diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/s3c-fb.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/video/s3c-fb.c b/drivers/video/s3c-fb.c index 8ea974dd92c..f9aca9d13d1 100644 --- a/drivers/video/s3c-fb.c +++ b/drivers/video/s3c-fb.c @@ -1027,6 +1027,28 @@ static struct fb_ops s3c_fb_ops = { }; /** + * s3c_fb_missing_pixclock() - calculates pixel clock + * @mode: The video mode to change. + * + * Calculate the pixel clock when none has been given through platform data. + */ +static void __devinit s3c_fb_missing_pixclock(struct fb_videomode *mode) +{ + u64 pixclk = 1000000000000ULL; + u32 div; + + div = mode->left_margin + mode->hsync_len + mode->right_margin + + mode->xres; + div *= mode->upper_margin + mode->vsync_len + mode->lower_margin + + mode->yres; + div *= mode->refresh ? : 60; + + do_div(pixclk, div); + + mode->pixclock = pixclk; +} + +/** * s3c_fb_alloc_memory() - allocate display memory for framebuffer window * @sfb: The base resources for the hardware. * @win: The window to initialise memory for. @@ -1364,6 +1386,9 @@ static int __devinit s3c_fb_probe(struct platform_device *pdev) if (!pd->win[win]) continue; + if (!pd->win[win]->win_mode.pixclock) + s3c_fb_missing_pixclock(&pd->win[win]->win_mode); + ret = s3c_fb_probe_win(sfb, win, fbdrv->win[win], &sfb->windows[win]); if (ret < 0) { |