diff options
Diffstat (limited to 'drivers/video/s3c-fb.c')
| -rw-r--r-- | drivers/video/s3c-fb.c | 202 |
1 files changed, 90 insertions, 112 deletions
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c index 0753b1cfcb8..0c63b69b634 100644 --- a/drivers/video/s3c-fb.c +++ b/drivers/video/s3c-fb.c @@ -192,6 +192,7 @@ struct s3c_fb_vsync { * @regs: The mapped hardware registers. * @variant: Variant information for this hardware. * @enabled: A bitmask of enabled hardware windows. + * @output_on: Flag if the physical output is enabled. * @pdata: The platform configuration data passed with the device. * @windows: The hardware windows that have been claimed. * @irq_no: IRQ line number @@ -208,6 +209,7 @@ struct s3c_fb { struct s3c_fb_variant variant; unsigned char enabled; + bool output_on; struct s3c_fb_platdata *pdata; struct s3c_fb_win *windows[S3C_FB_MAX_WIN]; @@ -441,6 +443,39 @@ static void shadow_protect_win(struct s3c_fb_win *win, bool protect) } /** + * s3c_fb_enable() - Set the state of the main LCD output + * @sfb: The main framebuffer state. + * @enable: The state to set. + */ +static void s3c_fb_enable(struct s3c_fb *sfb, int enable) +{ + u32 vidcon0 = readl(sfb->regs + VIDCON0); + + if (enable && !sfb->output_on) + pm_runtime_get_sync(sfb->dev); + + if (enable) { + vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F; + } else { + /* see the note in the framebuffer datasheet about + * why you cannot take both of these bits down at the + * same time. */ + + if (vidcon0 & VIDCON0_ENVID) { + vidcon0 |= VIDCON0_ENVID; + vidcon0 &= ~VIDCON0_ENVID_F; + } + } + + writel(vidcon0, sfb->regs + VIDCON0); + + if (!enable && sfb->output_on) + pm_runtime_put_sync(sfb->dev); + + sfb->output_on = enable; +} + +/** * s3c_fb_set_par() - framebuffer request to set new framebuffer state. * @info: The framebuffer to change. * @@ -461,6 +496,8 @@ static int s3c_fb_set_par(struct fb_info *info) dev_dbg(sfb->dev, "setting framebuffer parameters\n"); + pm_runtime_get_sync(sfb->dev); + shadow_protect_win(win, 1); switch (var->bits_per_pixel) { @@ -510,9 +547,10 @@ static int s3c_fb_set_par(struct fb_info *info) if (sfb->variant.is_2443) data |= (1 << 5); - data |= VIDCON0_ENVID | VIDCON0_ENVID_F; writel(data, regs + VIDCON0); + s3c_fb_enable(sfb, 1); + data = VIDTCON0_VBPD(var->upper_margin - 1) | VIDTCON0_VFPD(var->lower_margin - 1) | VIDTCON0_VSPW(var->vsync_len - 1); @@ -574,6 +612,7 @@ static int s3c_fb_set_par(struct fb_info *info) } data = WINCONx_ENWIN; + sfb->enabled |= (1 << win->index); /* note, since we have to round up the bits-per-pixel, we end up * relying on the bitfield information for r/g/b/a to work out @@ -621,7 +660,8 @@ static int s3c_fb_set_par(struct fb_info *info) } else if (var->transp.length == 1) data |= WINCON1_BPPMODE_25BPP_A1888 | WINCON1_BLD_PIX; - else if (var->transp.length == 4) + else if ((var->transp.length == 4) || + (var->transp.length == 8)) data |= WINCON1_BPPMODE_28BPP_A4888 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; else @@ -654,6 +694,8 @@ static int s3c_fb_set_par(struct fb_info *info) shadow_protect_win(win, 0); + pm_runtime_put_sync(sfb->dev); + return 0; } @@ -725,6 +767,8 @@ static int s3c_fb_setcolreg(unsigned regno, dev_dbg(sfb->dev, "%s: win %d: %d => rgb=%d/%d/%d\n", __func__, win->index, regno, red, green, blue); + pm_runtime_get_sync(sfb->dev); + switch (info->fix.visual) { case