Speaking of ram width, would it be possible to fix the radeon_driver.c so it doesn't always report 64bit?I don't think this is a matter of the chip revision but rather what the card manufacturer puts around the chip, like DDR vs. SDR RAM and 64-bit vs. 128-bit memory interface and at which frequencies the chip and memory are clocked.
RADEONRAMRec RADEONRAM[] = { /* Memory Specifications
From Radeon Manual */
{ 4, 4, 1, 2, 1, 2, 1, 16, 12, "64-bit SDR SDRAM" },
{ 4, 4, 3, 3, 2, 3, 1, 16, 12, "64-bit DDR SDRAM" },
info->MemCntl = INREG(RADEON_SDRAM_MODE_REG); info->BusCntl = INREG(RADEON_BUS_CNTL);
/* RAM */
switch (info->MemCntl >> 30) {
case 0: offset = 0; break; /* 64-bit SDR SDRAM */
case 1: offset = 1; break; /* 64-bit DDR SDRAM */
default: offset = 0;
}
info->ram = &RADEONRAM[offset];and those cas latency etc. values are likely very wrong with anything else than oldest plain old radeons anyways (though luckily I don't think anyone uses that information in that info record?)
If we're lucky maybe the width of the interface is also encoded in that sdram_mode_reg? And AFAIK it should be possible to probe latency values too (at least some windows tweakers can do it and even change them).
Roland
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