diff options
Diffstat (limited to 'drivers/video/atmel_lcdfb.c')
| -rw-r--r-- | drivers/video/atmel_lcdfb.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c index f8e711147501..5d22ea532e42 100644 --- a/drivers/video/atmel_lcdfb.c +++ b/drivers/video/atmel_lcdfb.c @@ -203,6 +203,26 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var, var->transp.offset = var->transp.length = 0; var->xoffset = var->yoffset = 0; + /* Saturate vertical and horizontal timings at maximum values */ + var->vsync_len = min_t(u32, var->vsync_len, + (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1); + var->upper_margin = min_t(u32, var->upper_margin, + ATMEL_LCDC_VBP >> ATMEL_LCDC_VBP_OFFSET); + var->lower_margin = min_t(u32, var->lower_margin, + ATMEL_LCDC_VFP); + var->right_margin = min_t(u32, var->right_margin, + (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1); + var->hsync_len = min_t(u32, var->hsync_len, + (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1); + var->left_margin = min_t(u32, var->left_margin, + ATMEL_LCDC_HBP + 1); + + /* Some parameters can't be zero */ + var->vsync_len = max_t(u32, var->vsync_len, 1); + var->right_margin = max_t(u32, var->right_margin, 1); + var->hsync_len = max_t(u32, var->hsync_len, 1); + var->left_margin = max_t(u32, var->left_margin, 1); + switch (var->bits_per_pixel) { case 1: case 2: |