* Copyright (c) 2012-2017, 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
@ -343,8 +343,14 @@ int mdss_dsi_panel_reset(struct mdss_panel_data *pdata, int enable)
}
if (gpio_is_valid(ctrl_pdata->bklt_en_gpio)) {
rc = gpio_direction_output(
ctrl_pdata->bklt_en_gpio, 1);
if (ctrl_pdata->bklt_en_gpio_invert)
rc = gpio_direction_output(
ctrl_pdata->bklt_en_gpio, 0);
else
rc = gpio_direction_output(
ctrl_pdata->bklt_en_gpio, 1);
if (rc) {
pr_err("%s: unable to set dir for bklt gpio\n",
__func__);
@ -380,7 +386,12 @@ int mdss_dsi_panel_reset(struct mdss_panel_data *pdata, int enable)
}
} else {
if (gpio_is_valid(ctrl_pdata->bklt_en_gpio)) {
gpio_set_value((ctrl_pdata->bklt_en_gpio), 0);
if (ctrl_pdata->bklt_en_gpio_invert)
gpio_set_value((ctrl_pdata->bklt_en_gpio), 1);
else
gpio_set_value((ctrl_pdata->bklt_en_gpio), 0);
gpio_free(ctrl_pdata->bklt_en_gpio);
}
if (gpio_is_valid(ctrl_pdata->disp_en_gpio)) {