Hi, Pavel
Can I get your Acked-by: for this patch?
Thanks!
Wu Zhangjin
On Fri, 2009-12-04 at 21:36 +0800, Wu Zhangjin wrote:
> From: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
>
> This patch adds Video Output Driver, it provides standard
> interface(/sys/class/video_output) to turn on/off the video output of
> LCD, CRT.
>
> Signed-off-by: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
> ---
> drivers/platform/mips/Kconfig | 1 +
> drivers/platform/mips/yeeloong_laptop.c | 147 +++++++++++++++++++++++++++++++
> 2 files changed, 148 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/platform/mips/Kconfig b/drivers/platform/mips/Kconfig
> index 9c8385c..4a89c01 100644
> --- a/drivers/platform/mips/Kconfig
> +++ b/drivers/platform/mips/Kconfig
> @@ -21,6 +21,7 @@ config LEMOTE_YEELOONG2F
> select SYS_SUPPORTS_APM_EMULATION
> select APM_EMULATION
> select HWMON
> + select VIDEO_OUTPUT_CONTROL
> default m
> help
> YeeLoong netbook is a mini laptop made by Lemote, which is basically
> diff --git a/drivers/platform/mips/yeeloong_laptop.c b/drivers/platform/mips/yeeloong_laptop.c
> index 644aaa7..8378926 100644
> --- a/drivers/platform/mips/yeeloong_laptop.c
> +++ b/drivers/platform/mips/yeeloong_laptop.c
> @@ -16,6 +16,7 @@
> #include <linux/apm-emulation.h>/* for battery subdriver */
> #include <linux/hwmon.h> /* for hwmon subdriver */
> #include <linux/hwmon-sysfs.h>
> +#include <linux/video_output.h> /* for video output subdriver */
>
> #include <ec_kb3310b.h>
>
> @@ -397,6 +398,144 @@ static void yeeloong_hwmon_exit(void)
> }
> }
>
> +/* video output subdriver */
> +
> +static int lcd_video_output_get(struct output_device *od)
> +{
> + return ec_read(REG_DISPLAY_LCD);
> +}
> +
> +static int lcd_video_output_set(struct output_device *od)
> +{
> + int value;
> + unsigned long status;
> +
> + status = !!od->request_state;
> +
> + if (status == BIT_DISPLAY_LCD_ON) {
> + /* Turn on LCD */
> + outb(0x31, 0x3c4);
> + value = inb(0x3c5);
> + value = (value & 0xf8) | 0x03;
> + outb(0x31, 0x3c4);
> + outb(value, 0x3c5);
> + /* Turn on backlight */
> + ec_write(REG_BACKLIGHT_CTRL, BIT_BACKLIGHT_ON);
> + } else {
> + /* Turn off backlight */
> + ec_write(REG_BACKLIGHT_CTRL, BIT_BACKLIGHT_OFF);
> + /* Turn off LCD */
> + outb(0x31, 0x3c4);
> + value = inb(0x3c5);
> + value = (value & 0xf8) | 0x02;
> + outb(0x31, 0x3c4);
> + outb(value, 0x3c5);
> + }
> +
> + return 0;
> +}
> +
> +static struct output_properties lcd_output_properties = {
> + .set_state = lcd_video_output_set,
> + .get_status = lcd_video_output_get,
> +};
> +
> +static int crt_video_output_get(struct output_device *od)
> +{
> + return ec_read(REG_CRT_DETECT);
> +}
> +
> +static int crt_video_output_set(struct output_device *od)
> +{
> + int value;
> + unsigned long status;
> +
> + status = !!od->request_state;
> +
> + if (status == BIT_CRT_DETECT_PLUG) {
> + if (ec_read(REG_CRT_DETECT) == BIT_CRT_DETECT_PLUG) {
> + /* Turn on CRT */
> + outb(0x21, 0x3c4);
> + value = inb(0x3c5);
> + value &= ~(1 << 7);
> + outb(0x21, 0x3c4);
> + outb(value, 0x3c5);
> + }
> + } else {
> + /* Turn off CRT */
> + outb(0x21, 0x3c4);
> + value = inb(0x3c5);
> + value |= (1 << 7);
> + outb(0x21, 0x3c4);
> + outb(value, 0x3c5);
> + }
> +
> + return 0;
> +}
> +
> +static struct output_properties crt_output_properties = {
> + .set_state = crt_video_output_set,
> + .get_status = crt_video_output_get,
> +};
> +
> +static struct output_device *lcd_output_dev, *crt_output_dev;
> +
> +static void yeeloong_lcd_vo_set(int status)
> +{
> + lcd_output_dev->request_state = status;
> + lcd_video_output_set(lcd_output_dev);
> +}
> +
> +static void yeeloong_crt_vo_set(int status)
> +{
> + crt_output_dev->request_state = status;
> + crt_video_output_set(crt_output_dev);
> +}
> +
> +static int yeeloong_vo_init(void)
> +{
> + int ret;
> +
> + /* Register video output device: lcd, crt */
> + lcd_output_dev = video_output_register("LCD", NULL, NULL,
> + &lcd_output_properties);
> +
> + if (IS_ERR(lcd_output_dev)) {
> + ret = PTR_ERR(lcd_output_dev);
> + lcd_output_dev = NULL;
> + return ret;
> + }
> + /* Ensure LCD is on by default */
> + yeeloong_lcd_vo_set(BIT_DISPLAY_LCD_ON);
> +
> + crt_output_dev = video_output_register("CRT", NULL, NULL,
> + &crt_output_properties);
> +
> + if (IS_ERR(crt_output_dev)) {
> + ret = PTR_ERR(crt_output_dev);
> + crt_output_dev = NULL;
> + return ret;
> + }
> +
> + /* Turn off CRT by default, and will be enabled when the CRT
> + * connectting event reported by SCI */
> + yeeloong_crt_vo_set(BIT_CRT_DETECT_UNPLUG);
> +
> + return 0;
> +}
> +
> +static void yeeloong_vo_exit(void)
> +{
> + if (lcd_output_dev) {
> + video_output_unregister(lcd_output_dev);
> + lcd_output_dev = NULL;
> + }
> + if (crt_output_dev) {
> + video_output_unregister(crt_output_dev);
> + crt_output_dev = NULL;
> + }
> +}
> +
> static struct platform_device_id platform_device_ids[] = {
> {
> .name = "yeeloong_laptop",
> @@ -443,11 +582,19 @@ static int __init yeeloong_init(void)
> return ret;
> }
>
> + ret = yeeloong_vo_init();
> + if (ret) {
> + pr_err("Fail to register yeeloong video output driver.\n");
> + yeeloong_vo_exit();
> + return ret;
> + }
> +
> return 0;
> }
>
> static void __exit yeeloong_exit(void)
> {
> + yeeloong_vo_exit();
> yeeloong_hwmon_exit();
> yeeloong_battery_exit();
> yeeloong_backlight_exit();
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