[PATCH] Clean-up and bug fix for tdfxfb framebuffer size detection
Attached is a patch against 2.6.11.7 which tidies up the tdfxfb framebuffer size detection code a little and fixes the broken support for Voodoo4/5 cards. (I haven't tested this on a Voodoo5, however, because I don't have the hardware). Signed-off-by: Richard Drummond <evilrich@rcdrummond.net> Cc: <linux-fbdev-devel@lists.sourceforge.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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2 changed files with 23 additions and 22 deletions
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@ -430,36 +430,35 @@ static void do_write_regs(struct fb_info *info, struct banshee_reg* reg)
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static unsigned long do_lfb_size(struct tdfx_par *par, unsigned short dev_id)
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{
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u32 draminit0 = 0;
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u32 draminit1 = 0;
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u32 miscinit1 = 0;
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u32 lfbsize = 0;
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int sgram_p = 0;
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u32 draminit0;
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u32 draminit1;
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u32 miscinit1;
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int num_chips;
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int chip_size; /* in MB */
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u32 lfbsize;
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int has_sgram;
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draminit0 = tdfx_inl(par, DRAMINIT0);
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draminit1 = tdfx_inl(par, DRAMINIT1);
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num_chips = (draminit0 & DRAMINIT0_SGRAM_NUM) ? 8 : 4;
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if ((dev_id == PCI_DEVICE_ID_3DFX_BANSHEE) ||
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(dev_id == PCI_DEVICE_ID_3DFX_VOODOO3)) {
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sgram_p = (draminit1 & DRAMINIT1_MEM_SDRAM) ? 0 : 1;
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lfbsize = sgram_p ?
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(((draminit0 & DRAMINIT0_SGRAM_NUM) ? 2 : 1) *
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((draminit0 & DRAMINIT0_SGRAM_TYPE) ? 8 : 4) * 1024 * 1024) :
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16 * 1024 * 1024;
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if (dev_id < PCI_DEVICE_ID_3DFX_VOODOO5) {
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/* Banshee/Voodoo3 */
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has_sgram = draminit1 & DRAMINIT1_MEM_SDRAM;
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chip_size = has_sgram ? ((draminit0 & DRAMINIT0_SGRAM_TYPE) ? 2 : 1)
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: 2;
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} else {
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/* Voodoo4/5 */
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u32 chips, psize, banks;
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has_sgram = 0;
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chip_size = 1 << ((draminit0 & DRAMINIT0_SGRAM_TYPE_MASK) >> DRAMINIT0_SGRAM_TYPE_SHIFT);
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}
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lfbsize = num_chips * chip_size * 1024 * 1024;
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chips = ((draminit0 & (1 << 26)) == 0) ? 4 : 8;
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psize = 1 << ((draminit0 & 0x38000000) >> 28);
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banks = ((draminit0 & (1 << 30)) == 0) ? 2 : 4;
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lfbsize = chips * psize * banks;
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lfbsize <<= 20;
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}
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/* disable block writes for SDRAM (why?) */
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/* disable block writes for SDRAM */
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miscinit1 = tdfx_inl(par, MISCINIT1);
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miscinit1 |= sgram_p ? 0 : MISCINIT1_2DBLOCK_DIS;
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miscinit1 |= has_sgram ? 0 : MISCINIT1_2DBLOCK_DIS;
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miscinit1 |= MISCINIT1_CLUT_INV;
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banshee_make_room(par, 1);
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@ -99,6 +99,8 @@
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#define MISCINIT1_2DBLOCK_DIS BIT(15)
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#define DRAMINIT0_SGRAM_NUM BIT(26)
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#define DRAMINIT0_SGRAM_TYPE BIT(27)
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#define DRAMINIT0_SGRAM_TYPE_MASK (BIT(27)|BIT(28)|BIT(29))
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#define DRAMINIT0_SGRAM_TYPE_SHIFT 27
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#define DRAMINIT1_MEM_SDRAM BIT(30)
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#define VGAINIT0_VGA_DISABLE BIT(0)
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#define VGAINIT0_EXT_TIMING BIT(1)
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