[PATCH 2.6.19 3/6] tgafb: Support the DirectColor visual
Maciej W. Rozycki
macro at linux-mips.org
Wed Dec 13 17:10:43 UTC 2006
The 32-plane variations of the TGA use the Bt463 RAMDAC and are therefore
DirectColor rather than TrueColor adapters. This is a set of changes to
implement the necessary bits to support this model. A couple of fixes to
fix accesses to the RAMDAC are included as a side-effect.
Signed-off-by: Maciej W. Rozycki <macro at linux-mips.org>
---
This is the most intrusive change in this set of patches. It was tested
both with the console, including the bootstrap logo, and X11 to make sure
palette handling is correct.
Please apply.
Maciej
patch-mips-2.6.18-20060920-tgafb-directcolor-1
diff -up --recursive --new-file linux-mips-2.6.18-20060920.macro/drivers/video/tgafb.c linux-mips-2.6.18-20060920/drivers/video/tgafb.c
--- linux-mips-2.6.18-20060920.macro/drivers/video/tgafb.c 2006-09-20 20:50:52.000000000 +0000
+++ linux-mips-2.6.18-20060920/drivers/video/tgafb.c 2006-12-12 14:28:22.000000000 +0000
@@ -98,6 +98,12 @@ tgafb_check_var(struct fb_var_screeninfo
if (var->bits_per_pixel != 32)
return -EINVAL;
}
+ var->red.length = var->green.length = var->blue.length = 8;
+ if (var->bits_per_pixel == 32) {
+ var->red.offset = 16;
+ var->green.offset = 8;
+ var->blue.offset = 0;
+ }
if (var->xres_virtual != var->xres || var->yres_virtual != var->yres)
return -EINVAL;
@@ -151,7 +157,7 @@ tgafb_set_par(struct fb_info *info)
struct tga_par *par = (struct tga_par *) info->par;
u32 htimings, vtimings, pll_freq;
u8 tga_type;
- int i, j;
+ int i;
/* Encode video timings. */
htimings = (((info->var.xres/4) & TGA_HORIZ_ACT_LSB)
@@ -226,8 +232,10 @@ tgafb_set_par(struct fb_info *info)
BT485_WRITE(par, 0x00, BT485_ADDR_PAL_WRITE);
TGA_WRITE_REG(par, BT485_DATA_PAL, TGA_RAMDAC_SETUP_REG);
+#ifdef CONFIG_HW_CONSOLE
for (i = 0; i < 16; i++) {
- j = color_table[i];
+ int j = color_table[i];
+
TGA_WRITE_REG(par, default_red[j]|(BT485_DATA_PAL<<8),
TGA_RAMDAC_REG);
TGA_WRITE_REG(par, default_grn[j]|(BT485_DATA_PAL<<8),
@@ -235,14 +243,17 @@ tgafb_set_par(struct fb_info *info)
TGA_WRITE_REG(par, default_blu[j]|(BT485_DATA_PAL<<8),
TGA_RAMDAC_REG);
}
- for (i = 0; i < 240*3; i += 4) {
- TGA_WRITE_REG(par, 0x55|(BT485_DATA_PAL<<8),
+ for (i = 0; i < 240 * 3; i += 4) {
+#else
+ for (i = 0; i < 256 * 3; i += 4) {
+#endif
+ TGA_WRITE_REG(par, 0x55 | (BT485_DATA_PAL << 8),
TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x00|(BT485_DATA_PAL<<8),
+ TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x00|(BT485_DATA_PAL<<8),
+ TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x00|(BT485_DATA_PAL<<8),
+ TGA_WRITE_REG(par, 0x00 | (BT485_DATA_PAL << 8),
TGA_RAMDAC_REG);
}
@@ -266,26 +277,24 @@ tgafb_set_par(struct fb_info *info)
/* Fill the palette. */
BT463_LOAD_ADDR(par, 0x0000);
- TGA_WRITE_REG(par, BT463_PALETTE<<2, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
+#ifdef CONFIG_HW_CONSOLE
for (i = 0; i < 16; i++) {
- j = color_table[i];
- TGA_WRITE_REG(par, default_red[j]|(BT463_PALETTE<<10),
- TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, default_grn[j]|(BT463_PALETTE<<10),
- TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, default_blu[j]|(BT463_PALETTE<<10),
- TGA_RAMDAC_REG);
- }
- for (i = 0; i < 512*3; i += 4) {
- TGA_WRITE_REG(par, 0x55|(BT463_PALETTE<<10),
- TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x00|(BT463_PALETTE<<10),
- TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x00|(BT463_PALETTE<<10),
- TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x00|(BT463_PALETTE<<10),
- TGA_RAMDAC_REG);
+ int j = color_table[i];
+
+ TGA_WRITE_REG(par, default_red[j], TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, default_grn[j], TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, default_blu[j], TGA_RAMDAC_REG);
+ }
+ for (i = 0; i < 512 * 3; i += 4) {
+#else
+ for (i = 0; i < 528 * 3; i += 4) {
+#endif
+ TGA_WRITE_REG(par, 0x55, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
}
/* Fill window type table after start of vertical retrace. */
@@ -298,15 +307,12 @@ tgafb_set_par(struct fb_info *info)
TGA_WRITE_REG(par, 0x01, TGA_INTR_STAT_REG);
BT463_LOAD_ADDR(par, BT463_WINDOW_TYPE_BASE);
- TGA_WRITE_REG(par, BT463_REG_ACC<<2, TGA_RAMDAC_SETUP_REG);
+ TGA_WRITE_REG(par, BT463_REG_ACC << 2, TGA_RAMDAC_SETUP_REG);
for (i = 0; i < 16; i++) {
- TGA_WRITE_REG(par, 0x00|(BT463_REG_ACC<<10),
- TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x01|(BT463_REG_ACC<<10),
- TGA_RAMDAC_REG);
- TGA_WRITE_REG(par, 0x80|(BT463_REG_ACC<<10),
- TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, 0x01, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, 0x00, TGA_RAMDAC_REG);
}
}
@@ -434,9 +440,16 @@ tgafb_setcolreg(unsigned regno, unsigned
TGA_WRITE_REG(par, red|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
TGA_WRITE_REG(par, green|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
TGA_WRITE_REG(par, blue|(BT485_DATA_PAL<<8),TGA_RAMDAC_REG);
- } else if (regno < 16) {
- u32 value = (red << 16) | (green << 8) | blue;
- ((u32 *)info->pseudo_palette)[regno] = value;
+ } else {
+ if (regno < 16) {
+ u32 value = (regno << 16) | (regno << 8) | regno;
+ ((u32 *)info->pseudo_palette)[regno] = value;
+ }
+ BT463_LOAD_ADDR(par, regno);
+ TGA_WRITE_REG(par, BT463_PALETTE << 2, TGA_RAMDAC_SETUP_REG);
+ TGA_WRITE_REG(par, red, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, green, TGA_RAMDAC_REG);
+ TGA_WRITE_REG(par, blue, TGA_RAMDAC_REG);
}
return 0;
@@ -1351,7 +1364,7 @@ tgafb_init_fix(struct fb_info *info)
info->fix.type_aux = 0;
info->fix.visual = (tga_type == TGA_TYPE_8PLANE
? FB_VISUAL_PSEUDOCOLOR
- : FB_VISUAL_TRUECOLOR);
+ : FB_VISUAL_DIRECTCOLOR);
info->fix.line_length = par->xres * (par->bits_per_pixel >> 3);
info->fix.smem_start = (size_t) par->tga_fb_base;
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