diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/s3c-fb.c | 111 |
1 files changed, 107 insertions, 4 deletions
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c index f9aca9d13d1b..83ce9a04d872 100644 --- a/drivers/video/s3c-fb.c +++ b/drivers/video/s3c-fb.c @@ -23,6 +23,7 @@ #include <linux/io.h> #include <linux/uaccess.h> #include <linux/interrupt.h> +#include <linux/pm_runtime.h> #include <mach/map.h> #include <plat/regs-fb-v4.h> @@ -1013,8 +1014,30 @@ static int s3c_fb_ioctl(struct fb_info *info, unsigned int cmd, return ret; } +static int s3c_fb_open(struct fb_info *info, int user) +{ + struct s3c_fb_win *win = info->par; + struct s3c_fb *sfb = win->parent; + + pm_runtime_get_sync(sfb->dev); + + return 0; +} + +static int s3c_fb_release(struct fb_info *info, int user) +{ + struct s3c_fb_win *win = info->par; + struct s3c_fb *sfb = win->parent; + + pm_runtime_put_sync(sfb->dev); + + return 0; +} + static struct fb_ops s3c_fb_ops = { .owner = THIS_MODULE, + .fb_open = s3c_fb_open, + .fb_release = s3c_fb_release, .fb_check_var = s3c_fb_check_var, .fb_set_par = s3c_fb_set_par, .fb_blank = s3c_fb_blank, @@ -1322,6 +1345,8 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) clk_enable(sfb->bus_clk); + pm_runtime_enable(sfb->dev); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(dev, "failed to find registers\n"); @@ -1360,6 +1385,9 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) dev_dbg(dev, "got resources (regs %p), probing windows\n", sfb->regs); + platform_set_drvdata(pdev, sfb); + pm_runtime_get_sync(sfb->dev); + /* setup gpio and output polarity controls */ pd->setup_gpio(); @@ -1400,6 +1428,7 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, sfb); + pm_runtime_put_sync(sfb->dev); return 0; @@ -1434,6 +1463,8 @@ static int __devexit s3c_fb_remove(struct platform_device *pdev) struct s3c_fb *sfb = platform_get_drvdata(pdev); int win; + pm_runtime_get_sync(sfb->dev); + for (win = 0; win < S3C_FB_MAX_WIN; win++) if (sfb->windows[win]) s3c_fb_release_win(sfb, sfb->windows[win]); @@ -1450,12 +1481,74 @@ static int __devexit s3c_fb_remove(struct platform_device *pdev) kfree(sfb); + pm_runtime_put_sync(sfb->dev); + pm_runtime_disable(sfb->dev); + return 0; } #ifdef CONFIG_PM -static int s3c_fb_suspend(struct platform_device *pdev, pm_message_t state) +static int s3c_fb_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct s3c_fb *sfb = platform_get_drvdata(pdev); + struct s3c_fb_win *win; + int win_no; + + for (win_no = S3C_FB_MAX_WIN - 1; win_no >= 0; win_no--) { + win = sfb->windows[win_no]; + if (!win) + continue; + + /* use the blank function to push into power-down */ + s3c_fb_blank(FB_BLANK_POWERDOWN, win->fbinfo); + } + + clk_disable(sfb->bus_clk); + return 0; +} + +static int s3c_fb_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct s3c_fb *sfb = platform_get_drvdata(pdev); + struct s3c_fb_platdata *pd = sfb->pdata; + struct s3c_fb_win *win; + int win_no; + + clk_enable(sfb->bus_clk); + + /* setup registers */ + writel(pd->vidcon1, sfb->regs + VIDCON1); + + /* zero all windows before we do anything */ + for (win_no = 0; win_no < sfb->variant.nr_windows; win_no++) + s3c_fb_clear_win(sfb, win_no); + + for (win_no = 0; win_no < sfb->variant.nr_windows - 1; win_no++) { + void __iomem *regs = sfb->regs + sfb->variant.keycon; + + regs += (win_no * 8); + writel(0xffffff, regs + WKEYCON0); + writel(0xffffff, regs + WKEYCON1); + } + + /* restore framebuffers */ + for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) { + win = sfb->windows[win_no]; + if (!win) + continue; + + dev_dbg(&pdev->dev, "resuming window %d\n", win_no); + s3c_fb_set_par(win->fbinfo); + } + + return 0; +} + +int s3c_fb_runtime_suspend(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); struct s3c_fb *sfb = platform_get_drvdata(pdev); struct s3c_fb_win *win; int win_no; @@ -1473,8 +1566,9 @@ static int s3c_fb_suspend(struct platform_device *pdev, pm_message_t state) return 0; } -static int s3c_fb_resume(struct platform_device *pdev) +int s3c_fb_runtime_resume(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); struct s3c_fb *sfb = platform_get_drvdata(pdev); struct s3c_fb_platdata *pd = sfb->pdata; struct s3c_fb_win *win; @@ -1509,9 +1603,12 @@ static int s3c_fb_resume(struct platform_device *pdev) return 0; } + #else #define s3c_fb_suspend NULL #define s3c_fb_resume NULL +#define s3c_fb_runtime_suspend NULL +#define s3c_fb_runtime_resume NULL #endif @@ -1710,15 +1807,21 @@ static struct platform_device_id s3c_fb_driver_ids[] = { }; MODULE_DEVICE_TABLE(platform, s3c_fb_driver_ids); +static const struct dev_pm_ops s3cfb_pm_ops = { + .suspend = s3c_fb_suspend, + .resume = s3c_fb_resume, + .runtime_suspend = s3c_fb_runtime_suspend, + .runtime_resume = s3c_fb_runtime_resume, +}; + static struct platform_driver s3c_fb_driver = { .probe = s3c_fb_probe, .remove = __devexit_p(s3c_fb_remove), - .suspend = s3c_fb_suspend, - .resume = s3c_fb_resume, .id_table = s3c_fb_driver_ids, .driver = { .name = "s3c-fb", .owner = THIS_MODULE, + .pm = &s3cfb_pm_ops, }, }; |