FB_VISUAL_TRUECOLOR: /* true-colour, use pseudo-palette */ @@ -752,39 +796,15 @@ static int s3c_fb_setcolreg(unsigned regno, break; default: + pm_runtime_put_sync(sfb->dev); return 1; /* unknown type */ } + pm_runtime_put_sync(sfb->dev); return 0; } /** - * s3c_fb_enable() - Set the state of the main LCD output - * @sfb: The main framebuffer state. - * @enable: The state to set. - */ -static void s3c_fb_enable(struct s3c_fb *sfb, int enable) -{ - u32 vidcon0 = readl(sfb->regs + VIDCON0); - - if (enable) - vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F; - else { - /* see the note in the framebuffer datasheet about - * why you cannot take both of these bits down at the - * same time. */ - - if (!(vidcon0 & VIDCON0_ENVID)) - return; - - vidcon0 |= VIDCON0_ENVID; - vidcon0 &= ~VIDCON0_ENVID_F; - } - - writel(vidcon0, sfb->regs + VIDCON0); -} - -/** * s3c_fb_blank() - blank or unblank the given window * @blank_mode: The blank state from FB_BLANK_* * @info: The framebuffer to blank. @@ -800,6 +820,8 @@ static int s3c_fb_blank(int blank_mode, struct fb_info *info) dev_dbg(sfb->dev, "blank mode %d\n", blank_mode); + pm_runtime_get_sync(sfb->dev); + wincon = readl(sfb->regs + sfb->variant.wincon + (index * 4)); switch (blank_mode) { @@ -810,12 +832,16 @@ static int s3c_fb_blank(int blank_mode, struct fb_info *info) case FB_BLANK_NORMAL: /* disable the DMA and display 0x0 (black) */ + shadow_protect_win(win, 1); writel(WINxMAP_MAP | WINxMAP_MAP_COLOUR(0x0), sfb->regs + sfb->variant.winmap + (index * 4)); + shadow_protect_win(win, 0); break; case FB_BLANK_UNBLANK: + shadow_protect_win(win, 1); writel(0x0, sfb->regs + sfb->variant.winmap + (index * 4)); + shadow_protect_win(win, 0); wincon |= WINCONx_ENWIN; sfb->enabled |= (1 << index); break; @@ -823,10 +849,13 @@ static int s3c_fb_blank(int blank_mode, struct fb_info *info) case FB_BLANK_VSYNC_SUSPEND: case FB_BLANK_HSYNC_SUSPEND: default: + pm_runtime_put_sync(sfb->dev); return 1; } + shadow_protect_win(win, 1); writel(wincon, sfb->regs + sfb->variant.wincon + (index * 4)); + shadow_protect_win(win, 0); /* Check the enabled state to see if we need to be running the * main LCD interface, as if there are no active windows then @@ -845,8 +874,13 @@ static int s3c_fb_blank(int blank_mode, struct fb_info *info) /* we're stuck with this until we can do something about overriding * the power control using the blanking event for a single fb. */ - if (index == sfb->pdata->default_win) + if (index == sfb->pdata->default_win) { + shadow_protect_win(win, 1); s3c_fb_enable(sfb, blank_mode != FB_BLANK_POWERDOWN ? 1 : 0); + shadow_protect_win(win, 0); + } + + pm_runtime_put_sync(sfb->dev); return 0; } @@ -870,6 +904,8 @@ static int s3c_fb_pan_display(struct fb_var_screeninfo *var, void __iomem *buf = sfb->regs + win->index * 8; unsigned int start_boff, end_boff; + pm_runtime_get_sync(sfb->dev); + /* Offset in bytes to the start of the displayed area */ start_boff = var->yoffset * info->fix.line_length; /* X offset depends on the current bpp */ @@ -888,6 +924,7 @@ static int s3c_fb_pan_display(struct fb_var_screeninfo *var, break; default: dev_err(sfb->dev, "invalid bpp\n"); + pm_runtime_put_sync(sfb->dev); return -EINVAL; } } @@ -903,6 +940,7 @@ static int s3c_fb_pan_display(struct fb_var_screeninfo *var, shadow_protect_win(win, 0); + pm_runtime_put_sync(sfb->dev); return 0; } @@ -992,11 +1030,16 @@ static int s3c_fb_wait_for_vsync(struct s3c_fb *sfb, u32 crtc) if (crtc != 0) return -ENODEV; + pm_runtime_get_sync(sfb->dev); + count = sfb->vsync_info.count; s3c_fb_enable_irq(sfb); ret = wait_event_interruptible_timeout(sfb->vsync_info.wait, count != sfb->vsync_info.count, msecs_to_jiffies(VSYNC_TIMEOUT_MSEC)); + + pm_runtime_put_sync(sfb->dev); + if (ret == 0) return -ETIMEDOUT; @@ -1027,30 +1070,8 @@ 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, @@ -1452,7 +1473,7 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) dev_err(dev, "failed to create window %d\n", win); for (; win >= 0; win--) s3c_fb_release_win(sfb, sfb->windows[win]); - goto err_irq; + goto err_pm_runtime; } } @@ -1461,7 +1482,8 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) return 0; -err_irq: +err_pm_runtime: + pm_runtime_put_sync(sfb->dev); free_irq(sfb->irq_no, sfb); err_ioremap: @@ -1471,6 +1493,8 @@ err_req_region: release_mem_region(sfb->regs_res->start, resource_size(sfb->regs_res)); err_lcd_clk: + pm_runtime_disable(sfb->dev); + if (!sfb->variant.has_clksel) { clk_disable(sfb->lcd_clk); clk_put(sfb->lcd_clk); @@ -1524,7 +1548,7 @@ static int __devexit s3c_fb_remove(struct platform_device *pdev) return 0; } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int s3c_fb_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -1571,10 +1595,15 @@ static int s3c_fb_resume(struct device *dev) for (win_no = 0; win_no < sfb->variant.nr_windows - 1; win_no++) { void __iomem *regs = sfb->regs + sfb->variant.keycon; + win = sfb->windows[win_no]; + if (!win) + continue; + shadow_protect_win(win, 1); regs += (win_no * 8); writel(0xffffff, regs + WKEYCON0); writel(0xffffff, regs + WKEYCON1); + shadow_protect_win(win, 0); } /* restore framebuffers */ @@ -1589,27 +1618,19 @@ static int s3c_fb_resume(struct device *dev) return 0; } +#endif +#ifdef CONFIG_PM_RUNTIME static 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; - - 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); - } if (!sfb->variant.has_clksel) clk_disable(sfb->lcd_clk); clk_disable(sfb->bus_clk); + return 0; } @@ -1618,8 +1639,6 @@ static 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; - int win_no; clk_enable(sfb->bus_clk); @@ -1630,39 +1649,10 @@ static int s3c_fb_runtime_resume(struct device *dev) pd->setup_gpio(); 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; } - -#else -#define s3c_fb_suspend NULL -#define s3c_fb_resume NULL -#define s3c_fb_runtime_suspend NULL -#define s3c_fb_runtime_resume NULL #endif - #define VALID_BPP124 (VALID_BPP(1) | VALID_BPP(2) | VALID_BPP(4)) #define VALID_BPP1248 (VALID_BPP124 | VALID_BPP(8)) @@ -1985,10 +1975,9 @@ 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, + SET_SYSTEM_SLEEP_PM_OPS(s3c_fb_suspend, s3c_fb_resume) + SET_RUNTIME_PM_OPS(s3c_fb_runtime_suspend, s3c_fb_runtime_resume, + NULL) }; static struct platform_driver s3c_fb_driver = { @@ -2002,18 +1991,7 @@ static struct platform_driver s3c_fb_driver = { }, }; -static int __init s3c_fb_init(void) -{ - return platform_driver_register(&s3c_fb_driver); -} - -static void __exit s3c_fb_cleanup(void) -{ - platform_driver_unregister(&s3c_fb_driver); -} - -module_init(s3c_fb_init); -module_exit(s3c_fb_cleanup); +module_platform_driver(s3c_fb_driver); MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); MODULE_DESCRIPTION("Samsung S3C SoC Framebuffer driver"); |