viafb: support color depth 15 and 30
Add support for the color depth 15 on IGA1 and 30 on IGA1 and IGA2. To allow the usage of those the driver now refuses color depth that are totally off and otherwise the selection in viafb_check_var is used. Therefore the first call to this for the first framebuffer was delayed a bit. It only enables the new formats if they are requested exactly (viafb_bpp=15|30). As this is a new feature, no regressions are expected. The color depth 15 was successfully tested. Didn't get anything usable for 30 but that might be the programs fault. I would like to get some feedback whether it works as expected or not if somebody knows a program/configuration where it should. Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Joseph Chan <JosephChan@via.com.tw> Cc: Scott Fang <ScottFang@viatech.com.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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415559fbf2
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e17cea3cec
2 changed files with 34 additions and 18 deletions
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@ -694,12 +694,18 @@ void viafb_set_primary_color_depth(u8 depth)
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case 8:
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case 8:
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value = 0x00;
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value = 0x00;
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break;
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break;
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case 15:
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value = 0x04;
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break;
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case 16:
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case 16:
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value = 0x14;
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value = 0x14;
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break;
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break;
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case 24:
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case 24:
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value = 0x0C;
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value = 0x0C;
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break;
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break;
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case 30:
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value = 0x08;
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break;
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default:
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default:
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printk(KERN_WARNING "viafb_set_primary_color_depth: "
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printk(KERN_WARNING "viafb_set_primary_color_depth: "
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"Unsupported depth: %d\n", depth);
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"Unsupported depth: %d\n", depth);
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@ -724,6 +730,9 @@ void viafb_set_secondary_color_depth(u8 depth)
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case 24:
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case 24:
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value = 0xC0;
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value = 0xC0;
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break;
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break;
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case 30:
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value = 0x80;
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break;
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default:
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default:
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printk(KERN_WARNING "viafb_set_secondary_color_depth: "
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printk(KERN_WARNING "viafb_set_secondary_color_depth: "
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"Unsupported depth: %d\n", depth);
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"Unsupported depth: %d\n", depth);
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@ -80,6 +80,15 @@ static void viafb_fill_var_color_info(struct fb_var_screeninfo *var, u8 depth)
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var->green.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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var->blue.length = 8;
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break;
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break;
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case 15:
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var->bits_per_pixel = 16;
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var->red.offset = 10;
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var->green.offset = 5;
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var->blue.offset = 0;
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var->red.length = 5;
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var->green.length = 5;
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var->blue.length = 5;
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break;
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case 16:
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case 16:
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var->bits_per_pixel = 16;
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var->bits_per_pixel = 16;
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var->red.offset = 11;
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var->red.offset = 11;
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@ -98,6 +107,15 @@ static void viafb_fill_var_color_info(struct fb_var_screeninfo *var, u8 depth)
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var->green.length = 8;
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var->green.length = 8;
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var->blue.length = 8;
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var->blue.length = 8;
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break;
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break;
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case 30:
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var->bits_per_pixel = 32;
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var->red.offset = 20;
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var->green.offset = 10;
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var->blue.offset = 0;
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var->red.length = 10;
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var->green.length = 10;
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var->blue.length = 10;
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break;
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}
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}
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}
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}
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@ -171,6 +189,10 @@ static int viafb_check_var(struct fb_var_screeninfo *var,
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return -EINVAL;
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return -EINVAL;
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else if (!depth)
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else if (!depth)
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depth = 24;
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depth = 24;
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else if (depth == 15 && viafb_dual_fb && ppar->iga_path == IGA1)
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depth = 15;
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else if (depth == 30)
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depth = 30;
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else if (depth <= 8)
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else if (depth <= 8)
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depth = 8;
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depth = 8;
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else if (depth <= 16)
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else if (depth <= 16)
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@ -1811,19 +1833,6 @@ static int __devinit via_pci_probe(struct pci_dev *pdev,
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viafb_second_virtual_yres = viafb_second_yres;
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viafb_second_virtual_yres = viafb_second_yres;
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}
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}
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switch (viafb_bpp) {
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case 0 ... 8:
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viafb_bpp = 8;
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break;
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case 9 ... 16:
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viafb_bpp = 16;
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break;
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case 17 ... 32:
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viafb_bpp = 32;
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break;
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default:
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viafb_bpp = 8;
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}
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default_var.xres = default_xres;
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default_var.xres = default_xres;
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default_var.yres = default_yres;
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default_var.yres = default_yres;
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switch (default_xres) {
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switch (default_xres) {
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@ -1836,8 +1845,6 @@ static int __devinit via_pci_probe(struct pci_dev *pdev,
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}
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}
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default_var.yres_virtual = default_yres;
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default_var.yres_virtual = default_yres;
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default_var.bits_per_pixel = viafb_bpp;
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default_var.bits_per_pixel = viafb_bpp;
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if (default_var.bits_per_pixel == 15)
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default_var.bits_per_pixel = 16;
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default_var.pixclock =
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default_var.pixclock =
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viafb_get_pixclock(default_xres, default_yres, viafb_refresh);
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viafb_get_pixclock(default_xres, default_yres, viafb_refresh);
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default_var.left_margin = (default_xres >> 3) & 0xf8;
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default_var.left_margin = (default_xres >> 3) & 0xf8;
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@ -1847,7 +1854,6 @@ static int __devinit via_pci_probe(struct pci_dev *pdev,
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default_var.hsync_len = default_var.left_margin;
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default_var.hsync_len = default_var.left_margin;
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default_var.vsync_len = 4;
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default_var.vsync_len = 4;
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viafb_setup_fixinfo(&viafbinfo->fix, viaparinfo);
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viafb_setup_fixinfo(&viafbinfo->fix, viaparinfo);
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viafb_check_var(&default_var, viafbinfo);
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viafbinfo->var = default_var;
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viafbinfo->var = default_var;
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if (viafb_dual_fb) {
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if (viafb_dual_fb) {
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@ -1883,8 +1889,6 @@ static int __devinit via_pci_probe(struct pci_dev *pdev,
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default_var.yres = viafb_second_yres;
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default_var.yres = viafb_second_yres;
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default_var.xres_virtual = viafb_second_virtual_xres;
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default_var.xres_virtual = viafb_second_virtual_xres;
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default_var.yres_virtual = viafb_second_virtual_yres;
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default_var.yres_virtual = viafb_second_virtual_yres;
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if (viafb_bpp1 != viafb_bpp)
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viafb_bpp1 = viafb_bpp;
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default_var.bits_per_pixel = viafb_bpp1;
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default_var.bits_per_pixel = viafb_bpp1;
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default_var.pixclock =
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default_var.pixclock =
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viafb_get_pixclock(viafb_second_xres, viafb_second_yres,
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viafb_get_pixclock(viafb_second_xres, viafb_second_yres,
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@ -1904,6 +1908,7 @@ static int __devinit via_pci_probe(struct pci_dev *pdev,
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&viafbinfo1->fix);
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&viafbinfo1->fix);
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}
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}
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viafb_check_var(&viafbinfo->var, viafbinfo);
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viafb_update_fix(viafbinfo);
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viafb_update_fix(viafbinfo);
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viaparinfo->depth = fb_get_color_depth(&viafbinfo->var,
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viaparinfo->depth = fb_get_color_depth(&viafbinfo->var,
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&viafbinfo->fix);
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&viafbinfo->fix);
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@ -2070,6 +2075,8 @@ static int __init viafb_init(void)
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#endif
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#endif
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if (parse_mode(viafb_mode, &dummy, &dummy)
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if (parse_mode(viafb_mode, &dummy, &dummy)
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|| parse_mode(viafb_mode1, &dummy, &dummy)
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|| parse_mode(viafb_mode1, &dummy, &dummy)
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|| viafb_bpp < 0 || viafb_bpp > 32
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|| viafb_bpp1 < 0 || viafb_bpp1 > 32
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|| parse_active_dev())
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|| parse_active_dev())
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return -EINVAL;
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return -EINVAL;
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